JPH1174009A - Contact device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] The present invention suppresses an increase in the outer diameter of a device,
A contact device capable of flowing a large current is obtained. A contact piece (30) has a contact portion (30a) located radially outward, a contact portion (30b) located radially inward, and an axial direction of a second cup-shaped conductor (32). Are arranged in a circumferential direction in a space formed by the second cup-shaped conductor 32 and the first and second flanges 33 and 34 so as to be parallel to. Then, the tip of the first rod-shaped elastic body 35 cantilevered to the first flange 33 is inserted into the hole 30c, and the tip of the second rod-shaped elastic body 36 cantilevered to the second flange 34 is fixed. The contact piece 30 is inserted into the hole 30e so that the first and second rod-shaped elastic members 35,
It is elastically supported by 36.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact device used for a current-carrying part of an electric device.

[0002]

2. Description of the Related Art FIG. 6 is a cross-sectional view showing a conventional contact device disclosed in, for example, Japanese Utility Model Application Laid-Open No. 61-82367.
In the figure, first and second conductors 1 arranged opposite to each other,
2 has a contact portion 1 having a smaller diameter than the conductive portion.
a and 2a are formed coaxially. A tulip contact 4 formed by radial arrangement of a number of contact pieces 3 along an axis is fixed to a contact portion 1 a of the first conductor 1 by a bolt 6 via a holding plate 5. The contact portion 2a of the second conductor 2 is detachably slidably contacted with the opening side of the tulip contact 4. And garter spring 7
Are respectively fitted to both ends of the tulip contact 4 from the outer peripheral side. The garter spring 7 is formed by a helical spring whose overall length is shorter than the circumference circumscribing the contact piece 3, and applies a contact pressure between each contact piece 3 and the contact portions 1a, 2a. The shield 8 has a cylindrical shape, and its inner wall has two guide plates 9 interposed between the adjacent contact pieces 3 attached to an object along the axis and further bent into a trapezoid to make contact. Two fixing leaf springs 10 for pressing the outer periphery of the child piece 3 are provided on the guide plates 9 and 9.
It is attached at a position shifted by 0 degrees. The shield 8 is pushed in from the opening side of the tulip contact 4 fixed to the contact portion 1a so as to insert the guide plate 9 between the adjacent contact pieces 3. Then, the leaf spring 10 is pressed and deformed by the contact piece 3, and the shield 8 is attached so as to cover the tulip contact 4 by the elastic force of the leaf spring 10. The guide plate 9 prevents the contact piece 3 from sagging.

[0003] In the conventional contact device constructed as described above, a large number of contact pieces 3 are bundled between a first conductor 1 and a second conductor 2 by a garter spring 7 to form a contact portion 1.
a and 2a. Since the garter spring 7 is a helix spring whose entire length is shorter than the circumference circumscribing the contact piece 3, the garter spring 7 tries to shrink and presses the contact piece 3 against the contact portions 1a, 2a. Is working. Then, the contact piece 3 slides on the cylindrical surfaces of the contact portions 1a and 2a while receiving the contact force, so that a current can flow through the contact portions. Therefore, such a contact device is used at a connection point of a conductor of a gas insulated switchgear, etc., and facilitates on-site assembling work, and has a role of coping with the conductor expanding and contracting due to energization and temperature change. Play. Further, it is used for movable contacts such as circuit breakers and disconnectors.

[0004]

Since the conventional contact device is constructed as described above, a garter spring 7 must be provided on the outer periphery of the contact 3, and the outer diameter of the entire contact device is reduced to the first diameter. The outer diameter of the first and second conductors 1 and 2 is considerably larger than that of the first and second conductors 1 and 2, and there is a problem that the diameter of the container needs to be increased in a gas insulated switchgear or the like. When this kind of contact device is applied to an application in which a large current flows, it is necessary to provide a large number of contact pieces 3 in parallel in order to increase the contact area. However, in order to apply a pressing force to the contact piece 3 by the tension of the garter spring 7, the larger the number of the contact pieces 3, the smaller the component force acting as the pressing force. Since a spring is required, and the component force acting as the pressing force has a large variation, there is a problem that poor contact is likely to occur.

The present invention has been made to solve the above problems, and has as its object to provide a contact device capable of flowing a large current while suppressing an increase in the outer diameter of the device.

[0006]

A contact device according to the present invention comprises a first cup-shaped conductor coaxially mounted with its bottom face abutting on an end of the first conductor, and the first cup-shaped conductor. A second cup-shaped conductor having an outer diameter smaller than the inner diameter of the second conductor, and coaxially attached to the end of the second conductor by abutting a bottom surface thereof, and an inner diameter of the first cup-shaped conductor. A second flange formed in an annular shape having a small outer diameter and attached to an outer periphery of the second cup-shaped conductor on the opening side; and a second flange attached to the outer periphery of the second cup-shaped conductor. And a first flange attached to the second conductor side at a predetermined distance from the first conductor, and a pair of contact portions respectively at one longitudinal end of one side and the other longitudinal end of the other side. Each has a protruding long rod shape, Contact portion is positioned radially outward, located on the other of the contact portion is radially inward and axially the second
A plurality of circumferentially arranged in a space formed by the second cup-shaped conductor and the first and second flanges so as to be parallel to the axial direction of the cup-shaped conductor. One end of each of the contact pieces is fixed to one of the opposing end faces of the first and second flanges, and the other end is connected to the second cup-shaped conductor and the first flange.
And a second flange extending parallel to the axial direction of the second cup-shaped conductor and being cantilevered to at least one of the first and second flanges. A plurality of contact pieces are arranged in the circumferential direction, the plurality of contact pieces are elastically supported, respectively, the one contact portion is in contact with the inner peripheral surface of the first cup-shaped conductor, and the other contact portion is And a plurality of rod-shaped elastic bodies for applying a contact pressure to the outer peripheral surface of the second cup-shaped conductor to the contact piece.

Further, the rod-shaped elastic bodies are cantilevered to the first and second flanges, respectively, and are arranged in a circumferential direction, and a plurality of contact pieces are arranged in the first and second flanges.
Are elastically supported by a pair of rod-shaped elastic bodies fixed to each of the flanges in a cantilever manner.

[0008] Each of the contact pieces is arranged so that a pair of grooves extends from one end side in the longitudinal direction to the contact portion on the one end side, and the other side faces from one end side in the longitudinal direction. A pair of engaging holes are provided on each end surface of the pair of grooves, and a pair of extending portions of the pair of rod-shaped elastic bodies are provided so as to extend parallel to the axial direction so as to reach the contact portion on the other end side. Each is housed in a groove, and its tip is inserted into each of a pair of engagement holes, and is elastically supported by the pair of rod-shaped elastic bodies.

Further, the rod-shaped elastic bodies are cantilevered to one of the first and second flanges and are radially separated from each other, are arranged in a plurality in two rows in the circumferential direction, and a plurality of contact pieces are provided in the first and second flanges.
And one of the second flanges is elastically supported by a pair of rod-like elastic bodies fixed radially apart from each other and cantilevered.

Each of the contact pieces extends in parallel to the axial direction from the longitudinal end where the contact portion is not provided on one of the side surfaces and the other side of the groove facing the contact portion. A pair of engaging holes are provided on the end face of the groove and the end face on the end side in the longitudinal direction, respectively, and the extension of one of the rod-like elastic bodies is accommodated in the groove, and the tip is formed in the groove. The other end of the rod-shaped elastic body is inserted into the engagement hole provided on the end face on the end side in the longitudinal direction, and is elastically supported by the pair of rod-shaped elastic bodies. Is what is being done.

An annular shield coaxially attached to the end of the first conductor, a pair of annular flanges extending radially inward at both ends of the shield, and a pair of contact portions, respectively. Each of the opposed side surfaces has a longitudinal rod shape protruding from one longitudinal end of the one side surface and the other longitudinal end of the other side surface, and one contact portion is located radially outward, and The contact part is located radially inward,
And, so that the axial direction is parallel to the axial direction of the shield, a plurality of contact pieces arranged in a circumferential direction in a space portion formed by the shield and the pair of flanges,
One end of each is fixed to one of the opposed end surfaces of the pair of flanges, and the other end is parallel to the axial direction of the shield in a space formed by the shield and the pair of flanges. It is extended to, is cantilevered to the flange and is arranged in a plurality in the circumferential direction, elastically supports the plurality of contact pieces, respectively, the one contact portion contacts the inner peripheral surface of the shield, and A plurality of rod-shaped elastic bodies that apply a contact pressure, in which the other contact portion comes into contact with the outer peripheral surface of the second conductor, to the contact piece, the plurality of contact pieces having a pair of grooves facing each other. Extending parallel to the axial direction from the other end in the longitudinal direction to the contact portion on the one end side, and from the other side to the contact portion on the other end side in the longitudinal direction. And a pair of engagement holes are provided in the pair of grooves. The plurality of rod-shaped elastic bodies are provided on each end surface, and the plurality of rod-shaped elastic bodies are cantilevered relative to each other on the pair of flanges and are arranged in a plurality in the circumferential direction. The extending portions of the pair of rod-shaped elastic bodies held and fixed are respectively housed in the pair of grooves, and the tips are inserted into the pair of engagement holes, respectively, and the plurality of contact pieces are respectively formed in the pair of rod-shaped members. It is elastically supported by an elastic body.

An annular shield coaxially attached to the end of the first conductor, a pair of annular flanges extending radially inward at both ends of the shield, and a pair of contact portions, respectively. Each of the opposed side surfaces has a longitudinal rod shape protruding from one longitudinal end of the one side surface and the other longitudinal end of the other side surface, and one contact portion is located radially outward, and The contact part is located radially inward,
And, so that the axial direction is parallel to the axial direction of the shield, a plurality of contact pieces arranged in a circumferential direction in a space portion formed by the shield and the pair of flanges,
One end of each is fixed to one of the opposed end surfaces of the pair of flanges, and the other end is parallel to the axial direction of the shield in a space formed by the shield and the pair of flanges. It is extended to, is cantilevered to the flange and is arranged in a plurality in the circumferential direction, elastically supports the plurality of contact pieces, respectively, the one contact portion contacts the inner peripheral surface of the shield, and A plurality of rod-shaped elastic bodies that apply a contact pressure to the contact piece so that the other contact portion comes into contact with the outer peripheral surface of the second conductor, and the plurality of contact pieces have one and the other grooves facing each other. And extending in parallel with the axial direction from the longitudinal end where the contact portion is not provided on any of the side surfaces to the contact portion, and a pair of engagement holes are provided with an end face of the groove and the longitudinal end. Provided on the end face of the The plurality of rod-shaped elastic bodies are radially separated from each other on one of the pair of flanges and fixed in a cantilever manner, are arranged in two rows in a circumferential direction, and are radially separated from each other on one of the pair of flanges. The extension of one of the pair of rod-shaped elastic bodies fixed in a cantilever manner is accommodated in the groove, and the tip is inserted into the engagement hole provided on the end face of the groove, and the other end is inserted into the groove. The end of the rod-shaped elastic body is inserted into the engagement hole provided on the end face on the end side in the longitudinal direction,
The plurality of contact pieces are each elastically supported by a pair of rod-shaped elastic bodies.

The flange is made of an electrically insulating material.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1 FIG. FIG. 1 is a sectional view showing a contact device according to Embodiment 1 of the present invention, and FIG. 2 is a sectional view taken along the line II-II of FIG. 1 and 2, the first cup-shaped conductor 31 has a bottomed cylindrical shape having an outer diameter equal to that of the first conductor 1, and a cylindrical conductor 31b as a guide portion is concentric with the center thereof. It is provided in. And this first
The cup-shaped conductor 31 is coaxially fastened and fixed to the first conductor 1 by a bolt 39. The second cup-shaped conductor 32 has a bottomed cylindrical shape having an outer diameter smaller than that of the second conductor 2, and is coaxially fastened and fixed to the second conductor 2 by a bolt 40. Further, a guide rod 41 having a spherical outer end surface is fastened and fixed to the axial position of the second cup-shaped conductor 32, and has a fitting structure with the cylindrical conductor 31b. .

The first flange 33 has a two-stage ring shape having a large-diameter portion 33a and a small-diameter portion 33b, and has an end surface on one end (large-diameter portion) side of the second conductor 2. The second cup-shaped conductor 32 is fitted to the outer periphery of the second cup-shaped conductor 32 by abutting against the end face, and is fixedly fastened to the second cup-shaped conductor 32 by a bolt 37. The small diameter portion 3 of the first flange 33
On the outer peripheral surface of 3b, a plurality of grooves 33c extending in parallel with the axial direction are provided at predetermined intervals in the circumferential direction. In addition, hole 3
3d is provided on the end face on the large diameter portion 33a side of each groove 33c. Then, the first rod-shaped elastic body 35 is embedded in a cantilevered state with its root in each of the holes 33d, and the tip end protrudes through each of the grooves 33c. In addition, a plurality of holes 33d
Are provided at a predetermined angular pitch on the same circumference. The second flange 34 has a ring shape having an inner diameter equal to the inner diameter of the second cup-shaped conductor 32 and an outer diameter larger than the outer diameter of the second cup-shaped conductor 32, Bolt 38
Thereby, it is coaxially fastened and fixed to the opening side of the second cup-shaped conductor 32. An annular end face of the second flange 34 extending from the second cup-shaped conductor 32 has a slot 34
a and a plurality of holes 34b are provided radially apart from each other and at predetermined intervals in the circumferential direction. Then, the second rod-shaped elastic body 36 is embedded in a cantilevered state with its root in each of the holes 34b, and the tip side protrudes. The slot 34
a are provided at a predetermined angular pitch on the same circumference, and the holes 34b are provided at a predetermined angular pitch on the same circumference on the inner peripheral side of the slot 34a. Then, the groove 33c, the hole 33d, the groove 34a
The holes 34b are provided on the first flange 33 and the second flange 34 at the same angular pitch. The shield 8 has a cylindrical shape with one end side bent inward, and the bent portion is sandwiched between the second conductor 2 and the first flange 33 to form the second cup-shaped conductor 32. It is attached to cover.

The contact piece 30 is made of, for example, copper and is formed into a long rod shape. Contact portions 30a and 30b are provided on one end of a radially outer surface and the other end of a radially inner surface, respectively. I have. The contact portions 30a and 30b are plated with silver to reduce contact resistance. Further, a groove 30d extending in parallel with the axial direction is provided on the radially outer surface of the contact piece 30 so as to extend from the other end to the contact portion 30a, and a hole 30c as an engagement hole is formed in the contact portion 30a of the groove 30d.
On the side end face. Similarly, a groove 30f extending parallel to the axial direction is provided on the radially inner surface of the contact piece 30 so as to extend from one end to the contact portion 30b, and a hole 30e as an engagement hole is formed on the contact portion 30b side of the groove 30f. It is provided on the end face. On one end surface of the contact piece 30, an engagement protrusion 30 g is provided which is accommodated in a slot 34 a provided in the second flange 34. And the engagement projection 30g
Is accommodated in the groove 34a, the extension of the first rod-shaped elastic body 35 supported in a cantilever fixed state by the first flange 33 is accommodated in the groove 30d, and the tip thereof is inserted into the hole 30c. Further, the extended portion of the second rod-shaped elastic body 36 supported in a cantilever fixed state on the second flange 34 is accommodated in the groove 30f, and the tip thereof is inserted into the hole 30e to form a plurality of contact pieces. 30 are arranged in parallel to the axial direction and at predetermined intervals in the circumferential direction.

Here, the first and second rod-shaped elastic members 3
5, 36 are made of a spring material such as a piano wire, a spring steel wire, a stainless steel wire, a phosphor bronze wire or the like, and may have a square cross section in addition to a circular cross section. The first cup-shaped conductor 31 is made of a good conductor such as copper or aluminum, and its inner peripheral surface 31a that comes into contact with the contact portion 30a is silver-plated to reduce contact resistance. Similarly, the second cup-shaped conductor 32 is made of a good conductor such as copper or aluminum, and its outer peripheral surface 32a in contact with the contact portion 30b is plated with silver to reduce contact resistance. As shown in FIG. 1, the outer peripheral surface of the distal end of the guide rod 41 and the outer peripheral surface of the contact portion 30a of the contact piece 30 are formed in spherical shapes having radii R1 and R2 centered on a point O on the central axis. ing.

In the contact device thus constructed, a plurality of contact pieces 30 parallel to the axial direction are arranged in the circumferential direction. Each contact piece 30 is elastically supported by a first rod-shaped elastic body 35 cantilevered by the first flange 33 and a second rod-shaped elastic body 36 cantilevered by the second flange 34. I have. This first rod-shaped elastic body 35
It is housed in the groove 33c and the groove 30d parallel to the axial direction,
The second rod-shaped elastic body 36 is parallel to the axial direction and
The contact side 30 is accommodated in the groove 30f radially inward with respect to 0d, and each contact side 30 can be moved only in the radial direction, thereby preventing falling. Each contact piece 30 has a contact portion 30.
The side a is urged radially outward by the first rod-shaped elastic body 35, and the contact portion 30b side is urged radially inward by the second rod-shaped elastic body 36. Therefore, the contact portion 30b of each contact piece 30 abuts on the outer peripheral surface 32a of the second cup-shaped conductor 32 by the urging force of the second rod-shaped elastic body 36, and electrical connection is secured. When electrically connecting the first and second conductors 1 and 2, the second conductor 2
Is inserted from the opening side of the first cup-shaped conductor 31 of the first conductor 1. At this time, the tip of the guide rod 41 is guided on the inner peripheral surface of the cylindrical conductor 31b as a guide part, and the contact part 30a of each contact piece 30 is brought into contact with the first cup-shaped conductor 31b.
The second conductor 2 is moved toward the first conductor 1 while sliding on the inner peripheral surface 31a of the first conductor 1. Therefore, the contact portion 3 of each contact piece 30
Oa is in contact with the inner peripheral surface 31a of the first cup-shaped conductor 31 by the urging force of the first rod-shaped elastic body 35, and electrical connection is ensured.

According to the first embodiment, the rod-like elastic members 35 and 36 having the cantilever fixed structure are respectively provided in the grooves 3 of the contact piece 30.
Since the rod-like elastic members 35 and 36 are urged by being housed in the positions 0d and 30f, the rod-shaped elastic members 35 and 36 do not protrude outward in the radial direction, and the outer diameter of the entire contact device can be reduced. If this contact device is used, the size of the gas-insulated switchgear can be reduced. Further, the two bar-shaped elastic members 35 and 36 and the grooves 30d and 30f in which the rod-shaped elastic members 35 and 36 are accommodated can prevent the contact piece 30 from falling down, so that stable current-carrying performance can be obtained. In addition, since the contact pressure is applied to each contact piece 30 by the pair of rod-shaped elastic bodies 35 and 36, a contact pressure with a sufficient size and a small variation is applied, and good current-carrying performance is obtained. Further, a cylindrical conductor 31 is provided coaxially with the first cup-shaped conductor 31, a guide rod 41 fitted to the conductor 31 is provided coaxially with the second cup-shaped conductor 32, and Since the outer peripheral surface of the distal end and the outer peripheral surface of the contact portion 30a of each contact piece 30 are formed in a curved shape with radii R1 and R2 around the point O on the axis, the first and second conductors 1, 2
As shown in FIG. 1, a favorable contact state can be obtained even when the axis 2 is slightly inclined at an angle θ as shown in FIG.

Here, the first and second flanges 33,
If 34 is made of an electrically insulating material such as Teflon, it is possible to prevent the shunt of current when energized, and eliminate troubles such as welding.

Embodiment 2 FIG. FIG. 3 is a sectional view showing a contact device according to Embodiment 2 of the present invention. In FIG. 3, the contact piece 30 has contact portions 30a and 30b provided at one end of a radially outer surface and the other end of a radially inner surface, respectively. And a groove 3 extending parallel to the axial direction.
0d is the contact portion 3 on the radially outer surface of the contact piece 30 from the other end.
0a, and a hole 30c is provided on the end face of the groove 30d on the contact portion 30a side. In addition, a hole 30e is provided on the other end surface of the contact piece 30. In addition, an engagement protrusion 30g is provided on an end surface on one end side of the contact piece 30. The first flange 33 has a large diameter portion 33a and a small diameter portion 3a.
3b is formed into a ring shape having a two-stage outer peripheral surface shape, and an end surface on one end (large-diameter portion) side of the ring shape abuts on an end surface of the second conductor 2 and is fitted to the outer periphery of the second cup-shaped conductor 32. And
It is fastened and fixed to the second conductor 2 by a bolt 37.
In the small diameter portion 33b of the first flange 33, a plurality of grooves 33c extending in parallel with the axial direction are provided at predetermined intervals in the circumferential direction. Further, holes 33d and 33e are provided on the end face of each groove 33c on the large-diameter portion 33a side so as to be spaced apart in the radial direction. Then, the first rod-shaped elastic body 35 and the second rod-shaped elastic body 36 are buried with their roots in the respective holes 33d and 33e in a cantilevered state, and the leading ends protrude through the respective grooves 33c. The plurality of holes 33d are provided at a predetermined angular pitch on the same circumference, and the plurality of holes 33e are provided on the same circumference at a predetermined angular pitch on the radially inner side of the hole 33d. Then, the engaging projection 30g is accommodated in the groove 34a, and the extension of the first rod-shaped elastic body 35 supported in a cantilevered state by the first flange 33 is accommodated in the groove 30d. Is inserted into the hole 30c, and the tip of a second rod-shaped elastic body 36 supported in a cantilevered manner on the first flange 33 is inserted into the hole 30e, so that the plurality of contact pieces 30 are parallel to the axial direction. And at predetermined intervals in the circumferential direction. The other configuration is the same as that of the first embodiment.

In the second embodiment, the first embodiment
The same operation and effect as described above can be obtained. Further, according to the second embodiment, the first rod-shaped elastic body 35 and the second rod-shaped elastic body 3
6 is fixed to the first flange 33, and a pair of rod-like elastic bodies 35 and 36 are provided on the same plane passing through the axis, and are housed in the same groove 33c provided on the first flange 33. Have been. Therefore, the tip of the second rod-shaped elastic body 36 is inserted into the hole 30 e provided on the end face of the contact piece 30,
The contact piece 30 does not require a groove such as the groove 30f in the first embodiment. Therefore, since there is no groove 30f as in the case of the first embodiment, the contact piece 30 can be manufactured at low cost, and the energizing path can be widened, which is advantageous. Further, since the first and second rod-shaped elastic bodies 35 and 36 are cantilevered to the first flange 33 and are disposed on one side of the contact piece 30, the axial length can be reduced. Can be In addition, the second rod-shaped elastic body 36 does not change its bending because the hole 30e of the contact piece 30 does not move in the radial direction, and the bending can be made smaller than that of the first rod-shaped elastic body 35. It can be made short with a thick elastic body. Therefore, it is convenient that the groove 33c has the same width.

Embodiment 3 FIG. FIG. 4 is a sectional view showing a contact device according to Embodiment 3 of the present invention. In FIG. 4, a first cup-shaped conductor 3 as an annular shield is shown.
Numeral 1 has a bottomed cylindrical shape, and is coaxially fastened and fixed to the first conductor 1 with a bolt 39, and also functions as a shield 8. The second conductor 2 includes a contact portion 2a having a tip formed with a small diameter, and does not require the second cup-shaped conductor 32. The first flange 33 has a ring shape, an end face at one end thereof abuts against an inner bottom surface of the first cup-shaped conductor 31, and an outer peripheral face thereof is connected to the first cup-shaped conductor 31.
And is fastened and fixed to the first cup-shaped conductor 31 by bolts 37. A groove 33c extending parallel to the axial direction is formed on the inner peripheral surface of the first flange 33.
Are provided at predetermined intervals in the circumferential direction. further,
A hole 33d is provided in the end face of each groove 33c. Then, the first rod-shaped elastic body 35 is embedded in a cantilevered state with its root in each of the holes 33d, and the tip end protrudes through each of the grooves 33c. The plurality of holes 33d are provided at a predetermined angular pitch on the same circumference. Second flange 3
Reference numeral 4 denotes a ring shape, which is fastened and fixed to the opening-side inner peripheral surface of the first cup-shaped conductor 31 by a bolt 38.
A slot 34a is formed in the inner end face of the second flange 34.
Are provided at predetermined intervals in the circumferential direction. further,
A hole 34b is provided in the end face of each slot 34a. Then, the second rod-shaped elastic body 36 is embedded in a cantilevered state with its root in each of the holes 34b, and the tip side protrudes.
The slots 34a and the holes 34b are provided on the same circumference at a predetermined angular pitch. And the groove 33c, the hole 33
d, the slot 34a and the hole 34b are provided on the first flange 33 and the second flange 34 at the same angular pitch.

The contact piece 30 has contact portions 30a and 30b provided at one end of a radially outer surface and the other end of a radially inner surface, respectively. A groove 30d extending parallel to the axial direction is provided on the radially inner surface of the contact piece 30 so as to extend from one end to the contact portion 30b, and a hole 30c is formed in the groove 30d.
Is provided on the end face on the side of the contact portion 30b. Similarly, a groove 30f extending parallel to the axial direction is provided on the radially outer surface of the contact piece 30 so as to reach the contact portion 30a from the other end, and a hole 30e is provided on the end surface of the groove 30f on the contact portion 30a side. ing. On the other end surface of the contact piece 30, an engagement protrusion 30 g is provided which is accommodated in a slot 34 a provided in the second flange 34. And the engagement projection 30g
Is accommodated in the groove 34a, the extension of the first rod-shaped elastic body 35 supported in a cantilever fixed state by the first flange 33 is accommodated in the groove 30d, and the tip thereof is inserted into the hole 30c. Further, the extended portion of the second rod-shaped elastic body 36 supported in a cantilever fixed state on the second flange 34 is accommodated in the groove 30f, and the tip thereof is inserted into the hole 30e to form a plurality of contact pieces. 30 are arranged in parallel to the axial direction and at predetermined intervals in the circumferential direction. Other configurations are the same as those of the first embodiment.
It is configured similarly to.

In the contact device thus constructed, a plurality of contact pieces 30 parallel to the axial direction are arranged in the circumferential direction. Each contact piece 30 is elastically supported by a first rod-shaped elastic body 35 cantilevered by the first flange 33 and a second rod-shaped elastic body 36 cantilevered by the second flange 34. I have. This first rod-shaped elastic body 35
It is housed in the groove 33c and the groove 30d parallel to the axial direction,
The second rod-shaped elastic body 36 is parallel to the axial direction and
The contact side 30 is accommodated in a groove 30f that is radially outward with respect to 0d, and each contact side 30 can move only in the radial direction, thereby preventing falling. Each contact piece 30 has a contact portion 30.
The side a is urged radially outward by a second rod-shaped elastic body 36, and the contact portion 30b side is urged radially inward by a first rod-shaped elastic body 35. Therefore, the contact portion 30a of each contact piece 30 abuts on the inner peripheral surface 31a of the first cup-shaped conductor 31 by the urging force of the second rod-shaped elastic body 36, and electrical connection is ensured. When electrically connecting the first and second conductors 1 and 2, the second conductor 2
Is inserted from the opening side of the first cup-shaped conductor 31 of the first conductor 1. At this time, while the contact portion 30b of each contact piece 30 slides on the contact portion 2a of the second conductor 2, the second conductor 2
Is guided by the second flange 34 and moved to the first conductor 1 side. Therefore, the contact portion 30b of each contact piece 30 comes into contact with the contact portion 2a of the second conductor 2 by the urging force of the first rod-shaped elastic body 35, and electrical connection is secured.

In the third embodiment, the same effects as in the first embodiment can be obtained. Further, according to the third embodiment, the first cup-shaped conductor 31 is
The first cup-shaped conductor 31 also functions as a shield and eliminates the need for the shield 8 because the contact portion 2a is formed so that the distal end side of the second conductor 2 has a small diameter. In addition, the second cup-shaped conductor 32 is not required. Further, since the second flange 34 functions as a guide for the second conductor 2 when electrically connecting the first and second conductors 1 and 2, the guide rod 41 and the cylindrical conductor 31b are not required. I have. Therefore, the number of components can be reduced, and a small-diameter contact device excellent in current-carrying ability due to a good contact state can be manufactured at a low cost with a simple structure. And
When the outer diameter of the first and second conductors 1 and 2 is small,
The structure according to the third embodiment is suitable.

In the third embodiment, the second flange 34 functions as a guide when the first and second conductors 1 and 2 are connected. However, similar to the first embodiment, The guide rod 41 and the cylindrical conductor 31b may be provided.

Embodiment 4 FIG. 5 is a sectional view showing a contact device according to Embodiment 4 of the present invention. In FIG. 5, the contact piece 30 has contact portions 30a and 30b provided on one end of a radially outer surface and the other end of a radially inner surface, respectively. And a groove 3 extending parallel to the axial direction.
0d is a contact portion 3 from one end to the radially inner surface of the contact piece 30.
0b, and a hole 30c is provided on the end face of the groove 30d on the contact portion 30b side. Further, a hole 30e is provided on the end face on one end side of the contact piece 30 radially outside the groove 30d. In addition, an engagement protrusion 30g is provided on the end face on the other end side of the contact piece 30. The first flange 33 is
A ring-shaped outer end face having a first cup-shaped conductor 3
1 and the outer peripheral surface thereof is in contact with the inner peripheral surface of the first cup-shaped conductor 31 so that the bolt 3
7, it is fastened and fixed to the first cup-shaped conductor 31. In the first flange 33, a plurality of grooves 33c extending in parallel with the axial direction are provided at predetermined intervals in the circumferential direction. Further, holes 33d and 33e are provided on the end face of each groove 33c so as to be spaced apart in the radial direction. Then, the first rod-shaped elastic body 35 and the second rod-shaped elastic body 36 are buried with their roots in the respective holes 33d and 33e in a cantilevered state, and the leading ends protrude through the respective grooves 33c. The plurality of holes 33d are provided at a predetermined angular pitch on the same circumference,
The plurality of holes 33e are provided at a predetermined angular pitch on the same circumference on the radially inner side of the hole 33d. Second flange 34
Is formed in a ring shape, and is fastened and fixed to the opening-side inner peripheral surface of the first cup-shaped conductor 31 by a bolt 38. On the inner end face of the second flange 34, a plurality of slots 34a are provided at predetermined intervals in the circumferential direction. The slots 34a are provided at a predetermined angular pitch on the same circumference.
Then, the groove 33c, the hole 33d, the groove hole 34a and the hole 34
b is provided on the first flange 33 and the second flange 34 at the same angular pitch. Then, the engagement projection 30g is housed in the slot 34a, and the first flange 3
First rod-shaped elastic body 35 supported in a cantilever fixed state at 3
Is inserted into the groove 30d, and the tip of the extension is
And the tip of a second rod-shaped elastic body 36 supported in a cantilevered state on the first flange 33 is inserted into the hole 30.
e, the plurality of contact pieces 30 are parallel to the axial direction,
In addition, they are arranged at predetermined intervals in the circumferential direction. The other configuration is the same as that of the third embodiment.

In the fourth embodiment, the third embodiment
The same operation and effect as described above can be obtained. Further, according to the fourth embodiment, the first rod-shaped elastic body 35 and the second rod-shaped elastic body 3
6 is fixed to the first flange 33, and a pair of rod-like elastic bodies 35 and 36 are provided on the same plane passing through the axis, and are housed in the same groove 33c provided on the first flange 33. Have been. Therefore, the tip of the second rod-shaped elastic body 36 is inserted into the hole 30 e provided on the end face of the contact piece 30,
The contact piece 30 does not require a groove such as the groove 30f in the third embodiment. Therefore, since there is no groove 30f as in the case of the third embodiment, the contact piece 30 can be manufactured at a low cost, and the energizing path can be widened, which is advantageous. Further, since the first and second rod-shaped elastic bodies 35 and 36 are cantilevered to the first flange 33 and are disposed on one side of the contact piece 30, the axial length can be reduced. Can be

[0030]

Since the present invention is configured as described above, it has the following effects.

According to the present invention, the first cup-shaped conductor coaxially mounted with the bottom face abutting on the end of the first conductor, and the outer diameter smaller than the inner diameter of the first cup-shaped conductor A second cup-shaped conductor coaxially mounted with its bottom face against the end of the second conductor, and
A second flange formed in an annular shape having an outer diameter smaller than the inner diameter of the cup-shaped conductor, and being attached to the outer periphery of the second cup-shaped conductor on the opening side; and the second cup-shaped conductor A first flange attached to the outer periphery of the first flange at a predetermined distance from the second flange to the second conductor side;
Each of the pair of contact portions has a longitudinal rod-like shape protruding from one longitudinal end of one side and the other longitudinal end of the other side, and one contact portion is radially outward. , The other contact portion is located radially inward, and the second cup-shaped conductor and the second cup-shaped conductor so that the axial direction is parallel to the axial direction of the second cup-shaped conductor A plurality of contact pieces arranged in a circumferential direction in a space formed by the first and second flanges, and one end of each of the plurality of contact pieces being one of opposing end faces of the first and second flanges; The second cup-shaped conductor is fixed to an end face, and the other end is parallel to the axial direction of the second cup-shaped conductor in a space formed by the second cup-shaped conductor and the first and second flanges. Extended to at least one of the first and second flanges A plurality of the contact pieces are held and fixed and are arranged in the circumferential direction, the plurality of contact pieces are elastically supported, and the one contact portion is in contact with the inner peripheral surface of the first cup-shaped conductor, and Since the contact portion includes a plurality of rod-shaped elastic bodies that apply a contact pressure to the outer peripheral surface of the second cup-shaped conductor to the contact piece, it is possible to flow a large current while suppressing an increase in the outer diameter. A contact device that can be obtained is obtained.

The rod-shaped elastic members are cantilevered to the first and second flanges, respectively, and are arranged in a circumferential direction, and a plurality of contact pieces are provided in the first and second flanges.
Are elastically supported by a pair of rod-shaped elastic bodies fixed to each other in a cantilever manner, so that the contact pressure of each contact piece is regulated by the pair of rod-shaped elastic bodies, thereby suppressing variation in the contact pressure. be able to.

Each of the contact pieces extends from one end side in the longitudinal direction to the contact portion on the one end side on one side surface facing the pair of grooves, and from one end side in the longitudinal direction on the other side surface. A pair of engaging holes are provided on each end surface of the pair of grooves, and a pair of extending portions of the pair of rod-shaped elastic bodies are provided so as to extend parallel to the axial direction so as to reach the contact portion on the other end side. Each of the rod-shaped elastic bodies is accommodated in the groove, and its tip is inserted into a pair of engagement holes and elastically supported by the pair of rod-shaped elastic bodies. The outer diameter can be reduced, and the contact piece can be prevented from falling down in the circumferential direction, so that stable current-carrying performance can be obtained.

The plurality of rod-like elastic bodies are cantilevered and fixed to one of the first and second flanges in a radially spaced relation to each other, and are arranged in two rows in a circumferential direction.
And one of the second flanges is elastically supported by a pair of rod-shaped elastic bodies that are radially separated from each other and are cantilevered, so that the contact pressure of each contact piece is defined by the pair of rod-shaped elastic bodies, The variation in contact pressure can be suppressed, and the length in the axial direction can be reduced.

Each of the contact pieces extends in parallel to the axial direction from the longitudinal end where the contact portion is not provided on one of the side surfaces and the other side of the groove, to the contact portion. A pair of engaging holes are provided on the end face of the groove and the end face on the end side in the longitudinal direction, respectively, and the extension of one of the rod-like elastic bodies is accommodated in the groove, and the tip is formed in the groove. The other end of the rod-shaped elastic body is inserted into the engagement hole provided on the end face on the end side in the longitudinal direction, and is elastically supported by the pair of rod-shaped elastic bodies. As a result, the rod-shaped elastic body does not protrude outward in the radial direction, the outer diameter of the device is reduced, and the contact piece is prevented from falling down in the circumferential direction, so that stable energizing performance is obtained. further,
A groove for accommodating the other rod-shaped elastic body is not required, so that a contact piece can be manufactured at low cost and a wide current path can be secured.

An annular shield coaxially attached to the end of the first conductor, a pair of annular flanges extending radially inward at both ends of the shield, and a pair of contact portions, respectively. Each of the opposed side surfaces has a longitudinal rod shape protruding from one longitudinal end of the one side surface and the other longitudinal end of the other side surface, and one contact portion is located radially outward, and The contact part is located radially inward,
And, so that the axial direction is parallel to the axial direction of the shield, a plurality of contact pieces arranged in a circumferential direction in a space portion formed by the shield and the pair of flanges,
One end of each is fixed to one of the opposed end surfaces of the pair of flanges, and the other end is parallel to the axial direction of the shield in a space formed by the shield and the pair of flanges. It is extended to, is cantilevered to the flange and is arranged in a plurality in the circumferential direction, elastically supports the plurality of contact pieces, respectively, the one contact portion contacts the inner peripheral surface of the shield, and A plurality of rod-shaped elastic bodies that apply a contact pressure, in which the other contact portion comes into contact with the outer peripheral surface of the second conductor, to the contact piece, the plurality of contact pieces having a pair of grooves facing each other. Extending parallel to the axial direction from the other end in the longitudinal direction to the contact portion on the one end side, and from the other side to the contact portion on the other end side in the longitudinal direction. And a pair of engagement holes are provided in the pair of grooves. The plurality of rod-shaped elastic bodies are provided on each end surface, and the plurality of rod-shaped elastic bodies are cantilevered relative to each other on the pair of flanges and are arranged in a plurality in the circumferential direction. The extending portions of the pair of rod-shaped elastic bodies held and fixed are respectively housed in the pair of grooves, and the tips are inserted into the pair of engagement holes, respectively, and the plurality of contact pieces are respectively formed in the pair of rod-shaped members. Since it is elastically supported by the elastic body, a contact device capable of flowing a large current while suppressing an increase in the outer diameter is obtained. Further, since the contact pressure of each contact piece is defined by the pair of rod-shaped elastic bodies, the variation of the contact pressure is suppressed,
Poor contact can be prevented.

An annular shield coaxially attached to the end of the first conductor, a pair of annular flanges extending radially inward at both ends of the shield, and a pair of contact portions, respectively. Each of the opposed side surfaces has a longitudinal rod shape protruding from one longitudinal end of the one side surface and the other longitudinal end of the other side surface, and one contact portion is located radially outward, and The contact part is located radially inward,
And, so that the axial direction is parallel to the axial direction of the shield, a plurality of contact pieces arranged in a circumferential direction in a space portion formed by the shield and the pair of flanges,
One end of each is fixed to one of the opposed end surfaces of the pair of flanges, and the other end is parallel to the axial direction of the shield in a space formed by the shield and the pair of flanges. It is extended to, is cantilevered to the flange and is arranged in a plurality in the circumferential direction, elastically supports the plurality of contact pieces, respectively, the one contact portion contacts the inner peripheral surface of the shield, and A plurality of rod-shaped elastic bodies that apply a contact pressure to the contact piece so that the other contact portion comes into contact with the outer peripheral surface of the second conductor, and the plurality of contact pieces have one and the other grooves facing each other. And extending in parallel with the axial direction from the longitudinal end where the contact portion is not provided on any of the side surfaces to the contact portion, and a pair of engagement holes are provided with an end face of the groove and the longitudinal end. Provided on the end face of the The plurality of rod-shaped elastic bodies are radially separated from each other on one of the pair of flanges and fixed in a cantilever manner, are arranged in two rows in a circumferential direction, and are radially separated from each other on one of the pair of flanges. The extension of one of the pair of rod-shaped elastic bodies fixed in a cantilever manner is accommodated in the groove, and the tip is inserted into the engagement hole provided on the end face of the groove, and the other end is inserted into the groove. The end of the rod-shaped elastic body is inserted into the engagement hole provided on the end face on the end side in the longitudinal direction,
Since the plurality of contact pieces are each elastically supported by the pair of rod-shaped elastic bodies, a contact device capable of flowing a large current while suppressing an increase in the outer diameter is obtained. Further, since the contact pressure of each contact piece is defined by the pair of rod-shaped elastic bodies, variation in the contact pressure can be suppressed, and poor contact can be prevented. Furthermore, a groove for accommodating the other rod-shaped elastic body is not required, so that the contact piece can be manufactured at low cost and a wide current path can be secured.

Further, since the flange is made of an electrically insulating material, it is possible to prevent a shunt of current at the time of energization.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a contact device according to Embodiment 1 of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a sectional view showing a contact device according to Embodiment 2 of the present invention.

FIG. 4 is a sectional view showing a contact device according to Embodiment 3 of the present invention.

FIG. 5 is a sectional view showing a contact device according to Embodiment 4 of the present invention.

FIG. 6 is a sectional view showing a conventional contact device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 1st conductor, 2nd conductor, 30 contact piece, 30
a, 30b contact portion, 30c, 30e hole (engagement hole),
30d, 30f groove, 31 first cup-shaped conductor (annular shield), 32 second cup-shaped conductor, 33
1st flange, 34 2nd flange, 35 1st rod-shaped elastic body, 36 2nd rod-shaped elastic body.

Claims (8)

[Claims] 1. A first cup-shaped conductor which is coaxially attached with its bottom face abutting on an end of the first conductor, and has an outer diameter smaller than an inner diameter of the first cup-shaped conductor, A second cup-shaped conductor coaxially mounted with the bottom face abutting against an end of the second conductor, and an annular shape having an outer diameter smaller than the inner diameter of the first cup-shaped conductor; A second flange attached to an outer periphery of the opening side of the second cup-shaped conductor; and a second flange attached to an outer periphery of the second cup-shaped conductor at a predetermined distance from the second flange to the second conductor side. The first flange, and a pair of contact portions, each of which has a longitudinal rod-like shape protruding from one end in the longitudinal direction on one side and the other end in the longitudinal direction on the other side. Is located radially outward and the other contact The second cup-shaped conductor and the first and second flanges are positioned radially inward, and the axial direction is parallel to the axial direction of the second cup-shaped conductor. A plurality of contact pieces arranged in a circumferential direction in a space portion composed of: and one end of each of the plurality of contact pieces is fixed to one of the opposed end surfaces of the first and second flanges, and the other end. Extends in a space defined by the second cup-shaped conductor and the first and second flanges in parallel with the axial direction of the second cup-shaped conductor, and At least one of the second flanges is cantilevered and is arranged in a plurality in the circumferential direction, elastically supports the plurality of contact pieces, and the one contact portion is an inner peripheral surface of the first cup-shaped conductor. And the other contact portion is in contact with the second
And a plurality of rod-shaped elastic bodies for applying a contact pressure to the outer peripheral surface of the cup-shaped conductor to the contact piece. 2. A plurality of rod-shaped elastic bodies are cantilevered to each of the first and second flanges and are arranged in a circumferential direction in a cantilever manner, and a plurality of contact pieces are provided on each of the first and second flanges. 2. The contact device according to claim 1, wherein the contact device is elastically supported by a pair of rod-shaped elastic bodies fixed to each other and cantilevered to each other. 3. Each of the contact pieces extends from one end side in the longitudinal direction to a contact portion on one end side on one side surface facing the pair of grooves, and the other side surface extends from one end side in the longitudinal direction on the other side. Each is extended parallel to the axial direction to reach the contact part on the end side,
A pair of engagement holes are provided on each end surface of the pair of grooves, the extending portions of the pair of rod-shaped elastic bodies are respectively housed in the pair of grooves, and the tips are inserted into the pair of engagement holes, respectively. 3. The contact device according to claim 2, wherein the contact device is elastically supported by the pair of rod-shaped elastic members. 4. A plurality of rod-shaped elastic bodies are fixed to one of the first and second flanges in a cantilever manner while being radially separated from each other and arranged in two rows in a circumferential direction, and a plurality of contact pieces are provided in the first and second flanges. 2. The contact device according to claim 1, wherein each of the two flanges is elastically supported by a pair of rod-shaped elastic bodies fixed radially apart from each other and cantilevered. 5. Each of the contact pieces extends in parallel with the axial direction from the longitudinal end where the contact portion is not provided on one of the side surface and the other side surface facing the groove to the contact portion. A pair of engaging holes are provided on the end face of the groove and the end face on the end side in the longitudinal direction, respectively, and an extension of one of the rod-like elastic bodies is accommodated in the groove, and the tip end is the end face of the groove. The other end of the rod-shaped elastic body is inserted into the engagement hole provided on the end face on the end side in the longitudinal direction, and is elastically supported by the pair of rod-shaped elastic bodies. The contact device according to claim 4, wherein 6. An annular shield coaxially attached to the end of the first conductor, a pair of annular flanges extending radially inward at both ends of the shield, and a pair of contact portions, respectively. Each of the opposed side surfaces has a longitudinal rod shape protruding from one longitudinal end of the one side surface and the other longitudinal end of the other side surface, and one contact portion is located radially outward, and The contact portion is located radially inward, and a plurality of circumferentially arranged in a space formed by the shield and the pair of flanges so that the axial direction is parallel to the axial direction of the shield. And a plurality of contact pieces, one end of which is fixed to one of the opposite end faces of the pair of flanges, and the other end of which is in a space formed by the shield and the pair of flanges. Axial direction of shield Are extended in parallel with each other, are cantilevered to the flange, are arranged in a plurality in the circumferential direction, elastically support the plurality of contact pieces, respectively, and the one contact portion contacts the inner peripheral surface of the shield. And a plurality of rod-shaped elastic bodies that apply a contact pressure to the contact piece so that the other contact portion comes into contact with the outer peripheral surface of the second conductor, and the plurality of contact pieces have a pair of grooves, respectively. In parallel with the axial direction so as to reach one side from the other end in the longitudinal direction to the contact portion on one end, and to the other side from the one end in the longitudinal direction to the contact portion on the other end. A pair of engagement holes are provided on each end face of the pair of grooves, and the plurality of rod-shaped elastic bodies are cantilevered to each of the pair of flanges so as to face each other, and are arranged in a plurality in the circumferential direction. Relative to each other of the pair of flanges. The extending portions of the pair of rod-like elastic bodies fixed in a cantilever manner are respectively accommodated in the pair of grooves, and the tips thereof are inserted into the pair of engagement holes, respectively, so that the plurality of contact pieces are respectively in the pair. A contact device that is elastically supported by said rod-shaped elastic body. 7. An annular shield coaxially attached to an end of the first conductor, a pair of annular flanges extending radially inward at both ends of the shield, and a pair of contact portions, respectively. Each of the opposed side surfaces has a longitudinal rod shape protruding from one longitudinal end of the one side surface and the other longitudinal end of the other side surface, and one contact portion is located radially outward, and The contact portion is located radially inward, and a plurality of circumferentially arranged in a space formed by the shield and the pair of flanges so that the axial direction is parallel to the axial direction of the shield. And a plurality of contact pieces, one end of which is fixed to one of the opposite end faces of the pair of flanges, and the other end of which is in a space formed by the shield and the pair of flanges. Axial direction of shield Are extended in parallel with each other, are cantilevered to the flange, are arranged in a plurality in the circumferential direction, elastically support the plurality of contact pieces, respectively, and the one contact portion contacts the inner peripheral surface of the shield. And a plurality of rod-shaped elastic bodies for applying the contact pressure, at which the other contact portion contacts the outer peripheral surface of the second conductor, to the contact piece, wherein each of the plurality of contact pieces has a groove facing each other. And extending in parallel with the axial direction from the longitudinal end where the contact portion is not provided on one of the other side surfaces to the contact portion, and a pair of engagement holes are provided at the end face of the groove and the longitudinal direction. The plurality of rod-shaped elastic bodies are respectively provided on one end of the pair of flanges, are radially separated from each other, are cantilevered, and are arranged in two rows in the circumferential direction, and the plurality of rod-shaped elastic bodies are arranged in two rows. Cantilevered radially separated from one of the flanges The extension of one of the fixed pair of rod-shaped elastic bodies is accommodated in the groove, and the tip is inserted into the engaging hole provided on the end face of the groove, and the other rod-shaped elastic body is inserted. A contact wherein a tip of a body is inserted into the engagement hole provided in an end face on an end portion side in the longitudinal direction, and the plurality of contact pieces are elastically supported by a pair of rod-shaped elastic bodies, respectively. Child device. 8. The contact device according to claim 1, wherein the flange is made of an electrically insulating material.