JPH0343657Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a connection device at a disconnection section of a circuit breaker, switch, etc., and particularly relates to a connection device that can be connected from two directions.

[Conventional technology]

Conventionally, a connecting device in a disconnecting section of a circuit breaker, a switch, etc. is constructed as shown in FIG. A pair of contact pieces 4 are provided, and when the contact piece 5 on the equipment side moves back and forth between the disconnecting device and the insertion completion position, the contact piece 5 approaches and separates from the contact piece 4, and the contact at the insertion completion position is made. The contact piece 4 is brought into contact with the child 5 with contact pressure from a pressure spring 6. In addition, 7 is contact 5
This is a stopper.

By the way, in this type of connecting device, in order to enable connection from two directions, the contact piece 4 is connected only in one direction, so as shown in the figure, the contact piece 4 is attached to the other end of the fixed conductor 2. Axis 3' symmetrically to contact piece 4
It is necessary to provide a pair of contact piece 4' supported by the contact piece 4', and to bring the contact piece 5' from the other side into contact with and away from the contact piece 4'. Note that 6' and 7' are pressure springs and stoppers.

[The problem that the idea aims to solve]

However, according to the conventional connecting device, in order to connect in two directions, the same contact pieces 4 and 4' must be provided and arranged symmetrically, which increases the number of parts and complicates the structure. This method has the drawbacks that it becomes expensive and expensive, and that the device becomes large in size.

In addition, since the contact pieces 4 and 4' at both ends of the fixed conductor 2 have corners and protrusions at their respective outer tips, the potential gradient of the contact part becomes high in the conductive state, making it easy for corona to occur. Therefore, it is necessary to increase the insulation dimension.

This invention was made with the above-mentioned points in mind, and aims to enable two-way connection with a simple structure, reduce the cost, and alleviate the electric field.

[Means to solve the problem]

In order to achieve the above object, the connecting device of this invention includes a cylindrical conductive block whose base is integrally supported by a fixing fitting, and bases arranged at equal intervals in the circumferential direction on the outer peripheral surface of this block. A plurality of axially long outer contact pieces are attached to the outer circumferential surface of the base of the block, and the tips of each outer contact piece are provided at the tip of the block and are elastically biased outward. A plurality of outer pressure springs are placed in contact with the inner circumferential surface of one of the cylindrical connecting conductors loosely inserted from the side, and are arranged at equal intervals in the circumferential direction on the inner circumferential surface of the block, each with its base at the tip of the block. A plurality of axially long inner contact pieces are attached to the inner circumferential surface of the block, and the tip of each inner contact piece provided at the base of the block is elastically biased inward to release the block from the base side. and a plurality of inner pressure springs brought into contact with the outer circumferential surface of the other inserted cylindrical connection conductor.

[Effect]

For connection devices configured as described above,
By loosely inserting one of the connecting conductors into the conductive block from its tip side, the plurality of outer contact pieces individually attached to the outer peripheral surface of the conductive block are elastically biased by their respective outer pressure springs. Therefore, a plurality of inner contact pieces are individually attached to the inner circumferential surface of the conductive block by contacting the inner circumferential surface of one of the connecting conductors and loosely inserting the other connecting conductor from the base side of the conductive block. comes into contact with the outer circumferential surface of the other connecting conductor due to the elastic force of the respective inner pressure springs.

In this case, since both connecting conductors are in contact with the conductive block on the outside and inside, respectively, a large contact stroke can be taken for each, and a large sliding distance can be taken as a whole between both connecting conductors.

Here, since each contact piece attached to the outer circumferential surface and the inner circumferential surface of the conductive block is individually biased by a pressure spring, damage to the pressure spring in one of the pieces may occur. Even if the function stops, the remaining contact pieces can form a stable contact state.

On the other hand, the conductive block is constructed in a cylindrical shape, and long contact pieces are attached in the axial direction on the inner and outer circumferential surfaces at equal intervals, resulting in a shape with few corners and protrusions, which alleviates the electric field in the conductive state. .

〔Example〕

Next, this idea will be described in the second section showing one embodiment of the invention.
This will be explained in detail with reference to the drawings below.

In these drawings, reference numeral 8 denotes a fixture fixed to a frame (not shown), 9 a cylindrical conductive block whose base is integrally supported by the fixture 8, and 10.
is fitted to the outer circumferential portion of the tip of the block 9, and the screw 11
A stopper piece 10' is formed on the base side of the block 10 with a space between it and the outer peripheral surface of the conductive block 9.

Reference numeral 12 denotes four outer contact pieces that are attached to the outer peripheral surface of the conductive block 9 in the axial direction and arranged at equal intervals of 90 degrees, and each contact piece 12 has a base that is attached to the outer circumference of the base of the conductive block 9. It is attached to the surface with a screw 14 via a spacer 13, and its tip is inserted inside the stopper piece 10', and a contact 15 is fixed to the outer surface of the tip of each contact piece 12. Reference numeral 16 designates four cap-shaped insulating spring receivers that are opened in the outer circumferential direction and are inserted through the positions of the contacts 15 of each contact piece 12 at the tip of the conductive block 9, and reference numeral 17 is housed in each spring receiver 16. This is an outer pressure spring that biases the contact point 15 portion of each outer contact piece 12 outward, and the excessive bending of the contact piece 12 outward by the spring 17 causes the stopper piece portion 10 ’ is suppressed.

Reference numeral 18 denotes four inner contact pieces that are attached to the inner peripheral surface of the conductive block 9 in the axial direction and are arranged at equal intervals of 90 degrees with an angular difference of 45 degrees from the outer contact pieces 12, The base of each contact piece 18 is attached to the inner peripheral surface of the tip of the conductive block 9 with a bolt 20 via a spacer 19, and a contact 21 is fixed to the inner surface of the tip of each contact piece 18. ing. Reference numeral 22 denotes a contact point 21 in each contact piece 18 at the base of the conductive block 9.
2. Four cap-shaped insulating spring receivers each having openings in the inner circumferential direction and penetrating through them at positions corresponding to the 2
Reference numeral 3 designates an inner pressure spring that is housed in each spring receiver 22 and biases the contact point 21 portion of each inner contact piece 18 inwardly.

24 is a block 9 on the tip side of the conductive block 9.
This is one connecting conductor that is provided coaxially and movably in the axial direction and has a larger diameter than the conductive block 9. By loosely inserting the connecting conductor 24 from the tip side of the conductive block 9 to the outside of the block 9, each Each contact 15 of the outer contact piece 12 contacts the inner peripheral surface of the connection conductor 24 with sufficient contact pressure from the pressure spring 17. Reference numeral 25 denotes the other connecting conductor which is provided on the base side of the conductive block 9 coaxially with the block 9 and movable in the axial direction and has a smaller diameter than the conductive block 9. By being loosely inserted inside block 9,
Each contact point 21 of each inner contact piece 18 contacts the outer circumferential surface of the connecting conductor 25 with sufficient contact pressure from the pressure spring 23 .

Therefore, according to the embodiment, the connection conductors 24 and 25 can be connected to the conductive block 9 from the tip side and the base side of the conductive block 9, respectively, and a two-way connection is possible.
Furthermore, an outer contact piece 12 for contacting one of the connecting conductors 24 is attached to the outer peripheral surface of the conductive block 9, and an inner contact piece 18 for contacting the other connecting conductor 25 is attached to the inner peripheral surface of the conductive block 9. Since connections can be made on the outside and inside of the conductive block 9, the structure is simple and the device can be made smaller and less expensive.

Also, one of the connecting conductors 24 is loosely inserted into the outside of the conductive block 9 and connected, and the other connecting conductor 25 is loosely inserted into the inside of the conductive block 9 and connected. Contact stroke S ₁ with the outer contact piece 12 and contact stroke between the other connecting conductor 25 and the inner contact piece 18
It is possible to increase S ₂ and stabilize the contact.

Further, since the conductive block 9 is formed in a cylindrical shape and has contact pieces 12 and 18 attached to its outer and inner circumferential surfaces, respectively, and has a shape with few corners and protrusions, the electric field in the conductive state can be relaxed. , the corona starting voltage is increased, and the insulation dimensions can be reduced.

[Effect of idea]

Since this invention is configured as described above, it produces the effects described below.

Loosely insert large-diameter and small-diameter connecting conductors into the conductive block from the tip and base sides of the cylindrical conductive block, and bring the contact pieces attached to the outer and inner circumferential surfaces of the conductive block, respectively, into contact with both connecting conductors. This makes it possible to connect from two directions with a simple structure, and also allows for a large contact stroke of both connecting conductors with respect to the conductive block, increasing the overall sliding distance.
In addition to fully absorbing dimensional errors in the connecting parts,
The device can be made smaller and less expensive.

In addition, the contact pieces on the inner and outer peripheries of the conductive block are each independently elastically biased by pressure springs, so even if any contact piece stops functioning due to damage to its pressure spring, the remaining contact pieces remain. The connection state can be maintained stably with the contact piece, which has the effect of increasing connection reliability.

Furthermore, long contact strips are attached at equal intervals in the axial direction on the inner and outer circumferential surfaces of the cylindrical conductive block, making it possible to create a shape with fewer corners and protrusions. This makes it possible to increase the insulation properties.

[Brief explanation of the drawing]

Figure 1 is a front view of a conventional connecting device, Figure 2 and the following drawings show an embodiment of the connecting device of this invention,
FIG. 2 is a side view, and FIGS. 3 and 4 are front views taken along line X-X' and Y-Y' in FIG. 2, respectively. 9... Conductive block, 12... Outer contact piece,
18... Inner contact piece, 24... One connection conductor, 25... Other connection conductor.

Claims (1)

[Claims for Utility Model Registration] A cylindrical conductive block whose base is integrally supported by a fixing fitting, and which are arranged at equal intervals in the circumferential direction on the outer peripheral surface of the block, and whose respective bases are attached to the outer peripheral surface of the base of the block. and a plurality of axially long outer contact pieces provided at the distal end of the block, each of which is elastically biased outward to allow loose insertion from the distal end side of the block. a plurality of outer pressure springs that are brought into contact with the inner peripheral surface of one of the connected cylindrical connecting conductors; a plurality of axially long inner contact pieces attached to a surface; and a tip end of each of the inner contact pieces provided at the base of the block is biased inwardly from the base side of the block. A connection device comprising a plurality of inner pressure springs brought into contact with the outer peripheral surface of the other loosely inserted cylindrical connection conductor.