JPH06290Y2 - Arm type circuit breaker - Google Patents

Description

[Detailed Description of the Invention] "Industrial application field" The present invention relates to an armor type circuit breaker in which the base end of the armor bar is pivotally supported and tilted to temporarily close the crossing. The present invention relates to a structure in which a blocking position angle adjusting mechanism of a arm is provided near the arm on the power transmission path for driving the arm up and down.

"Prior art" The armor-type circuit breaker stops and holds the armor in either a horizontal position where the base end of the armor arm is pivoted to swing to close the traverse or an open position where the armrest is lifted up. To do. Since the horizontal position control of the brace is stopped statically by a constant braking force after the motor circuit is cut off, it is difficult to finely adjust the horizontal position only by the motor controller. If the arms are not leveled by controlling them to a horizontal position, it will be very unsightly and the impression that the crossroads are closed will be weakened.Therefore, make sure that the arms are level during installation or when replacing the arms. Generally, an angle adjusting mechanism is provided in the.

As for the structure of the arms, if the crossing is narrow, a small breaker with a short arm may be used, and the arms may simply be swung. In a large circuit breaker used for a wide crossing, the arms are long, so if you keep swinging it, the ends of the arms will jump up high and not only will not be stable, but it will also interfere with other level crossings and overhead lines. There is a risk that the arms are often broken.

Since the armor of the compact circuit breaker is light, it is constructed as a cantilever type with one bar as a whole, and the angle adjustment mechanism that provides the levelness is sufficient if only one arm is targeted. A relatively simple structure such as an angle adjustment with a support member can be made, and various proposals have been made in the past.

Since the armor of a large-sized circuit breaker becomes slender, it has two parts, and the base part has two arms and the swing box is projected to both sides from the support box with the drive part. It is common that the bases of are solidified.

"Problems to be solved by the invention" When the angle fine adjustment mechanism having the same structure as the small circuit breaker is applied to the large circuit breaker, each of the two forked bases must be adjusted separately. Since it is necessary to balance the two adjustment conditions, there is a problem that it is extremely complicated and the workability is poor.

The present invention has been made by paying attention to such a conventional problem, and it is possible to finely adjust the angle integrally even if it is branched to the base 2 of the arm and is suitable for a large circuit breaker. It is an object of the present invention to provide a blocking position angle adjusting mechanism of a armor type circuit breaker which can be applied to a small circuit breaker having a single arm base.

[Means for Solving the Problems] The gist of the present invention for achieving the above object is to provide a wristwatch type circuit breaker having an angle adjusting mechanism (50) at a shutoff position, in which an angle fine adjusting mechanism ( 50) is provided near the arm (20) side of the power transmission path that drives the arm (20) to move up and down, and has a power-side rotating member (51) and a arm (20) side rotating member (55). ), A swing arm (52, 57) extending substantially in the radial direction from both rotating members (51, 55), and an adjustment provided at the tip of both swing arms (52, 57). Eyebolt (60), connecting member (59), and a pair of nuts (63, 64), and a rotating member (51, 55) on the power side and a rotating member on the arm (20) side. (51, 55) are loosely fitted to each other and combined with each other on the same central axis. 52, 57) has its distal end portion faces along the circumference of the same central axis, one of the swing arms (52,
57) is connected to the head of the adjustment eyebolt (60), and the bolt portion of the adjustment eyebolt (60) is inserted into the tip of the other swing arm (52, 57). (59) is the other swing arm (52, 57)
The adjustment eyebolt (60) is retained by the distal end portion of the adjustment eyebolt, and the bolt portion of the adjustment eyebolt (60) is loosely inserted and inserted, and the pair of nuts (63, 64) are screwed into the adjustment eyebolt (60) bolt portion. (63, 64) expands and contracts the distance between the tip ends of both swing arms (52, 57) when rotated, and changes the angle formed by the swing arm (52, 57) to reach the final blocking position. To finely adjust the
It exists in the armor type circuit breaker for preventing displacement of the position caused by loosening by tightening the connecting member (59).

"Operation" Therefore, the arms are slightly swung by the relative position of the swing arm of the power-side rotating member and the swing-side rotating member that is integrally connected via the eyebolt.

By loosening one step of the pair of nuts holding the connecting member of the swinging arm through which the adjusting eyebolt is inserted and tightening the other relatively, the eyebolt moves in the axial direction with respect to the connecting member, and the two rotating members As the distance between the tip ends of the swing arms changes and the arm member-side pivot member rotates relative to the drive-side pivot member, the arm arm angle changes and the arm arm interception position angle is changed. It can be fine-tuned.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

Each drawing shows an embodiment of the present invention.

As shown in FIG. 7 and FIG.
Is the base of the armor 20 that blocks the crossing A
0 is supported so that it can be tilted.

The arm 20 is supported by a connecting pin 23 provided on a connecting metal fitting of the main rods 22 and 22 of the base which is a bifurcated branch of the single rod 21 at the tip end so that it can be bent, and the single rod 21 is provided between the main rods 22 and 22. The link rod 24 is provided to regulate the bending angle of the. The bases of the main rods 22 and 22 are respectively fixed to the output shafts 32 and 32 which project from the outer box 31 of the breaker main body 30 to both sides and swing. Balance weights 22a and 22a are attached to the ends of the bases of the main rods 22 and 22, respectively.

As the single rod 21, a light weight pipe such as a bamboo rod or a resin pipe is used. Although the main rod 22 is thicker than the single rod 21, a high-strength lightweight pipe is similarly used.

The link rod 24 is erected so as to be connected to a tip 25 of a projecting rod fixed to the base of the single rod 21 and a connecting shaft 33 of a connecting bracket projecting above the outer box 31 of the breaker body 30. A length adjusting screw portion 24a is provided in the middle portion of the link rod 24.

Main rod 22, link rod 24, protruding rod tip 25, and outer box 31
The output shaft 32 and the connecting shaft 33 of the connecting bracket are connected to each other to form a parallelogram link, and as shown in FIG. 9, when the arm 20 is raised, the single rod 21 maintains a horizontal posture. ing.

The outer box 31 of the main body 30 of the circuit breaker incorporates a drive mechanism 30a as shown in FIG.

That is, the drive mechanism 30a includes the electric motor 3 as a power source.
4, a reduction mechanism 35, a relay shaft member 40, and the output shaft 32.

The reduction mechanism 35 has a first reduction gear 35a integrally having a large gear and a small gear meshing with the output gear 34a of the electric motor 34, and a large gear and a small gear meshing with the small gear of the first reduction gear 35a. Second reduction gear 35b
And a large gear 36 that meshes with the small gear of the second reduction gear 35b.
and a final reduction gear 36 having a.

The final reduction gear 36 has a small gear 36b and a gear 36c, which are output gears of the reduction mechanism 35, and a gear 37a fixed to the controller shaft 37 meshes with the gear 36c.
Contact portions 37e on the cams 37b, 37c ...
Are in sliding contact with each other.

A fine angle adjustment mechanism 50 for the arm 20 is provided on a relay shaft member 40 that is arranged near the end of the drive mechanism 30a and at a later stage of the reduction mechanism 35. A bevel gear 41 is fixedly attached to the end of the relay shaft member 40, and as shown in FIG.
The bevel gear 41 meshes with the bevel gear 32a fixed to the. Joints 32b, 32b fixed to both ends of the output shaft 32
The bases of the main rods 22 and 22 of the arm 20 are fixed to each other.

Around the relay shaft member 40, which is the terminal end of the drive mechanism 30a,
The details of the fine angle adjustment mechanism 50 will be described below.
As shown in FIGS. 12, 13 and 14, the relay shaft member 4
Reference numeral 0 has a round shaft portion 42 and lap line portions 43 and 44, and the bevel gear 41 is fitted to the spline portion 44.

The base portion of the first arm member 51 is fitted to the spline portion 43 of the relay shaft member 40 so as to rotate integrally with the bevel gear 41. The first arm member 51 constitutes the angle fine adjustment mechanism 50 and is a rotating member on the side of the arm 20. A swing arm 52 extends in the radial direction from the base of the first arm member 51.

As can be seen in FIG. 1, FIG. 2, FIG. 10, and FIG.
The base cylinder portion 57 of the second arm member 55 is rotatably fitted to the round shaft portion 42 of the relay shaft member 40. The second arm member 55 constitutes the angle fine adjustment mechanism 50 and is a rotating member on the power side, and the first arm member 51 from the base cylinder portion 56.
The swing arm 57 corresponding to the swing arm 52 is extended in the radial direction.

The base tube portion 56 of the second arm member 55 has a spline portion 56.
a and a shaft portion 56b are provided, the fan gear 45 is fitted to the spline portion 56a, and the stopper member 46 is loosely fitted to the shaft portion 56b.

The sector gear 45 meshes with the small gear 36b of the final reduction gear 36 of the reduction mechanism 35, and stopper pieces 45a and 45b are fixedly provided on the side edges. One end of the stopper member 46 is supported by the outer box 31 of the breaker body 30 via a buffer spring member 47.
A receiver 46a having a receiving surface facing the stopper pieces 45a and 45b of the sector gear 45 is fixed.

The swing arms 52 and 57 of the first arm member 51 and the second arm member 55 that form the angle fine adjustment mechanism 50 face each other, and as shown in FIGS.
An adjustment eyebolt 60 is installed between the tip of the second arm 2 and the tip of the swing arm 57 in the tangential direction of the relay shaft member 40.

As shown in FIGS. 1 to 3 and 5, a head 61 of the adjusting eyebolt 60 holds a bearing 61 a, and a bolt portion 62 extends from the head 61. The bearing 61a of the head 61 is fixed to the head 53 of the swing arm 52 of the first arm member 51 via the pin bolt 54, and the head 61 of the adjusting eyebolt 60 is the bearing 61a.
It is rotatably connected to the head 53 of the swing arm 52 of the first arm member 51 via a.

As can be seen from FIGS. 1 to 4, the head 58 of the swing arm 57 of the second arm member 55 is provided with counterbores 58a, 58a from both sides in the axial direction of the adjusting eyebolt 60 in the middle wall 58b.
A connecting pin 59 is rotatably fitted into the intermediate wall 58b in a direction orthogonal to the bolt portion 62 of the adjusting eyebolt 60. The side portion of the connecting pin 59 projects outward from the intermediate wall 58b of the head portion 58 of the swing arm 57,
The projecting portions are chamfered to form receiving surfaces 59a, 59a, and an insertion hole 59b for a bolt portion 62 of the adjusting eyebolt 60 is formed in the central portion of the connecting pin 59.

The connecting pin 59 is a swing arm 57 and an adjusting eyebolt 60.
And a connecting member that allows angular displacement with respect to.

The head portion 61 is connected to the head portion 53 of the swing arm 52 of the first arm member 51.
2 extends to the side opposite to the insertion hole 59b of the connecting pin 59 mounted on the head portion 58 of the swing arm 57 of the second arm member 55. The bolt 62 has a pair of nuts 6 for holding the chamfered receiving surfaces 59a, 59a of the connecting pin 59 of the head 58 of the swing arm 57 of the second arm member 55.
3, 64 are screwed together.

Next, the operation will be described.

The electric motor 34 can rotate both forward and backward. When the electric motor 34 is rotated, it is decelerated from the output gear 34a by the first reduction gear 36a, the second reduction gear 35b, and the final reduction gear 36 of the reduction mechanism 35, and the small gear 36b to the fan gear 4 are rotated.
The rotational force is transmitted to 5. The rotational force transmitted to the sector gear 45 is transmitted to the second arm member 55 via the spline portion 56a.
Of the swing arm 57 and its head 5
8, adjusting eyebolt 60, head 53 to swing arm 5
2, transmitted to the first arm member 51, the spline portion 43
This causes the relay shaft member 40 to rotate.

The bevel gear 41 is rotated by the rotation of the relay shaft member 40, and the output shaft 32 is rotated by the bevel gear 32a meshed with the bevel gear 41,
Both main rods 22, 22 of the arm 20 by the joints 32b, 32b
Will fall. When the main rod 22 is tilted, the single rod 21 bends around the connecting pin 23 and moves up and down in a substantially parallel posture by the action of the substantially parallelogram link along the main rod 22.

Depending on how the electric motor 34 rotates forward and backward, the main rods 22, 2
When 2 is laid down and the single rod 21 and the main rod 22 are laid down in a straight line, the crossroad A is closed as shown in FIGS. 7 and 8. The state in which the arm 20 is tilted is detected by the controller shaft 37, and the position in which the arm 20 is tilted is controlled by the positional relationship between the cams 37b, 37c ... And the contact portion 37e.

The stopper pieces 45a and 45b are the receiving members 4 of the stopper member 46.
It is assumed that the arm 6 is brought into contact with the armature 6a only when an abnormal external force is applied to the arm 20 and is normally controlled by the contact portion 37e, and is stopped before contact with the predetermined braking force after the motor circuit is cut off.

The single rod 21 and the main rod 22 of the armature 20 are aligned in a straight line and become horizontal to close the crossroad A. However, the armrest 20 is stopped at the desired horizontal position during installation by only the contact portion 37e. Adjustment is difficult because of its structure,
For example, as shown in Fig. 9, slightly before the desired position (1 ° ~
If the connecting pin 23 is stopped at the position a of 4 °), the speed reduction mechanism 35 is in a restrained state in order to adjust the angle of the positional deviation beyond this, so the nut 64 is loosened in the angle fine adjustment mechanism 50. Fine adjustment is performed by tightening with the nut 63 and advancing the head 58 of the swing arm 57 so as to approach the head 53 of the swing arm 52. On the contrary, at the position a ′ slightly over the desired position, the connecting pin 23 Is stopped, the nut 63 is loosened, and the nut 64 is adjusted so that the distance between the head portions 58 and 53 of the two swing arms 57 and 52 can be widened. As a result, the connecting pin 59
The receiving surface 59a is pushed and moves relative to the bolt portion 62 of the adjusting eyebolt 60. Therefore, the head portion 58 of the swing arm 57 also includes the bolt portion 6 of the adjusting eyebolt 60.
Move relative to 2.

Since the fan-shaped gear 45 is restrained, the second arm member 5
5. The swing arm 57 is also constrained to stop at that position, and as a result of the head 58 of the swing arm 57 moving relative to the bolt portion 62 of the adjustment eyebolt 60, the swing arm 57 is stopped. The relay shaft member 40 is rotated with respect to the moving arm 57 and the second arm member 55, and the bevel gear 41 is further rotated.

When the bevel gear 41 rotates, the bevel gear 32a rotates, the output shaft 32 rotates, and the joints 32b and 32b rotate the bases of the main rods 22 and 22 of the arm 20. The rotation of the main rods 22 and 22 can be adjusted in any direction by raising and lowering the nuts 63 and 64. When the position is determined, the nut 6
The loosened one of the parts 3 and 64 is returned to the opposite side and tightened, and the connecting pin 59 is clamped and fixed between the nuts 63 and 64.

The angular displacement with the adjusting eyebolt 60 due to the relative angle change of the swing arms 52 and 57 is absorbed by the angular displacement between the bearing 61a of the head 61 of the adjusting eyebolt 60 and the connecting pin 59 on the bolt side. .

As described above, it is possible to easily adjust the degree of inversion of the arm 20 at the blocking position simply by operating the nuts 63 and 64 screwed into the bolt portion 62 of the adjusting eyebolt 60 at one location.

[Advantage of Device] According to the armor type circuit breaker according to the present invention, even if the circuit breaker has a large armor, it is possible to extremely finely adjust the angle of the circuit break position at one place, and the workability is improved. The arms can be quickly brought into good condition, and maintenance can be carried out easily to keep the breaker in good condition. It is also effective when applied to small breakers.

[Brief description of drawings]

Each drawing shows one embodiment of the present invention. FIG. 1 is a longitudinal sectional view of a drive mechanism having an angle adjusting mechanism, and FIG. 2 is FIG. 1 II.
-II line sectional view, FIG. 3 is a longitudinal sectional view of an essential part of the angle adjusting mechanism in the vicinity of the adjusting eyebolt, FIG. 4 is a view taken in the direction of arrow IV in FIG. 3, and FIG. 6 is a sectional view taken along the line, FIG. 6 is FIG.
VI-VI line sectional view, FIG. 7 is a front view of the circuit breaker in a closed state,
8 is a plan view of the same, FIG. 9 is a front view of the circuit breaker in an open state, FIG. 10 is a front view of a combination of a fan gear and a second arm member, and FIG. 11 is FIG. 10 XI-XI. A line sectional view, FIG. 12 is a longitudinal sectional view of a combination of the relay shaft member and the first arm member, and FIG. 13 is FIG. 12 XIII-XIII.
It is a line sectional view. 10 ... Armor type circuit breaker 20 ... Armor 21 ... Single rod 22 ... Main rod 30 ... Circuit breaker main body 31 ... Outer box 32 ... Output shaft 34 ... Electric motor 35 ... Reduction mechanism 36 ... Final reduction gear 40 ... Relay shaft member 45 ... Fan gear 50 ... Angle fine adjustment mechanism 51 ... First arm member 52 ... Oscillating arm 53 ... Head 55 ... Second arm member 56 ... Base cylinder 57 ... Oscillating arm 58 ... Head 59 ... Connecting pin 60 ... Adjustment Eyebolt 61 ... Head 62 ... Bolt

Claims (1)

[Scope of utility model registration request] 1. A wristwatch-type circuit breaker having an angle adjusting mechanism (50) at a shutoff position, wherein the angle fine adjusting mechanism (50) is a wristwatch (20) in a power voltage path for driving the armrest (20) up and down. Is provided in the vicinity of the rotation side (51), the rotation member (51) on the power side, the rotation member (55) on the armrest (20) side, and the rotation members (51, 55) extending substantially in the radial direction. Swinging arms (52, 57), adjusting eye bolts (60) arranged at the tip of both swinging arms (52, 57), a connecting member (59), and one nut (63, 64). ), The rotating member (51, 55) on the power side and the rotating member (51, 55) on the armrest (20) are loosely fitted to each other and combined with the same central axis. Yes, both swing arms (52, 57) have their tips facing each other along the circumference of the same central axis, and one swing arm (52, 57) Over arm (52,
57) is connected to the head of the adjusting eyebolt (60), and the bolt portion of the adjusting eyebolt (60) is also inserted into the other swinging arm (52, 57). (59) is the other swing arm (52, 57)
The adjustment eyebolt (60) is held by the tip of the adjustment eyebolt (60) by loosely fitting it, and the nuts (63, 64) are screwed into the adjustment eyebolt (60). (63, 64) expands / contracts the distance between the tips of the swinging arms (52, 57) when rotated, and changes the angle formed by the swinging arms (52, 57) to change the angle formed by the cut-off position angle of the armrest (20). To finely adjust the
A cross-type circuit breaker for tightening the connecting member (59) to prevent displacement of the position caused by loosening.