A bridge contact riveting fixture for frame circuit breaker and assembly operation method thereof

Abstract

The present invention relates to a riveting fixture, and in particular to an assembly operation method of a bridge contact riveting fixture for a frame circuit breaker. The fixture comprises a bridge contact and a bottom plate, wherein the upper part of the bottom plate is provided with two clamping devices which are spaced apart from each other, wherein the clamping device is provided with a detachable and fixed bridge contact, and a punch riveting device is provided between the two clamping devices, wherein the punch riveting device synchronously controls the two clamping devices. The riveting speed is fast and the efficiency is high.

Description

Technical Field

[0001] The invention relates to a riveting fixture, in particular to an assembly operation method of a bridge contact riveting fixture of a frame circuit breaker. Background Art

[0002] The main function of the bridge contact of the frame circuit breaker is to quickly connect or separate the circuit breaker body and the conductor of the drawer seat. It is suitable for quickly pulling out from the drawer seat when the body fails, which is convenient for maintenance. The commonly used bridge contact structure mainly consists of: a spacer, a spring, a small shaft, a contact, a bracket, and a pin. The two ends of the spring are hooked on the small shaft in the semicircular arc outside the contacts on both sides. A groove is provided in the middle of the small shaft so that the hooks at both ends of the spring can hook. The traditional riveting method of the bridge contact of the frame circuit breaker is to use a cone surface to press against the end hole of the bridge contact pin, and manually hammer to expand the pin to achieve the purpose of riveting. This method, due to uneven manual force, often rivets the contact and pin of the bridge contact, so that the two cannot rotate flexibly, and the pin end is also riveted and cracked, making the workpiece scrapped; on the other hand, the labor intensity of manual riveting workers is high and the riveting speed is slow, which often cannot meet the requirements of production progress. Summary of the invention

[0003] The present invention mainly solves the deficiencies in the prior art and provides a frame circuit breaker bridge contact riveting fixture and an assembly operation method thereof to solve the problems of inaccurate assembly and easy formation of scrapped parts.

[0004] The above technical problems of the present invention are mainly solved by the following technical solutions:

[0005] A bridge contact riveting fixture for a frame circuit breaker comprises a bridge contact and a base plate. Two spaced-apart clamping devices are arranged on the upper part of the base plate. A detachable and fixed bridge contact is arranged in the clamping device. A punch riveting device is arranged between the two clamping devices. The punch riveting device synchronously controls the two clamping devices.

[0006] Preferably, the clamping device comprises a support and a support seat arranged on the bottom plate, the support and the support seat are distributed in an interval manner, a fixed top is arranged in the support, a movable top is arranged in the support seat, and the bridge-shaped contact is arranged between the fixed top and the movable top;

[0007] The punch riveting device comprises a movable block, the movable block is displaced downward by the punch, and the punch drives the movable tip to rivet with the bridge-shaped contact.

[0008] Preferably, the movable top is movably connected to the support seat, a rotatable fork is provided at the upper end of the support seat, the lower end of the fork is sleeved and fixed to the outer end of the movable top, the fork drives the movable top to move left and right along the support seat, and a spring is elastically connected between the large flange in the middle of the movable top and the countersunk hole of the support seat;

[0009] A pair of longitudinally distributed guide seats are provided in the base plate, and the two side walls of the movable block are displaced along the guide seats through the bosses. Inclined surfaces are provided on both sides of the movable block, and a ball head that moves tangentially with the inclined surfaces is provided at the rear end of the movable top. A reset spring is provided between the bottom of the movable block and the base plate.

[0010] Preferably, the shift fork is fixed to the upper end of the support seat by an axle pin, and the axle pin is retained in place by an axle stopper. An elastic pin serving as a stop is provided in the rear end of the movable top, and the two fork legs of the shift fork ride on the outer circle of the step of the movable top.

[0011] Preferably, the support and the base plate, and the support seat and the base plate are fixed by bolts respectively, and the outer wall of the support and the base plate are supported by reinforcing ribs.

[0012] An assembly operation method of a bridge contact riveting fixture for a frame circuit breaker is performed in the following steps:

[0013] ①. First place the fixture on the bench punch press, press the bottom plate of the fixture with a pressing plate, fix the fixture, and align the punch with the slider of the punch press;

[0014] ②. Install the left bridge contact into the fixture, drive the left fork, make the two movable top compression springs on the left slide to the right along the support seat hole, install the assembled bridge contact into the fixture, make the holes at both ends of the bridge contact pin correspond to the conical surfaces of the fixed top and the movable top respectively, and release the fork;

[0015] ③. Install the right bridge-shaped contact into the fixture in the same way as above;

[0016] ④. Riveting: Start the punch press, the punch slide falls and presses the punch, so that the movable block slides downward along the guide seat groove, and the inclined surface presses the ball head, so that the left and right movable tops press the bridge contact pins on both sides, thereby completing the riveting of the bridge contact 4;

[0017] ⑤. Remove the left and right bridge contacts.

[0018] The fixed tops at the left and right ends are fixed to the support through washers and nuts, the support is fixed to the bottom plate, and the reinforcing ribs are fixed to the bottom plate and the support through screws, and play a reinforcing role on the support. The support seat is fixed to the bottom plate, the movable top is slidably matched with the support seat hole, and a fork is provided at its front end, and the two fork legs of the fork straddle the outer circle of the step of the movable top, a spring is provided between the large flange in the middle of the movable top and the countersunk hole of the support seat, and an elastic pin is provided at the rear of the movable top, and the function of the elastic pin is to prevent the movable top from escaping from the support seat hole, and a ball head is provided at the rear end of the movable top, and inclined surfaces are provided on both sides of the movable block, which are tangent to the ball heads of the movable tops on both sides, respectively, and a punch is provided on the upper part of the movable block, and the two are fixedly connected by welding, and two reset springs are provided at the lower part of the movable block, and bosses c are provided at the front and rear of the movable block, which cooperate with the guide seat groove so that the movable block can only slide up and down along the groove, and the whole fixture is placed on the table punching machine when working, and the bottom plate is pressed by a pressing plate to fix the fixture, and the punch is aligned with the slider of the punching machine. When working, first adjust the height of the punch slide to ensure the quality of the bridge contact after riveting (that is, the contact can rotate relative to the pin, but the contact cannot be disengaged from the pin); manually drive the left pull fork to rotate around the shaft pin, driving the two active top compression springs to slide to the right along the support seat hole; put the assembled bridge contact into the fixture, so that the holes at both ends of the two pins correspond to the conical surfaces of the fixed top and the active top, respectively, and release the pull fork; install the right bridge contact into the fixture in the same way. Start the punch, so that the slide impacts the punch downward, the active block slides downward along the guide block groove, and the inclined surface b presses the ball head a, so that the active top presses against the pin, thereby completing the riveting of the bridge contact.

[0019] advantage:

[0020] 1) Two bridge-shaped contacts can be riveted at the same time, with fast riveting speed and high efficiency.

[0021] 2) After the height of the punch press slider is adjusted, the deformation at both ends of the bridge-shaped contact pin is almost the same each time the riveting is performed, and the riveting quality is well controlled.

[0022] 3) The fixtures are arranged symmetrically, with good force bearing and durability.

[0023] The bridge-shaped contacts are riveted with this fixture, which eliminates the need for manual hammering and has good riveting consistency. The riveting quality fully meets the technical requirements and the riveting speed is fast, so it is deeply loved by the riveting workers in the workshop.

[0024] The invention provides a frame circuit breaker bridge contact riveting fixture and an assembly operation method thereof, which improves assembly accuracy and enhances product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 yes Figure 2 AA cross-sectional structural diagram;

[0026] Figure 2 It is a schematic diagram of the structure of the present invention;

[0027] Figure 3 yes Figure 1 Schematic diagram of the BB cross-section structure. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0029] Embodiment 1: As shown in the figure, a bridge contact riveting fixture for a frame circuit breaker includes a bridge contact 1 and a base plate 2. Two clamping devices spaced apart from each other are provided on the upper portion of the base plate 2. A detachable and fixed bridge contact 1 is provided in the clamping device. A punch riveting device is provided between the two clamping devices. The punch riveting device synchronously controls the two clamping devices.

[0030] Preferably, the clamping device comprises a support 3 and a support seat 4 arranged on the bottom plate 1, the support 3 and the support seat 4 are distributed in an interval manner, a fixed top 5 is provided in the support 4, a movable top 6 is provided in the support seat 4, and the bridge contact 1 is arranged between the fixed top 5 and the movable top 6;

[0031] The punch riveting device comprises a movable block 7 , and the movable block 7 is displaced downward by a punch 8 , and the punch 8 drives the movable tip 6 to rivet with the bridge contact 1 .

[0032] Preferably, the movable top 6 is movably connected to the support seat 4, a rotatable fork 9 is provided at the upper end of the support seat 4, the lower end of the fork 9 is sleeved and fixed to the outer end of the movable top 6, the fork 9 drives the movable top 6 to move left and right along the support seat 4, and a spring 10 is elastically connected between the large flange in the middle of the movable top 6 and the countersunk hole of the support seat 4;

[0033] A pair of longitudinally distributed guide seats 11 are provided in the base plate 2, and the two side walls of the movable block 7 are displaced along the guide seats 11 through the boss c. Inclined surfaces b are provided on both sides of the movable block 7, and a ball head c that moves tangentially with the inclined surface b is provided at the rear end of the movable top 6. A reset spring 14 is provided between the bottom of the movable block 7 and the base plate 2.

[0034] Preferably, the shift fork 9 is fixed to the upper end of the support seat 4 by an axle pin 15, and the axle pin 15 is retained by an axle stopper 16. An elastic pin 17 serving as a stop is provided at the rear end of the movable top 6, and the two fork legs of the shift fork 9 ride on the outer circle of the step of the movable top 6.

[0035] Preferably, the support 3 and the base plate 2 , and the support seat 4 and the base plate 2 are fixed by bolts 18 , respectively, and the outer wall of the support 3 and the base plate 2 are supported by reinforcing ribs 19 .

[0036] An assembly operation method of a bridge contact riveting fixture for a frame circuit breaker is performed in the following steps:

[0037] ①. First place the fixture on the bench punch press, press the bottom plate of the fixture with a pressing plate, fix the fixture, and align the punch with the slider of the punch press;

[0038] ②. Install the left bridge contact into the fixture, drive the left fork, make the two movable top compression springs on the left slide to the right along the support seat hole, install the assembled bridge contact into the fixture, make the holes at both ends of the bridge contact pin correspond to the conical surfaces of the fixed top and the movable top respectively, and release the fork;

[0039] ③. Install the right bridge-shaped contact into the fixture in the same way as above;

[0040] ④. Riveting: Start the punch press, the punch slide falls to press the punch, so that the movable block slides downward along the guide seat groove, and the inclined surface (b) presses the ball head (a), so that the left and right movable tops press the bridge contact pins on both sides, thereby completing the riveting of the bridge contact;

[0041] ⑤. Remove the left and right bridge contacts.

Claims

1. A bridge contact riveting fixture for a frame circuit breaker, comprising a bridge contact (1), characterized in that: It also comprises a bottom plate (2), wherein the upper part of the bottom plate (2) is provided with two spaced-apart clamping devices, wherein the clamping devices are provided with a detachably fixed bridge-shaped contact (1), and a punch riveting device is provided between the two clamping devices, wherein the punch riveting device synchronously controls the two clamping devices; The clamping device comprises a support (3) and a support seat (4) arranged on a bottom plate (2); the support (3) and the support seat (4) are arranged in an interval manner; a fixed top (5) is arranged in the support (4); a movable top (6) is arranged in the support seat (4); and the bridge contact (1) is arranged between the fixed top (5) and the movable top (6); The punch riveting device comprises a movable block (7), the movable block (7) is displaced downward by the punch (8), and the movable block (7) drives the movable tip (6) to be riveted with the bridge contact (1); The movable top (6) is movably connected to the support seat (4); a rotatable fork (9) is provided at the upper end of the support seat (4); the lower end of the fork (9) is sleeved and fixed to the outer end of the movable top (6); the fork (9) drives the movable top (6) to move left and right along the support seat (4); a spring (10) is elastically connected between the large flange in the middle of the movable top (6) and the countersunk hole of the support seat (4); A pair of longitudinally distributed guide seats (11) are provided in the bottom plate (2); the two side walls of the movable block (7) are displaced along the guide seats (11) via bosses (c); inclined surfaces (b) are provided on both sides of the movable block (7); a ball head (a) is provided at the rear end of the movable top (6) and moves tangentially with the inclined surface (b); and a return spring (14) is provided between the bottom of the movable block (7) and the bottom plate (2); The shift fork (9) is fixed to the upper end of the support seat (4) through an axle pin (15), and the axle pin (15) is fixed by an axle stopper (16). An elastic pin (17) having a stop function is provided at the rear end of the movable top (6), and two fork legs of the shift fork (9) ride on the outer circle of the step of the movable top (6). The support (3) and the bottom plate (2), and the support seat (4) and the bottom plate (2) are fixed respectively by bolts (18), and the outer wall of the support (3) and the bottom plate (2) are supported by reinforcing ribs (19); The assembly operation is carried out in the following steps: ①. First place the fixture on the bench punch press, press the bottom plate of the fixture with a pressing plate, fix the fixture, and align the punch with the slider of the punch press; ②. Install the left bridge contact into the fixture, drive the left fork, make the two movable top compression springs on the left slide to the right along the support seat hole, install the assembled bridge contact into the fixture, make the holes at both ends of the bridge contact pin correspond to the conical surfaces of the fixed top and the movable top respectively, and release the fork; ③. Install the right bridge-shaped contact into the fixture in the same way as above; ④. Riveting: Start the punch press, the punch slide falls to press the punch, so that the movable block slides downward along the guide seat groove, and the inclined surface (b) presses the ball head (a), so that the left and right movable tops press the bridge contact pins on both sides, thereby completing the riveting of the bridge contact; ⑤. Remove the left and right bridge contacts.

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