A molded case circuit breaker moving contact and rotating shaft assembly fixture and assembly method

Abstract

The present invention discloses a molded case circuit breaker moving contact and shaft assembly fixture and assembly method, including a molded case circuit breaker, a base plate, a sliding fixed block, a vertical plate and a fixed pressure device, wherein the vertical plate is fixedly mounted on the base plate, a sliding guide rail is provided on the upper portion of the vertical plate, the sliding fixed block is mounted on the sliding guide rail and can slide along the sliding guide rail, the molded case circuit breaker is mounted in a groove of the sliding fixed block, the fixed pressure device is fixedly mounted on the base plate and faces the assembly surface of the molded case circuit breaker, the fixed pressure device comprises a manual pressure clamp, a pressure clamp fixing plate, a guide column, a guide block and a linear guide rail, the linear guide rail is fixedly mounted on the base plate, the guide block is connected to the linear guide rail, one end of the guide column is fixedly connected to the guide block, the other end of the guide column is fixedly connected to the pressure clamp fixing plate, and the manual pressure clamp is fixedly mounted on the pressure clamp fixing plate. The shaft assembly of the present invention is completed at one time, which greatly improves assembly efficiency and assembly accuracy and reduces labor intensity.

Description

Technical Field

[0001] The invention belongs to the field of assembly tools, and in particular relates to an assembly fixture and an assembly method for a moving contact and a rotating shaft of a molded case circuit breaker. Background Art

[0002] The existing molded case circuit breaker structure is as follows Figure 2 As shown, the assembly of the moving contact and the rotating shaft of the molded case circuit breaker of this structure is relatively complicated, and the existing tooling cannot be used. In addition, the main spring has a very strong force and cannot be pressed by hand, and cannot be assembled without a tooling fixture. Summary of the invention

[0003] The object of the present invention is to provide a clamp and an assembly method, which can easily press the main spring and can perform operations such as withdrawing the clamp and replacing the molded case circuit breaker according to the structure of the molded case circuit breaker.

[0004] In order to solve the above problems, the present invention provides a molded case circuit breaker moving contact and rotating shaft assembly fixture, including a molded case circuit breaker, a base plate, a sliding fixed block, a vertical plate and a fixing device, the vertical plate is fixedly installed on the base plate, a sliding guide rail is provided on the upper part of the vertical plate, the sliding fixed block is installed on the sliding guide rail and can slide along the sliding guide rail, the molded case circuit breaker is installed in the groove of the sliding fixed block, and the fixing device is fixedly installed on the base plate and faces the assembly surface of the molded case circuit breaker.

[0005] Furthermore, the fixed pressing device includes a manual pressing clamp, a pressing clamp fixing plate, a guide column, a guide block and a linear guide rail, the linear guide rail is fixedly mounted on the base plate, the guide block is connected to the linear guide rail, one end of the guide column is fixedly connected to the guide block, the other end of the guide column is fixedly connected to the pressing clamp fixing plate, and the manual pressing clamp is fixedly mounted on the pressing clamp fixing plate.

[0006] Furthermore, the vertical plate is provided with a spring top screw installation hole, a spring top screw is installed in the spring top screw installation hole, the sliding fixed block is provided with a spring top screw groove, the spring top screw groove corresponds to the position of the spring top screw installation hole, and when the sliding fixed block moves to the assembly position, the top screw head of the spring top screw falls into the spring top screw groove.

[0007] Furthermore, a pressure claw is provided at the end of the manual pressure clamp, and the molded case circuit breaker includes a main spring and a pressure spring plate. The pressure spring plate is located on the upper part of the main spring, and positioning blocks are provided on both sides of the pressure spring plate. The shape of the positioning blocks is consistent with the shape of the claw mouth of the pressure claw.

[0008] Furthermore, the fixing and pressing device also includes a flange seat and a padding plate, the lower part of the guide column is fixedly connected to the flange seat, the flange seat is screwed to the padding plate, and the padding plate is screwed to the guide block.

[0009] Furthermore, the number of sections of the sliding fixed block is not less than 3, the number of the spring top screw grooves is the same as the number of sections of the sliding fixed block, and each spring top screw groove is located at the same position of each section of the sliding fixed block.

[0010] Furthermore, the molded case circuit breaker also includes a rotating shaft and a moving contact, and a semicircular positioning block for positioning the rotating shaft is provided between the two sliding fixed blocks.

[0011] Furthermore, the number of the guide columns and the flange seats is not less than 2, and the number of the pad plates, guide blocks and linear guide rails is 1 or 2.

[0012] The present invention also provides a method for assembling a moving contact and a rotating shaft of a molded case circuit breaker, comprising the following steps:

[0013] A. Install the components of the molded case circuit breaker in the grooves of the sliding fixed block step by step, and move the sliding fixed block to the assembly position. At this time, the top screw head of the spring top screw falls into the spring top screw groove and clamps the sliding fixed block;

[0014] B. Move the manual pressing pliers to press down. The pressing claws press down the positioning block on the compression spring plate and compress the main spring downward. Now you can install the moving contact and other parts.

[0015] C. After the installation is completed, push the pressure claw upward, push the fixing device to make it withdraw along the linear guide rail, unscrew the spring top screw, and complete the assembly of the one-phase molded case circuit breaker;

[0016] D. Repeat the above steps until all molded case circuit breakers are assembled.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. According to the characteristics of molded case circuit breakers, special tooling is designed to improve the accuracy and efficiency of assembly.

[0019] 2. Use tools such as pressing pliers and pressing claws to compress the main spring, which reduces the labor intensity of operators.

[0020] 3. Design spring top screw installation holes and spring top screw grooves, and use spring top screw positioning to ensure the assembly position of the molded case circuit breaker, further improving the assembly accuracy and efficiency.

[0021] 4. The design benefit of the fixed pressure device is to apply pressure to the main spring to compress the main spring, so that the assembly can proceed smoothly. When the assembly is completed, the upper part of the pressure claw is blocked by parts, so a linear guide is designed to allow the pressure claw to retreat and then exit the molded case circuit breaker.

[0022] 5. The shape of the pressure claw matches that of the positioning block. The purpose of this design is to further accurately position the molded case circuit breaker and ensure balanced pressure at both ends of the compression spring plate.

[0023] 6. The advantage of the semicircular positioning block design is that it can not only separate the two molded case circuit breakers, but also support the molded case circuit breakers according to the shape of the molded case circuit breakers, thereby further improving the assembly accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the fixture for assembling the moving contact and the rotating shaft of the molded case circuit breaker;

[0025] Figure 2 It is a schematic diagram of the structure of a molded case circuit breaker;

[0026] Figure 3 It is a schematic diagram of the pressure claw;

[0027] Figure 4 It is a schematic diagram of a semicircular positioning block;

[0028] Figure 5 It is a schematic diagram of the structure of the sliding fixed block;

[0029] Figure 6 It is a schematic diagram of the vertical plate;

[0030] As shown in the figure: 1-molded case circuit breaker; 2-bottom plate; 3-sliding fixed block; 4-vertical plate; 5-fixed pressure device; 6-sliding guide rail; 7-manual pressure clamp; 8-pressure clamp fixing plate; 9-guide column; 10-guide block; 11-linear guide rail; 12-spring top screw mounting hole; 13-spring top screw groove; 14-pressure claw; 15-main spring; 16-pressure spring plate; 17-positioning block; 18-flange seat; 19-heightening plate; 20-rotating shaft; 21-moving contact; 22-semicircular positioning block. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the invention more clearly understood, a movable contact and rotating shaft assembly fixture of a molded case circuit breaker of the invention is further described in detail below in conjunction with the accompanying drawings and embodiments; it should be understood that the specific embodiments described herein are only used to explain the invention and are not intended to limit the invention.

[0032] like Figure 1 As shown, a molded case circuit breaker moving contact and shaft assembly fixture includes a molded case circuit breaker 1, a base plate 2, a sliding fixed block 3, a vertical plate 4 and a fixing device 5, the vertical plate 4 is fixedly mounted on the base plate 2, a sliding guide rail 6 is provided on the upper part of the vertical plate 4, the sliding fixed block 3 is mounted on the sliding guide rail 6 and can slide along the sliding guide rail 6, the molded case circuit breaker 1 is mounted in the groove of the sliding fixed block 3, and the fixing device 5 is fixedly mounted on the base plate 2 and faces the assembly surface of the molded case circuit breaker 1.

[0033] The fixed pressure device 5 includes a manual pressure clamp 7, a pressure clamp fixing plate 8, a guide column 9, a guide block 10 and a linear guide rail 11. The linear guide rail 11 is fixedly installed on the base plate 2, and the guide block 10 is connected to the linear guide rail 11. One end of the guide column 9 is fixedly connected to the guide block 10, and the other end of the guide column 9 is fixedly connected to the pressure clamp fixing plate 8. The manual pressure clamp 7 is fixedly installed on the pressure clamp fixing plate 8. The function of the fixed pressure device 5 is to apply pressure to the main spring 15 to compress the main spring 15, so that the assembly can proceed smoothly. When the assembly is completed, the upper part of the pressure claw 14 is blocked by parts, so the linear guide rail 11 is designed to allow the pressure claw 14 to retreat and then exit the molded case circuit breaker 1.

[0034] like Figure 6 As shown, the vertical plate 4 is provided with a spring top screw installation hole 12, a spring top screw is installed in the spring top screw installation hole 12, and the sliding fixed block 3 is provided with a spring top screw groove 13, the spring top screw groove 13 corresponds to the position of the spring top screw installation hole 12, and when the sliding fixed block 3 moves to the assembly position, the top screw head of the spring top screw falls into the spring top screw groove 13. The sliding of the sliding fixed block 3 on the vertical plate 4 is completed by the spring top screw, and the spring top screw cooperates with the spring top screw groove 13 to smoothly bring the molded case circuit breaker 1 to a precise assembly position.

[0035] like Figure 2 and Figure 3 As shown, the end of the manual pressure clamp 7 is also provided with a pressure claw 14, and the molded case circuit breaker 1 includes a main spring 15 and a pressure spring plate 16, the pressure spring plate 16 is located on the upper part of the main spring 15, and positioning blocks 17 are provided on both sides of the pressure spring plate 16, and the shape of the positioning blocks 17 is consistent with the shape of the jaws of the pressure claw 14. The shape of the pressure claw 14 is consistent with that of the positioning block 17, and the role of this design is to further accurately position the molded case circuit breaker 1, and at the same time ensure that the pressure at both ends of the pressure spring plate 16 is balanced.

[0036] The fixing and pressing device 5 further includes a flange seat 18 and a padding plate 19. The lower part of the guide column 9 is fixedly connected to the flange seat 18. The flange seat 18 is screwed to the padding plate 19. The padding plate 19 is screwed to the guide block 10. Since the linear guide rail 11 is a standard part, the flange seat 18 and the padding plate 19 are used for transfer to ensure the installation height and stability of the guide column 9.

[0037] like Figure 4 and Figure 5 As shown, the number of sections of the sliding fixed block 3 is not less than 3, the number of the spring top screw grooves 13 is the same as the number of sections of the sliding fixed block 3, and each spring top screw groove 13 is located at the same position of each section of the sliding fixed block 3.

[0038] The molded case circuit breaker 1 further includes a rotating shaft 20 and a moving contact 21, and a semicircular positioning block 22 for positioning the rotating shaft 20 is provided between the two sliding fixed blocks 3. The semicircular positioning block 22 can not only separate the two molded case circuit breakers 1, but also play a supporting role for the molded case circuit breaker 1 according to the shape of the molded case circuit breaker 1, thereby further improving the assembly accuracy.

[0039] The number of the guide pillars 9 and the flange seats 18 is not less than 2, and the number of the raising plates 19 , the guide blocks 10 and the linear guide rails 11 is 1 or 2. This design can improve the overall stability of the fixing and pressing device 5 .

[0040] The assembly steps of the molded case circuit breaker 1 are as follows:

[0041] (1) The components of the molded case circuit breaker 1 are installed step by step in the grooves of the sliding fixed block 3, and the sliding fixed block 3 is moved to the assembly position. At this time, the top screw head of the spring top screw falls into the spring top screw groove 13 and clamps the sliding fixed block 3.

[0042] (2) The manual pressing clamp 7 is moved to press downward, and the pressing claw 14 presses down the positioning block 17 on the compression spring plate 16, compressing the main spring 15 downward. At this time, the moving contact 21 and other parts can be installed.

[0043] (3) After the installation is completed, the pressing claw 14 is pushed upward, and the fixing and pressing device 5 is pushed to make it withdraw along the linear guide rail 11, and the spring top screw is unscrewed to complete the assembly work of the one-phase molded case circuit breaker 1.

[0044] (4) Repeat the above steps until all molded case circuit breakers 1 are assembled.

Claims

1. A fixture for assembling a moving contact and a rotating shaft of a molded case circuit breaker, comprising a molded case circuit breaker (1), characterized in that: It also comprises a bottom plate (2), a sliding fixed block (3), a vertical plate (4) and a fixing device (5), wherein the vertical plate (4) is fixedly mounted on the bottom plate (2), a sliding guide rail (6) is provided on the upper part of the vertical plate (4), the sliding fixed block (3) is mounted on the sliding guide rail (6) and can slide along the sliding guide rail (6), the molded case circuit breaker (1) is mounted in a groove of the sliding fixed block (3), and the fixing device (5) is fixedly mounted on the bottom plate (2) and faces the assembly surface of the molded case circuit breaker (1); The fixing and pressing device (5) comprises a manual pressing clamp (7), a pressing clamp fixing plate (8), a guide column (9), a guide block (10) and a linear guide rail (11); the linear guide rail (11) is fixedly mounted on the base plate (2); the guide block (10) is connected to the linear guide rail (11); one end of the guide column (9) is fixedly connected to the guide block (10); the other end of the guide column (9) is fixedly connected to the pressing clamp fixing plate (8); and the manual pressing clamp (7) is fixedly mounted on the pressing clamp fixing plate (8); The vertical plate (4) is provided with a spring top screw installation hole (12), a spring top screw is installed in the spring top screw installation hole (12), the sliding fixed block (3) is provided with a spring top screw groove (13), the spring top screw groove (13) corresponds to the position of the spring top screw installation hole (12), and when the sliding fixed block (3) moves to the assembly position, the top screw head of the spring top screw falls into the spring top screw groove (13).

2. The assembly fixture for the moving contact and the rotating shaft of a molded case circuit breaker according to claim 1, characterized in that: The end of the manual pressure clamp (7) is also provided with a pressure claw (14), and the molded case circuit breaker (1) comprises a main spring (15) and a pressure spring plate (16), wherein the pressure spring plate (16) is located on the upper part of the main spring (15), and positioning blocks (17) are provided on both sides of the pressure spring plate (16), and the shape of the positioning blocks (17) is consistent with the shape of the jaws of the pressure claw (14).

3. The assembly fixture for the moving contact and the rotating shaft of a molded case circuit breaker according to claim 1, characterized in that: The fixed pressure device (5) also includes a flange seat (18) and a padding plate (19), the lower part of the guide column (9) is fixedly connected to the flange seat (18), the flange seat (18) is screwed to the padding plate (19), and the padding plate (19) is screwed to the guide block (10).

4. The movable contact and rotating shaft assembly fixture of a molded case circuit breaker according to claim 1, characterized in that: The number of sections of the sliding fixed block (3) is not less than 3, the number of the spring top screw grooves (13) is the same as the number of sections of the sliding fixed block (3), and each spring top screw groove (13) is located at the same position of each section of the sliding fixed block (3).

5. The assembly fixture for the moving contact and the rotating shaft of a molded case circuit breaker according to claim 4, characterized in that: The molded case circuit breaker (1) further comprises a rotating shaft (20) and a moving contact (21), and a semicircular positioning block (22) for positioning the rotating shaft (20) is provided between the two sliding fixed blocks (3).

6. The fixture for assembling the moving contact and the rotating shaft of a molded case circuit breaker according to claim 3, characterized in that: The number of the guide pillars (9) and the flange seats (18) is no less than 2, and the number of the padding plates (19), the guide blocks (10) and the linear guide rails (11) is 1 or 2.

7. A method for assembling a moving contact and a rotating shaft of a molded case circuit breaker using the assembly fixture as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: A. Install the various components of the molded case circuit breaker (1) in the grooves of the sliding fixed block (3) step by step, and move the sliding fixed block (3) to the assembly position. At this time, the top screw head of the spring top screw falls into the spring top screw groove (13) and clamps the sliding fixed block (3); B. Move the manual pressure clamp (7) to press it downward, and the pressure claw (14) presses down the positioning block (17) on the compression spring plate (16), compressing the main spring (15) downward, and then the moving contact (21) and other parts can be installed; C. After the installation is completed, push the pressing claw (14) upward, push the fixing device (5) to make it withdraw along the linear guide rail (11), unscrew the spring top screw, and complete the assembly of the one-phase molded case circuit breaker (1); D. Repeat the above steps until all molded case circuit breakers (1) are assembled.

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