Detection tool for bearing support of molded case circuit breaker

Abstract

The utility model discloses a molded case circuit breaker bearing support testing fixture, which comprises a base, a support frame is arranged in a groove at the inner side of the base, a bearing support positioning assembly is arranged at the inner side of the support frame, and a bearing support main body is arranged on a reference line at the middle parts of the end surfaces of the base and the support frame. By installing the bearing support positioning assembly, the positioning plate and the profiling positioning block at the two ends can be driven to be matched with the outline of the bearing support, it is ensured that the bearing support is positioned and fixed, a user only needs to rotate a rotary knob at one end to fix the bearing support in the middle, and if the bearing support cannot be completely attached to the positioning plate or the profiling positioning block, the bearing support can be fixed. Or the positioning pin cannot be inserted between the second mounting hole and the positioning hole, the bearing support may be deformed or the hole diameter is out of tolerance, a go-no go gauge is arranged at the front end of the bearing support and used for detecting the hole diameter of the bearing hole, and if the go end of the go-no go gauge can be smoothly inserted into the hole and the no-go end does not pass through the hole, the requirement is met.

Description

Technical Field

[0001] This utility model relates to the field of testing technology for molded case circuit breaker components, specifically to a testing tool for the bearing bracket of a molded case circuit breaker. Background Technology

[0002] Molded case circuit breakers (MCCBs) are circuit control devices encapsulated in a high-strength plastic shell and equipped with overload and short-circuit protection functions. They are widely used in power distribution systems and equipment protection. The bearing bracket of an MCCB is a key mechanical component inside the MCCB, mainly used to support and fix the operating mechanism of the circuit breaker, ensuring smooth and reliable operation of the circuit breaker during opening / closing. It is mostly a block or plate structure with bearing holes, mounting holes and reinforcing ribs. The machining accuracy of the bearing bracket directly affects the performance of the circuit breaker, so the bearing bracket needs to be inspected using inspection tools.

[0003] Traditional inspection methods, such as vernier calipers and coordinate measuring machines, are inefficient, costly, and complex to operate, relying on human experience. To address this, a special inspection tool with a simple structure and convenient operation is proposed to enable rapid determination of key dimensions of bearing brackets, such as inner hole diameter and hole spacing, reducing reliance on manual skills. Utility Model Content

[0004] The purpose of this invention is to provide a tooling for the bearing support of a molded case circuit breaker, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fixture for a bearing bracket of a molded case circuit breaker, comprising a base, a support frame provided in a groove on the inner side of the base, a bearing bracket positioning assembly installed on the inner side of the support frame, a bearing bracket body placed on a reference line at the midpoint of the end faces of the base and the support frame, a bearing hole opened in the middle of the bearing bracket body, a mounting hole one opened on the outer wall surface of the bearing bracket body, and mounting holes two opened at both ends of the bearing bracket body.

[0006] The bearing bracket positioning assembly includes a bidirectional threaded rod, which is mounted inside the support frame via a bearing. Movable blocks are threaded to the outer walls of both ends of the bidirectional threaded rod. Connecting plates are fixedly connected to the front and rear outer surfaces of each movable block. Guide rods are fixedly connected to the grooves on both sides of the inner side wall of the base. The other end of each connecting plate is slidably connected to the guide rod. A positioning plate is fixedly connected to the top of each movable block. A rubber pad is provided at the end of each positioning plate near the bearing bracket body. Slider blocks are fixedly connected to both ends of the bottom of each positioning plate. A contour positioning block is bolted to the upper end of each positioning plate, and the contour positioning blocks are located at both ends of the bearing bracket body.

[0007] In the above technical solution, the drive causes the positioning plates and contour positioning blocks at both ends to match the bearing bracket contour, ensuring that the bearing bracket is positioned and fixed. The user only needs to turn the knob at one end to fix the centered bearing bracket.

[0008] The base has a bracket at its front end via a guide rail, and a go / no-go gauge is supported on the bracket. The go / no-go gauge is located directly in front of the bearing bracket body. Mounting hole one is checked by a go / no-go pin, and mounting hole two is fixed by a positioning pin.

[0009] In the above technical solution, the go / no-go gauge is used to detect the diameter of the bearing hole. If the go end of the go / no-go gauge can be smoothly inserted into the hole and the no-go end cannot pass through, it meets the requirements. The diameter of the mounting hole one is detected by the go / no-go pin. If the go end can be smoothly inserted into the hole and the no-go end cannot pass through, it is qualified. Otherwise, it is unqualified.

[0010] As a further preferred embodiment of this technical solution, mounting plates are fixedly connected to the lower sides of both sides of the base, and the mounting plates have slots on both sides.

[0011] As a further preferred embodiment of this technical solution, the support frame has sliding grooves on both the front and rear sides, and the sliders are slidably connected in the sliding grooves. The support frame has through slots on both the left and right ends, and the top of the movable block passes through the through slots and connects to the positioning plate.

[0012] As a further preferred embodiment of this technical solution, each of the contour positioning blocks is provided with an anti-slip rubber pad at one end near the bearing bracket body.

[0013] As a further preferred embodiment of this technical solution, positioning holes are provided on the contour positioning block and directly above the second mounting hole. Positioning pins are inserted between the positioning holes and the second mounting hole for detecting the second mounting hole and preventing axial displacement of the bearing bracket body.

[0014] In the above technical solution, if the bearing bracket cannot fully fit the positioning plate or the contour positioning block, or if the positioning pin cannot be inserted between the mounting hole and the positioning hole, the bearing bracket may be deformed or have an out-of-tolerance hole diameter.

[0015] As a further preferred embodiment of this technical solution, a knob is installed at one end of the bidirectional threaded rod.

[0016] As a further preferred embodiment of this technical solution, the rubber pads on the positioning plates at both ends are in contact with both sides of the bearing bracket body.

[0017] In the above technical solution, the rubber pad has an anti-slip effect, increases friction, and improves the positioning effect.

[0018] This utility model provides a gauge for the bearing bracket of a molded case circuit breaker, which has the following advantages:

[0019] (1) By installing the bearing bracket positioning component, this utility model can drive the positioning plates and contour positioning blocks at both ends to match the bearing bracket contour, ensuring that the bearing bracket is positioned and fixed. The user only needs to turn the knob at one end to fix the centered bearing bracket. If the bearing bracket cannot fully fit the positioning plate or contour positioning block, or if the positioning pin cannot be inserted between the mounting hole and the positioning hole, the bearing bracket may be deformed or the hole diameter may be out of tolerance.

[0020] (2) This utility model uses a go / no-go gauge at the front end of the bearing bracket to detect the diameter of the bearing hole. If the go end of the go / no-go gauge can be smoothly inserted into the hole and the no-go end cannot pass through, it meets the requirements. The diameter of the mounting hole is detected by the go / no-go pin. If the go end can be smoothly inserted into the hole and the no-go end cannot pass through, it is qualified. Otherwise, it is unqualified. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a partial cross-sectional view of the present invention;

[0023] Figure 3 This is a schematic diagram of the support frame of this utility model;

[0024] Figure 4 This is an enlarged view of Figure A of this utility model;

[0025] In the diagram: 1. Base; 2. Mounting plate; 3. Support frame; 31. Slide groove; 32. Through groove; 4. Bearing bracket positioning assembly; 41. Two-way threaded rod; 42. Movable block; 43. Connecting plate; 44. Guide rod; 45. Positioning plate; 451. Slider; 46. Contour positioning block; 461. Positioning hole; 47. Anti-slip pad; 5. Bearing bracket body; 51. Bearing hole; 52. Mounting hole one; 53. Mounting hole two; 6. Bracket; 7. Go / no-go gauge. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0027] This utility model provides a technical solution: such as Figure 1As shown, in this embodiment, the inspection fixture for the bearing bracket of the molded case circuit breaker includes a base 1. Mounting plates 2 are fixedly connected to the lower sides of both sides of the base 1. Holes and slots are opened on both sides of the mounting plates 2. A support frame 3 is provided in the groove on the inner side of the base 1. A bearing bracket positioning assembly 4 is installed on the inner side of the support frame 3. A bearing bracket body 5 is placed on the reference line at the middle of the end face of the base 1 and the support frame 3. A bearing hole 51 is opened in the middle of the bearing bracket body 5. A mounting hole 1 52 is opened on the outer wall surface of the bearing bracket body 5. A mounting hole 2 53 is opened at both ends of the bearing bracket body 5.

[0028] like Figure 2 and Figure 3 As shown, the bearing bracket positioning assembly 4 includes a bidirectional threaded rod 41. A knob is installed at one end of the bidirectional threaded rod 41. The bidirectional threaded rod 41 is mounted inside the support frame 3 via a bearing. Movable blocks 42 are threadedly connected to the outer walls of both ends of the bidirectional threaded rod 41. Connecting plates 43 are fixedly connected to the front and rear outer surfaces of the movable blocks 42. Guide rods 44 are fixedly connected to the grooves on both sides of the inner side wall of the base 1. The other end of the connecting plate 43 is slidably connected to the guide rod 44. Positioning plates 45 are fixedly connected to the top of the movable blocks 42. Slide grooves 31 are provided on both the front and rear sides of the support frame 3. Sliding blocks 451 are slidably connected in the slide grooves 31. Through slots 32 are provided on both the left and right ends of the support frame 3. The top of the movable blocks 42 passes through the through slots 32 and connects to the positioning plates 45. A rubber pad is provided on the end of the positioning plate 45 near the bearing bracket body 5. The rubber pads on the positioning plates 45 at both ends are in contact with both sides of the bearing bracket body 5. The bottom ends of the positioning plates 45 are fixedly connected with sliders 451. The upper end of the positioning plates 45 is provided with contour positioning blocks 46 by bolts. The contour positioning blocks 46 are located at both ends of the bearing bracket body 5. The end of the contour positioning blocks 46 near the bearing bracket body 5 is provided with anti-slip rubber pads 47. By installing the bearing bracket positioning assembly, the positioning plates 45 and contour positioning blocks 46 at both ends can be driven to match the contour of the bearing bracket, ensuring that the bearing bracket is positioned and fixed. The user only needs to turn the knob at one end to fix the centered bearing bracket. If the bearing bracket cannot fully fit the positioning plate 45 or the contour positioning block 46, or if the positioning pin cannot be inserted between the mounting hole 53 and the positioning hole 461, the bearing bracket may be deformed or the hole diameter may be out of tolerance.

[0029] like Figure 1 and Figure 4As shown, a bracket 6 is provided at the front end of the base 1 via a guide rail. A go / no-go gauge 7 is supported on the bracket 6. The go / no-go gauge 7 is located directly in front of the bearing bracket body 5. Mounting hole 1 52 is checked by a go / no-go pin, and mounting hole 2 53 is fixed by a positioning pin. A positioning hole 461 is provided on the contour positioning block 46 and directly above mounting hole 2 53. A positioning pin is inserted between the positioning hole 461 and mounting hole 2 53 for checking mounting hole 2 53 and preventing axial displacement of bearing bracket body 5. By setting the go / no-go gauge 7 at the front end of the bearing bracket, the diameter of the bearing hole is checked. If the go end of the go / no-go gauge 7 can be smoothly inserted into the hole and the no-go end cannot pass through, it meets the requirements. The diameter of mounting hole 1 52 is checked by a go / no-go pin. If the go end can be smoothly inserted into the hole and the no-go end cannot pass through, it is qualified; otherwise, it is unqualified.

[0030] This utility model provides a testing tool for bearing brackets of molded case circuit breakers. The specific working principle is as follows: The bearing bracket body 5 is placed centrally on the base 1 and the support frame 3. The user rotates the knob to drive the bidirectional threaded rod 41 to rotate, so that the movable blocks 42 at both ends move towards each other, so that the positioning plates 45 and the contour positioning blocks 46 at both ends match the contour of the bearing bracket, ensuring that the bearing bracket is positioned and fixed. If the bearing bracket cannot fully fit the positioning plate 45 or the contour positioning block 46, or the positioning pin cannot be inserted between the mounting hole 53 and the positioning hole 461, the bearing bracket may be deformed or the hole diameter is out of tolerance. A go / no-go gauge 7 is set to detect the diameter of the bearing hole. If the go end of the go / no-go gauge 7 can be smoothly inserted into the hole and the no-go end cannot pass through, it meets the requirements. The diameter of the mounting hole 52 is detected by the go / no-go pin. If the go end can be smoothly inserted into the hole and the no-go end cannot pass through, it is qualified. Otherwise, it is unqualified. Qualified and unqualified bearing brackets are placed separately.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fixture for the bearing support of a molded case circuit breaker, comprising a base (1), characterized in that: The base (1) has a support frame (3) in the inner groove. The support frame (3) has a bearing bracket positioning assembly (4) installed inside. The bearing bracket body (5) is placed on the reference line at the middle of the end face of the base (1) and the support frame (3). The bearing bracket body (5) has a bearing hole (51) in the middle. The bearing bracket body (5) has an installation hole one (52) on the outer wall surface. The bearing bracket body (5) has an installation hole two (53) at both ends. The bearing bracket positioning assembly (4) includes a bidirectional threaded rod (41), which is mounted on the inner side of the support frame (3) via a bearing. Both ends of the bidirectional threaded rod (41) are threaded with movable blocks (42). The front and rear outer surfaces of the movable blocks (42) are fixedly connected with connecting plates (43). The grooves on both sides of the inner side of the base (1) are fixedly connected with guide rods (44). The other end of the connecting plate (43) is slidably connected to the guide rod (44). The top of the movable blocks (42) is fixedly connected with positioning plates (45). The end of the positioning plate (45) near the bearing bracket body (5) is provided with a rubber pad. Both ends of the bottom of the positioning plate (45) are fixedly connected with sliders (451). The upper end of the positioning plate (45) is provided with contour positioning blocks (46) by bolts. The contour positioning blocks (46) are located at both ends of the bearing bracket body (5). The base (1) has a bracket (6) at its front end via a guide rail. A go / no-go gauge (7) is supported on the bracket (6). The go / no-go gauge (7) is located directly in front of the bearing bracket body (5). The first mounting hole (52) is detected by a go / no-go pin, and the second mounting hole (53) is fixed by a positioning pin.

2. The inspection fixture for the bearing bracket of a molded case circuit breaker according to claim 1, characterized in that: Mounting plates (2) are fixedly connected to the lower sides of both sides of the base (1), and the mounting plates (2) have holes and slots on both sides.

3. The inspection fixture for the bearing bracket of a molded case circuit breaker according to claim 1, characterized in that: The support frame (3) has sliding grooves (31) on both the front and rear sides, and the sliders (451) are slidably connected in the sliding grooves (31). The support frame (3) has through grooves (32) on both the left and right ends, and the top of the movable block (42) passes through the through grooves (32) and is connected to the positioning plate (45).

4. The inspection fixture for the bearing bracket of a molded case circuit breaker according to claim 1, characterized in that: Each of the contour positioning blocks (46) is provided with an anti-slip pad (47) at one end near the bearing bracket body (5).

5. The inspection fixture for the bearing bracket of a molded case circuit breaker according to claim 1, characterized in that: The contour positioning block (46) is provided with positioning holes (461) located directly above the second mounting hole (53). Positioning pins are inserted between the positioning holes (461) and the second mounting hole (53) for detecting the second mounting hole (53) and preventing axial displacement of the bearing bracket body (5).

6. The inspection fixture for the bearing bracket of a molded case circuit breaker according to claim 1, characterized in that: A knob is installed at one end of the bidirectional threaded rod (41).

7. The inspection fixture for the bearing bracket of a molded case circuit breaker according to claim 1, characterized in that: The rubber pads on the positioning plates (45) at both ends are in contact with both sides of the bearing bracket body (5).

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