Thermal element tapping device for molded case circuit breaker

Abstract

The utility model relates to a tapping device for a thermal element of a molded case circuit breaker. The technical problem to be solved by the utility model is to provide the tapping device for the thermal element of the molded case circuit breaker. According to the technical scheme, the thermal element supporting device comprises a thermal element bearing seat, a thermal element pressing assembly and a thermal element supporting assembly, the thermal element pressing assembly comprises a pressing block, a pre-pressing spring and a connecting screw, and the thermal element supporting assembly comprises a supporting sleeve, a supporting spring and a plug. The thermal element bearing seat is provided with a bearing seat main working opening, a bearing seat bearing groove and a bearing seat limiting hole, a thermal element placing groove is formed in the middle of the bottom face of the bearing seat main working opening, a front positioning column is arranged on the thermal element placing groove, and a rear positioning column is arranged on the bearing seat bearing groove. The utility model has the advantages that through the action of the pressing force of the pre-pressing spring, the pressing block can quickly press the heating part of the thermal element and the upper connecting part of the thermal element of the molded case circuit breaker, the total tapping time is shortened, and the flexibility is higher.

Description

Technical Field

[0001] This utility model relates to a tapping device for the thermal element of a molded case circuit breaker. Background Technology

[0002] The thermal tripping system of a molded case circuit breaker is assembled from a thermal element, a bimetallic strip, and a backing through multiple welding processes, such as... Figure 8 As shown, a traditional molded case circuit breaker's thermal element includes an upper connecting portion 70, a heating portion 71, and a lower connecting portion 72, which are sequentially bent into shape. The upper connecting portion 70 is parallel to the heating portion 71, and the lower connecting portion 71 is bent perpendicularly to form the lower connecting portion 72. The upper connecting portion 70 has a waist-shaped hole 74 for the thermal element, the heating portion 71 has a riveting opening 75, and the lower connecting portion 72 has a threaded seat 76. The threaded seat 76 has a threaded fixing hole 77 perpendicular to the opening 75. We need to tap the thread of the threaded fixing hole 77. Existing... In the process of tapping the threaded fixing hole 77 of the molded case circuit breaker's thermal element tapping device, the tooling used to fix the thermal element is either too tight, making it difficult to insert or insert the thermal element, resulting in a long installation time and increased operational difficulty, thus lengthening the entire tapping process; or it is too loose, failing to provide proper support for the thermal element, causing it to wobble or shift during tapping, resulting in low tapping accuracy. In addition, the traditional device has limited support capacity for the lower connection part 72 of the thermal element. When tapping the threaded fixing hole 77, the lower connection part 72 of the thermal element is prone to slight bending due to the tapping force, resulting in poor thread processing and reduced tapping reliability. Improvements and optimizations are made to address these issues. Utility Model Content

[0003] To solve the above problems, the technical problem to be solved by this utility model is to provide a tapping device for the thermal element of a molded case circuit breaker.

[0004] The technical solution adopted by the hot element tapping device of the molded case circuit breaker of this utility model is characterized by including a hot element receiving seat, a vertically movable hot element pressing assembly, and a horizontally arranged hot element support assembly. The hot element pressing assembly includes a pressing block, a pre-pressurizing spring, and a connecting screw. The hot element support assembly includes a support sleeve, a support spring, and a plug. The hot element receiving seat is provided with a receiving seat main moving port for the pressing block to move up and down, a receiving seat receiving groove for the heating part of the hot element to receive, and a horizontally penetrating receiving seat limiting hole. The receiving seat limiting hole is used for the installation and limiting of the hot element support assembly. The bottom center of the receiving seat main moving port is provided with a hot element insertion groove for the upper connecting part of the hot element to receive. The hot element insertion groove is provided with a front positioning post that passes through the waist-shaped hole of the hot element. The receiving seat receiving groove is provided with a rear positioning post that passes through the opening of the hot element.

[0005] The clamping block includes a clamping block body and a clamping block pressing part located below the clamping block body. The clamping block pressing part is used to clamp the heating part of the heat element and the connecting part on the heat element. The clamping block pressing part is provided with a clamping block front positioning groove that mates with the front positioning post and a clamping block rear positioning groove that mates with the rear positioning post. The pre-compression spring is placed between the upper end of the clamping block and the upper end face of the main operating port of the receiving seat.

[0006] The connecting screw passes through the heat element receiving seat and connects to the clamping block after passing through the upper part of the main operating port of the receiving seat. The pre-compression spring is sleeved on the connecting screw, with one end abutting the upper end of the clamping block and the other end abutting the upper surface of the main operating port of the receiving seat.

[0007] The support sleeve includes a sleeve body and a sleeve limiting part. The sleeve body is provided with a sleeve clearance groove for inserting the threaded seat of the heat element. The heat element receiving seat is provided with a receiving seat front stop at the front end of the receiving seat limiting hole for limiting the sleeve limiting part. The plug is fixed to the rear end of the heat element receiving seat at the receiving seat limiting hole. The support spring is placed in the receiving seat limiting hole, with one end abutting against the sleeve limiting part and the other end abutting against the plug. The sleeve body is used to support the inner side of the lower connecting part of the heat element during tapping.

[0008] The plug is threadedly connected to the inner wall of the limiting hole of the receiving seat.

[0009] The bottom surface of the main operating port of the receiving seat is provided with receiving seat guide posts on both sides of the heat element placement groove, and the main body of the clamping block is provided with clamping block guide holes corresponding to the receiving seat guide posts.

[0010] The main body of the clamping block is provided with a clamping block manual operation part, and the bottom of the clamping block manual operation part is provided with a lifting port for easy manual operation by personnel.

[0011] The advantages of this utility model's tapping device for the thermal element of a molded case circuit breaker are as follows: the clamping force of the pre-compression spring enables the clamping block to quickly clamp the heating part and the upper connecting part of the thermal element of the molded case circuit breaker, which shortens the overall tapping time and provides greater flexibility compared to traditional cylinder clamping; the front and rear positioning posts can effectively reduce the shaking of the thermal element of the molded case circuit breaker and improve the clamping accuracy during clamping; during the tapping process, it effectively prevents the lower connecting part of the thermal element from slightly bending due to the tapping force, significantly improving the tapping effect and reliability. Attached Figure Description

[0012] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0013] Figure 1 This is a schematic diagram of the structure of the tapping device for the thermal element of the molded case circuit breaker of this utility model;

[0014] Figure 2 This is an exploded view of the thermal element pressing assembly of this utility model;

[0015] Figure 3 This is an exploded view of the thermal element support assembly of this utility model;

[0016] Figure 4 This is a front structural diagram of the thermal element receiving seat of this utility model;

[0017] Figure 5 This is a schematic diagram of the structure of the clamping block of this utility model;

[0018] Figure 6 This is a schematic diagram of the back structure of the heat element receiving seat of this utility model;

[0019] Figure 7 This is a schematic diagram of the structure of the support sleeve of this utility model;

[0020] Figure 8 This is a schematic diagram of the thermal element of a molded case circuit breaker. Detailed Implementation

[0021] like Figure 1-7As shown, the present invention relates to a tapping device for the thermal element of a molded case circuit breaker, comprising a thermal element receiving seat 1, a vertically movable thermal element pressing assembly 2, and a horizontally arranged thermal element support assembly 3. The thermal element pressing assembly 2 includes a pressing block 5, a pre-pressurization spring 6, and a connecting screw 7. The thermal element support assembly 3 includes a support sleeve 8, a support spring 9, and a plug 10. The thermal element receiving seat 1 is provided with a receiving seat main operating port 11 for the vertical movement of the pressing block 5, a receiving seat receiving groove 12 for the heating part 71 of the thermal element to be received, and a horizontally penetrating receiving seat limiting hole 13. The receiving seat limiting hole 13 is used for the installation and limiting of the thermal element support assembly 3. The bottom center of the receiving seat main operating port 11 is provided with a thermal element insertion groove 14 for the upper connecting part 70 of the thermal element to be received. The thermal element insertion groove 14 is provided with a front positioning post 15 that passes through the waist-shaped hole 74 of the thermal element. The receiving seat receiving groove 12 is provided with a through-hole... A rear positioning post 16 is provided within the opening 75 of the heating element; the clamping block 5 includes a clamping block body 20 and a clamping block pressing part 21 provided below the clamping block body 20. The clamping block pressing part 21 is used to clamp the heating part 71 of the heating element and the connecting part 70 on the heating element. The clamping block pressing part 21 is provided with a clamping block front positioning groove 22 that mates with the front positioning post 15 and a clamping block rear positioning groove 23 that mates with the rear positioning post 16. The compression spring 6 is placed between the upper end of the compression block 5 and the upper end face of the main operating port 11 of the receiving seat. The compression force of the pre-compression spring 6 enables the compression block 5 to quickly compress the heating part 71 and the upper connecting part 70 of the hot element of the molded case circuit breaker. Compared with the traditional cylinder compression, the overall tapping time is shortened and the flexibility is higher. The front positioning post 15 and the rear positioning post 16 can effectively reduce the shaking of the hot element of the molded case circuit breaker and improve the compression accuracy during compression.

[0022] The connecting screw 7 passes through the heat element receiving seat 1 and connects to the clamping block 5 after passing through the upper part of the main operating port 11 of the receiving seat. The pre-compression spring 6 is sleeved on the connecting screw 7, with one end abutting the upper end of the clamping block 5 and the other end abutting the upper surface of the main operating port 11 of the receiving seat.

[0023] The support sleeve 8 includes a sleeve body 25 and a sleeve limiting part 26. The sleeve body 25 is provided with a sleeve clearance groove 27 for inserting the heat element thread seat 76. The heat element receiving seat 1 is provided with a receiving seat front stop 28 at the front end of the receiving seat limiting hole 13 for limiting the sleeve limiting part 26. The plug 10 is fixed to the rear end of the heat element receiving seat 1 at the receiving seat limiting hole 13. The support spring 9 is placed in the receiving seat limiting hole 13. One end of the sleeve abuts against the sleeve limiting part 26 and the other end abuts against the plug 10. The sleeve body 25 is used to support the inner side of the lower connection part 72 of the heat element when tapping. The support spring 9 provides support force to the support sleeve 8, so that the lower connection part 72 of the heat element can be supported when tapping the thread fixing hole 77 of the heat element thread seat 76. This effectively prevents the lower connection part 72 of the heat element from being slightly bent by the tapping force, resulting in poor tapping effect.

[0024] The plug 10 is threaded to the inner wall of the receiving seat limiting hole 13. The position of the plug 10 can be adjusted as needed to adjust the supporting force of the supporting spring 9, making it more flexible to use.

[0025] The bottom surface of the main operating port 11 of the receiving seat is provided with receiving seat guide posts 30 on both sides of the heat element placement groove 14. The main body 20 of the pressing block is provided with pressing block guide holes 31 corresponding to the receiving seat guide posts 30, which reduces the problem of inaccurate positioning or uneven pressing force caused by the tilt of the pressing block 5 during movement.

[0026] The clamping block body 20 is provided with a clamping block manual operation part 33. The bottom of the clamping block manual operation part 33 is provided with a lifting port 34 for easy manual operation by personnel, which reduces the workload of operators and improves tapping efficiency.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model are included within the protection scope of the present utility model.

Claims

1. A device for tapping the thermal element of a molded case circuit breaker, characterized in that: The utility model provides a heat element holder (1), vertically movable heat element compression assembly (2), transversely arranged heat element support assembly (3), the heat element compression assembly (2) includes compression block (5), pre-compression spring (6) and connecting screw (7), the heat element support assembly (3) includes support sleeve (8), support spring (9) and plug (10), the heat element holder (1) is equipped with for the up and down movement of compression block (5) heat element holder active mouth (11), for heat element heating part (71) the heat element holder slot (12) of holding, the transverse through heat element holder limiting hole (13), the heat element holder limiting hole (13) is used for the installation and limiting of heat element support assembly (3), the heat element holder active mouth (11) bottom surface middle part is equipped with for heat element upper connecting part (70) the heat element placement slot (14) of holding, the heat element placement slot (14) is equipped with the front locating post (15) in the heat element waist hole (74) of being passed in, the heat element holder slot (12) is equipped with the rear locating post (16) in the heat element opening (75) of being passed in, The compression block (5) includes compression block main body (20) and the compression block lower part (21) below the compression block main body (20), the compression block lower part (21) is used for the compression of heat element heating part (71) and heat element upper connecting part (70), the compression block lower part (21) is equipped with with the front locating slot (22) of the butt joint of front locating post (15), with the rear locating slot (23) of the butt joint of rear locating post (16), the pre-compression spring (6) is placed between the upper end of compression block (5) and the upper end surface of heat element holder active mouth (11).

2. The device according to claim 1, wherein: The connecting screw (7) is connected with the compression block (5) after passing through the heat element holder (1) in the upper part of heat element holder active mouth (11), the pre-compression spring (6) is sleeved on the connecting screw (7), and one end of the pre-compression spring (6) abuts against the upper end of the compression block (5), and the other end of the pre-compression spring (6) abuts against the upper end surface of the heat element holder active mouth (11).

3. The device according to claim 1, wherein: The support sleeve (8) includes sleeve cylinder (25) and sleeve limiting part (26), the sleeve cylinder (25) is provided with sleeve accommodation groove (27) for heat element threaded seat (76) placement, the heat element holder (1) is provided with heat element holder front stop edge (28) for limiting sleeve limiting part (26) at the front end of heat element holder limiting hole (13), the plug (10) is fixed at the rear end of heat element holder (1) at heat element holder limiting hole (13), the support spring (9) is placed in heat element holder limiting hole (13), one end of the support spring (9) abuts against the sleeve limiting part (26), and the other end of the support spring (9) abuts against the plug (10), and the sleeve cylinder (25) is used for supporting when tapping the inner side of heat element lower connecting part (72).

4. The device according to claim 3, wherein: The plug (10) is threadedly connected with the inner wall of the heat element holder limiting hole (13).

5. The device as claimed in claim 2, wherein: The bottom surface of the active action port (11) of the receiving seat is provided with receiving seat guide columns (30) on both sides of the hot element insertion groove (14), and the main body (20) of the pressing block is provided with pressing block guide holes (31) corresponding to the receiving seat guide columns (30).

6. The device according to claim 2, wherein: The main body (20) of the pressing block is provided with a pressing block hand operating part (33), and the bottom of the pressing block hand operating part (33) is provided with a hand lifting port (34) facilitating manual operation.

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