Circuit breaker main spring assembling jig

Abstract

The utility model relates to the technical field of structure application in the machinery industry, in particular to a circuit breaker main spring assembling jig. The device comprises a bottom plate, wherein a driving transmission shaft, a handle, a driving straight-tooth bevel gear, a driven straight-tooth bevel gear, a driven main shaft and an assembling mechanism are sequentially arranged on the bottom plate; a clamping part is arranged at the tail end of the handle and is vertically clamped in the axial direction of the driving transmission shaft; the driving straight tooth bevel gear is sleeved on the axial direction of the driving transmission shaft; a driven carrier is arranged on the bottom plate, a driven main shaft horizontally penetrates through the driven carrier, one end of the driven main shaft is sleeved with a driven straight-tooth bevel gear, the other end of the driven main shaft is provided with an assembling mechanism, the driven straight-tooth bevel gear is vertically meshed with a driving straight-tooth bevel gear, and the assembling mechanism comprises an assembling shaft arranged at the top end of the driven main shaft. According to the utility model, the main spring of the circuit breaker is quickly assembled by utilizing the characteristics of the straight-tooth bevel gear, so that the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of structural application in the machinery industry, in particular to an assembly fixture for a main spring of a circuit breaker. Background Art

[0002] In the assembly and production of circuit breakers, the lock assembly in the circuit breaker needs to be assembled with the main spring. The intermediate process requires manual assembly of the lock arm of the lock assembly, grease, installation of the main spring, and installation of the handle. The process is complicated and not easy to use automated equipment. The main tension spring is a key part of the circuit breaker operating mechanism and a decisive factor in the circuit breaker contact parameters, affecting the mechanical life of the circuit breaker. Manual installation of the main spring is difficult to assemble with both hands due to the large spring force. Taking a 160A circuit breaker as an example, its operating mechanism has a main tension spring. The tension of a single main tension spring can reach 100N, and assembly requires certain skills. The assembly is difficult and requires high technical requirements for workers. The assembly efficiency is low and it takes a long time. Utility Model Content

[0003] In view of the above technical problems, the utility model solves the technical problem of difficulty in assembling a main spring of a lock assembly in a circuit breaker and provides a circuit breaker main spring assembly fixture.

[0004] In order to solve the above technical problems, the technical solution provided by the utility model is: a circuit breaker main spring assembly fixture, including a base plate, on which an active transmission shaft, a handle, an active spur bevel gear, a driven spur bevel gear, a driven main shaft and an assembly mechanism are arranged in sequence; a clamping portion is provided at the end of the handle, and the clamping portion is vertically clamped in the axial direction of the active transmission shaft; the active spur bevel gear is sleeved in the axial direction of the active transmission shaft; a driven carrier is provided on the base plate, and the driven main shaft horizontally penetrates the driven carrier, one end of the driven main shaft is sleeved with the driven spur bevel gear, and an assembly mechanism is provided at the other end, the driven spur bevel gear is vertically meshed with the active spur bevel gear, and the assembly mechanism includes an assembly shaft arranged at the top end of the driven main shaft.

[0005] Further: In the above-mentioned circuit breaker main spring assembly fixture, the assembly mechanism includes a left limit block and a right limit block which are arranged on the bottom plate at the lower end of the assembly shaft and are parallel to each other and clamp the circuit breaker. A rear limit block is arranged at the rear ends of the left limit block and the right limit block. The clamping part is provided with a handle spring limit notch, and the limit notches are 2. A handle in-situ limit block is also arranged on the bottom plate to cooperate with the limit notch.

[0006] Compared with the prior art, the circuit breaker main spring assembly fixture comprises a base plate, on which a driving transmission shaft, a handle, a driving spur bevel gear, a driven spur bevel gear, a driven main shaft and an assembly mechanism are sequentially arranged; a clamping portion is arranged at the end of the handle, and the clamping portion is vertically clamped in the axial direction of the driving transmission shaft; the driving spur bevel gear is sleeved in the axial direction of the driving transmission shaft; a driven carrier is arranged on the base plate, and the driven main shaft horizontally penetrates the driven carrier, one end of the driven main shaft is sleeved in the driven spur bevel gear, and an assembly mechanism is arranged at the other end, the driven spur bevel gear is vertically meshed with the driving spur bevel gear, and the assembly mechanism comprises an assembly shaft arranged at the top end of the driven main shaft. The main spring is assembled by utilizing the characteristics of spur bevel gears. Most of the traditional spur bevel gears act inside the reduction box and are rarely used on the jig. The utility model utilizes the characteristics of spur bevel gears to quickly assemble the main spring of the circuit breaker. The utility model has low cost, ingenious design, improved production efficiency, reduced manpower, low jig cost, and complies with the assembly process. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a schematic diagram of the structure of the main spring assembly fixture for the circuit breaker of the utility model;

[0008] Figure 2 This is a schematic diagram of the working of the main spring assembly fixture of the circuit breaker of the utility model;

[0009] Figure 3 for Figure 2 The enlarged view in circle A;

[0010] Among them, 1 is the base plate, 2 is the active transmission shaft, 3 is the handle, 4 is the active spur bevel gear, 5 is the driven spur bevel gear, 6 is the driven main shaft, 7 is the driven carrier, 8 is the assembly shaft, 9 is the left limit block, 10 is the right limit block, 11 is the rear limit block, 12 is the limit card notch, 13 is the handle original position limit block, 14 is the circuit breaker fixed shaft, 15 is the main spring, and 16 is the circuit breaker locking arm. DETAILED DESCRIPTION

[0011] In order to facilitate understanding by those skilled in the art, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0012] Reference Figure 1 , 2As shown, a circuit breaker main spring assembly fixture includes a base plate 1, on which a driving transmission shaft 2, a handle 3, a driving spur bevel gear 4, a driven spur bevel gear 5, a driven main shaft 6 and an assembly mechanism are arranged in sequence; a clamping portion is arranged at the end of the handle 3, and the clamping portion is vertically clamped in the axial direction of the driving transmission shaft 2; the driving spur bevel gear 4 is sleeved in the axial direction of the driving transmission shaft 2; a driven carrier 7 is arranged on the base plate, the driven main shaft 6 horizontally penetrates the driven carrier 7, one end of the driven main shaft is sleeved with the driven spur bevel gear 5, and the other end is provided with an assembly mechanism, the driven spur bevel gear 5 is vertically meshed and connected with the driving spur bevel gear 4, and the assembly mechanism includes an assembly shaft 8 arranged at the top of the driven main shaft. The assembly mechanism includes a left limit block 9 and a right limit block 10 arranged on the base plate at the lower end of the assembly shaft, which are parallel to each other and clamped to the circuit breaker. A rear limit block 11 is arranged at the rear ends of the left limit block 9 and the right limit block 10. The clamping part is provided with a handle spring-mounted limit notch 12, and the limit notches are 2. The bottom plate is also provided with a handle original position limit block 13 which cooperates with the limit notch.

[0013] After the circuit breaker is assembled in the previous process, the employee needs to manually place the circuit breaker on the fixture bottom plate 1. The left limit block 9 and the right limit block 10 plus the rear limit block 11 of the circuit breaker will play a limiting role, so that the circuit breaker is always in the same position and at the same time limit the shaking of the circuit breaker. The employee first turns the handle 3 so that a limit notch 12 of the handle 3 is on the handle original position limit block 13 to ensure the initial angle is consistent. The employee then manually hooks the main spring 15 onto the circuit breaker fixed shaft 14, and manually hooks the other side onto the assembly shaft 8, and manually turns the handle 3. The driving wheel transmission shaft 2 will drive the driving spur bevel gear 4 to rotate when the handle 3 is turned. The driving spur bevel gear 4 and the driven spur bevel gear 5 are vertically meshed and connected. The driving spur bevel gear 4 drives the driven spur bevel gear 5 to rotate. The driven main shaft 6 will rotate inside the driven carrier 7 under the force of the driven spur bevel gear 5, and since the assembly shaft 8 is fixed to the top of the driven wheel main shaft 6 When the handle 3 is rotated to another limit notch 12 and to the handle original position limit block 13 (the handle spring limit block 13 can be adjusted to ensure that the handle 3 is rotated to the correct angle each time), the assembly shaft 8 stretches the main spring 15 and moves to the top of the circuit breaker lock arm 14. At this time, the employee needs to withdraw the circuit breaker from the fixture. Due to the force of the employee withdrawing the circuit breaker and the friction of the assembly shaft 8, the main spring 15 will slide into the circuit breaker lock arm 16, thus completing the assembly of the main spring 15. The fixture can quickly assemble the main spring of the circuit breaker, with low cost and ingenious design, and is in line with the assembly process of the circuit breaker.

[0014] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A circuit breaker main spring assembly fixture, comprising a base plate (1), characterized in that: A driving transmission shaft (2), a handle (3), a driving spur bevel gear (4), a driven spur bevel gear (5), a driven spindle (6) and an assembly mechanism are sequentially arranged on the bottom plate; The handle (3) has a clamping portion at the end thereof, and the clamping portion is vertically clamped in the axial direction of the active transmission shaft (2); The active spur bevel gear (4) is sleeved on the axial direction of the active transmission shaft (2); A driven carrier (7) is provided on the bottom plate. The driven main shaft (6) horizontally penetrates the driven carrier (7). One end of the driven main shaft is sleeved with a driven spur bevel gear (5), and the other end is provided with an assembly mechanism. The driven spur bevel gear (5) is vertically meshed and connected with the driving spur bevel gear (4). The assembly mechanism includes an assembly shaft (8) arranged at the top end of the driven main shaft.

2. The circuit breaker main spring assembly fixture according to claim 1, characterized in that: The assembly mechanism comprises a left limit block (9) and a right limit block (10) which are arranged on the bottom plate at the lower end of the assembly shaft and are parallel to each other and clamped with the circuit breaker.

3. The circuit breaker main spring assembly fixture according to claim 2, characterized in that: A rear limit block (11) is provided at the rear ends of the left limit block (9) and the right limit block (10).

4. The circuit breaker main spring assembly fixture according to claim 1, characterized in that: The clamping part is provided with a handle spring limiting notch (12), and there are two limiting notches.

5. The circuit breaker main spring assembly fixture according to claim 4, characterized in that: The bottom plate is also provided with a handle original position limiting block (13) which cooperates with the card limiting notch.

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