A main spring assembly device

Abstract

The present invention belongs to the technical field of circuit breaker assembly, and particularly relates to a main spring assembly device, which includes a bracket, a main spring rotating and installing device, a fixture, and a fixture moving device. The main spring rotating and installing device includes a rotating cylinder, a rotating assembly, and a stretching shaft. The rotating assembly is arranged at the rotating end of the rotating cylinder, and one end of the stretching shaft is fixed on the rotating assembly. The rotating cylinder rotates to drive the rotating assembly and the stretching shaft to rotate in sequence. The fixture moving device controls the movement of the fixture. When the main spring assembly device is in the initial position, the fixture approaches the main spring rotating and installing device, and the stretching shaft penetrates into the free hook end of the main spring. When the main spring assembly device moves to the transition position, the fixture approaches the main spring rotating and installing device, and the stretching shaft moves circumferentially to avoid the lever, and the free hook end is stretched above the lever. When the main spring assembly device moves to the completion position, the fixture is pushed away from the main spring rotating and installing device, the free hook end disengages from the stretching shaft, and the main spring contracts under the elastic action and hooks on the lever.

Description

Technical Field

[0001] The invention belongs to the technical field of circuit breaker assembly, and particularly relates to a main spring assembly device. Background Art

[0002] In the prior art, the operating mechanism of a molded case circuit breaker, such as Figure 1 shown, includes a lever, a main spring and a body. One end of the main spring is hooked on the lever, and the other end is fixed on the body. Due to the narrow space inside the operating mechanism and the lever blocking the direct stretching of the main spring, for a long time, the assembly of the main spring in the operating mechanism has been realized by manually using a hook. During operation, first hook one end of the main spring and pull it upward forcefully until it reaches the upper end of the lever, and then drop it into the spring hanging hole. The actual operation is very laborious, and there will be difficulties in assembly, or even the situation of incomplete assembly, which poses a quality hazard and increases the workload of subsequent quality inspection. Summary of the Invention

[0003] In order to solve the problems existing in the prior art, the invention proposes a new main spring assembly device. Through a unique structural design, the problem that the main spring cannot be directly stretched is avoided, and the automatic assembly of the main spring is realized by using a mechanical structure.

[0004] The specific technical solution of the invention is as follows:

[0005] A main spring assembly device for assembling a main spring onto an operating mechanism, the operating mechanism including a lever, the main spring assembly device including a bracket, a main spring rotary mounting device, a fixture and a fixture moving device. The main spring rotary mounting device and the fixture moving device are both arranged on the bracket, and one end of the main spring is fixed on the operating mechanism; the main spring rotary mounting device includes a rotary cylinder, a rotary assembly and a stretching shaft. The rotary assembly is arranged at the rotary end of the rotary cylinder, and one end of the stretching shaft is fixed on the rotary assembly. The rotary cylinder rotates to drive the rotary assembly and the stretching shaft to rotate in sequence, so that the stretching shaft moves along a circumference; the fixture moving device controls the movement of the fixture to move it away from or close to the main spring rotary mounting device; the main spring assembly device has an initial position, a transition position and a completion position. When the main spring assembly device is at the initial position, the fixture moving device controls the fixture to approach the main spring rotary mounting device, and the stretching shaft penetrates into the free hook end of the main spring that is not fixed on the operating mechanism; when the main spring assembly device moves from the initial position to the transition position, the fixture moving device controls the fixture to approach the main spring rotary mounting device, and the rotary assembly rotates to drive the stretching shaft to move circumferentially to avoid the lever, and stretches the free hook end of the main spring above the lever; when the main spring assembly device moves from the transition position to the completion position, the fixture moving device pushes the fixture away from the main spring rotary mounting device, the free hook end of the main spring disengages from the stretching shaft, and the main spring contracts under the elastic action and hooks on the lever.

[0006] Among them, the rotating assembly includes a rotating pad and a rotating fixed plate, the rotating pad is provided with a limiting groove, and the rotating fixed plate is provided with a limiting hole corresponding to the limiting groove. The rotating fixed plate cooperates with the rotating pad to fix the end of the stretching shaft in the limiting groove, and the stretching shaft extends out of the rotating assembly through the limiting hole.

[0007] Wherein, a boss is arranged on the rotating pad, and a yielding structure is arranged on the rotating fixed plate corresponding to the boss.

[0008] Wherein, the rotating pad and the rotating fixing plate are also provided with fixing devices correspondingly.

[0009] The stretching shaft is designed in sections, including a lower section for fixing on the rotating assembly, and an upper section for hooking the main spring, and the diameter of the lower section is larger than that of the upper section.

[0010] Wherein, the clamp moving device is located below the main spring rotating installation device.

[0011] Wherein, the clamp moving device comprises a telescopic cylinder, and the clamp is arranged at the telescopic end of the telescopic cylinder.

[0012] The fixture comprises a positioning block and a positioning rod, wherein the positioning block is adapted to the outer contour of the operating mechanism, and the positioning rod fixes various parts in the operating mechanism.

[0013] Wherein, the bracket includes a base, a support column and a position adjustment clamp, the support column is fixed on the base, the position adjustment clamp is arranged on the support column, and the main spring rotation installation device is connected to the position adjustment clamp.

[0014] It also includes a position switching device, which includes a signal switching shaft and a trigger switch. The signal switching shaft is interlocked with the rotating cylinder for rotation, and the trigger switch is electrically connected to the telescopic cylinder. When the main spring assembly device reaches the transition position, the signal switching shaft triggers the trigger switch, the telescopic cylinder pushes the clamp out, and the main spring assembly device reaches the completion position.

[0015] Beneficial Effects

[0016] The invention has a simple structure, can realize automatic assembly of the main spring of the circuit breaker operating mechanism, and cleverly utilizes the sequential action of the mechanical structure to form a logical linkage without the need for an external electrical control device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the prior art.

[0018] Figure 2 Schematic diagram of the present invention

[0019] Figure 3 Schematic diagram of the main spring rotating and mounting device of the present invention

[0020] Figure 4 Schematic diagram of the fixture moving device of the present invention

[0021] Figure 5 Schematic diagram of the rotating assembly of the present invention

[0022] Figure 6 Schematic diagram of the stretching shaft of the present invention

[0023] Figure 7 Schematic diagram of the initial position and the completed position of the present invention

[0024] Figure 8 Schematic diagram of the initial position of the present invention

[0025] Figure 9 Schematic diagram of the completed position of the present invention

[0026] Wherein 1 is a bracket, 2 is a main spring rotating and mounting device, 3 is a fixture moving device, 4 is a fixture, 5 is a position switching device, 11 is a base, 12 is a support column, 13 is a position adjusting clamp, 21 is a rotating cylinder, 22 is a rotating assembly, 23 is a stretching shaft, 25 is a fixing device, 221 is a rotating backing plate, 222 is a limiting groove, 223 is a rotating fixing plate, 224 is a limiting hole, 31 is a telescopic cylinder, 51 is a trigger switch, and 52 is a signal switching shaft. Detailed implementation manners

[0027] As shown in Figure 2 The main spring assembling device of the present invention includes a bracket 1, a main spring rotating and mounting device 2, a fixture 4, and a fixture moving device 3. The main spring rotating and mounting device 2 and the fixture moving device 3 are both arranged on the bracket 1. The fixture 4 is used to fix the circuit breaker operating mechanism to be assembled, and one end of the main spring is fixed on the operating mechanism. As shown in Figure 3 The main spring rotating and mounting device 2 includes a rotating cylinder 21, a rotating assembly 22, and a stretching shaft 23. The rotating assembly 22 is arranged at the rotating end of the rotating cylinder 21. One end of the stretching shaft 23 is fixed on the rotating assembly 22. The rotating cylinder 21 rotates to drive the rotating assembly 22 and the stretching shaft 23 to rotate in sequence, so that the stretching shaft 23 moves along a circumference; As shown in Figure 4 The fixture moving device 3 includes a telescopic cylinder 31, and the fixture 4 is arranged at the telescopic end of the telescopic cylinder 31; As shown in Figure 7 , Figure 8 , Figure 9As shown, the main spring assembly device of the present invention has an initial position, a transition position and a completion position. When the main spring assembly device is located at the initial position, the clamp moving device 3 is not extended, and the stretching shaft 23 penetrates into the free hook end of the main spring that is not fixed on the operating mechanism; when the main spring assembly device moves from the initial position to the transition position (not shown in the figure), the clamp moving device 3 is never extended, and the rotation component 22 drives the stretching shaft 23 to move circumferentially to avoid the lever, and the free hook end of the main spring is stretched above the lever; when the main spring assembly device is located at the completion position, the clamp moving device 3 extends to push the clamp 4 away from the main spring rotation installation device 2, and the free hook end of the main spring disengages from the stretching shaft 23, shrinks under the action of elasticity and hooks on the lever.

[0028] The main spring assembly device described in the present invention, based on the structural characteristics of the circuit breaker operating mechanism, cleverly utilizes the rotational stretching method to stretch the main spring in a limited space, and relies on the elastic force of the stretched main spring itself to directly hook the lever after the stretching shaft 23 is withdrawn. This is different from the traditional straight pull method, which saves effort and prevents the main spring from being pulled into place, thereby effectively realizing the automatic mechanical assembly of the main spring.

[0029] Specifically, in this embodiment, Figure 5 As shown, the rotating component 22 includes a rotating pad 221 and a rotating fixed plate 223. The rotating pad 221 is provided with a limiting groove 222, and the rotating fixed plate 223 is provided with a limiting hole 224 corresponding to the limiting groove 222. The rotating fixed plate 223 cooperates with the rotating pad 221 to fix the end of the stretching shaft 23 in the limiting groove 222, and the stretching shaft 23 extends out of the rotating component 22 through the limiting hole 224.

[0030] Specifically, in this embodiment, Figure 5 As shown, a boss is provided on the rotating pad 221, and a yielding structure is provided on the rotating fixing plate 223 corresponding to the boss. The entire rotating assembly 22 is positioned through the cooperation between the boss and the yielding structure.

[0031] Specifically, if Figure 3 As shown, the rotating pad 221 and the rotating fixing plate 223 are also provided with fixing devices 25 correspondingly. In this embodiment, the fixing devices 25 are bolts.

[0032] Specifically, if Figure 6 As shown, the stretching shaft 23 is designed in sections, including a lower section for fixing on the rotating assembly 22, and an upper section for hooking the main spring. The diameter of the lower section is larger than that of the upper section, thereby ensuring the stability of the lower section when fixed and facilitating the guiding and hooking of the main spring.

[0033] Specifically, in this embodiment, the fixture moving device 3 is located below the main spring rotating and mounting device 2.

[0034] Specifically, the fixture 4 includes a positioning block and a positioning rod. The positioning block is adapted to the outer contour of the operating mechanism, and the positioning rod fixes the parts in the operating mechanism to prevent interference between the main spring and the parts during the assembly process.

[0035] Specifically, as Figure 1 shown, the bracket 1 includes a base 11, a support column 12, and a position adjustment clamp 13. The support column 12 is fixed on the base 11, the position adjustment clamp 13 is arranged on the support column 12, and the main spring rotating and mounting device 2 is connected to the position adjustment clamp 13. With such a setting, the main spring rotating and mounting device 2 can adjust its position, increasing its versatility.

[0036] Specifically, as Figure 1 shown, the main spring assembly device of the present invention further includes a position switching device 5, including a signal switching shaft 52 and a trigger switch 51. The signal switching shaft 52 rotates interlocked with the rotating cylinder 21, and the trigger switch 51 is electrically connected to the telescopic cylinder 31. When the main spring assembly device reaches the transition position, the signal switching shaft 52 triggers the trigger switch 51, and the telescopic cylinder 31 pushes out the fixture 4, and the main spring assembly device reaches the completion position.

[0037] When the present invention is in use, it is first reset to the initial position. The circuit breaker operating mechanism is fixed in the fixture, the free hook end of the main spring is hung on the stretching shaft, the rotating cylinder is started, the main spring is stretched by the stretching shaft, so that its free hook end reaches above the lever of the circuit breaker operating mechanism. At this time, the signal switching shaft rotates interlocked with the rotating cylinder and triggers the trigger switch, and the telescopic cylinder pushes out the fixture, causing the main spring to disengage from the stretching shaft. Under the action of its own elastic force, the free hook end of the main spring is hung on the lever, realizing the assembly of the main spring.

Claims

1. A main spring assembly device for assembling a main spring onto an operating mechanism, the operating mechanism including a lever, characterized in that, It comprises a bracket (1), a main spring rotation installation device (2), a clamp (4) and a clamp moving device (3), wherein the main spring rotation installation device (2) and the clamp moving device (3) are both arranged on the bracket (1), and one end of the main spring is fixed on the operating mechanism; The main spring rotation installation device (2) comprises a rotation cylinder (21), a rotation assembly (22) and a stretching shaft (23), wherein the rotation assembly (22) is arranged at the rotation end of the rotation cylinder (21), and one end of the stretching shaft (23) is fixed on the rotation assembly (22), and the rotation of the rotation cylinder (21) drives the rotation assembly (22) and the stretching shaft (23) to rotate in turn, so that the stretching shaft (23) moves along a circle; The clamp moving device (3) comprises a telescopic cylinder (31), the clamp (4) is arranged at the telescopic end of the telescopic cylinder (31), and the clamp moving device (3) controls the movement of the clamp (4) to move it away from or close to the main spring rotation installation device (2); It also includes a position switching device (5), which includes a signal switching shaft (52) and a trigger switch (51), wherein the signal switching shaft (52) rotates interlocked with the rotary cylinder (21), and the trigger switch (51) is electrically connected to the telescopic cylinder (31); The main spring assembly device has an initial position, a transition position and a completion position. When the main spring assembly device is located at the initial position, the clamp moving device (3) controls the clamp (4) to approach the main spring rotation installation device (2), and the stretching shaft (23) penetrates into the free hook end of the main spring that is not fixed on the operating mechanism; when the main spring assembly device moves from the initial position to the transition position, the clamp moving device (3) controls the clamp (4) to approach the main spring rotation installation device (2), the main spring is stretched by the stretching shaft (23), and the rotating component (22) rotates to drive the stretching shaft (23) circumferential movement avoids the lever, the main spring is stretched by the stretching shaft (23), and the free hook end of the main spring is stretched above the lever. At this time, the signal switching shaft (52) triggers the trigger switch (51), and the telescopic cylinder (31) pushes the clamp (4), and the main spring assembly device reaches the completion position; when the main spring assembly device moves from the transition position to the completion position, the clamp moving device (3) pushes the clamp (4) away from the main spring rotation installation device (2), and the free hook end of the main spring is separated from the stretching shaft (23), and the main spring is contracted by the elastic action and hooked on the lever.

2. The main spring assembly device according to claim 1, wherein The rotating assembly (22) comprises a rotating pad (221) and a rotating fixed plate (223); a limiting groove (222) is arranged on the rotating pad (221); a limiting hole (224) is arranged on the rotating fixed plate (223) corresponding to the limiting groove (222); the rotating fixed plate (223) cooperates with the rotating pad (221) to fix the end of the stretching shaft (23) in the limiting groove (222); and the stretching shaft (23) extends out of the rotating assembly (22) through the limiting hole (224).

3. The main spring assembly device according to claim 2, characterized in that, The rotating pad (221) is provided with a boss, and the rotating fixed plate (223) is provided with a yielding structure corresponding to the boss.

4. The main spring assembly device according to claim 2, characterized in that, A fixing device (25) is also correspondingly arranged on the rotating backing plate (221) and the rotating fixing plate (223).

5. The main spring assembly device according to claim 1, characterized in that, The stretching shaft (23) is designed in sections and includes a lower section for fixing on the rotating assembly (22) and an upper section for hooking the main spring. The diameter of the lower section is larger than that of the upper section.

6. The main spring assembly device according to claim 1, characterized in that, The fixture moving device (3) is located below the main spring rotating mounting device (2).

7. The main spring assembly device according to claim 1, characterized in that, The fixture (4) includes a positioning block and a positioning rod. The positioning block is adapted to the outer contour of the operating mechanism, and the positioning rod fixes the parts in the operating mechanism.

8. The main spring assembly device according to claim 1, characterized in that, The bracket (1) includes a base (11), a support column (12), and a position adjusting clamp (13). The support column (12) is fixed on the base (11), the position adjusting clamp (13) is arranged on the support column (12), and the main spring rotating mounting device (2) is connected to the position adjusting clamp (13).

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