Circuit breaker transmission gear structure

Abstract

The utility model discloses a circuit breaker transmission gear structure, which comprises a driving device and a transmission gear body connected with the output end of the driving device, a lower gasket is arranged between the driving device and the transmission gear body, and the circuit breaker transmission gear structure is characterized in that a rotating hole is formed in the center of the surface of the transmission gear body; a rotating boss is fixedly connected to the position, opposite to the rotating hole, of the front end of the surface of the transmission gear body, and a plurality of connecting bosses are fixedly connected to the position, located on the outer side of the rotating boss, of the surface of the transmission gear body. Through the collaborative design of radial constraint of the connecting bosses and the connecting rings, axial limiting of the convex rings and direct driving of the rotating bosses, the problems of failure, reversion and energy storage faults caused by overlarge load or frequent operation of a traditional transmission gear are fundamentally solved; and the reliability and durability of the circuit breaker under complex working conditions are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to a circuit breaker transmission gear structure. Background Technology

[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions, and capable of closing, carrying, and interrupting current under abnormal circuit conditions within a specified time. Circuit breakers are classified into high-voltage circuit breakers and low-voltage circuit breakers according to their application range. The boundary between high and low voltage is somewhat blurred; generally, those above 3kV are considered high-voltage electrical appliances. Circuit breakers can be used to distribute electrical energy, infrequently start asynchronous motors, and protect power lines and motors. When serious overloads, short circuits, or undervoltage faults occur, they can automatically disconnect the circuit. Their function is equivalent to a combination of a fuse switch and over / under-temperature relays. Moreover, generally no parts need to be replaced after interrupting a fault current. Currently, they have gained widespread application.

[0003] The transmission gears used in existing circuit breakers often fail due to excessive load or too many operations. This leads to unstable transmission, causing overall reversal and inability to manually store energy, which greatly reduces the reliability of the product during use. Summary of the Invention

[0004] The purpose of this utility model is to provide a circuit breaker transmission gear structure to solve the problem mentioned in the background art that the transmission gears used in existing circuit breakers often fail due to excessive load or too many operations, resulting in unstable transmission, overall reversal, and inability to manually store energy, which greatly reduces the reliability of the product during use.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a circuit breaker transmission gear structure, including a driving device and a transmission gear body connected to the output end of the driving device, wherein a lower shim is provided between the driving device and the transmission gear body, characterized in that: a rotating hole is provided at the center of the surface of the transmission gear body, a rotating boss is fixedly connected to the front end of the surface of the transmission gear body at a position opposite to the rotating hole, and multiple connecting bosses are fixedly connected to the surface of the transmission gear body outside the rotating boss.

[0006] Preferably, the plurality of connecting bosses are designed to surround the rotating boss.

[0007] Preferably, the lower gasket is fixedly connected to the output end surface of the drive device, the surface of the lower gasket has a through hole, a connecting ring is fixedly connected to the surface of the lower gasket at the through hole, and the inner wall of the connecting ring is in contact with the outer wall surface of the connecting boss.

[0008] Preferably, the output shaft of the drive device passes through the through hole and contacts the inner wall of the rotating boss.

[0009] Preferably, the lower gasket has an outwardly protruding ring fixedly connected to one end face near the transmission gear body, and the outer wall of the protruding ring abuts against the surface of the transmission gear body.

[0010] Beneficial effects

[0011] Compared with existing technologies, the beneficial effects of this utility model are as follows:

[0012] This invention fundamentally solves the problems of failure, reversal, and energy storage failure caused by excessive load or frequent operation of traditional transmission gears through the radial constraint of multiple connecting bosses and connecting rings, the axial limit of the bosses, and the direct drive of the rotating bosses. This significantly improves the reliability and durability of circuit breakers under complex operating conditions. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the transmission gear body structure of this utility model.

[0016] The correspondence between the labels and component names in the attached figures is as follows:

[0017] 1. Drive unit; 2. Transmission gear body; 3. Lower shim; 21. Rotating hole; 22. Rotating boss;

[0018] 23. Connecting boss; 31. Through hole; 32. Connecting ring; 33. Raised ring. Detailed Implementation

[0019] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "front," "rear," "inner," "outer," "vertical," and "horizontal," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] like Figure 1-3 This is a schematic diagram of a preferred embodiment of the circuit breaker transmission gear structure of this utility model. In this embodiment, the circuit breaker transmission gear structure includes a drive device 1 using a miniature DC motor, whose output end is a 6mm diameter metal output shaft. The transmission gear body 2 is injection molded from nylon and glass fiber material, and a rotating hole 21 is formed at the center of its surface. A cylindrical rotating boss 22 with a height of 3mm is fixedly connected to the front end of the transmission gear body 2, and this rotating boss 22 is coaxial with the rotating hole 21. Six connecting bosses 23 with a height of 2.5mm are evenly distributed around the rotating boss 22, and the spacing angle of the connecting bosses 23 is 60°.

[0022] In this embodiment, the lower gasket 3 is made of stainless steel and is fixed to the output end surface of the motor 1 by laser welding. A through hole 31 is formed in the center of the lower gasket 3, and a connecting ring 32 with a height of 2mm is integrally formed around the edge of the through hole 31. The inner wall of the connecting ring 32 is in close contact with the outer wall of the connecting boss 23 of the transmission gear body 2, forming a multi-tooth meshing support. This design significantly disperses the radial load during transmission, avoids local deformation or breakage caused by stress concentration, effectively prevents the overall reversal of the gear due to sudden load changes, and ensures stable transmission trajectory.

[0023] In this embodiment, the output shaft of the drive device 1 passes through the through hole 31 and the rotating hole 21 in sequence and then directly contacts the inner wall of the rotating boss 22. At the same time, the engagement between the connecting boss 23 and the connecting ring 32 further constrains the radial displacement. This ensures the precise concentricity of the output shaft of the drive device 1 and the transmission gear body 2, eliminates transmission backlash, improves energy transfer efficiency, and avoids the problem of manual energy storage failure.

[0024] In this embodiment, the lower shim 3 has an annular convex ring 33 with a height of 0.8mm on the end face facing the transmission gear body 2. After assembly, the outer wall of the convex ring 33 forms an axial abutment with the surface of the transmission gear body 2 to prevent the transmission gear body 2 from moving axially. This structure can offset the gear tilting caused by asymmetrical force and reduce the wear loss between the gear and the drive shaft. Especially under frequent operation or high load conditions, it can significantly reduce the gear failure rate.

[0025] Work process:

[0026] When the drive unit 1 drives the output shaft to rotate, the output shaft of the drive unit 1 contacts the rotating boss 22, and the rotating boss 22 drives the transmission gear body 2 to rotate. At the same time, the mating structure of the connecting boss 23 and the connecting ring 32 disperses the radial load when the gear meshes. The convex ring 33 of the lower shim 3 provides axial support, which fundamentally solves the problems of failure, reversal and energy storage failure caused by excessive load or frequent operation of traditional transmission gears, and greatly improves the reliability and durability of the circuit breaker under complex working conditions.

[0027] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. A circuit breaker transmission gear structure, comprising a drive device (1) and a transmission gear body (2) connected to the output end of the drive device (1), wherein a lower shim (3) is provided between the drive device (1) and the transmission gear body (2), characterized in that: A rotating hole (21) is provided at the center of the surface of the transmission gear body (2). A rotating boss (22) is fixedly connected to the front end of the surface of the transmission gear body (2) at the position opposite to the rotating hole (21). Multiple connecting bosses (23) are fixedly connected to the surface of the transmission gear body (2) outside the rotating boss (22).

2. The circuit breaker transmission gear structure according to claim 1, characterized in that: The multiple connecting bosses (23) are designed around the rotating boss (22).

3. The circuit breaker transmission gear structure according to claim 1, characterized in that: The lower pad (3) is fixedly connected to the output end surface of the drive device (1). A through hole (31) is provided on the surface of the lower pad (3). A connecting ring (32) is fixedly connected to the surface of the lower pad (3) at the through hole (31), and the inner wall of the connecting ring (32) is in contact with the outer wall surface of the connecting boss (23).

4. The circuit breaker transmission gear structure according to claim 1, characterized in that: The output shaft of the drive device (1) passes through the through hole (31) and contacts the inner wall of the rotating boss (22).

5. The circuit breaker transmission gear structure according to claim 4, characterized in that: The lower gasket (3) has an outwardly protruding ring (33) fixedly connected to one end face near the transmission gear body (2), and the outer wall of the ring (33) abuts against the surface of the transmission gear body (2).

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