Circuit breaker electric operating mechanism with long service life

Abstract

The utility model discloses a breaker electric operation mechanism with long service life, comprising a mounting rack, a driving motor, a transmission assembly, a support wheel, a main shaft and a planetary gear assembly, the driving motor is mounted on the mounting rack, the support wheel is rotatably arranged on the mounting rack through the main shaft, and the driving motor is connected with the main shaft through the transmission assembly. The planetary gear assembly comprises an inner gear and multiple sets of duplex planetary gears, a transmission gear is arranged on the main shaft, the inner gear is in meshed connection with the three sets of duplex planetary gears, a gear shaft is arranged on one side of the inner gear, a cover plate is arranged on one side of the mounting frame, and a shaft hole is formed in the cover plate; and the supporting ring is made of a plastic material, is arranged on the shaft hole of the cover plate, and is sleeved on the periphery of the gear shaft. The plastic part is arranged on the shaft hole of the cover plate and used for being matched with the gear shaft, the perpendicularity of the gear shaft of the inner gear is guaranteed, abrasion between the cover plate of the mounting frame and the gear shaft of the inner gear is reduced, and the service life of the circuit breaker electric operation mechanism is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of voltage switching equipment technology, and in particular to a long-life circuit breaker operating mechanism. Background Technology

[0002] The circuit breaker's operating mechanism is a crucial component of the circuit breaker, responsible for controlling its opening and closing. It primarily consists of a motor, a reducer, and a rotating mechanism. When used in conjunction with a control system, it enables the switching control of the circuit breaker and provides electrical protection.

[0003] The applicant's earlier Chinese utility model patent application, CN202121040238.9, discloses an electrical operating mechanism for a circuit breaker, comprising a mounting frame, a drive motor, a transmission assembly, a support wheel, a planetary gear assembly, and a micro switch. The drive motor and micro switch are mounted on the mounting frame. The micro switch has a spring. The support wheel is rotatably mounted on the mounting frame via a main shaft. The drive motor is connected to the main shaft via the transmission assembly. The planetary gear assembly includes an internal gear and three sets of double planetary gears arranged in a circular array. The main shaft has an upper transmission gear for meshing with the three sets of double planetary gears. The internal gear meshes with the three sets of double planetary gears. In this structure, the internal gear has a gear shaft, and a cover plate on one side of the mounting frame has a shaft hole for mates with the gear shaft. In actual use, this structure has the following problems:

[0004] 1. Because the shaft hole on the cover plate is processed by the iron plate stretching process, it is impossible to maintain the consistency of the stretching hole (shaft hole) at the top and bottom.

[0005] 2. Since internal gears are generally made of zinc-aluminum alloy, wear will occur when the gear shaft of the internal gear mates with the shaft hole on the cover plate, resulting in a shorter product life.

[0006] Therefore, it is essential to improve the above structure in order to extend the service life of the circuit breaker's operating mechanism. Utility Model Content

[0007] The purpose of this invention is to provide a long-life circuit breaker operating mechanism. This invention provides a plastic part on the shaft hole of the mounting bracket cover for cooperating with the gear shaft of the internal gear. This not only ensures the perpendicularity of the internal gear shaft, but also reduces the wear between the mounting bracket cover and the internal gear shaft, thus significantly improving the service life of the circuit breaker operating mechanism.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a high-life circuit breaker operating mechanism, comprising a mounting frame, a drive motor, a transmission assembly, a support wheel, a main shaft, and a planetary gear assembly. The drive motor is mounted on the mounting frame, and the support wheel is rotatably mounted on the mounting frame via the main shaft. The drive motor is connected to the main shaft via the transmission assembly. The planetary gear assembly includes an internal gear and multiple sets of double planetary gears arranged in a circumferential array. The main shaft is provided with a transmission gear for meshing with three sets of double planetary gears. The internal gear meshes with the three sets of double planetary gears. A gear shaft is provided on one side of the internal gear, and a cover plate is provided on one side of the mounting frame. The cover plate has a shaft hole for the gear shaft to pass through. It also includes a support ring made of plastic material, which is mounted on the shaft hole of the cover plate and sleeved around the outer circumference of the gear shaft.

[0009] By adopting the above technical solution, a support ring is set between the shaft hole of the cover plate and the gear shaft of the internal gear to separate them. The support ring replaces the original tension hole of the shaft hole to support the gear shaft. Since the support ring is made of plastic injection molding, the perpendicularity of the gear shaft can be guaranteed. The gear shaft and the cover plate are made of zinc-aluminum alloy and iron, respectively. Setting the plastic support ring between the two can effectively reduce the wear of the gear shaft and the cover plate, thereby improving the service life of the circuit breaker's electrical operating mechanism.

[0010] The present invention is further configured such that one end of the support ring is integrally provided with a sleeve portion, and the sleeve portion is sleeved on the outer periphery of the gear shaft.

[0011] By adopting the above technical solution, the sleeve portion is designed to increase the support surface between the support ring and the gear shaft, thereby improving the stability of the support structure.

[0012] The present invention is further configured such that the inner circular surface of the shaft hole of the cover plate is provided with a plurality of locking blocks, the outer circular surface of the support ring is provided with a plurality of arc-shaped locking grooves extending circumferentially and a plurality of inlet and outlet sliding grooves extending axially from the end of the support ring and connected to one end of the corresponding arc-shaped locking groove, and the locking blocks slide into the corresponding arc-shaped locking grooves through the corresponding inlet and outlet sliding grooves.

[0013] By adopting the above technical solution, during installation, the support ring is passed through the shaft hole on the cover plate, so that the locking block on the shaft hole extends into the corresponding inlet and outlet sliding groove on the support ring. Then, the support ring is rotated so that the locking block on the shaft hole slides into the arc-shaped locking groove on the support ring, thus realizing the installation of the support ring. The installation operation is very convenient, and disassembly is also only a matter of reversing the operation.

[0014] The present invention is further configured such that the height of the arc-shaped locking groove gradually decreases in the direction away from the inlet / outlet slide groove, and when the locking block slides to the inner end of the arc-shaped locking groove, the locking block and the arc-shaped locking groove are interference-fitted.

[0015] By adopting the above technical solution, the arc-shaped locking groove, which is larger on the outside and smaller on the inside, can achieve the effect of locking the support ring onto the cover plate by twisting the support ring. The structure is simple and the operation is very convenient.

[0016] The present invention is further configured such that, when the support ring engages with the shaft hole, the rotation direction of the arc-shaped locking groove relative to the locking block is the same as the rotation direction of the gear shaft.

[0017] By adopting the above technical solution, during the operation of the gear shaft driven by the internal gear, a rotational force is applied to the support ring, which makes the locking block on the shaft hole and the arc-shaped locking groove on the support ring fit tighter and tighter, giving it a self-locking function and better structural reliability.

[0018] The present invention is further configured such that a tapered reinforcing portion is provided at the junction of the outer circular surface of the gear shaft and the internal gear, a tapered flare is provided at the inner end of the support ring, and a clearance gap is provided between the tapered flare and the tapered reinforcing portion.

[0019] By adopting the above technical solution, not only can the strength of the gear shaft be improved, making it less prone to bending, but it can also facilitate the insertion of the gear shaft into the support ring, thus simplifying the assembly operation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of this utility model after removing the internal gear.

[0022] Figure 3 This is a cross-sectional view of the entire utility model;

[0023] Figure 4 This is a schematic diagram of the mating structure between the faceplate and the support ring of this utility model;

[0024] Figure 5 This is an exploded view of the faceplate and support ring structure of this utility model;

[0025] Figure 6 This is a schematic diagram of the support ring structure of this utility model.

[0026] In the diagram: 1. Mounting bracket; 2. Drive motor; 3. Drive motor; 4. Support wheel; 5. Planetary gear assembly; 6. Main shaft; 7. Internal gear; 8. Double planetary gear; 9. Transmission gear; 10. Gear shaft; 11. Cover plate; 12. Shaft hole; 13. Support ring; 14. Sleeve section; 15. Clamping block; 16. Arc-shaped locking groove; 17. Inlet / outlet slide groove; 18. Conical reinforcing section; 19. Conical flare; 20. Clearance. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example: As attached Figures 1-6 The diagram illustrates a high-lifespan circuit breaker operating mechanism, comprising a mounting frame 1, a drive motor 2, a transmission assembly 3, a support wheel 4, a main shaft 6, and a planetary gear assembly 5. The drive motor 2 is mounted on the mounting frame 1. The support wheel 4 is rotatably mounted on the mounting frame 1 via the main shaft 6. The drive motor 2 is connected to the main shaft 6 via the transmission assembly 3. The planetary gear assembly 5 includes an internal gear 7 and multiple sets of double planetary gears 8 arranged in a circular array. The main shaft 6 is provided with a transmission gear 9 for meshing with three sets of double planetary gears 8. The internal gear 7 meshes with the three sets of double planetary gears 8. A gear shaft 10 is integrally provided on one side of the internal gear 7. A cover plate 11 is provided on one side of the mounting bracket 1. The cover plate 11 is provided with a shaft hole 12 for the gear shaft 10 to pass through. In this embodiment, the internal gear 7 is made of zinc-aluminum alloy, and the cover plate 11 is made of iron. The electrical operating mechanism of the circuit breaker also includes a support ring 13 made of plastic material. The support ring 13 is installed on the shaft hole 12 of the cover plate 11 and is sleeved on the outer periphery of the gear shaft 10. A support ring 13 is provided between the shaft hole 12 of the cover plate 11 and the gear shaft 10 of the internal gear 7 to separate them. The support ring 13 replaces the original tension hole of the shaft hole 12 to support the gear shaft 10. Since the support ring 13 is made of plastic injection molding, it can ensure the perpendicularity of the gear shaft 10. The gear shaft 10 and the cover plate 11 are made of zinc-aluminum alloy and iron, respectively. The plastic support ring 13 placed between the two can effectively reduce the wear of the gear shaft 10 and the cover plate 11, thereby improving the service life of the circuit breaker's electrical operating mechanism.

[0029] As attached Figure 6 As shown, a sleeve portion 14 is integrally provided at one end of the support ring 13, and the sleeve portion 14 is sleeved on the outer periphery of the gear shaft 10. The sleeve portion 14 increases the support surface between the support ring 13 and the gear shaft 10, thereby improving the stability of the support structure.

[0030] As attached Figures 4-6As shown, in this embodiment, four locking blocks 15 are evenly arranged on the inner circular surface of the shaft hole 12 of the cover plate 11, and four circumferentially extending arc-shaped locking grooves 16 and four axially extending inlet / outlet sliding grooves 17 connected to one end of the corresponding arc-shaped locking grooves 16 are provided on the outer circular surface of the support ring 13. The locking blocks 15 slide into the corresponding arc-shaped locking grooves 16 through the corresponding inlet / outlet sliding grooves 17. During installation, the support ring 13 is passed through the shaft hole 12 on the cover plate 11, so that the locking blocks 15 on the shaft hole 12 extend into the corresponding inlet / outlet sliding grooves 17 on the support ring 13. Then, the support ring 13 is rotated so that the locking blocks 15 on the shaft hole 12 slide into the arc-shaped locking grooves 16 on the support ring 13, thus realizing the installation of the support ring 13. The installation operation is very convenient, and disassembly is also only a matter of reversing the operation.

[0031] As attached Figures 4-6 As shown, the arc-shaped locking groove 16 gradually decreases in height away from the inlet / outlet slide groove 17. When the locking block 15 slides to the inner end of the arc-shaped locking groove 16, the locking block 15 and the arc-shaped locking groove 16 are interference-fitted. The design of the arc-shaped locking groove 16, which is larger on the outside and smaller on the inside, allows the support ring 13 to be locked onto the cover plate 11 by twisting the support ring 13. That is, the fit between the two goes from loose to tight. The fit structure is simple and the operation is very convenient.

[0032] When the support ring 13 engages with the shaft hole 12, the rotation direction of the arc-shaped locking groove 16 relative to the locking block 15 is the same as the rotation direction of the gear shaft 10. During the operation of the gear shaft 10 driven by the internal gear 7, a rotational force is applied to the support ring 13, causing the locking block 15 on the shaft hole 12 and the arc-shaped locking groove 16 on the support ring 13 to engage more and more tightly, thus providing a self-locking function and improving structural reliability.

[0033] As attached Figure 3 As shown, a tapered reinforcing portion 18 is provided at the junction of the outer circular surface of the gear shaft 10 and the internal gear 7, and a tapered flare 19 is provided at the inner end of the support ring 13, with a clearance gap 20 between the tapered flare 19 and the tapered reinforcing portion 18. This design not only improves the strength of the gear shaft 10, making it less prone to bending, but also facilitates the insertion of the gear shaft 10 into the support ring 13, simplifying the assembly operation.

Claims

1. A high-life circuit breaker operating mechanism, comprising a mounting frame (1), a drive motor (2), a transmission assembly (3), a support wheel (4), a main shaft (6), and a planetary gear assembly (5), wherein the drive motor (2) is mounted on the mounting frame (1), the support wheel (4) is rotatably mounted on the mounting frame (1) via the main shaft (6), the drive motor (2) is connected to the main shaft (6) via the transmission assembly (3), the planetary gear assembly (5) includes an internal gear (7) and multiple sets of double planetary gears (8) arranged in a circumferential array, the main shaft (6) is provided with a transmission gear (9) for meshing with three sets of double planetary gears (8), the internal gear (7) meshes with three sets of double planetary gears (8), a gear shaft (10) is provided on one side of the internal gear (7), a cover plate (11) is provided on one side of the mounting frame (1), and a shaft hole (12) for the gear shaft (10) to pass through is provided on the cover plate (11); characterized in that: It also includes a support ring (13) made of plastic material, which is installed on the shaft hole (12) of the cover plate (11) and is sleeved on the outer periphery of the gear shaft (10).

2. A high life electric operating mechanism of a circuit breaker according to claim 1, characterized in that: One end of the support ring (13) is integrally provided with a sleeve portion (14), which is sleeved on the outer periphery of the gear shaft (10).

3. A high life expectancy electric operating mechanism of a circuit breaker according to claim 1, characterized in that: The cover plate (11) has multiple locking blocks (15) on the inner circular surface of the shaft hole (12), and the support ring (13) has multiple circumferentially extending arc-shaped locking grooves (16) and multiple inlet and outlet sliding grooves (17) extending axially from the end of the support ring (13) and connected to one end of the corresponding arc-shaped locking groove (16). The locking blocks (15) slide into the corresponding arc-shaped locking grooves (16) through the corresponding inlet and outlet sliding grooves (17).

4. A high life electric operating mechanism of a circuit breaker according to claim 3, characterized in that: The height of the arc-shaped locking groove (16) gradually decreases in the direction away from the inlet / outlet slide groove (17). When the locking block (15) slides to the inner end of the arc-shaped locking groove (16), the locking block (15) and the arc-shaped locking groove (16) are in an interference fit.

5. A high life expectancy electric operating mechanism of a circuit breaker according to claim 4, characterized in that: When the support ring (13) engages with the shaft hole (12), the rotation direction of the arc-shaped locking groove (16) relative to the locking block (15) is the same as the rotation direction of the gear shaft (10).

6. A high life expectancy electric operating mechanism of a circuit breaker according to claim 1, characterized in that: A tapered reinforcing part (18) is provided at the junction of the outer circular surface of the gear shaft (10) and the internal gear (7), and a tapered flare (19) is provided at the inner end of the support ring (13), and a clearance gap (20) is provided between the tapered flare (19) and the tapered reinforcing part (18).

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