Circuit breaker operating mechanism

Abstract

The utility model relates to a breaker operating mechanism, which comprises a frame body, an opening shaft and an opening spring, a swing frame is fixedly connected on the opening shaft, a T-shaped rod-shaped support sleeve is rotatably arranged on the swing frame, the large head end of the support sleeve is rotatably connected with the swing frame, and a shaft hole penetrating through the support sleeve towards one end is formed in the center of the support sleeve. A rotating supporting shaft is rotatably arranged on the frame body, a telescopic shaft is fixedly connected to the rotating supporting shaft, one end of the telescopic shaft penetrates into the shaft hole, an abutting plate is fixedly connected to the telescopic shaft, and the small head end of the supporting sleeve is sleeved with the opening spring so that the two ends of the opening spring can abut against the large head end of the supporting pipe and the abutting plate respectively. According to the circuit breaker operating mechanism, the action of the opening spring is realized through the relative sliding of the telescopic shaft and the supporting sleeve in the axial direction, so that the opening spring is kept on the small head end of the supporting sleeve in the action process and does not generate radial deviation, the stability of the opening spring in the action process is ensured, and the stability of the circuit breaker in the working process is further ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a circuit breaker operating mechanism. Background Art

[0002] The operating mechanism of the circuit breaker is used to realize the opening and closing actions of the circuit breaker. When closing, the opening spring is compressed, and the restoring force of the opening spring drives the opening shaft to rotate to realize opening. In order to ensure the stability of the opening spring during operation, for example, the utility model patent: A closing spring limiting device (publication number: CN216902759U) discloses a structure that can effectively limit the spring, improve the stability of the spring during movement, avoid the opening rod from being stuck, and cause the circuit breaker to refuse to close or open or not open or close in place, thereby ensuring the normal operation of the circuit breaker. In the above structure, although the limiting cavity formed by the mounting frame, the outer limiting rib, the upper limiting rib and the lower limiting rib can limit the spring to a certain extent, it cannot completely prevent the radial deviation of the spring relative to the opening rod, and the stability of the opening spring needs to be improved.

[0003] In view of the above problems, the present invention makes improvements. Utility Model Content

[0004] The utility model provides a circuit breaker operating mechanism, which solves the above-mentioned problems existing in the prior art during use.

[0005] The technical solution of the present utility model is achieved as follows:

[0006] A circuit breaker operating mechanism includes a frame, a trip shaft and a trip spring, the trip shaft being rotatably arranged on the frame, the trip shaft being fixedly connected to a swing frame, the swing frame being rotatably provided with a support sleeve in the shape of a T-rod, the large head end of the support sleeve being rotatably connected to the swing frame and an axial hole passing through the support sleeve to one end is formed in the center of the support sleeve, the frame being rotatably provided with a rotation support shaft, the rotation support shaft being fixedly connected to a telescopic shaft matching the axial hole, one end of the telescopic shaft being inserted into the axial hole and an abutment plate being fixedly connected to the telescopic shaft, the trip spring being sleeved on the small head end of the support sleeve so that the two ends of the trip spring respectively abut against the large head end of the support tube and the abutment plate.

[0007] Preferably, the swing frame is composed of an upper plate, a lower plate and a connecting rod, the upper plate and the lower plate are fixedly connected to the opening shaft, and a plurality of the connecting rods are located between the upper plate and the lower plate and are fixedly connected to the upper plate and the lower plate.

[0008] Preferably, a connecting groove matching the connecting rod is provided on the end surface of the large end of the support sleeve, and the large end of the support sleeve rests on one of the connecting rods to keep the connecting rod in the connecting groove.

[0009] Preferably, a support plate located on one side of the swing frame is fixedly provided on the frame body, and a buffer block located on the swing path of one of the connecting rods is fixedly provided on the support plate.

[0010] Preferably, a limiting protrusion extending into the opening spring is formed on the end surface of the abutment plate.

[0011] Preferably, a threaded hole is provided on the rotation support shaft, and the telescopic shaft is threaded into the threaded hole.

[0012] Preferably, the outer surface of the support sleeve is formed with first reinforcing ribs extending along the axial direction of the support sleeve and second reinforcing ribs extending along the circumferential direction of the support sleeve, which are staggered with each other.

[0013] To sum up, the beneficial effect of the present invention is that the compression or rebound action of the trip spring is realized by the relative sliding of the telescopic shaft and the support sleeve in the axial direction, so that the trip spring remains on the small head end of the support sleeve during the action and will not produce radial deviation from the support sleeve, that is, the rebound force generated after the compression of the trip spring can act stably on the swing frame along the axial direction of the support sleeve to make it swing and drive the trip shaft to rotate to realize tripping, thereby ensuring the stability of the trip spring during action, and then ensuring the stability of the circuit breaker during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 This is a structural diagram of the utility model from another perspective;

[0017] Figure 3 This is an exploded schematic diagram of the utility model;

[0018] Figure 4 This is a schematic structural diagram of the swing frame in the utility model;

[0019] Figure 5 It is a structural schematic diagram of the support sleeve, telescopic shaft and opening spring in the utility model.

[0020] In the figure: 1. Frame; 2. Disconnecting shaft; 3. Disconnecting spring; 4. Swinging frame; 41. Upper plate; 42. Lower plate; 43. Connecting rod; 5. Support sleeve; 51. Shaft hole; 52. Connecting groove; 53. First reinforcing rib; 54. Second reinforcing rib; 6. Rotating support shaft; 61. Screw hole; 7. Telescopic shaft; 8. Abutment plate; 81. Limiting protrusion; 9. Support plate; 91. Buffer block. DETAILED DESCRIPTION

[0021] The following is a combination of the appended examples of the present invention Figure 1-5 , clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0022] As shown in the figure, a circuit breaker operating mechanism includes a frame 1, a trip shaft 2 and a trip spring 3, the trip shaft 2 is rotatably set on the frame 1, the trip shaft 2 is fixedly connected to a swing frame 4, a T-shaped support sleeve 5 is rotatably set on the swing frame 4, the large head end of the support sleeve 5 is rotatably connected to the swing frame 4, and an axial hole 51 is formed in the center of the support sleeve 5 and passes through the support sleeve 5 to one end, a rotating support shaft 6 is rotatably set on the frame 1, a telescopic shaft 7 matching the axial hole 51 is fixedly connected to the rotating support shaft 6, one end of the telescopic shaft 7 passes through the axial hole 51 and an abutment plate 8 is fixedly connected to the telescopic shaft 7, the trip spring 3 is sleeved on the small head end of the support sleeve 5 so that the two ends of the trip spring 3 respectively abut the large head end of the support tube and the abutment plate 8.

[0023] Specifically, the structure of the swing frame 4 is as follows: the swing frame 4 is composed of an upper plate 41, a lower plate 42 and a connecting rod 43, the upper plate 41 and the lower plate 42 are fixedly connected to the opening shaft 2, and several of the connecting rods 43 are located between the upper plate 41 and the lower plate 42 and fixedly connected to the upper plate 41 and the lower plate 42. Through the above structure, the swing frame has high strength and is easy to process.

[0024] In the above structure, when the circuit breaker is closed, the swing frame 4 is swung toward the rotating support shaft 6 by the gear driven by the motor (the structure of the motor toggling the swing frame 4 through the gear belongs to the existing technology and will not be expanded here). The swing frame 4 drives the opening shaft 2 to rotate to close the circuit breaker and drives the support sleeve 5 to move. The support sleeve 5 drives the telescopic shaft 7 to move. Since one end of the support sleeve 5 is rotatably connected to the swing frame 4, and the telescopic shaft 7 is fixedly connected to the rotatable rotating support shaft 6, the swing of the swing frame 4 and the rotation of the rotating support shaft 6 cause the telescopic shaft 7 to slide axially relative to the support sleeve 5 in the shaft hole 51, so that the large end of the support sleeve 5 and the abutment plate 8 are close to each other to compress the opening spring 3. When the circuit breaker is opened, the opening shaft 2 is opened. The rebound force of the spring 3 drives the large end of the support sleeve 5 and the abutment plate 8 away from each other, so that the support sleeve 5 drives the swing frame 4 to swing away from the rotating support shaft 6 and drives the opening shaft 2 to rotate to achieve opening. Through the above structure, when the opening spring 3 is compressed or rebounded with the opening and closing action of the circuit breaker operating mechanism, it is radially limited by the small end of the support sleeve 5 and always remains stably on the small end of the support sleeve 5, and will not produce radial deviation with the support sleeve 5 and the telescopic shaft 7. The rebound force generated by the compression of the opening spring 3 can act stably on the swing frame 4 along the axial direction of the support sleeve 5 to make it swing and drive the opening shaft 2 to rotate to achieve opening, thereby ensuring the stability of the circuit breaker operating mechanism during action, and then ensuring the stability of the circuit breaker during operation.

[0025] In addition, on the basis of the above structure, a connecting groove 52 matching the connecting rod 43 is provided on the end face of the big end of the support sleeve 5, and the big end of the support sleeve 5 is against one of the connecting rods 43 to keep the connecting rod 43 in the connecting groove 52. The big end of the support sleeve 5 is rotatably connected to the swing frame 4 through the cooperation of the connecting groove 52 and the connecting rod 43. In addition, this structure can realize the separation of the support sleeve 5 and the swing frame 4 by pushing the support sleeve 5 away from the swing frame 4 so that the connecting rod 43 withdraws from the connecting groove 52, thereby realizing the disassembly of the trip spring 3. While facilitating the operation during assembly, it is also convenient for replacing and maintaining the trip spring 3, so that the trip spring 3 maintains good performance to drive the swing frame 4 to realize the tripping action of the circuit breaker.

[0026] In addition, on the basis of the above structure, a support plate 9 located on one side of the swing frame 4 is fixedly provided on the frame body 1, and a buffer pad 91 located on the swing path of one of the connecting rods 43 is fixedly provided on the support plate 9. When the swing frame 4 swings under the action of the rebound force of the opening spring 3 to perform the opening action of the circuit breaker, the buffer pad 91 located on the swing path of the connecting rod 43 conflicts with the connecting rod 43, which has a buffering effect on the rapid swing of the swing frame 4, reduces the overall vibration when the circuit breaker operating mechanism is opened, and also reduces the noise when the circuit breaker operating mechanism is opened.

[0027] In addition, based on the above structure, a limiting protrusion 81 extending into the opening spring 3 is formed on the end face of the abutment plate 8. The limiting protrusion 81 plays a radial limiting role on the end of the opening spring 3, and cooperates with the small head end of the support sleeve 5 to further enhance the stability of the opening spring 3 on the support sleeve 5, thereby preventing the opening spring 3 from generating radial deviation.

[0028] In addition, on the basis of the above structure, a threaded hole 61 is opened on the rotating support shaft 6, and the telescopic shaft 7 is threaded in the threaded hole 61 to realize a fixed connection with the rotating support shaft 6. By rotating the telescopic shaft 7, it is caused to move axially relative to the support sleeve 5 on the rotating support shaft 6, and the abutment plate 8 is driven to move to adjust the distance between the abutment plate 8 and the large end of the support sleeve 5, thereby realizing the adjustment of the preload of the opening spring 3, so as to adjust the size of the rebound force of the opening spring 3 after compression, meet the requirements of different opening speeds, and have better practicality.

[0029] In addition, based on the above structure, the outer surface of the support sleeve 5 is formed with first reinforcing ribs 53 extending axially along the support sleeve 5 and second reinforcing ribs 54 extending circumferentially along the support sleeve 5, which are staggered with each other. The first reinforcing ribs 53 and the second reinforcing ribs 54 strengthen the strength of the support sleeve 5, so that it can withstand greater forces without causing radial and axial deformation, thereby ensuring the stability and durability of the circuit breaker operating mechanism during opening and closing operations.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A circuit breaker operating mechanism, comprising a frame (1), a trip shaft (2) and a trip spring (3), wherein the trip shaft (2) is rotatably arranged on the frame, and is characterized in that: The trip shaft (2) is fixedly connected to a swing frame (4), and a T-shaped support sleeve (5) is rotatably provided on the swing frame (4). The large end of the support sleeve (5) is rotatably connected to the swing frame (4), and an axial hole (51) is formed in the center of the support sleeve (5) and passes through the support sleeve (5) toward one end. A rotating support shaft (6) is rotatably provided on the frame body (1), and a telescopic shaft (7) matching the axial hole (51) is fixedly connected to the rotating support shaft (6). One end of the telescopic shaft (7) passes into the axial hole (51), and an abutment plate (8) is fixedly connected to the telescopic shaft (7). The trip spring (3) is sleeved on the small end of the support sleeve (5) so that the two ends of the trip spring (3) respectively abut against the large end of the support tube and the abutment plate (8).

2. The circuit breaker operating mechanism according to claim 1, characterized in that: The swing frame (4) is composed of an upper plate (41), a lower plate (42) and a connecting rod (43); the upper plate (41) and the lower plate (42) are fixedly connected to the opening shaft (2); and a plurality of the connecting rods (43) are located between the upper plate (41) and the lower plate (42) and are fixedly connected to the upper plate (41) and the lower plate (42).

3. The circuit breaker operating mechanism according to claim 2, characterized in that: A connecting groove (52) matching the connecting rod (43) is provided on the end surface of the large end of the support sleeve (5), and the large end of the support sleeve (5) abuts against one of the connecting rods (43) to keep the connecting rod (43) in the connecting groove (52).

4. The circuit breaker operating mechanism according to claim 3, characterized in that: A support plate (9) located on one side of the swing frame (4) is fixedly provided on the frame body (1), and a buffer pad (91) located on the swing path of one of the connecting rods (43) is fixedly provided on the support plate (9).

5. The circuit breaker operating mechanism according to claim 4, characterized in that: A limiting protrusion (81) extending into the opening spring (3) is formed on the end surface of the abutment plate (8).

6. The circuit breaker operating mechanism according to claim 5, characterized in that: A screw hole (61) is provided on the rotation support shaft (6), and the telescopic shaft (7) is screwed into the screw hole (61).

7. The circuit breaker operating mechanism according to claim 6, characterized in that: The outer surface of the support sleeve (5) is formed with first reinforcing ribs (53) extending axially along the support sleeve (5) and second reinforcing ribs (54) extending circumferentially along the support sleeve (5), which are staggered with each other.

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