CN212934424U

CN212934424U - Operating mechanism of circuit breaker

Info

Publication number: CN212934424U
Application number: CN202022377742.XU
Authority: CN
Inventors: 陈斌; 丁晓辉; 缪佳春
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2021-04-09
Anticipated expiration: 2030-10-23

Abstract

An operating mechanism of a circuit breaker belongs to the technical field of low-voltage electrical appliances. Including a pair of curb plate, rotation setting energy storage lever subassembly and cam pack between a pair of curb plate, cam pack drive energy storage lever subassembly swing, energy storage lever subassembly includes a pair of lever piece and symmetry setting a pair of push shaft in a pair of lever piece outside, the cam outer fringe of cam pack with a pair of push shaft push press fit, characteristics are: the pair of pushing shafts are simultaneously connected with the connecting piece so as to realize that the pair of pushing shafts are connected into a whole. The advantages are that: the pushing shaft is not easy to deflect or break, the service life of the energy storage lever is prolonged, and the service life of the operating mechanism is further prolonged.

Description

Operating mechanism of circuit breaker

Technical Field

The utility model belongs to the technical field of low-voltage apparatus, concretely relates to operating device of circuit breaker.

Background

The conventional circuit breaker is widely used in low-voltage power supply and distribution systems due to its excellent protection characteristics. The circuit breaker comprises an operating mechanism for executing the on-off operation of the circuit breaker, and is a core component of the circuit breaker.

As shown in fig. 1 and 2, an operating mechanism of a conventional circuit breaker includes a pair of side plates 1. An energy storage lever component 2 and a cam component 4 are rotatably arranged between the pair of side plates 1, and a spring component 3 is also arranged between the pair of side plates 1. When the operating mechanism stores energy, the cam assembly 4 is driven by external force to rotate, the cam assembly 4 drives the energy storage lever assembly 2 to rotate after rotating, and the energy storage lever assembly 2 compresses the spring assembly 3 to realize energy storage of the operating mechanism.

The energy storage lever assembly 2 comprises a pair of lever pieces 21 arranged at intervals, pushing shafts 25 are arranged on the outer sides of the pair of lever pieces 21, the pair of pushing shafts 25 are respectively positioned on the outer sides of the pair of lever pieces 21, and the two pushing shafts 25 are symmetrically arranged. The pushing shaft 25 is located on one rotating end of the lever plate 21.

The pushing shaft 25 is fixed to the outer side of the lever piece 21 by a nut 253. The pressing shaft 25 includes a sleeve 251 and a shaft body 252. The shaft sleeve 251 is sleeved on one end of the shaft body 252 extending out of the lever piece 21, and the shaft body 252 is tightened by the nut 253 after passing through the lever piece 21, so that the push shaft 25 is fixedly mounted.

The transmission relation between the cam component 4 and the energy storage lever component 2 is as follows: the cam rim of the cam assembly 4 is in relatively pushing fit with the pushing shaft 25 at one rotating end of the energy storage lever assembly 2, and the pushing shaft 25 moves on the cam rim of the cam assembly 4. However, as the performance index of the circuit breaker is continuously improved, the pressure value of the energy storage spring is also continuously improved due to the improvement of the contact pressure, so that the acting force between the pushing shaft 25 and the outer edge of the cam assembly 4 is huge, the pushing shaft 25 is easy to deflect and even break to lose efficacy under heavy load, and therefore the circuit breaker mechanism has faults of difficult energy storage or incapability of storing energy and the like.

In view of the above-mentioned prior art, there is a need for a reasonable improvement in the structure of the operating mechanism of the existing circuit breaker. The applicant has therefore made an advantageous design, in the context of which the solution to be described below is made.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an operating device of circuit breaker, the axle of pushing away on it is difficult to take place the incline or break, prolongs the life-span of energy storage lever, and then prolongs operating device's life-span.

The utility model discloses a task is accomplished like this, an operating device of circuit breaker, including a pair of curb plate, rotation setting energy storage lever subassembly and cam pack between a pair of curb plate, cam pack drive energy storage lever subassembly swing, energy storage lever subassembly includes a pair of lever piece and a pair of push shaft that the symmetry set up on two lateral surfaces of a pair of lever piece, cam pack's cam outer fringe with the push shaft push press fit that bulldozes, thereby a pair of push shaft be connected with the connecting piece simultaneously and realize a pair of push shaft and connect as an organic wholely with the connecting piece.

In a specific embodiment of the present invention, the connecting member is a sleeve, the pair of pushing shafts includes a shaft sleeve and a shaft body, the shaft sleeve is sleeved on one end of the shaft body extending out of the outer side of the lever piece, and the shaft sleeve is used for pushing and matching with the outer edge of the cam assembly; the shaft bodies of the pair of pushing shafts are connected to both ends of the sleeve.

In another specific embodiment of the present invention, threaded holes are formed at both ends of the sleeve, and the shaft body is in threaded connection with both ends of the sleeve.

In a further specific embodiment of the present invention, the shaft sleeve is a rolling shaft sleeve.

In a further specific embodiment of the present invention, the two ends of the sleeve abut against the inner side surfaces of the pair of lever pieces.

In yet another specific embodiment of the present invention, the sleeve may extend into the corresponding hole on the lever plate or both ends of the sleeve may extend through the pair of lever plates, and the shaft body is connected to both ends of the sleeve by a screw.

In yet another specific embodiment of the present invention, the connecting member is a shaft, the two ends of the shaft extend through the pair of lever pieces, and the pushing shaft is mounted on the two extending ends of the shaft.

In a more specific embodiment of the present invention, the two protruding ends of the shaft rod are processed with external threads, the pushing shaft is processed with internal threads, and the pushing shaft is screwed on the protruding end of the shaft rod.

The utility model discloses owing to adopted above-mentioned structure, the beneficial effect who has: the pair of pushing shafts are connected through the connecting piece, so that the stability of the pushing shafts during operation is improved, the pushing shafts are prevented from deflecting or breaking, the service life of the energy storage lever assembly is prolonged, and the service life of the operating mechanism is prolonged.

Drawings

Fig. 1 is a schematic view of the internal structure of an operating mechanism according to the prior art.

Fig. 2 is a schematic diagram of the force applied to the pushing shaft on the energy storage lever assembly of the operating mechanism in the prior art.

Fig. 3 is a schematic view of the internal structure of the operating mechanism of the present invention.

Fig. 4 is a schematic view of an energy storage lever assembly of the operating mechanism of the present invention.

Fig. 5 is a partially exploded view of an embodiment of the energy storage lever assembly of the present invention.

Fig. 6 is a schematic view illustrating the installation of the pushing shaft in an embodiment of the energy storage lever assembly of the present invention.

Fig. 7 is a schematic view of the installation of the pushing shaft in another embodiment of the energy storage lever assembly of the present invention.

Fig. 8 is a schematic view of the installation of the pushing shaft in another embodiment of the energy storage lever assembly of the present invention.

In the figure: 1. side plates 11. a rotating shaft; 2. the energy storage lever assembly comprises 21 lever pieces, 22 fixing shafts, 23 swinging shafts, 24 rotating shaft sleeves, 25 pushing shafts, 251 shaft sleeves, 252 shaft bodies, 253 nuts; 3. a spring assembly; 4. a cam assembly; 100. a sleeve; 200. a shaft lever; 300. a gasket; 400. and a clamp spring.

Detailed Description

The following detailed description of the embodiments of the present invention will be described with reference to the accompanying drawings, but the description of the embodiments by the applicant is not intended to limit the technical solutions, and any changes made according to the present invention rather than the essential changes should be considered as the protection scope of the present invention.

In the following description, any concept relating to the directions or orientations of up, down, left, right, front, and rear is based on the position shown in the corresponding drawings, and thus should not be construed as particularly limiting the technical solution provided by the present invention.

Referring to fig. 1, the present invention relates to an operating mechanism of a circuit breaker, which includes a pair of side plates 1 disposed at an interval facing each other. The energy storage lever assembly 2 and the cam assembly 4 are rotatably arranged between the pair of side plates 1, the cam assembly 4 can drive the energy storage lever assembly 2 to swing, and when the cam assembly 4 is locked, the energy storage lever assembly 2 is locked. And a spring assembly 3 is also arranged between the pair of side plates 1, one end of the spring assembly 3 is propped against a fixed part between the pair of side plates 1, and the other end of the spring assembly 3 is propped against a rotating end of the energy storage lever assembly 2.

As shown in fig. 3 to 5, the energy storage lever assembly 2 includes a pair of lever plates 21 spaced apart from each other, and a fixing shaft 22 is disposed between the pair of lever plates 21. Two ends of the fixed shaft 22 are respectively connected with a lever piece 21, thereby ensuring the interval arrangement of the pair of lever pieces 21. A rotating shaft sleeve 24 is further arranged between the pair of lever pieces 21, the rotating shaft sleeve 24 is matched with a rotating shaft 11, and the rotating shaft 11 is arranged on the pair of side plates 1, so that the energy storage lever assembly 2 can swing around the rotating shaft 11 on the pair of side plates 1.

Referring to fig. 3 to 5, a swing shaft 23 is fixedly disposed at a swing end of the pair of lever plates 21, and the swing shaft 23 abuts against an end of the spring assembly 3. When the spring assembly 3 releases energy, i.e. expands, the swinging shaft 23 can be driven to move, so that the energy storage lever assembly 2 swings in one direction. When the operating mechanism stores energy, the energy storage lever assembly 2 is driven by the cam assembly 4 to drive the energy storage lever assembly 2 to swing towards the other direction, so that the spring assembly 3 is compressed through the swing shaft 23, and the purpose of storing energy is achieved.

With continued reference to fig. 3 to 5, a pressing shaft 25 is provided on the other swing end of the pair of lever pieces 21. The pair of pressing shafts 25 are symmetrically provided on both outer side surfaces of the pair of lever pieces 21. The push shaft 25 is engaged with the cam module 4. Specifically, the cam outer edge of the cam member 4 is press-fitted to the pair of pressing shafts 25. That is, when the cam module 4 rotates and the push shaft 25 moves on the outer edge of the cam module 4, the push shaft 25 swings, and the energy storage lever assembly 2 is driven to swing.

The utility model discloses a prevent that thrust last item 25 takes place the incline or break, prolong the life-span of energy storage lever subassembly 2, improved the fixed mode that bulldozes axle 25, so this technical scheme will a pair of pushing away last item 25 connect as an organic wholely through the connecting piece to improve the stability that pushes away last item 25. The manner in which the two thrust shafts 25 are connected will be specifically described below by way of three embodiments.

Example 1

As shown in fig. 4 to 6, in the present embodiment, the connecting member connected to the pair of pushing shafts 25 is a sleeve 100, that is, the two pushing shafts 25 are connected into a whole through the sleeve 100, and the sleeve 100 is used to replace a nut used for mounting the pushing shafts 25 in the prior art. The sleeve 100 is generally a metal sleeve, and two ends of the metal sleeve are provided with threaded holes, and further, the threaded holes at the two ends are communicated with each other to form a through threaded inner hole. The pressing shaft 25 includes a sleeve 251 and a shaft body 252. The sleeve 251 is fitted over the end of the shaft body 252 that protrudes outside the lever plate 21, and the sleeve 251 is circular to accommodate a push fit with the outer edge of the cam module 4. Preferably, the shaft sleeve 251 is a rolling shaft sleeve. So that when the sleeve 251 rolls on the cam outer edge of the cam module 4, the friction between the two can be effectively reduced. The shaft body 252 is generally cylindrical and can be inserted through a corresponding hole in the lever plate 21 and then be threadedly coupled to both ends of the sleeve 100.

In this embodiment, the shaft bodies 252 of the two pushing shafts 25 are fixedly connected through the sleeve 100, so that the pair of pushing shafts 25 are connected into a whole, the stability of the pushing shafts 25 is improved, the pushing shafts 25 are not easily deflected or broken after being stressed, and the problems in the prior art are solved. The sleeve 100 has both ends abutting on the inner side surfaces of the pair of lever pieces 21 for better stability.

In this embodiment, the sleeve 100 may further extend into corresponding holes on the lever pieces 21 or after both ends of the sleeve pass through the pair of lever pieces 21, the shaft body 252 is in threaded connection with both ends of the sleeve 100.

Example 2

As shown in fig. 7, in the present embodiment, the connecting member connected to the pair of pushing shafts 25 is a shaft 200, that is, the two pushing shafts 25 are connected to each other through the shaft 200. The shaft 200 is generally in the shape of a rod, preferably a round rod, and both ends of the shaft 200 penetrate the pair of lever pieces 21. Push shafts 25 are respectively mounted on both protruding ends of the shaft rod 200. The pushing shaft 25 and the shaft 200 can be fixedly mounted by means of a threaded connection. Specifically, external threads are processed on two protruding ends of the shaft rod 200, and correspondingly, internal threads are processed on the pushing shaft 25, so that the pushing shaft 25 is screwed on the protruding ends of the shaft rod 200. The push shaft 25 is preferably circular in shape to accommodate a push fit with the cam rim of the cam module 4. In this embodiment, the two pushing shafts 25 are connected into a whole by matching one shaft rod 200 with the two pushing shafts 25, so that the stability of the pushing shafts 25 is improved, and compared with the first embodiment, the first embodiment has the advantages of simpler structure and more reliability.

Example 3

As shown in fig. 8, the present embodiment is based on the same concept as the second embodiment. Except that the pressing shaft 25 and the shaft 200 are mounted in different manners. In this embodiment, the shaft part connected to the pair of pushing shafts 25 is a shaft 200, that is, the two pushing shafts 25 are connected to each other through the shaft 200. The shaft 200 is generally in the shape of a rod, preferably a round rod, and both ends of the shaft 200 penetrate the pair of lever pieces 21. Push shafts 25 are respectively mounted on both protruding ends of the shaft rod 200. The pushing shaft 25 and the shaft 200 are installed in a sleeved manner. Specifically, two protruding ends of the shaft rod 200 are stepped shafts, and correspondingly, a through hole is processed on the pushing shaft 25, so that the pushing shaft 25 is sleeved on the protruding ends of the shaft rod 200, sleeved with the gasket 300, and clamped by the clamp spring 400 to prevent the pushing shaft 25 from falling off. In this embodiment, the two pushing shafts 25 are connected into a whole by matching one shaft rod 200 with the two pushing shafts 25, so that the stability of the pushing shafts 25 is improved, and compared with the first embodiment, the first embodiment has the advantages of simpler structure and more reliability.

In the above embodiments, the connecting element is defined as one component, and based on the same invention, if the connecting element is a plurality of components, they are connected to each other, and they also belong to the category of the connecting element, and belong to the protection scope of the present invention. For example, a sleeve 100 as described in the first embodiment may be completed with two sleeves 100 plus a bolt. The two sleeves 100 are internally threaded at both ends, the two sleeves 100 are connected with each other by a bolt, and each sleeve 100 is in threaded connection with a thrust shaft 25. Likewise, the shaft 200 of the second embodiment may be a plurality of parts for the same reason that it is not repeated. The connector described in the aforementioned description [0009] should be an assembly of several parts.

Claims

1. The utility model provides an operating device of circuit breaker, includes a pair of curb plate (1), rotates energy storage lever subassembly (2) and cam pack (4) that set up between a pair of curb plate (1), cam pack (4) drive energy storage lever subassembly (2) swing, energy storage lever subassembly (2) include a pair of lever piece (21) and symmetry set up a pair of push shaft (25) on two lateral surfaces of a pair of lever piece (21), the cam outer fringe of cam pack (4) with push shaft (25) bulldoze cooperation, its characterized in that: the pair of pushing shafts (25) are simultaneously connected with the connecting piece, so that the pair of pushing shafts (25) are connected into a whole.

2. The operating mechanism of a circuit breaker according to claim 1 wherein said connecting member is a bushing (100), said pair of push shafts (25) includes a sleeve (251) and a shaft body (252), said sleeve (251) is fitted over an end of said shaft body (252) protruding outside said lever plate (21), said sleeve (251) is adapted to be in push-fit engagement with an outer edge of a cam of said cam assembly (4); the shaft bodies (252) of the pair of pushing shafts (25) are connected to both ends of the sleeve (100).

3. The operating mechanism of a circuit breaker according to claim 2 wherein both ends of the sleeve (100) are provided with threaded holes, and the shaft body (252) is in threaded connection with both ends of the sleeve (100).

4. An operating mechanism for a circuit breaker according to claim 2 wherein said bushing (251) is a rolling bushing.

5. The operating mechanism of a circuit breaker according to claim 2 wherein both ends of said bushing (100) abut against the inner side surfaces of a pair of lever plates (21).

6. The operating mechanism of a circuit breaker according to claim 2 wherein said bushing (100) extends into a corresponding hole in said lever piece (21) or both ends of said bushing extend through said pair of lever pieces (21), and said shaft body (252) is threadedly coupled to both ends of said bushing (100).

7. The operating mechanism of a circuit breaker according to claim 1 wherein said connecting member is a shaft (200), both ends of said shaft (200) are inserted through said pair of lever pieces (21), and said push shaft (25) is mounted on both ends of said shaft (200).

8. The operating mechanism of a circuit breaker according to claim 7 wherein the shaft (200) has external threads formed on both ends, the push shaft (25) has internal threads formed thereon, and the push shaft (25) is threadedly engaged with the ends of the shaft (200).