CN210489570U

CN210489570U - Circuit breaker mechanism

Info

Publication number: CN210489570U
Application number: CN201922046487.8U
Authority: CN
Inventors: 朱诚; 周敏琛; 陈斌
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2019-11-25
Filing date: 2019-11-25
Publication date: 2020-05-08
Anticipated expiration: 2029-11-25

Abstract

A circuit breaker mechanism comprises a pair of side plates arranged at intervals, and a connecting rod assembly, an energy storage lever assembly and a spring assembly which are arranged between the side plates; when the breaker is switched on, the energy is released by the spring assembly to drive the energy storage lever assembly to act, and the energy storage lever assembly drives the connecting rod assembly to act after acting; spring unit one end sets up between the board of both sides, and the other end supports and leans on the swing axle, its characterized in that: the swing shaft is sleeved with a positioning shaft sleeve, the parts of the swing shaft, which are positioned at two sides of the positioning shaft sleeve, are optical axes, the spring assemblies are in a pair, and the positioning shaft sleeves are positioned between two opposite side surfaces of the pair of spring assemblies. The advantages are that: the stress concentration of the oscillating shaft is reduced, and the service life of the oscillating shaft is prolonged.

Description

Circuit breaker mechanism

Technical Field

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

Background

At present, a circuit breaker commonly available on the market comprises an operating mechanism for providing circuit breaker action energy and a contact system for realizing the closing/opening function of the circuit breaker, and the structure of the operating mechanism and part of components thereof is shown in fig. 1 to 3. The operating mechanism further comprises a connecting rod assembly, a cam assembly, an energy storage lever assembly 2 and a spring assembly 3, and specifically, the operating mechanism comprises a pair of side plates 1, and the pair of side plates 1 are arranged at intervals. Be equipped with link assembly, cam module, energy storage lever assembly 2 and spring assembly 3 between a pair of curb plate 1, energy storage lever assembly 2 motion is promoted when spring assembly 3 release energy, energy storage lever assembly 2 promotes link assembly motion again, link assembly drives the circuit breaker and closes and divides the action. The energy storage lever assembly 2 comprises a pair of lever pieces 21, and the pair of lever pieces 21 are arranged at intervals through a plurality of fixed shafts 24. The rotating centers of the pair of lever pieces 21 are provided with rotating shaft sleeves 23, and the rotating shaft sleeves 23 are used for being matched with a rotating shaft. A swing shaft 22 is arranged at one swing end of the pair of lever pieces 21, a pushing shaft 25 is arranged at the other swing end of the pair of lever pieces, the swing shaft 22 is abutted and matched with the spring assembly 3, and the pushing shaft 25 is matched with the cam assembly of the operating mechanism. The pair of side plates 1 are provided with stroke grooves 12 which are matched with two end parts of the swinging shaft 22, and the shape and the length of the stroke grooves 12 are matched with the swinging angle of the swinging shaft 22. A side plate reinforcement 11 is attached to the pair of side plates 1 at the end of the stroke groove 12. The side plate reinforcing member 11 is arranged to increase the thickness of the collision part of the swing shaft 22 and the stroke slot 12, which is equivalent to increase the thickness of the side plate 1, thereby effectively preventing the deformation of the side plate 1 at the collision part of the swing shaft 22 and the stroke slot 12. Because the side plate 1 is provided with the side plate reinforcing piece 11, the side plate 1 and the swinging shaft 22 are not deformed when the side plate 1 collides with the swinging shaft 22, and the swinging shaft 22 is easy to deform when the side plate 1 collides with the swinging shaft 22. Meanwhile, in order to prevent the spring assembly 3 from shifting when abutting against the swing shaft 22, the swing shaft 22 is generally machined with a step or a boss for retaining the spring assembly 3. In actual operation, the swinging shaft 22 is deformed and bent, and stress concentration is often generated, so that the swinging shaft cannot adapt to the operation requirement, and the service life of the operating mechanism is affected. It is therefore necessary to develop a stored energy lever assembly that reduces stress concentrations during bending of the pivot shaft 22, and to this end, the applicant has made an advantageous design, and the solution described below is made in this context.

Disclosure of Invention

The utility model aims to provide a circuit breaker mechanism, which adopts a positioning shaft sleeve to replace a positioning boss on the original oscillating shaft on the oscillating shaft, so that the oscillating shaft is closer to an optical axis, the stress concentration of the oscillating shaft is reduced, and the service life of the oscillating shaft is prolonged; meanwhile, mutual friction between the spring assemblies can be effectively prevented.

The utility model discloses a task is accomplished like this, a circuit breaker mechanism, including a pair of curb plates that set up at interval and link assembly, energy storage lever subassembly, spring assembly that are located between a pair of curb plates; when the breaker is switched on, the spring assembly releases energy to drive the energy storage lever assembly to act, and the energy storage lever assembly drives the connecting rod assembly to act after acting; one end of the spring assembly is arranged between the two side plates, the other end of the spring assembly is abutted against the swinging shaft, a positioning shaft sleeve is sleeved on the swinging shaft, the parts, located on the two sides of the positioning shaft sleeve, on the swinging shaft are optical axes, the spring assemblies are in a pair, and the positioning shaft sleeves are located between the two opposite side faces of the pair of spring assemblies.

In another specific embodiment of the present invention, the positioning sleeve is rotatably disposed on the swing shaft.

In another specific embodiment of the present invention, the positioning sleeve is fixed to the swing shaft.

In another specific embodiment of the present invention, the spring assembly includes an upper bracket, a spring and a lower bracket, wherein one end of the spring is abutted against the upper bracket, and the other end of the spring is abutted against the lower bracket, the upper bracket has a pair of abutting bosses, the pair of abutting bosses are used for abutting against the cylindrical surface of the oscillating axle, the abutting boss is further provided with a semi-circular cavity, the semi-circular cavity is just attached to the cylindrical surface of the oscillating axle, the pair of spring assemblies are mutually close to abut against the bosses to abut against the two end surfaces of the positioning axle sleeve respectively.

In another specific embodiment of the present invention, the positioning sleeve is in the shape of a ring.

The utility model discloses a still have a concrete embodiment, the rocking shaft on seted up first hole, correspondingly be in the location sheathe in seted up the second hole, first hole be the screw hole, the second hole be the unthreaded hole, circuit breaker mechanism include the screw, the screw visit behind the second hole screw-in the first hole.

In yet another specific embodiment of the present invention, an end of the screw remote from the first hole is embedded in the second hole.

In a more specific embodiment of the present invention, the positioning groove is formed on the swing shaft, the positioning groove is an annular groove surrounding the cylindrical surface of the swing shaft, the positioning shaft is provided with a second hole, the second hole is a threaded hole, the circuit breaker mechanism includes a screw, and the screw is screwed into the second hole and then extends into the positioning groove.

In yet another specific embodiment of the present invention, an end of the screw, which is far away from the positioning groove, is buried in the second hole.

By adopting the structure, the positioning shaft sleeve is adopted outside the oscillating shaft, so that the oscillating shaft body is approximately in the shape of an optical axis, stress concentration is not easy to generate when the oscillating shaft is stressed, the service life of the oscillating shaft is prolonged, and the service life of the circuit breaker mechanism is ensured; simultaneously, be provided with two sets of spring unit who arranges side by side in the operating device of circuit breaker, the location axle sleeve has been established to the cover on the oscillating axle, the location axle sleeve be located a pair of spring unit on between the relative both sides face for two sets of spring unit can not take place mutual drunkenness, can effectively prevent the mutual friction between the spring unit, improved the stability of spring unit in work.

Drawings

Fig. 1 is a schematic structural diagram of an operating mechanism in a circuit breaker according to the prior art.

Fig. 2 is a schematic diagram of the energy storage lever assembly and the side plate of the operating mechanism of the circuit breaker in the prior art.

Fig. 3 is a perspective view of a stored energy lever assembly of an operating mechanism in a circuit breaker according to the prior art.

Fig. 4 is a schematic structural diagram of an operating mechanism in the circuit breaker of the present invention.

Fig. 5 is a perspective view of an energy storage lever assembly of an operating mechanism in a circuit breaker.

Fig. 6 is a schematic diagram of the energy storage lever assembly and the spring assembly of the operating mechanism in the circuit breaker.

Fig. 7 is a schematic structural diagram of an embodiment of an energy storage lever assembly of an operating mechanism in a circuit breaker.

Fig. 8 is a schematic structural diagram of another embodiment of an energy storage lever assembly of an operating mechanism in a circuit breaker according to the present invention.

In the figure: 1. side plate, 11, side plate reinforcement, 12, stroke slot; 2. the energy storage lever assembly comprises an energy storage lever assembly, 21 lever pieces, 22 oscillating shafts, 221 first holes, 222 positioning grooves, 23 rotating shaft sleeves, 24 fixing shafts, 25 pushing shafts, 28 positioning shaft sleeves, 281 second holes and 29 screws; 3. the spring component, 31, the upper bracket, 311, the abutting boss, 3111, the semicircular concave cavity, 32, the spring, 33, the lower bracket; 4. a chassis.

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.

As shown in fig. 4 to 8, the present invention relates to a circuit breaker mechanism, wherein the operating mechanism includes a pair of side plates 1 disposed at intervals, and the side plates are used for accommodating internal components of the operating mechanism therebetween, i.e. the pair of side plates 1 are located at two outer sides of the operating mechanism. Specifically, the operating mechanism is provided with a connecting rod assembly, an energy storage lever assembly 2 and a spring assembly 3 between a pair of side plates 1. The spring assembly 3 is used for storing energy, and when the breaker is switched on, the spring assembly 3 releases energy to provide motion power for the breaker. The energy storage lever component 2 is used for receiving the pushing of the spring component 3 and driving the connecting rod component to act after self action.

As shown in fig. 4 to 8, the energy storage lever assembly 2 is a lever component, which includes a pair of lever plates 21 spaced apart from each other. The pair of lever pieces 21 are identical in shape and size. A plurality of fixing shafts 24 are fixed between the pair of lever pieces 21, and preferably, three fixing shafts 24 are used in this embodiment to ensure a reliable interval between the pair of lever pieces 21. The rotating shaft sleeve 23 is arranged at the rotating center of the pair of lever pieces 21, namely, the rotating shaft sleeve 23 is fixed on the pair of lever pieces 21. The rotating shaft sleeve 23 is used for being sleeved on a rotating shaft arranged between the pair of side plates 1, so that the energy storage lever assembly 2 is rotatably arranged between the pair of side plates 1. A swing shaft 22 is mounted on one swing end of the pair of lever pieces 21, and the swing shaft 22 is cylindrical. Both ends of the swing shaft 22 penetrate the pair of lever pieces 21 and are fixed to the lever pieces 21. Since both ends of the swing shaft 22 pass through the stroke grooves 12 provided in the both side plates 1, the stroke grooves 12 are provided in a pair and are provided in the both side plates 1. The stroke groove 12 is a closed groove, the shape of the closed groove is matched with the motion track of the swinging shaft 22, and when the swinging shaft 22 swings along with the energy storage lever assembly 2, two ends of the swinging shaft 22 just move in the stroke groove 12. The other ends of the pair of lever pieces 21 are provided with pushing shafts 25. The pushing shafts 25 are a pair and are respectively arranged at the outer sides of the other swinging ends of the two lever pieces 21. The two pushing shafts 25 are symmetrically arranged.

As shown in fig. 4, a side plate reinforcement 11 is attached to the pair of side plates 1 at a position of one closed end of the stroke groove 12. The side plate reinforcing member 11 may be in various forms such as a sheet shape or a block shape, and in this embodiment, the side plate reinforcing member 11 is preferably a sheet-shaped plate material, which is attached to the side plate 1 to reinforce the thickness of the collision portion between the swing shaft 22 and the stroke slot 12 on the side plate 1, so as to improve the strength of the side plate 1 and effectively prevent the deformation of the side plate 1 at the collision portion between the swing shaft 22 and the stroke slot 12.

As shown in fig. 4 and 6, the spring assembly 3 is an energy component of the operating mechanism, which is used for providing energy for the operation of the operating mechanism. The spring assembly 3 is typically in the form of a spring to store energy. One end of the spring component 3 is clamped between the two side plates 1, and the other end of the spring component is propped against the swinging shaft 22. The spring assembly 3 comprises an upper bracket 31, a spring 32 and a lower bracket 33, wherein one end of the spring 32 abuts against the upper bracket 31, and the other end abuts against the lower bracket 33. The extension and contraction of the spring 32 brings the upper bracket 31 and the lower bracket 33 away from or close to each other. Specifically, the lower bracket 33 is clamped on the bottom frame 4 between the two side plates 1, and the upper bracket 31 is in abutting press fit with the swing shaft 22 on the energy storage lever assembly 2. When the spring 32 is released to expand, the upper bracket 31 pushes the swing shaft 22 to swing, so that the energy storage lever assembly 2 rotates.

As shown in fig. 4 to 8, the core features of the technical solution of the present invention are: the swing shaft 22 is provided with a positioning shaft sleeve 28, and the positioning shaft sleeve 28 is sleeved on the swing shaft 22 and is positioned between the two side plates 1. The positioning shaft sleeve 28 is sleeved on a designated position of the swing shaft 22, specifically, the positioning shaft sleeve 28 is fixed on the swing shaft 22 or can rotate around the swing shaft 22 at a position of the swing shaft 22, that is, the positioning shaft sleeve 28 cannot move axially along the swing shaft 22. The structure and relationship of the swing shaft 22 and the positioning boss 28 will be further described with reference to the following embodiments.

Example 1

As shown in fig. 7, in the present embodiment, the positioning sleeve 28 is fixed on the swing shaft 22, that is, the positioning sleeve 28 does not perform a rotational movement or an axial movement on the swing shaft 22. The positioning shaft sleeve 28 is in a circular ring shape. The swing shaft 22 is provided with a first hole 221, and the positioning sleeve 28 is correspondingly provided with a second hole 281, wherein the first hole 221 is a threaded hole, and the second hole 281 is a light hole. The circuit breaker mechanism comprises a screw 29, the positioning sleeve 28 is fixed on the swing shaft 22 through the screw 29, specifically, the screw 29 is screwed into the first hole 221 after penetrating through the second hole 281, and one end of the screw 29 far away from the first hole 221 is buried in the second hole 281. At this time, the positioning boss 28 is fixed to the swing shaft 22 and is immovable with respect to the swing shaft 22. Since the retainer bushing 28 has a certain thickness, it forms a flange on the cylindrical surface of the swing shaft 22.

As shown in fig. 6, the upper bracket 31 has a pair of abutment bosses 311 thereon, and the pair of abutment bosses 311 are used for abutting against the cylindrical surface of the swing shaft 22. A semicircular concave cavity 3111 is also arranged on the abutting boss 311, and the semicircular concave cavity 3111 is just attached to the cylindrical surface of the swing shaft 22. Operating device in be provided with two sets of spring unit 3 who arranges side by side, two that are close to each other on two sets of spring unit 3 lean on the boss 311 to be close to the both ends face of location axle sleeve 28 respectively, promptly location axle sleeve 28 be located a pair of spring unit 3 on the relative boss 311 of leaning on between, a pair of clearance of leaning on between the boss 311 has reduced to make the unable shake that produces close to each other of upper bracket 31 of two sets of spring unit 3, improved the stability of spring unit 3 in operation. Meanwhile, the positioning shaft sleeve 28 is adopted outside the swinging shaft 22, so that the swinging shaft 22 body is approximately in the shape of an optical axis, stress concentration is not easy to generate when the swinging shaft 22 is stressed, and the service life of the swinging shaft 22 is prolonged.

Example 2

As shown in fig. 8, the present embodiment is different from embodiment 1 in that: the positioning boss 28 rotates about the swing shaft 22 at a position of the swing shaft 22. The positioning shaft sleeve 28 is in a circular ring shape. The swing shaft 22 is provided with a positioning groove 222, and the positioning groove 222 is an annular groove surrounding the cylindrical surface of the swing shaft 22. The positioning sleeve 28 is provided with a second hole 281, and the second hole 281 is a threaded hole. The circuit breaker mechanism comprises a screw 29, the positioning sleeve 28 is rotatably mounted on the swing shaft 22 through the screw 29, specifically, the screw 29 is screwed into the second hole 281 and extends into the positioning slot 222, and one end of the screw 29 far away from the positioning slot 222 is buried in the second hole 281, so that the positioning sleeve 28 can rotate around the swing shaft 22, but the positioning sleeve 28 cannot move axially along the swing shaft 22. The matching relationship and advantages of the upper bracket 31 and the positioning sleeve 28 are the same as those of embodiment 1, and are not repeated here, and the mutual play of the pair of spring assemblies 3 can also be limited.

In conclusion, oscillating axle 22 on only set up a locating shaft cover 28, compare the oscillating axle 22 that sets up step, boss etc. among the prior art, oscillating axle 22 avoided stress concentration, improved oscillating axle 22's life-span.

Claims

1. A circuit breaker mechanism comprises a pair of side plates (1) arranged at intervals, and a connecting rod assembly, an energy storage lever assembly (2) and a spring assembly (3) which are arranged between the side plates (1); when the breaker is switched on, the spring assembly (3) releases energy to drive the energy storage lever assembly (2) to act, and the energy storage lever assembly (2) drives the connecting rod assembly to act after acting, wherein the energy storage lever assembly (2) comprises a pair of lever pieces (21), and a swinging shaft (22) is arranged at one swinging end of the pair of lever pieces (21); spring unit (3) one end set up between both sides board (1), the other end supports and leans on swing axle (22), its characterized in that: the swing shaft (22) is sleeved with a positioning shaft sleeve (28), the parts, located on two sides of the positioning shaft sleeve (28), of the swing shaft (22) are optical axes, the spring assemblies (3) are in a pair, and the positioning shaft sleeve (28) is located between two opposite side faces of the pair of spring assemblies (3).

2. A circuit breaker mechanism as claimed in claim 1 wherein said locating boss (28) is pivotally mounted on said swing shaft (22).

3. A circuit breaker mechanism as claimed in claim 1 wherein said locating boss (28) is fixed to said swing shaft (22).

4. The circuit breaker mechanism according to claim 1, wherein the spring assembly (3) comprises an upper bracket (31), a spring (32) and a lower bracket (33), one end of the spring (32) abuts against the upper bracket (31), the other end of the spring (32) abuts against the lower bracket (33), the upper bracket (31) is provided with a pair of abutting bosses (311), the pair of abutting bosses (311) are used for abutting against the cylindrical surface of the swing shaft (22), the abutting bosses (311) are further provided with a semicircular concave cavity (3111), the semicircular concave cavity (3111) is just attached to the cylindrical surface of the swing shaft (22), and the abutting bosses (311) on the pair of spring assemblies (3) which are close to each other abut against two end surfaces of the positioning sleeve (28) respectively.

5. A disconnector mechanism according to claim 1, 2, 3 or 4, characterized in that the locating bushing (28) is ring-shaped.

6. The circuit breaker mechanism as claimed in claim 3, wherein said swing shaft (22) has a first hole (221) and a corresponding second hole (281) in said positioning boss (28), said first hole (221) is a threaded hole, said second hole (281) is a unthreaded hole, said circuit breaker mechanism comprises a screw (29), and said screw (29) is inserted into said first hole (221) after penetrating through said second hole (281).

7. A circuit breaker mechanism according to claim 6 wherein the end of the screw (29) remote from the first aperture (221) is recessed within the second aperture (281).

8. The circuit breaker mechanism as claimed in claim 2, wherein the swing shaft (22) is provided with a positioning groove (222), the positioning groove (222) is an annular groove surrounding a cylindrical surface of the swing shaft (22), the positioning sleeve (28) is provided with a second hole (281), the second hole (281) is a threaded hole, the circuit breaker mechanism comprises a screw (29), and the screw (29) is screwed into the second hole (281) and extends into the positioning groove (222).

9. A circuit breaker mechanism according to claim 8 wherein the end of the screw (29) remote from the detent (222) is recessed within the second aperture (281).