CN210607144U

CN210607144U - Operating mechanism of circuit breaker

Info

Publication number: CN210607144U
Application number: CN201922046714.7U
Authority: CN
Inventors: 缪佳春; 朱诚; 周敏琛
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: 2020-05-22
Anticipated expiration: 2029-11-25

Abstract

An operating mechanism of a circuit breaker belongs to the technical field of low-voltage electrical appliances. When the operating mechanism performs a switching-on action, the energy storage spring assembly releases energy and pushes the energy storage lever assembly to rotate, and then the energy storage lever assembly pushes the connecting rod assembly to act after rotating; the energy storage lever assembly comprises a swinging shaft and a pair of lever sheets, the swinging shaft is arranged on the pair of lever sheets, and the pair of lever sheets are provided with edges which are protruded towards the energy storage spring assembly relative to the swinging shaft; the energy storage spring assembly comprises an upper bracket, the upper bracket is supported on the swing shaft, and the energy storage spring assembly is characterized in that: the upper bracket is provided with a positioning recessed cavity for accommodating an edge of the lever piece, thereby restricting displacement of the upper bracket in the axial direction of the swing shaft. The energy storage spring assembly is ensured to be perpendicular to the swinging shaft in the spring stretching direction, the performance stability of the energy storage spring assembly is ensured, and the performance of the circuit breaker is further improved.

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 low-voltage universal circuit breaker is used for protecting loads in power supply and distribution, and can break a circuit to protect load equipment from being influenced when fault current occurs. More specifically, low voltage circuit breakers protect lines and load equipment in distribution lines by closing or separating a pair of separable contacts of a contact system to make or break the line. An operating mechanism is typically included within the circuit breaker for providing the circuit breaker actuation energy. The operating mechanism includes an energy storage spring assembly for storing energy and providing energy for actuation of the circuit breaker when released. Specifically, the energy storage spring assembly stores power input by a hand or a motor in the energy storage spring so as to provide enough power to enable the circuit breaker to complete a closing operation in a closing action. Therefore, the energy storage spring assembly is an important part of the operating mechanism, and the performance of the energy storage spring assembly directly determines the performance of the operating mechanism. All be equipped with the energy storage spring in current energy storage spring assembly, reach the purpose of energy storage through compression energy storage spring during the energy storage, and when operating device moved, the spring force that produces when releasing by the energy storage spring drives the circuit breaker and closes a floodgate the action as power. However, the energy storage spring can move left and right in the working process and is unstable, and a place which is not reasonable enough in design exists. If the energy storage spring is biased, the energy storage spring cannot reach the correct position or the spring force is unstable, the performance of the energy storage spring assembly can be influenced, and the performance of the whole circuit breaker is further influenced. Therefore, it is necessary to develop an energy storage spring assembly which can ensure that the energy storage spring is firmly installed in the expansion and contraction process. The applicant has therefore made an advantageous design, in the context of which the solution to be described below is made.

Disclosure of Invention

The utility model aims to provide an operating device of circuit breaker, it can restrict the displacement of upper bracket in the axial direction of oscillating axle, guarantees that energy storage spring assembly's the flexible direction of spring is perpendicular with the oscillating axle, guarantees energy storage spring assembly's stable performance, and then improves the performance of circuit breaker.

The utility model aims to provide an operating mechanism of a circuit breaker, which comprises a pair of side plates arranged at intervals, a connecting rod assembly positioned between the pair of side plates, an energy storage lever assembly and an energy storage spring assembly, wherein when the operating mechanism performs a switching-on action, the energy storage spring assembly releases energy and pushes the energy storage lever assembly to rotate, and then the connecting rod assembly is pushed to act after the energy storage lever assembly rotates; the energy storage lever assembly comprises a swinging shaft and a pair of lever sheets, the swinging shaft is arranged on the pair of lever sheets, and the pair of lever sheets are provided with edges which are protruded towards the energy storage spring assembly relative to the swinging shaft; the energy storage spring assembly comprises an upper support, the upper support is abutted against the swing shaft, and a positioning concave cavity used for containing the edge of the lever piece is arranged on the upper support, so that the displacement of the upper support in the axial direction of the swing shaft is limited.

The utility model discloses a specific embodiment, energy storage spring unit still include lower carriage, spring and chassis, spring one end support and lean on the upper bracket on, the other end supports and leans on the lower carriage on, upper bracket and lower carriage relative slip and both can not break away from, the lower carriage install on the chassis, the chassis fix between a pair of curb plate.

In another specific embodiment of the present invention, the upper bracket includes an upper cover and an extension bar, the extension bar extends from the upper cover, and the positioning cavity is located on the upper cover.

In another specific embodiment of the present invention, the upper cover is provided with a pair of abutting bosses adjacent to a side of the energy storage lever assembly, the pair of abutting bosses are provided with arc-shaped cavities for abutting against the swing shaft, the upper cover is further provided with a boss, the two sides of the positioning cavity are adjacent to the bosses, and the two outer sides of the two bosses are adjacent to the abutting bosses.

In another specific embodiment of the present invention, the upper cover is provided with a pair of abutting bosses, the pair of abutting bosses are provided with arc-shaped cavities, the arc-shaped cavities are used for abutting the swing shaft, the upper cover is further provided with a boss, the positioning cavities and the bosses are adjacently arranged between the pair of abutting bosses, one of the abutting bosses abuts against the positioning cavity, and the other abutting boss abuts against the boss.

In yet another specific embodiment of the present invention, the positioning cavity is an arc-shaped cavity.

In yet another specific embodiment of the present invention, the positioning cavity is a rectangular cavity.

In a more specific embodiment of the present invention, the boss is a triangular boss.

In yet another specific embodiment of the present invention, the boss is a rectangular boss.

The utility model discloses owing to adopted above-mentioned structure, the beneficial effect who has: the upper bracket is provided with a positioning concave cavity capable of containing the edge of the lever piece, so that the upper bracket is limited from displacing in the axial direction of the oscillating shaft, the spring stretching direction of the energy storage spring assembly is perpendicular to the oscillating shaft, the performance stability of the energy storage spring assembly is guaranteed, and the performance of the circuit breaker is improved.

Drawings

Fig. 1 is a schematic diagram of one side of a circuit breaker operating mechanism.

Figure 2 a schematic view of the other side of the circuit breaker operating mechanism.

Fig. 3 the utility model discloses an energy storage spring unit's decomposition schematic diagram among circuit breaker operating device.

Fig. 4 the utility model discloses energy storage spring unit's upper bracket schematic diagram among circuit breaker operating device.

Figure 5 the utility model discloses a lower carriage schematic diagram of energy storage spring assembly among the circuit breaker operating device.

Figure 6 the utility model discloses an energy storage spring assembly's chassis sketch map among circuit breaker operating device.

Fig. 7 is a schematic view of another upper bracket side in the circuit breaker operating mechanism of the present invention.

Fig. 8 is a schematic view of another upper bracket opposite side of the circuit breaker operating mechanism.

In the figure: 1. side plate, 11, stroke slot; 2. energy storage lever assembly, 21 oscillating shaft, 22 lever piece, 221 edge; 3. the energy storage spring assembly comprises an energy storage spring assembly, a bracket 31, a bracket 311, an upper bracket 3111, an upper cover 3112, an abutting boss 3113, an arc-shaped concave cavity 3114, a first convex edge 3115, an extension rod 3116, a thread head 3117, a positioning concave cavity 31171, a first side wall 31172, a second side wall 3118, a boss 312, a lower bracket 3121, a lower cover 3122, a clamping boss 3123, a second convex edge 3124, an extension seat 31241, a through hole 313, a nut 313, a spring 32, a chassis 33, a base 331, a bending edge 332, a clamping end 333, a clamping end 335, a clamping hole 336 and a mounting hole.

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.

Referring to fig. 1 and 2, the present invention relates to an operating mechanism of a circuit breaker, wherein the circuit breaker includes an operating mechanism and a contact system for implementing a switching function of the circuit breaker. The operating mechanism comprises a pair of side plates 1 which are arranged opposite to each other, the side plates 1 are arranged at intervals, and internal components of the operating mechanism are accommodated between the side plates 1, namely, the side plates 1 are positioned at two outer sides of the operating mechanism. The operating mechanism further comprises a main shaft, a connecting rod assembly, an energy storage lever assembly 2 and an energy storage spring assembly 3. When the operating mechanism performs a switching-on action, the energy storage spring assembly 3 releases energy and pushes the energy storage lever assembly 2 to rotate, then the energy storage lever assembly 2 pushes the connecting rod assembly to act after rotating, finally the connecting rod assembly drives the spindle to rotate, and then the spindle drives the moving contact system to perform a switching-on action.

As shown in fig. 1 and 2, the energy storage lever assembly 2 is rotatably disposed between a pair of side plates 1, and includes a swing shaft 21 and a pair of lever pieces 22. The swing shaft 21 is provided on a pair of lever pieces 22. Specifically, the swing shaft 21 passes through the pair of lever pieces 22, and both ends of the swing shaft 21 penetrate through the stroke grooves 11 on the pair of side plates 1. The pair of lever pieces 22 have edges 221 protruding toward the energy storage spring assembly 3 with respect to the swing shaft 21. The stroke grooves 11 are symmetrically arranged on the pair of side plates 1. The stroke groove 11 is a generally circular arc-shaped closed groove, the shape of the closed groove is matched with the motion track of the swing shaft 21, and when the swing shaft 21 swings along with the energy storage lever assembly 2, two ends of the swing shaft 21 just move in the stroke groove 11.

As shown in fig. 1 to 6, the core component of the technical solution of the present invention is an energy storage spring assembly 3, which is also located between the pair of side plates 1. The energy storage spring assembly 3 comprises a bracket 31, a spring 32 and a bottom frame 33. The spring 32 is disposed on the bracket 31. The bracket 31 has one end mounted on the base frame 33 and the other end mounted on the swing shaft 21. The bracket 31 includes an upper bracket 311 and a lower bracket 312 which are separable. One end of the spring 32 abuts against the upper bracket 311, and the other end abuts against the lower bracket 312. The spring 32, the upper support 311 and the lower support 312 may form a spring assembly, i.e. the three are assembled as a whole. Specifically, the spring 32 is disposed between the upper bracket 311 and the lower bracket 312, and the upper bracket 311 and the lower bracket 312 can slide relatively but cannot be separated from each other, so that the spring 32 is prevented from falling off, and the extension range of the spring 32 is also limited. In order to prevent the upper support 311 and the lower support 312 from being separated from each other, the above-mentioned operation can be performed by various methods, such as a method of screwing a nut onto a screw, or a snap-fit retaining ring, a blocking plate, etc., or a method of screwing a bolt, which is preferred in this embodiment.

As shown in fig. 2, 3, 4, 7, and 8, the upper holder 311 abuts on the swing shaft 21. The upper bracket 311 includes a cover 3111 and a protruding bar 3115, and the protruding bar 3115 is extended from the cover 3111. The protruding shaft 3115 is generally cylindrical, although other shapes are possible, such as triangular, square, etc. One side of upper cover 3111 that is close to energy storage lever subassembly 2 be equipped with a pair of boss 3112 that supports, support to be equipped with arc cavity 3113 on boss 3112, arc cavity 3113 be used for with swing axle 21 support to cooperate. A positioning concave cavity 3117 is also arranged on one side surface of the upper cover 3111 close to the energy storage lever assembly 2. The positioning cavity 3117 is fitted to the edge 221 of the lever plate 22. Specifically, the edge 221 of the lever plate 22 is located inside the positioning cavity 3117. The positioning concave cavity 3117 may be an arc-shaped concave cavity, a rectangular concave cavity, or the like. The positioning cavity 3117 includes two side walls, a first side wall 31171 and a second side wall 31172. These two side walls serve as stopper surfaces that cooperate with the edge 221 to restrict the displacement of the upper holder 311 in the axial direction of the swing shaft 21. When the side of the positioning cavity 3117 abuts against the abutment boss 3112, the second side wall 31172 can be abutted against the inner wall of the boss 3112.

To increase the contact area between the two sides of the rim 221 and the two sidewalls of the cavity 3117, a boss 3118 may be provided on one or both sides where the cavity 3117 is located. The boss 3118 may be a triangular boss, a rectangular boss, or the like. Any point on the boss 3118 is not higher than any point on the arc-shaped concave cavity 3113, so the boss 3118 is not contacted with the swing shaft 21 all the time in the working process, i.e. spaced, thereby preventing the influence on the relative rotation between the energy storage spring assembly 3 and the energy storage lever assembly 2. More specifically, the two sides of the positioning cavity 3117 are adjacent to the boss 3118. And the two outer sides of the two bosses 3118 are adjacent to the abutment boss 3112. As shown in fig. 7 and 8, the positioning concave 3117 and the boss 3118 are adjacently disposed between two abutting bosses 3112, wherein the abutting boss 3112 on one side is adjacent to the positioning concave 3117, and the abutting boss 3112 on the other side is adjacent to the boss 3118.

The protruding bar 3115 protrudes into the lower bracket 312 and protrudes from the lower bracket 312, and a threaded head 3116 is formed at the end of the protruding bar 3115 protruding from the lower bracket 312. When the protruding bar 3115 protrudes out of the lower bracket 312, it is screwed by a nut 313, thereby preventing the upper bracket 311 and the lower bracket 312 from being separated from each other. A first protruding edge 3114 is disposed on a side surface of the upper cover 3111 close to the spring 32, and the first protruding edge 3114 is located around the upper cover 3111. When the spring 32 is pressed against the cover 3111, the first rim 3114 is located at the periphery of the end of the spring 32, preventing the end of the spring 32 from being displaced and even being separated from the cover 3111.

As shown in fig. 5, the lower bracket 312 includes a lower cover 3121. A protruding seat 3124 extends from the lower cover 3121, that is, the lower cover 3121 and the protruding seat 3124 are integrally disposed. The end of the other end of the spring 32 abuts against the lower cover 3121. The protruding seat 3124 is matched with the protruding rod 3115, that is, the protruding rod 3115 is screwed with a nut after extending into and penetrating through the protruding seat 3124, so that the upper bracket 311, the lower bracket 312 and the spring 32 form a module, and the difficulty of installing the spring 32 is reduced. Specifically, a through hole 31241 is formed in the protruding seat 3124, and the through hole 31241 penetrates through the protruding seat 3124, so that the protruding bar 3115 penetrates through the protruding seat 3124. The protruding seat 3124 in this embodiment is cylindrical. Of course, other shapes are possible, such as triangular cylinders, square cylinders, and the like. The side of the lower cover 3121 close to the spring 32 is provided with a second protruding rim 3123, the second protruding rim 3123 is located around the lower cover 3121, when the spring 32 presses against the lower cover 3121, the second protruding rim 3123 is located on the periphery of the end of the spring 32, which prevents the end of the spring 32 from displacing, even separating from the lower cover 3121. One side of the lower cover 3121 close to the bottom frame 33 is provided with a clamping protrusion 3122, the clamping protrusion 3122 is clamped into the bottom frame 33, and the fixed installation between the two is realized.

As shown in fig. 2 and 6, the bottom frame 33 is used for mounting the lower bracket 312, and the bottom frame 33 is fixed between the pair of side plates 1. The bottom frame 33 in this embodiment is a sheet metal part. Other materials are of course possible, such as high strength composites, but the performance needs to meet the requirements of the chassis 33 itself. The bottom frame 33 comprises a substrate 331, a bending edge 332 and a clamping end 333. The clamping ends 333 are located at two sides of the base plate 331 and are respectively inserted into the pair of side plates 1, so as to fix the bottom frame 33 between the pair of side plates 1. The substrate 331 is provided with a fastening hole 335 and a mounting hole 336. The mounting hole 336 is used to clear the nut 313 and the threaded head 3116. And the clamping hole 335 is used for the insertion of the clamping protrusion 3122 on the lower bracket 312. Preferably, the clamping holes 335 are arranged in pairs. More preferably, there are two mounting holes 336, and two pairs of the fastening holes 335 are provided, and each pair of the two fastening holes 335 are respectively located at two outer sides of each mounting hole 336.

To sum up, the utility model discloses in, be equipped with location cavity 3117 on upper bracket 311, this location cavity 3117 is used for holding lever piece 22's edge 221 to limit upper bracket 311 at the ascending displacement of the axial direction of oscillating axle 21, guarantee that energy storage spring assembly's the flexible direction of spring is perpendicular with oscillating axle 21, guarantee energy storage spring assembly's stable performance, and then improve the performance of circuit breaker.

Claims

1. An operating mechanism of a circuit breaker comprises a pair of side plates (1) arranged at intervals, a connecting rod assembly positioned between the pair of side plates (1), an energy storage lever assembly (2) and an energy storage spring assembly (3), wherein when the operating mechanism performs a closing action, the energy storage spring assembly (3) releases energy and pushes the energy storage lever assembly (2) to rotate, and then the energy storage lever assembly (2) pushes the connecting rod assembly to act after rotating; the energy storage lever assembly (2) comprises a swinging shaft (21) and a pair of lever sheets (22), the swinging shaft (21) is arranged on the pair of lever sheets (22), and the pair of lever sheets (22) have edges (221) protruding towards the energy storage spring assembly (3) relative to the swinging shaft (21); the energy storage spring assembly (3) comprises an upper support (311), the upper support (311) is abutted against the swinging shaft (21), and the energy storage spring assembly is characterized in that: the upper bracket (311) is provided with a positioning concave cavity (3117) for accommodating an edge (221) of the lever piece (22) so as to restrict displacement of the upper bracket (311) in the axial direction of the swing shaft (21).

2. The operating mechanism of a circuit breaker according to claim 1, wherein said energy storage spring assembly (3) further comprises a lower bracket (312), a spring (32) and a bottom bracket (33), one end of said spring (32) abuts against said upper bracket (311) and the other end abuts against said lower bracket (312), said upper bracket (311) and said lower bracket (312) are relatively slidable and non-detachable, said lower bracket (312) is mounted on said bottom bracket (33), and said bottom bracket (33) is fixed between a pair of side plates (1).

3. The operating mechanism of a circuit breaker according to claim 1 wherein said upper frame (311) comprises a cover (3111) and a protruding bar (3115), said protruding bar (3115) extends from said cover (3111), and said positioning cavity (3117) is located on said cover (3111).

4. The operating mechanism of a circuit breaker according to claim 3, wherein a pair of abutting bosses (3112) are provided on a side surface of the upper cover (3111) close to the energy storage lever assembly (2), an arc-shaped recess (3113) is provided on the pair of abutting bosses (3112), the arc-shaped recess (3113) is adapted to abut against the swing shaft (21), a boss (3118) is further provided on the upper cover (3111), two sides of the positioning recess (3117) abut against the boss (3118), and two outer sides of the two bosses (3118) abut against the abutting bosses (3112).

5. The operating mechanism of a circuit breaker according to claim 3, wherein a pair of abutting bosses (3112) are provided on a side surface of the upper cover (3111) close to the energy storage lever assembly (2), an arc-shaped recess (3113) is provided on the pair of abutting bosses (3112), the arc-shaped recess (3113) is adapted to abut against the swing shaft (21), a boss (3118) is further provided on the upper cover (3111), the positioning recess (3117) and the boss (3118) are adjacently disposed between the pair of abutting bosses (3112), wherein the abutting boss (3112) on one side abuts against the positioning recess (3117), and the abutting boss (3112) on the other side abuts against the boss (3118).

6. An operating mechanism for a circuit breaker according to claim 1 wherein said positioning cavity (3117) is an arcuate cavity.

7. An operating mechanism for a circuit breaker according to claim 1 wherein said positioning cavity (3117) is a rectangular cavity.

8. The operating mechanism of a circuit breaker according to claim 4 or 5 wherein said boss (3118) is a triangular boss.

9. The operating mechanism of a circuit breaker according to claim 4 or 5 wherein said boss (3118) is a rectangular boss.