CN210575785U

CN210575785U - Lever structure of circuit breaker operating mechanism

Info

Publication number: CN210575785U
Application number: CN201921682633.XU
Authority: CN
Inventors: 卢嘉玉; 轩吉涛; 崔华
Original assignee: Shanghai Liangxin Electrical Co Ltd
Current assignee: Shanghai Liangxin Electrical Co Ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-05-19
Anticipated expiration: 2029-09-30

Abstract

The utility model provides a pair of circuit breaker operating device's lever structure includes a pair of curb plate and sets up the dropout lever subassembly between a pair of curb plate, the dropout lever subassembly further includes the dropout lever and fixes the dropout lever fulcrum axle on the dropout lever, the both ends of fulcrum axle respectively with a pair of curb plate rotates to be connected. The utility model provides a pair of circuit breaker operating device's lever structure has effectively solved prior art's defect, can improve the life of dropout lever subassembly, can reduce the burden of the manual energy storage of mechanism and electronic energy storage.

Description

Lever structure of circuit breaker operating mechanism

Technical Field

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

Background

In the field of electrical and electrician technology, circuit breakers are used as a kind of power distribution equipment to protect electrical equipment in a power grid, i.e. when a fault occurs in the power grid, such as a short-circuit current or a fault current, the circuit breaker breaks the current to protect the electrical equipment and personnel in the power grid. In order to realize the protection function, an operating mechanism is arranged in the circuit breaker, and the moving contact and the static contact of the circuit breaker can be separated by controlling the movement of parts in the operating mechanism, so that a circuit is cut off, and a lever structure in the operating mechanism is very important.

Referring to fig. 1 and 2, a pair of side plates 1 are fixedly connected by a plurality of fixed shafts, and a rotating shaft assembly 6 and a cam assembly 4 rotate on the pair of side plates 1. A rotating shaft cantilever 601 of the rotating shaft assembly 6 is hinged to the upper connecting rod assembly 2 through a first shaft 201, the upper connecting rod assembly 2 is hinged to the lower connecting rod assembly 3 through a second shaft 301, and the lower connecting rod assembly 3 is hinged to the tripping lever assembly 5 through a third shaft 302. A pair of side plate bearings 101 are attached to the pair of side plates 1, respectively, and a cam fulcrum shaft 401 of the cam module 4 rotates in the pair of side plate bearings 101. The trip lever bearing 501 is fixed on the trip lever 502 to form the trip lever assembly 5, and the trip lever assembly 5 relatively rotates on the cam fulcrum shaft 401 through the trip lever bearing 501.

Since the trip lever assembly 5 and the cam assembly 4 share the fulcrum shaft 401, when the mechanism is subjected to a life test, the following problems occur:

1. the trip lever 502 and the trip lever fulcrum shaft (i.e., the cam fulcrum shaft 401) rotate relatively, and the trip lever assembly 5 and the fulcrum shaft thereof bear static pressure and rotational friction force. The thickness of the tripping lever bearing 501 of the tripping lever 502 is thinner due to the space of the fulcrum hole, and under the working condition of bearing static pressure and rotating friction force, the lever bearing 501 is easy to fail after being fatigued 2. the stress condition of the cam fulcrum shaft 401 is complex, and the shaft is easy to fail after being fatigued due to the static pressure and the friction force;

3. when mechanism combined floodgate energy storage, the counter-force transmits upper connecting rod subassembly 2 through pivot cantilever 601, transmits lower connecting rod subassembly 3 again, transmits tripping lever subassembly 5 again, transmits on cam fulcrum axle 401 again, leads to the static pressure increase that cam subassembly 4 received when the energy storage rotates, so the combined floodgate energy storage of mechanism compares mechanism separating brake energy storage moment bigger, has increased the burden of the manual energy storage and the electronic energy storage of mechanism.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a circuit breaker operating device's lever structure to make circuit breaker's operating device's life and operational reliability promote by a wide margin.

In order to realize the above-mentioned utility model's purpose, the utility model provides a pair of circuit breaker operating device's lever structure includes a pair of curb plate and sets up the dropout lever subassembly between a pair of curb plate, the dropout lever subassembly further includes the dropout lever and fixes the dropout lever fulcrum axle on the dropout lever, the both ends of fulcrum axle respectively with a pair of curb plate rotates to be connected.

The trip mechanism comprises a pair of side plates, a pair of trip lever assemblies, a pair of cam fulcrum shafts, a pair of side plates, a pair of cam fulcrum shafts, a pair of lower connecting rod assemblies, a pair of cam fulcrum shafts and a pair of cam fulcrum shafts, wherein the cam fulcrum shafts of the cam assemblies and the pair of cam fulcrum shafts rotate on the pair of side plates, the pair of side plates are hinged to each other through a sixth shaft, the pair of upper connecting rod assemblies and the pair of cam fulcrum shafts are hinged to each other through a fifth shaft, the pair of lower connecting rod assemblies and one end of the pair of trip lever assemblies are hinged to each.

Further, a pair of side plate bearings is arranged on the pair of side plates, and two ends of the tripping lever fulcrum shaft rotate in the pair of side plate bearings respectively.

Further, the fixing mode of fixing the tripping lever fulcrum shaft on the tripping lever is riveting.

Further, the fixing mode of fixing the tripping lever fulcrum shaft on the tripping lever is welding.

Further, the fixing mode of fixing the tripping lever fulcrum shaft on the tripping lever is bolt fastening.

Still further, the bearings on the pair of side plates adopt oil-retaining bearings.

Still further, the bearings on the pair of side plates are needle roller bearings.

Still further, the bearings on the pair of side plates are ball bearings.

Still further, the bearings on the pair of side plates adopt shaft sleeves.

The utility model provides a pair of circuit breaker operating device's lever structure has effectively solved prior art's defect, and has reached following technological effect:

1. the matching relation of the tripping lever and the tripping lever fulcrum shaft is changed from relative rotation in the prior art into relative fixation of the utility model, the tripping lever component rotates in the side plate bearing together, the original tripping lever bearing which is easy to lose efficacy is cancelled, and the service life of the tripping lever component can be prolonged;

2. the tripping lever fulcrum shaft and the cam fulcrum shaft are two relatively independent shafts. The tripping lever fulcrum shaft only bears static pressure but not rotation friction force, and the cam fulcrum shaft only bears rotation friction force but not static pressure. The original shaft is disassembled into two independent shafts, so that the service lives of the two shafts can be prolonged.

3. The tripping lever fulcrum shaft and the cam fulcrum shaft are two relatively independent shafts. The closing energy storage and the opening energy storage torque of the mechanism are the same, and compared with the prior art, the manual energy storage and electric energy storage burden of the mechanism can be reduced.

Drawings

Fig. 1 is a schematic view of a lever structure of a circuit breaker operating mechanism of the prior art.

Figure 2 is another schematic diagram of a lever structure of a prior art circuit breaker operating mechanism.

Fig. 3 the utility model discloses a lever structure schematic diagram of circuit breaker operating device.

Fig. 4 is another schematic diagram of a lever structure of a circuit breaker operating mechanism of the present invention.

Description of reference numerals:

1: a side plate; 101: a side plate bearing; 2: an upper link assembly; 201: a first shaft; 3: a lower link assembly; 301: a second shaft; 302: a third shaft; 4: a cam assembly; 401: a cam fulcrum shaft; 5: tripping the lever assembly; 501: tripping the lever bearing; 502: a trip lever; 6: a rotating shaft assembly; 601: a rotating shaft cantilever; 7: a side plate; 8: tripping the lever assembly; 801: tripping a fulcrum shaft of the lever; 802: a trip lever; 803: shaft four; 9: a cam assembly; 901: a cam fulcrum shaft; 10: a lower link assembly; 1001: a fifth shaft; 11: an upper link assembly; 1101: shaft six; 12: a rotating shaft assembly; 1201: a rotating shaft cantilever; 13: and a side plate bearing.

Detailed Description

The lever structure of the circuit breaker operating mechanism of the present invention will be described in detail with reference to the accompanying drawings.

Referring to fig. 3, the lever structure of the circuit breaker operating mechanism of the present invention includes a pair of side plates 7 and a trip lever assembly 8 disposed between the pair of side plates 7.

In the operating mechanism of a general circuit breaker, the mechanism related to the lever structure of the circuit breaker operating mechanism of the present invention has an upper connecting rod assembly 11, a lower connecting rod assembly 10, a cam assembly 9, and a rotating shaft assembly 12.

As shown in fig. 3 and 4, the pair of side plates 7 are fixedly connected by a plurality of fixing shafts, and the cam fulcrum shaft 901 and the rotating shaft assembly 12 of the cam assembly 9 rotate on the pair of side plates 7. The rotating shaft cantilever 1201 fixed on the rotating shaft assembly 12 is hinged with the upper connecting rod assembly 11 through a shaft six 1101, the upper connecting rod assembly 11 is hinged with the lower connecting rod assembly 10 through a shaft five 1001, and the lower connecting rod assembly 10 is hinged with one end of the tripping lever assembly 8 through a shaft four 803.

The pair of side plate bearings 13 are respectively installed on the pair of side plates 7, the trip lever fulcrum shaft 801 is fixed on the trip lever 802 to form the trip lever assembly 8, and the trip lever assembly 8 rotates in the pair of side plate bearings 13 through the trip lever fulcrum shaft 801.

In this embodiment, the fixing manner of the trip lever fulcrum shaft 801 to the trip lever 802 includes: riveting, welding, bolt fastening and the like. The bearing 13 mounted on the side plate may be a needle bearing, a ball bearing, an oil bearing, a sleeve, or the like.

Through the above description, it can be seen by those skilled in the art that the present invention provides a lever structure of a circuit breaker operating mechanism, which achieves the following technical effects:

1. the matching relation of the tripping lever 802 and the tripping lever fulcrum shaft 801 is changed from the relative rotation of the prior art into the relative fixation of the utility model, the tripping lever assembly 8 rotates in the side plate bearing 13 together, the original tripping lever bearing 501 which is easy to lose efficacy is cancelled, and the service life of the tripping lever assembly 8 can be prolonged;

2. trip lever fulcrum shaft 801 and cam fulcrum shaft 901 are relatively independent shafts. The trip lever fulcrum shaft 801 bears only static pressure and does not bear rotational friction, and the cam fulcrum shaft 901 bears only rotational friction and does not bear static pressure. 1 original axle is disassembled into 2 independent axles, can improve the life of 2 axles.

3. Trip lever fulcrum shaft 801 and cam fulcrum shaft 901 are relatively independent shafts. The closing energy storage and the opening energy storage torque of the mechanism are the same, and compared with the prior art, the manual energy storage and electric energy storage burden of the mechanism can be reduced.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art will understand that modifications and equivalent substitutions can be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all of them shall fall within the scope of the claims of the present invention.

Claims

1. The lever structure of the circuit breaker operating mechanism is characterized by comprising a pair of side plates (7) and a tripping lever assembly (8) arranged between the side plates (7), wherein the tripping lever assembly (8) further comprises a tripping lever (802) and a tripping lever fulcrum shaft (801) fixed on the tripping lever (802), and two end parts of the fulcrum shaft (801) are respectively in rotating connection with the side plates (7).

2. The lever structure of an operating mechanism of a circuit breaker according to claim 1, further comprising an upper link assembly (11), a lower link assembly (10), a cam assembly (9), and a rotating shaft assembly (12), wherein the cam fulcrum shaft (901) and the rotating shaft assembly (12) of the cam assembly (9) rotate on a pair of side plates (7), the rotating shaft assembly (12) is hinged to the upper link assembly (11) through a shaft six (1101), the upper link assembly (11) and the lower link assembly (10) are hinged through a shaft five (1001), one ends of the lower link assembly (10) and the trip lever assembly (8) are hinged through a shaft four (803), and the trip lever fulcrum shaft (801) and the cam fulcrum shaft (901) are two shafts which are relatively independent.

3. The lever structure of an operating mechanism of a circuit breaker according to claim 1, wherein a pair of side plate bearings (13) are provided on the pair of side plates (7), and both ends of the trip lever fulcrum shaft (801) rotate in the pair of side plate bearings (13), respectively.

4. The lever structure of an operating mechanism of a circuit breaker according to claim 1, wherein the trip lever fulcrum shaft (801) is fixed to the trip lever (802) by riveting.

5. The lever structure of an operating mechanism of a circuit breaker according to claim 1, wherein the trip lever fulcrum shaft (801) is fixed to the trip lever (802) by welding.

6. The lever structure of an operating mechanism of a circuit breaker according to claim 1, wherein the trip lever fulcrum shaft (801) is fixed to the trip lever (802) by means of bolt fastening.

7. A lever structure of an operating mechanism of a circuit breaker according to claim 3 wherein the bearings (13) of said pair of side plates (7) are oil-impregnated bearings.

8. A lever structure of an operating mechanism of a circuit breaker according to claim 3 wherein the bearings (13) of said pair of side plates (7) are needle bearings.

9. A lever structure of an operating mechanism of a circuit breaker according to claim 3 wherein the bearings (13) of the pair of side plates (7) are ball bearings.

10. A lever structure of an operating mechanism of a circuit breaker according to claim 3 wherein the bearings (13) of the pair of side plates (7) are bushing-type.