CN210778450U

CN210778450U - Closing lever structure of circuit breaker operating mechanism

Info

Publication number: CN210778450U
Application number: CN201921704214.1U
Authority: CN
Inventors: 卢嘉玉; 卢志刚
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: 2020-06-16
Anticipated expiration: 2029-09-30

Abstract

The utility model provides a pair of circuit breaker operating device's combined floodgate lever structure has effectively solved the unilateral atress of prior art fulcrum axle and has leaded to unbalanced problem because the both ends of hasp lever fulcrum axle support on a pair of curb plate, has increased the intensity of this fulcrum axle, has improved the life of fulcrum axle. In addition, because the lock catch lever fulcrum shaft is fixed on the lock catch lever, the pair of bearings are respectively arranged on the pair of side plates, and the lock catch lever fulcrum shaft rotate in the pair of bearings as a whole, the problem that no space is arranged between the lock catch lever and the fulcrum shaft in the prior art is effectively solved, the frictional resistance between the lock catch lever and the fulcrum shaft after fatigue can be effectively reduced, the reliability of rotation of the lock catch lever after multiple fatigue is increased, and the lock catch lever is of great importance for the closing circuit breaker.

Description

Closing 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

The circuit breaker, as a kind of power distribution equipment, plays a role in protecting electrical equipment in the power grid, that is, when a fault occurs in the power grid, for example, there is 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, the moving contact and the fixed contact of the circuit breaker are separated, so that the circuit is cut off.

As shown in fig. 1 and 2, a pair of side plates 1 is fixedly connected by a plurality of fixed shafts, a closing half shaft 2 and a cam shaft 5 rotate on the pair of side plates 1, a fixed shaft 101 is fixed on the single side plate 1, and a locking lever 3 rotates around the fixed shaft 101. In the energy storage state (see fig. 1), the shaft sleeve 501 of the camshaft 5 is in contact with the buckling surface 3b of the locking lever, and the closing half shaft 2 is in contact with the buckling surface 3a of the locking lever. The cam shaft 5 tends to rotate counterclockwise, the sleeve 501 generates a pressure F2 on the fastening surface 3b of the locking lever, the locking lever 3 tends to rotate clockwise, and the fastening surface 3a of the locking lever generates a pressure F1 on the brake half shaft 2. The spring 4 is mounted on the latch lever 3 at one end and on the side plate 1 at the other end, and tends to rotate the latch lever 3 counterclockwise about the fixed shaft 101.

When the above-described mechanism is subjected to a service including a life test, the following problems occur:

1. as the shaft 101 is fixed on the unilateral side plate, as shown in figure 2, the shaft 101 is easy to damage after fatigue caused by unbalanced stress; and

2. the rotating contact relationship between the locking lever 3 and the fixed shaft 101 is friction between steel, no space is added with a bearing, and abrasion among shaft holes is aggravated after fatigue, so that the rotating flexibility of the locking lever is influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the invention provides a closing lever structure of a circuit breaker operating mechanism.

In order to achieve the above object of the present invention, a closing lever structure of a circuit breaker operating mechanism includes:

a pair of side plates;

the locking lever is arranged between the pair of side plates and provided with a locking lever face and a locking lever cambered surface;

two lock lever fulcrum shafts which are respectively fixed on the lock lever and extend,

the two end parts of the lock catch lever fulcrum shaft are mutually connected at the side plates so that the lock catch lever fulcrum shaft rotates relative to the side plates to drive the lock catch lever to rotate together; and a switching-on half shaft for switching on, which is provided with a switching-on half shaft excircle surface and a switching-on half shaft notch,

the locking lever face is in separable contact with the outer circular face of the closing half shaft, and the locking lever arc face slides in the opening of the closing half shaft.

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

Furthermore, the fixing mode of the lock catch lever fulcrum shaft on the lock catch lever is welding

Further, the fixing mode of the lock catch lever fulcrum shaft on the lock catch lever is threaded fastening.

Further, a pair of the bearings is provided on the pair of side plates, and both end portions of the latch lever fulcrum shaft rotate in the pair of bearings.

Still further, the bearing is a needle bearing.

Still further, the bearing is an oil bearing.

Still further, the bearing is a shaft sleeve.

The utility model provides a pair of circuit breaker operating device's combined floodgate lever structure can effectively solve prior art's defect to realize the following technological effect:

1. because the two end parts of the lock catch lever fulcrum shaft 8 are supported on the pair of side plates 6, the problem of unbalance caused by single-side stress of the fulcrum shaft in the prior art is effectively solved, the strength of the fulcrum shaft is increased, and the service life of the fulcrum shaft is prolonged; and

2. because the latch lever fulcrum shaft 8 is fixed on the latch lever 7, the pair of bearings 10 are respectively arranged on the pair of side plates 6, and the latch lever 7 and the latch lever fulcrum shaft 8 rotate in the pair of bearings 10 as a whole, the problem that no space is provided for mounting the bearings between the latch lever and the fulcrum shaft in the prior art is effectively solved, the frictional resistance between the latch lever and the fulcrum shaft after fatigue can be effectively reduced, the reliability of rotation of the latch lever after multiple fatigue is increased, and the method is of great importance for the closing circuit breaker.

Drawings

FIG. 1 is a schematic view of a prior art operating mechanism in a charged state.

FIG. 2 is a schematic view of a prior art actuator latch mounting arrangement.

Fig. 3 is a schematic view of the energy storage state of the operating mechanism.

Fig. 4 the schematic view of the installation structure of the operating mechanism lock catch of the present invention

Description of reference numerals:

1: a side plate; 101: a fixed shaft; 2: a switching-on half shaft; 3: a latch lever; 3 a: the first buckling surface of the buckling lever; 3 b: a second buckling surface of the buckling lever; 4: a spring; 5: a camshaft; 501: a shaft sleeve; 6: a side plate; 7: a latch lever; 7 a: the locking lever surface; 7 b: a latch lever arc surface; 8: a latch lever fulcrum shaft; 9: a switching-on half shaft; 9 a: closing half shaft excircle surface; 9 b: closing a half shaft notch; 10: and a bearing.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

Referring to fig. 4, the closing lever structure of the circuit breaker operating mechanism provided by the invention comprises a pair of side plates 6, a locking lever 7 arranged between the pair of side plates 6, a locking lever fulcrum shaft 8, a closing half shaft 9 and a bearing 10.

As shown in fig. 4, the pair of side plates 6 are fixedly connected by a plurality of fixed shafts, the closing half shaft 9 rotates on the pair of side plates 6, the pair of bearings 10 are respectively installed on the pair of side plates 6, and both ends of the latch lever fulcrum shaft 8 rotate in the pair of bearings 10. The locking lever fulcrum shaft 8 is fixed on the locking lever 7 in a riveting mode, a welding mode, a thread fastening mode and the like. The latch lever 7 and the latch lever fulcrum shaft 8 rotate as a whole in a pair of bearings 10.

Referring to fig. 3 again, in the energy storage state of the mechanism, the locking lever 7 tends to rotate counterclockwise, the locking lever face 7a contacts with the outer circular surface 9a of the closing half shaft, and the locking lever face 7a generates a pressure F3 on the outer circular surface 9a of the closing half shaft. When the energy release tripping device releases energy, the closing half shaft 9 rotates anticlockwise, the locking lever face 7a is separated from the outer circular face 9a of the closing half shaft, the locking lever 7 rotates anticlockwise, and the locking lever arc face 7b slides into the closing half shaft notch 9 b.

Through the above description, the utility model provides a pair of circuit breaker operating device's combined floodgate lever structure can effectively solve prior art's defect to realize the following technological effect:

1. because the two end parts of the lock catch lever fulcrum shaft 8 are supported on the pair of side plates 6, the problem of unbalance caused by single-side stress of the fulcrum shaft in the prior art is effectively solved, the strength of the fulcrum shaft is increased, and the service life of the fulcrum shaft is prolonged;

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 utility model provides a circuit breaker operating device's closing lever structure which characterized in that, it includes:

a pair of side plates (6);

the locking device comprises a locking lever (7) arranged between a pair of side plates (6), wherein the locking lever (7) is provided with a locking lever surface (7a) and a locking lever cambered surface (7 b);

a locking lever fulcrum shaft (8) fixed on the locking lever (7) and extending at two sides respectively,

the two end parts of the lock catch lever fulcrum shaft (8) are mutually connected at the side plate (6) so that the lock catch lever fulcrum shaft (8) rotates relative to the side plate (6) to drive the lock catch lever (7) to rotate together; and

a switching-on half shaft (9) for switching on, which is provided with a switching-on half shaft excircle surface (9a) and a switching-on half shaft notch (9b),

wherein the locking lever face (7a) is detachably contacted with the outer circular face (9a) of the closing half shaft, and the locking lever arc face (7b) slides in the opening (9b) of the closing half shaft.

2. The closing lever structure of an operating mechanism of a circuit breaker according to claim 1, characterized in that the locking lever fulcrum shaft (8) is fixed to the locking lever (7) by riveting.

3. The closing lever structure of an operating mechanism of a circuit breaker according to claim 1, wherein the fixing manner of the latch lever fulcrum shaft (8) on the latch lever (7) is welding.

4. The closing lever structure of an operating mechanism of a circuit breaker according to claim 1, characterized in that the locking lever fulcrum shaft (8) is fixed on the locking lever (7) by screw fastening.

5. The closing lever structure of an operating mechanism of a circuit breaker according to claim 1, wherein a pair of bearings (10) are provided at the pair of side plates (6), and both end portions of the latch lever fulcrum shaft (8) rotate in the pair of bearings (10).

6. Closing lever structure of an operating mechanism of circuit breaker according to claim 5 characterized in that said bearing (10) is a needle bearing.

7. Closing lever structure of an operating mechanism of circuit breaker according to claim 5 characterized in that said bearing (10) is an oil bearing.

8. Closing lever structure of an operating mechanism of circuit breakers according to claim 5, characterised in that said bearing (10) is a bushing.