CN210778449U

CN210778449U - Connecting rod assembly of circuit breaker operating mechanism

Info

Publication number: CN210778449U
Application number: CN201921682690.8U
Authority: CN
Inventors: 卢嘉玉; 轩吉涛; 赵鹏
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 link assembly includes a pair of curb plate, a pivot subassembly, sets up link assembly and separating brake semi-axis between a pair of curb plate. The utility model provides a circuit breaker operating device's link assembly, owing to the fulcrum axle of the conversion lever with separating brake tripping system and energy storage system's camshaft is two independent conversion lever fulcrum axles and camshafts by original same radical axle split to it is low to have solved conversion lever span overlength rigidity, the problem of easy inefficacy during fatigue atress, and the swing range of conversion lever when also can reducing the dropout simultaneously is favorable to dwindling tripping system's occupation space.

Description

Connecting rod assembly of circuit breaker operating mechanism

Technical Field

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

Background

In an operating mechanism of an energy storage switch/breaker of a low-voltage electrical appliance, a transmission mechanism is an important component to realize closing and opening actions. 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, when 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, 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 the circuit is cut off.

Along with the improvement of performance indexes such as breaking, short endurance and mechanical life of the circuit breaker, higher requirements are placed on the improvement of the strength and rigidity of parts in a brake separating tripping system of an operating mechanism. Meanwhile, the existing operating mechanism generally has the following defects:

1. the switching lever span of the opening tripping system is too long, the rigidity is low, and the effect is not changed after fatigue stress. Because the conversion lever and the camshaft share one shaft in the prior art, the connecting rod is ensured not to interfere with the energy storage lever assembly and the camshaft during movement, so the structural design is designed to ensure that the conversion lever has overlong span and low rigidity, and the original structural space cannot be optimized.

2. The roller of the double-pole lever in the brake separating tripping system is matched with the conversion lever, so that the swing amplitude of the conversion lever is too large when tripping is performed, the occupied space is too large, the volumes of other parts are reduced, and the layout is not facilitated.

3. Because the design space is limited in the brake separating tripping system, the roller shaft of the double-pole lever in contact with the conversion lever is thin and easy to break.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a circuit breaker operating device's link assembly, its separating brake tripping system's conversion lever's fulcrum axle and energy storage system's camshaft are by fulcrum axle and the camshaft of original same root axle split into two independent conversion levers.

In order to realize the utility model discloses the purpose, the utility model provides a pair of circuit breaker operating device's link assembly, it includes a pair of curb plate, a pivot subassembly, sets up link assembly and separating brake semi-axis between a pair of curb plate, wherein:

the rotating shaft assembly comprises a rotating shaft and a cantilever fixed on the rotating shaft, and the rotating shaft assembly rotates on the pair of side plates;

the connecting rod assembly comprises a first connecting rod, a second shaft, a shaft sleeve, a conversion lever fulcrum shaft, a conversion connecting rod, a double-knife lever and a double-knife lever fulcrum shaft, wherein the second shaft is hinged with the first connecting rod and the second connecting rod, the shaft sleeve rotates on the second shaft, the conversion lever fulcrum shaft rotates between the pair of side plates, the conversion connecting rod, the double-knife lever and the double-knife lever fulcrum shaft rotate between.

Furthermore, one end of the first connecting rod is hinged to the cantilever of the rotating shaft assembly, the other end of the first connecting rod is hinged to one end of the second connecting rod through a second shaft, the shaft sleeve is in separable contact with the outer end face of the conversion lever, the other end of the second connecting rod is hinged to one end of the conversion lever, the other end of the conversion lever is hinged to one end of the conversion connecting rod, the conversion lever rotates around the fulcrum shaft of the conversion lever, and the other end of the conversion connecting rod is hinged to the double-knife lever.

Further, the other end face of the double-knife lever is in separable contact with the outer contour surface of the opening half shaft, the double-knife lever rotates around a fulcrum shaft of the double-knife lever, and after the opening half shaft rotates on the pair of side plates, an arc surface at one end of the double-knife lever can slide in a notch of the opening half shaft.

The rotating shaft assembly is rotatably connected with the first connecting rod, the cantilever of the rotating shaft assembly is hinged with the first connecting rod, one end of the opening spring is fixed on two sides of the first shaft, the other end of the opening spring is fixed on the pair of side plates, and the rotating shaft assembly can stretch and release the opening spring when rotating.

The double-knife lever is characterized by further comprising a first return spring and a second return spring, wherein the first return spring is arranged on the double-knife lever and can generate anticlockwise return force on the double-knife lever; and the second reset spring is arranged on the opening half shaft and can generate anticlockwise reset force on the opening half shaft.

Further, the first return spring and the second return spring are torsion springs.

And when the double-knife lever rotates around the double-knife lever fulcrum shaft, the double-knife lever can be in separable contact with the fixed shaft for fixing the pair of side plates.

Further, when the conversion lever rotates around the conversion lever fulcrum shaft, the conversion lever is in separable contact with the second fixed shaft fixing the pair of side plates.

The utility model provides a circuit breaker operating device's link assembly is two independent conversion lever fulcrum axles and camshafts owing to the fulcrum axle of the conversion lever with separating brake tripping system and energy storage system's camshaft by original same root axle split to reach following technological effect:

1. the problem of conversion lever span overlength rigidity low, volatile when tired atress is effective is solved. After two independent shafts are changed, the fulcrum shaft of the conversion lever can structurally avoid the moving space of the energy storage lever assembly and the cam shaft, so that the conversion lever can be designed to be shortened in span, the rigidity is increased, the problem of fatigue failure can be solved, and the service life of the part is prolonged.

2. The roller structure of the double-knife lever is eliminated, and the risk of failure of the roller shaft is greatly reduced.

3. The swing amplitude of the conversion lever during tripping is reduced, and the occupied space of the tripping system is favorably reduced.

Drawings

Fig. 1 the utility model provides a circuit breaker operating device closes a floodgate state schematic diagram.

Fig. 2 the utility model provides a breaker operating device separating brake intermediate process state schematic diagram.

Fig. 3 the utility model provides a state schematic diagram is accomplished in circuit breaker operating device separating brake.

Fig. 4 the utility model provides a circuit breaker operating device's pivot subassembly structure sketch map.

Fig. 5 the utility model provides a circuit breaker operating device link assembly schematic structure.

Fig. 6 the utility model provides a circuit breaker operating device separating brake semi-axis structure sketch map.

Description of reference numerals:

1: a side plate; 101: a first fixed shaft; 102: a second fixed shaft; 103: fixing a shaft III; 2: a rotating shaft assembly; 201: a rotating shaft; 202: a cantilever; 3: a connecting rod assembly; 31: a first link; 311: a first link plate; 312: a first shaft pin; 313: a first shaft; 32: a second link; 321: a second link plate; 322: a second shaft pin; 323: a second shaft; 324: a shaft sleeve; 33: a transfer lever; 331: converting the lever sheet; 331 a: converting the outer contour surface of the lever sheet; 332: converting a fulcrum shaft of the lever; 333: a third shaft; 34: a conversion connecting rod; 341: converting the connecting rod sheet; 342: shaft four; 343: a fifth shaft; 35: a double-knife lever; 351: a double-cutter lever sheet; 351 a: a double-cutter bar face; 351 b: a double-blade lever arc surface; 352: a double-knife lever fulcrum shaft; 353: a third shaft pin; 4: a brake-separating half shaft; 4 a: the outer contour surface of the opening half shaft; 4 b: opening a brake half shaft notch; 5: a brake separating spring; 6: a first return spring; 7: and a second return spring.

Detailed Description

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

Referring to fig. 1 to 3, the utility model provides a link assembly of circuit breaker operating device includes a pair of curb plate 1, a pivot subassembly 2, sets up link assembly 3, separating brake semi-axis 4, separating brake spring 5, reset spring 6 and two 7 of reset spring between a pair of curb plate 1.

The pair of side plates 1 are fixedly connected through a first fixed shaft 101, a second fixed shaft 102 and a third fixed shaft 103.

The spindle assembly 2 includes a spindle 201 and a cantilever 202 fixed to the spindle 201. The upper arm 202 has both ends rotatably fixed to the pair of side plates 1 so that the rotary shaft assembly 2 rotates on the pair of side plates 1. The link assembly 3 includes a first link 31, a second link 32, a first shaft 313 where the first link 31 and the suspension arm 202 are hinged, a second shaft 323 where the first link 31 and the second link 32 are hinged, a bushing 324 rotated on the second shaft 323, a switching lever 33, a switching lever fulcrum shaft 332 rotated between the pair of side plates 1, a switching link 34, a double blade lever 35, and a double blade lever fulcrum shaft 352 rotated between the pair of side plates 1.

In this embodiment, the first link 31 is fixed by two first link pieces 311 through a first shaft pin 312, one end of the two first link pieces 311 is hinged to the two cantilevers 202 through a first shaft pin 313, the second link 32 is fixed by two second link pieces 321 through a second shaft pin 322, the other end of the two first link pieces 311 is hinged to one end of the two second link pieces 321 through a second shaft pin 323, the shaft sleeve 324 rotates on the second shaft pin 323, the two second link pieces 321 are located on the inner sides of the two first link pieces 311, and the shaft sleeve 324 is located on the inner sides of the two second link pieces 321. The switching lever 33 includes a switching lever piece 331 and a switching lever fulcrum shaft 332, the switching lever fulcrum shaft 332 is fixed to the switching lever piece 331, and the switching lever fulcrum shaft 332 rotates on the pair of side plates 1. The other ends of the two second link pieces 321 are hinged to one end of the switching lever piece 331 through a third shaft 333, and the switching lever piece 331 is located inside the two second links 321. The other end of the conversion lever piece 331 is hinged to one end of the two conversion link pieces 341 through a fifth shaft 343. The double-knife lever 35 is fixed by two double-knife lever pieces 351 through a shaft pin three 353, the two double-knife lever pieces 351 rotate on a double-knife lever fulcrum shaft 352, and the double-knife lever fulcrum shaft 352 rotates on the pair of side plates 1. The other ends of the two conversion connecting rod pieces 341 are hinged with one ends of the two double-cutter lever pieces 351 through a fourth shaft 342. The surface 351a of the double-blade lever 35 can be in separable contact with the outer contour surface 4a of the opening half shaft 4, and the limit shaft 4c of the opening half shaft 4 can be in separable contact with the feature in the side plate 1. When the double-blade lever 35 rotates around the double-blade lever fulcrum shaft 352 and the opening half shaft 4 rotates on the pair of side plates 1, the arc surface 351b of the double-blade lever 35 can slide in the notch 4b of the opening half shaft 4.

Referring again to fig. 1, in the closing state of the operating mechanism, the surface 351a of the double-pole lever 35 contacts the outer contour surface 4a of the opening half shaft 4 (see fig. 5 and 6), and the sleeve 324 of the connecting rod assembly 3 contacts the outer contour surface 331a of the switching lever piece (see fig. 5). In the present invention, since the shaft sleeve 324 is rotatably disposed on the second shaft 323 hinged with the first connecting rod 31 and the second connecting rod 32, the impact force and the friction force generated by the contact between the shaft sleeve 324 and the outer contour surface 331a of the converting lever plate are very small.

One end of the opening spring 5 is connected to a first shaft 313 of the cantilever 202 hinged to the connecting rod assembly 31, and the other end of the opening spring 5 is connected to the side plate 1, so that the opening spring 5 tends to rotate clockwise relative to the rotating shaft assembly 2.

Referring to fig. 1, 2, 5 and 6 again, when the opening half shaft 4 rotates clockwise, the double-pole lever arc 351b of the connecting rod assembly 3 slides into the notch 4b of the opening half shaft 4, the sleeve 324 of the connecting rod assembly 3 slides along the outer contour surface 331a of the switching lever piece, the third shaft 333 rotates counterclockwise around the switching lever fulcrum 332, the switching lever piece 331 contacts the second fixed shaft 102, the rotating shaft assembly 2 rotates clockwise for a certain angle, and at this time, the connecting rod assembly 3 is folded into the state shown in fig. 2, namely, the intermediate process state of opening the operating mechanism.

Referring to fig. 2 and 3 again, the rotating shaft assembly 2 rotates clockwise under the action of the reset force of the opening spring 5, the rotating shaft assembly 2 stops rotating after the rotating shaft assembly 202 contacts with the third fixed shaft 103, the shaft sleeve 324 of the connecting rod assembly 3 is separated from the outer contour surface 331a of the switching lever piece, the first reset spring 6 is mounted on the double-blade lever 35, the double-blade lever 35 rotates counterclockwise under the action of the reset force of the first reset spring 6, the switching lever piece 331 is separated from the second fixed shaft 102, and the double-blade lever piece 351 stops rotating after contacting with the first fixed shaft 101. The second reset spring 7 is arranged on the opening half shaft 4, the opening half shaft 4 rotates anticlockwise under the action of the anticlockwise reset force of the second reset spring 7, the limiting shaft 4c of the opening half shaft 4 stops rotating after being contacted with the features in the side plate 1, at the moment, the connecting rod assembly 3 is in a folded state shown in the figure 3, and the opening of the operating mechanism is completed.

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. A connecting rod assembly of a circuit breaker operating mechanism is characterized by comprising a pair of side plates (1), a rotating shaft assembly (2), a connecting rod assembly (3) arranged between the side plates (1) and a brake-separating half shaft (4), wherein:

the rotating shaft assembly (2) comprises a rotating shaft (201) and a cantilever (202) fixed on the rotating shaft (201), and the rotating shaft assembly rotates on the pair of side plates (1);

the connecting rod assembly (3) comprises a first connecting rod (31), a second connecting rod (32), a second shaft (323) hinged with the first connecting rod (31) and the second connecting rod (32), a shaft sleeve (324) rotating on the second shaft (323), a conversion lever (33), a conversion lever fulcrum shaft (332) rotating between the pair of side plates (1), a conversion connecting rod (34), a double-blade lever (35) and a double-blade lever fulcrum shaft (352) rotating between the pair of side plates (1).

2. The linkage assembly for a circuit breaker operating mechanism of claim 1,

one end of the first connecting rod (31) is hinged with the cantilever (202) of the rotating shaft assembly (2), the other end of the first connecting rod (31) is hinged with one end of the second connecting rod (32) through a second shaft (323), the shaft sleeve (324) is in separable contact with an outer end face (331a) of the conversion lever (33), the other end of the second connecting rod (32) is hinged with one end of the conversion lever (33), the other end of the conversion lever (33) is hinged with one end of the conversion connecting rod (34), the conversion lever (33) rotates around the conversion lever fulcrum shaft (332), and the other end of the conversion connecting rod (34) is hinged with the double-blade lever (35).

3. The connecting-rod assembly of the circuit breaker operating mechanism according to claim 1, characterized in that the other end face (351a) of the double-pole lever (35) is detachably contacted with the outer contour face (4a) of the opening half-shaft (4), the double-pole lever (35) rotates around the double-pole lever fulcrum shaft (352), and one end arc face (351b) of the double-pole lever (35) can slide in the notch (4b) of the opening half-shaft (4) after the opening half-shaft (4) rotates on the pair of side plates (1).

4. The link assembly of a circuit breaker operating mechanism according to claim 1, further comprising a switching-off spring (5), wherein one end of the switching-off spring (5) is fixed on both sides of a first shaft (313) of the rotating shaft assembly (2), which is hinged to the first link (31), and the other end is fixed on the pair of side plates (1), and the rotating shaft assembly (2) can stretch and release the switching-off spring (5) by rotating.

5. The link assembly of claim 1, further comprising a first return spring (6) and a second return spring (7), wherein the first return spring (6) is mounted on the double-pole lever (35) and generates a counterclockwise return force on the double-pole lever (35); and the second reset spring (7) is arranged on the opening half shaft (4) and can generate anticlockwise reset force on the opening half shaft (4).

6. The link assembly of an operating mechanism for a circuit breaker according to claim 5, wherein said first return spring (6) and said second return spring (7) are torsion springs.

7. The link assembly of a circuit breaker operating mechanism according to claim 3 wherein said double pole lever (35) is in separable contact with a first fixed shaft (101) that fixes said pair of side plates (1) when rotated about said double pole lever fulcrum shaft (352).

8. The link assembly of a circuit breaker operating mechanism according to claim 1 wherein said transfer lever (33) is in separable contact with a second fixed shaft (102) that fixes said pair of side plates (1) when rotated about said transfer lever fulcrum shaft (332).