CN219998138U - Operating mechanism of universal circuit breaker - Google Patents

Abstract

The operating mechanism of the universal circuit breaker comprises a pair of side plates, an energy storage lever arranged between the pair of side plates, a cam assembly and a spring assembly, wherein when the cam assembly unlocks the energy storage lever during closing action, the spring assembly pushes the energy storage lever to rotate so as to drive a connecting rod assembly of the operating mechanism to act; the energy storage lever includes a pair of lever piece that the interval set up, and characteristics are: the through shaft assembly is arranged at one rotating end of the pair of lever plates and used for being matched with the cam assembly, the through shaft assembly comprises a through shaft, a shaft seat, a bearing and a clamp spring, two ends of the shaft seat are arranged in rotating holes in the pair of lever plates, the through shaft penetrates through the shaft seat, the bearing is sleeved at two ends of the through shaft and is arranged in the shaft seat, and the clamp spring is clamped on the through shaft and used for preventing the through shaft from falling off. The advantages are that: the two ends of the through shaft are matched with the cam assembly, so that the strength of the energy storage lever is improved, deformation and torsion are not easy to occur, and meanwhile, the bearing with lubricating oil storage function is arranged, so that the damage degree of the through shaft is further reduced.

Description

Operating mechanism of universal circuit breaker

Technical Field

The utility model belongs to the technical field of piezoelectric devices, and particularly relates to an operating mechanism of a universal circuit breaker.

Background

The universal circuit breaker is widely used in low-voltage power supply and distribution systems due to its excellent protection characteristics. The circuit breaker comprises an operating mechanism for executing the switching operation of the circuit breaker, wherein the operating mechanism is a core component of the circuit breaker. The energy storage system is an important component of the operating mechanism, the cam rotates during energy storage, and the cam drives the energy storage lever to compress the energy storage spring so as to realize energy storage.

Fig. 1 is a schematic diagram of an energy storage lever of an operating mechanism in a conventional circuit breaker. The energy storage lever 1 comprises a pair of lever plates 11, a protruding shaft 100 is arranged at one end part of each lever plate 11 outwards, a shaft sleeve 200 is additionally arranged on the protruding shaft 100, the protruding shaft 100 is used for being matched with a cam of an operating mechanism, and when the operating mechanism stores energy, the cam pushes the pair of protruding shafts 100, so that the energy storage lever 1 is driven to rotate.

As the performance index of the circuit breaker is continuously improved, the pressure value of the energy storage spring is also continuously improved due to the improvement of the contact pressure, and the original protruding shaft 100 is easy to deflect and even break under heavy load, so that the circuit breaker mechanism has faults such as difficult energy storage or incapacity of energy storage.

In view of the above-described prior art, there is a need for a rational improvement in the energy storage lever structure of existing operating mechanisms. To this end, the inventors have advantageously devised that the technical solutions described below are created in this context.

Disclosure of Invention

The utility model aims to provide an operating mechanism of a universal circuit breaker, wherein two ends of a through shaft are adopted on an energy storage lever to be matched with a cam assembly, so that the strength of the energy storage lever is improved, deformation and torsion are not easy to occur, and meanwhile, a bearing with lubricating oil storage function is arranged, so that the damage degree of the through shaft is further reduced.

The utility model aims to achieve the purpose that the operating mechanism of the universal circuit breaker comprises a pair of side plates, an energy storage lever arranged between the pair of side plates, a cam assembly and a spring assembly, wherein when the cam assembly performs a closing action, the energy storage lever is unlocked, and the spring assembly pushes the energy storage lever to rotate so as to drive a connecting rod assembly of the operating mechanism to act; the energy storage lever comprises a pair of lever sheets arranged at intervals, a through shaft assembly matched with the cam assembly is arranged at one rotating end of the pair of lever sheets, the through shaft assembly comprises a through shaft, shaft seats, bearings and clamp springs, two ends of the shaft seats are arranged in rotating holes in the pair of lever sheets, the through shaft penetrates through the shaft seats, the bearings are sleeved at two ends of the through shaft and are arranged in the shaft seats, and the clamp springs are clamped on the through shaft and are used for preventing the through shaft from falling off.

In a specific embodiment of the utility model, a shaft sleeve is additionally arranged on the shaft head of the through shaft which is in contact fit with the cam sheet of the cam assembly.

In another specific embodiment of the present utility model, the through shaft is provided with a pair of clamping grooves, the pair of clamping grooves are respectively located at the outer sides of the pair of shaft sleeves, and the clamping springs are clamped on the clamping grooves.

In another specific embodiment of the present utility model, the energy storage lever further includes a rotating shaft sleeve, and the rotating shaft sleeve is installed between the pair of lever pieces and corresponds to the position of the rotation center of the energy storage lever.

In yet another specific embodiment of the present utility model, the energy storage lever further includes a pressing shaft mounted on the other rotating end of the pair of lever pieces, the pressing shaft being adapted to press-fit with the spring assembly.

In a further specific embodiment of the present utility model, the shaft seat is a hollow circular cavity, and the openings at two ends of the circular cavity are provided with enlarged circular grooves for accommodating the bearings.

In a further specific embodiment of the present utility model, lubricating oil is added to the circular groove at the gap between the circular groove and the placed bearing, so as to ensure the flexibility of bearing rotation.

In a further specific embodiment of the present utility model, the clamping groove is located at the outer sides of two ends of the shaft seat.

In yet another embodiment of the present utility model, the lever plate is in the shape of a boomerang.

In yet a further specific embodiment of the utility model, the bearing is a needle bearing.

Due to the adoption of the structure, compared with the prior art, the utility model has the beneficial effects that: firstly, a through shaft assembly is arranged at one rotating end of a pair of lever sheets, and two ends of a through shaft of the through shaft assembly are respectively matched with cams of the cam assembly; and secondly, by additionally arranging a bearing with lubricating oil storage, the damage degree of the through shaft is further reduced, the maintenance cost is reduced, and the service life is prolonged.

Drawings

Fig. 1 is a schematic diagram of an energy storage lever of an operating mechanism in a conventional circuit breaker.

Fig. 2 is a schematic view of a part of the structure of the operating mechanism of the circuit breaker according to the present utility model.

Fig. 3 is a schematic structural view of the energy storage lever according to the present utility model.

Fig. 4 is a perspective exploded view of a first embodiment of a through shaft assembly in an energy storage lever according to the present utility model.

Fig. 5 is a plan cross-sectional view of a first embodiment of a through shaft assembly in an energy storage lever according to the present utility model.

Fig. 6 is a plan cross-sectional view of a second embodiment of a through shaft assembly in an energy storage lever according to the present utility model.

In the figure: 1. energy storage lever, 11, lever sheet, 12, through shaft assembly, 121, through shaft, 1211, shaft head, 1212, clamping groove, 122, shaft seat, 1221, circular groove, 123, bearing, 124, snap spring, 125, shaft sleeve, 13, rotary shaft sleeve, 14, fixed shaft, 15, pressing shaft; 2. a side plate; 3. cam assembly, 31. Cam plate; 4. a spring assembly; 100. a protruding shaft; 200. a shaft sleeve.

Detailed Description

The following detailed description of specific embodiments of the utility model, while given in connection with the accompanying drawings, is not intended to limit the scope of the utility model, and any changes that may be made in the form of the inventive concepts described herein, without departing from the spirit and scope of the utility model.

In the following description, all concepts related to the directions (or azimuths) of up, down, left, right, front and rear are directed to the position states where the drawings are being described, so as to facilitate public understanding, and thus should not be construed as being particularly limiting to the technical solutions provided by the present utility model.

The utility model relates to a universal circuit breaker which comprises an operating mechanism, a contact system and an arc extinguishing chamber. The operating mechanism is a driving part of the circuit breaker, and drives the contact system to conduct combined operation, so that the circuit breaker can be connected or disconnected. When the contact system of the operating mechanism performs the switching-off action, the arc generated on the contact system enters the arc extinguishing chamber and extinguishes in the arc extinguishing chamber, so that the current is cut off.

Fig. 2 is a schematic view of a part of the structure of the operating mechanism of the circuit breaker according to the present utility model. The operating mechanism comprises a pair of side plates 2, an energy storage lever 1 rotatably arranged between the pair of side plates 2, a cam assembly 3 rotatably arranged between the pair of side plates 2, and a spring assembly 4 arranged between the pair of side plates 2. The energy storage lever 1, the cam assembly 3 and the spring assembly 4 form an energy assembly of the operating mechanism. The spring assembly 4 is used for storing energy, and drives the operating mechanism to perform closing action when the spring assembly is released; the cam assembly 3 is used for controlling the action of the spring assembly 4, and specifically, the cam assembly 3 controls the action of the spring assembly 4 through the energy storage lever 1.

When the breaker needs energy storage, the cam component 3 rotates to drive the energy storage lever 1 to rotate, and the energy storage lever 1 rotates to push the spring component 4 to compress and store energy. When the breaker needs to perform a closing action, the cam assembly 3 unlocks the energy storage lever 1, at this time, the spring assembly 4 can release energy, which pushes the energy storage lever 1 to rotate, and the energy storage lever 1 drives the connecting rod assembly of the operating mechanism to act, and after the connecting rod assembly acts, the main shaft of the operating mechanism drives the contact system to perform the closing action.

As shown in fig. 3, the energy storage lever 1 includes a pair of lever plates 11 disposed at intervals, a through shaft assembly 12, a rotating shaft sleeve 13, and a fixed shaft 14 are disposed at one rotating end of the pair of lever plates 11, and a pressing shaft 15 is disposed at the other rotating end of the pair of lever plates 11.

The lever 11 is usually formed by processing a metal plate and has a boomerang shape. The shape of the pair of lever pieces 11 is uniform.

The through shaft assembly 12 is located on a rotating end of the pair of lever plates 11, and the through shaft assembly 12 is matched with the cam assembly 3. When the operating mechanism stores energy, the cam component 3 pushes the through shaft component 12 to drive the energy storage lever 1 to rotate, so as to compress the spring component 4. When the operating mechanism is switched on, the cam component 3 is not abutted against the through shaft component 12 any more, and the energy storage lever 1 can rotate under the drive of the spring component 4.

The two ends of the shaft seat 122 are mounted in the rotating holes on the pair of lever plates 11, and correspond to the rotating center of the energy storage lever 1, and after a shaft passes through the rotating shaft sleeve 13, the energy storage lever 1 can be rotatably arranged between the pair of side plates 2.

The number of the fixing shafts 14 is plural, and the fixing shafts are installed between the pair of lever pieces 11, so that reliable interval arrangement between the pair of lever pieces 11 is ensured. Preferably, the number of the fixing shafts 14 is three, so that the interval arrangement between the pair of lever plates 11 can be better ensured.

The pressing shaft 15 is mounted on the other rotating ends of the pair of lever plates 11, and the pressing shaft 15 is used for pressing and matching with the spring assembly 14 to ensure the synchronous movement relationship between the energy storage lever 1 and the spring assembly 4.

Fig. 4 and 5 are schematic diagrams of a first embodiment of the through shaft assembly 12 in the energy storage lever 1. The through shaft assembly 12 comprises a through shaft 121, a shaft seat 122, a bearing 123 and a clamping spring 124.

The through shaft 121 is a circular shaft, the through shaft 121 penetrates through the shaft seat 122, specifically, two shaft heads 1211 along the length direction of the through shaft 121 penetrate through the pair of lever plates 11, and a clamping slot 1212 for clamping the clamping spring 124 is formed in the through shaft 121. The clamping groove 1212 is located at the outer side of the two ends of the shaft seat 122.

The shaft seat 122 is fixedly installed on the pair of lever plates 11 and is used for accommodating the through shaft 121, a hollow circular cavity is formed in the shaft seat 122, enlarged circular grooves 1221 are formed in the openings at two ends of the circular cavity, and the circular grooves 1221 are used for accommodating the bearings 123.

The bearing 123 is in a ring shape and is sleeved on the through shaft 121, and the bearing 123 is installed inside the shaft seat 122. Thereby, the through shaft 121 can rotate, so that the force of the through shaft 121 is released, and the abrasion and deformation of the through shaft 121 are reduced. The bearing 123 is preferably a needle bearing.

The snap spring 124 is clamped in a clamping groove 1212 on the through shaft 121, so as to limit that the through shaft 121 cannot move left and right in the shaft seat 122, and can also block the bearing 123 to prevent the through shaft from falling out of the shaft seat 122.

Preferably, the circular groove 1221 is filled with lubricating oil at a gap with the bearing 123 to ensure flexibility of rotation of the bearing 123.

Fig. 6 is a schematic diagram of a second embodiment of the through shaft assembly 12 in the energy storage lever 1. It differs from the first embodiment in that: in this embodiment, the shaft sleeves 125 are additionally provided on the shaft heads 1211 where the through shaft 121 is in contact with and matched with the cam plate 31 of the cam assembly 3, and in this embodiment, the pair of clamping grooves 1212 on the through shaft 121 are respectively located at the outer sides of the pair of shaft sleeves 125, and when the clamping springs 124 are clamped on the clamping grooves 1212, the shaft sleeves 125 can be ensured not to fall off. The mounting of the sleeve 125 may also define the bearing 123 and the through shaft 121.

The shaft sleeve 125 is added, so that the sizes of the shaft head 1211 of the through shaft 121 and the cam plate 31 can be adjusted according to design requirements. Specifically, the outer diameter of the shaft head 1211 is limited by the bearing 123 when the through shaft 121 is installed, and the outer diameter of the two ends of the through shaft 121 can be increased by adding the shaft sleeve 125, so that the design requirement can be met without adjusting the shape of the cam plate 31.

Claims (10)

1. The operating mechanism of the universal circuit breaker comprises a pair of side plates (2), an energy storage lever (1) arranged between the pair of side plates (2), a cam assembly (3) and a spring assembly (4), wherein when the cam assembly (3) unlocks the energy storage lever (1) during closing action, the spring assembly (4) pushes the energy storage lever (1) to rotate so as to drive a connecting rod assembly of the operating mechanism to act; the energy storage lever (1) comprises a pair of lever plates (11) which are arranged at intervals, and is characterized in that: a pair of lever piece (11) a rotatory end on be equipped with one be used for with cam module (3) complex logical axle subassembly (12), logical axle subassembly (12) include logical axle (121), axle bed (122), bearing (123) and jump ring (124), the both ends of axle bed (122) install to a pair of lever piece (11) on the pivoted hole in, logical axle (121) link up axle bed (122), bearing (123) cover be in the both ends of logical axle (121) and install axle bed (122) in, jump ring (124) joint be in logical axle (121) on for prevent that logical axle (121) from droing.

2. The operating mechanism of a universal circuit breaker as recited in claim 1 wherein: a shaft sleeve (125) is additionally arranged on a shaft head (1211) which is in contact fit with the cam piece (31) of the cam assembly (3) through the shaft (121).

3. The operating mechanism of a universal circuit breaker as recited in claim 2 wherein: the through shaft (121) is provided with a pair of clamping grooves (1212), the clamping grooves (1212) are respectively positioned at the outer sides of the pair of shaft sleeves (125), and the clamping springs (124) are clamped on the clamping grooves (1212).

4. The operating mechanism of a universal circuit breaker as recited in claim 1 wherein: the energy storage lever (1) further comprises a rotating shaft sleeve (13), and the rotating shaft sleeve (13) is arranged between the pair of lever sheets (11) and corresponds to the position of the rotating center of the energy storage lever (1).

5. The operating mechanism of a universal circuit breaker as recited in claim 1 wherein: the energy storage lever (1) further comprises a pressing shaft (15), the pressing shaft (15) is arranged on the other rotating end of the pair of lever sheets (11), and the pressing shaft (15) is used for being in pressing fit with the spring assembly (4).

6. The operating mechanism of a universal circuit breaker as recited in claim 1 wherein: the inside of the shaft seat (122) is a hollow round cavity, enlarged round grooves (1221) are formed in the mouths of the two ends of the round cavity, and the round grooves (1221) are used for accommodating the bearings (123).

7. The operating mechanism of a universal circuit breaker as recited in claim 6 wherein: lubricating oil is added into the round groove (1221) at the gap between the round groove and the placed bearing (123) so as to ensure the rotation flexibility of the bearing (123).

8. An operating mechanism for a universal circuit breaker as claimed in claim 3 wherein: the clamping groove (1212) is positioned at the outer sides of the two ends of the shaft seat (122).

9. The operating mechanism of a universal circuit breaker as recited in claim 1 wherein: the lever piece (11) is in a boomerang shape.

10. The operating mechanism of a universal circuit breaker as recited in claim 1 wherein: the bearing (123) is a needle bearing.