CN218849361U

CN218849361U - Bidirectional stress spring assembly and three-station vacuum circuit breaker

Info

Publication number: CN218849361U
Application number: CN202223132331.XU
Authority: CN
Inventors: 邱志人; 黄帅
Original assignee: Fuzhou Xuji Electric Co ltd; Fuzhou Tianyu Electric Co Ltd
Current assignee: Fuzhou Xuji Electric Co ltd; Fuzhou Tianyu Electric Co Ltd
Priority date: 2022-11-24
Filing date: 2022-11-24
Publication date: 2023-04-11
Anticipated expiration: 2032-11-24

Abstract

The utility model relates to a vacuum circuit breaker field especially relates to two-way atress spring assembly and three station vacuum circuit breaker. The bidirectional stress spring assembly comprises a mandrel, a mandrel outer sleeve, a spring and a spacer sleeve, wherein the mandrel outer sleeve is sleeved outside the mandrel, the spring and the spacer sleeve are sleeved outside the mandrel outer sleeve, the spacer sleeve and the mandrel are tightly abutted under the compression of the spring, then a pin shaft penetrates through a mandrel through hole, an outer sleeve through hole and a spacer sleeve through hole simultaneously, two ends of the mandrel through hole are not in contact with the pin shaft, a first end of the spacer sleeve through hole is in contact with the pin shaft, and a second end of the outer sleeve through hole is in contact with the pin shaft. When the moving contact moves to the extreme position, the position of the pin shaft is kept still, however, the core shaft can continue to move, so that the pin shaft is subjected to resultant force towards one side, and the problems that in the prior art, after the moving contact moves in place, the moving contact cannot be just attached to a static contact or a grounding contact, so that gaps are easily formed, and the use performance of the vacuum circuit breaker is influenced are solved.

Description

Bidirectional stress spring assembly and three-station vacuum circuit breaker

Technical Field

The utility model relates to a vacuum circuit breaker field especially relates to two-way atress spring assembly and three station vacuum circuit breaker.

Background

At present, most switches in an electric power system use a vacuum circuit breaker to realize switching-on and switching-off operations, if grounding is needed, an additional grounding switch needs to be arranged, so that the switchgear is large in size and prone to misoperation, and therefore the three-station vacuum circuit breaker is produced in due course, the three-station vacuum circuit breaker is provided with a main circuit switching-on static contact and a grounding static contact, and a moving contact can reciprocate between the two static contacts to be electrically connected with one of the static contacts selectively.

For example, the invention patent application with the application publication number of CN102157297a discloses a three-position vacuum switch tube, which includes a movable moving contact, a static contact and a grounding contact respectively on the moving path of the moving contact, wherein the moving contact in the switch tube can selectively contact with the static contact to realize the connection of a circuit, or can selectively contact with the grounding contact to realize the grounding of the circuit, or can be located at a middle position to realize the isolation of the circuit.

The switch tube is required to be installed on a shell of the circuit breaker in the using process, the shell is provided with the lever in a rotating mode, the moving contact is connected to one end of the lever through the insulating pull rod, the operating mechanism is connected to the other end of the lever through the connecting rod, when the moving contact needs to be moved, the operating mechanism controls the connecting rod to move at first and then drives the lever to rotate, the other end of the lever drives the insulating pull rod to move, and then the moving contact is driven by the insulating pull rod to move.

However, when the three-station vacuum circuit breaker is used, no matter the three-station vacuum circuit breaker is in a closing state or a grounding state, in order to realize stable and reliable electrical connection of a circuit, two contacts of the circuit are required to be kept in pressure contact, an output shaft of an operating mechanism is connected with a movable contact through a connecting rod, a lever and an insulating pull rod, the operating mechanism stops moving after moving to a corresponding position, and the movable contact is in a closing, grounding or opening position at the moment, and whether the movable contact and a fixed contact are in good contact or not or whether the movable contact and a grounding outlet are in good contact or not depends on whether the locking position of the movable contact is accurate or not. Therefore, the precision requirement on the three-station vacuum circuit breaker is extremely high, the moving contact is required to be just tightly attached to a static contact or a grounding contact after the movement is completed, the moving contact is difficult to guarantee in the actual movement process, and once a gap appears between the contacts, the performance of the vacuum circuit breaker is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a two-way atress spring assembly for solve among the prior art moving contact motion back that targets in place, can't just paste tight static contact or ground contact and lead to appearing the clearance easily, influence vacuum circuit breaker's the problem of service performance. An object of the utility model is to provide a three station vacuum circuit breaker for solve foretell technical problem.

In order to achieve the above object, the utility model provides a two-way atress spring unit adopts following technical scheme:

the bidirectional stress spring assembly comprises a mandrel, a mandrel outer sleeve, a spring and a spacer sleeve, wherein the mandrel outer sleeve is sleeved outside the mandrel, the spring and the spacer sleeve are sleeved outside the mandrel outer sleeve, and the first ends of the mandrel, the mandrel outer sleeve, the spring and the spacer sleeve respectively face the same axial side, and the second ends of the mandrel, the mandrel outer sleeve, the spring and the spacer sleeve respectively face the other opposite axial side; the first end of the mandrel is provided with a connecting structure, the mandrel is also provided with a first stop surface which is used for stop matching with the end surface of the first end of the mandrel outer sleeve, and the second end of the mandrel is provided with a second stop surface which is used for stop matching with the end surface of the second end of the spacer sleeve; the first end of the mandrel outer sleeve is provided with a first jacking structure for jacking the first end of the spring, and the first end of the spacer sleeve is provided with a second jacking structure for jacking the second end of the spring so as to enable the spring to be in a pre-compression state; the mandrel is provided with a mandrel perforation which extends along the axial direction and penetrates through the mandrel, the mandrel outer sleeve is provided with an outer sleeve perforation which extends along the axial direction and penetrates through the mandrel outer sleeve, the spacer sleeve is provided with a spacer sleeve perforation which extends along the axial direction and penetrates through the spacer sleeve, the mandrel perforation, the outer sleeve perforation and the spacer sleeve perforation are used for installing a pin shaft which simultaneously penetrates through the mandrel perforation, the outer sleeve perforation and the spacer sleeve perforation, after the pin shaft is installed, the two ends of the mandrel perforation are not contacted with the pin shaft, the first end of the spacer sleeve perforation is contacted with the pin shaft, and the second end of the outer sleeve perforation is contacted with the pin shaft; one of the pin shaft and the connecting structure is used for being in transmission connection with the operating mechanism, and the other one of the pin shaft and the connecting structure is used for being in transmission connection with the lever.

The beneficial effects of the above technical scheme are that: the utility model discloses the pioneering provides two-way atress spring unit spare, wherein the first end and the dabber stop cooperation of dabber overcoat, the second end and the dabber stop cooperation of spacer sleeve, and be provided with the spring of precompression between dabber overcoat and spacer sleeve for dabber overcoat and spacer sleeve are tightly pressed on dabber first stop face and the second stop face, make two-way atress spring unit spare keep its wholeness.

The spindle perforation, the outer sleeve perforation and the spacer bush perforation are arranged to facilitate the simultaneous penetration of the pin shaft, the connection structure of the pin shaft and the spindle can enable the bidirectional stress spring assembly to be applied to the three-station vacuum circuit breaker, for example, the pin shaft is connected to the lever, the connection structure is connected to the operating mechanism, when the operating mechanism pulls the whole bidirectional stress spring assembly to move, the spindle moves towards the direction of the first end, the pin shaft is connected with the lever, therefore, the pin shaft pulls the lever to rotate, and then the lever controls the action of the moving contact through the insulating pull rod, so that the contact between the moving contact and the static contact is realized, the bidirectional stress spring assembly moves as a whole in the process, and the relative position relation of each component does not change.

And then the operating mechanism continuously applies a pulling force to the mandrel, the moving contact, the insulating pull rod and the lever keep the positions immovable as the moving contact moves to the extreme position, and the corresponding pin shaft is connected with the lever, so the pin shaft can not move. Meanwhile, the spring is further compressed, and under the reaction force of the spring, the spindle sleeve has a tendency of moving towards the first end of the spindle, so that a force towards the first end is generated on the pin shaft at the second end of the sleeve through hole of the spindle sleeve, the resultant force direction on the pin shaft faces towards the first end, and then the lever is continuously pulled, so that the two contacts are tightly combined.

When the operating mechanism pushes the whole bidirectional stress spring assembly to move, the core shaft moves towards the direction of the second end, so that the pin shaft pushes the lever to rotate, the lever controls the moving contact to act through the insulating pull rod, the moving contact is contacted with the grounding contact, the bidirectional stress spring assembly moves as a whole in the process, and the relative position relation of all the parts does not change.

After that, the operating mechanism continuously applies thrust to the mandrel, and similarly, because the pin shaft cannot move, the first end of the spacer bush through hole of the spacer bush is kept abutted against the pin shaft, the spacer bush is kept still under the stop of the pin shaft, the first end of the mandrel outer sleeve is driven by the first stop surface on the mandrel to move towards the second end, at the moment, the pin shaft and the mandrel outer sleeve are separated from a contact state, and meanwhile, the second stop surface on the mandrel is far away from the end surface of the second end of the spacer bush. Meanwhile, the spring is further compressed, and under the reaction force of the spring, the spacer sleeve has a tendency of moving towards the second end of the mandrel, so that the first end of the spacer sleeve through hole of the spacer sleeve can generate a force towards the second end to the pin shaft, the resultant force direction on the pin shaft faces towards the second end, and the lever is further continuously pushed, so that the two contacts are tightly combined.

Conversely, when the pin is connected to the operating mechanism and the connecting structure is connected to the lever, the movement process is similar to the above scheme, and is not described in detail herein. The utility model provides a two-way atress spring assembly can make the round pin axle last atress, and then solves among the prior art moving contact motion back that targets in place, can't just paste tight static contact or ground contact and lead to appearing the clearance easily, influences vacuum circuit breaker's the problem of service performance.

Further, the mandrel comprises a mandrel body and a joint, the joint is fixedly connected with the first end of the mandrel body, the end face of one end, facing the mandrel body, of the joint forms the first stop face, and the joint is provided with the connecting structure.

The beneficial effects of the above technical scheme are that: a connecting structure is formed on the joint, so that the processing is convenient; the end surface of one end of the joint facing the mandrel body is utilized to form a first stop surface, and the first stop surface is formed by utilizing the structure of the first stop surface, so that the processing is simplified.

Furthermore, the joint is provided with a connecting plate, and the connecting structure is a connecting hole formed in the connecting plate and used for a connecting pin to pass through.

The beneficial effects of the above technical scheme are that: simple structure, convenient processing, convenient assembly.

Further, the joint and the mandrel body are fixedly connected through threads.

The beneficial effects of the above technical scheme are that: the installation is simple through the mode that sets up the screw thread, and dabber body and joint detachable fixed connection, when the spring of different elasticity need be changed in the later stage, conveniently dismantle the change.

Furthermore, a second outward turning edge extending outwards is arranged at the second end of the mandrel body, and the second outward turning edge faces the end face of the joint to form a second stop surface.

The beneficial effects of the above technical scheme are that: the manufacturing and processing are simple, and the forming is convenient.

Furthermore, the first jacking structure is a first gasket sleeved on the mandrel outer sleeve, a first outward-turned edge extending outwards is arranged at the first end of the mandrel outer sleeve, and the first gasket is in butt contact with the first outward-turned edge.

The beneficial effects of the above technical scheme are that: the first stop surface is formed by the sleeved first washer, so that the processing and the manufacturing are convenient.

Furthermore, the second jacking structure is a second gasket sleeved outside the mandrel outer sleeve, and the second gasket is in jacking fit with the end face of the first end of the spacer sleeve.

The beneficial effects of the above technical scheme are that: the second stop surface is formed by the sleeved second gasket, so that the processing and the manufacturing are convenient.

Furthermore, the bidirectional stress spring assembly further comprises a pin shaft, and the pin shaft simultaneously penetrates through the core shaft through hole, the outer sleeve through hole and the spacer bush through hole.

The beneficial effects of the above technical scheme are that: the pin shaft is arranged, so that the direct application of the bidirectional stress spring assembly is facilitated.

In order to achieve the above object, the utility model provides a three station vacuum circuit breaker adopts following technical scheme:

the three-station vacuum circuit breaker comprises a moving contact, a fixed contact, a grounding contact, an operating mechanism, a lever and an insulating pull rod, wherein the moving contact is connected with one end of the lever through the insulating pull rod; the first end of the mandrel is provided with a connecting structure, the mandrel is also provided with a first stop surface which is used for stop matching with the end surface of the first end of the mandrel outer sleeve, and the second end of the mandrel is provided with a second stop surface which is used for stop matching with the end surface of the second end of the spacer sleeve; the first end of the mandrel outer sleeve is provided with a first jacking structure for jacking the first end of the spring, and the first end of the spacer sleeve is provided with a second jacking structure for jacking the second end of the spring so as to enable the spring to be in a pre-compression state; the mandrel is provided with a mandrel perforation which extends along the axial direction and penetrates through the mandrel, the mandrel outer sleeve is provided with an outer sleeve perforation which extends along the axial direction and penetrates through the mandrel outer sleeve, the spacer sleeve is provided with a spacer sleeve perforation which extends along the axial direction and penetrates through the spacer sleeve, the mandrel perforation, the outer sleeve perforation and the spacer sleeve perforation are used for installing a pin shaft which simultaneously penetrates through the mandrel perforation, the outer sleeve perforation and the spacer sleeve perforation, after the pin shaft is installed, the two ends of the mandrel perforation are not contacted with the pin shaft, the first end of the spacer sleeve perforation is contacted with the pin shaft, and the second end of the outer sleeve perforation is contacted with the pin shaft; one of the pin shaft and the connecting structure is used for being in transmission connection with the operating mechanism, and the other one of the pin shaft and the connecting structure is used for being in transmission connection with the lever.

The beneficial effects of the above technical scheme are that: the utility model discloses three station vacuum circuit breakers among the prior art improve, have add two-way atress spring unit, wherein the first end and the dabber stop cooperation of dabber overcoat, the second end and the dabber stop cooperation of spacer sleeve, and be provided with the spring of precompression between dabber overcoat and spacer sleeve for dabber overcoat and spacer sleeve are tightly supported and are pressed on dabber first stop face and the second stop face, make two-way atress spring unit keep its wholeness.

And then the operating mechanism continuously applies a pulling force to the mandrel, the moving contact, the insulating pull rod and the lever keep the positions immovable as the moving contact moves to the extreme position, and the corresponding pin shaft is connected with the lever, so the pin shaft can not move. Meanwhile, the spring is further compressed, and under the reaction force of the spring, the mandrel outer sleeve has a tendency of moving towards the first end of the mandrel, so that a force towards the first end is generated on the pin shaft at the second end of the outer sleeve through hole of the mandrel outer sleeve, the resultant force direction on the pin shaft faces towards the first end, and the lever is continuously pulled, so that the two contacts are tightly combined.

Further, the joint is provided with a connecting plate, and the connecting structure is a connecting hole formed in the connecting plate and used for a connecting pin to penetrate through.

Further, the joint and the mandrel body are fixedly connected through threads.

Furthermore, a second outward-turning edge extending outwards is arranged at the second end of the mandrel body, and the second outward-turning edge faces the end face of the joint to form the second stop face.

The beneficial effects of the above technical scheme are that: the second stop surface is formed by the sleeved second gasket, and the processing and the manufacturing are convenient.

Furthermore, the bidirectional stress spring assembly further comprises a pin shaft, and the pin shaft simultaneously penetrates through the core shaft through hole, the outer sleeve through hole and the spacer sleeve through hole.

Drawings

Fig. 1 is a schematic view of an embodiment 1 of a bidirectional stressed spring assembly of the present invention;

fig. 2 is a schematic view of an embodiment 1 of a three-position vacuum circuit breaker according to the present invention (in this case, an open state);

FIG. 3 is a schematic diagram of the embodiment shown in FIG. 2 illustrating a grounding state;

fig. 4 is a schematic diagram of a closing state of the embodiment shown in fig. 2.

In the figure: 1. a pin shaft; 21. a joint; 22. a sleeving section; a 23 stop section; 24. punching a mandrel; 25. a connecting pin; 31. a first gasket; 32. sleeving a mandrel; 33. perforating the outer sleeve; 4. a spring; 51. a second gasket; 52. a spacer bush; 53. perforating the spacer bush; 61. a moving contact; 62. static contact; 63. a ground contact; 71. an insulating pull rod; 72. a lever; 73. two-way atress spring assembly.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention, i.e., the described embodiments are merely illustrative of some, but not all, of the embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, which may be present, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" or the like does not exclude the presence of additional identical elements in a process, method, article, or apparatus that comprises the element.

The features and properties of the present invention are described in further detail below with reference to examples.

The utility model discloses well three-station vacuum circuit breaker sets up two-way atress spring assembly between operating mechanism and lever, and this subassembly has the wholeness, can drive the lever motion, realizes three-station vacuum circuit breaker's isolation, the different operating mode of combined floodgate and ground connection, and the spring can last the round pin axle on the two-way atress spring assembly continuously to exert oneself when the skew balanced position of two-way atress spring assembly for the moving contact can with corresponding and the static contact or with ground contact combined closely.

Specifically, the utility model provides a three-station vacuum circuit breaker's embodiment 1 is as shown in fig. 2, and the fixed static contact 62 and the ground contact 63 that are provided with in the three-station vacuum circuit breaker, and moving contact 61 can follow the axial and move, can be connected with static contact 62 electricity when moving contact 61 upward movement, can be connected with ground contact 63 electricity when moving contact 61 downward movement. The two ends of the lever 72 are respectively connected with an insulating pull rod 71 and a bidirectional stress spring assembly 73, the insulating pull rod 71 is also connected with the moving contact 61, and the bidirectional stress spring assembly 73 is driven by the output end of the operating mechanism to move.

The bi-directional force spring assembly 73 in this embodiment is shown in fig. 1. The bi-directional force spring assembly 73 includes a spindle, a spindle outer sleeve 32, a spacer 52, and a spring 4. For convenience of description, the bi-directional stressed spring assembly in fig. 1 is defined as having the spindle, the spindle outer sleeve 32, the spring 4 and the spacer 52 at a first end in an upward direction and at a second end in a downward direction.

In the bidirectional stress spring assembly 73, the mandrel comprises a joint 21 and a mandrel body, and the part of the joint 21 close to the mandrel body is provided with an external thread section; the mandrel body comprises a sleeving section 22 and a stopping section 23, wherein the stopping section 23 is a second outward turning edge formed by the outward turning edge of the second end of the mandrel body, and the outer diameter of the stopping section 23 is larger than that of the sleeving section 22. The joint 21 is further provided with a connecting plate, the connecting plate is provided with a connecting hole for a connecting pin 25 to pass through, the connecting pin 25 is used for connecting the output end of the operating mechanism, and the sleeving section 22 is further provided with a mandrel through hole 24 which extends along the axial direction of the sleeving section 22 and penetrates through the sleeving section.

The sleeve section 22 is further sleeved with a spring 4, a first washer 31, a mandrel outer sleeve 32, a spacer 52 and a second washer 51, and the spring 4 is in a pre-compression state. Specifically, the first end of the mandrel shell 32 is provided with a first outward turned edge extending outwards, under the action of the spring, the first washer 31 is in abutting contact with the first outward turned edge on the mandrel shell 32, and at the moment, the surface of the joint 21 abutting against the end surface of the first end of the mandrel shell 32 forms a first stop surface to limit the upward movement of the mandrel shell 32. A jacket perforation 33 extending in the axial direction of the mandrel jacket 32 and penetrating the mandrel jacket 32 is also provided on the second end of the mandrel jacket 32. The second washer 51 abuts against the end surface of the first end of the spacer 52 under the action of the spring 4, and at this time, a second stop surface is formed on the stop section 23 at the surface abutting against the end surface of the second end of the spacer 52, so that the downward movement of the spacer is limited. The spacer 52 is further provided with a spacer through hole 53 extending in the axial direction of the spacer 52 and penetrating the spacer 52.

The bi-directional stressed spring assembly 73 further comprises a pin 1, and the pin 1 simultaneously penetrates through the mandrel through hole 24, the outer sleeve through hole 33 and the spacer through hole 53. Under the action of the spring 4, the pin shaft 1 is in a balance position, the pin shaft 1 is not in contact with both ends of the core shaft through hole 24 at the moment, the second end of the outer sleeve through hole 33 is in contact with the pin shaft 1, and the first end of the spacer bush through hole 53 is in contact with the pin shaft 1.

As shown in fig. 2, the three-position vacuum circuit breaker is in a switching-off state, when grounding is required, the output end of the operating mechanism drives the bidirectional stressed spring assembly 73 to move upward, the bidirectional stressed spring assembly 73 serves as an integral part to drive one end of the lever 72 to rotate upward, the other end of the lever 72 drives the insulating pull rod 71 to move downward, and after the movable contact 61 and the grounding contact 63 are contacted, the movable contact 61 reaches the limit position, as shown in fig. 3. The output end of the operating mechanism continuously pulls the bidirectional stressed spring assembly 73 to move upwards, the movable contact 61, the insulating pull rod 71 and the lever 72 keep the positions unchanged, and the corresponding pin shaft 1 is connected with the lever 72, so that the pin shaft 1 cannot move. At this time, because the second end of the outer sleeve through hole 33 of the mandrel outer sleeve 32 is kept in contact with the pin shaft 1, the mandrel outer sleeve 32 is kept stationary under the pulling of the pin shaft 1, the second end of the spacer bush 52 is driven by the second stop surface on the mandrel to move upwards, and the pin shaft 1 is separated from the spacer bush 52 at this time. The pin 1 abuts against the mandrel outer sleeve 32, and a gap is formed between the end surface of the first end of the mandrel outer sleeve 32 and the first stop surface, and under the action of the spring, the mandrel outer sleeve 32 has a tendency of moving upwards, so that an upward force is generated on the pin 1 at the second end of the outer sleeve through hole 33 of the mandrel outer sleeve 32, the resultant force on the pin 1 is upward, and the lever 72 is continuously pulled, so that the two contacts are tightly combined.

As shown in fig. 2, the three-position vacuum circuit breaker is in an open state, when the three-position vacuum circuit breaker needs to be closed, the output end of the operating mechanism drives the bidirectional force-bearing spring assembly 73 to move downward, the bidirectional force-bearing spring assembly 73 serves as an integral piece to drive one end of the lever 72 to rotate downward, the other end of the lever 72 drives the insulating pull rod 71 to move upward, and after the movable contact 61 and the fixed contact 62 are contacted, the movable contact 61 reaches the limit position, as shown in fig. 4. The output end of the operating mechanism continues to pull the bidirectional stressed spring assembly 73 to move downwards, and at the moment, the pin shaft 1 cannot move. Because the first end of spacer through hole 53 of spacer 52 is kept abutting against pin 1, spacer 52 is kept stationary while the first end of mandrel outer sleeve 32 is driven by the first stop surface on the mandrel to move downward under the stop of pin 1, and pin 1 and mandrel outer sleeve 32 are separated from the contact state. The pin shaft 1 and the spacer 52 abut against each other, and a gap is formed between the end surface of the second end of the spacer 52 and the second stop surface, and under the reaction force of the spring, the spacer 52 has a downward movement tendency, so that a downward force is generated on the pin shaft 1 at the first end of the spacer through hole 53 of the spacer 52, the resultant force on the pin shaft 1 is downward, and the lever 72 is continuously pushed, so that the two contacts are tightly combined.

The utility model provides an in three station vacuum circuit breaker's embodiment 2, to the setting of the second roof pressure structure on the spacer, this embodiment provides a new form of arranging. Specifically, unlike the embodiment 1 in which the spacer and the second gasket are separately provided, the second gasket is directly machined on the spacer in this embodiment, that is, the spacer and the second gasket are integrally formed.

The utility model provides an in three station vacuum circuit breaker's embodiment 3, to the setting of the first roof pressure structure on the dabber overcoat, this embodiment provides a new form of arranging. Specifically, unlike the embodiment 1 in which the mandrel outer sleeve and the first gasket are separately provided, in this embodiment, the first gasket is directly machined on the mandrel outer sleeve, that is, the mandrel outer sleeve and the first gasket are integrally formed.

The utility model provides an in three station vacuum circuit breaker's embodiment 4, to the formation of second stop surface on the dabber body, propose a new form of arranging in this embodiment. Specifically, unlike the embodiment 1 in which the stop section is formed on the outward-turned edge of the mandrel body, in this embodiment, the nut is disposed on the sleeve section of the mandrel, and the nut is in stop fit with the second end of the spacer, and a surface of the nut facing the joint is a second stop surface.

The utility model provides an in three station vacuum circuit breaker's embodiment 5, to the cooperation of spindle top connection and dabber body, this embodiment provides a new form of arranging. Specifically, unlike the embodiment 1 in which the stud is provided on the joint and the screw hole is provided on the mandrel body, the embodiment in which the screw hole is provided on the joint and the stud is provided on the mandrel body, the joint and the mandrel body are fixedly connected by a thread. At the moment, the surface of the joint, which is in contact with the end face of the first end of the mandrel body, is a first stop surface.

The utility model provides an in three station vacuum circuit breaker's embodiment 6, to the connecting plate on the joint of dabber, this embodiment provides a new form of arranging. Specifically, unlike the embodiment 1 in which a connecting plate is provided on the joint of the mandrel, and a connecting pin is provided on the connecting plate to be connected and matched with the output end of the operating mechanism, in this embodiment, the connecting plate is not provided, a hole is directly formed in the position of the joint, which is far away from the mandrel body, and the connecting pin is provided in the hole, and the output end of the operating mechanism is driven by the connection with the connecting pin.

The utility model provides an in three station vacuum circuit breaker's embodiment 7, to the fixed connection's of spindle top connection and dabber body form, this embodiment provides a new form of arranging. Specifically, different from the detachable fixed connection between the joint of the mandrel and the mandrel body in embodiment 1, in this embodiment, the joint of the mandrel and the mandrel body are fixedly connected together by welding, at this time, a surface of the joint adjacent to the mandrel body is a plane, and a surface of the joint contacting the mandrel body is a first stop surface.

In the utility model provides an in three station vacuum circuit breaker's embodiment 8, to being connected with operating device output and lever, the present embodiment provides a new form of arranging. Specifically, unlike the embodiment 1 in which the connecting pin is connected to the output end of the operating mechanism and the pin shaft is fixedly connected to the lever, the embodiment in which the connecting pin is connected to the lever and the pin shaft is connected to the output end of the operating mechanism.

The utility model provides an in three station vacuum circuit breaker's embodiment 9, to the setting of round pin axle, this embodiment provides a new form of arranging. Specifically, different from the embodiment 1 in which the pin shaft is disposed on the bidirectional stressed spring assembly for use, in this embodiment, a through hole capable of placing the pin shaft is reserved on the bidirectional stressed spring assembly, and the pin shaft is configured by itself according to the user's needs.

In the utility model provides an in three station vacuum circuit breaker's embodiment 10, to the setting of dabber, this embodiment provides a new form of arranging. Specifically, different from the embodiment 1 in which the joint and the sleeve section on the mandrel body are detachable, in this embodiment, an additional joint is not provided, and a step surface is formed at the first end of the mandrel to serve as a first stop surface.

The utility model discloses well two-way atress spring unit's embodiment does: the specific structure of the bidirectional stressed spring assembly is the same as that of the bidirectional stressed spring assembly in any embodiment of the three-station vacuum circuit breaker, and the description is not repeated here.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, the scope of the present invention is defined by the appended claims, and all the structural changes equivalent to the content of the description and the attached drawings should be included in the same way.

Claims

1. Two-way atress spring unit spare, its characterized in that: the device comprises a mandrel, a mandrel outer sleeve sleeved outside the mandrel, a spring and a spacer sleeve sleeved outside the mandrel outer sleeve, wherein the first ends of the mandrel, the mandrel outer sleeve, the spring and the spacer sleeve respectively face to the same axial side, and the second ends of the mandrel, the mandrel outer sleeve, the spring and the spacer sleeve respectively face to the other opposite side; the first end of the mandrel is provided with a connecting structure, the mandrel is also provided with a first stop surface which is used for stop matching with the end surface of the first end of the mandrel outer sleeve, and the second end of the mandrel is provided with a second stop surface which is used for stop matching with the end surface of the second end of the spacer sleeve; the first end of the mandrel outer sleeve is provided with a first jacking structure for jacking the first end of the spring, and the first end of the spacer sleeve is provided with a second jacking structure for jacking the second end of the spring so as to enable the spring to be in a pre-compression state; the mandrel is provided with a mandrel through hole which extends along the axial direction and penetrates through the mandrel, the mandrel outer sleeve is provided with an outer sleeve through hole which extends along the axial direction and penetrates through the mandrel outer sleeve, the spacer sleeve is provided with a spacer sleeve through hole which extends along the axial direction and penetrates through the spacer sleeve, the mandrel through hole, the outer sleeve through hole and the spacer sleeve through hole are used for installing a pin shaft which penetrates through the mandrel through hole, the spacer sleeve through hole and the spacer sleeve through hole simultaneously, two ends of the mandrel through hole are not in contact with the pin shaft, a first end of the spacer sleeve through hole is in contact with the pin shaft, and a second end of the outer sleeve through hole is in contact with the pin shaft; one of the pin shaft and the connecting structure is used for being in transmission connection with the operating mechanism, and the other one of the pin shaft and the connecting structure is used for being in transmission connection with the lever.

2. The bi-directional force spring assembly of claim 1, wherein: the mandrel comprises a mandrel body and a joint, the joint is fixedly connected with the first end of the mandrel body, the end face of one end, facing the mandrel body, of the joint forms a first stop face, and the joint is provided with the connecting structure.

3. The bi-directional force spring assembly of claim 2, wherein: the connector is provided with a connecting plate, and the connecting structure is a connecting hole which is formed in the connecting plate and used for a connecting pin to penetrate through.

4. The bi-directional force spring assembly of claim 2 or 3, wherein: the joint and the mandrel body are fixedly connected through threads.

5. The bi-directional force spring assembly of claim 2 or 3, wherein: the second end of the mandrel body is provided with a second outward turning edge extending outwards, and the second outward turning edge faces the end face of the joint to form the second stop face.

6. The bi-directional force spring assembly of any one of claims 1-3, wherein: the first jacking structure is a first gasket sleeved on the mandrel outer sleeve, a first outward-turned edge extending outwards is arranged at the first end of the mandrel outer sleeve, and the first gasket is in abutting contact with the first outward-turned edge.

7. The bi-directional force spring assembly of any one of claims 1-3, wherein: the second jacking structure is a second gasket sleeved outside the mandrel outer sleeve, and the second gasket is in jacking fit with the end face of the first end of the spacer sleeve.

8. The bi-directional force spring assembly of any one of claims 1-3, wherein: the bidirectional stress spring assembly further comprises a pin shaft, and the pin shaft simultaneously penetrates through the core shaft through hole, the outer sleeve through hole and the spacer sleeve through hole.

9. Three station vacuum circuit breakers, including moving contact, static contact, ground contact, operating device, lever and insulating pull rod, the moving contact passes through the insulating pull rod and is connected its characterized in that with the one end of lever: the operating mechanism is connected with the other end of the lever through a bidirectional stress spring assembly, and the bidirectional stress assembly is the same as the bidirectional stress spring assembly in any one of claims 1-8 in structure.