CN216311625U

CN216311625U - Permanent-magnet bidirectional bistable operating mechanism

Info

Publication number: CN216311625U
Application number: CN202122531495.9U
Authority: CN
Inventors: 王静洋
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-10-20
Filing date: 2021-10-20
Publication date: 2022-04-15
Anticipated expiration: 2031-10-20

Abstract

The utility model provides a permanent magnet bidirectional bistable operating mechanism which comprises a permanent magnet mechanism, wherein the permanent magnet mechanism comprises a permanent magnet, an iron core and a coil, a through hole is formed in the axial direction of the iron core, cap covers are arranged at two ends of the iron core respectively, a mounting hole which is opposite to the iron core is formed in each cap cover, a screw rod which is in clearance fit with the through hole is inserted in the iron core, a pressure spring which is sleeved on the screw rod is arranged in the through hole, gaskets which are connected with the screw rod and abut against the cap covers are arranged at two ends of the screw rod respectively, and two ends of the pressure spring abut against the gaskets at two ends of the screw rod respectively. The utility model has simple structure, convenient installation and high synchronism.

Description

Permanent-magnet bidirectional bistable operating mechanism

Technical Field

The utility model relates to the technical field of control of a withstanding voltage device, in particular to a permanent magnet bidirectional bistable operating mechanism.

Background

In the field of high and low voltage switches, two switch operating mechanisms are generally adopted. One is a spring energy storage type operating mechanism, and the other is an electromagnetic operating mechanism. The two operating mechanisms are far lower than the permanent magnet operating mechanism advocated for use at home and abroad only in terms of reliability, because the permanent magnet operating mechanism only has one moving part.

At present, electric products utilizing a vacuum arc extinguish chamber mainly have two categories at home and abroad: vacuum contactors and high voltage vacuum circuit breakers. The two products have good on-off performance and stable and reliable electric service life, and are widely applied to important places with harsh working conditions. For example, a VM1 model permanent magnet actuator vacuum circuit breaker manufactured by ABB corporation and a domestic CKJ5 series vacuum circuit breaker.

The prior Chinese patent with the patent number of ZL201820732805.9 and the patent name of dual-power automatic switching device discloses a dual-power automatic switching device, which comprises two vacuum tubes with the same type and a bistable permanent magnet electromagnet between the two vacuum tubes, and is characterized in that: the screw rod penetrates through the axis of the iron core of the bistable permanent magnet electromagnet, and the screw rod is in clearance fit with the iron core; two end parts of the screw rod are respectively in threaded connection with the moving contacts of the corresponding vacuum tubes, one end of the screw rod is provided with a length adjusting nut, and the total length H of the adjusted screw rod and the two moving contacts is equal to L-K, wherein the distance between the fixed contacts of the L vacuum tubes is the distance between the fixed contacts of the L vacuum tubes, and K is the distance between the vacuum tubes; the two end parts of the screw rod are sleeved with pressure springs, one end parts of the pressure springs are abutted against the iron core, and the other end parts of the pressure springs are abutted against the movable contact of the vacuum tube; when the coil is electrified, the iron core can be driven to move towards one side, the pressure spring on the side is compressed, the pressure spring drives the moving contact and the static contact of the vacuum tube on the side to be closed, and meanwhile, the screw rod can drive the moving contact and the static contact of the vacuum tube on the other side to be disconnected. The moving distance X of the iron core is K + C, wherein K is the contact opening distance of the vacuum tube, C is the pressure overtravel, and the pressure overtravel is the stroke required by the pressure spring to apply certain pressure to the close contact of the moving contact and the static contact. Pressure springs are sleeved at two ends of a screw rod, and the compression ratios of the pressure springs at the two ends are slightly different, so that the moving contacts of vacuum tubes at the two ends of the screw rod are poor in displacement synchronism, and the use of the vacuum tubes is influenced.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, an object of the present invention is to provide a permanent magnetic bi-directional bi-stable operating mechanism with simple structure, convenient installation and high synchronism.

Aiming at the problems, the following technical scheme is provided: the permanent magnet bidirectional bistable operating mechanism comprises a permanent magnet mechanism, wherein the permanent magnet mechanism comprises a permanent magnet, an iron core and a coil, a through hole is formed in the axial direction of the iron core, caps are arranged at the two ends of the iron core, a mounting hole which is communicated with the iron core relatively is formed in the caps, a lead screw which is in clearance fit with the through hole is inserted in the iron core, a pressure spring which is sleeved on the lead screw is arranged in the through hole, gaskets which are connected with the lead screw and are abutted against the caps are arranged at the two ends of the lead screw, and the two ends of the pressure spring are respectively abutted against the gaskets at the two ends of the lead screw.

In the structure, the two ends of the screw rod are respectively screwed with a vacuum tube, when the coil is electrified, the iron core is driven to drive the screw rod to move towards one side, the screw rod drives the moving contact and the static contact of the vacuum tube on the side to be closed, meanwhile, the screw rod drives the moving contact and the static contact of the vacuum tube on the other side to be disconnected, when the current direction of the coil is changed, the iron core moves towards the other side, the vacuum tube on the side is closed, the vacuum tubes on the two sides are driven by the permanent magnetic mechanism to be always in a closed state and interlocked, so that the utility model can be simply controlled as long as the current direction of direct current used by the coil is changed, the conversion time is extremely short, and uninterrupted load is realized. The pressure spring is arranged to apply pressure overtravel to the closed moving contact and the closed static contact, and the pressure overtravel is a stroke required by the pressure spring to apply certain pressure to the close contact of the moving contact and the static contact. The distance of the displacement of the iron core is equal to the distance between the opening distance of the vacuum tube and the pressure overtravel, so that when the iron core moves towards one side to the opening distance of the vacuum tube, the moving contact and the fixed contact at the side are in a closed state, and then the iron core continuously moves for the distance of the pressure overtravel value, so that the cap compresses the pressure spring, the tightness of the closing of the moving contact and the fixed contact of the vacuum tube in the displacement direction of the iron core is increased, the reliability of the closing of the vacuum tube is improved, and the safety of the vacuum tube is improved. Compared with the conventional dual-power automatic switching device, the dual-power automatic switching device has the advantages that the pressure spring is arranged, so that the state change synchronism of the vacuum tubes at the two ends of the screw rod is higher, and the stability and the reliability of the dual-power automatic switching device are improved. The gasket is arranged, so that the cap can be better matched with the pressure spring conveniently, and the stability and the reliability of the utility model are further improved.

The utility model is further provided that two ends of the screw rod are respectively provided with a first thread and a second thread, and the first thread and the second thread are arranged in opposite directions.

By adopting the structure, the opening distances of the vacuum tubes at the two ends of the screw rod can be adjusted simultaneously by rotating the screw rod, so that the convenience of use of the vacuum tube is improved.

The utility model is further arranged in that one end of the screw rod is provided with a fixed block which is in clearance fit with the mounting hole, one end of the fixed block is abutted against the corresponding gasket, and the section of the fixed block is hexagonal.

In the structure, the stability of the gasket can be improved by arranging the fixing block, and the pressure spring can be compressed by conveniently matching the cap, so that the stability of the pressure spring is improved. The cross section of the fixing block is hexagonal, so that a user can conveniently rotate the screw rod by matching the wrench with the fixing block, and the convenience of adjusting the opening distance of the vacuum tube is further improved.

The utility model is further provided that one end of the screw rod opposite to the fixed block is provided with an adjusting nut which is in clearance fit with the mounting hole, and one end of the adjusting nut is abutted against the corresponding gasket.

In the structure, the adjusting nut is arranged, so that the stability of the gasket at one corresponding end of the adjusting nut can be improved, and the pressure spring can be conveniently compressed by matching with the synchronous driving frame, so that the stability of the pressure spring is improved; the pressure overtravel adjusting device can also facilitate a user to adjust the value of the pressure overtravel by rotating the adjusting nut, so that the adjustment can be carried out according to the use requirement of the user, and the application range of the pressure overtravel adjusting device is expanded.

The utility model is further arranged that the caps are screwed to both ends of the core.

By adopting the structure, the assembly of the utility model can be facilitated, thereby improving the convenience of the utility model.

The utility model is further provided that the gasket is a U-shaped gasket.

By adopting the structure, the pressure spring can be conveniently limited and mounted, so that the stability of the pressure spring can be improved, and the reliability of the pressure spring is improved.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the vacuum tube type single-phase-change switch.

Fig. 3 is a schematic structural diagram of the vacuum tube type three-phase unbalanced phase change switch.

The reference numbers in the figures mean: 1-a permanent magnet mechanism; 2-iron core; 3-a coil; 4-a permanent magnet; 5-capping; 51-mounting holes; 6-a screw rod; 7-a pressure spring; 8-a gasket; 61-a fixed block; 62-adjusting the nut; 9-vacuum tube.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, back, front, and back) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

The permanent magnet bidirectional bistable operating mechanism shown in fig. 1 to 3 comprises a permanent magnet mechanism 1, wherein the permanent magnet mechanism 1 comprises a permanent magnet 4, an iron core 2 and a coil 3, a through hole is formed in the axial direction of the iron core 2, cap covers 5 are arranged at two ends of the iron core 2, a mounting hole 51 which is communicated with the iron core 2 relatively is formed in each cap cover 5, a lead screw 6 which is in clearance fit with the through hole is inserted into the iron core 2, a pressure spring 7 which is sleeved on the lead screw 6 is arranged in the through hole, gaskets 8 which are connected with the lead screw 6 and are abutted against the cap covers 5 are arranged at two ends of the lead screw 6, and two ends of each pressure spring 7 are respectively abutted against the gaskets 8 at two ends of the lead screw 6.

In the structure, the two ends of the screw rod 6 are respectively screwed with one vacuum tube 9, when the coil 3 is electrified, the iron core 2 is driven to drive the screw rod 6 to move towards one side, the screw rod 6 drives the moving contact and the static contact of the vacuum tube 9 at the side to be closed, meanwhile, the screw rod 6 drives the moving contact and the static contact of the vacuum tube 9 at the other side to be disconnected, when the current direction of the coil 3 is changed, the iron core 2 moves towards the other side, the vacuum tube 9 at the side is closed, the vacuum tubes 9 at the two sides are driven by the permanent magnet mechanism 1 to be always in a closed state and interlocked, so that the utility model can be simply controlled as long as the current direction of direct current used by the coil 3 is changed, the conversion time is extremely short, and uninterrupted load is realized. The pressure spring 7 is arranged to apply pressure overtravel to the closed moving contact and the closed static contact, and the pressure overtravel is a stroke required by the pressure spring 7 to apply certain pressure to the close contact of the moving contact and the static contact. The displacement distance of the iron core 2 is equal to the distance between the opening distance of the vacuum tube 9 and the pressure overtravel, so that when the iron core 2 moves towards one side to the opening distance of the vacuum tube 9, a moving contact and a fixed contact at the side are in a closed state, and then the iron core 2 continues to displace by the distance of the pressure overtravel value, so that the cap 5 compresses the pressure spring 7, the tightness of the closing of the moving contact and the fixed contact of the vacuum tube 9 in the displacement direction of the iron core 2 is increased, the reliability of the closing of the vacuum tube 9 is improved, and the safety of the vacuum tube 9 closing device is improved. Compared with the conventional dual-power automatic switching device, the dual-power automatic switching device has the advantages that the pressure spring 7 is arranged, so that the state change synchronism of the vacuum tubes 9 at the two ends of the screw rod 6 is higher, and the stability and the reliability of the dual-power automatic switching device are improved. The gasket 8 is arranged to better facilitate the matching between the cap 5 and the pressure spring 7, thereby further improving the stability and reliability of the utility model.

In this embodiment, the two ends of the screw rod 6 are respectively provided with a first thread and a second thread, and the first thread and the second thread are arranged in opposite directions.

By adopting the structure, the opening distance of the vacuum tubes 9 at the two ends of the screw rod 6 can be adjusted simultaneously by rotating the screw rod, so that the use convenience of the utility model is improved.

In this embodiment, a fixing block 61 in clearance fit with the mounting hole 51 is disposed at one end of the screw rod 6, one end of the fixing block 61 abuts against the corresponding gasket 8, and the cross section of the fixing block 61 is hexagonal.

In the above-mentioned structure, can improve the stability of gasket 8 through setting up fixed block 61, and can be convenient for cooperate cap 5 to compress pressure spring 7 to pressure spring 7's stability has been improved. By arranging the fixing block 61 with a hexagonal cross section, a user can conveniently rotate the screw rod 6 by matching the wrench with the fixing block 61, so that the convenience of adjusting the opening distance of the vacuum tube 9 is further improved.

In this embodiment, an adjusting nut 62 in clearance fit with the mounting hole 51 is disposed at an end of the screw rod 6 opposite to the fixing block 61, and one end of the adjusting nut 62 abuts against the corresponding spacer 8.

In the structure, the adjusting nut 62 is arranged to improve the stability of the gasket 8 at the corresponding end, and the cap 5 can be conveniently matched to compress the pressure spring 7, so that the stability of the pressure spring 7 is improved; the pressure overtravel value can be conveniently adjusted by a user through rotating the adjusting nut 62, so that the pressure overtravel value can be adjusted according to the use requirement of the user, and the application range of the pressure overtravel adjusting device is expanded.

In this embodiment, the cap 5 is screwed to both ends of the core 2.

In this embodiment, the gasket 8 is a U-shaped gasket 8.

By adopting the structure, the pressure spring 7 can be conveniently limited and mounted, so that the stability of the pressure spring 7 can be improved, and the reliability of the utility model is improved.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and those modifications and variations assumed in the above are also considered to be within the protective scope of the present invention.

Claims

1. Permanent magnetism two-way bistable state operating mechanism, including permanent magnetism mechanism, permanent magnetism mechanism includes permanent magnet, iron core and coil, its characterized in that: the iron core is characterized in that a through hole is formed in the axial direction of the iron core, caps are arranged at two ends of the iron core, a mounting hole which is communicated with the iron core relatively is formed in each cap, a lead screw which is in clearance fit with the through hole is inserted into the iron core, a pressure spring which is sleeved on the lead screw is arranged in the through hole, gaskets which are connected with the lead screw and are abutted to the caps are arranged at two ends of the lead screw, and two ends of the pressure spring are abutted to the gaskets at two ends of the lead screw respectively.

2. The permanent magnet bi-directional bi-stable operating mechanism of claim 1, wherein: and the two ends of the screw rod are respectively provided with a first thread and a second thread, and the first thread and the second thread are arranged in a reverse direction.

3. The permanent magnet bi-directional bi-stable operating mechanism of claim 2, wherein: one end of the screw rod is provided with a fixing block in clearance fit with the mounting hole, one end of the fixing block abuts against the corresponding gasket, and the cross section of the fixing block is hexagonal.

4. The permanent magnet bi-directional bi-stable operating mechanism of claim 3, wherein: and one end of the screw rod, which is opposite to the fixed block, is provided with an adjusting nut in clearance fit with the mounting hole, and one end of the adjusting nut abuts against the corresponding gasket.

5. The permanent magnet bi-directional bi-stable operating mechanism of claim 1 or 4, wherein: the caps are screwed to both ends of the core.

6. The permanent magnet bi-directional bi-stable operating mechanism of claim 1, wherein: the gasket adopts U type gasket.