CN209947771U

CN209947771U - Bistable electromagnetic mechanism

Info

Publication number: CN209947771U
Application number: CN201921040190.4U
Authority: CN
Inventors: 丁冬明; 毛海锋
Original assignee: Following Electrical Equipment Ltd Co In Suzhou
Current assignee: Following Electrical Equipment Ltd Co In Suzhou
Priority date: 2019-07-05
Filing date: 2019-07-05
Publication date: 2020-01-14
Anticipated expiration: 2029-07-05

Abstract

The utility model relates to a bistable electromagnetic mechanism, which comprises a base, an electromagnetic assembly arranged in the base and a limit assembly driven by the electromagnetic assembly, wherein the limit assembly comprises a positioning piece, a driving piece and a rotating piece, the positioning piece is provided with a working high position and a working low position, and the driving piece drives the rotating piece to rotate in the positioning piece and to stop at the working high position or the working low position for positioning; the electromagnetic assembly enables the driving piece to move up and down. Through adopting above-mentioned protection mechanism, under restriction circuit breaker combined floodgate operating condition, the mechanical structure of adoption carries on spacingly, and the electromagnetism subassembly does not switch on, and the electromagnetism subassembly only switches on work state and the non-operating state switches on work state under the transient state that the non-operating state changes operating condition into, has improved this protection mechanism operating condition's stability to manufacturing cost has been reduced, the life of extension electromagnetism subassembly, thereby the emergence of incident in the reduction circuit system.

Description

Bistable electromagnetic mechanism

Technical Field

The utility model belongs to the technical field of the circuit breaker control technique and specifically relates to a bistable electromagnetic mechanism for in electric operating mechanism is related to.

Background

A circuit breaker is a switching device for making or breaking an electric circuit, and plays a role in protection and control in an electric power system; when a power system has a fault, the circuit breaker can execute a disconnection operation, and meanwhile, a protection mechanism is needed to ensure that the circuit breaker cannot perform a closing operation when the power system has the fault; at present, this kind of protection machanism adopts the electro-magnet to control more, accomplishes the restriction that protection machanism operating condition's transformation realized closing to the circuit breaker through circular telegram or outage, and in the in-service use process, to this operating condition of restriction closing, it keeps to need the electro-magnet to last circular telegram, and the voltage input that the electro-magnet received is very unstable simultaneously, causes the harm to the electro-magnet very easily, can reduce electro-magnet life like this, and operating condition will receive the influence of electro-magnet, takes place the incident very easily.

Disclosure of Invention

The utility model aims to solve the technical problem that a bistable electromagnetic mechanism is provided, operating condition can not receive electromagnet's influence, reduces the emergence of incident, simultaneously reduce cost.

The utility model provides a technical scheme that its technical problem adopted is: a bistable electromagnetic mechanism comprises a base, an electromagnetic assembly arranged in the base and a limit assembly driven by the electromagnetic assembly, wherein the limit assembly comprises a positioning piece, a driving piece and a rotating piece; the electromagnetic assembly enables the driving piece to move up and down.

More specifically, the positioning element is fixed on the base, the positioning element is provided with at least one working high position and at least one working low position, and a fixed inclined plane for driving the rotating element to rotate is arranged between the working high position and the working low position; and a limiting groove is arranged at the working low position.

Further specifically, the driving piece comprises a driving body, spline teeth arranged at the top of the driving body and limiting blocks positioned on two sides of the driving body, wherein the limiting blocks are arranged in limiting grooves.

Further specifically, the rotating member includes a rotating body, a rotating portion disposed at a lower portion of the rotating body and extending downward, and a working portion disposed at an upper portion of the rotating body, wherein a bottom of the rotating portion is inclined to form a rotating inclined surface.

More specifically, when the rotating member is located at the working low position, the limiting block and the rotating part are both located in the limiting groove, the rotating inclined plane is in contact with the spline teeth and is located at the upper half part of the spline teeth, and the rotating part is located at the working low position; when the rotating piece moves to the working high position, the limiting block moves upwards in the limiting groove, the spline teeth push the rotating part to move upwards, the spline teeth are connected with the fixed inclined plane, and the rotating inclined plane enters the working high position along the fixed inclined plane.

More specifically, the bottom of the limiting groove is provided with a baffle for preventing the driving piece from continuously moving downwards.

Further specifically, the electromagnetic assembly comprises a magnetic core, a coil arranged on the magnetic core, and a magnetic ejector rod arranged in the magnetic core, wherein the top of the magnetic ejector rod is used for jacking the driving piece.

More specifically, an elastic piece is arranged between the rotating piece and the base, and the elastic piece enables the rotating piece to be close to the positioning piece.

More specifically, the elastic element is a compression spring.

The utility model has the advantages that: through adopting above-mentioned protection mechanism, under restriction circuit breaker combined floodgate operating condition, the mechanical structure of adoption carries on spacingly, and the electromagnetism subassembly does not switch on, and the electromagnetism subassembly only switches on work state and the non-operating state switches on work state under the transient state that the non-operating state changes operating condition into, has improved this protection mechanism operating condition's stability to manufacturing cost has been reduced, the life of extension electromagnetism subassembly, thereby the emergence of incident in the reduction circuit system.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic sectional view of the present invention;

FIG. 3 is a schematic view of the structure of the base and the positioning member of the present invention;

FIG. 4 is a schematic cross-sectional view of the base and the positioning member of the present invention;

FIG. 5 is an enlarged schematic view of the portion A in FIG. 4;

fig. 6 is a schematic structural diagram of the driving member of the present invention;

fig. 7 is a schematic structural view of the rotating member of the present invention.

In the figure: 1. a base; 2. an electromagnetic assembly; 3. a limiting component; 11. a rectangular frame body; 12. a pipe body; 21. a magnetic core; 22. a magnetic ejector rod; 31. a positioning member; 32. a drive member; 33. a rotating member; 111. a positioning bar; 112. a limiting strip; 311. positioning a groove; 312. a limiting groove; 313. a first fixed ramp; 314. a second fixed ramp; 315. a baffle plate; 321. a drive body; 322. a limiting block; 323. flower teeth; 331. rotating the body; 332. a rotating part; 333. rotating the inclined plane; 334. a working part; 335. an annular groove.

Detailed Description

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

As shown in fig. 1 and 2, a bistable electromagnetic mechanism includes a base 1, an electromagnetic assembly 2 disposed in the base 1, and a limit assembly 3 driven by the electromagnetic assembly 2, where the limit assembly 3 includes a positioning element 31, a driving element 32, and a rotating element 33, the positioning element 31 is provided with a working high position and a working low position, and the driving element 32 drives the rotating element 33 to rotate in the positioning element 31 and to stop at the working high position or the working low position for positioning; the solenoid assembly 2 causes the driver 32 to move up and down. The electromagnetic component 2 is only electrified to work in the transition state from the high position to the low position and from the low position to the high position, and the electromagnetic component 2 is not electrified in the high position and the low position, so that the state is more stable.

As shown in fig. 3, 4 and 5, the base 1 includes a rectangular frame 11 having a lower portion for positioning the electromagnetic assembly 2, a tube 12 located at the top of the rectangular frame 11 is a cover body sleeved on the top of the tube 12, a through hole is formed in the middle of the cover body, a clamping tenon is arranged on the outer wall of the tube 12, a clamping groove is correspondingly arranged in the cover body, the clamping groove is matched with the clamping tenon, and a positioning strip 111 and a limiting strip 112 are arranged on the inner wall of the rectangular frame 11, so that the electromagnetic assembly 2 can be accurately and quickly positioned and installed; the positioning member 31 is fixed on the inner wall of the tube body 12, meanwhile, a through hole is formed in the middle of the positioning member 31, the positioning member 31 and the tube body 12 can be integrally formed, the positioning member 31 is provided with 4 limiting grooves 312, the limiting grooves 312 are uniformly arranged on the positioning member 31, and a positioning groove 311 is arranged between every two adjacent limiting grooves 312, so that the number of the positioning grooves 311 is 4, the lowest point of the positioning groove 311 is higher than the working point of the limiting groove 312, the positioning groove 311 is a working high position, and the positioning groove 312 is a working low position; a fixing inclined plane is arranged between the positioning groove 311 and the limiting groove 312, the fixing inclined plane has 4 groups, each group is composed of 2 positioning inclined planes, namely a first fixing inclined plane 313 from a working low position to a working high position and a second fixing inclined plane 314 from the working high position to the working low position; the bottom of the limiting groove 312 is provided with a baffle 315, which can limit the positions of the driving member 32 and the rotating member 33 and prevent the driving member and the rotating member from falling out of the limiting groove 312.

As shown in fig. 6, the driving member 32 includes a driving body 321, spline teeth 323 disposed on the top of the driving body 321, and limit blocks 322 disposed on two sides of the driving body 321, the limit blocks 322 are disposed in the limit grooves 312 on the positioning member 31, and the number of the corresponding limit blocks 322 is also 4, the electromagnetic assembly 2 enables the driving body 321 to move up and down, the limit blocks 322 move up and down in the limit grooves 312, due to the effect of the limit grooves 312, the driving member 32 can only move up and down, the outer diameter of the driving body 321 is smaller than the inner diameter of the positioning member 31, and meanwhile, the limit blocks 32 are clamped in the limit grooves 312, so as to enable the driving member 32 to move; the spline 323 is composed of a plurality of symmetrical inclined planes, the spline 323 has 8 tooth profiles, the 8 tooth profiles are arranged in one-to-one correspondence with the 4 positioning grooves 311 and the 4 limiting grooves 312, the upper half part of each tooth profile is overlapped with the corresponding positioning groove 311 or limiting groove 312, and the lower half part is overlapped with the first fixed inclined plane 313 or the second fixed inclined plane 314. In order to reduce the weight, the driving body 321 has a cavity therein, and the cavity is open at an upper portion thereof.

As shown in fig. 7, the rotary member 33 includes a rotary body 331, a rotary part 332 disposed at a lower portion of the rotary body 331 and extending downward, and a working part 334 disposed at an upper portion of the rotary body 331, wherein a bottom of the rotary part 332 is inclined to a rotary inclined surface 333; the rotating portion 332 is provided with 4 rotating portions, the outer diameter formed by the 4 rotating portions is larger than the inner diameter of the through hole of the positioning member 31 and smaller than the inner diameter of the pipe body 12, the rotating portion 332 can be inserted into the limiting groove 312, the rotating inclined surface 333 at the bottom of the rotating portion 332 can be in contact with the spline 323 in the radial direction and needs to be in contact with the fixed inclined surface, namely, the rotating inclined surface 333 is divided into an inner portion and an outer portion in the radial direction, the outer portion is in contact with the fixed inclined surface in the working process, and the inner portion is in contact with the spline 323 in the working process. An elastic body is arranged between the rotating body 331 and the cover body, the elastic body can enable the rotating body 331 to approach the positioning member 31, and the elastic member is a compression spring. The working part 334 is a push rod, the push rod passes through the through hole in the middle of the cover body, the compression spring is sleeved on the push rod, meanwhile, a circle of annular groove 335 is formed in the rotating body 331, the push rod is arranged in the middle of the annular groove 335, one end of the compression spring is clamped in the annular groove 335, and the other end of the compression spring abuts against the cover body to limit the compression spring.

As shown in fig. 2, the electromagnetic assembly 2 includes a magnetic core 31, a coil disposed on the magnetic core 31, and a magnetic ejector rod 22 disposed in the magnetic core 21, wherein the top of the magnetic ejector rod 22 is used for ejecting the driving member 32, and a primary upward movement of the magnetic ejector rod 32 is realized by energizing the coil once.

The bistable electromagnetic mechanism comprises a working state, a non-working state and two transition states, wherein the working state is an opening working state at a working high position, the non-working state is a closing working state at a working low position, the two transition states are respectively a closing transition state from the working high position to the working low position and an opening transition state from the working low position to the working high position, and the opening working state, the closing transition state, the closing working state and the opening transition state are sequentially described below.

The opening working state is a static working state, at this time, the rotating part 332 is positioned in the positioning groove 311, and the ejector rod forces the electric operating mechanism to be in the opening state, so that the breaker cannot be switched on; the limit block 322 of the driving member 32 is located in the limit groove 312, and due to the action of the baffle 315 at the bottom of the limit groove 312, the driving member 32 is located at the lowest end of the limit groove 312, and the driving member 32 is not in contact with the rotating member 33; the electromagnetic assembly 2 is not energized.

The closing transition state is a dynamic process, the electromagnetic assembly 2 is electrified to trigger, a coil in the electromagnetic assembly 2 is electrified to form a magnetic field, the magnetic ejector rod 22 moves upwards, the magnetic ejector rod 22 is in contact with the driving body 321 and pushes the driving body 321 to move upwards, and the driving body 321 only can move along the axial direction due to the action of the limiting block 322 and the limiting groove 312 on the driving body 321; when the driving member 32 contacts with the rotating member 33, that is, the spline 323 contacts with the rotating inclined surface 333 of the rotating part 332, the driving member 32 pushes the rotating member 33 to continue moving upward, when the rotating member 33 is separated from the positioning slot 312, the tooth form of the spline 323 is connected with the second fixed inclined surface 314 to form a communicated inclined surface, because the rotating inclined surface 333 only contacts with the upper half part of the tooth form of the spline 323 at this time, and there is no limitation of the positioning slot 312, the rotating inclined surface 333 continues sliding towards the lower half part of the tooth form of the spline 323, and when the rotating inclined surface 333 enters into the lower half part of the tooth form of the spline 323, the rotating inclined surface 333 enters into the second fixed inclined surface 314 at; at this time, the electromagnetic assembly 2 is powered off, the magnetic ejector rod 22 returns to the initial position due to gravity and no longer provides power for the driving member 32, the driving member 32 moves downward due to gravity and falls back into the limit groove 312, the rotating inclined surface 333 is no longer in contact with the spline 323 and only contacts with the second fixed inclined surface 314, the rotating portion 332 moves downward along the second fixed inclined surface 314 and obliquely enters the limit groove 312, and when the rotating inclined surface 333 contacts with the spline 323 in the limit groove 312, the working position is low.

The closing working state is a static working state, at this time, the limiting block 322 and the rotating part 332 are positioned in the limiting groove 312, the rotating inclined plane 333 is contacted with the upper half part of the tooth form of the spline 323, the ejector rod is separated from the contact of the electric operating mechanism, and at this time, the breaker can be switched on at any time; the electromagnetic assembly 2 is not energized.

The opening transition state is a dynamic process, the electromagnetic assembly 2 is powered on, so that the magnetic ejector rod 22 moves upwards, the magnetic ejector rod 22 pushes the driving piece 32 and the rotating piece 33 to move upwards along the axial direction, when the driving piece 32 and the rotating piece 33 move to the highest point, the tooth profile of the spline 323 and the first inclined plane 313 form a communicated inclined plane, the rotating part 332 is not blocked by the limiting groove 312, the rotating inclined plane 333 enters the first fixed inclined plane 313 along the tooth profile of the spline 323, at the moment, the electromagnetic assembly 2 is powered off, the magnetic ejector rod 22 falls back, the driving piece 32 falls back, and the rotating inclined plane 333 enters the positioning groove 311 along the first fixed inclined plane 313 and enters the working high position.

To sum up, two kinds of stable states appear after adopting above-mentioned mechanism, for operating condition and non-operating condition, and these two kinds of states all realize through interact between the mechanical structure, and operating condition no longer adopts the circular telegram of electromagnetic component 2 to keep in the use, and electromagnetic component 2 only is triggering the in-process circular telegram and uses, has improved the stability of this mechanism like this greatly, reduction in production cost has reduced the emergence of incident simultaneously.

It is to be emphasized that: the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form, and any simple modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are all within the scope of the technical solution of the present invention.

Claims

1. A bistable electromagnetic mechanism comprises a base (1), an electromagnetic assembly (2) arranged in the base (1) and a limit assembly (3) driven by the electromagnetic assembly (2), and is characterized in that the limit assembly (3) comprises a positioning piece (31), a driving piece (32) and a rotating piece (33), the positioning piece (31) is provided with a working high position and a working low position, and the driving piece (32) drives the rotating piece (33) to rotate in the positioning piece (31) and to stop at the working high position or the working low position for positioning; the electromagnetic assembly (2) enables the driving piece (32) to move up and down.

2. The bistable electromagnetic mechanism according to claim 1, wherein said positioning member (31) is fixed on the base (1), said positioning member (31) has at least one working high position and at least one working low position, between which a fixed inclined surface is provided for driving the rotation member (33) to rotate; and a limiting groove (312) is arranged at the working low position.

3. The bistable electromagnetic mechanism of claim 2, wherein the driving member (32) comprises a driving body (321), a spline (323) disposed on the top of the driving body (321), and a stopper (322) disposed on both sides of the driving body (321), wherein the stopper (322) is disposed in the stopper groove (312).

4. The bistable electromagnetic mechanism according to claim 3, wherein said rotating member (33) comprises a rotating body (331), a rotating portion (332) disposed at the lower portion of the rotating body (331) and extending downward, and a working portion (334) disposed at the upper portion of the rotating body (331), and the bottom of said rotating portion (332) is inclined as a rotating slope (333).

5. The bistable electromagnetic mechanism according to claim 4, wherein when the rotating member (33) is in the working low position, the limit block (322) and the rotating portion (332) are both in the limit groove (312), the rotating inclined surface (333) is in contact with the spline teeth (323) and positioned at the upper half of the spline teeth (323), and the rotating portion (332) is in the working low position; when the rotating piece (33) moves to the working high position, the limiting block (322) moves upwards in the limiting groove (312), the spline teeth (323) push the rotating part (332) to move upwards, the spline teeth (323) are connected with the fixed inclined plane, and the rotating inclined plane (333) enters the working high position along the fixed inclined plane.

6. The bistable electromagnetic mechanism of claim 2 wherein the bottom of said retaining groove (312) is provided with a stop (315) that prevents the driver (32) from continuing to move downward.

7. The bistable electromagnetic mechanism of claim 1, wherein the electromagnetic assembly (2) comprises a magnetic core (21), a coil disposed on the magnetic core (21), and a magnetic plunger (22) disposed in the magnetic core (21), the top of the magnetic plunger (22) being used to jack up the driving member (32).

8. The bistable electromagnetic mechanism of claim 1, wherein an elastic member is provided between said rotating member (33) and said base (1), said elastic member causing said rotating member (33) to move toward said positioning member.

9. The bistable electromagnetic mechanism of claim 8, wherein said resilient member comprises a compression spring.