CN214848458U - Magnetic release and circuit breaker with same - Google Patents
Magnetic release and circuit breaker with same Download PDFInfo
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- CN214848458U CN214848458U CN202121225167.XU CN202121225167U CN214848458U CN 214848458 U CN214848458 U CN 214848458U CN 202121225167 U CN202121225167 U CN 202121225167U CN 214848458 U CN214848458 U CN 214848458U
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Abstract
The utility model relates to a magnetic release and circuit breaker with the same, the magnetic release comprises an armature and an elastic reset piece for driving the armature to reset, and also comprises a first permanent magnet positioned in the middle, and a second permanent magnet and a third permanent magnet positioned at both sides of the first permanent magnet at equal intervals, both sides of the first permanent magnet and the second permanent magnet and the third permanent magnet at both sides are arranged with different polarities, the first permanent magnet is used as a first magnetic attraction end, the second permanent magnet and the third permanent magnet form a second magnetic attraction end, any one of the first magnetic attraction end and the second magnetic attraction end follows the deformation stroke of the elastic reset piece, the other opposite permanent magnet is fixedly arranged, thereby in the deformation stroke of the elastic reset piece, the mutual magnetic force of the first magnetic attraction end and the second magnetic attraction end is used for superposing and intervening the reset force of the reset piece, the armature is helped to overcome the elastic restoring force of the elastic reset piece when the armature moves, and the elastic restoring force is enabled to ensure the resetting of the armature to the maximum after the armature unlocking movement is finished.
Description
Technical Field
The utility model relates to a technical field, concretely relates to improvement of magnetic trip ware are made to the circuit breaker.
Background
The magnetic trip is one of the parts forming the molded case circuit breaker and consists of a conductor, an armature, a magnetic yoke, a supporting part, a push rod part, a counter force spring and the like. When a certain current passes through the conductor, magnetic flux is generated at the armature, the magnetic yoke and an air gap between the armature and the magnetic yoke due to the electromagnetic induction phenomenon, the magnetic line of force is a closed curve surrounding the conductor, and electromagnetic attraction is generated between the armature and the magnetic yoke. Because the magnetic yoke is fixed, the armature moves towards the magnetic yoke under the action of electromagnetic attraction, the push rod piece fixedly connected with the armature impacts and drags the circuit breaker locking mechanism to unlock the circuit breaker, and then the circuit breaker completes the functions of tripping and breaking, cuts off fault current and protects the safety of circuits and equipment.
The counter-force spring has the effects of meeting the anti-vibration requirement of the circuit breaker and preventing the circuit breaker from being unlocked automatically in the vibration process; and secondly, when the armature moves towards the magnetic yoke, the counter-force spring can be compressed to store energy, and when the conductor current disappears, the counter-force spring drives the armature to reset by the elastic restoring force of the counter-force spring. However, such a structure has a drawback that when the armature moves toward the yoke, the elastic restoring force of the reaction spring needs to be overcome, and under a small current, the electromagnetic attraction is small, and the armature cannot overcome the elastic restoring force of the reaction spring, so that the unlocking of the latch mechanism cannot be realized to complete the breaking function.
SUMMERY OF THE UTILITY MODEL
Therefore, to the above problem, the utility model provides a magnetic release of configuration optimization and circuit breaker that has this magnetic release through increasing the permanent magnet structure with higher speed, help armature to overcome reaction spring's elasticity restoring force.
The utility model discloses a following technical scheme realizes:
the utility model provides a magnetic release for the response passes through the electric current of conductor and drives the latched device unblock of circuit breaker, including armature and elasticity piece that resets, the armature has the motion stroke of realizing the latched device unblock, elasticity piece that resets is right through its deformation stroke the reset force is applyed to the armature, still include the first permanent magnet that is located the centre, and equally interval ground is located second permanent magnet and third permanent magnet of first permanent magnet both sides, the both sides of first permanent magnet are rather than the second permanent magnet and the third permanent magnet of both sides and are the polarity difference setting, the end is inhaled as first magnetism to first permanent magnet, second permanent magnet and third permanent magnet constitute second magnetism and inhale the end, any one of first magnetism inhale the end and second magnetism inhale the end follow the deformation stroke of elasticity piece, and relative another is fixed the setting, therefore, in the deformation stroke of the elastic resetting piece, the resetting force is superposed and intervened by the mutual magnetic force action of the first magnetic attraction end and the second magnetic attraction end.
Wherein, for the elasticity restoring force that helps armature to overcome the elasticity piece that resets in armature motion process to when the unblock motion stroke of armature was ended, increase the elasticity restoring force that the elasticity piece resets, through the relative motion of end is inhaled to first magnetism and second magnetism, the mutual magnetic force effect of end is inhaled to first magnetism and second magnetism is inhaled the end and is used in the initial stage-middle period-later stage of deformation stroke is to elasticity resets and apply a strength and is by little grow again by the reverse force that diminishes greatly.
Preferably, in the early stage to the middle stage of the deformation stroke, the second permanent magnet and the third permanent magnet attract the first permanent magnet to approach to each other, so that a reverse force from small to large is applied to the elastic resetting piece, and in the middle stage to the later stage of the deformation stroke, the first permanent magnet is inserted between the second permanent magnet and the third permanent magnet, so that a reverse force from large to small is applied to the elastic resetting piece.
In order to ensure that the elastic restoring force can maximally restore the armature after the armature unlocking movement is finished, in one embodiment, the first permanent magnet is finally inserted into the center positions of the second permanent magnet and the third permanent magnet, so that the attractive forces of the second permanent magnet and the third permanent magnet to the first permanent magnet are mutually offset.
Wherein, based on installation and manufacturing considerations, in one embodiment, the first, second, and third permanent magnets are sheet-like structures of uniform gauge.
In one embodiment, the motion stroke of the armature is linear movement, and the elastic reset piece is a pull spring or a compression spring; alternatively, in another embodiment, the movement stroke of the armature is a swing, and the elastic resetting member is a torsion spring.
Wherein, based on installation and manufacturing considerations, in an embodiment, the magnetic release further includes an unlocking piece, a guide rod and a support piece, the support piece is fixedly disposed, a guide hole is formed on the support piece, the guide rod penetrates and extends into the guide hole, the armature is fixedly connected with the guide rod, the elastic reset piece is a compression spring sleeved on the guide rod, the unlocking piece is sleeved on the guide rod and buckled on the compression spring, one end of the compression spring is abutted on the unlocking piece, the other end of the compression spring is abutted on the support piece, the first permanent magnet is fixedly connected on the unlocking piece, the second permanent magnet and the third permanent magnet are fixedly connected on the support piece, during the movement of the armature, the unlocking piece is driven to unlock the locking mechanism and compress the compression spring to enable the compression spring to generate the deformation stroke, so that the first magnetic attraction end fixedly connected on the unlocking piece is followed by the elastic reset piece The deformation stroke of (2).
In order to meet the design requirements of different tripping currents of the circuit breaker, in one embodiment, the distances between the second permanent magnet and the first permanent magnet and the distances between the third permanent magnet and the first permanent magnet are adjustable.
Based on foretell magnetic release, the utility model discloses still provide a circuit breaker, including latched device and foretell magnetic release.
The utility model discloses following beneficial effect has: the utility model forms a permanent magnet accelerating mechanism by arranging the first permanent magnet, the second permanent magnet and the third permanent magnet, and the permanent magnet suction force is smaller at the initial stage of the deformation stroke of the elastic resetting piece, thereby not influencing the motion of the armature and meeting the anti-seismic requirement; in the middle stage of the deformation stroke of the elastic reset piece, the permanent magnetic attraction force is gradually increased to help the armature to overcome the elastic restoring force of the elastic reset piece, and the armature can complete the motion process under a smaller current, so that tripping and breaking are realized, and the electricity safety is guaranteed; at the later stage of the deformation stroke of the elastic reset piece, the permanent magnetic attraction force is mutually offset, the elastic restoring force of the elastic reset piece is the maximum, and the reset of the armature is ensured.
Drawings
Fig. 1 is a schematic perspective view (one) of a circuit breaker according to embodiment 1;
fig. 2 is a schematic perspective view (second) of the circuit breaker according to embodiment 1;
fig. 3 is an exploded view of the circuit breaker in embodiment 1;
FIG. 4 is a schematic perspective view of the magnetic release in example 1;
FIG. 5 is an exploded view of the magnetic release in embodiment 1;
FIG. 6 is a schematic view of a permanent magnet accelerating mechanism provided on the magnetic release in embodiment 1;
fig. 7 is a schematic position diagram of the first permanent magnet, the second permanent magnet, and the third permanent magnet when the armature has not moved toward the yoke in embodiment 1;
fig. 8 is a schematic position diagram of the first permanent magnet, the second permanent magnet and the third permanent magnet during the movement of the armature toward the yoke in embodiment 1;
fig. 9 is a schematic position diagram of the first permanent magnet, the second permanent magnet and the third permanent magnet when the armature finishes the first movement stroke of the armature to the magnetic yoke in the embodiment 1;
FIG. 10 shows the elastic restoring force (F) of the compression spring during the compression deformation stroke of the compression springN) And the first magnetic attraction end and the second magnetic attraction end attract each other (F)t) A graph of (a);
fig. 11 is a graph of the elastic restoring force of the compression spring and the resultant force of the mutual attraction force of the first magnetic attraction end and the second magnetic attraction end during the compression deformation stroke of the compression spring.
Detailed Description
To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.
The present invention will now be further described with reference to the accompanying drawings and detailed description.
Referring to fig. 1-3, as the preferred embodiment of the present invention, a circuit breaker is provided, including base 1 and contact system 2 installed on base 1, operating device 3, tripping half shaft 4 and magnetic trip 5, which is conventional, contact system 2 includes moving contact and static contact, the movement track of the moving contact relative to the static contact realizes the on/off of the circuit breaker, operating device 3 is linked to contact system 2, when the moving contact is repelled, the latch mechanism is unlocked (tripped) or the handle is manually pulled, the circuit breaker is quickly completed and switched on by operating device 3 linked to contact system 2.
For convenience of description, the x direction in fig. 1 is defined as a length direction of the circuit breaker, the y direction is defined as a width direction of the circuit breaker, and the z direction is defined as a height direction of the circuit breaker.
In this embodiment, the latch mechanism of the circuit breaker is implemented by the hook-shaped trip catch 31 and the trip half shaft 4, the trip catch 31 is lapped in a lapping groove of the trip half shaft 4, and when the trip half shaft 4 rotates, the trip catch 31 falls off from the lapping groove, and the operating mechanism 3 and the contact system 2 are linked.
The magnetic trip 5 is a device for driving the trip half shaft 4 to rotate, and referring to fig. 4 to 5 in conjunction with fig. 1, the magnetic trip 5 is arranged in the height direction of the circuit breaker, and the magnetic trip 5 includes a trip plate 51 (as a trip member), a guide rod 52, a pressure spring 53, a support 54, an armature 55, and a yoke 56. The supporting member 54 is fixedly connected to the base 1, the supporting member 54 is provided with a guide hole 541, the guide rod 52 penetrates through the guide hole 541, so that the guide rod 52 is guided by the supporting member 54, and the supporting member 54 is of a U-shaped sheet structure, so that two coaxial guide holes 541 can be arranged to improve the guiding and limiting effects on the guide rod 52. The compression spring 53 is sleeved on the guide rod 52, the armature 55 is fixedly connected on the guide rod 52, the unlocking plate 51 is sleeved on the guide rod 52 and is buckled and pressed on the compression spring 53 through the screw locking piece, so that one end of the compression spring 53 is abutted against the unlocking plate 51, and the other end of the compression spring is abutted against the supporting piece 54. Yoke 56 and armature 55 are relative setting up from top to bottom in the circuit breaker direction of height, and conductor 21 passes yoke 56 and compresses tightly yoke 56 and fix on base 1, and specifically, referring to fig. 3, be equipped with the mounting groove 11 that opening width roughly matches conductor 21 thickness on base 1, have carrying platform 12 in mounting groove 11 one side shaping, when this conductor 21 impresses mounting groove 11, compress tightly yoke 56 with the trend and fix on carrying platform 12 of base 1. In this embodiment, because the yoke 56 and the armature 55 are arranged in the height direction of the circuit breaker in an up-down opposite manner, the yoke 56 can be pressed and fixed on the base 1 by the installation cooperation of the conductor 21 and the base 1, and the yoke and the base do not need to be fixed by rivets like the prior art, so that the number of parts is reduced, and the cost is saved.
When a large current is passed through the conductor 21, due to the electromagnetic induction phenomenon, a magnetic flux is generated in the armature 55, the yoke 56 and the air gap therebetween, the magnetic lines of force thereof are closed curves around the conductor 21, and an electromagnetic attraction force is generated between the armature 55 and the yoke 56. Because the magnetic yoke 56 is fixed on the base 1, the armature 55 moves towards the magnetic yoke 56 (as a first movement stroke of the armature 55) under the action of electromagnetic attraction and compresses the compression spring 53 to generate elastic reset force, the unlocking plate 51 is driven by the armature 55 and a screw locking piece for buckling the armature 55 to stir the tripping half shaft 4 to rotate, so that the locking mechanism is unlocked, and the circuit breaker further completes tripping and breaking functions, cuts off fault current and protects the safety of circuits and equipment. When the current in the conductor 21 disappears, the compression spring 53 drives the armature 55 back to the initial position (as a second movement stroke of the armature 55) by its elastic restoring force in a direction away from the yoke 56.
The magnetic release of this embodiment is portable from top to bottom, is different from the swing of conventional among the prior art and hits formula magnetic release, and on the one hand make full use of's circuit breaker's height dimension, on the other hand more do benefit to the installation, and whole release only support 54 and yoke 56 form fixed connection with base 1, and installation can be accomplished through simple cover setting and the screw lock connection to all the other components, practices thrift the installation process.
In the present embodiment, a permanent magnet accelerating mechanism is further provided, as shown in fig. 6, a first permanent magnet 61 (as a first magnetic attraction end) is fixedly connected to the unlocking plate 51, so that the first permanent magnet 61 can move along with the movement of the armature 55. A second permanent magnet 62 and a third permanent magnet 63 (which are used as a second magnetic attraction end together) are fixedly connected to the supporting member 54, the second permanent magnet 62 and the third permanent magnet 63 are equidistantly located on two sides of the first permanent magnet, and two sides of the first permanent magnet 61 and the second permanent magnet 62 and the third permanent magnet 63 on the two sides of the first permanent magnet are arranged in a polarity-different manner. Referring to fig. 7-9, when the armature 55 moves toward the yoke 56, the unlocking plate 51 is driven to compress the compression spring 53, the first permanent magnet 61 fixed on the unlocking plate 51 follows the deformation stroke of the compression spring 53, and the second permanent magnet 62 and the third permanent magnet 63 attract the first permanent magnet 61 at the same time, so as to apply a force opposite to the reset force of the compression spring 53 to the armature 53, and help the armature 55 overcome the elastic reset force generated by the compression spring 53 in the compression process; as shown in fig. 7, in the initial stage of the deformation stroke of the compression spring 53, the distances of the three permanent magnets are relatively long, and the permanent magnetic attraction force F of the second permanent magnet 62 and the third permanent magnet 63 to the first permanent magnet 61 is relatively large1、F2The armature 55 stays at the initial position under the supporting action of the compression spring 53, so that the anti-vibration requirement of the circuit breaker is met; as shown in fig. 8, after the current passes through the conductor 21, the armature 55 moves downwards for a stroke, and in the middle stage of the deformation stroke of the compression spring 53, as the first permanent magnet 61 approaches the second permanent magnet 62 and the third permanent magnet 63, the permanent magnetic attraction force F1、F2Greatly increased, the resultant force F of which in the direction of movement of the armature 553The action of the elastic reset force of the pressure spring 53 can be approximately counteracted, the armature 55 can complete the motion process under a smaller current, and the breaker completes the breaking. As shown in fig. 9, at the later stage of the deformation stroke of the compression spring 53, the first permanent magnet 61 is inserted between the second permanent magnet 62 and the third permanent magnet 63, and the permanent magnetic attraction force F1、F2Gradually decreases, the elastic restoring force counteracting effect of the corresponding counter-pressure spring 53 gradually decreases, further, in the present embodiment, in the later stage of the deformation stroke of the counter-pressure spring 53, the first permanent magnet 61 is finally inserted into the center positions of the second permanent magnet 62 and the third permanent magnet 63, and the permanent magnetic attraction force F is1、F2Are cancelled out to maximize the elastic restoring force of the compression spring 53, helping to return the armature 55 to its original position after the conductor current has disappeared.
Fig. 10 shows the elastic restoring force F of the compression spring 53NAnd the first magnetic attraction end and the second magnetic attraction end attract each other FtFig. 11 shows the resultant force curve of the two. In the initial stage to the middle stage of the deformation of the compression spring 53, the resultant force of the two is increased from small to large to help the armature 55 move downward, and in the middle stage to the later stage of the deformation of the compression spring 53, the first permanent magnet 61 is inserted between the second permanent magnet 62 and the third permanent magnet 63, and the resultant force of the two is decreased from large to small, so that the elastic restoring force of the compression spring 53 is maximized.
The distance between the second permanent magnet 62 and the first permanent magnet 61 and the distance between the third permanent magnet 63 and the first permanent magnet 61 can be set to be adjustable, for example, the first permanent magnet 61 is set to be pressed and fixed by a set screw, when the position needs to be adjusted, the set screw is loosened to adjust the position of the first permanent magnet 61, except the distance between the second permanent magnet 62 (the third permanent magnet 63) and the first permanent magnet 61 in the height direction, the distance between the second permanent magnet 62 and the third permanent magnet 63 can be adjusted, the effect of adjusting the distance between the second permanent magnet 62 and the first permanent magnet 61 and the distance between the third permanent magnet 63 and the first permanent magnet 61 can be achieved, and the design requirements of different tripping currents can be met by adjusting and matching with the strokes of the compression spring 53 and the armature 55.
In this embodiment, the first permanent magnet 61 follows the deformation stroke of the compression spring 53, and the second permanent magnet 62 and the third permanent magnet 63 are fixedly disposed, in other embodiments, the second permanent magnet 62 and the third permanent magnet 63 may follow the deformation stroke of the compression spring 53, and the first permanent magnet 61 is fixedly disposed, as long as the two magnetic attraction ends can move relatively to generate a mutual magnetic force action, so as to superimpose and interfere the elastic restoring force of the compression spring 53.
In the present embodiment, the first permanent magnet 61, the second permanent magnet 62 and the third permanent magnet 63 have the same shape and specification for easy manufacture and installation.
Although the present embodiment is described by taking an example of a magnetic release using a compression spring as an elastic return member, it is obvious that the permanent magnet accelerating mechanism in the present embodiment can also be applied to a case where the elastic return member is a tension spring, for example, the unlocking plate 51 in the present embodiment is changed to be fixedly connected to the circuit breaker base, the supporting member 54 is changed not to be fixed to the circuit breaker base, and the compression spring 53 is changed to be a tension spring with both ends hooked on the unlocking plate 51 and the supporting member 54.
Of course, in addition to the movable magnetic release provided in this embodiment, the permanent magnet acceleration mechanism may also be applied to a swing type magnetic release, in which the magnetic yoke attracts the armature to swing, so as to strike the latch mechanism to unlock, and the armature is reset under the action of the torsion spring. According to the movement of the armature, the torsion spring generates a deformation stroke, one of the first magnetic suction end and the second magnetic suction end follows up the deformation stroke of the torsion spring, and the other magnetic suction end is fixedly arranged and generates mutual suction force according to the relative movement of the two magnetic suction ends.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. Magnetic release for the response passes through the electric current of conductor and drives the latched device unblock of circuit breaker, including armature and elasticity piece that resets, armature has the realization the motion stroke of latched device unblock, elasticity resets and is right through its deformation stroke armature applys reset force, its characterized in that: still including being located middle first permanent magnet and equidistant ground be located the second permanent magnet and the third permanent magnet of first permanent magnet both sides, the both sides of first permanent magnet are the different setting of polarity rather than the second permanent magnet and the third permanent magnet of both sides, first permanent magnet is as first magnetism and inhales the end, second permanent magnet and third permanent magnet constitute the second magnetism and inhale the end, first magnetism inhale any of end and second magnetism inhale the end follow-up in the deformation stroke of elasticity piece that resets, another relative by fixed setting, thereby in the deformation stroke of elasticity piece that resets, borrow by the mutual magnetic force effect of first magnetism end and second magnetism inhale the end is used for interfering its power that resets stack.
2. The magnetic release of claim 1, wherein: the superposition intervention is: through the relative motion of the first magnetic attraction end and the second magnetic attraction end, the mutual magnetic force of the first magnetic attraction end and the second magnetic attraction end acts on the elastic reset piece in the initial stage, the middle stage and the later stage of the deformation stroke, and the force is a reverse force which is changed from small to large and then from large to small.
3. The magnetic release of claim 2, wherein: the second permanent magnet and the third permanent magnet attract the first permanent magnet to approach at the same time in the initial stage and the middle stage of the deformation stroke, so that a reverse force from small to large is applied to the elastic resetting piece, and the first permanent magnet is inserted between the second permanent magnet and the third permanent magnet in the middle stage and the later stage of the deformation stroke, so that a reverse force from large to small is applied to the elastic resetting piece.
4. The magnetic release of claim 3, wherein: and the first permanent magnet is finally inserted into the central positions of the second permanent magnet and the third permanent magnet so that the attractive forces of the second permanent magnet and the third permanent magnet to the first permanent magnet are mutually offset.
5. The magnetic release of claim 4, wherein: the first permanent magnet, the second permanent magnet and the third permanent magnet are sheet-shaped structures with the same specification.
6. A magnetic release according to claim 1 or 2, wherein: the motion stroke of the armature is linear movement, and the elastic reset piece is a pull spring or a compression spring.
7. A magnetic release according to claim 1 or 2, wherein: the motion stroke of the armature is swinging, and the elastic reset piece is a torsion spring.
8. The magnetic release of claim 6, wherein: the magnetic release also comprises an unlocking piece, a guide rod and a supporting piece, the supporting piece is fixedly arranged, the support part is provided with a guide hole, the guide rod penetrates through the guide hole, the armature is fixedly connected with the guide rod, the elastic reset piece is a compression spring which is sleeved on the guide rod, the unlocking piece is sleeved on the guide rod and buckled on the compression spring, one end of the compression spring is abutted against the unlocking piece, the other end of the compression spring is abutted against the supporting piece, the first permanent magnet is fixedly connected on the unlocking piece, the second permanent magnet and the third permanent magnet are fixedly connected on the supporting piece, when the armature moves, the unlocking piece is driven to unlock the locking mechanism and compress the compression spring to enable the compression spring to generate the deformation stroke, therefore, the first magnetic suction end fixedly connected to the unlocking piece is enabled to follow the deformation stroke of the elastic resetting piece.
9. The magnetic release of claim 1, wherein: the distance between the second permanent magnet and the first permanent magnet is adjustable.
10. The utility model provides a circuit breaker, includes latched device and magnetic trip, its characterized in that: the magnetic release is as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121225167.XU CN214848458U (en) | 2021-06-02 | 2021-06-02 | Magnetic release and circuit breaker with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121225167.XU CN214848458U (en) | 2021-06-02 | 2021-06-02 | Magnetic release and circuit breaker with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214848458U true CN214848458U (en) | 2021-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121225167.XU Active CN214848458U (en) | 2021-06-02 | 2021-06-02 | Magnetic release and circuit breaker with same |
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| Country | Link |
|---|---|
| CN (1) | CN214848458U (en) |
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2021
- 2021-06-02 CN CN202121225167.XU patent/CN214848458U/en active Active
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