CN211971429U - Disc type permanent magnet brake for elevator - Google Patents
Disc type permanent magnet brake for elevator Download PDFInfo
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- CN211971429U CN211971429U CN201821811290.8U CN201821811290U CN211971429U CN 211971429 U CN211971429 U CN 211971429U CN 201821811290 U CN201821811290 U CN 201821811290U CN 211971429 U CN211971429 U CN 211971429U
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- permanent magnet
- brake
- magnetic field
- elevator
- electromagnet
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Abstract
The utility model provides an elevator disc permanent magnet brake, which comprises a plurality of groups of mutually independent brake components, wherein each group of brake components comprises a first permanent magnet, a second permanent magnet and an electromagnet; the second permanent magnet in each group of brake assemblies is fixedly connected with a tractor shaft and rotates along with the tractor shaft; the electromagnet in each group of the brake assemblies is arranged between the first permanent magnet and the second permanent magnet; and a magnetism isolating body for isolating a magnetic field is arranged between every two adjacent groups of brake assemblies, and the elevator disc type permanent magnet brake adopts magnetic braking, so that various mechanical faults existing in mechanical braking can be effectively avoided.
Description
Technical Field
The utility model relates to an elevator braking field, concretely relates to elevator disc permanent magnet brake.
Background
The elevator brake is a key component for ensuring normal and safe operation of the elevator, and when the elevator car stops operating, the brake is braked by an internal contracting brake to keep the elevator car at a flat floor or a required position.
The traditional elevator brake comprises a disc brake, a block brake and a butterfly brake, the working principle of the traditional elevator brake is basically the same, namely when an electromagnet is electrified, the brake shoe and a brake wheel are separated (brake release) by overcoming the elastic force of a spring through electromagnetic force, and when the electromagnet is not electrified, the brake shoe is attached to the brake wheel under the action of the spring to realize braking (brake contracting).
Since the above conventional elevator brake relies on a spring to push a shoe to reset the brake, there are problems including: the failure of the spring elasticity can cause insufficient or lost braking force, the abrasion of a brake shoe causes insufficient braking force, the blockage of mechanical movement affects the braking, and the like.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model provides an elevator disc permanent magnet brake, mechanical parts such as this elevator disc permanent magnet brake remove spring, brake shoe can obviously reduce the fault rate of stopper, the security of reinforcing stopper.
The utility model adopts the following technical scheme:
the disc type permanent magnet brake of the elevator is characterized by comprising a plurality of groups of mutually independent brake assemblies, wherein each group of brake assemblies comprises a first permanent magnet, a second permanent magnet and an electromagnet;
the second permanent magnet in each group of brake assemblies is fixedly connected with a tractor shaft and rotates along with the tractor shaft; the first permanent magnet in each group of the brake assemblies provides a first magnetic field, the second permanent magnet provides a second magnetic field, and the first magnetic field attracts the second magnetic field to provide braking force for stopping the second permanent magnet from rotating;
each set of the brake assemblies having the electromagnet disposed between the first permanent magnet and the second permanent magnet, the electromagnet selectively providing a third magnetic field that controls the effect of the first magnetic field on the second magnetic field to control the braking force;
and a magnetic isolation body for isolating a magnetic field is arranged between two adjacent groups of brake assemblies.
Preferably, the electromagnet comprises an iron core and a coil, and there is a substantially linear correspondence between the current through the coil and the magnitude of the braking force.
Preferably, the third magnetic field selectively cooperates with the first and second magnetic fields to selectively increase the braking force.
Preferably, a magnetic circuit is included, the magnetic circuit comprising a ferromagnetic material for propagating the first, second and third magnetic fields therethrough.
Preferably, a rotor fixed to the machine shaft and extending in a radial direction with respect to the machine shaft is included, and a plurality of the second permanent magnets parallel to each other are fixed to an outer circumference of the rotor.
Preferably, a fixing frame surrounding the rotor is included, and the first permanent magnet, the electromagnet and the isolation magnet are all fixed to the fixing frame.
Preferably, the polarities of the first permanent magnet and the second permanent magnet are opposite, that is, the N (or S) pole of the first permanent magnet corresponds to the S (or N) pole of the second permanent magnet.
Preferably, each second permanent magnet in each group of the braking assemblies is separated into a plurality of second permanent magnets, and the second permanent magnets are uniformly distributed around the periphery of the rotor.
Preferably, each first permanent magnet in each group of brake assemblies is separated into a plurality of first permanent magnets, the first permanent magnets are uniformly distributed around the periphery of the rotor, and the separated number of the first permanent magnets corresponds to that of the second permanent magnets.
Preferably, the magnetism-isolating body comprises a substance or a component having a function of isolating or shielding a magnetic field.
Compared with the prior art, the beneficial effects of the utility model are that: the braking force is provided by the attraction force between the first permanent magnet and the second permanent magnet, and the permanent magnets can provide stable magnetic force, so that the problem of spring failure is avoided, and the brake shoe-like material contact is avoided, and the abrasion is avoided; only the change of a magnetic field exists in the brake releasing and contracting processes, the mechanical action in the traditional brake does not exist, the mechanical blocking fault cannot occur, and the reaction speed is higher; a plurality of groups of mutually independent brake assemblies are adopted, if one group fails, other groups can still complete braking, and safety and stability are enhanced.
Drawings
Fig. 1 is the structure schematic diagram of the elevator disc permanent magnet brake of the embodiment of the present invention.
Fig. 2 is a schematic view of a magnetic field in a contracting brake state corresponding to fig. 1.
Fig. 3 is a schematic view of the magnetic field in the released state corresponding to fig. 1.
Fig. 4 is a schematic structural view of a rotor and a second permanent magnet according to a first embodiment of the present invention.
Description of reference numerals:
a brake assembly: q
A first permanent magnet: 1
A second permanent magnet: 2
An electromagnet: 3, rotor: 4
The shaft of the traction machine: 5 bond: 51
Fixing a frame: 6
A magnetism isolating body: 7.
Detailed Description
In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.
Please refer to fig. 1, fig. 2, fig. 3, and fig. 4. The utility model relates to an elevator disc permanent magnetism stopper of embodiment. As shown by the dotted lines in fig. 1, the disc type permanent magnet brake for an elevator includes three sets of brake assemblies Q, each set of brake assemblies Q including a first permanent magnet 1, a second permanent magnet 2, and an electromagnet 3. The three groups of brake assemblies Q work independently, namely, each group of brake assemblies Q can independently realize the braking of the rotor 4, one brake assembly Q breaks down, and the work of other brake assemblies Q cannot be influenced.
The rotor 4 is sleeved on the tractor shaft 5, and the rotor 4 and the tractor shaft 5 are fixedly connected through a key 51 to realize synchronous rotation. The rotor 4 extends radially with respect to the machine shaft 5, where it is surrounded by a mounting frame 6.
As shown in fig. 1, the rotor 4 and the second permanent magnets 2 are fixedly connected in a combined manner, the rotor 4 is made of a non-permanent magnetic material, the three second permanent magnets 2 are fixedly arranged on the periphery of the rotor 4, and the three second permanent magnets 2 are parallel to each other. The first permanent magnet 1, the electromagnet 3 and the isolation magnet 7 are all fixed on the fixing frame 6, and the fixing frame 6 is made of ferromagnetic materials so as to facilitate the magnetic induction lines to pass through and form a magnetic loop.
In every group brake assembly Q, the polarity of first permanent magnet 1 and second permanent magnet 2 is all reverse setting, the north pole of first permanent magnet 1 corresponds the south pole of second permanent magnet 2 promptly, or the south pole of first permanent magnet 1 corresponds the north pole of second permanent magnet 2, its effect is the mutual magnetic attraction that realizes between first permanent magnet 1 and the second permanent magnet 2, first permanent magnet 1 can produce first magnetic field promptly, second permanent magnet 2 can produce the second magnetic field, attract the effect of playing the braking through the magnetic force between first magnetic field and the second magnetic field.
In every group's brake assembly Q, electromagnet 3 all sets up between first permanent magnet 1 and second permanent magnet 2, and electromagnet 3 is fixed in mount 6 on, and electromagnet 3 encircles rotor 4 by iron core and coil and forms. By applying currents with different directions and magnitudes to the electromagnet 3, the electromagnet 3 can generate a third magnetic field with different magnetic field directions and magnetic force magnitudes, and by the fact that the currents of the coils and the magnitude of the braking force have approximate linear corresponding relation, the third magnetic field is selectively provided, the influence of the first magnetic field on the second magnetic field can be controlled, and finally the braking force is controlled.
The specific control mode of the third magnetic field is as shown in fig. 2 and 3, when no current flows in the electromagnet 3, the N pole of the first permanent magnet 1 and the S pole of the second permanent magnet 2 attract each other, and the magnetic induction line passes through the fixed frame 6 and the electromagnet 3 to form a magnetic loop. The rotor 4 is braked under the action of the magnetic attraction of the first permanent magnet 1 to the second permanent magnet 2, and then the brake of the tractor shaft 5 is realized. When current is selectively conducted in the coils of the electromagnet 3, the third magnetic field generated by the electromagnet 3 can magnetically shift the first magnetic field and the second magnetic field, so that the magnetic fields mutually attracted between the first magnetic field and the second magnetic field are weakened or even reduced to zero, the corresponding braking force is gradually weakened or even eliminated, and the rotor 4 is changed from the braked state to the non-braked state.
Further, the third magnetic field can selectively cooperate with the first magnetic field and the second magnetic field to selectively increase the braking force. For example, when the braking force generated by the magnetic attraction between the first magnetic field and the second magnetic field is insufficient, the third magnetic field may be caused to generate an auxiliary magnetic field capable of enhancing the magnetic attraction between the first magnetic field and the second magnetic field by changing the direction and magnitude of the third magnetic field.
As shown in fig. 4, the second permanent magnets 2 in each set of braking assembly Q can be separated into a plurality of independent bodies, and the separated bodies can be uniformly distributed around the periphery of the rotor 4. At this time, corresponding to the arrangement form of the second permanent magnets 2, the first permanent magnets 1 in each group of braking assemblies Q can also be separated into a plurality of independent individuals uniformly distributed around the periphery of the rotor 4, and the separated number corresponds to the number of the second permanent magnets 2.
In order to ensure that the magnetic fields between two adjacent groups of braking assemblies Q cannot influence each other, a magnetism isolating body 7 is arranged between two adjacent groups of braking assemblies Q, the magnetism isolating body 7 is used for isolating the magnetic fields, and the magnetism isolating body 7 can be a substance or an assembly with the function of isolating the magnetic fields or a substance or an assembly with the function of shielding the magnetic fields. If the magnetism isolating body 7 is used for isolating the magnetic field in a shielding manner, the magnetism isolating body 7 can also be designed in a mode of wrapping each braking component Q in the magnetism isolating body.
Compared with the prior art, the braking force of the elevator disc type permanent magnet brake is provided by the attraction force between the first permanent magnet 1 and the second permanent magnet 2 in each group of braking components Q, and the permanent magnets can provide stable magnetic force, so that the problem of spring failure is avoided, and the elevator disc type permanent magnet brake does not have the contact of materials similar to brake shoes and cannot cause abrasion. In addition, only the change of a magnetic field exists in the brake releasing and contracting processes, the mechanical action in the traditional brake does not exist, the mechanical blocking fault cannot occur, and the reaction speed is higher. In addition, because three groups of mutually independent brake components Q are adopted, if one group fails, other groups can still complete braking, and the safety and the stability of the operation of the brake are enhanced.
The present invention has been described in relation to the above embodiments, which are only examples for implementing the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. On the contrary, all changes and modifications which do not depart from the spirit and scope of the present invention are deemed to fall within the scope of the present invention.
Claims (10)
1. The disc type permanent magnet brake of the elevator is characterized by comprising a plurality of groups of mutually independent brake assemblies, wherein each group of brake assemblies comprises a first permanent magnet, a second permanent magnet and an electromagnet;
the second permanent magnet in each group of brake assemblies is fixedly connected with a tractor shaft and rotates along with the tractor shaft;
the first permanent magnet in each group of the brake assemblies provides a first magnetic field, the second permanent magnet provides a second magnetic field, and the first magnetic field attracts the second magnetic field to provide braking force for stopping the second permanent magnet from rotating;
each set of the brake assemblies having the electromagnet disposed between the first permanent magnet and the second permanent magnet, the electromagnet selectively providing a third magnetic field that controls the effect of the first magnetic field on the second magnetic field to control the braking force;
and a magnetic isolation body for isolating a magnetic field is arranged between two adjacent groups of brake assemblies.
2. The elevator disc permanent magnet brake of claim 1, wherein the electromagnet comprises an iron core and a coil, and wherein there is a substantially linear correspondence between the current through the coil and the magnitude of the braking force.
3. The elevator disc permanent magnet brake of claim 1, wherein the third magnetic field selectively cooperates with the first and second magnetic fields to selectively increase the braking force.
4. The elevator disc permanent magnet brake of claim 1, comprising a magnetic circuit comprising a ferromagnetic material for propagating the first, second, and third magnetic fields therethrough.
5. An elevator disc permanent magnet brake according to claim 1, comprising a rotor fixed to and extending radially with respect to the machine shaft, and a plurality of the second permanent magnets are fixed to an outer periphery of the rotor in parallel with each other.
6. The elevator disc permanent magnet brake of claim 5, comprising a mounting bracket surrounding the rotor, and the first permanent magnet, the electromagnet, and the spacer magnet are all secured to the mounting bracket.
7. The elevator disc permanent magnet brake according to claim 1, wherein the first permanent magnet and the second permanent magnet are arranged with their polarities reversed, i.e., the N or S pole of the first permanent magnet corresponds to the S or N pole of the second permanent magnet.
8. The elevator disc permanent magnet brake of claim 5 wherein each of the second permanent magnets in each set of brake assemblies is separated into a plurality of second permanent magnets and circumferentially and evenly distributed around the rotor periphery.
9. The elevator disc permanent magnet brake of claim 8, wherein each of the first permanent magnets in each set of the brake assemblies is separated into a number of pieces and each piece is uniformly distributed around the periphery of the rotor, and the number of the separated pieces corresponds to the number of the second permanent magnets.
10. The elevator disc permanent magnet brake of claim 5, wherein the bucking magnet comprises a substance or component having the function of bucking or shielding a magnetic field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821811290.8U CN211971429U (en) | 2018-11-05 | 2018-11-05 | Disc type permanent magnet brake for elevator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821811290.8U CN211971429U (en) | 2018-11-05 | 2018-11-05 | Disc type permanent magnet brake for elevator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211971429U true CN211971429U (en) | 2020-11-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821811290.8U Active CN211971429U (en) | 2018-11-05 | 2018-11-05 | Disc type permanent magnet brake for elevator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211971429U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109179139A (en) * | 2018-11-05 | 2019-01-11 | 苏州市职业大学 | Elevator disk permanent magnet brake |
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2018
- 2018-11-05 CN CN201821811290.8U patent/CN211971429U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109179139A (en) * | 2018-11-05 | 2019-01-11 | 苏州市职业大学 | Elevator disk permanent magnet brake |
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