CN211871253U - Drum-type permanent-magnet brake for elevator - Google Patents
Drum-type permanent-magnet brake for elevator Download PDFInfo
- Publication number
- CN211871253U CN211871253U CN201821812168.2U CN201821812168U CN211871253U CN 211871253 U CN211871253 U CN 211871253U CN 201821812168 U CN201821812168 U CN 201821812168U CN 211871253 U CN211871253 U CN 211871253U
- Authority
- CN
- China
- Prior art keywords
- permanent magnet
- brake
- magnetic field
- elevator drum
- rotor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Cage And Drive Apparatuses For Elevators (AREA)
Abstract
The utility model provides an elevator drum-type permanent magnet brake, which comprises two 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 electromagnets in each group of brake assemblies are arranged between the first permanent magnet and the second permanent magnet, and the elevator drum 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 drum-type 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 drum 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, a 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 drum-type permanent-magnet brake, mechanical parts such as this elevator drum-type permanent-magnet brake removed spring, brake shoe can obviously reduce the fault rate of stopper, strengthens the security of stopper.
The utility model adopts the following technical scheme:
an elevator drum type permanent magnet brake is characterized by comprising two 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 is provided with the electromagnet which is arranged between the first permanent magnet and the second permanent magnet and selectively provides a third magnetic field, and the third magnetic field controls the influence of the first magnetic field on the second magnetic field so as to control the braking force.
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 the second permanent magnets are fixed to both side surfaces of an edge of the rotor, respectively.
Preferably, a fixing frame surrounding the rotor is included, and the first permanent magnet and the electromagnet are both 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, the second permanent magnet is separated into a plurality of permanent magnets which are uniformly distributed on the periphery of the rotor.
Preferably, the first permanent magnet is separated into a plurality of permanent magnets which are uniformly distributed around the periphery of the rotor, and the separated permanent magnets correspond to the second permanent magnets in number.
Preferably, the polarities of the two second permanent magnets in the two groups of brake assemblies are arranged in the same direction, that is, the N (or S) poles of the two adjacent second permanent magnets correspond to the N (or S) poles.
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; two groups of mutually independent brake assemblies are adopted, if one group fails, the other group can still complete braking, and safety and stability are enhanced.
Drawings
Fig. 1 is the structure of elevator drum permanent magnetism brake of the embodiment of the utility model.
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 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.
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 discloses an elevator drum permanent magnet brake of embodiment, as shown in figure 1, including two sets of brake assembly, every brake assembly of group all includes first permanent magnet 1, second permanent magnet 2 and electromagnet 3. Two sets of brake assemblies work independently each other, and the braking to rotor 4 all can be realized independently to every group brake assembly promptly, and a set of breaks down, can not influence another a set of work.
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 magnet 2 are formed in combination, the rotor 4 is made of a non-permanent magnetic material, and the second permanent magnet 2 is fixedly installed on two sides of the edge of the rotor 4. The first permanent magnet 1 and the electromagnet 3 are fixed on a fixed frame 6, and the fixed 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 braking component, the polarity of first permanent magnet 1 and second permanent magnet 2 all sets up in opposite directions, the north pole of first permanent magnet 1 corresponds the south pole of second permanent magnet 2 promptly, perhaps 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 braking component, 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 passing currents of different directions and magnitudes to the electromagnet 3, the electromagnet 3 will be able to generate a third magnetic field of different magnetic field direction and magnetic force magnitude, and there is an approximate linear correspondence between the current through the coil and the magnitude of the braking force. The selective provision of the third magnetic field enables control of the influence of the first magnetic field on the second magnetic field, and ultimately control of the braking force.
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 brake assemblies can be separated into a plurality of independent bodies, and the separated bodies can be uniformly distributed around two sides of the edge 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 brake assemblies can be separated into a plurality of independent individuals which are uniformly distributed around the periphery of the rotor 4, and the separated number corresponds to the number of the second permanent magnets 2.
Compared with the prior art, the brake force of the drum-type permanent magnet brake of the elevator is provided by the attraction force between the first permanent magnet 1 and the second permanent magnet 2 in each group of brake assemblies, and the permanent magnets can provide stable magnetic force, so that the problem of spring failure is avoided, and the brake shoe-like substance contact is avoided, and the abrasion is avoided. 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 two groups of mutually independent brake assemblies are adopted, if one group fails, the other group can still complete braking, and the running safety and stability 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. An elevator drum type permanent magnet brake is characterized by comprising two 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 is provided with the electromagnet which is arranged between the first permanent magnet and the second permanent magnet and selectively provides a third magnetic field, and the third magnetic field controls the influence of the first magnetic field on the second magnetic field so as to control the braking force.
2. The elevator drum 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 drum 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 drum 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 drum permanent magnet brake according to claim 1, comprising a rotor fixed to and extending radially relative to the machine shaft, and the second permanent magnet is fixed to each side of an edge of the rotor.
6. The elevator drum permanent magnet brake of claim 5, comprising a mounting bracket surrounding the rotor, and wherein the first permanent magnet and the electromagnet are each fixed to the mounting bracket.
7. The elevator drum permanent magnet brake of claim 1, wherein the first permanent magnet is oppositely poled from the second permanent magnet, 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 drum permanent magnet brake of claim 5, wherein the second permanent magnet is separated into a plurality of magnets and evenly distributed around the rotor periphery.
9. The elevator drum permanent magnet brake of claim 8, wherein the first permanent magnet is separated into a number of pieces and uniformly distributed around the periphery of the rotor, and the number of separated pieces corresponds to the number of the second permanent magnets.
10. The elevator drum permanent magnet brake of claim 5, wherein the polarities of the two second permanent magnets in two sets of the brake assemblies are arranged in the same direction, i.e., the N or S poles of two adjacent second permanent magnets correspond to the N or S poles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821812168.2U CN211871253U (en) | 2018-11-05 | 2018-11-05 | Drum-type permanent-magnet brake for elevator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821812168.2U CN211871253U (en) | 2018-11-05 | 2018-11-05 | Drum-type permanent-magnet brake for elevator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211871253U true CN211871253U (en) | 2020-11-06 |
Family
ID=73239939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821812168.2U Active CN211871253U (en) | 2018-11-05 | 2018-11-05 | Drum-type permanent-magnet brake for elevator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211871253U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109205497A (en) * | 2018-11-05 | 2019-01-15 | 苏州市职业大学 | Elevator drum-type permanent magnet brake |
-
2018
- 2018-11-05 CN CN201821812168.2U patent/CN211871253U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109205497A (en) * | 2018-11-05 | 2019-01-15 | 苏州市职业大学 | Elevator drum-type permanent magnet brake |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11056948B1 (en) | Progressive force electro-permanent magnets actuator | |
| US3488536A (en) | Bistable permanent magnet coupling system | |
| HK1138242A1 (en) | An elevator brake assembly, an elevator system and a method of controlling an elevator braking system | |
| JPS5947538A (en) | Solenoid clutch-brake | |
| CN109474090B (en) | Doubly salient permanent magnet motor | |
| CN211871253U (en) | Drum-type permanent-magnet brake for elevator | |
| KR101251056B1 (en) | Drum brake apparatus using a eddy current and magnetic reluctance | |
| CN211971429U (en) | Disc type permanent magnet brake for elevator | |
| CN212076272U (en) | Disc type permanent magnet brake for elevator | |
| CN212086046U (en) | Ring type permanent-magnet brake for elevator | |
| CN212183374U (en) | Elevator ring type outer rotor permanent magnet brake | |
| CN109969149B (en) | Disc brake, control system thereof and vehicle | |
| CN103457430A (en) | Outer rotor permanent magnetic synchronous magnetic resistance type traction driving device | |
| CN110315906B (en) | Magnetic suspension spherical tire | |
| JP2701321B2 (en) | Electromagnetic brake | |
| US3215875A (en) | Dynamoelectric machine | |
| CA3054308A1 (en) | Permanent magnet offset systems and methods | |
| CN212012442U (en) | Non-contact type transmission | |
| US10274102B2 (en) | Valve actuator, valve and method for controlling a valve actuator | |
| CN109205497A (en) | Elevator drum-type permanent magnet brake | |
| CN203504377U (en) | Outer rotor permanent magnetic synchronous magnetic resistance type traction driving device | |
| CN109179139A (en) | Elevator disk permanent magnet brake | |
| CN109217629A (en) | Elevator ring type permanent magnet brake | |
| CN109412384A (en) | Elevator ring type external rotor permanent magnet brake | |
| CN212921002U (en) | Magnetic suspension tire |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |