Rotating shaft electromagnetic brake for motor

Abstract

The utility model belongs to the technical field of motor brakes, and discloses a rotating shaft electromagnetic brake for a motor, which comprises an electromagnet assembly and a hub assembly, the hub assembly comprises a hub, a cover plate, an elastic sheet and a brake disc, the hub is in interference fit with the rotating shaft of the motor, and the cover plate, the elastic sheet and the brake disc are all sleeved outside the rotating shaft of the motor. One side of the hub is riveted with the fixed part of the elastic piece through a rivet, and one side of the brake disc is riveted with the elastic part of the elastic piece through a rivet; the electromagnet assembly and the hub assembly which are coaxially matched are connected through the elastic piece, multi-spring multi-point supporting is replaced, and therefore the structure is more stable during movement, the situation that the service life of parts is shortened due to poor movement friction is effectively reduced, and the service life of the brake is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of motor brakes, and particularly relates to a shaft electromagnetic brake for a motor. Background Art

[0002] A brake mainly consists of a brake frame, a braking member, a control device, etc. Some brakes are also equipped with an automatic adjustment device for the clearance of the braking member. In order to reduce the braking torque and structural size, the brake is usually installed on the high-speed shaft of the equipment, but for large equipment with high safety requirements (such as mine hoists, elevators, etc.), it should be installed on the low-speed shaft close to the working part of the equipment.

[0003] The structure of the existing motor brake is relatively complex. It is necessary to set multiple spring clutch components between the excitation coil and the braking structure to adsorb and reset the brake disc and the excitation coil. With such a structure, the assembly process is relatively complex, and the adjustment of the spring force is relatively troublesome. It is very difficult to adjust the balance between the springs, resulting in movement friction between the structures, which leads to a short service life and easy damage of the device. Moreover, the process and a large number of components result in a relatively high cost of manufacturing the brake, and it is not easy to repair and replace components. Therefore, it is necessary to design a brake with a simple and reasonable structure, convenient production, and economy to meet the market demand. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a shaft electromagnetic brake for a motor, aiming to solve the above technical problems existing in the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A shaft electromagnetic brake for a motor includes an electromagnet assembly and a hub assembly. The hub assembly includes a hub, a cover plate, a spring sheet, and a brake disc. The hub is in interference fit with the motor shaft. The cover plate, the spring sheet, and the brake disc are all sleeved outside the motor shaft. One side of the hub is riveted to the fixed part of the spring sheet through a rivet, and one side of the brake disc is riveted to the elastic part of the spring sheet through the rivet;

[0007] The electromagnet assembly is fixedly installed on the motor end cover. The electromagnet assembly is provided with a power supply connector. The electromagnet assembly is electrically connected to the power supply through the power supply connector, and the electromagnet assembly fixes the brake disc by electromagnetic attraction.

[0008] In a preferred embodiment of the utility model, the electromagnet assembly includes a yoke iron housing and a coil sub-assembly. The yoke iron housing is in a ring structure. The coil sub-assembly is fixedly installed inside the yoke iron housing. The yoke iron housing and the motor end cover are tightly connected through bolts.

[0009] In a preferred embodiment of the present utility model, the coil subassembly includes an exciting coil and a coil bracket. The exciting coil is wound around the surface of the coil bracket, and the coil bracket is located within the annular space of the yoke iron housing, and its surface is riveted to the inner ring end face of the yoke iron housing.

[0010] In a preferred embodiment of the present utility model, the power supply connector includes a socket, a protective cover, and two insertion pieces. The two insertion pieces are inserted side by side into the socket. The protective cover is fixedly connected to the socket by bolts and presses the two insertion pieces. The insertion pieces are provided with raised welding posts, and the two ends of the exciting coil are respectively welded to the two welding posts.

[0011] In a preferred embodiment of the present utility model, the socket is integrally formed with the coil bracket and is arranged parallel to the central axis of the coil bracket.

[0012] In a preferred embodiment of the present utility model, the side of the cover plate away from the motor end cover is connected by riveting through the rivets.

[0013] The beneficial effects of the present utility model are as follows:

[0014] 1. The present utility model connects the electromagnet assembly and the hub assembly in coaxial cooperation through elastic pieces, replacing multi-spring multi-point support, so that the structure is more stable during movement, effectively reducing the situation that the service life of parts is reduced due to poor movement friction, and effectively improving the service life of the brake;

[0015] 2. The structure of the present utility model is simple and easy to assemble, making the brake convenient for maintenance and replacement. It is durable while having a low manufacturing cost and is worthy of being vigorously promoted in the industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0017] Figure 2 is a three-dimensional split structural schematic diagram of the electromagnet assembly and the hub assembly;

[0018] Figure 3 is a split sectional structural schematic diagram of the electromagnet assembly and the hub assembly;

[0019] Figure 4 is a three-dimensional exploded structural schematic diagram of the present utility model.

[0020] Reference numerals; wherein: 100, electromagnetic solenoid assembly; 101, yoke iron housing; 102, coil sub-assembly; 10201, exciting coil; 10202, coil bracket; 103, power supply connector; 10301, socket; 10302, blade; 10303, protective cover; 200, hub assembly; 201, brake disc; 202, shrapnel; 203, rivet; 204, hub; 205, cover plate. Detailed implementation mode

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the present invention in combination with the accompanying drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings. It should be noted here that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation to the present invention.

[0022] Embodiment:

[0023] As Figures 1-4 shown, this embodiment provides an electromagnetic brake for a motor shaft, including an electromagnetic solenoid assembly 100 and a hub assembly 200. The hub assembly 200 includes a hub 204, a cover plate 205, a shrapnel 202, and a brake disc 201. The hub 204 is in interference fit with the motor shaft. The cover plate 205, the shrapnel 202, and the brake disc 201 are all sleeved outside the motor shaft. One side of the hub 204 is riveted to the fixing part of the shrapnel 202 through a rivet 203, and one side of the brake disc 201 is riveted to the elastic part of the shrapnel 202 through a rivet 203;

[0024] The electromagnetic solenoid assembly 100 is fixedly installed on the motor end cover. The electromagnetic solenoid assembly 100 is provided with a power supply connector 103. The electromagnetic solenoid assembly 100 is electrically connected to the power supply through the power supply connector 103, and the electromagnetic solenoid assembly 100 fixes by electromagnetically attracting the brake disc 201.

[0025] In a preferred embodiment of the present invention, further, the electromagnetic solenoid assembly 100 includes a yoke iron housing 101 and a coil sub-assembly 102. The yoke iron housing 101 has an annular structure. The coil sub-assembly 102 is fixedly installed inside the yoke iron housing 101. The yoke iron housing 101 is fixedly connected to the motor end cover through bolts.

[0026] In a preferred embodiment of the present invention, further, the coil sub-assembly 102 includes an exciting coil 10201 and a coil bracket 10202. The exciting coil is wound on the surface of the coil bracket 10202. The coil bracket 10202 is located in the annular space of the yoke iron housing 101, and its surface is riveted to the inner ring end face of the yoke iron housing 101.

[0027] In a preferred embodiment of the present utility model, further, the power supply connector 103 includes a socket 10301, a protective cover 10303 and two insertion pieces 10302. The two insertion pieces 10302 are inserted side by side into the socket 10301. The protective cover 10303 is fixedly connected to the socket 10301 by bolts and presses the two insertion pieces 10302. The insertion pieces 10302 are provided with raised welding posts, and both ends of the excitation coil 10201 are welded to the two welding posts respectively.

[0028] In a preferred embodiment of the present utility model, further, the socket 10301 is integrally formed with the coil bracket 10202 and is arranged parallel to the central axis of the coil bracket 10202.

[0029] In a preferred embodiment of the present utility model, further, one side of the cover plate 205 away from the motor end cover is press riveted by the rivet 203.

[0030] Specifically, since the motor rotor is in a free state when the motor coil is powered off, a relatively small current is applied to the electromagnetic brake coil to lock the motor rotor, which can be applied to various occasions where the motor shaft needs to be able to flexibly switch to self-locking.

[0031] This electromagnetic brake is composed of two parts: a hub assembly 200 and an electromagnet assembly 100. A through hole is provided in the center of the hub assembly 200, and this through hole is in interference fit with the adapted motor shaft. The hub assembly 200 moves with the motor shaft.

[0032] The electromagnet assembly 100 is mainly composed of an excitation coil 10201 and a yoke iron housing 101, and is fixedly installed on the end cover of the motor through the yoke iron housing 101. The hub assembly 200 and the electromagnet assembly 100 on the motor are coaxially arranged in space, and the axial clearance (air gap) between the two is controlled at about 0.5 mm. When the excitation coil 10201 is energized, an electromagnetic force is generated to adsorb the brake disc 201 on the hub assembly 200, and the motor rotor is locked under the frictional force between the brake disc 201 and the yoke iron housing 101.

[0033] In the hub assembly 200, under the action of the elastic piece 202, the brake disc 201 and the hub 204 can be positioned and connected while realizing axial elastic displacement. The implementation scheme is as follows:

[0034] The brake disc 201 and the elastic piece 202 are riveted and fixed together by the rivet 203. Two riveting post points are provided on the back of the hub 204 and are riveted with the elastic piece 202. The elastic piece 202 plays the role of a "soft" bridge. The cover plate 205 is riveted and fixed to the end face of the hub 204 with the same structure to improve the strength of pressing into the motor shaft.

[0035] Electromagnet assembly 100: After winding the coil bobbin with enameled wire, the outer circumference is wrapped with insulating tape to form the coil sub-assembly 102. Two card slots are designed on the coil bobbin to fix the insert 10302. The insert 10302 is designed with upright columns with flanges turned up. The starting end and the ending end of the enameled wire are respectively welded to the upright columns of the insert 10302, and then the protective cover 10303 is buckled on the side to protect the insert 10302, only leaving the terminal interface of the insert 10302; the yoke iron housing 101 is designed as an island-shaped structure, and the coil sub-assembly 102 is inserted into the middle circular groove. The inner ring of the island of the yoke iron housing 101 must be lower than the outer ring to prevent magnetic short circuit from affecting the release response to the brake disc 201. Four riveting points are symmetrically arranged at the mating part of the inner ring of the island and the inner hole of the coil bobbin to fix the coil sub-assembly 102.

[0036] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An electromagnetic brake for the rotating shaft of a motor, characterized in that, It includes an electromagnet assembly (100) and a hub assembly (200). The hub assembly (200) includes a hub (204), a cover plate (205), a shrapnel (202) and a brake disc (201). The hub (204) is in interference fit with the motor rotating shaft. The cover plate (205), the shrapnel (202) and the brake disc (201) are all sleeved outside the motor rotating shaft. One side of the hub (204) is riveted to the fixed part of the shrapnel (202) by a rivet (203). One side of the brake disc (201) is riveted to the elastic part of the shrapnel (202) by the rivet (203). The electromagnet assembly (100) is fixedly installed with the motor end cover. The electromagnet assembly (100) is provided with a power supply connector (103). The electromagnet assembly (100) is electrically connected to the power supply through the power supply connector (103). The electromagnet assembly (100) is fixed by electromagnetically attracting the brake disc (201).

2. The electromagnetic brake for the motor shaft according to claim 1, characterized in that, The electromagnet assembly (100) includes a yoke iron housing (101) and a coil sub-assembly (102). The yoke iron housing (101) is in a ring structure. The coil sub-assembly (102) is fixedly installed inside the yoke iron housing (101). The yoke iron housing (101) is fixedly connected to the motor end cover by bolts.

3. The electromagnetic brake for the rotating shaft of an electric motor according to claim 2, characterized in that, The coil sub-assembly (102) includes an exciting coil (10201) and a coil bracket (10202). The exciting coil is wound around the surface of the coil bracket (10202). The coil bracket (10202) is in the annular space of the yoke iron housing (101), and its surface is riveted to the inner ring end face of the yoke iron housing (101).

4. The electromagnetic brake for the rotating shaft of an electric machine according to claim 3, characterized in that, The power supply connector (103) includes a socket (10301), a protective cover (10303) and two insertion pieces (10302). The two insertion pieces (10302) are inserted side by side into the socket (10301). The protective cover (10303) is fixedly connected to the socket (10301) by bolts and presses the two insertion pieces (10302). The insertion pieces (10302) are provided with upturned welding posts. The two ends of the exciting coil (10201) are respectively welded to the two welding posts.

5. The electromagnetic brake for the rotating shaft of an electric machine according to claim 4, characterized in that, The socket (10301) is integrally formed with the coil bracket (10202) and is arranged parallel to the central axis of the coil bracket (10202).

6. The electromagnetic brake for the rotating shaft of an electric machine according to claim 1, wherein One side of the cover plate (205) away from the motor end cover is connected by press riveting with the rivet (203).

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