Electromagnetic brake device

Abstract

The utility model belongs to the technical field of electromagnetic brakes, and discloses an electromagnetic brake device which comprises a rear cover, an annular assembly plate and an annular brake plate, a first through hole is formed in the middle of the rear cover, one side of the rear cover is provided with an opening, an electromagnetic coil is fixedly installed on the inner side of the rear cover, and the annular assembly plate is fixedly installed at the opening of the rear cover. The annular assembly plate is detachably installed in the motor shell, the side, away from the rear cover, of the annular assembly plate is connected with an annular brake plate through an elastic piece, one end of a motor rotating shaft rotationally penetrates through the annular brake plate and a first through hole and then is fixedly provided with fan blades, and a brake plate is fixedly installed on the motor rotating shaft. According to the utility model, the ventilation openings in the annular assembly plate, the heat dissipation holes in the annular brake plate and the heat dissipation fins on the rear cover are matched with the fan blades mounted on the rotating shaft of the motor to form a heat dissipation source, so that the heat dissipation system does not need additional heat dissipation equipment, and the energy consumption and the operation cost are effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electromagnetic brake, especially relates to a kind of electromagnetic brake device. BACKGROUND

[0002] In the field of golf carts (usually refers to electric golf cart or similar electric vehicle), the motor as the core component to drive the vehicle forward, its performance and reliability are directly related to the driving safety and ride experience of the vehicle. The motor of golf cart not only needs to provide enough power to meet the driving needs of the vehicle on different terrains, but also must have good braking performance to ensure safe parking in emergency.

[0003] The Chinese patent with publication number CN220358961U discloses a design of a reduction motor with electromagnetic brake function, although this design has been applied in the fields of machine tool manufacturing, textile machinery, etc., there are still some challenges in the specific application scenario of golf cart. Especially in the working mechanism of electromagnetic brake, the motor of golf cart faces similar problems: when the electromagnetic brake is started, the energization of electromagnetic coil and the contact between brake friction plate and brake disc will generate significant heat. Since golf cart is usually used outdoors and may be continuously driven for a long time or the brake is frequently started, this leads to the electromagnetic brake system being prone to overheating.

[0004] The problem of overheating of electromagnetic brake of golf cart motor mainly comes from two aspects: one is the resistance heat generated by current passing when electromagnetic coil is energized, which is the inherent energy loss of electromagnetic device; the other is the friction heat between friction plate and brake disc during braking, which accumulates with the increase of braking frequency and intensity. Long-term or high-frequency braking operation not only causes the electromagnetic brake system to overheat, but also may accelerate the wear of friction plate, affecting the braking performance and safety, and thus increasing the maintenance cost and vehicle downtime.

[0005] Therefore, for the motor of golf cart, how to effectively manage the heat generated by electromagnetic brake without increasing too much additional cost, prevent overheating phenomenon from occurring, and at the same time prolong the service life of the brake system, is the current problem to be solved. This requires that when designing the motor of golf cart, not only its power output and efficiency should be considered, but also the heat dissipation mechanism of electromagnetic brake system must be specially optimized to adapt to the specific use environment and operating requirements of golf cart.

[0006] Therefore, an electromagnetic brake device is proposed. UTILITY MODEL CONTENT

[0007] The purpose of the utility model is to provide an electromagnetic brake device, thereby solving or at least alleviating one or more of the above problems and other aspects in the prior art.

[0008] In order to achieve the above object, the utility model discloses a main technical scheme includes:

[0009] An electromagnetic brake device, including rear cover, annular assembly plate and annular brake plate, the middle part of rear cover is equipped with first through -hole, one side of rear cover is open arrangement, the inboard fixed mounting of rear cover has the electromagnetic coil, annular assembly plate fixed mounting at the opening of rear cover, annular assembly plate can be detached and installed in the inside of motor casing, the side of annular assembly plate away from rear cover is connected with annular brake plate through elastic element, when the electromagnetic coil is electrified, annular brake plate is adhered on annular assembly plate under the magnetic force of the electromagnetic coil, and one end of motor rotating shaft rotates and penetrates annular brake plate and first through -hole and is fixedly installed with fan blade, and the fixed installation of brake plate on motor rotating shaft, after the electromagnetic coil is powered off, annular brake plate is under the elastic force of elastic element and is in friction contact with brake plate.

[0010] In an electromagnetic brake device according to the utility model, a plurality of ventilation openings are formed in the annular assembly plate.

[0011] In an electromagnetic brake device according to the utility model, a plurality of assembly holes are formed in the annular assembly plate, and one end of a bolt penetrates the assembly hole and is threadedly fixed in the inside of the motor casing.

[0012] In an electromagnetic brake device according to the utility model, a plurality of heat dissipation holes are formed in the annular brake plate.

[0013] In an electromagnetic brake device according to the utility model, the elastic element is a spring, a bushing is formed in the annular assembly plate, a plug rod is fixedly connected to the annular brake plate, one end of the plug rod slidably penetrates the bushing, the spring is sleeved on the plug rod, a sink is formed in the annular assembly plate, the sink is in communication with the bushing, one end of the spring abuts against one end of the sink, and the other end of the spring abuts against one side of the annular brake plate.

[0014] In an electromagnetic brake device according to the utility model, heat dissipation fins are fixedly connected to the side of the rear cover away from the annular assembly plate.

[0015] In an electromagnetic brake device according to the utility model, a limiting protrusion is fixedly connected to the end of the plug rod away from the annular brake plate.

[0016] In an electromagnetic brake device according to the utility model, a heat-conducting silicone grease layer is filled between the electromagnetic coil and the inner wall of the rear cover.

[0017] The utility model at least has following beneficial effect:

[0018] The utility model discloses a ventilation opening on the annular assembly plate, the heat dissipation hole on the annular brake plate, the heat dissipation fin of rear cover and the heat conduction silicone grease layer filled between the electromagnetic coil and the inner wall of rear cover jointly constitute the high -efficient heat dissipation system, and cooperate the heat dissipation source formed by the fan blade installed on the motor shaft, and the heat dissipation system does not need extra heat dissipation equipment, and effectively reduces energy consumption and operating cost.

[0019] The electromagnetic brake device is composed of the rear cover, the annular assembly plate, the annular brake plate, the jack plug on the annular assembly plate, the plug rod fixedly connected on the annular brake plate and the spring sleeved on the plug rod, compact structure, integrally arranged, and convenient for quick assembly and disassembly with the motor.

[0020] The electromagnetic brake device has good waterproof and dustproof functions, and guarantees that the electromagnetic coil can operate long-term and stably. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and serve to explain the application without imposing undue limitation thereon. In the drawings:

[0022] Figure 1 It is the structural schematic diagram of the electromagnetic brake device of the utility model;

[0023] Figure 2 It is the structural schematic diagram of the annular brake plate of the utility model;

[0024] Figure 3 It is the sectional structure schematic diagram of the utility model;

[0025] Figure 4 It is the sectional structure schematic diagram of the utility model when being installed in the motor casing;

[0026] Figure 5 It is the sectional structure schematic diagram of the utility model when being installed in the motor casing; Figure 4

[0027] BRIEF DESCRIPTION OF DRAWINGS

[0028] 1, rear cover;101, heat dissipation fin;11, first through hole;12, electromagnetic coil;2, annular assembly plate;201, ventilation opening;202, assembly hole;203, jack plug;204, groove;3, annular brake plate;301, spring;302, heat dissipation hole;303, plug rod;304, limit protrusion;4, brake plate;5, motor casing;6, motor shaft;7, fan blade. DETAILED DESCRIPTION

[0029] ​The embodiments of the present application will be described in detail below with the accompanying drawings and examples, so that the realization process of how the present application applies technical means to solve technical problems and achieves technical effects can be fully understood and implemented.

[0030] Please refer to Figures 1 to 5 The embodiment of the utility model provides a kind of electromagnetic brake device, including rear cover 1, annular assembly plate 2 and annular brake plate 3, the middle part of rear cover 1 is equipped with first through-hole 11, one side of rear cover 1 is open, the inside of rear cover 1 is fixedly installed with electromagnetic coil 12, annular assembly plate 2 is fixedly installed at the opening of rear cover 1, annular assembly plate 2 is detachably installed in the inside of motor shell 5, annular assembly plate 2 side away from rear cover 1 is connected with annular brake plate 3 by elastic member, when electromagnetic coil 12 is powered, annular brake plate 3 is attracted under the magnetic force generated by electromagnetic coil 12 and is attached on annular assembly plate 2, one end of motor rotating shaft 6 is rotatably penetrated annular brake plate 3 and first through-hole 11 and is fixedly installed with fan blade 7, brake plate 4 is fixedly installed on motor rotating shaft 6, after electromagnetic coil 12 is powered off, annular brake plate 3 is in friction contact with brake plate 4 under the elastic force of elastic member.

[0031] Through the above setting, realize motor rotating shaft 6 quick brake and release, when electromagnetic coil 12 is powered, annular brake plate 3 is attached annular assembly plate 2, motor normal operation;After power off, annular brake plate 3 is in friction contact brake with brake plate 4, compact structure, easy to install, the heat sink formed by fan blade 7 installed on motor rotating shaft 6 can quickly remove the heat generated by the operation of electromagnetic coil 12, without additional cooling equipment, effectively reduce energy consumption and operating cost.

[0032] In the embodiment, a plurality of ventilation openings 201 are formed in the annular assembly plate 2, the ventilation openings 201 can promote air circulation and improve heat dissipation efficiency, so that the heat generated by the friction between the annular brake plate 3 and the brake plate 4 can be moved to the fan blade 7 direction through the ventilation openings 201, when the motor starts, the heat generated by the friction between the annular brake plate 3 and the brake plate 4 can be quickly dissipated to the outside, to ensure the stable operation of the electromagnetic brake device.

[0033] In the embodiment, a plurality of heat dissipation holes 302 are formed in the annular brake plate 3, the heat dissipation holes 302 further enhance the heat dissipation effect, and work together with the ventilation openings 201 of the annular assembly plate 2, to more effectively remove the heat generated during braking, to avoid the device from being damaged due to overheating.

[0034] In this embodiment, the elastic member is a spring 301, the annular assembly plate 2 is provided with a insertion hole 203, the annular brake plate 3 is fixedly connected with an insertion rod 303, one end of the insertion rod 303 is slidably penetrated through the insertion hole 203, the spring 301 is sleeved on the insertion rod 303, the annular assembly plate 2 is provided with a sink groove 204, the sink groove 204 is communicated with the insertion hole 203, one end of the spring 301 abuts against one end of the sink groove 204, the other end of the spring 301 abuts against one side of the annular brake plate 3, by sleeving the spring 301 on the insertion rod 303, cooperating the insertion hole 203 and the sink groove 204, the annular brake plate 3 can move stably, a stable elastic force is provided, and the braking and releasing actions are accurate and reliable.

[0035] In this embodiment, the rear cover 1 is fixedly connected with a heat dissipation fin 101 on the side away from the annular assembly plate 2, the heat dissipation fin 101 of the rear cover 1 increases the heat dissipation area and strengthens the heat dissipation capacity, can quickly dissipate the heat inside the device to the surrounding environment, helps to maintain the electromagnetic brake device to work at a suitable temperature, and improves the overall performance.

[0036] In this embodiment, the insertion rod 303 is fixedly connected with a limiting protrusion 304 on the end away from the annular brake plate 3, the limiting protrusion 304 on the insertion rod 303 can prevent the insertion rod 303 from being pulled out of the insertion hole 203, avoid the spring 301 from being excessively stretched or displaced, ensure the connection between the spring 301, the insertion rod 303 and the annular brake plate 3 to be stable, guarantee the electromagnetic brake device to work normally, and improve the safety and reliability.

[0037] In this embodiment, a heat-conducting silicone grease layer is filled between the electromagnetic coil 12 and the inner wall of the rear cover 1, the heat-conducting silicone grease layer is filled between the electromagnetic coil 12 and the inner wall of the rear cover 1, the heat dissipation effect of the electromagnetic coil 12 is enhanced, the heat generated by the coil can be quickly conducted to the rear cover 1, and then dissipated through the heat dissipation fin 101 and other structures, the influence of heat on the performance of the electromagnetic coil 12 is reduced, and the service life thereof is prolonged.

[0038] In this embodiment, a plurality of assembly holes 202 are formed in the annular assembly plate 2, one end of a bolt is penetrated through the assembly hole 202 and is threadedly fixed in the inside of the motor housing 5, the assembly hole 202 and the bolt are fixed, the installation mode is simple and stable, the installation and dismounting operations on the motor are facilitated, the electromagnetic brake device is convenient for later maintenance and replacement, and the reliability of the connection between the electromagnetic brake device and the motor is ensured.

[0039] Working principle: normal operation state of the motor: when the electromagnetic coil 12 is energized, a strong magnetic force is generated. The annular brake plate 3 moves to the annular assembly plate 2 direction under the attraction of the magnetic force and abuts against the annular assembly plate 2, overcoming the elastic force of the spring 301. At this time, the annular brake plate 3 is separated from the brake plate 4, the motor rotating shaft 6 is not affected by the brake and can rotate freely, and the motor is in the normal operation state.

[0040] Motor brake state: when the electromagnetic coil 12 is powered off, the magnetic force generated by it disappears. At this time, the elastic force of the spring 301 acts, pushing the annular brake plate 3 to move towards the brake plate 4 direction, so that the annular brake plate 3 and the brake plate 4 are in frictional contact. This friction will hinder the rotation of the motor shaft 6, thereby achieving rapid braking of the motor shaft 6, so that the motor stops running quickly.

[0041] Heat dissipation principle

[0042] Fan blade 7 heat dissipation: one end of the motor shaft 6 is provided with a fan blade 7, which rotates when the motor shaft 6 rotates to form a heat dissipation source. In the normal operation process of the motor, the fan blade 7 will drive the air flow, quickly dissipating the heat generated by the electromagnetic coil 12 during operation.

[0043] A plurality of air vents 201 are formed on the annular assembly plate 2, and a plurality of heat dissipation holes 302 are formed on the annular brake plate 3. The air vents 201 can promote the circulation of air in the device, and when the annular brake plate 3 and the brake plate 4 are in friction, heat can be moved to the fan blade 7 direction through the air vents 201. The heat dissipation holes 302 further enhance the circulation of air and the dissipation of heat, and work with the air vents 201 to more effectively dissipate the heat generated during braking, avoiding performance degradation or damage due to overheating of the device. When the motor is started again, the fan blade 7 can quickly dissipate the heat generated by the last braking to the outside.

[0044] The above description shows and describes several preferred embodiments of the present application, but as before, it should be understood that the present application is not limited to the form disclosed herein, and should not be considered as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the present application. The above teachings or related technical or knowledge, and changes and variations made by those skilled in the art without departing from the spirit and scope of the present application, should be within the scope of the appended claims.

Claims

1. An electromagnetic brake device characterized by comprising: Including back cover (1), annular assembly plate (2) and annular brake plate (3), the middle part of the back cover (1) is provided with a first through hole (11), one side of the back cover (1) is provided with an opening, the inner side of the back cover (1) is fixedly installed with an electromagnetic coil (12), the annular assembly plate (2) is fixedly installed at the opening of the back cover (1), the annular assembly plate (2) is detachably installed in the inside of the motor housing (5), the side, away from the back cover (1) of the annular assembly plate (2), is connected with the annular brake plate (3) through an elastic member, when the electromagnetic coil (12) is powered, the annular brake plate (3) is attached to the annular assembly plate (2) under the magnetic force generated by the electromagnetic coil (12), one end of the motor rotating shaft (6) is rotatably penetrated through the annular brake plate (3) and the first through hole (11) and is fixedly installed with a fan blade (7), the motor rotating shaft (6) is fixedly installed with a brake plate (4), after the electromagnetic coil (12) is powered off, the annular brake plate (3) is in frictional contact with the brake plate (4) under the elastic force of the elastic member.

2. An electromagnetic brake device according to claim 1, characterized in that: A plurality of ventilation openings (201) are formed in the annular assembly plate (2).

3. An electromagnetic brake device according to claim 1, wherein: A plurality of assembly holes (202) are formed in the annular assembly plate (2), one end of a bolt is threadedly fixed in the inside of the motor housing (5) after penetrating through the assembly hole (202).

4. An electromagnetic brake device according to claim 2, wherein: A plurality of heat dissipation holes (302) are formed in the annular brake plate (3).

5. An electromagnetic brake device according to claim 1, wherein: The elastic member is a spring (301), a jack (203) is formed in the annular assembly plate (2), a plug rod (303) is fixedly connected to the annular brake plate (3), one end of the plug rod (303) is slidably penetrated through the jack (203), the spring (301) is sleeved on the plug rod (303), a sink (204) is formed in the annular assembly plate (2), the sink (204) is communicated with the jack (203), one end of the spring (301) abuts against one end of the sink (204), the other end of the spring (301) abuts against one side of the annular brake plate (3).

6. An electromagnetic brake device according to claim 1, characterized in that: The side, away from the annular assembly plate (2) of the back cover (1), is fixedly connected with a heat dissipation fin (101).

7. An electromagnetic brake device according to claim 5, wherein: One end of the plug rod (303), away from the annular brake plate (3), is fixedly connected with a limiting protrusion (304).

8. An electromagnetic brake device according to any one of claims 1 to 7, characterised in that: A heat-conducting silicone grease layer is filled between the electromagnetic coil (12) and the inner wall of the back cover (1).

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