Electromagnetic brake capable of realizing automatic reversing of magnetic poles and accelerating and braking

Abstract

The invention relates to the technical field of electromagnetic brakes, in particular to an electromagnetic brake with magnetic poles automatically reversed and accelerated to brake. The electromagnetic brake comprises a brake shell and a brake wheel, the brake wheel is rotationally installed on one side of the brake shell, shaft holes are formed in the axis position of the brake wheel and the axis position of the brake shell, and a rotating shaft of a motor penetrates through the interiors of the shaft holes; meanwhile, an electromagnetic braking assembly is mounted in the brake shell; in addition, the electromagnetic braking assembly installed in the brake shell is provided with an acceleration circuit in a matched mode. According to the electromagnetic brake with the magnetic pole automatic reversing acceleration braking function, the acceleration circuit is matched, the rectifier is additionally arranged in the acceleration circuit, the reversing IGBT transistor is additionally arranged in the rectifier, and at the moment that hoisting equipment is powered off, energy of a brake coil is subjected to peak reversing, polarity switching and serves as residual magnetism for demagnetizing and counteracting materials, so that acceleration braking is achieved.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic brake technology, specifically an electromagnetic brake that automatically reverses magnetic poles for acceleration and braking. Background Technology

[0002] Electromagnetic brakes are brakes that use electromagnetic effects to achieve braking. They are an ideal automated actuator in modern industry, mainly used in mechanical transmission systems to transmit power and control motion. They have advantages such as compact structure, simple operation, sensitive response, long service life, reliable use, and ease of remote control.

[0003] In the lifting industry, the electromagnetic brakes provided in related technologies are used because when the lifting equipment needs to brake during the descent due to the acceleration due to gravity, if the conventional braking method is used, the residual magnetism of the electrical materials will cause the braking of the lifting equipment to be delayed, the descent distance to be longer, and the danger to be greater.

[0004] In view of the problems in the background art mentioned above, the present invention aims to provide an electromagnetic brake with automatic magnetic pole reversal for acceleration and braking. Summary of the Invention

[0005] The purpose of this invention is to provide an electromagnetic brake with automatic magnetic pole reversal for acceleration and braking, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An electromagnetic brake for automatic pole reversal acceleration and braking, the electromagnetic brake comprising:

[0008] The brake housing and the brake wheel are rotatably mounted on one side of the brake housing. A shaft hole is provided at the shaft center of both the brake wheel and the brake housing, and the shaft of the motor passes through the shaft hole.

[0009] Meanwhile, an electromagnetic braking component is installed inside the brake housing, which uses the principle of electromagnetic induction to brake the rotating brake wheel.

[0010] In addition, the electromagnetic braking assembly installed inside the brake housing is equipped with an acceleration circuit that can quickly counteract the residual magnetism of the electromagnetic braking assembly and accelerate braking.

[0011] As a further aspect of the present invention: a wiring harness for transmitting power signals to the electromagnetic braking assembly is connected inside the brake housing.

[0012] As a further aspect of the present invention: the electromagnetic braking assembly includes a friction disc, a movable plate, magnetic poles, and a coil. The coil is spirally wound around the outside of the magnetic poles, and an armature is installed at the upper end of the coil. One end of the movable plate is hinged and movably installed inside the brake housing. A spring is provided in the middle of the movable plate at a position corresponding to the armature. The other end of the movable plate is provided with a friction disc, which is located at the position where the brake wheel extends into the outer wall inside the brake housing.

[0013] As a further aspect of the present invention: the acceleration circuit includes a thermal relay, a first fuse, a second fuse, and a rectifier. The acceleration circuit receives power input through a three-wire circuit. The thermal relay and the first fuse are installed sequentially on the circuit of the motor.

[0014] The second fuse and the rectifier are installed sequentially on the circuit of the electromagnetic braking assembly, and the rectifier is equipped with an IGBT transistor.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] Compared with current electromagnetic brakes, the electromagnetic brake with automatic magnetic pole reversal acceleration and braking has the following advantages:

[0017] By adapting the acceleration circuit and adding a rectifier to the acceleration circuit, and adding a commutating IGBT transistor to the rectifier, the energy peak of the brake coil is reversed and the polarity is switched at the moment the lifting equipment is powered off. This serves as demagnetization, canceling the residual magnetism of the material and achieving accelerated braking. Demagnetization can be achieved within 0.5ms, and the measured braking time is accelerated by 20ms. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention.

[0019] Figure 1 This is a schematic diagram of the structure of an electromagnetic brake for automatic pole reversal acceleration and braking according to an embodiment of the present invention. Figure 1 .

[0020] Figure 2 This is a schematic diagram of the structure of an electromagnetic brake for automatic pole reversal acceleration and braking according to an embodiment of the present invention. Figure 2 .

[0021] Figure 3 This is a front view of an electromagnetic brake for automatic magnetic pole reversal acceleration and braking according to an embodiment of the present invention.

[0022] Figure 4This is a side view of an electromagnetic brake for automatic pole reversal acceleration braking according to an embodiment of the present invention.

[0023] Figure 5 This is a circuit diagram of an electromagnetic brake for automatic magnetic pole reversal acceleration braking according to an embodiment of the present invention.

[0024] In the diagram: 1-Wire harness, 2-Brake housing, 3-Brake wheel, 4-Shaft, 5-Shaft hole, 6-Armature, 7-Coil, 8-Magnetic pole, 9-Friction disc, 10-Motor, 11-Thermal relay, 12-Fuse 1, 13-Fuse 2, 14-Rectifier, 15-IGBT transistor, 16-Spring. Detailed Implementation

[0025] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0026] Example

[0027] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 An electromagnetic brake for automatic pole reversal acceleration braking is provided in this embodiment of the invention. The electromagnetic brake for automatic pole reversal acceleration braking includes:

[0028] The brake housing 2 and the brake wheel 3 are rotatably mounted on one side of the brake housing 2. A shaft hole 5 is provided at the axial position of both the brake wheel 3 and the axial position of the brake housing 2. The shaft 4 of the motor 10 passes through the shaft hole 5.

[0029] Meanwhile, an electromagnetic braking component is installed inside the brake housing 2. The electromagnetic braking component uses the principle of electromagnetic induction to brake the rotating brake wheel 3. The brake housing 2 is connected to a wiring harness 1, which is used to transmit power signals to the electromagnetic braking component. In addition, the electromagnetic braking component installed inside the brake housing 2 is equipped with an acceleration circuit. The acceleration circuit can quickly cancel the residual magnetism of the electromagnetic braking component to achieve accelerated braking. It can demagnetize within 0.5ms, and the measured braking time is reduced by 20ms.

[0030] In an embodiment of the present invention, when the normal motor 10 is powered on and outputs kinetic energy to the rotating shaft 4, pushing the rotating shaft 4 to rotate and output kinetic energy, the rotating shaft 4 will also drive the brake wheel 3 installed on one side of the brake housing 2 to rotate at the same time.

[0031] When it is necessary to brake the rotating shaft 4, the rotating brake wheel 3 can be braked by the electromagnetic braking component installed inside the brake housing 2. When the brake wheel 3 is braked, the rotating shaft 4 installed at the axis of the brake wheel 3 will also be braked. The residual magnetism of the electromagnetic braking component can be quickly canceled by the adapted acceleration circuit to achieve acceleration braking.

[0032] Please see Figure 4 and Figure 5 In one embodiment of the present invention, the electromagnetic braking assembly includes a friction disc 9, a movable plate, a magnetic pole 8, and a coil 7. The coil 7 is spirally wound around the outside of the magnetic pole 8, and an armature 6 is installed at the upper end of the coil 7. One end of the movable plate is hinged and movably installed inside the brake housing 2, and a spring 16 is provided in the middle of the movable plate at a position corresponding to the armature 6. The other end of the movable plate is provided with a friction disc 9, which is located at the position where the brake wheel 3 extends into the outer wall inside the brake housing 2.

[0033] When the electromagnetic braking assembly is de-energized, the friction disc 9 is separated from the outer wall of the brake wheel 3 by the elastic variable generated by the deformation of the spring 16, thereby causing the brake wheel 3 to rotate on the outside of the brake housing 2 along with the rotation of the shaft 4.

[0034] When the electromagnetic braking assembly is energized, the installed magnetic pole 8 generates electromagnetic induction under the action of the energized coil 7, which causes the armature 6 set at the upper end of the magnetic pole 8 to quickly attract the movable plate, thereby causing the middle of the movable plate to approach the armature 6 and fit against the surface of the armature 6. Finally, the friction disc 9 installed at one end of the movable plate squeezes the outer wall of the brake wheel 3, thereby achieving rapid braking of the rotating brake wheel 3. Finally, the rotating shaft 4 installed at the axis of the brake wheel 3 is also rapidly braked.

[0035] Please see Figure 4 In one embodiment of the present invention, the acceleration circuit includes a thermal relay 11, a first fuse 12, a second fuse 13, and a rectifier 14. The acceleration circuit receives power input through a three-wire circuit. The thermal relay 11 and the first fuse 12 are installed sequentially on the circuit of the motor 10. The thermal relay 11 can provide the motor 10 with a specified input quantity and maintain it for a sufficient time, causing a predetermined step change in the controlled quantity in the electrical output circuit. The first fuse 12 is used to automatically disconnect the circuit when the input current to the circuit connected to the motor 10 is too large, thus automatically protecting the motor 10 under load.

[0036] The second fuse 13 and the rectifier 14 are installed sequentially on the circuit of the electromagnetic braking assembly, and the rectifier 14 is adapted to the IGBT transistor 15.

[0037] The function of the second fuse 13 is the same as that of the first fuse 12, both of which are to quickly disconnect the circuit when the current load of the electromagnetic braking component is too large. The addition of IGBT transistor 15 in rectifier 14 reverses the energy peak of the coil 7 wrapped outside the magnetic pole 8 of the electromagnetic braking component at the moment of power failure, switching the polarity to demagnetize and cancel the residual magnetism of the material, thereby accelerating braking. It can achieve demagnetization within 0.5ms, and the actual braking time is accelerated by 20ms.

[0038] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An electromagnetic brake of the magnetic pole automatic commutation accelerating brake type, comprising: The brake housing (2) and the brake wheel (3) are rotatably mounted on one side of the brake housing (2). A shaft hole (5) is provided at the axial position of both the brake wheel (3) and the brake housing (2), and the shaft (4) of the motor (10) passes through the shaft hole (5). The brake wheel (3) is characterized by: An electromagnetic braking assembly is installed inside the brake housing (2) to brake the rotating brake wheel (3) by means of electromagnetic induction. In addition, the electromagnetic braking assembly installed inside the brake housing (2) is equipped with an acceleration circuit that can quickly cancel the residual magnetism of the electromagnetic braking assembly and accelerate the braking.

2. The electromagnetic brake of claim 1, wherein: The brake housing (2) is connected to a wiring harness (1) for transmitting power signals to the electromagnetic braking assembly.

3. The electromagnetic brake of claim 1, wherein: The electromagnetic braking assembly includes a friction disc (9), a movable plate, a magnetic pole (8), and a coil (7). The coil (7) is spirally wound around the outside of the magnetic pole (8), and an armature (6) is installed at the upper end of the coil (7). One end of the movable plate is hinged and movably installed inside the brake housing (2). A spring (16) is provided in the middle of the movable plate at a position corresponding to the armature (6). The other end of the movable plate is provided with a friction disc (9), which is located at the position where the brake wheel (3) extends into the outer wall inside the brake housing (2).

4. The electromagnetic brake of claim 1, wherein: The acceleration circuit includes a thermal relay (11), a first fuse (12), a second fuse (13), and a rectifier (14). The acceleration circuit receives power through a three-wire circuit. The thermal relay (11) and the first fuse (12) are installed sequentially on the circuit of the motor (10). The second fuse (13) and the rectifier (14) are installed sequentially on the circuit of the electromagnetic braking assembly. The rectifier (14) is equipped with an IGBT transistor (15).

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