Electromagnetic brake with easy maintenance

Abstract

The utility model discloses an electromagnetic brake convenient to maintain relates to electromagnetic brake technical field, and this brake includes the cover plate, rotor, armature and stator that set up in turn, and the cover plate and stator are connected through screw, and the armature is connected through the first spring with the stator, and the stator is provided with the electromagnetic coil, still be provided with release mechanism on the stator, and release mechanism has the brake position and release position, when release mechanism is in the brake position, release mechanism does not influence the normal work of brake, when release mechanism is in the release position, release mechanism makes armature and rotor separate, through setting up and release mechanism of armature transmission connection on the stator, this release mechanism does not interfere with the normal work of brake, when system meets power failure and needs maintenance, and then needs to remove the brake of brake, can through the operation release mechanism and make armature and rotor separate, so as to facilitate the subsequent maintenance, and the diversification design of release piece simultaneously makes the user can select the most suitable structure according to actual conditions.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic brake technology, and more specifically, to an electromagnetic brake that is easy to maintain. Background Technology

[0002] An electromagnetic brake is a connector that transmits torque from the active side to the passive side. It can be freely engaged, disengaged, or braked as needed. It boasts advantages such as compact structure, simple operation, sensitive response, long lifespan, reliable use, and ease of remote control. Electromagnetic brakes are an ideal automated actuator in modern industry, primarily serving to transmit power and control motion in mechanical transmission systems.

[0003] A typical electromagnetic brake for power failure braking generally consists of a cover plate, a rotor (also called a friction plate), an armature, and a stator stacked sequentially. The stator contains an embedded spring and an electromagnetic coil. The free end of the spring is connected to the armature, which can slide between the rotor and the stator. In use, the stator is mounted on the motor, and the rotor is fixedly connected to the output shaft of the motor to be braked. Its working principle is as follows: When the electromagnetic coil is energized, the armature experiences a magnetic attraction from the coil. This attraction causes the armature to overcome the spring force and move towards the stator until it separates from the rotor. At this point, the rotor can rotate synchronously with the motor's output shaft. When braking the motor's output shaft is required, the electromagnetic coil is de-energized. After de-energization, the armature moves towards the rotor under the spring force until it presses the rotor firmly against the cover plate. At this point, the rotor cannot rotate around its own axis due to friction, thus braking the motor's output shaft.

[0004] When the system experiences a power outage and requires maintenance, the brake needs to be manually released. However, some existing brakes do not have a manual release function, making it cumbersome to release the brake when the electromagnetic coil is de-energized, which is inconvenient for maintenance. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an electromagnetic brake that is easy to maintain.

[0006] The objective of this utility model is achieved through the following technical solution: An easily maintainable electromagnetic brake includes a cover plate, a rotor, an armature, and a stator stacked sequentially. The cover plate and the stator are connected by screws, and the distance between the cover plate and the stator is greater than the sum of the thicknesses of the rotor and the armature. The armature and the stator are connected by a first spring. An electromagnetic coil is disposed inside the stator. When the electromagnetic coil is energized, the armature separates from the rotor; when the electromagnetic coil is de-energized, the armature abuts against the rotor. The stator is also provided with a release mechanism that is kinetically connected to the armature. The release mechanism has a braking position and a release position. When the release mechanism is in the braking position, it does not affect the normal operation of the brake; when the release mechanism is in the release position, it separates the armature from the rotor.

[0007] Furthermore, in this utility model, the release mechanism includes a pull rod passing through the stator, a second spring sleeved on the pull rod, a handle, and a release member disposed on the stator. The central axis of the pull rod is parallel to the central axis of the stator. One end of the pull rod is connected to the armature, and the other end extends out of the stator and is slidably connected to the handle. A countersunk hole is formed on the side wall of the stator near the armature. The second spring is located in the countersunk hole. One end of the second spring is connected to the inner bottom wall of the countersunk hole, and the other end is connected to the end of the pull rod near the armature. When the release member puts the handle in the brake position, the distance between the handle and the stator is minimal. When the release member puts the handle in the release position, the distance between the handle and the stator is maximum.

[0008] Furthermore, in this utility model, the release element is a steel ball disposed on the side wall of the stator away from the armature, and the steel ball protrudes from the side wall of the stator away from the armature; a limiting hole with a diameter smaller than the diameter of the steel ball is provided at a corresponding position on the handle; when the part of the steel ball protruding from the stator abuts against the limiting hole, the handle is in the brake position; when the part of the steel ball protruding from the stator does not abut against the limiting hole, the handle is in the release position.

[0009] Furthermore, in this utility model, a limit cap is provided at the end of the pull rod away from the armature, and the handle is located between the limit cap and the stator.

[0010] Furthermore, in this utility model, the release member includes a first wedge block disposed on the side wall of the stator away from the armature and a second wedge block disposed on the side wall of the handle near the stator. The first wedge block is provided with a first inclined surface and a first plane communicating with each other, and the second wedge block is provided with a second inclined surface and a second plane communicating with each other. When the second inclined surface abuts against the first inclined surface, the handle is in the brake position; when the second plane is in complete contact with the first plane, the handle is in the release position.

[0011] Furthermore, in this utility model, a groove is provided on the side wall of the stator away from the armature; the release member includes an adjusting screw threadedly connected to the stator and a cam fixedly disposed at one end of the adjusting screw, the cam being located in the groove; rotation of the cam can put the handle in the brake position or the release position.

[0012] The beneficial effects of this utility model are: This utility model provides an electromagnetic brake that is easy to maintain. By setting a release mechanism on the stator that is connected to the armature drive, the release mechanism does not interfere with the normal operation of the brake. When the system encounters a power outage and needs maintenance, and thus needs to release the brake, the armature can be separated from the rotor by operating the release mechanism to facilitate subsequent maintenance. At the same time, the diversified design of the release component structure allows users to choose the most suitable structure according to the actual situation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model; Figure 2 This is a cross-sectional view of Embodiment 1 of the present utility model; Figure 3 This is a schematic diagram of the structure of Embodiment 2 of this utility model; Figure 4 This is a structural schematic diagram of Embodiment 3 of the present invention.

[0014] In the diagram: 101-Cover plate; 102-Rotor; 103-Armature; 104-Stator; 105-First spring; 106-Electromagnetic coil; 201-Pull rod; 202-Second spring; 203-Handle; 301-Steel ball; 302-Limiting hole; 401-Limiting cap; 501-First wedge block; 502-Second wedge block; 601-Adjusting screw; 602-Cam. Detailed Implementation

[0015] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0016] Example 1 Please see Figure 1 and Figure 2 This embodiment provides a technical solution: An easily maintainable electromagnetic brake includes a cover plate 101, a rotor 102, an armature 103, and a stator 104 stacked sequentially. The cover plate 101 and the stator 104 are connected by screws, and the distance between the cover plate 101 and the stator 104 is greater than the sum of the thicknesses of the rotor 102 and the armature 103. The armature 103 and the stator 104 are connected by a first spring 105. An electromagnetic coil 106 is disposed inside the stator 104. When the electromagnetic coil 106 is energized, the armature 103 overcomes the first spring under the action of magnetic attraction. The spring force of the first spring 105 separates the armature 103 from the rotor 102; when the electromagnetic coil 106 is de-energized, the spring force of the first spring 105 presses the armature 103 against the rotor 102, and the rotor 102 is braked under the action of friction; the stator 104 is also provided with a release mechanism that is connected to the armature 103 in a transmission. The release mechanism has a brake position and a release position. When the release mechanism is in the brake position, the release mechanism does not affect the normal operation of the brake; when the release mechanism is in the release position, the release mechanism separates the armature 103 from the rotor 102.

[0017] Preferred, mainly referring to Figure 2 In this embodiment, the release mechanism includes a pull rod 201 passing through the stator 104, a second spring 202 sleeved on the pull rod 201, a handle 203, and a release member mounted on the stator 104. The central axis of the pull rod 201 is parallel to the central axis of the stator 104. One end of the pull rod 201 is connected to the armature 103, and the other end extends out of the stator 104 and is slidably connected to the handle 203. To facilitate the accommodation of the second spring 202, a countersunk hole (not shown in the figure) is provided on the side wall of the stator 104 near the armature 103. The second spring 202 is located in the countersunk hole, with one end connected to the inner bottom wall of the countersunk hole and the other end connected to the end of the pull rod 201 near the armature 103. When the handle 203 is in the brake position, the release member minimizes the distance between the handle 203 and the stator 104; when the handle 203 is in the release position, the release member maximizes the distance between the handle 203 and the stator 104. The function of the second spring 202 here is to keep the handle 203 in the brake position and the release position.

[0018] Specifically, from Figure 2From this perspective, in this embodiment, the release element is a steel ball 301 installed on the left side wall of the stator 104, and a portion of the steel ball 301 protrudes from the side wall of the stator 104 away from the armature 103. A limiting hole 302 with a diameter smaller than that of the steel ball 301 is provided at a corresponding position on the handle 203. When the portion of the steel ball 301 protruding from the stator 104 abuts against the limiting hole 302, the handle 203 is in the brake position; when the portion of the steel ball 301 protruding from the stator 104 does not abut against the limiting hole 302, the handle 203 is in the release position. In other embodiments of this embodiment, the number of steel balls 301 can be two, three, or more. When the number of steel balls 301 is at least two, the optimal distribution of the steel balls 301 is as follows: the steel balls 301 are arranged in a circular array about the central axis of the stator 104. When the number of steel balls 301 is multiple, the number of limiting holes 302 increases synchronously.

[0019] To prevent the handle 203 from separating from the lever 201, a limiting cap 401 is installed at the end of the lever 201 away from the armature 103 in this embodiment, and the handle 203 is located between the limiting cap 401 and the stator 104. It should be noted that the length of the lever 201 must meet the requirement that when the handle 203 is in the brake position, the lever 201 does not affect the normal operation of the brake.

[0020] Working principle: When the handle 203 is in the brake position, the part of the steel ball 301 protruding from the stator 104 abuts against the limiting hole 302. At this time, the presence of the pull rod 201 will not affect the normal operation of the brake (braking or not braking). When the system experiences a power outage, the electromagnetic coil 106 is not energized, and the armature 103 is tightly pressed against the rotor 102 under the elastic force of the first spring 105. If maintenance is required, the braking of the armature 103 on the rotor 102 can be manually released by operating the release mechanism.

[0021] When manually releasing the armature 103 from the rotor 102, turn the handle 203 to rotate it a certain angle around the central axis of the pull rod 201 until the portion of the steel ball 301 protruding from the stator 104 is completely disengaged from the limiting hole 302. Once the portion of the steel ball 301 protruding from the stator 104 is completely disengaged from the limiting hole 302, the armature 103 is completely separated from the rotor 102, thus releasing the armature 103 from the rotor 102. Figure 2 From the above perspective, during the process, the handle 203 gradually moves to the left under the action of the steel ball 301, and the distance between the handle 203 and the stator 104 gradually increases. The leftward movement of the handle 203 will cause the limit cap 401 and the pull rod 201 to move to the left synchronously, and the armature 103 will also move to the left synchronously under the pulling action of the pull rod 201.

[0022] Example 2 Please see Figure 3 The difference between this embodiment and Embodiment 1 is that the release component in this embodiment includes a first wedge block 501 installed on the side wall of the stator 104 away from the armature 103 and a second wedge block 502 disposed on the side wall of the handle 203 near the stator 104. There are two first wedge blocks 501 and two second wedge blocks 502, and both are symmetrically distributed about the central axis of the stator 104. The first wedge blocks 501 and the second wedge blocks 502 have the same thickness. Any first wedge block 501 is provided with a first inclined surface and a first plane that are interconnected, and any second wedge block 502 is provided with a second inclined surface and a second plane that are interconnected. When the second inclined surface is in complete contact with the first inclined surface, the handle 203 is in the brake position; when the second plane abuts against the first plane, the handle 203 is in the release position.

[0023] Working principle: When the brake is working normally, the second inclined surface is in complete contact with the first inclined surface. At this time, the first plane abuts against the corresponding side of the handle 203, and the second plane abuts against the corresponding end face of the stator 104.

[0024] Manually releasing the armature 103 from the rotor 102 also requires turning the handle 203. As the handle 203 is turned in the corresponding direction, the contact area between the second inclined surface and the first inclined surface gradually decreases. When the second inclined surface is completely separated from the first inclined surface, the second plane immediately contacts the first plane. At this time, the handle 203 is in the released position, and the armature 103 is separated from the rotor 102.

[0025] Example 3 Please see Figure 4 The difference between this embodiment and the previous embodiment is that: in this embodiment, a groove (not shown in the figure) is provided on the side wall of the stator 104 away from the armature 103; the release component includes an adjusting screw 601 threadedly connected to the stator 104 and a cam 602 fixedly disposed at one end of the adjusting screw 601, the cam 602 being located within the groove; rotation of the cam 602 can put the handle 203 into a brake position or a release position. The dimensions of the groove must meet the following requirements: it must be able to accommodate the cam 602 and allow the cam 602 to rotate and move a certain distance within the groove.

[0026] Working principle: In this embodiment, it is not necessary to rotate the handle 203 when manually releasing the armature 103 from the rotor 102. When the brake is working normally, the handle 203 is in the brake position, at which time the distance between the handle 203 and the stator 104 is minimal. When it is necessary to manually release the armature 103 from the rotor 102, use a tool to turn the adjusting screw 601, causing the adjusting screw 601 to rotate a certain angle. During this process, the cam 602 rotates synchronously. During the rotation of the cam 602, a squeezing force is applied to the handle 203, which causes the handle 203 to gradually move away from the stator 104. When the handle 203 moves to its farthest distance, stop turning the adjusting screw 601. At this time, the handle 203 is in the release position, and the distance between the handle 203 and the stator 104 is maximum, and the armature 103 separates from the rotor 102.

[0027] The above description is merely a preferred embodiment of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. An easily maintainable electromagnetic brake, comprising a cover plate, a rotor, an armature, and a stator stacked sequentially, wherein the cover plate and the stator are connected by screws, the distance between the cover plate and the stator is greater than the sum of the thicknesses of the rotor and the armature, the armature and the stator are connected by a first spring, and an electromagnetic coil is disposed within the stator; when the electromagnetic coil is energized, the armature separates from the rotor; when the electromagnetic coil is de-energized, the armature abuts against the rotor; characterized in that: The stator is also provided with a release mechanism that is connected to the armature in a transmission. The release mechanism has a brake position and a release position. When the release mechanism is in the brake position, the release mechanism does not affect the normal operation of the brake. When the release mechanism is in the release position, the release mechanism separates the armature from the rotor.

2. The easily maintainable electromagnetic brake according to claim 1, characterized in that: The release mechanism includes a pull rod passing through the stator, a second spring sleeved on the pull rod, a handle, and a release element disposed on the stator. The central axis of the pull rod is parallel to the central axis of the stator. One end of the pull rod is connected to the armature, and the other end extends out of the stator and is slidably connected to the handle. A countersunk hole is formed on the side wall of the stator near the armature. The second spring is located in the countersunk hole. One end of the second spring is connected to the inner bottom wall of the countersunk hole, and the other end is connected to the end of the pull rod near the armature. When the release element puts the handle in the brake position, the distance between the handle and the stator is minimal. When the release element puts the handle in the release position, the distance between the handle and the stator is maximum.

3. The easily maintainable electromagnetic brake according to claim 2, characterized in that: The release element is a steel ball disposed on the side wall of the stator away from the armature, with a portion of the steel ball protruding from the side wall of the stator away from the armature; a limiting hole with a diameter smaller than that of the steel ball is provided at a corresponding position on the handle; when the portion of the steel ball protruding from the stator abuts against the limiting hole, the handle is in the brake position; when the portion of the steel ball protruding from the stator does not abut against the limiting hole, the handle is in the release position.

4. The easily maintainable electromagnetic brake according to claim 3, characterized in that: A limit cap is provided at the end of the pull rod away from the armature, and the handle is located between the limit cap and the stator.

5. The easily maintainable electromagnetic brake according to claim 2, characterized in that: The release mechanism includes a first wedge block disposed on the side wall of the stator away from the armature and a second wedge block disposed on the side wall of the handle near the stator. The first wedge block has a first inclined surface and a first plane that communicate with each other, and the second wedge block has a second inclined surface and a second plane that communicate with each other. When the second inclined surface is in complete contact with the first inclined surface, the handle is in the brake position; when the second plane abuts against the first plane, the handle is in the release position.

6. The easily maintainable electromagnetic brake according to claim 2, characterized in that: The stator has a groove on its side wall away from the armature; the release component includes an adjusting screw threadedly connected to the stator and a cam fixedly disposed at one end of the adjusting screw, the cam being located in the groove; rotation of the cam can put the handle in the brake position or the release position.

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