A brake with manual release mechanism

Abstract

This utility model discloses a brake with a manual release mechanism, relating to the field of electromagnetic brake technology. The brake includes a cover plate, a rotor, an armature, and a stator stacked sequentially. The cover plate and stator are connected by screws, and the distance between them is greater than the sum of the thicknesses of the rotor and the armature. The armature and stator are connected by a first spring. An electromagnetic coil is installed inside the stator. When the electromagnetic coil is de-energized, the first spring causes the armature to abut against the rotor; when the electromagnetic coil is energized, magnetic attraction separates the armature from the rotor. The stator also has a release mechanism driven by the armature and a push mechanism driven by the release mechanism. When the electromagnetic coil is de-energized, the push mechanism and the release mechanism work together to separate the armature from the rotor. The presence of the push mechanism allows the brake to be kept in the released state without continuous force, making it easier to operate.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic brake technology, and more specifically, to a brake with a manual release structure. 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, rotor, armature, and stator stacked sequentially. The cover plate and stator are connected by screws, and the distance between them is fixed, greater than the sum of the thicknesses of the rotor and armature. A spring and electromagnetic coil are embedded within the stator. The free end of the spring is connected to the armature, allowing the armature to slide between the rotor and stator. In use, the cover plate is mounted on the motor end cover, 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, the electromagnetic coil is de-energized. After de-energization, the armature moves towards the rotor under the spring force until it presses against the rotor. At this point, the rotor cannot rotate around its own axis due to friction, thus braking the motor's output shaft.

[0004] However, when the system needs to be repaired due to a power outage and the brake needs to be released, some brakes with a release handle and manual release function are difficult to operate. At the same time, continuous force needs to be applied to the release handle to keep the armature in the released position (at which point the armature is separated from the rotor), which is quite troublesome to operate. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a brake with a manual release structure.

[0006] The objective of this utility model is achieved through the following technical solution: A brake with a manual release mechanism 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 de-energized, the first spring causes the armature to abut against the rotor. When the electromagnetic coil is energized, the magnetic attraction causes the armature to separate from the rotor. The stator is also provided with a release mechanism drivenly connected to the armature and a push mechanism drivenly connected to the release mechanism. When the electromagnetic coil is de-energized, the push mechanism and the release mechanism cooperate to separate the armature from the rotor.

[0007] Furthermore, in this utility model, the release mechanism includes a pull rod passing through the stator and a handle connected to the stator via a second spring. The central axis of the pull rod is parallel to the central axis of the rotor. One end of the pull rod is fixedly connected to the armature, and the other end is provided with a limit cap. The handle is located between the stator and the limit cap. When the brake is working normally, the release mechanism does not interfere with the reciprocating movement of the armature between the stator and the rotor. The pushing mechanism is drivenly connected to the handle.

[0008] Furthermore, in this utility model, the aforementioned driving mechanism includes a rotating shaft rotatably mounted on the stator and a cam fixedly mounted on the rotating shaft. When the rotating shaft rotates, the cam can move the handle away from or closer to the stator, so that the armature can reciprocate between the stator and the rotor.

[0009] Furthermore, in this utility model, a rocker handle is also fixedly provided on the aforementioned rotating shaft.

[0010] Furthermore, in this utility model, a limiting through hole is also provided on the aforementioned crank handle.

[0011] Furthermore, in this invention, when the gap between the handle and the stator is at its maximum, the armature and the rotor are completely separated.

[0012] The beneficial effects of this utility model are: This utility model provides a brake with a manual release structure. By setting a release mechanism and a push mechanism on the stator, the release mechanism and the push mechanism do not function when the brake is working normally. When the system encounters a power outage and needs maintenance, and the brake needs to be released, the release mechanism can be controlled by operating the push mechanism, and the release mechanism will then separate the armature from the rotor. Furthermore, due to the existence of the push mechanism, the brake can be kept in the released state without continuous force, making it easier to operate. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the handle mounting structure according to an embodiment of the present utility model; Figure 3 for Figure 2 Sectional view of section AA; Figure 4 for Figure 3 A magnified view of a section at point A in the middle; Figure 5 This is a schematic diagram of the cam in different positions according to an embodiment 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; 204-Limit cap; 301-Shaft; 302-Cam; 401-Crank handle; 501-Limit through hole. 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] Please see Figure 1-5 This utility model provides a technical solution: A brake with a manual release mechanism 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 (not shown in the figure). 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 provided inside the stator 104. When the electromagnetic coil 106 is de-energized, the first spring 105 causes the armature 103 to abut against the rotor 102. When the electromagnetic coil 106 is energized, the magnetic attraction causes the armature 103 to separate from the rotor 102. The stator 104 is also provided with a release mechanism that is throttledly connected to the armature 103, and a push mechanism that is throttledly connected to the release mechanism. When the electromagnetic coil 106 is de-energized, the push mechanism and the release mechanism cooperate to separate the armature 103 from the rotor 102.

[0017] When in use, the cover plate 101 is fixedly installed on the motor, and the rotor 102 is fixedly connected to the output shaft of the motor that needs to be braked. After the brake is installed, the central axis of the cover plate 101, the central axis of the rotor 102, the central axis of the armature 103 and the central axis of the stator 104 are all collinear with the central axis of the output shaft of the motor that needs to be braked.

[0018] Specifically, in this embodiment, the release mechanism includes a pull rod 201 passing through the stator 104 and a handle 203 connected to the stator 104 via a second spring 202. The central axis of the pull rod 201 is parallel to the central axis of the rotor 102. One end of the pull rod 201 is fixedly connected to the armature 103, and the other end is provided with a limit cap 204. The handle 203 is located between the stator 104 and the limit cap 204. The dimensions of each component in the release mechanism should satisfy the following: when the brake is working normally, the release mechanism does not interfere with the reciprocating movement of the armature 103 between the stator 104 and the rotor 102. The pushing mechanism is connected to the handle 203 in a transmission manner. When the release mechanism is not working, the second spring 202 causes the handle 203 to adhere to the side wall of the stator 104 away from the armature 103. Figure 3 or Figure 4 From the perspective of the first spring 105, when the electromagnetic coil 106 is de-energized, the position of the limit cap 204 on the pull rod 201 cannot interfere with the first spring 105 to make the armature 103 abut against the rotor 102.

[0019] Specifically, in this embodiment, the driving mechanism includes a rotating shaft 301 rotatably mounted on the stator 104 and a cam 302 fixedly mounted on the rotating shaft 301. When the rotating shaft 301 rotates, the cam 302 can move the handle 203 away from or closer to the stator 104, so that the armature 103 reciprocates between the stator 104 and the rotor 102.

[0020] like Figure 1 As shown, in order to facilitate the control of the rotation of the rotating shaft 301, a rocker arm 401 is also fixedly installed on the rotating shaft 301 in this embodiment.

[0021] like Figure 1 As shown, in order to prevent the crank handle 401 from swinging arbitrarily around the central axis of the rotating shaft 301 when the pushing mechanism is not in operation, thus affecting the normal operation of the brake, a limiting through hole 501 is also provided on the crank handle 401 in this embodiment. In this way, when the pushing mechanism is not in operation, a cylindrical pin or screw can be inserted into the hole, and the other end of the cylindrical pin or screw is connected to the motor end cover to prevent accidental operation.

[0022] like Figure 5 As shown, Figure 5 The left figure in the figure is a structural diagram when neither the release mechanism nor the push mechanism is working. At this time, the second spring 202 causes the handle 203 to adhere to the side wall of the stator 104 away from the armature 103, and the cam 302 does not contact the handle 203. Figure 5The right figure shows the position of cam 302 when the gap between handle 203 and stator 104 is at its maximum. At this time, armature 103 is completely separated from stator 104, and handle 203 is always in contact with cam 302 under the elastic force of second spring 202. The clamping force applied by handle 203 to cam 302 keeps cam 302 in place. Figure 5 The state shown in the middle right image allows the brake to be kept in the released state without continuous force, making it easier to operate.

[0023] Working principle: from Figure 1 From the perspective of the motor, during use, the cover plate 101 is mounted on the motor, and the rotor 102 is fixedly connected to the output shaft of the motor that needs to be braked. When the electromagnetic coil 106 is energized, the armature 103 will be attracted by the magnetic force from the electromagnetic coil 106. This magnetic force will cause the armature 103 to move to the left against the elastic force of the first spring 105 until the armature 103 separates from the rotor 102. At this time, the rotor 102 can rotate synchronously with the output shaft of the motor. When it is necessary to brake the output shaft of the motor, the electromagnetic coil 106 is de-energized. After the electromagnetic coil 106 is de-energized, the armature 103 moves to the right under the elastic force of the first spring 105 until the armature 103 abuts against the rotor 102. At this time, the rotor 102 cannot rotate around its own central axis under the action of friction, and the output shaft of the motor is thus braked. When this brake is working normally, the pushing mechanism of the release mechanism does not work, and the handle 203 is attached to the left side wall of the stator 104 under the action of the second spring 202.

[0024] When the system experiences a power outage and requires maintenance, necessitating the release of the brake, the crank handle 401 can be operated to rotate the shaft 301. During this rotation, the cam 302 rotates synchronously. The cam 302 continues to rotate after contacting the handle 203, during which time the handle 203 moves to the left. As the handle 203 moves to the left, it contacts the limit cap 204 and continues to move a certain distance to the left. During this process, the pull rod 201 moves synchronously to the left under the pull of the limit cap 204 and the handle 203, thus separating the armature 103 from the rotor 102 and releasing the brake. The cam 302 stops rotating when it reaches the brake-released position. The push mechanism installed on the stator 104 allows the brake to remain in the released state without continuous force, making operation easier.

[0025] 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. A brake with a manual release mechanism, 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 de-energized, the first spring causes the armature to abut against the rotor; when the electromagnetic coil is energized, magnetic attraction causes the armature to separate from the rotor; characterized in that: The stator is also provided with a release mechanism that is driven to the armature, and a push mechanism that is driven to the release mechanism. When the electromagnetic coil is de-energized, the push mechanism and the release mechanism cooperate to separate the armature from the rotor.

2. The brake with a manual release structure according to claim 1, characterized in that: The release mechanism includes a pull rod passing through the stator and a handle connected to the stator via a second spring. The central axis of the pull rod is parallel to the central axis of the rotor. One end of the pull rod is fixedly connected to the armature, and the other end is provided with a limit cap. The handle is located between the stator and the limit cap. When the brake is working normally, the release mechanism does not interfere with the reciprocating movement of the armature between the stator and the rotor. The pushing mechanism is drivenly connected to the handle.

3. A brake with a manual release structure according to claim 2, characterized in that: The driving mechanism includes a rotating shaft rotatably mounted on the stator and a cam fixedly mounted on the rotating shaft. When the rotating shaft rotates, the cam can move the handle away from or towards the stator, so that the armature can reciprocate between the stator and the rotor.

4. A brake with a manual release structure according to claim 3, characterized in that: A crank handle is also fixedly installed on the rotating shaft.

5. A brake with a manual release structure according to claim 4, characterized in that: The crank handle is also provided with a limit hole.

6. A brake with a manual release structure according to claim 3, characterized in that: When the gap between the handle and the stator is at its maximum, the armature is completely separated from the rotor.

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