An electromagnetic brake with a release handle

Abstract

This utility model discloses an electromagnetic brake with a release handle, relating to the field of 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 the cover plate and stator 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 armature presses the rotor against the cover plate. A manual release mechanism, driven by the armature, is also provided on the stator. When the electromagnetic coil is de-energized, the manual release mechanism can separate the armature from the rotor. By providing a manual release mechanism driven by the armature on the stator, the manual release mechanism does not function during normal operation of the brake. When the system experiences a power outage and requires maintenance, and the brake needs to be released, the armature can be separated from the rotor by operating the manual release mechanism for subsequent operations.

Description

Technical Field

[0001] This utility model relates to the field of brake technology, and more specifically, to an electromagnetic brake with a release handle. 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 stator contains an embedded spring and electromagnetic coil. The free end of the spring is connected to the armature, which can slide between the rotor and stator. In use, the stator is mounted on the motor, and the rotor is 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 needs maintenance due to a power outage and the brake needs to be released, some brakes do not have a manual release function, making it more troublesome to release the brake when the electromagnetic coil is de-energized. Utility Model Content

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

[0006] The objective of this utility model is achieved through the following technical solution: An electromagnetic brake with a release handle 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 armature presses the rotor against the cover plate. The stator is also provided with a manual release mechanism that is kinetically connected to the armature. When the electromagnetic coil is de-energized, the manual release mechanism can separate the armature from the rotor.

[0007] Furthermore, in this utility model, the aforementioned manual release mechanism is disposed on the side wall of the stator opposite to the armature.

[0008] Furthermore, in this utility model, the aforementioned manual release mechanism includes a handle rotatably disposed on the side wall of the stator opposite to the armature, and a second spring and a pull rod both disposed on the handle. The free end of the second spring is connected to the stator; the pull rod passes through the stator and is connected to the armature; rotating the handle can separate the armature from the rotor.

[0009] Furthermore, in this utility model, the handle is provided with an elongated hole, and the end of the pull rod away from the armature passes through the stator and the elongated hole in sequence; a limiting member is provided at the end of the pull rod away from the armature, the handle is located between the limiting member and the stator, and the distance from the limiting member to the stator is greater than the thickness of the handle; the position of the pull rod in the elongated hole will change during the swinging of the handle.

[0010] Furthermore, in this utility model, the stator is provided with a through hole, and the tie rod passes through the through hole.

[0011] Furthermore, in this invention, in its natural state, the second spring causes the handle to adhere to the side wall of the stator that is opposite to the armature.

[0012] The beneficial effects of this utility model are: This utility model provides an electromagnetic brake with a release handle. By setting a manual release mechanism on the stator that is connected to the armature drive, the manual release mechanism does not function when the brake is working normally. When the system encounters a power outage and needs maintenance, and it is necessary to release the brake, the armature can be separated from the rotor by operating the manual release mechanism to facilitate subsequent operations. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model; Figure 2 for Figure 1 The right view; Figure 3 for Figure 2 Sectional view of section AA; Figure 4 This is a schematic diagram of the handle that separates the armature from the rotor in an embodiment of the present invention.

[0014] In the diagram: 101-Cover plate; 201-Rotor; 301-Armature; 401-Stator; 501-Screw; 601-First spring; 701-Electromagnetic coil; 801-Handle; 802-Second spring; 803-Pull rod; 804-Elongated hole; 805-Limiting component. 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 Figures 1-4 This utility model provides a technical solution: An electromagnetic brake with a release handle includes a cover plate 101, a rotor 201, an armature 301, and a stator 401 stacked sequentially. The cover plate 101 and the stator 401 are connected by screws 501. The distance between the cover plate 101 and the stator 401 is greater than the sum of the thicknesses of the rotor 201 and the armature 301. The armature 301 and the stator 401 are connected by a first spring 601. An electromagnetic coil 701 is disposed inside the stator 401. When the electromagnetic coil 701 is energized, the armature 301 will experience a force from the electromagnetic coil 701. The magnetic attraction force causes the armature 301 to overcome the elastic force of the first spring 601 and move towards the stator 401 until the armature 301 separates from the rotor 201. At this time, the rotor 201 can rotate synchronously with the output shaft of the motor. When the electromagnetic coil 701 is de-energized, the armature 301 presses the rotor 201 tightly onto the cover plate 101. The stator 401 is also equipped with a manual release mechanism that is connected to the armature 301. When the electromagnetic coil 701 is de-energized, the manual release mechanism can separate the armature 301 from the rotor 201.

[0017] Preferably, in this embodiment, the manual release mechanism is installed on the side wall of the stator 401 opposite to the armature 301.

[0018] Specifically, from Figure 3 or Figure 4 From the perspective of this embodiment, the manual release mechanism includes a handle 801 rotatably mounted on the right side wall of the stator 401, and a second spring 802 and a pull rod 803 both mounted on the handle 801. The free end of the second spring 802 is connected to the stator 401; the pull rod 803 passes through the stator 401 and is connected to the armature 301; rotating the handle 801 can separate the armature 301 from the rotor 201.

[0019] Preferably, in order to ensure that the handle 801 can both drive the pull rod 803 to move during rotation so that the armature 301 can separate from the rotor 201 when the electromagnetic coil 701 is de-energized, and that the manual release mechanism does not affect the normal operation of the brake during normal operation, in this embodiment, the handle 801 is provided with an elongated hole 804. The end of the pull rod 803 away from the armature 301 passes through the stator 401 and the elongated hole 804 in sequence. A limiting member 805 (in this embodiment, the limiting member 805 is a nut, which is threadedly connected to the pull rod 803) is installed at the end of the pull rod 803 away from the armature 301. The handle 801 is located between the limiting member 805 and the stator 401, and the distance from the limiting member 805 to the stator 401 is greater than the thickness of the handle 801. Furthermore, the length direction of the elongated hole 804 should be such that the position of the pull rod 803 within the elongated hole 804 changes during the swinging of the handle 801.

[0020] To facilitate the installation of the tie rod 803, a through hole (not shown in the figure) is provided on the stator 401 in this embodiment, and the tie rod 803 passes through the through hole.

[0021] from Figure 3 or Figure 4 From the perspective of the figure, in order to facilitate the installation of the first spring 601, a countersunk hole (not shown in the figure) is provided on the left side wall of the stator 401 in this embodiment, and the first spring 601 is installed in the countersunk hole. In order to facilitate the installation of the second spring 802, a countersunk hole (not shown in the figure) is provided on the right side wall of the stator 401 in this embodiment, and the second spring 802 is installed in the countersunk hole.

[0022] like Figures 1-3 As shown, in order to make the overall structure of the brake more compact during normal operation, in this embodiment, the second spring 802 causes the handle 801 to adhere to the side wall of the stator 401 that is opposite to the armature 301 in the natural state.

[0023] Working principle: from Figure 3From the perspective of the device, during use, the stator 401 is mounted on the motor, and the rotor 201 is fixedly connected to the output shaft of the motor that needs to be braked. When the electromagnetic coil 701 is energized, the armature 301 will be attracted by the magnetic force from the electromagnetic coil 701. This magnetic force will cause the armature 301 to move to the right against the elastic force of the first spring 601 until the armature 301 separates from the rotor 201. At this time, the rotor 201 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 701 is de-energized. After the electromagnetic coil 701 is de-energized, the armature 301 moves to the left under the elastic force of the first spring 601 until the armature 301 presses the rotor 201 tightly onto the cover plate 101. At this time, the rotor 201 cannot rotate around its own central axis, and the output shaft of the motor is thus braked. When this brake is working normally, the manual release mechanism does not work, and the handle 801 is attached to the right side wall of the stator 401 under the action of the second spring 802.

[0024] When the system experiences a power outage and requires maintenance, and the brake needs to be released, handle 801 can be turned clockwise by a certain angle. During this clockwise rotation, handle 801 comes into contact with the limiting member 805 and continues to rotate clockwise, causing pull rod 803 to move to the right. This movement of pull rod 803 to the right causes armature 301 to overcome the spring force of the first spring 601 and move to the right until armature 301 separates from rotor 201. After armature 301 separates from rotor 201, a shim can be placed between handle 801 and stator 401 to keep handle 801 in place. Figure 4 This state ensures that the armature 301 and the rotor 201 remain separated, facilitating subsequent operations.

[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. An electromagnetic brake with a release handle, comprising a cover plate (101), a rotor (201), an armature (301), and a stator (401) stacked sequentially, wherein the cover plate (101) and the stator (401) are connected by screws (501), the distance between the cover plate (101) and the stator (401) is greater than the sum of the thicknesses of the rotor (201) and the armature (301), the armature (301) and the stator (401) are connected by a first spring (601), and an electromagnetic coil (701) is disposed inside the stator (401). When the electromagnetic coil (701) is de-energized, the armature (301) presses the rotor (201) against the cover plate (101); characterized in that: The stator (401) is also provided with a manual release mechanism that is connected to the armature (301) for transmission. When the electromagnetic coil (701) is de-energized, the manual release mechanism can separate the armature (301) from the rotor (201).

2. An electromagnetic brake with a release handle according to claim 1, characterized in that: The manual release mechanism is located on the side wall of the stator (401) opposite to the armature (301).

3. An electromagnetic brake with a release handle according to claim 2, characterized in that: The manual release mechanism includes a handle (801) rotatably mounted on the side wall of the stator (401) opposite to the armature (301), and a second spring (802) and a pull rod (803) both mounted on the handle (801). The free end of the second spring (802) is connected to the stator (401). The pull rod (803) passes through the stator (401) and is connected to the armature (301). Rotating the handle (801) can separate the armature (301) from the rotor (201).

4. An electromagnetic brake with a release handle according to claim 3, characterized in that: The handle (801) has an elongated hole (804). The end of the pull rod (803) away from the armature (301) passes through the stator (401) and the elongated hole (804) in sequence. A limiting member (805) is provided at the end of the pull rod (803) away from the armature (301). The handle (801) is located between the limiting member (805) and the stator (401), and the distance from the limiting member (805) to the stator (401) is greater than the thickness of the handle (801). The position of the pull rod (803) in the elongated hole (804) will change during the swinging process of the handle (801).

5. An electromagnetic brake with a release handle according to claim 3, characterized in that: The stator (401) has a through hole, and the pull rod (803) passes through the through hole.

6. An electromagnetic brake with a release handle according to claim 3, characterized in that: In its natural state, the second spring (802) causes the handle (801) to adhere to the side wall of the stator (401) opposite to the armature (301).

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