Novel permanent magnet brake

Abstract

The utility model relates to the technical field of brakes, in particular to a novel permanent magnet brake which comprises a stator and a rotor, the stator comprises a coil panel, a shaft sleeve is arranged in the middle of the coil panel, a coil is sleeved on the outer side face of the shaft sleeve, and a permanent magnet is arranged between the inner bottom face of the shaft sleeve and the inner bottom face of the coil panel. Under the same torque specification, the permanent magnet is arranged between the shaft sleeve and the coil panel, so that the size of the permanent magnet brake in an axial space is reduced, the thickness of the permanent magnet brake is reduced, the requirement of a flat installation space is met, meanwhile, the reverse electromagnetic force required for reducing the permanent magnetic force of the permanent magnet is smaller, and the service life of the permanent magnet brake is prolonged. And therefore, the running power is small, the running calorific value is correspondingly reduced, and the service life, the braking effect and the braking efficiency are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of brakes, in particular to a novel permanent magnet brake. Background Art

[0002] Permanent magnet brake is a new type of braking device. When no power is supplied, the rare earth magnet generates a permanent magnetic force to brake. When power is supplied, the electromagnetic coil generates a reverse electromagnetic force, which together with the elastic force of the armature upper leaf spring offsets the permanent magnetic force, so that the brake is released to achieve separation without residual torque. It has a simple structure, long service life and is easy to install.

[0003] At present, the existing permanent magnet brake places the permanent magnet on its rotor part or between the stator and the rotor, which makes the permanent magnet brake thick and not suitable for flat installation space. In addition, the reverse electromagnetic force required to eliminate the permanent magnetic force of the permanent magnet is large, its power is also large, and its operating temperature is also high. Therefore, the applicant proposes a new type of permanent magnet brake. Utility Model Content

[0004] In order to solve the deficiencies in the prior art, the utility model provides a novel permanent magnet brake.

[0005] The technical solution of the utility model is:

[0006] The utility model provides a novel permanent magnet brake, comprising a stator and a rotor, wherein the stator comprises a coil disk, a shaft sleeve is centrally arranged in the coil disk, a coil is sleeved on the outer surface of the shaft sleeve, and a permanent magnet is arranged between the inner bottom surface of the shaft sleeve and the inner bottom surface of the coil disk;

[0007] The permanent magnet is in the shape of an annular plate and is sleeved on the outer circumference of the bottom surface of the sleeve.

[0008] Furthermore, the rotor comprises a brake disc movably arranged on the open end surface of the coil disc, a plate spring is arranged on the side of the brake disc away from the coil disc, and the brake disc is fixedly connected to the plate spring.

[0009] Furthermore, the leaf spring and the brake disc are threadedly connected via fixing bolts.

[0010] Furthermore, the leaf spring is annular, and is provided with a plurality of fixing holes and fixing bolts along its circumference, and the non-nut end of the fixing bolt is threadedly connected to the brake disc.

[0011] Furthermore, a wire is fixedly connected to one side of the coil disk, and the wire passes through the coil disk and extends into the inside of the coil disk to be connected to the coil.

[0012] The beneficial effects achieved by the utility model are:

[0013] Under the same torque specification, the utility model arranges the permanent magnet between the shaft sleeve and the coil disk, reduces the size of the permanent magnet brake in the axial space, and thus makes the thickness of the permanent magnet brake thinner to meet the needs of flat installation space. At the same time, the reverse electromagnetic force required for the permanent magnetic force of the permanent magnet is smaller, and thus the operating power is small, and the operating heat is correspondingly reduced, thereby ensuring the service life, braking effect and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0015] Figure 2 It is an exploded view of the utility model. DETAILED DESCRIPTION

[0016] To facilitate those skilled in the art to understand the present invention, specific implementations of the present invention are described below with reference to the accompanying drawings.

[0017] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0018] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0019] like Figures 1-2As shown, a new type of permanent magnet brake of the utility model includes a stator and a rotor, the stator includes a coil disk 1, a shaft sleeve 11 is centrally provided in the coil disk 1, a coil 12 is sleeved on the outer surface of the shaft sleeve 11, and a permanent magnet 13 is provided between the inner bottom surface of the shaft sleeve 11 and the inner bottom surface of the coil disk 1; under the same torque specification, the permanent magnet is arranged between the shaft sleeve and the coil disk, which reduces the size of the permanent magnet brake in the axial space, thereby making the thickness of the permanent magnet brake thinner to meet the needs of a flat installation space. At the same time, the strength of the magnetic field will weaken with the increase of distance. Therefore, the farther the distance between the coil and the permanent magnet, the greater the reverse electromagnetic force required for the coil to resist the permanent magnetic force. The current in the coil needs to be increased to increase the reverse electromagnetic force, which will increase the heat generated by the coil, thereby affecting its service life and weakening the braking effect and efficiency. Conversely, the closer the distance between the coil and the permanent magnet, the smaller the reverse electromagnetic force required for the coil to resist the permanent magnetic force, the smaller the current, and the correspondingly reduced heat; the reverse electromagnetic force required to dissipate the permanent magnetic force of the permanent magnet is smaller, and thus the power is smaller and the heat generation is smaller, thus ensuring the service life, braking effect and efficiency.

[0020] The rotor includes a brake disc 2 movably arranged on the open end surface of the coil disc 1, and a plate spring 3 is arranged on the side of the brake disc 2 away from the coil disc 1, and the brake disc 2 is fixedly connected to the plate spring 3; during installation, the stator is installed in the motor housing, and the rotor is installed on the motor output shaft. After the rotor is assembled, it is an integral part with the motor output shaft and rotates or stops at the same time as the motor output shaft.

[0021] The permanent magnet 13 is in the shape of an annular plate, and is sleeved on the outer peripheral side of the bottom surface of the sleeve 11;

[0022] The leaf spring 3 is threadedly connected to the brake disc 2 via a fixing bolt 31. Specifically, the leaf spring 3 is annular, and a plurality of fixing holes and fixing bolts 31 are provided along its circumference. The non-nut end of the fixing bolt 31 is threadedly connected to the brake disc 2.

[0023] A conductive wire is fixedly connected to one side of the coil disk 1 , and the conductive wire passes through the coil disk 1 and extends into the inside of the coil disk 1 to be connected to the coil 12 , and the coil 12 is annular.

[0024] When no power is supplied, the plate spring will deform due to the permanent magnetic force of the permanent magnet, and the brake plate will be attracted to the end surface of the coil disk until it is fully contacted and stopped, thereby fixing the motor output shaft.

[0025] When power is turned on (DC24V), the current is introduced into the coil through the wire, so that the coil will generate a regular N-level and S-level magnetic field, which is just balanced with the permanent magnetic field of the permanent magnet and has opposite magnetic poles. At this time, the attraction of the permanent magnet disappears, the plate spring elastically resets, and the brake plate resets to its original position, so that the motor output shaft can rotate freely.

[0026] The above-described implementation methods of the utility model do not constitute a limitation on the protection scope of the utility model. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model shall be included in the protection scope of the claims of the utility model.

Claims

1. A novel permanent magnet brake, comprising a stator and a rotor, characterized in that: The stator comprises a coil disk (1), a shaft sleeve (11) is centrally arranged in the coil disk (1), a coil (12) is sleeved on the outer surface of the shaft sleeve (11), and a permanent magnet (13) is arranged between the inner bottom surface of the shaft sleeve (11) and the inner bottom surface of the coil disk (1); The permanent magnet (13) is in the shape of an annular plate and is sleeved on the outer peripheral side of the bottom surface of the shaft sleeve (11).

2. A novel permanent magnet brake according to claim 1, characterized in that: The rotor comprises a brake disc (2) movably arranged on the open end surface of the coil disc (1); a plate spring (3) is arranged on the side of the brake disc (2) away from the coil disc (1); and the brake disc (2) is fixedly connected to the plate spring (3).

3. A novel permanent magnet brake according to claim 2, characterized in that: The plate spring (3) and the brake disc (2) are threadedly connected via fixing bolts (31).

4. A novel permanent magnet brake according to claim 3, characterized in that: The plate-shaped spring (3) is annular, has a plurality of fixing holes opened along its circumference and is provided with fixing bolts (31), and the non-nut end of the fixing bolt (31) is threadedly connected to the brake disc (2).

5. A novel permanent magnet brake according to claim 4, characterized in that: A conductive wire is fixedly connected to one side of the coil disk (1), and the conductive wire passes through the coil disk (1) and extends into the interior of the coil disk (1) to be connected to the coil (12).

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