Power-on brake

Abstract

The utility model relates to the technical field of brakes, and particularly discloses an electricity-obtaining brake which comprises a magnet yoke, a movable plate and a rotor, the rotor is arranged between the magnet yoke and the movable plate, a reset spring is installed on the end face of one side of the magnet yoke, the movable plate is provided with an extending portion, the extending portion bypasses the movable plate to be connected with the reset spring, and the magnet yoke is provided with a magnet. And the magnet yoke is electrified to attract the movable plate to clamp the rotor in a pulling and holding manner for brake contact. According to the utility model, the two sides of the rotor can be in double-sided braking contact, the braking area is increased, and the braking torque is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of brake technology, and more specifically, to an energized brake. Background Technology

[0002] An energized brake is a common braking device. It typically consists of a magnetic yoke, brake disc, moving plate, and spring. When no power is applied, the spring force causes the moving plate to grip the brake disc tightly, generating friction and thus braking the equipment. When the excitation coil is energized, a magnetic field is generated. This magnetic force overcomes the spring force, causing the brake arm to separate from the brake disc, releasing the brake and allowing the equipment to operate normally.

[0003] Traditional electric brakes achieve single-sided friction braking by controlling the brake plate to move closer to or away from the rotor through power switching. Their braking torque is relatively small, and the air gap must be guaranteed when the brake leaves the factory, which is quite troublesome. Utility Model Content

[0004] The purpose of this invention is to provide an energized brake that achieves double-sided braking friction to increase braking torque.

[0005] This utility model is achieved through the following technical solution: an energized brake, comprising a magnetic yoke, a moving plate, and a rotor, wherein the rotor is disposed between the magnetic yoke and the moving plate, and a return spring is installed on one end face of the magnetic yoke; the moving plate has an extension on the side near the magnetic yoke, through which the extension passes over the moving plate and connects with the return spring; the magnetic yoke is energized to attract the moving plate and clamp the rotor for braking.

[0006] Furthermore, a braking grinding plate is provided between the magnetic yoke and the rotor, and the braking grinding plate is threadedly connected to the magnetic yoke.

[0007] Furthermore, friction plates are bonded to both sides of the rotor.

[0008] Furthermore, it also includes a cover plate disposed adjacent to the moving plate, the cover plate being connected and fixed to the magnetic yoke.

[0009] Furthermore, a sleeve abuts against the end face of the magnetic yoke and the end face of the cover plate, and a connecting screw is provided between the magnetic yoke and the cover plate; the connecting screw passes through the cover plate and the sleeve in sequence and is connected to the magnetic yoke.

[0010] Furthermore, a splined bushing is connected to the inner bore of the rotor.

[0011] Furthermore, the thickness of the spline bushing is greater than the thickness of the rotor.

[0012] Furthermore, the moving plate is a cover structure, and the rotor is installed inside the moving plate.

[0013] The technical solution of this utility model has at least the following advantages and beneficial effects: This utility model clamps the rotor between the moving plate and the magnetic yoke. When the magnetic yoke is energized, it attracts the moving plate, so that the moving plate and the magnetic yoke form a pulling and hugging structure to clamp the rotor and achieve braking. Thus, the moving plates and brake grinding plates on both sides of the rotor can make braking contact with the rotor on both sides, which increases the braking contact area and the brake has a larger braking torque. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the rear structure of the energized brake in this utility model;

[0015] Figure 2 for Figure 1 The structural cross-sectional view at point AA.

[0016] Reference numerals: 1-Magnetic yoke, 2-Moving plate, 3-Rotor, 31-Friction plate, 4-Reset spring, 5-Brake grinding plate, 6-Sleeve, 7-Connecting screw, 8-Splined bushing, 9-Cover plate. Detailed Implementation

[0017] The following description, in conjunction with specific embodiments, provides further details. Figures 1-2 As shown, this embodiment is an electrically operated brake, the structure of which includes a magnetic yoke 1, a moving plate 2, and a rotor 3. Unlike conventional brake designs, the rotor 3 is located between the magnetic yoke 1 and the moving plate 2, and a return spring 4 is connected between the moving plate 2 and the magnetic yoke 1. The extension of the moving plate 2 can either pass around the outer edge of the rotor 2 to connect with the return spring 4, or it can pass through the rotor 2 to connect with the return spring 4. It is necessary to always maintain a non-overlapping area between the rotor 3 and the moving plate 2 in the axial direction. The extension connects with the return spring 4 through this non-overlapping gap. Simply connect them; when the magnetic yoke 1 is energized, the moving plate 2 is attracted to clamp the rotor 3 for braking; specifically, during the use of this brake, the coil of the magnetic yoke 1 is energized, causing the magnetic yoke 1 to attract the moving plate 2 to move towards the magnetic yoke 1, the return spring 4 is compressed, and then the two sides of the rotor 3 are squeezed and contacted respectively. The two end faces of the rotor 3 respectively make braking contact with the end face of the magnetic yoke 1 and the end face of the moving plate 2, which greatly improves its braking torque; when the coil of the magnetic yoke 1 is de-energized, the return spring 4 springs back and the moving plate 2 is reset, and the braking of the rotor 3 is released.

[0018] The voltage of the magnetic yoke 1 can be changed, thereby changing the magnitude of the electromagnetic force and the clamping force of the moving plate on the rotor, so as to achieve adjustable torque.

[0019] Meanwhile, the rotor is not limited to a single rotor 3, and multiple friction assemblies can be used in axial stacking to increase the braking friction area.

[0020] In addition, the rotor 3 will gradually wear down, which will reduce the gap of the brake accordingly. The distance between the magnetic yoke 1 and the moving plate 2 will become closer. Therefore, the magnetic attraction of the magnetic yoke 1 to the moving plate 2 will increase slightly, and the braking torque will increase.

[0021] Reference Figure 2 As shown, in order to increase the friction between the contact surface of the rotor 3 and the magnetic yoke 1, a brake grinding plate 5 is provided between the magnetic yoke 1 and the rotor 3, and the brake grinding plate 5 is threadedly connected to the magnetic yoke 1; specifically, the brake grinding plate 5 and the magnetic yoke 1 are connected by screws, so that the brake grinding plate 5 can be replaced after wear after a period of use, thus extending the service life of the brake.

[0022] Friction plates 31 are consumables, so friction plates 31 are bonded to both sides of rotor 3 to reduce replacement and usage costs.

[0023] This embodiment also includes a cover plate 9 disposed adjacent to the moving plate 2. The cover plate 9 is connected and fixed to the magnetic yoke 1. The moving plate 2 is a cover structure, and the rotor 3 is installed inside the moving plate 2. Specifically, the cover plate 9 covers the brake grinding plate 5 and the rotor 3. The size of the brake grinding plate 5 is adapted to the inner hole of the cover plate 9 for guidance. The cover plate 9 also plays a certain role in dust prevention.

[0024] like Figure 2 As shown, a sleeve 6 abuts between the end face of the magnetic yoke 1 and the end face of the cover plate 9, and a connecting screw 7 is provided between the magnetic yoke 1 and the cover plate 9; the connecting screw 7 passes through the cover plate 9 and the sleeve 6 in sequence and is connected to the magnetic yoke 1.

[0025] In addition, a splined bushing 8 is connected to the inner hole of the rotor 3, and is connected to the output shaft through the splined bushing 8; the thickness of the splined bushing 8 is greater than the thickness of the rotor 3, so that the rotor 3 has a certain stroke movement in the axial direction.

[0026] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An energized brake, comprising a magnetic yoke (1), a moving plate (2), and a rotor (3), characterized in that: The rotor (3) is located between the magnetic yoke (1) and the moving plate (2), and a return spring (4) is installed on one end face of the magnetic yoke (1); The movable plate (2) has an extension on the side near the magnetic yoke (1), and the extension passes over the movable plate (2) to connect with the return spring (4); The magnetic yoke (1) is energized and attracts the moving plate (2), which clamps the rotor (3) in a pulling manner to make braking contact.

2. The energized brake according to claim 1, characterized in that: A brake grinding plate (5) is provided between the magnetic yoke (1) and the rotor (3), and the brake grinding plate (5) is threadedly connected to the magnetic yoke (1).

3. The energized brake according to claim 2, characterized in that: Friction plates (31) are bonded to both sides of the rotor (3).

4. The energized brake according to claim 1, characterized in that: It also includes a cover plate (9) disposed adjacent to the moving plate (2), and the cover plate (9) is connected and fixed to the magnetic yoke (1).

5. The energized brake according to claim 4, characterized in that: A sleeve (6) abuts against the end face of the magnetic yoke (1) and the end face of the cover plate (9), and a connecting screw (7) is provided between the magnetic yoke (1) and the cover plate (9); The connecting screw (7) passes through the cover plate (9) and the sleeve (6) in sequence and is connected to the magnetic yoke (1).

6. The energized brake according to claim 1, characterized in that: The inner hole of the rotor (3) is connected to a splined bushing (8).

7. The energized brake according to claim 6, characterized in that: The thickness of the spline bushing (8) is greater than the thickness of the rotor (3).

8. The energized brake according to claim 1, characterized in that: The moving plate (2) is a cover structure, and the rotor (3) is installed inside the moving plate (2).

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