Double electromagnetic brake

Abstract

The utility model relates to the field of electromagnetic brakes, in particular to a double electromagnetic brake which comprises a flange plate, brake units are arranged on the two sides of the flange plate respectively, and the two brake units are arranged oppositely. The brake unit comprises a magnet yoke, a movable plate and a rotor which are arranged in sequence; the flange plate is clamped between the two rotors, and the two braking units are powered off to push the two rotors to be close to each other to clamp the flange plate to achieve braking contact. The two brake units are connected and can be used independently and act together, larger brake torque is achieved, and use safety is guaranteed.

Description

Technical Field

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

[0002] An electromagnetic brake is a device that converts electromagnetic energy into mechanical energy to achieve braking (decelerating or stopping moving parts). An electromagnetic brake generally consists of a brake disc, brake friction pads, and an electromagnet. When the coil of the electromagnetic brake is energized, the electromagnet generates a magnetic field. This magnetic field attracts the armature, causing the brake friction pads to fit tightly against the brake disc. Due to the friction, the moving parts are subjected to a braking torque, thus achieving deceleration or stopping. When the coil is de-energized, the magnetic field disappears, and the brake friction pads separate from the brake disc under the action of a spring or other reset mechanism, allowing the moving parts to resume normal movement.

[0003] Traditional brakes typically have only one braking unit, which achieves braking by controlling the engagement of the control plate and its contact with the rotor. However, when used in the lifting field, the braking effect of the brake weakens as its service life increases. When suspending heavy objects with ropes, the required braking torque is large, and a single braking unit is prone to braking failure or slippage, which can lead to the heavy object falling and make it difficult to guarantee safety. Utility Model Content

[0004] The purpose of this invention is to provide a double electromagnetic brake that can greatly improve braking torque, thereby ensuring safety in lifting and other fields.

[0005] This utility model is achieved through the following technical solution: a double electromagnetic brake, including a flange plate, with braking units respectively arranged on both sides of the flange plate, and the two braking units are arranged facing each other; the braking unit includes a magnetic yoke, a moving plate and a rotor arranged in sequence; the flange plate is sandwiched between the two rotors, and braking contact is achieved by de-energizing the two braking units to push the rotors to clamp the flange plate.

[0006] Furthermore, a connecting screw passes between the flange plate and the magnetic yoke.

[0007] Furthermore, it also includes a sleeve, the two ends of which abut against the end face of the flange plate and the end face of the magnetic yoke, respectively; the connecting screw passes through the sleeve.

[0008] Furthermore, the magnetic yoke of the braking unit is provided with a fixed mounting end; the outer edge of the magnetic yoke is provided with a plurality of mounting through holes, and the end face of the magnetic yoke away from the flange plate is provided with a mating groove.

[0009] Furthermore, the inner bore of the rotor is provided with a bushing, and the bushing is connected to the rotor by a spline.

[0010] Furthermore, a braking spring is embedded in the middle of the magnetic yoke, and one end of the braking spring abuts against the moving plate.

[0011] Furthermore, a bearing adapted to the rotating shaft is inserted into the inner hole of one of the magnetic yokes.

[0012] The technical solution of this utility model has at least the following advantages and beneficial effects: By installing opposing braking units on both sides of a stationary flange plate, the two braking units work independently or in conjunction to perform clamping braking on the flange plate and multi-face friction braking, which greatly improves the braking torque. When used in the lifting industry, if the braking effect of one braking unit deteriorates and slips, the other braking unit can provide additional braking assistance, further ensuring its safety. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the rear structure of the double electromagnetic brake in this utility model;

[0014] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure along the AA direction;

[0015] Figure 3 This is a front structural diagram of the double electromagnetic brake in this utility model.

[0016] Reference numerals: 1-Brake unit, 11-Magnetic yoke, 111-Mounting through hole, 112-Mating groove, 12-Rotor, 13-Moving plate, 14-Connecting screw, 15-Shaft sleeve, 16-Brake spring, 17-Bearing, 18-Sleeve tube, 2-Flange plate. Detailed Implementation

[0017] The following description, in conjunction with specific embodiments, provides further details. Figures 1-3As shown, this embodiment is a double electromagnetic brake, including a flange plate 2, with braking units 1 arranged on both sides of the flange plate 2, and the two braking units 1 facing each other. Each braking unit 1 includes a magnetic yoke 11, a moving plate 13, and a rotor 12 arranged sequentially. The flange plate 2 is sandwiched between the two rotors 12. Braking contact is achieved by de-energizing the two braking units 1 to push the rotors 12 against the flange plate 2. Specifically, compared to traditional electromagnetic brakes, when applied to lifting and other fields, typically only a single rotor 12 is connected to the shaft. After prolonged use and wear, the brake is more prone to reduced braking torque and slippage, leading to safety hazards in the operation of lifting equipment and the possibility of heavy objects falling during lifting. This double brake, by setting braking units 1 on both sides of the stationary flange plate 2, with both rotors 12 connected to the shaft, allows the two braking units 1 to work independently or in tandem, improving the brake's flexibility and safety, and resulting in higher braking effect and safety capabilities.

[0018] like Figure 2 As shown, in this embodiment, a connecting screw 14 passes through the flange plate 2 and the magnetic yoke 11; specifically, the magnetic yoke 11 and the flange plate 2 are connected and fixed to form a whole by the connecting screw 14, and the rotor 12 contacts the flange plate 2 and the moving plate 13 in the stationary state on both sides respectively.

[0019] This embodiment also includes a sleeve tube 18, the two ends of which abut against the end face of the flange plate 2 and the end face of the magnetic yoke 11, respectively; the connecting screw 14 passes through the sleeve tube 18; specifically, the sleeve tube 18 abuts against the end face of the flange plate 2 and the magnetic yoke 11 to ensure the movement clearance between the rotor 12 and the moving plate 13.

[0020] like Figure 2 As shown, the magnetic yoke 11 of one braking unit 1 has a fixed mounting end, that is, the magnetic yoke 11 and the motor end cover are an integral structure. This end is fixed and the number of parts is reduced. Such a structure is both compact and saves the cost of the whole system (motor + brake). The other magnetic yoke 11 is a separate component. The outer edge of the magnetic yoke 11 has several mounting through holes 111, and the end face of the magnetic yoke 11 away from the flange plate 2 has a mating groove 112. Specifically, the magnetic yoke 11 is connected and fixed to the mounting end by mating with the mounting end through the mounting through holes 111 and screws pass through the mounting through holes 111.

[0021] Optionally, a bushing 15 is provided in the inner hole of the rotor 12, and the bushing 15 is connected to the rotor 12 by a spline. The bushing 15 is fitted onto the output shaft.

[0022] like Figure 2As shown, in this embodiment, a brake spring 16 is embedded in the middle of the magnetic yoke 11, and one end of the brake spring 16 abuts against the moving plate 13. Specifically, the brake spring 16 is installed in the slot of the magnetic yoke 11, which can guide the elastic force of the brake spring 16. When the magnetic yoke 11 is de-energized, the brake spring 16 pushes out of the moving plate 13 and contacts the rotor 12.

[0023] A bearing 17 adapted to the rotating shaft is inserted into the inner hole of one of the magnetic yokes 11, and this bearing 17 is fitted onto the output rotating shaft.

[0024] 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. A double electromagnetic brake, characterized in that: Includes a flange plate (2), on both sides of the flange plate (2) are respectively provided with braking units (1), and the two braking units (1) are arranged facing each other; The braking unit (1) includes a magnetic yoke (11), a moving plate (13), and a rotor (12) arranged in sequence; The flange plate (2) is sandwiched between the two rotors (12). By de-energizing the two braking units (1), the two rotors (12) are pushed to move towards each other and clamp the flange plate (2) to achieve braking contact.

2. The double electromagnetic brake according to claim 1, characterized in that: A connecting screw (14) passes between the flange plate (2) and the magnetic yoke (11).

3. The double electromagnetic brake according to claim 2, characterized in that: It also includes a sleeve (18), the two ends of which abut against the end face of the flange plate (2) and the end face of the magnetic yoke (11), respectively; The connecting screw (14) passes through the sleeve (18).

4. The double electromagnetic brake according to claim 1, characterized in that: The magnetic yoke (11) of the braking unit (1) is provided with a fixed mounting end.

5. The double electromagnetic brake according to claim 4, characterized in that: The outer edge of the magnetic yoke (11) is provided with a plurality of mounting through holes (111), and the end face of the magnetic yoke (11) away from the flange plate (2) is provided with a mating groove (112).

6. The double electromagnetic brake according to claim 1, characterized in that: The inner hole of the rotor (12) is provided with a bushing (15), and the bushing (15) is connected to the rotor (12) by a spline.

7. The double electromagnetic brake according to claim 1, characterized in that: A braking spring (16) is embedded in the middle of the magnetic yoke (11), and one end of the braking spring (16) abuts against the moving plate (13).

8. The double electromagnetic brake according to claim 1, characterized in that: One of the magnetic yokes (11) has a bearing (17) adapted to the rotating shaft inserted into its inner hole.

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