Permanent magnet roller motor brake

Abstract

The utility model discloses a permanent magnet roller motor brake which comprises a brake shell and a rotor movably inserted in the brake shell, a brake disc is installed on the rotor, the two ends of the brake disc are connected with a brake mechanism, and the brake mechanism comprises an electromagnet, a permanent magnet, a transmission rod, a first brake rod, a first friction plate, a second brake rod and a second friction plate. The beneficial effects of the utility model are that when sudden power failure or emergency situation occurs, the electromagnet is powered off, the permanent magnet adsorbs the transmission rod through the armature, the left end of the permanent magnet deflects downwards, and the friction plate I and the friction plate II are driven to tightly hold the brake disc, so that the rotor is braked, and the situation that equipment is damaged due to the fact that the rotor cannot be kept in a stop state is prevented; when the electromagnet is powered on, the attraction force of the coil is larger than that of the permanent magnet, the left end of the attraction transmission rod deflects upwards, the first friction plate and the second friction plate are separated from the brake disc, and the rotor is in a free rotation state.

Description

Technical Field

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

[0002] A brake is a device used to control and decelerate mechanical motion by applying a braking torque to brake or stop the motion. In a permanent magnet synchronous motor, the function of the brake is to decelerate and stop the rotation of the motor by applying a braking torque.

[0003] At present, most of the brakes used in permanent magnet drum motors are electromagnetic brakes. The rotor is mounted on the motor shaft through the rotor hub, and the stator or plate is fixed on the end cover. When the coil is not energized, the armature presses the rotor through the compressed torque spring, and the rotor is clamped between the armature and the plate, and the shaft servo motor shaft is braked and held by the friction force generated. When the coil is energized, magnetic flux will be generated, and a closed magnetic circuit will be formed between the stator and the armature. The stator overcomes the compression force of the torque spring and attracts the armature. At the same time, the rotor becomes free and the rotating shaft is released. However, when there is a sudden power outage or emergency, the brake cannot keep the motor stopped, which can easily cause equipment damage or even casualties.

[0004] It should be noted that the above contents belong to the technical knowledge of the inventor and do not necessarily constitute prior art. Utility Model Content

[0005] In view of the above defects, the utility model provides a permanent magnet drum motor brake to solve the permanent magnet drum motor braking problem.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A permanent magnet drum motor brake comprises a brake housing and a rotor movably inserted in the brake housing, a brake disc is mounted on the rotor, and brake mechanisms are connected to both ends of the brake disc;

[0008] The braking mechanism includes an electromagnet, a permanent magnet, a transmission rod, a brake rod 1, a friction plate 1, a brake rod 2 and a friction plate 2. The electromagnet is installed on the left side of the brake housing, the permanent magnet is located below the electromagnet, the transmission rod is hinged at the bottom of the brake housing, the brake rod 1 is hinged in the brake housing and is located above the transmission rod, the friction plate 1 is installed at the upper end of the brake rod 1, the brake rod 2 is hinged in the brake housing and is located above the brake disc, and the friction plate 2 is installed at the bottom of the brake rod 2.

[0009] Furthermore, both ends of the rotor are movably inserted into the brake housing through bearings.

[0010] Furthermore, a group of armatures corresponding to the electromagnet and the permanent magnet are installed at the left end of the transmission rod.

[0011] Furthermore, the right end of the transmission rod is hinged to the brake rod one through the connecting rod one, and the left end of the transmission rod is hinged to the brake rod two through the connecting rod two.

[0012] Furthermore, a front end cover is installed at the front end of the brake housing, and a rear end cover is installed at the rear end.

[0013] The utility model provides a permanent magnet drum motor brake, which has the following beneficial effects: when a sudden power outage or emergency occurs, the electromagnet is powered off, the permanent magnet absorbs the transmission rod through the armature, the left end deflects downward, and drives the friction plate 1 and the friction plate 2 to hold the brake disc tightly, thereby braking the rotor to prevent the rotor from being unable to maintain a stopped state, thereby causing damage to the equipment and even causing casualties; when the electromagnet is energized, the coil suction force is greater than the permanent magnet suction force, the left end of the absorption transmission rod deflects upward, the friction plate 1 and the friction plate 2 are separated from the brake disc, and the rotor is in a free rotation state. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of a permanent magnet drum motor brake described in the utility model.

[0015] Figure 2 It is a schematic diagram of the brake mechanism of the utility model.

[0016] Figure 3 This is a schematic diagram of the rotor braking described in the utility model.

[0017] In the figure: 1. brake housing; 2. rotor; 3. brake disc; 4. electromagnet; 5. permanent magnet; 6. transmission rod; 7. brake rod one; 8. friction plate one; 9. brake rod two; 10. friction plate two; 11. bearing; 12. armature; 13. connecting rod one; 14. connecting rod two; 15. front end cover; 16. rear end cover. DETAILED DESCRIPTION

[0018] The utility model is described in detail below in conjunction with the accompanying drawings. Figure 1-3As shown: a permanent magnet drum motor brake, including a brake housing 1 and a rotor 2 movably inserted in the brake housing 1, a brake disc 3 is installed on the rotor 2, and brake mechanisms are connected to both ends of the brake disc 3; the brake mechanism includes an electromagnet 4, a permanent magnet 5, a transmission rod 6, a brake rod 7, a friction plate 8, a brake rod 9 and a friction plate 10, the electromagnet 4 is installed on the left side of the brake housing 1, the permanent magnet 5 is located below the electromagnet 4, the transmission rod 6 is hinged at the bottom of the brake housing 1, the brake rod 7 is hinged in the brake housing 1 and is located above the transmission rod 6, the The friction plate 8 is installed on the upper end of the brake rod 7, the brake rod 9 is hinged in the brake housing 1 and is located above the brake disc 3, and the friction plate 10 is installed at the bottom of the brake rod 9; the two ends of the rotor 2 are movably inserted in the brake housing 1 through bearings 11 respectively; a group of armatures 12 corresponding to the electromagnet 4 and the permanent magnet 5 are installed at the left end of the transmission rod 6; the right end of the transmission rod 6 is hinged to the brake rod 7 through the connecting rod 13, and the left end of the transmission rod 6 is hinged to the brake rod 9 through the connecting rod 2 14; the front end of the brake housing 1 is installed with a front cover 15, and the rear end is installed with a rear cover 16.

[0019] Working principle of this embodiment: The brake is installed between the motor and the reducer, and the electromagnet 4 is controlled by an external controller;

[0020] During braking: the electromagnet 4 is installed on the left side of the brake housing 1, the permanent magnet 5 is located below the electromagnet 4, the transmission rod 6 is hinged at the bottom of the brake housing 1, the brake rod 1 7 is hinged in the brake housing 1 and is located above the transmission rod 6, the friction plate 1 8 is installed at the upper end of the brake rod 1 7, the brake rod 2 9 is hinged in the brake housing 1 and is located above the brake disc 3, the friction plate 2 10 is installed at the bottom of the brake rod 2 9, and a group of armatures 12 corresponding to the electromagnet 4 and the permanent magnet 5 are installed at the left end of the transmission rod 6. The right end of the moving rod 6 is hinged to the brake rod 1 7 through the connecting rod 1 13, and the left end of the transmission rod 6 is hinged to the brake rod 2 9 through the connecting rod 2 14. When a sudden power outage or emergency occurs, the electromagnet 4 is powered off, and the permanent magnet 5 adsorbs the left end of the transmission rod 6 through the armature 12 to deflect downward, and through the connecting rod 1 13 and the connecting rod 2 14, the right end of the brake rod 1 7 is driven to deflect upward, and the left end of the brake rod 2 9 is driven to deflect downward. At this time, the friction plate 1 8 and the friction plate 2 10 are driven to hold the brake disc 3 tightly, thereby achieving braking of the rotor 2. Figure 3 As shown, the rotor 2 is prevented from being unable to maintain a stopped state, thereby causing damage to the equipment or even casualties. On the contrary, when the electromagnet 4 is energized, the suction force of the coil is greater than the suction force of the permanent magnet 5, and the left end of the adsorption transmission rod 6 is deflected upward. At this time, the friction plate 1 8 and the friction plate 2 10 can be driven to separate from the brake disc 3, and the rotor 2 is in a free rotation state.

[0021] The above technical solutions only reflect the preferred technical solutions of the technical solutions of the utility model. Some changes that may be made to certain parts thereof by technicians in this technical field all reflect the principles of the utility model and fall within the protection scope of the utility model.

Claims

1. A permanent magnet drum motor brake, comprising a brake housing (1) and a rotor (2) movably inserted in the brake housing (1), characterized in that: A brake disc (3) is mounted on the rotor (2), and brake mechanisms are connected to both ends of the brake disc (3); The brake mechanism comprises an electromagnet (4), a permanent magnet (5), a transmission rod (6), a brake rod 1 (7), a friction plate 1 (8), a brake rod 2 (9) and a friction plate 2 (10), wherein the electromagnet (4) is mounted on the left side of a brake housing (1), the permanent magnet (5) is located below the electromagnet (4), the transmission rod (6) is hinged at the bottom of the brake housing (1), the brake rod 1 (7) is hinged in the brake housing (1) and is located above the transmission rod (6), the friction plate 1 (8) is mounted on the upper end of the brake rod 1 (7), the brake rod 2 (9) is hinged in the brake housing (1) and is located above the brake disc (3), and the friction plate 2 (10) is mounted at the bottom of the brake rod 2 (9).

2. A permanent magnet drum motor brake according to claim 1, characterized in that: Both ends of the rotor (2) are movably inserted into the brake housing (1) via bearings (11).

3. A permanent magnet drum motor brake according to claim 1, characterized in that: A group of armatures (12) corresponding to the electromagnet (4) and the permanent magnet (5) are mounted on the left end of the transmission rod (6).

4. A permanent magnet drum motor brake according to claim 1, characterized in that: The right end of the transmission rod (6) is hinged to the first brake rod (7) through the first connecting rod (13), and the left end of the transmission rod (6) is hinged to the second brake rod (9) through the second connecting rod (14).

5. The permanent magnet drum motor brake according to claim 1, characterized in that: The front end of the brake housing (1) is mounted with a front cover (15), and the rear end is mounted with a rear cover (16).

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