Tapered rotor brake motor

Abstract

A conical rotor brake motor comprises a machine shell, a stator is fixedly installed in the machine shell, a rotor is inserted in the stator, the left end and the right end of the machine shell are fixedly connected with a left end cover and a right end cover 11 respectively, the right portion of the rotor is conical, a conical portion (9) of the rotor is exposed out of the right end of the stator, and a brake 9 is arranged on the conical portion in a covering mode and is cylindrical. The brake is made of a magnetic metal material, the right end of the brake is closed, the closed part is sleeved on the rotating shaft in a matched manner, the brake can only axially move on the rotating shaft, the left end of the brake has a taper matched with the conical part, and a spring (10) is arranged in the brake and is positioned between the right end surface of the conical part and the closed surface of the brake; a friction ring (12) is arranged on the inner side face of the right end cover, and the closed face of the brake can be attached to the ring face of the friction ring. The brake device has the beneficial effects that an electromagnet is omitted, the brake device can be installed in the machine shell, and the size of the brake motor is reduced; during operation of the motor, no electric energy consumption of the electromagnet is generated, and energy conservation is facilitated.

Description

Technical Field

[0001] The invention relates to a conical rotor brake motor. Background Art

[0002] When a motor stops running, it quickly stops the rotor. Existing designs include a braking device mounted externally on the motor housing. The braking device comprises an electromagnet, a brake, and a spring. When the motor is powered, the electromagnet is simultaneously energized, engaging the electromagnet and compressing the spring, releasing the brake and freeing the rotor. When the motor is powered off, the electromagnet loses power, releasing the electromagnet and releasing the spring, causing the brake to grip the rotor shaft and quickly stop the rotor. However, the braking device, mounted externally on the motor, occupies a large space, and the electromagnet consumes energy continuously during operation. Summary of the Invention

[0003] In order to reduce the power consumption of a brake motor during operation and reduce the volume of the brake motor, the present invention proposes a conical rotor brake motor.

[0004] The technical solution of the present invention is a conical rotor brake motor, which includes a casing 3, a stator 5 fixedly installed in the casing, a rotor 6 inserted in the stator, a left end cover 2 fixedly connected to the left end of the casing, and a right end cover 11 fixedly connected to the right end of the casing. The two ends of the rotor shaft 1 are supported in the left end cover and the right end cover respectively through bearings. The characteristic is that the right part of the rotor is conical, the conical part 9 of the rotor is exposed from the right end of the stator, and a brake 9 is covered on the conical part. The brake is cylindrical, made of magnetic conductive metal material, and its right end is closed. The closing part is fitted on the rotating shaft, and the brake can only move axially on the rotating shaft. The left end of the brake has a taper that matches the conical part. A spring 10 is provided in the brake, and the spring 10 is located between the right end surface of the conical part and the closing surface of the brake; a friction ring 12 is provided on the inner side surface of the right end cover, and the closing surface of the brake can be in contact with the annular surface of the friction ring.

[0005] The beneficial effects of the present invention are that the electromagnet is omitted, the brake device can be installed in the casing, and the volume of the brake motor is reduced; when the motor is running, there is no electric energy consumption of the electromagnet, which is beneficial to energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a structural schematic diagram of the present invention.

[0007] Figure symbols: 1-rotating shaft, 2-left end cover, 3-housing, 4-merging ring, 5-stator, 6-rotor, 7-guide bar, 8-conical part, 9-brake, 10-spring, 11-right end cover, 12-friction ring, 13-bearing, 14-bar key. DETAILED DESCRIPTION

[0008] A conical rotor brake motor includes a casing 3, a stator 5 fixedly mounted in the casing, a rotor 6 inserted in the stator, a left end cover 2 fixedly connected to the left end of the casing, and a right end cover 11 fixedly connected to the right end of the casing. The two ends of the rotor shaft 1 are supported in the left and right end covers respectively by bearings 13, and the bearings 13 are angular contact ball bearings or tapered roller bearings; a plurality of guide bars 7 are embedded axially on the outer circle of the rotor, and the two ends of the guide bars 7 are respectively connected to slip rings 4.

[0009] Its characteristic is that the right part of the rotor is conical, and the conical part 9 of the rotor is exposed from the right end of the stator. A brake 9 is covered on the conical part. The brake is cylindrical and made of electrical pure iron. Its right end is closed, and the closed part is fitted on the rotating shaft. The brake can only move axially on the rotating shaft. The left end of the brake has a taper that matches the conical part. A spring 10 is provided in the brake, and the spring 10 is located between the right end face of the conical part and the closed surface of the brake; a friction ring 12 is provided on the inner side face of the right end cover 11, and the closed surface of the brake can be in contact with the annular surface of the friction ring.

[0010] Its working principle is that after the motor is energized, the stator generates a rotating magnetic field, generating an induced potential on the rotor's conductive bar 7. The two ends of the conductive bar are connected in parallel through a bus ring, and an induced current is generated in the conductive bar. The induced current generates a magnetic field, wherein the magnetic attraction of the magnetic field of the conical part has an axial component, which has an attractive effect on the brake, separating the brake closing surface from the friction ring and compressing the spring in the brake at the same time; after the motor is powered off, the spring resets, and the elastic force of the spring makes the brake closing surface stick to the friction ring, and the friction between them causes the motor rotor to stop rotating quickly.

[0011] The cone angle of the tapered portion 8 can be selected between 30 degrees and 90 degrees, preferably 60 degrees.

[0012] Because the brake can only move axially on the rotating shaft but cannot rotate relatively, the closing portion and the rotating shaft are spline-fitted, or a strip key 14 is provided between the closing portion and the rotating shaft.

[0013] The friction ring 12 can be installed on the inner side surface of the right end cover 11 , and the friction ring can also extend from the inner side surface of the right end cover 11 .

Claims

1. A conical rotor brake motor, comprising a housing (3), a stator (5) fixedly mounted in the housing, a rotor (6) inserted into the stator, a left end cover (2) fixedly connected to the left end of the housing, a right end cover (11) fixedly connected to the right end of the housing, and a rotor shaft (1) having two ends supported in the left end cover and the right end cover respectively through bearings, wherein: The right part of the rotor is conical, and the conical part (9) of the rotor is exposed from the right end of the stator. A brake (9) is covered on the conical part. The brake is cylindrical and made of a magnetic metal material. Its right end is closed, and the closed part is fitted on the rotating shaft. The brake can only move axially on the rotating shaft. The left end of the brake has a taper that matches the conical part. A spring (10) is provided in the brake, and the spring is located between the right end surface of the conical part and the closed surface of the brake; a friction ring (12) is provided on the inner side surface of the right end cover, and the closed surface of the brake can be in contact with the annular surface of the friction ring.

2. The conical rotor brake motor according to claim 1, characterized in that: The cone angle of the tapered portion (8) is 60 degrees.

3. The conical rotor brake motor according to claim 1, characterized in that: A strip key (14) is provided between the closing portion and the rotating shaft.

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