CN-224218221-U - Motor with braking function

CN224218221UCN 224218221 UCN224218221 UCN 224218221UCN-224218221-U

Abstract

The utility model discloses a motor with a braking function, which comprises a motor main body, a driving shaft and a braking device, wherein the braking device comprises a friction ring and an elastic ring, the friction ring is sleeved on the driving shaft and is circumferentially provided with a plurality of arc friction plates attached to the surface of the driving shaft, gaps are formed between the adjacent arc friction plates, the elastic ring is sleeved on the peripheral wall of the arc friction plates and is used for enabling the arc friction plates to radially shrink to press the driving shaft, and the friction ring is provided with a limiting part which is in limiting fit with the motor main body and is used for limiting the rotation of the friction ring. The motor with the braking function enables the friction ring not to be easily worn, has long service life and good self-locking stability.

Inventors

XIANG LEHONG
ZHAO HONGJIANG
ZHAO MINGXING

Assignees

浙江乐歌智能驱动科技有限公司

Dates

Publication Date: 20260508
Application Date: 20250421

Claims (9)

1. A motor with a braking function is characterized by comprising A motor main body and a driving shaft, The braking device comprises a friction ring and an elastic ring, wherein the friction ring is sleeved on the driving shaft, a plurality of arc friction plates attached to the surface of the driving shaft are arranged on the friction ring along the circumferential direction, gaps are formed between the adjacent arc friction plates, the elastic ring is sleeved on the peripheral wall of the arc friction plates and used for enabling the arc friction plates to radially shrink so as to compress the driving shaft, and a limiting part is arranged on the friction ring and is in limiting fit with the motor main body and used for limiting the rotation of the friction ring.
2. The motor with a braking function according to claim 1, wherein an arc-shaped groove is formed in the peripheral wall of each arc-shaped friction plate along the circumferential direction, the arc-shaped grooves in the arc-shaped friction plates are enclosed to form an annular clamping groove for clamping the elastic ring, and the inner diameter of the elastic ring is smaller than that of the annular clamping groove.
3. The motor with braking function as set forth in claim 2, wherein the arc-shaped groove is provided at a free end of the arc-shaped friction plate.
4. The motor with a braking function according to claim 1, wherein the friction ring is interference fit with the drive shaft.
5. The motor with the braking function according to claim 1, wherein the friction ring is provided with at least one protruding block protruding radially outwards, the protruding block forms the limiting part, and the motor main body is provided with a clamping groove matched and clamped with the protruding block.
6. The motor with braking function according to claim 5, wherein the plurality of projections are distributed along the circumferential direction of the friction ring.
7. The motor with braking function according to claim 5, wherein one end of the motor body is connected with an end cover through which the driving shaft passes, and the clamping groove is formed in the end cover.
8. The motor with the braking function of claim 1, wherein the friction ring is provided with at least one limiting groove, the limiting groove forms the limiting part, and the motor main body is provided with a limiting block which is matched and clamped with the limiting groove.
9. The motor with a braking function according to claim 1, wherein the elastic ring is an annular elastic ring made of rubber.

Description

Motor with braking function Technical Field The application relates to the technical field of driving motors, in particular to a motor with a braking function. Background Currently, electric furniture, such as electric sofas, electric lifting platforms, electric folding beds, and the like, are equipped with linear driving devices. The linear driving device is also called a linear actuator and is used for converting kinetic energy of rotary motion of a driving motor into power in a linear direction. In order to prevent the electric furniture from being passively lowered under the action of a large external load or to enable the electric furniture to be stably kept in a specific posture, a braking device is generally arranged on a driving shaft of a driving motor of the linear driving device, the braking device is used for controlling the motor precision, or the braking device can generate self-locking force when the driving shaft of the driving motor passively rotates so as to prevent or limit the driving shaft from passively rotating, and the stability of the electric furniture in use is ensured, for example, a Chinese patent application with the name of CN215861421U and having a self-locking function and a linear actuator is disclosed, a friction ring is sleeved on the driving shaft of the motor, a notch is arranged on the friction ring, a limiting part is arranged on the friction ring, an end cover of the motor is matched with the limiting part to limit, and particularly, a groove-shaped clamping part is arranged on the end cover, and the limiting part of the friction ring circumferentially limits in the clamping part, so that the friction ring tightly holds the driving shaft when the driving shaft rotates along a first direction, and realizes self-locking or braking of the driving shaft. The motor or the motor with the self-locking function in the related art has the common defects that the self-locking force is reduced and the self-locking stability is poor because the limiting part on the friction ring and the groove-shaped clamping part on the end cover are hard to resist and limit in the process that the friction ring tightly holds the driving shaft to provide the driving shaft rotation resistance or the driving shaft is stopped rotating, the friction ring is easy to be worn and disabled in the actual use process. Disclosure of utility model The application aims to overcome the defects of the related art and provide the motor with the braking function, which is difficult to wear the friction ring, long in service life and good in self-locking stability. The technical proposal of the application is to provide a motor with braking function, which has the following structure that comprises A motor main body and a driving shaft, The braking device comprises a friction ring and an elastic ring, wherein the friction ring is sleeved on the driving shaft, a plurality of arc friction plates attached to the surface of the driving shaft are arranged on the friction ring along the circumferential direction, gaps are formed between the adjacent arc friction plates, the elastic ring is sleeved on the peripheral wall of the arc friction plates and used for enabling the arc friction plates to radially shrink so as to compress the driving shaft, and a limiting part is arranged on the friction ring and is in limiting fit with the motor main body and used for limiting the rotation of the friction ring. In some embodiments, the outer peripheral wall of each arc friction plate is provided with an arc groove along the circumferential direction, and the arc grooves on the arc friction plates are enclosed to form an annular clamping groove for the elastic ring to be clamped, and the inner diameter size of the elastic ring is smaller than the inner diameter size of the annular clamping groove. In some embodiments, the arcuate groove is disposed at a free end of the arcuate friction plate. In some embodiments, the friction ring is an interference fit with the drive shaft. In some embodiments, the friction ring is provided with at least one protruding block protruding radially outwards, the protruding block forms the limiting part, and the motor main body is provided with a clamping groove matched and clamped with the protruding block. In some embodiments, the protrusions are a plurality and distributed along the circumference of the friction ring. In some embodiments, one end of the motor body is connected with an end cover through which the driving shaft passes, and the clamping groove is formed in the end cover. In some embodiments, the friction ring is provided with at least one limit groove, the limit groove forms the limit part, and the motor main body is provided with a limit block which is clamped with the limit groove in a matching way. In some embodiments, the elastic ring is an annular elastic ring made of rubber. In summary, compared with the related art, the motor with the braking function has the advantages that