CN-121984273-A - Damping device for motor rotation shaft

Abstract

The embodiment of the invention provides a damping device for a motor rotating shaft, which comprises a fixed seat, a pair of damping sheets, a pair of second limiting parts and a clamping spring, wherein the fixed seat is fixed on the outer wall of one end of a shell of a driving motor, which is used for extending out of the rotating shaft, the first limiting parts are uniformly distributed around the rotating shaft, each damping sheet is in a part of a circular ring shape formed by extending along the circumference, the second limiting parts are arranged on at least one damping sheet, the inner side wall close to the center of a circle is used as a damping friction surface and is opposite to the outer side wall of the rotating shaft, the second limiting parts are correspondingly matched with the first limiting parts on the fixed seat to limit the damping sheets in the circumferential direction, the clamping spring is correspondingly clamped on the outer side of the damping sheets, and the clamping force of the clamping spring enables the damping friction surface of each damping sheet to be tightly abutted against the outer side wall of the rotating shaft to form friction damping when the rotating shaft rotates. The damping device for the motor rotating shaft, provided by the embodiment of the invention, has a relatively simple structure, is convenient to process and assemble, and can be applied to various electric intelligent furniture.

Inventors

• WANG XIANCHAO
• LIU XIAOQING

Assignees

• 深圳市墨深智控有限公司

Dates

Publication Date

20260505

Application Date

20260306

Claims (10)

1. 1. A damping device of a motor rotation shaft, which is arranged on a rotation shaft of a driving motor of an electric furniture, characterized in that the damping device comprises: The fixed seat is fixed on the outer wall of one end of the casing of the driving motor, which is used for the rotating shaft to extend out, and at least one first limiting part uniformly distributed around the rotating shaft is also arranged on the fixed seat; A pair of damping sheets, each of which is a part of a circular ring body formed by extending along the circumference, at least one damping sheet is provided with a second limit part, each damping sheet is arranged opposite to the outer side wall of the rotating shaft by taking the inner side wall close to the center of a circle as a damping friction surface, the second limit part is correspondingly matched with the first limit part on the fixing seat to limit the damping sheet in the circumferential direction, and And the clamping force of the clamping springs promotes the damping friction surface of each damping sheet to tightly lean against the outer side wall of the rotating shaft so as to form friction damping when the rotating shaft rotates.
2. 2. The motor rotating shaft damping device according to claim 1, wherein one pair of adjacent ends of the damping sheets in the circumferential direction are abutted against each other and an inner slot is formed between the other pair of adjacent ends toward the outside, an outer slot is correspondingly formed in the fixing base, the opening of the snap spring, the inner slot and the outer slot are aligned with each other in the circumferential direction when assembled, the damping device further comprises a pry plate, one end of the pry plate is inserted into the outer slot and the other end of the pry plate is inserted into the inner slot, the pry plate has a thickness smaller than the slot width of the outer slot and is matched with the minimum width of the inner slot, and the pry plate is configured to keep synchronous rotation with the two damping sheets when the damping sheets rotate in a first direction along with the rotating shaft and push the two damping sheets to open in a second direction opposite to the first direction along with the rotating shaft so that the two damping sheets form one pair of adjacent ends of the inner slots.
3. 3. The damping device for a motor rotating shaft according to claim 2, wherein the fixing base is formed with a recess in a middle portion of one side wall in an axial direction of the rotating shaft, and the damping fin and the snap spring are both disposed in the recess.
4. 4. A damping device for a motor rotating shaft according to claim 1, 2 or 3, wherein the first limiting portion is a clamping post protruding along an axial direction, the second limiting portion is a clamping groove or an inserting hole formed in a corresponding end wall of the damping piece in the axial direction and corresponding to the clamping post, the length of the clamping groove or the inserting hole is larger than the width of the clamping post, and when the damping piece rotates relative to the fixing seat, the clamping post slides relatively in the clamping groove from a position abutting against an inner wall at one end of the clamping groove to a position abutting against an inner wall at the other end of the clamping groove.
5. 5. The damping device for a motor rotating shaft according to claim 3, wherein the first limiting portion is a clamping post formed by protruding radially from a side wall of the recess and the second limiting portion is a clamping groove formed by recessing radially from an outer side wall of the damping sheet away from a center of a circle, the clamping groove having a predetermined length, the clamping post relatively sliding in the clamping groove from a position abutting against an inner wall of one end of the clamping groove to a position abutting against an inner wall of the other end of the clamping groove when the damping sheet rotates relative to the fixing base, or The first limiting part is a clamping groove formed by radially sinking the side wall of the pit, the second limiting part is a clamping column formed by radially protruding the outer side wall of the damping piece far away from the circle center, the clamping groove has a preset length, and when the damping piece rotates relative to the fixing seat, the clamping column relatively slides in the clamping groove from a position propping against the inner wall of one end of the clamping groove to a position propping against the inner wall of the opposite other end of the clamping groove.
6. 6. The damping device for a motor rotating shaft according to claim 1, wherein each damping fin is provided with the second limiting portion, the fixing seat is correspondingly provided with two first limiting portions, and each damping fin is correspondingly matched with a corresponding one of the first limiting portions on the fixing seat through the second limiting portions.
7. 7. A damping device for a motor rotating shaft according to claim 3, wherein the damping fin includes a main body portion and a flange formed to protrude radially from an end of the main body portion adjacent to a mouth of the recess, the clip spring being engaged on an outer side wall of the main body portion, the flange closing the clip spring within the recess.
8. 8. A damping device for a motor rotating shaft according to claim 3, wherein the fixing base is a ring body having a central hole and correspondingly sleeved on the rotating shaft.
9. 9. A damping device for a motor rotating shaft according to claim 3, wherein the fixing base is formed by a plurality of fixing blocks uniformly distributed on the circumference and respectively fixed on the casing in a matched manner, each fixing block is correspondingly formed with a recess, a recess is formed by the recess on each fixing block in a matched manner, and the first limit part and/or the outer slot are formed on at least a part of the fixing blocks.
10. 10. A damping device for a motor rotary shaft according to claim 3 or 8 or 9, characterized in that the recess is formed in a side wall of the holder facing away from the drive motor.

Description

Damping device for motor rotation shaft Technical Field The embodiment of the invention relates to the technical field of motor drive control of electric furniture, in particular to a damping device of a motor rotating shaft. Background Powered furniture such as powered beds, powered sofas, powered seats, and the like typically employ a drive motor to correspondingly drive a movable member of the furniture. The driving force of the driving motor is often transmitted to the movable member via a worm gear transmission mechanism, and the self-locking characteristic of the worm gear can prevent the movable member from sliding down due to self weight when the motor is turned off. In order to further improve the performance of preventing the movable member from sliding down due to self weight, a special braking device is usually arranged besides the worm gear mechanism to brake the rotating shaft of the driving motor so as to further prevent the movable member from sliding down. A known braking device has at least one braking element which continuously applies a braking force to the braking element and an energy store which applies a radially acting braking force to a rotational shaft of the drive motor, the braking element comprising a base body on which at least one cutout is formed, which cutout originates from a central opening, at least one further cutout originating from the outer circumference of the base body being formed in the base body, the base body having a plurality of cutouts and/or a plurality of further cutouts, respectively arranged in a star shape, at least one further annular section being applied to the at least one braking element and facing the central opening, the surface of the annular section forming a friction surface. However, such a brake device is relatively complex in structure and cumbersome to manufacture and assemble. Disclosure of Invention The technical problem to be solved by the embodiment of the invention is to provide the damping device for the motor rotating shaft, which has a simple structure and is easy to process and assemble. In order to solve the technical problems, the embodiment of the invention firstly provides the following technical scheme that a damping device of a motor rotating shaft is arranged on the rotating shaft of a driving motor of electric furniture and comprises: The fixed seat is fixed on the outer wall of one end of the casing of the driving motor, which is used for the rotating shaft to extend out, and at least two first limiting parts which are uniformly distributed around the rotating shaft are also arranged on the fixed seat; A pair of damping sheets, each of which is a part of a circular ring body formed by extending along the circumference, at least one damping sheet is provided with a second limit part, each damping sheet is arranged opposite to the outer side wall of the rotating shaft by taking the inner side wall close to the center of a circle as a damping friction surface, the second limit part is correspondingly matched with the first limit part on the fixing seat to limit the damping sheet in the circumferential direction, and And the clamping force of the clamping springs promotes the damping friction surface of each damping sheet to tightly lean against the outer side wall of the rotating shaft so as to form friction damping when the rotating shaft rotates. Further, one pair of adjacent ends of the damping sheets in the circumferential direction are abutted against each other, an inner slot is formed between the other pair of adjacent ends and is close to the outer side, an outer slot is correspondingly formed on the fixing seat, when the damping sheets are assembled, the opening of the clamping spring, the inner slot and the outer slot are aligned with each other in the circumferential direction, the damping device further comprises a pry plate, one end of the pry plate is inserted into the outer slot, the other end of the pry plate is inserted into the inner slot, the thickness of the pry plate is smaller than the slot width of the outer slot and is matched with the minimum width of the inner slot, and the pry plate is configured to keep synchronous rotation with the two damping sheets when the damping sheets rotate along the rotating shaft along the first direction, and push the two damping sheets to enable the two damping sheets to form one pair of adjacent ends of the inner slots to open oppositely when the damping sheets rotate along the rotating along the second direction opposite to the first direction. Further, a pit is formed in the middle of one side wall of the fixing seat in the axial direction of the rotating shaft, and the damping fin and the clamp spring are both arranged in the pit. Further, the first limiting portion is a clamping column protruding along the axial direction, the second limiting portion is a clamping groove or an inserting hole formed in the corresponding end wall of the damping piece in the axial di