CN210461534U

CN210461534U - One-way damper

Info

Publication number: CN210461534U
Application number: CN201920959355.1U
Authority: CN
Inventors: 刘裕韬; 朱更兴; 金翔; 刘涛
Original assignee: Changzhou Kaidi Electrical Co Ltd
Current assignee: Changzhou Kaidi Electrical Co Ltd
Priority date: 2019-06-24
Filing date: 2019-06-24
Publication date: 2020-05-05
Anticipated expiration: 2029-06-24

Abstract

The utility model relates to a mechanical part for supporting axle class part, especially, one-way attenuator, among the linear actuator of mainly used electric furniture, overcome the short-lived and loss drive power's of current two-way damping device problem, the scheme is, inside one-way bearing has, the internal surface of one-way bearing inner circle is equipped with the keyway, the surface of outer lane does not establish the keyway, one-way bearing outside has the elastic friction ring of lock ring on the outer lane, it is further, the elastic friction ring still is equipped with the lock ring of lock ring in elastic friction ring outward, the intra-annular at lock ring both ends is equipped with the interior jump ring that blocks elastic friction ring end face in the axial location of elastic friction ring, still be equipped with the stationary blade between interior jump ring and the elastic friction ring end face.

Description

One-way damper

Technical Field

The utility model relates to a mechanical part for supporting axle class part, especially an one-way damper, mainly used in the linear actuator of electronic furniture.

Background

The general electric furniture industry needs to adopt a damping device, and the damping device acts on a driving screw rod, so that a nut which moves linearly does not move relative to the screw rod under the condition that the nut does not have power but is influenced by gravity or external force in certain directions and in certain magnitude.

The existing damping devices are bidirectional damping devices, namely the positive and negative rotation directions of the screw rod are all subjected to the resistance of the damping devices, the service life of the device is short, the driving force is lost, and the traditional one-way bearing is used as a damper to generate damping failure problems caused by that the descending starting moment generates noise and the dragging torque is greatly reduced when the continuous reverse rotation is carried out.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: overcomes the defects in the prior art and provides a one-way damper suitable for application.

The utility model provides a technical scheme that its technical problem adopted is: the one-way damper is provided with an internal one-way bearing, the inner surface of the inner ring of the one-way bearing is provided with a key groove, the outer surface of the outer ring is not provided with a key groove, and the outside of the one-way bearing is provided with an elastic friction ring tightly hooped on the outer ring. Because the outer ring of the one-way bearing and the elastic friction ring form a friction pair, the outer surface of the outer ring is a smooth surface without a key groove.

A structure convenient for installing a damper is characterized in that a support ring tightly hooped on the elastic friction ring is further arranged outside the elastic friction ring.

Specifically, inner snap springs for blocking the end faces of the elastic friction rings from axially positioning the elastic friction rings are arranged in the rings at the two ends of the support ring.

In order to better axially position the elastic friction ring or the elastic friction ring and the one-way bearing outer ring and increase the area of a positioning contact surface, a fixing piece is further arranged between the inner snap spring and the end face of the elastic friction ring.

In order to facilitate circumferential positioning of the support ring, a key groove is formed in the outer surface of the support ring.

The one-way damper is pressed into an elastic friction ring made of friction materials on the basis of a traditional one-way bearing, so that the friction torque generated when the elastic friction ring and an outer ring of the one-way bearing rotate is far smaller than the allowable torque of the selected one-way bearing, and the elastic friction ring can be directly fixed in a mounting seat in the axial direction and the circumferential direction when the one-way damper is used.

The damper is further provided with the support ring, the inner clamp spring and the fixing piece so as to further improve the structure of the damper, the damper is more convenient to use and mount, and the structure of the damper mounting seat can be relatively simple.

The utility model has the advantages that: the utility model discloses compare with two-way damping device, one-way attenuator is out of work during axle corotation, and the attenuator plays support bearing's effect, and the rotating resistance of axle is little, and one-way attenuator work when the axle reverses plays the damping effect, and the attenuator is not in damping operating condition all the time like this, has prolonged the life of attenuator, has reduced the power loss of system by a wide margin.

Drawings

The present invention will be further described with reference to the accompanying drawings and embodiments.

FIG. 1 is an exploded view of a structure of the present invention;

FIG. 2 is an overall view of the damper of FIG. 1;

FIG. 3 is a cross-sectional view of the damper of FIG. 2;

fig. 4 is a schematic view of the damper of fig. 1 applied to a linear actuator.

In the figure: 1. the one-way damper comprises a one-way bearing, 2, an elastic friction ring, 3, a support ring, 4, an inner clamp spring, 5, a fixing piece, 6, a driving gear, 7, a one-way damper box body, 8, a screw rod, 9 and a nut.

Detailed Description

The invention will now be further described with reference to the accompanying drawings. The drawings are simplified schematic diagrams only illustrating the basic structure of the present invention in a schematic manner, and thus show only the components related to the present invention.

A one-way damper is provided with an internal one-way bearing 1, wherein the inner surface of the inner ring of the one-way bearing 1 is provided with a key slot, and the outer surface of the outer ring is not provided with a key slot; the one-way bearing 1 has an elastic friction ring 2 tightly clamped on the outer ring, which is a simple structure of the utility model, and the elastic friction ring 2 needs to be fixed in the mounting seat when in use.

As shown in the attached figure 1, the utility model is further structured and additionally provided with a part support ring 3, an inner clamp spring 4 and a fixing piece 5;

the elastic friction ring 2 is also externally provided with a support ring 3 tightly hooped on the elastic friction ring 2, the rings at the two ends of the support ring 3 are internally provided with an inner clamp spring 4 for blocking the axial positioning of the end surface of the elastic friction ring 2 on the elastic friction ring 2, a fixing sheet 5 is also arranged between the inner clamp spring 4 and the end surface of the elastic friction ring 2, and the outer surface of the support ring 3 is provided with a key groove.

In order to facilitate the further understanding of the utility model, the attached figure 4 introduces the condition that the damper of the utility model is applied to the linear actuator of the lifting table, the rotary driving gear 6 drives the lead screw 8 to rotate through the spline shaft sleeve, the lead screw 8 drives the nut 9 to do linear motion, the damper is sleeved on the spline shaft sleeve, the damper is fixed by the inner and outer check rings, the inner check ring is fixed with the transmission shaft, the outer check ring is fixed with the one-way damper box body, when the system does the lifting action, the device is used as the common needle bearing, and no damping is generated; when the system descends, the allowable reaction torque of the one-way bearing is far greater than the friction torque between the friction ring and the bearing outer ring, so that the bearing inner ring, the bearing outer ring and the friction ring rotate relatively first and play a role in damping, and the problem of damping failure after the traditional one-way bearing rotates continuously in the reverse direction is avoided. Compared with a bidirectional damping device, the novel unidirectional damper does not work in the ascending process, only plays a damping effect when descending, prolongs the service life, and greatly reduces the loss of system thrust when ascending.

In addition, the elastic friction ring 2 in fig. 1 to 3 is pressed between the one-way bearing 1 and the support ring 3, the friction pair between the elastic friction ring 2 and the one-way bearing 1 and the friction pair between the elastic friction ring 2 and the support ring 3 have smaller radius, and the maximum static friction moment generated is also smaller according to the moment principle, that is, when external torque is introduced, the elastic friction ring 2 and the one-way bearing 1 rotate relatively and the elastic friction ring 2 and the support ring 3 are stationary relatively.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable people skilled in the art to understand the contents of the present invention and implement the present invention, and the protection scope of the present invention can not be limited thereby, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. A one-way damper, characterized by: the bearing comprises an internal one-way bearing (1), wherein a key groove is formed in the inner surface of an inner ring of the one-way bearing (1), a key groove is not formed in the outer surface of an outer ring, and an elastic friction ring (2) tightly hooped on the outer ring is arranged outside the one-way bearing (1).

2. A one-way damper as claimed in claim 1, wherein: the elastic friction ring (2) is also externally provided with a support ring (3) tightly hooped on the elastic friction ring (2).

3. A one-way damper as claimed in claim 2, wherein: and inner snap springs (4) for blocking the end faces of the elastic friction rings (2) from axially positioning the elastic friction rings (2) are arranged in the rings at the two ends of the support ring (3).

4. A one-way damper as claimed in claim 3, wherein: and a fixing sheet (5) is also arranged between the inner snap spring (4) and the end face of the elastic friction ring (2).

5. A one-way damper as claimed in claim 2, wherein: the outer surface of the support ring (3) is provided with a key groove.