CN210067762U

CN210067762U - One-way acting rotary damper

Info

Publication number: CN210067762U
Application number: CN201822023775.7U
Authority: CN
Inventors: 罗涛
Original assignee: Changsha Weilian Precision Machinery Co Ltd
Current assignee: Changsha Weilian Precision Machinery Co Ltd
Priority date: 2018-12-04
Filing date: 2018-12-04
Publication date: 2020-02-14
Anticipated expiration: 2028-12-04

Abstract

The utility model discloses a rotatory attenuator of one-way effect, including casing, the transmission shaft of setting in the casing and the damping oil of encapsulation between casing and transmission shaft, the transmission shaft includes drive shaft and follower spindle, the follower spindle is located the casing inside and the follower spindle keeps away from the one end of casing and caves in and has a circular slot, interference fit has an one-way bearing in the circular slot, the transmission shaft passes through one-way bearing rotates with the follower spindle to be connected, and this attenuator plays one-way damping effect, and overall structure is reasonable, and intensity is big, can not lead to generating heat in the use and become invalid, long service life.

Description

One-way acting rotary damper

Technical Field

The utility model relates to a damping field, more specifically says that it relates to a rotary damper of single action.

Background

The damper is a device for slowing down mechanical vibration and consuming kinetic energy by utilizing damping characteristics, is widely applied to the industries of aerospace, aviation, war industry, guns, automobiles and the like, and also has application in the field of living and home furnishing, such as toilets, roller shutters, automobile object shading curtains and the like.

Can use the attenuator in the present rolling slats door, the present attenuator of being applied to in high-quality rolling slats door generally includes casing and inside transmission shaft, and the transmission shaft structure as an organic whole, under the effect of damping oil, two-way all has the damping action after it cooperates with the casing, and the operator drop-down rolling slats door is very arduous, and the transmission shaft structure as an organic whole in the present attenuator, generates heat easily and causes the inefficacy to yielding fracture.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a pull-down in-process at the rolling slats door is resistanceless, has the one-way effect rotary damper of resistance during the resilience.

In order to achieve the purpose, the method is realized by the following technical means: a unidirectional action rotary damper comprises a shell, a transmission shaft arranged in the shell and damping oil packaged between the shell and the transmission shaft, wherein the transmission shaft comprises a driving shaft and a follow-up shaft, the follow-up shaft is positioned in the shell, one end, far away from the shell, of the follow-up shaft is sunken to form a circular groove, a unidirectional bearing is arranged in the circular groove in an interference fit mode, and the transmission shaft is rotatably connected with the follow-up shaft through the unidirectional bearing.

The method is further optimized as follows: and a through groove which discharges bubbles in the damping oil and enables the damping oil to rapidly pass through in the rotating process is arranged on the outer wall of the follow-up shaft.

The method is further optimized as follows: an accommodating groove is formed in the outer wall of the follow-up shaft.

The method is further optimized as follows: the inner wall of the circular groove is vertically provided with a guide convex strip, the guide convex strip is provided with at least one strip at intervals around the circumferential wall of the circular groove, and the one-way bearing is provided with an embedded groove matched with the guide convex strip.

The method is further optimized as follows: an annular groove is formed in the outer wall of the follow-up shaft in a concave mode at one end close to the opening, and a sealing ring for preventing damping oil from leaking is matched in the annular groove.

The method is further optimized as follows: the casing opening part block is provided with a gland, the drive shaft include with one-way bearing interference fit's axle core, with gland alternate complex drive section and from the spacing piece of limiting in the gland after the drive section outer wall outwards extends, the drive shaft is spacing between gland and circular slot.

The method is further optimized as follows: the outer wall of casing is protruding around casing circumference interval in the opening part and is equipped with the card of triangle-shaped protruding, the gland be close to the one end of casing extend have with card protruding complex snap ring.

The method is further optimized as follows: and a tangent plane convenient for the mold to enter the glue is arranged on the limiting sheet.

Compared with the prior art, the utility model the advantage lie in: the transmission shaft is connected with the driven shaft through a one-way bearing by a driving shaft, so that the effect of one-way damping is achieved; an exhaust through groove is formed in the outer wall of the follow-up shaft, so that gas in the damping oil can be exhausted in time, and the running stability of the damper is improved; the outer wall of the follow-up shaft is provided with the containing groove, so that damping oil is also stored in the position of the damper after the damper is kept still for a period of time, and the running smoothness of the follow-up shaft is always kept, thereby increasing the running stability of the damper and prolonging the service life of the damper; the arrangement of the guide convex strips increases the strength of fixing the one-way bearing on one hand, and plays a role in guiding and facilitating installation on the other hand, and in addition, can play a role in dust prevention; set up behind the gland spacing drive shaft pine on the one hand and take off, on the other hand prevents that the foreign matter from getting into, and this attenuator plays one-way damping effect, and overall structure is reasonable, and intensity is big, can not lead to generating heat in the use and become invalid, long service life.

Drawings

FIG. 1 is an exploded view of a single-acting rotary damper in accordance with the present embodiment;

FIG. 2 is a top view of a single-acting rotary damper according to the present embodiment;

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

fig. 4 is an assembled isometric view of a single-acting rotary damper of the present embodiment.

In the figure, 1, a housing; 101. clamping convex; 2. a follower shaft; 201. an exhaust through groove; 202. a containing groove; 203. a ring groove; 204. a circular groove; 205. a guide convex strip; 3. a drive shaft; 301. a shaft core; 302. a drive section; 303. a limiting sheet; 304. cutting into noodles; 4. a one-way bearing; 401. caulking grooves; 5. a seal ring; 6. a gland; 601. a through hole; 602. a snap ring.

Detailed Description

The present invention will be described in more detail with reference to the following embodiments, which are illustrative only and are not limiting to the scope of the present invention.

Examples

A unidirectional acting rotary damper is disclosed, referring to fig. 1-4, comprising a shell 1, a transmission shaft arranged in the shell 1 and damping oil packaged between the shell 1 and the transmission shaft, wherein the shell 1 is made of PC or ABS (PC + ABS) plastic material, the transmission shaft comprises a driving shaft 3 and a follower shaft 2, the follower shaft 2 is arranged in the shell 1, an annular groove 203 is arranged on the outer wall of the follower shaft 2 near the opening of the shell 1, a sealing ring 5 for preventing the damping oil from leaking is matched in the annular groove 203, a circular groove 204 is recessed at one end of the follower shaft 2 near the opening of the shell 1, a unidirectional bearing 4 is in interference fit in the circular groove 204, the transmission shaft is rotationally connected with the follower shaft 2 through the unidirectional bearing 4, and the unidirectional bearing 4 can adopt a unidirectional bearing with the brand of Shangtai and the model of CSK40 PP.

In order to facilitate the assembly of the unidirectional bearing 4, the inner wall of the circular groove 204 is vertically provided with at least one guiding protruding strip 205, preferably, 2 guiding protruding strips 205 are symmetrically arranged around the circumferential wall of the circular groove 204, as shown in fig. 1, the unidirectional bearing 4 is provided with an embedded groove 401 matched with the guiding protruding strips 205, and after the guiding protruding strips 205 are arranged, on the one hand, the guiding effect is achieved when the unidirectional bearing 4 is installed, so that the installation is facilitated; on the other hand, the mounting strength is increased, the unidirectional bearing 4 is fixed with enough strength, and the function of preventing dust falling can be realized.

A gland 6 is clamped at the opening of the shell 1, specifically, triangular clamping protrusions 101 are convexly arranged on the outer wall of the shell 1 at intervals around the circumference of the shell 1 at the opening, as shown in fig. 1 and 4, a snap ring 602 matched with the clamping protrusions 101 extends from one end of the gland 6 close to the shell 1, a through hole 601 is arranged at the center of the gland 6, the driving shaft 3 of the scheme comprises a shaft core 301 in interference fit with an inner ring of the one-way bearing 4, a driving section 302 in penetrating fit with the through hole 601 of the gland 6 and a limiting sheet 303 which extends outwards from the outer wall of the driving section 302 and is limited in the gland 6, the driving shaft 3 is limited between the gland 6 and the circular groove 204, and the gland 6 is used for preventing foreign matters from entering and limiting the driving shaft 3 from slipping out of the one-way bearing 4; wherein, axle core 301 is made by the metal, and drive section 302 and spacing piece 303 are made by POM, and axle core 301 is pre-buried at drive section 302 internal integrated injection moulding, and the setting of drive shaft 3 can increase bulk strength, reduces process and assembly spare, reduces assembly error, still is provided with a tangent plane 304 on spacing piece 303, and the tangent plane 304 that glues is advanced to the convenient mould that sets up of this tangent plane 304 reduces the production degree of difficulty.

The outer wall of the follow-up shaft 2 is provided with a through groove 201 which discharges bubbles in the damping oil in the rotating process and enables the damping oil to pass through quickly, so that the damping effect can be played quickly.

Still be provided with a storage tank 202 on the outer wall of follow-up shaft 2, the setting of storage tank 202 can guarantee that follow-up shaft 2 is in the smooth state all the time, can also store some damping oil in storage tank 202 after a period of stewing, ensures that the attenuator can even running, prolongs the life of attenuator.

Due to the arrangement of the one-way bearing 4, the existing transmission shaft which is integrally arranged is changed into a combined shaft consisting of the driving shaft and the follow-up shaft, when the damper is arranged on the roller shutter door, when the rotating direction of the driving shaft 3 is the same as the rotating direction of the one-way bearing 4 (namely the roller shutter door pull-down direction), the driving shaft 3 can rotate rapidly in a labor-saving manner, and an operator can pull down the roller shutter door conveniently; when the rotation direction of drive shaft 3 is opposite with one-way bearing 4's rotation direction (promptly the rolling slats door upwards kick-backs), drive shaft 3 rotates with follow-up shaft 2 synchronization, under the effect of damping oil, play the damping effect, make the rolling slats door kick-back slowly, reduce the hard collision of rolling slats door, thereby play control noise and extension rolling slats door life's effect, after one-way bearing 4 was add to whole attenuator, can play one-way damped effect, moreover, the steam generator is reasonable in structure, and the intensity is big, can not lead to generating heat in the use and become invalid, long service life.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A unidirectional action rotary damper comprises a shell, a transmission shaft arranged in the shell and damping oil packaged between the shell and the transmission shaft, and is characterized in that the transmission shaft comprises a driving shaft and a follow-up shaft, the follow-up shaft is positioned in the shell, one end, far away from the shell, of the follow-up shaft is recessed to form a circular groove, a unidirectional bearing is arranged in the circular groove in an interference fit mode, and the transmission shaft is rotatably connected with the follow-up shaft through the unidirectional bearing.

2. A single-acting rotary damper in accordance with claim 1, wherein the outer wall of said follower shaft is provided with a through-groove for discharging air bubbles in the damping oil and allowing the damping oil to pass rapidly therethrough during the rotation.

3. A single-acting rotary damper as claimed in claim 2, wherein said follower shaft is provided with a receiving groove in an outer wall thereof.

4. A single-acting rotary damper as claimed in any one of claims 1 to 3, wherein said circular groove has guide ribs vertically formed on an inner wall thereof, said guide ribs being provided at least one circumferentially spaced around a circumferential wall of said circular groove, and said one-way bearing has an insertion groove fitted with said guide ribs.

5. A single-acting rotary damper as claimed in claim 4, wherein said outer wall of said follower shaft is recessed at an end thereof adjacent to said opening to form a ring groove, and said ring groove is fitted with a seal ring for preventing damping oil from leaking out.

6. A single-acting rotary damper as claimed in claim 5, wherein a gland is engaged with the opening of the housing, the drive shaft includes a shaft core in interference fit with the single-acting bearing, a driving section in insertion fit with the gland, and a stopper extending outwardly from an outer wall of the driving section and being confined in the gland, and the drive shaft is confined between the gland and the circular groove.

7. A single-acting rotary damper, as claimed in claim 6, wherein said outer wall of said housing is provided with triangular projections spaced circumferentially around said housing at said opening, and said gland has a snap ring extending from an end thereof adjacent said housing for engaging said projections.

8. A single-acting rotary damper, as claimed in claim 7, wherein said stop plate is provided with a cut surface to facilitate the feeding of the die with glue.