CN114033819A

CN114033819A - Light-load annular spring

Info

Publication number: CN114033819A
Application number: CN202111351338.8A
Authority: CN
Inventors: 周甲伟; 李冰; 巴涵; 郭小乐; 上官林建; 王星星; 李帅; 李立建; 范以撒; 闫翔宇; 郑泽冰; 王庆辉
Original assignee: North China University of Water Resources and Electric Power
Current assignee: North China University of Water Resources and Electric Power
Priority date: 2021-11-16
Filing date: 2021-11-16
Publication date: 2022-02-11
Anticipated expiration: 2041-11-16
Also published as: CN114033819B

Abstract

A light-load annular spring comprises an inner ring and an outer ring which are sleeved in sequence from inside to outside; a plurality of elastic pieces are circumferentially distributed between the inner ring and the outer ring; the lower end of the inner ring is a conical end of the conical surface of the outer wall and is sleeved in the outer ring; the middle part of the elastic sheet is provided with an inward bend; the upper bending section is tightly attached to the outer wall of the conical end; the inner wall of the outer ring is provided with card slots with the same number as the elastic sheets; the lower bending section is pressed in the card slot. The radial force borne by the inner ring is equally divided by the elastic sheets; the elastic pieces distributed circumferentially counteract radial loads by means of inward bending so as to perform radial buffering; the invention replaces the prior art extension springs and connecting springs with individual circumferentially distributed spring blades for radial damping under light loads.

Description

Light-load annular spring

Technical Field

The invention relates to the technical field of spring buffering, in particular to a light-load annular spring.

Background

The annular spring is composed of an extension spring and a connecting spring, and is shown in the attached figure 1 of the specification; the screw pitch and the screwing direction of the extension spring and the connecting spring are the same, one end of the extension spring is clamped by using a special tire clamp and screwed into the connecting spring, the other end of the extension spring is sleeved into the other end of the connecting spring after being rotated, and the connecting spring is screwed into the extension spring by utilizing the rotating force and forms an annular spring by the extension spring. The extension spring is washer-shaped spring steel with an inner cylindrical surface and an outer conical surface; the connecting spring is washer-shaped spring steel with an inner conical surface and an outer cylindrical surface; under the action of axial load, the annular spring generates great normal pressure between the contact surfaces of the extension spring and the connecting spring, so that the diameter of the extension spring is reduced, and the diameter of the connecting spring is increased. The length of the spring is shortened due to the change of the diameters of the extension spring and the connecting spring; when the external force is removed, the spring is restored to the original size under the action of the elastic internal force because the taper angle of the contact surface of the extension spring and the connecting spring is larger than the friction angle. Annular springs are often used where space is limited and strong radial damping is required. If the tension spring is damaged or abraded, the whole tension spring does not need to be replaced, and only individual tension springs or connection springs which are scrapped need to be replaced, so that the tension spring is easy to repair and is economical. However, the annular spring in the prior art can be used only under the condition of heavy load, and cannot be used under the condition of light load.

Disclosure of Invention

The invention aims to solve the problems and provides a light-load annular spring.

The technical scheme of the invention is as follows: a light-load annular spring comprises an inner ring and an outer ring which are sleeved in sequence from inside to outside; a plurality of elastic pieces are circumferentially distributed between the inner ring and the outer ring; the inner ring is made of rigid material; the lower end of the inner ring is a conical end of the conical surface of the outer wall and is sleeved in the outer ring; the middle part of the elastic sheet is provided with an inward bend; the upper bending section is tightly attached to the outer wall of the conical end; the inner wall of the outer ring is provided with card slots with the same number as the elastic sheets; the lower bending section is pressed in the card slot.

Preferably, the lower end of the lower bending section is connected with a vertical section; the vertical section is tightly attached to the card slot.

Preferably, the upper end of the bent upper section is connected with an outward hook-shaped section; the hook-shaped section is closely matched with the outer ring at the position of the card slot.

Preferably, the outer ring is made of a rigid material.

Preferably, a fixing ring is further arranged; the fixing ring is sleeved in the outer ring and connected with the inner surface of the outer ring into a whole, and the lower section of the fixing ring is pressed and bent into the card slot.

Preferably, the fixing sheet ring is made of elastic material; the fixation ring is compressed and then sleeved into the outer ring.

The invention has the beneficial effects that: the light-load annular spring comprises an inner ring and an outer ring which are sequentially sleeved from inside to outside; a plurality of elastic pieces are circumferentially distributed between the inner ring and the outer ring; the lower end of the inner ring is a conical end of the conical surface of the outer wall and is sleeved in the outer ring; the middle part of the elastic sheet is provided with an inward bend; the upper bending section is tightly attached to the outer wall of the conical end; the inner wall of the outer ring is provided with card slots with the same number as the elastic sheets; the lower bending section is pressed in the card slot. The radial force borne by the inner ring is equally divided by the elastic sheets; the elastic pieces distributed circumferentially counteract radial loads by means of inward bending so as to perform radial buffering; the invention replaces the prior art extension springs and connecting springs with individual circumferentially distributed spring blades for radial damping under light loads.

Drawings

FIG. 1 is a cut-away perspective view of a prior art annular spring;

FIG. 2 is a cut-away perspective view of the light-duty ring spring of the present invention;

FIG. 3 is a perspective view of the light duty ring spring of the present invention;

FIG. 4 is a perspective view of the outer ring;

FIG. 5 is a front view in half section of the inner ring;

FIG. 6 is a front view of the elastic sheet;

FIG. 7 is a perspective view of a cone end of a fixation ring;

in the figure: 01. the spring comprises an extension spring, 02, a connecting spring, 1, an inner ring, 11, a conical end, 2, an outer ring, 21, a card slot, 3, an elastic sheet, 31, a bend, 32, a bend upper section, 33, a bend lower section, 34, a hook section, 35, a vertical section and 4, a fixing sheet ring.

Detailed Description

The first embodiment is as follows: referring to fig. 2-6, a light-load ring spring includes an inner ring and an outer ring sleeved in sequence from inside to outside; a plurality of elastic pieces are circumferentially distributed between the inner ring and the outer ring; the inner ring is made of rigid material and cannot generate elastic deformation when being subjected to radial load; the lower end of the inner ring is a conical end of the conical surface of the outer wall and is sleeved in the outer ring; the middle part of the elastic sheet is provided with an inward bend; the upper bending section is tightly attached to the outer wall of the conical end; the bending counteracts the radial load through elastic deformation; the radial force borne by the inner ring is equally divided by the elastic sheets; the elastic pieces distributed circumferentially can only counteract radial load by means of inward bending so as to perform radial buffering; the inner wall of the outer ring is provided with card slots with the same number as the elastic sheets; the lower bending section is pressed in the card slot; the screens groove is used for fixed flexure strip position, avoids single flexure strip drunkenness back and forth to guarantee the overall arrangement of circumference distribution.

The lower end of the lower bending section is connected with a vertical section; the vertical section is tightly attached to the card slot; the vertical section is more attached to the shape of the card slot, and the position of the elastic sheet is ensured to be fixed.

The upper end of the bent upper section is connected with an outward hook-shaped section; the hook-shaped section is closely matched with the outer ring at the card slot to form a state of being hooked on the outer ring; in this case, the hook section is also restricted by the card slot, and the position of the entire elastic piece is unchanged.

The outer ring is made of rigid material to form stable support for the elastic sheet.

The working principle of the embodiment is as follows: the inner ring bears the radial force to extrude the elastic sheet; the middle part of the elastic sheet is provided with an inward bend; the upper bending section is tightly attached to the outer wall of the conical end; at the moment, the outer wall of the conical end which is elastically deformed outwards extrudes the bent upper section, and the bending accumulates elastic force in a mode of increasing the included angle so as to perform damping and buffering on the radial light load.

In the second embodiment, referring to fig. 2 to 7, on the basis of the first embodiment, the light-load ring spring is further provided with a fixing ring; the fixing ring is sleeved in the outer ring and connected with the inner surface of the outer ring into a whole, the lower section of the pressing bending is arranged in the card slot, and the lower end of the elastic sheet is pressed from the inside to fix the position of the elastic sheet.

The fixing ring is made of elastic material; the fixing ring is compressed and then sleeved into the outer ring; therefore, the fixing sheet ring is pressed on the inner wall of the outer ring in a pre-tightening force state and matched with the card groove to limit the position of the elastic sheet and ensure the circumferential distribution of the elastic sheet.

Claims

1. A light-load annular spring is characterized by comprising an inner ring and an outer ring which are sequentially sleeved from inside to outside; a plurality of elastic pieces are circumferentially distributed between the inner ring and the outer ring; the inner ring is made of rigid material; the lower end of the inner ring is a conical end of the conical surface of the outer wall and is sleeved in the outer ring; the middle part of the elastic sheet is provided with an inward bend; the upper bending section is tightly attached to the outer wall of the conical end; the inner wall of the outer ring is provided with card slots with the same number as the elastic sheets; the lower bending section is pressed in the card slot.

2. The light-duty ring spring according to claim 1, characterized in that: the lower end of the lower bending section is connected with a vertical section; the vertical section is tightly attached to the card slot.

3. The light-duty ring spring according to claim 1, characterized in that: the upper end of the bent upper section is connected with an outward hook-shaped section; the hook-shaped section is closely matched with the outer ring at the position of the card slot.

4. A light duty ring spring according to any one of claims 1 to 3, wherein: the outer ring is made of rigid material.

5. The light duty ring spring according to any one of claims 1 to 4, wherein: a fixing ring is also arranged; the fixing ring is sleeved in the outer ring and connected with the inner surface of the outer ring into a whole, and the lower section of the fixing ring is pressed and bent into the card slot.

6. The light-duty ring spring according to claim 5, characterized in that: the fixing ring is made of elastic material; the fixation ring is compressed and then sleeved into the outer ring.