CN112664597A

CN112664597A - Rotary diaphragm spring

Info

Publication number: CN112664597A
Application number: CN202011487440.6A
Authority: CN
Inventors: 俞珏; 黄礼浩; 周鋆峰; 费尚书; 郝圣桥; 柏文峰
Original assignee: AECC Aero Engine Control System Institute
Current assignee: AECC Aero Engine Control System Institute
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-04-16

Abstract

The invention discloses a rotary diaphragm spring which comprises an inner circular table, a balance spring and an outer circular table, wherein the outer circular table and the inner circular table are arranged concentrically; the invention has the advantages of high medium temperature resistance, strong oil hydraulic pressure resistance, long working life, small volume, large torque and the like, and can complete the power-off return-to-center function of a servo motor or a servo valve.

Description

Rotary diaphragm spring

Technical Field

The invention relates to the field of spring design, in particular to a rotary diaphragm spring.

Background

The rotation spring is a mechanical part which utilizes the elasticity of the rotation spring to generate rotation torque. The energy-saving device generates resistance to external rotation motion by storing and releasing angular energy in work, is used for controlling the motion of parts, relieving impact or vibration, storing rotation energy, side moment and the like, and is widely applied to the industries of electronics, automobiles, instruments and meters, aerospace, engineering machinery and the like.

Common rotational spring structures include a power spring, a balance spring, a torsion bar spring, a rubber torsion spring, and the like. The spiral spring and the hairspring are mostly used in clocks and watches, electrician side measuring instruments and household appliances and are fixed in a hinged mode, a pin mode, a punching rivet mode and the like. In order to adapt to working occasions, the two springs are large in size or small in centering force. The torsion bar spring is mostly used for railway vehicles and automobiles, and has large output force, long length and large volume. The rubber torsion spring is easy to process, large in damping, easy to install and increasingly widely applied in mechanical engineering, but is small in elastic modulus, and poor in high and low temperature resistance and oil resistance.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to provide a rotary diaphragm spring which has the advantages of long service life, high temperature resistance, high oil pressure resistance, small volume and high elasticity.

The technical scheme is as follows: the invention relates to a rotary diaphragm spring which comprises an inner circular table, a balance spring and an outer circular table, wherein the outer circular table and the inner circular table are arranged concentrically; the hairspring is formed by splicing a plurality of sections of semi-arcs, the centers of the semi-arcs are positioned on the same transverse shaft, the semi-arcs on two sides of the transverse shaft are connected at the position of the transverse shaft, and the semi-arc curves are tangent at the connecting position; the most inner side semicircle in the balance spring is connected with the outer wall of the inner circular truncated cone, and the most outer side semicircle in the balance spring is connected with the inner wall of the outer circular truncated cone.

Preferably, the center of the inner circular truncated cone is provided with an arch-shaped hole for connecting the rotating shaft.

Preferably, the outer edge circular truncated cone takes the circle center as the center of symmetry, and grooves for the rotation of the calipers are symmetrically formed in the outer wall of the outer edge circular truncated cone.

Preferably, the cross-sectional heights of the inner circular truncated cone and the outer circular truncated cone are both higher than those of the hairspring.

Preferably, the inner circular truncated cone, the hairspring and the outer circular truncated cone are made of spring steel and are integrally processed in a wire cutting or 3D printing mode.

Has the advantages that: the invention is processed integrally, so the volume is small and the cost is low; the spring center hairspring is formed by splicing eccentric semi-circular arcs, and the circular arc curves are tangent at the connecting part without stress concentration points, so that the service life is long; the spring is made of spring steel and can endure high oil pressure and high temperature.

Drawings

FIG. 1 is a perspective view of the present invention;

fig. 2 is a schematic structural diagram of the present invention.

Detailed Description

The invention is further illustrated with reference to specific examples.

As shown in fig. 1-2, the invention is in a disc shape as a whole and comprises an inner circular table 1, a balance spring 2 and an outer circular table 3, wherein the outer circular table 3 and the inner circular table 1 are arranged concentrically; the center of the inner circular truncated cone 1 is provided with an arch-shaped hole 5 which can be connected with a rotating shaft and rotates along with the rotating assembly in work; the outer edge round platform 3 is connected with the fixing component in a gluing mode, an interference mode or a thread mode and the like, the fixing component is kept fixed in the work process, meanwhile, the outer edge round platform 3 takes the circle center as a symmetry center, and grooves 4 for the rotation of the calipers are symmetrically arranged on the side edges.

The hairspring 2 is arranged between the inner circular truncated cone 1 and the outer circular truncated cone 3, the hairspring 2 is formed by splicing a plurality of sections of semi-circular arcs, the circle centers of the semi-circular arcs are arranged on the same transverse shaft 6, the semi-circular arcs on the two sides of the transverse shaft are connected at the position of the transverse shaft 6, and the semi-circular arc curves are tangent at the connecting position without stress concentration points; the innermost semicircle in the balance spring 2 is connected with the inner circular truncated cone 1, the outermost semicircle in the balance spring 2 is connected with the outer edge circular truncated cone 3, and meanwhile, the cross-sectional heights of the inner circular truncated cone 1 and the outer edge circular truncated cone 3 are higher than those of the balance spring 2, so that the balance spring 2 can be prevented from contacting other parts.

The invention adopts an integrated structure, uses spring steel, is processed and obtained by wire cutting or 3D printing, and has no connecting structures such as welding, riveting, pins and the like, so the volume is small, the cost is low, meanwhile, the length, the width and the height of the balance spring directly determine the rigidity of the spring, the required rigidity can be obtained by changing the size of the balance spring 2 during processing, and the requirements of high medium temperature, high oil liquid pressure, high service life requirement, large centering force and small volume in the power-off centering function of a servo motor or a servo valve and the like can be completely met.

Finally, it should be noted that: the described embodiments are only some embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Claims

1. A rotary diaphragm spring characterized by: the hairspring comprises an inner circular table (1), a hairspring (2) and an outer circular table (3), wherein the outer circular table (3) and the inner circular table (1) are arranged concentrically; the balance spring (2) is formed by splicing a plurality of sections of semi-arcs, the centers of the semi-arcs are positioned on the same transverse shaft (6), the semi-arcs on two sides of the transverse shaft (6) are connected at the position of the transverse shaft (6), and the semi-arc curves are tangent at the connecting positions; the most inner side semicircle in the balance spring (2) is connected with the outer wall of the inner circular truncated cone, and the most outer side semicircle in the balance spring (2) is connected with the inner wall of the outer circular truncated cone.

2. A rotary diaphragm spring according to claim 1, wherein: the center of the inner round platform (1) is provided with an arch-shaped hole (5) used for connecting a rotating shaft.

3. A rotary diaphragm spring according to claim 1, wherein: the outer edge round platform (3) takes the circle center as the symmetry center, and grooves (4) for the rotation of the calipers are symmetrically arranged on the outer wall.

4. A rotary diaphragm spring according to claim 1, wherein: the cross-sectional heights of the inner circular truncated cone (1) and the outer circular truncated cone (3) are higher than those of the hairspring (2).

5. A rotary diaphragm spring according to claim 1, wherein: the inner circular truncated cone (1), the hairspring (2) and the outer circular truncated cone (3) are made of spring steel and are integrally processed in a wire cutting or 3D printing mode.