a constant pressure spring

Abstract

The invention relates to the field of mechanical components, and specifically, to a constant-force spring, resolving a problem in which it is not possible to keep an elastic force of a conventional spring constant. The constant-force spring comprises a cylindrical main body (1) made up of an elastic material. The outer periphery of the main body is a concave surface (11) bending inwards at a middle section thereof in an axial direction. The inner periphery of the main body is a convex surface (12) bending outwards at a middle section thereof in an axial direction. When operated in a defined compression range, the constant-force spring can produce a constant elastic force.

Description

technical field [0001] The invention belongs to the technical field of mechanical components and relates to a constant pressure spring. Background technique [0002] Springs include metal springs, rubber springs, etc., wherein rubber springs refer to springs made of rubber materials, which are cylindrical and can generate elastic force through contraction when loaded, as disclosed in the Chinese utility model patent application (application number: 201320633372. A rubber spring, comprising a solid rubber inner core, the solid rubber inner core is provided with a coaxial central through hole, the outer side of the solid rubber inner core is provided with a cord layer, and the outer side of the cord layer is provided with a surface material layer , the rubber spring is still the same as the traditional metal spring, it can shrink when it is loaded, and as the shrinkage increases, the elastic force it produces also increases linearly, so the constant function of the elastic for...

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Problems solved by technology

[0002] Springs include metal springs, rubber springs, etc., wherein rubber springs refer to springs made of rubber materials, which are cylindrical and can generate elastic force through contraction when loaded, as disclosed in the Chinese utility model patent application (application number: 201320633372. A rubber spring, comprising a solid rubber inner core, the solid rubber inner core is provided with a coaxial central through hole, the outer side of the solid rubber inner core is provided with a cord layer, and the outer side of the cord layer is provided with a surface material layer , the rubber spring is still the same as the traditional metal spring, it can shrink when it is loaded, and as the shrinkage increases, the elastic force it produces also increases linearly, so the constant function of the elastic force cannot be realized. Of course, the constant pressure or Constant elastic force is similar to constant temperature in temperature, it does not mean absolute change, but fluctuates in a small range, and the fluctuation in this small range does not affect the use requirements

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