All-metal coupling capable of being used in narrow space

Abstract

A disclosed all-metal coupling capable of being used in the narrow space comprises a connecting piece, a sliding piece of a square structure and a clearance fit structure capable of compensating installation deviation between shafts. The connecting piece is composed of a connecting shaft and a connecting base plate, and the two shaft ends of the connecting shaft are connected with a driving shaft and the front face of the connecting base plate respectively; the clearance fit structure is composed of clamping grooves formed in the four corner areas of the sliding piece, two first protruding blocks symmetrically arranged on the back face of the connecting base plate and two second protruding blocks symmetrically arranged on the end face of the shaft end, facing the driving shaft, of the driven shaft; and the two clamping grooves in each diagonal line of the sliding piece are symmetrical, the two first protruding blocks are embedded into the two symmetrical clamping grooves, the two second protruding blocks are embedded into the other two symmetrical clamping grooves, the first protruding blocks are in clearance fit with the corresponding clamping grooves, and the second protruding blocks are in clearance fit with the corresponding clamping grooves. The coupling has the advantages of being capable of being applied to an axial narrow space, long in service life, low in maintenance cost and capable of connecting a driving shaft and a driven shaft which are large in shaft diameter difference.

Description

technical field [0001] The invention relates to a shaft coupling, in particular to an all-metal shaft coupling which can be used in a narrow space. Background technique [0002] Coupling refers to a device that connects two shafts or shafts and rotating parts, and rotates together during the transmission of motion and power, and does not disengage under normal conditions. Sometimes the coupling is also used as a safety device to prevent the connected parts from being subjected to excessive loads and play the role of overload protection. It can be widely used in lifting, engineering transportation, mines, petroleum, ships, coal, rubber, Torque is transmitted in the mechanical shafting of papermaking machinery and other heavy machinery industries. Couplings can be divided into high-pressure shock-absorbing rubber-type couplings, diaphragm-type couplings, plum-blossom-type couplings, bellows-type couplings, cross slider-type couplings, and rigid couplings according to differen...

AI Technical Summary

Problems solved by technology

However, the existing non-all-metal couplings have the problems of short service life and sensitivity to high temperature and high-pollution environments compared with all-metal couplings. The coupling includes a small metal bushing, a large metal bushing that matches the small metal bushing, and a non-metallic elastic body that is placed in the cavity formed by the cooperation of the small metal bushing and the large metal bushing. The body is easily disturbed by the working environment (high temperature, chemical and other high pollution environment that affects non-metallic materials), which will directly affect the service life

Some all-metal couplings also have the problem of limited service life, such as diaphragm couplings. Although they do not need lubrication and maintenance, they not only improve economic efficiency, but also have little environmental pollution, but the elasticity formed by several diaphragms The fatigue degree of the body is low and the durability is poor, which will directly affect the service life

In addition, the existing couplings still have the following problems: 1) There is a problem of long axial length. In order to facilitate the installation and maintenance of the coupling, it is currently mainly used for sufficient space between the drive shaft and the driven shaft. It is difficult to apply in the narrow axial space; 2) It is impossible to directly connect the drive shaft and the driven shaft with a large difference in shaft diameter

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