Coupler

Abstract

The invention discloses a coupler which comprises a drive block, a driven block and a connection portion used for connecting the drive block and the driven block. The drive block and the connection portion are detachably connected in a motion mutually limiting manner, and the connection portion and the driven block are detachably connected in a motion mutually limiting manner. The drive block and a motor output shaft are detachably connected in a motion mutually limiting manner, and the driven block and a worm shaft of a worm and gear reducer are detachably connected in a motion mutually limiting mode. The coupler is convenient to install, detachable and easy to operate. Due to the fact that a novel material is used, weight is light, the problem of a low reversing response speed of a coupler traditional structure is solved, meanwhile, manufacturing and assembling cost is reduced, and practicality is strong. The drive block and the driven block are identical in structure and simple in manufacturing technology, a mold can be formed in an injection mode at a time, and extra machining is not needed.

Description

technical field [0001] The invention relates to the field of mechanical transmission, in particular to a shaft coupling. Background technique [0002] A coupling is a mechanical part used to connect two shafts in different mechanisms so that they rotate together to transmit torque. [0003] The electric steering column generally adopts a booster mechanism composed of a worm gear reducer, and the booster motor and the worm gear reducer are connected by a coupling. [0004] figure 1 It shows the structural schematic diagram of the coupling that is commonly used to connect the output shaft of the power booster motor and the worm shaft of the worm gear reducer, as shown in figure 1 As shown, the coupling is made up of three parts: the active block 1 ', the damping pad 2' and the driven block 3'. Among them, the active block 1' is processed with four claw blocks, which are connected with the motor output shaft of the booster motor by means of spline press-fitting; the vibratio...

AI Technical Summary

Problems solved by technology

[0006] (1) Since both the active block 1' and the driven block 3' are connected to the corresponding shaft by means of interference fit, they cannot be disassembled;

[0007] (2) The manufacture of the active block 1' and the driven block 3' requires special tooling and fixtures, and the manufacturing process and assembly process are relatively complicated and the cost is high;

[0008] (3) Both the active block 1' and the driven block 3' are made of steel, and the moment of inertia is large, which has a great influence on the response speed of the coupling commutation

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