Electric pre-tightening device for triangular arms of passenger car

Abstract

The invention discloses an electric pre-tightening device for triangular arms of a passenger car. The electric pre-tightening device comprises a power part and a positioning part, wherein the power part comprises a special sleeve and a driving mechanism for driving the special sleeve to rotate; and the positioning part comprises a rotating disc, a rotating shaft, a positioning pin, a pressing device arranged on the rotating disc and a first working table arranged at the bottom of the rotating disc. According to the device, a small motor is used as a power source, ring-shaped nuts of the triangular arms are pre-tightened by amplifying the torque through a speed reducer; through the use of an electric device, manual operation is avoided, the labor intensity of workers is reduced, and the product quality is stabilized; and the rotating shaft, the rotating disc and the positioning pin are arranged, and the other end can be pre-tightened without clamping the triangular arms through the rotation of the rotating disc, so that the clamping time is shortened, one-time clamping and two-time fixing and locking are realized, and the working efficiency is improved.

Description

technical field [0001] The invention relates to the field of vehicle axle assembly, in particular to an electric pretensioning device for a triangular arm of a passenger car. Background technique [0002] At present, the front suspension of passenger cars mainly has two forms: leaf spring structure and air suspension structure, and the front suspension of air suspension structure is divided into bow beam structure and independent suspension structure. There are two types: one is the form of suspension system and axle assembly represented by ZF independent suspension, which can be directly installed on the frame without pre-installation after purchase by the vehicle manufacturer; the other is the suspension system and axle assembly. The axle is in the form of parts, and the vehicle manufacturer needs to be further pre-assembled before it can be installed on the frame after purchasing. [0003] In the front independent suspension structure used in some high-end passenger cars...

AI Technical Summary

Problems solved by technology

[0004] In this kind of independent suspension, the triangular arm is used as the main component. Since the outer diameter of the triangular arm ring nut is relatively large, the tightening torque must reach 650NM. There is no ready-made electric or pneumatic tool for arching. The length of the torque wrench is nearly two meters, so the manual operation is not only labor-intensive but also inefficient

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