Dump Truck Rear Axle Suspension System

Abstract

A rear axle suspension system of a dumper comprises a rear frame and a plurality of rear wheel assemblies, wherein the total number of the rear wheel assemblies >= 4; more than two rear wheel assemblies are respectively arranged on each side of the frame; a rear suspension system is arranged between the rear frame and the rear wheel assemblies; the rear suspension system comprises a rear axle suspension device and a rear axle tie rod device; the rear axle tie rod assembly includes an upper yaw arm assemblies and a lower yaw arm assemblies; the number of the lower yaw arm assemblies is two andthe lower yaw arm assemblies are arranged symmetrically with respect to the upper yaw arm assemblies; the number of rear axle suspension assemblies is two and the rear axle suspension assemblies are arranged symmetrically with respect to the rear axle tie rod assemblies; and the force of the rear wheel assemblies is mainly transmitted to the rear frame through rear axle suspension cylinders on both sides of the rear axle tie rod assembly. In the rear axle suspension system of a dumper, the rear axle suspension cylinders are respectively arranged on both sides of the rear axle tie rod device, and are symmetrically arranged so as to be two-point supports for the rear wheel assembly, so that the force on the rear wheel assembly is more uniform and the stability is good, and the rear wheel assembly can be effectively prevented from rotating by the two suspension cylinders.

Description

technical field [0001] The invention relates to the field of dump trucks, in particular to a rear axle suspension system of a dump truck. Background technique [0002] In the Chinese patent application number 201410081634.4, the application date is 2014.3.7, and the publication date is 2014.5.21, a rear suspension system of a wide-body dump truck is disclosed, which belongs to the technical field of off-highway dump trucks; its characteristic is a balanced suspension bracket The traction frame, rear suspension cylinder, and transverse tie rod are connected to the frame to ensure that the balanced suspension can only move in the vertical direction, and the force received by the balanced suspension bracket is transmitted to the frame; Longitudinal tie rods, balance beams, front transverse tie rods, and rear transverse tie rods are connected with the balance suspension bracket to ensure that the force on the middle and rear axles can be transmitted to the balance suspension bra...

AI Technical Summary

Problems solved by technology

In this structure, the middle bridge, the rear axle, the front longitudinal tie rod, the rear longitudinal tie rod, the balance beam balance shaft, the front transverse tie rod, the rear transverse tie rod and the balance suspension bracket are an integral structure. Connected with the frame, after the wheels are installed on the middle axle and the rear axle, in order to be able to run on rough roads, the middle axle, rear axle, front longitudinal tie rod, rear longitudinal tie rod, balance beam, front transverse tie rod and rear transverse tie rod The tie rod must be able to rotate around the balance shaft at a certain angle. Therefore, on the same side of the frame, a suspension cylinder can be used to better adapt to the above working method, but the stability of one suspension cylinder is poor, and the suspension cylinder needs to have a larger load capacity; in addition, for the above suspension system, it is difficult to achieve the purpose of equal load on each wheel

[0003] In the application number 201510759900.9, a dump truck independent wheel rear suspension system is disclosed. The problems in this application are as follows: 1. The bearing has no external seal, and sand and rainwater can easily enter the inside of the bearing

2. The anti-rotation structure of the pin shaft is unreliable, and the pin shaft is easy to rotate

3. The positioning of the inner ring of the bearing is not good, and the retaining rings close to both ends of the inner ring are difficult to fix the inner ring of the bearing

In addition, the tie rod is I-shaped, and the four corners have the same bearing structure. The coaxiality of the two joint bearings on the same side is poor, which affects the service life of the bearings.

And this installation structure is difficult to disassemble

The longitudinal force of the entire tie rod structure is closely borne by the bearing, and the service life of the bearing is low

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