CN-121973853-A - Off-highway dump truck and hinged chassis framework thereof

CN121973853ACN 121973853 ACN121973853 ACN 121973853ACN-121973853-A

Abstract

The invention discloses an off-highway dump truck and a hinged chassis framework thereof, which comprise a front frame, a front suspension system, a rear frame, a middle axle, a rear suspension system, a hinge device, a balance system and a steering cylinder, wherein the hinge device is assembled between the front frame and the rear frame, the front frame and the rear frame can all circumferentially rotate around the central axis of the hinge device so as to realize torsion decoupling between the rear frame and the front frame, the balance system is assembled between the rear frame, the middle axle and the rear axle and is used for transmitting loads of the middle axle and the rear axle to the rear frame through the balance system, and the steering cylinder is assembled between the front frame and the hinge device so as to form a preset angle between the front frame and the hinge device and realize steering function. According to the invention, the rigid frame is upgraded into the hinged frame structure, the movement of the front frame and the rear frame is not influenced mutually, the frame is not subjected to torsional load under the severe working condition of a mine, and the reliability of the structure can be improved.

Inventors

LI JINXI
ZHANG JIESHAN
ZHENG HAIBIN
QIAO KUIPU
QIN HONGYI

Assignees

徐州徐工矿业机械有限公司

Dates

Publication Date: 20260505
Application Date: 20260327

Claims (10)

1. An articulating chassis architecture for an off-highway dump truck, comprising: a front frame and a front axle and front suspension system assembled therewith; a rear frame and a middle axle, a rear axle and a rear suspension system assembled with the rear frame, the rear frame is assembled by a main frame and an auxiliary frame; The hinge device is assembled between the front frame and the rear frame, and the front frame and the rear frame can all circumferentially rotate around the central axis of the hinge device, so that torsional decoupling between the rear frame and the front frame is realized; the balance system is assembled among the rear frame, the middle axle and the rear axle and is used for transmitting the loads of the middle axle and the rear axle to the rear frame through the balance system; The steering oil cylinder is assembled between the front frame and the hinging device, so that a preset angle is formed between the front frame and the hinging device, and a steering function is realized.
2. The articulated chassis architecture for an off-highway dump truck of claim 1, wherein said articulation comprises a front connection base and a rear connection barrel; The connecting seat comprises a seat body, an upper hinge point and a lower hinge point which are fixed on the seat body and are oppositely arranged up and down, and a left support and a right support which are oppositely arranged left and right, wherein the upper hinge point and the lower hinge point are connected with the front frame through a pin shaft; The steering oil cylinder comprises a left steering oil cylinder and a right steering oil cylinder, the left steering oil cylinder is hinged between the front frame and the left support, the right steering oil cylinder is hinged between the front frame and the right support, the left steering oil cylinder and the right steering oil cylinder are alternately telescopic, and the front frame is pulled to form a corner between the front frame and the hinging device; The connecting cylinder comprises a cylinder body, a first shaft sleeve and a second shaft sleeve, wherein the first shaft sleeve and the second shaft sleeve are fixed on the radial peripheral surface of the cylinder body and are respectively positioned at the axial front part and the axial rear part of the cylinder body, the cylinder body is sleeved in the rear frame, circumferential rotation is realized between the rear frame and the cylinder body through the first shaft sleeve and the second shaft sleeve, and the hinging device is prevented from slipping from the rear frame through a locking nut arranged at the end part of the cylinder body on the same side as the second shaft sleeve.
3. The articulating chassis architecture for an off-highway dump truck of claim 1, wherein the balancing system comprises: The balance shaft comprises a connecting shaft, a left longitudinal pull rod support and a right longitudinal pull rod support which are rotatably supported at two ends of the connecting shaft in the length direction, and the connecting shaft is positioned below the rear frame and passes through the rear frame along the width direction of the rear frame; The left leaf spring is connected to the left longitudinal pull rod support through a bolt and a pressing block and can rotate around a connecting shaft along with the left longitudinal pull rod support, the front end of the left leaf spring is pressed on the left upper support of the middle axle, and the rear end of the left leaf spring is pressed on the left upper support of the rear axle; The right leaf spring is connected to the right longitudinal pull rod support through a bolt and a pressing block and can rotate around the connecting shaft along with the right longitudinal pull rod support, the front end of the right leaf spring is pressed on the right upper support of the middle axle, and the rear end of the right leaf spring is pressed on the right upper support of the rear axle.
4. An articulating chassis architecture for an off-highway dump truck according to claim 3, wherein the rear suspension system comprises a mid-axle suspension comprising: the left lower longitudinal pull rod is hinged between a left longitudinal pull rod support of the balance shaft and a left lower support of the middle axle; The right lower longitudinal pull rod is symmetrically arranged on the left lower longitudinal pull rod in a left-right manner and is hinged between a right longitudinal pull rod support of the balance shaft and a right lower support of the middle axle; The upper longitudinal pull rod is hinged between the middle longitudinal pull rod support of the main frame and the upper support of the middle axle; The tie rod is hinged between the middle tie rod support of the main frame and the upper support of the middle axle, and the tie rod and the axle center of the middle axle are in the same vertical plane.
5. An articulating chassis architecture for an off-highway dump truck according to claim 3, wherein the rear suspension system comprises a rear axle suspension comprising: the left lower longitudinal pull rod is hinged between a left longitudinal pull rod support of the balance shaft and a left lower support of the rear axle; The right lower longitudinal pull rod is symmetrically arranged on the left side and the right side of the left lower longitudinal pull rod, and is hinged between a right longitudinal pull rod support of the balance shaft and a right lower support of the rear axle; the upper longitudinal pull rod is hinged between the rear longitudinal pull rod support of the main frame and the upper support of the rear axle; the tie rod is hinged between the rear tie rod support of the main frame and the upper support of the rear axle, and the tie rod and the axle center of the rear axle are in the same vertical plane.
6. The articulating chassis architecture for an off-highway dump truck of claim 1, wherein the front suspension system comprises: The upper end of the left suspension cylinder is hinged with the left suspension cylinder upper bracket of the front frame, and the lower end of the left suspension cylinder is hinged with the left upper bracket of the front axle; the upper end of the right suspension cylinder is hinged with a right suspension cylinder upper bracket of the front frame, and the lower end of the right suspension cylinder is hinged with a right upper bracket of the front axle; The left lower longitudinal pull rod is hinged between a left longitudinal pull rod support of the front frame and a left lower support of the front axle; the right lower longitudinal pull rod is symmetrically arranged on the left lower longitudinal pull rod in a left-right mode and is hinged between a right longitudinal pull rod support of the front frame and a right lower support of the front axle; The upper longitudinal pull rod is hinged between a longitudinal pull rod support of the front frame and an upper support of the front axle; The tie rod is hinged between the tie rod support of the front frame and the upper support of the front axle, and the tie rod and the axle center of the front axle are in the same vertical plane.
7. The articulated chassis frame for an off-highway dump truck according to claim 1, wherein the main frame is composed of two longitudinal beams arranged side by side at a predetermined interval in the same plane and a plurality of middle cross beams fixedly connected with the two longitudinal beams, the longitudinal beams are of a groove structure, the middle cross beams are vertically arranged with the left and right longitudinal beams, and two ends of the length direction of the middle cross beams are riveted with middle cross beam connecting seats in the longitudinal beams by rivets; The auxiliary frame is arranged right above the main frame and consists of two longitudinal beams which are arranged side by side at a preset interval in the same plane and a plurality of middle cross beams fixedly connected with the two longitudinal beams; The reinforcing plate is attached to the lateral surfaces of the main frame and the auxiliary frame in the width direction, the lower side of the reinforcing plate is connected with the main frame through rivets or bolts, the upper side of the reinforcing plate is connected with the auxiliary frame through rivets or bolts, and the reinforcing plate enables the main frame and the auxiliary frame not to move in the horizontal direction; The connecting seat on the main frame and the connecting seat on the auxiliary frame are connected through rivets or bolts, so that the main frame and the auxiliary frame are prevented from moving in the up-down direction.
8. The articulated chassis architecture for an off-highway dump truck of claim 1, wherein the front frame comprises a frame body and a left suspension cylinder upper support, a right suspension cylinder support, a left longitudinal tie support, a right longitudinal tie support, a track rod support, an upper longitudinal tie support welded to the frame body; the front axle comprises an axle body, and an upper left bracket, an upper right bracket, a lower left bracket, a lower right bracket and an upper bracket which are connected with the axle body through bolts; The main frame comprises a frame body, a middle tie rod support which is connected with the frame body in a riveting way, a main frame body and a main frame body a middle longitudinal pull rod support, a rear transverse pull rod support and a rear longitudinal pull rod support; the middle axle comprises an axle body, and an upper left bracket, an upper right bracket, a lower left bracket, a lower right bracket and an upper bracket which are connected with the axle body through bolts; the rear axle comprises an axle body, and an upper left bracket, an upper right bracket, a lower left bracket, a lower right bracket and an upper bracket which are connected with the axle body through bolts.
9. The articulated chassis architecture for an off highway dump truck of claim 1, wherein said front axle, said center axle, and said rear axle have the same nominal load, wherein said front axle and said rear axle have forward drive input configurations, and wherein said center axle is a through drive configuration.
10. An off-highway dump truck, which is characterized in that: comprising the articulated chassis architecture of any of claims 1 to 9.

Description

Off-highway dump truck and hinged chassis framework thereof Technical Field The invention relates to an off-highway dumper and a hinged chassis framework thereof, belonging to the field of engineering machinery mining dumpers. Background The mining dumper is mine transportation equipment which is upgraded and evolved from the highway dumper, and compared with the common highway dumper, the most obvious appearance characteristic of the mining dumper is an ultra-wide frame and a container. The design reduces the center of gravity of the vehicle, enhances the lateral stability, enables the vehicle to safely run on rugged mine pavement, and simultaneously realizes larger loading capacity. The method is mainly used for transporting the ore, the stripped earth and stone and other materials between a mine stope and a dumping site, a crushing station or a short-distance highway transfer point. The core parts (such as an engine, a gearbox and an axle) of the engine are usually of general or reinforced type of a mature commercial vehicle or engineering machinery, so that the manufacturing cost of the engine is greatly reduced, and the engine has extremely high cost performance. The integral riveting frame and suspension adopted by the dumper are inherited to the highway dumper, and the design thought brings some inherent defects while controlling the cost: First, there is a short plate for structural durability. Continuous heavy load and severe impact under mine working conditions, especially under torsion working conditions, lead to the fact that the integral frame structure based on the improvement of the highway frame is more prone to metal fatigue, cracking or deformation. Second, comfort is a problem. The suspension system and the integrated frame have limited shock filtering capability on complex hollow pavement, and the driving comfort is affected. In addition, the front axle of the dump truck is a steering axle, the bearing capacity of the front axle is insufficient and is only half of that of a middle axle and a rear axle, and under the heavy load downhill working condition, the load is transferred to the front axle and can be seriously beyond the bearing capacity of the front axle to cause damage. The load of the steering axle is transferred to the chassis through the steering knuckle, the steering knuckle is complex in stress and extremely high in failure rate. Disclosure of Invention Aiming at the defects in the prior art, the invention provides a hinged chassis framework for an off-highway dump truck. The invention is realized according to the following technical scheme: in a first aspect, the present invention provides an articulating chassis architecture for an off-highway dump truck, comprising: a front frame and a front axle and front suspension system assembled therewith; a rear frame and a middle axle, a rear axle and a rear suspension system assembled with the rear frame, the rear frame is assembled by a main frame and an auxiliary frame; The hinge device is assembled between the front frame and the rear frame, and the front frame and the rear frame can all circumferentially rotate around the central axis of the hinge device, so that torsional decoupling between the rear frame and the front frame is realized; the balance system is assembled among the rear frame, the middle axle and the rear axle and is used for transmitting the loads of the middle axle and the rear axle to the rear frame through the balance system; The steering oil cylinder is assembled between the front frame and the hinging device, so that a preset angle is formed between the front frame and the hinging device, and a steering function is realized. In some embodiments, the hinging device comprises a front connecting seat and a rear connecting cylinder, the connecting seat comprises a seat body, an upper hinging point, a lower hinging point, a left support and a right support, wherein the upper hinging point, the lower hinging point, the left support and the right support are fixed on the upper portion, the lower hinging point, the left support and the right support are arranged on the lower portion, the upper hinging point, the lower hinging point, the left support and the right support are arranged on the upper portion, the lower hinging point, the front frame is connected with the upper portion through a pin shaft, the steering cylinder comprises a left steering cylinder and a right steering cylinder, the left steering cylinder is hinged between the front frame and the left support, the right steering cylinder is hinged between the front frame and the right support, the left steering cylinder and the right steering cylinder are alternately telescopic, the front frame is pulled to form a corner between the front frame and the hinging device, the connecting cylinder comprises a cylinder body, a first shaft sleeve and a second shaft sleeve are fixed on the radial peripheral surface of the cylinder body and are respectively positio