CN-115675674-B - Hydro-pneumatic suspension system and crawler engineering vehicle

CN115675674BCN 115675674 BCN115675674 BCN 115675674BCN-115675674-B

Abstract

The invention relates to the technical field of engineering vehicle suspension systems and discloses an oil-gas suspension system and a crawler engineering vehicle, which comprise a front suspension cylinder, a middle suspension cylinder, a rear suspension cylinder, a front swing arm, a middle swing arm, a rear swing arm, a buffer cylinder, a tensioning cylinder, a brake arm and an eccentric shaft, wherein one ends of the front suspension cylinder, the middle suspension cylinder and the rear suspension cylinder are hinged with a frame, the other ends of the front suspension cylinder, the middle suspension cylinder and the rear suspension cylinder are respectively hinged with the front swing arm, the middle swing arm and the rear swing arm, a tensioning cylinder seat is fixedly connected with the rear of a cylinder barrel of the tensioning cylinder, the cylinder barrel of the buffer cylinder is arranged in the tensioning cylinder seat and can swing in the tensioning cylinder seat, the cylinder rod end of the buffer cylinder is hinged with the brake arm, and the cylinder rod end of the tensioning cylinder is hinged with the frame. The invention has the beneficial effects that the vibration generated during the high-speed running of the whole machine can be greatly attenuated, the comfort of the whole machine is improved, the crawler belt can be tensioned in real time during the high-speed running, the belt is not stripped and slipped, and the walking performance and the trafficability of the whole machine are ensured.

Inventors

WEI RAN
ZHAO MINGAN
YUAN LIANG

Assignees

徐工集团工程机械股份有限公司

Dates

Publication Date: 20260505
Application Date: 20221114

Claims (7)

1. The hydro-pneumatic suspension system is characterized by comprising a front suspension cylinder, a middle suspension cylinder, a rear suspension cylinder, a front swing arm, a middle swing arm, a rear swing arm, a buffer cylinder, a tensioning cylinder, a brake arm and an eccentric shaft, wherein one ends of the front suspension cylinder, the middle suspension cylinder and the rear suspension cylinder are hinged with a frame, the other ends of the front suspension cylinder, the middle suspension cylinder and the rear suspension cylinder are respectively hinged with the front swing arm, the middle swing arm and the rear swing arm, a tensioning cylinder seat is fixedly connected with a cylinder barrel of the tensioning cylinder, the cylinder barrel of the buffer cylinder is arranged in the tensioning cylinder seat and can swing in the tensioning cylinder seat, the cylinder rod end of the buffer cylinder is hinged with the brake arm, the cylinder rod end of the tensioning cylinder is hinged with the frame, the brake arm is hinged with the tensioning cylinder seat and can swing around a hinge point, and one end of the eccentric shaft is inserted into the tensioning cylinder seat and is fixedly connected with the tensioning cylinder seat, and the other end of the eccentric shaft is connected with the front swing arm and can rotate around the front swing arm; When the vehicle equipped with the suspension system is in a running state, the tensioning cylinder and the rear suspension cylinder are in a communication state, namely, when the rear suspension cylinder stretches out, the tensioning cylinder retracts, and the vehicle equipped with the suspension system realizes tensioning of the crawler; The hydraulic device comprises a tensioning cylinder, a front suspension cylinder, a rear suspension cylinder, a locking valve group, a third filling valve, a first filling valve, a second filling valve, a third filling valve and a fourth filling valve, wherein the locking valve group comprises two electromagnetic locking valves and a manual locking valve; The pistons of the rear suspension cylinder and the tensioning cylinder are provided with a plurality of damping holes; the tensioning cylinder is a plunger cylinder, a cylinder barrel and a cylinder rod of the tensioning cylinder are of mutually matched step-shaped structures, the cylinder rod of the tensioning cylinder is of a hollow structure, and damping holes are formed in the cylinder rod of the tensioning cylinder.
2. A hydrocarbon suspension system as defined in claim 1 further comprising a suspension control valve, said suspension control valve being connected to the rod chamber of the front suspension cylinder, said suspension control valve further being connected to the rodless chamber of the front suspension cylinder through a latching valve block.
3. The hydro-pneumatic suspension system of claim 1 further comprising a first accumulator, a second accumulator, and a third accumulator, wherein the first accumulator is coupled to the buffer cylinder, the second accumulator is coupled to the middle suspension cylinder, and the third accumulator is coupled to the tensioning cylinder and the rear suspension cylinder.
4. A hydrocarbon suspension system as defined in claim 1 including a fourth accumulator connected to the rodless cavity of the front suspension cylinder and a fifth accumulator connected to the rod cavity of the front suspension cylinder.
5. The hydro-pneumatic suspension system of claim 1 wherein the axes of the front suspension cylinder, the middle suspension cylinder and the rear suspension cylinder meet at a point.
6. The hydro-pneumatic suspension system of claim 1, wherein the tensioning cylinder base is provided with a buffer cylinder mounting base, an eccentric shaft mounting hole and a brake arm mounting hole in sequence, the buffer cylinder mounting base is connected with a cylinder barrel of the buffer cylinder, the eccentric shaft is matched with the eccentric shaft mounting hole, and the brake arm mounting hole is hinged with a hinge point on the brake arm.
7. A track engineering vehicle is characterized by comprising a suspension system, a track, guide wheels, a driving wheel and a fifth bogie wheel according to any one of claims 1-6, wherein the driving wheel drives a whole vehicle to walk through the track, a brake is arranged on a brake arm, the guide wheels are arranged on two sides of the brake, the track engineering vehicle further comprises two groups of bogie wheel brackets, namely a first bogie wheel bracket and a second bogie wheel bracket, the first bogie wheel bracket is hinged with the brake arm and the cylinder rod end of a buffer cylinder through a pin shaft, the second bogie wheel bracket is connected with the middle suspension cylinder through a middle swing arm, and the fifth bogie wheel is connected with a rear suspension cylinder through a rear swing arm.

Description

Hydro-pneumatic suspension system and crawler engineering vehicle Technical Field The invention relates to the technical field of engineering vehicle suspension systems, in particular to a hydro-pneumatic suspension system and a crawler engineering vehicle. Background At present, the crawler travelling mechanism is widely applied to engineering machinery and military vehicles, such as excavators, cranes, tanks and the like. The suspension system is an important component of the vehicle, is connected with the vehicle body and the traveling system, plays a role in damping and absorbing vibration impact generated during high-speed traveling, ensures the stability of the vehicle during high-speed traveling, and improves driving comfort. The advantages and disadvantages of the suspension system directly determine the working performance and the traveling performance of the vehicle. Currently, common track engineering vehicles have suspension systems which mostly adopt spring-damped balance trolleys or rubber semi-rigid suspensions, and the structures can only be applied to track vehicles with slower speeds. If the device is applied to a high-speed crawler engineering vehicle, the crawler is easy to take off and slip, and the posture, the rigid locking and the like of the whole machine cannot be adjusted. In addition, although some crawler engineering vehicles are also provided with tensioning cylinders, the response speed of the tensioning cylinders is low, and the tensioning cylinders cannot be suitable for high-speed crawler engineering vehicles. Disclosure of Invention Aiming at the problems of the defects in the prior art, the invention provides the hydro-pneumatic suspension system and the crawler engineering vehicle, which are suitable for the high-speed crawler engineering vehicle, can greatly attenuate the vibration generated when the whole machine runs at a high speed, improve the comfort of the whole machine, can tension the crawler in real time when the whole machine runs at the high speed, do not take off and skid, and ensure the walking performance and the trafficability of the whole machine. In order to achieve the above purpose, the present invention provides the following technical solutions: The invention provides an hydro-pneumatic suspension system which comprises a front suspension cylinder, a middle suspension cylinder, a rear suspension cylinder, a front swing arm, a middle swing arm, a rear swing arm, a buffer cylinder, a tensioning cylinder, a brake arm and an eccentric shaft, wherein one ends of the front suspension cylinder, the middle suspension cylinder and the rear suspension cylinder are hinged with a frame, the other ends of the front suspension cylinder, the middle suspension cylinder and the rear suspension cylinder are respectively hinged with the front swing arm, the middle swing arm and the rear swing arm, a tensioning cylinder seat is fixedly connected with a cylinder barrel of the tensioning cylinder, the cylinder barrel of the buffer cylinder is arranged in the tensioning cylinder seat and can swing in the tensioning cylinder seat, the cylinder rod end of the buffer cylinder is hinged with the brake arm, the brake arm is hinged with the frame through the cylinder rod end of the tensioning cylinder seat and can swing around a hinge point, and one end of the eccentric shaft is inserted into the tensioning cylinder seat and is fixedly connected with the tensioning cylinder barrel seat, and the other end of the eccentric shaft is connected with the front swing arm and can rotate around the front swing arm. Preferably, the cylinder barrel of the tensioning cylinder is welded on the cylinder barrel seat of the tensioning cylinder. With the combination of the first aspect, further, when the suspension system works, the tensioning cylinder and the rear suspension cylinder are in a communicating state, namely, when the rear suspension cylinder stretches out, the tensioning cylinder retracts, the vehicle provided with the suspension system realizes tensioning of the crawler, and when the tensioning cylinder stretches out, the rear suspension cylinder retracts, and the vehicle provided with the suspension system can still realize tensioning of the crawler. In combination with the first aspect, the suspension system further comprises a locking valve group, wherein the locking valve group comprises two electromagnetic locking valves and a manual locking valve, one end of one electromagnetic locking valve is connected with the tensioning cylinder, the other end of the electromagnetic locking valve is connected with the rear suspension cylinder through the manual locking valve, one end of the other electromagnetic locking valve is connected with a rodless cavity of the front suspension cylinder, the other end of the other electromagnetic locking valve is connected with a fourth accumulator of the manual locking valve and the rodless cavity of the front suspension cylinder, and a third fil