A suspension system for a vehicle that can be accurately retracted and positioned

Abstract

The application discloses a vehicle suspension system with accurate extension and positioning, which comprises an actuator, a suspension assembly and a flow control module. The actuator comprises a pull arm, a trailing arm assembly and a load wheel. The load wheel is installed at the tail end of the trailing arm assembly and can rotate flexibly. The head end of the trailing arm assembly is fixedly installed on a hinged shaft, and the hinged shaft is installed on a vehicle body and can pivot. One end of the pull arm is fixedly connected with the hinged shaft. The pull arm and the trailing arm assembly have an angle therebetween. The suspension assembly is used for adjusting the trailing arm, and the flow control module is used for accumulating pressure for the pressure accumulator of the suspension assembly. The application can meet the different vehicle height requirements in land and water driving conditions, and can accurately reduce the suspension height to meet the height limit index. The suspension system of the application can meet the index requirements and greatly improve the vehicle carrying capacity. The application also has the advantages of simple structure, high reliability and good maintainability.

Description

Technical Field

[0001] This invention relates to a vehicle suspension system that can be precisely deployed and positioned. Background Technology

[0002] Vehicle suspension is a crucial system, ensuring sufficient ground clearance during operation and damping and mitigating vehicle vibrations. It's essential for special vehicles to achieve retraction and extension capabilities, while also ensuring the vehicle doesn't exceed height limits or scrape the bottom when boarding landing ships. Currently, civilian vehicle suspensions are primarily of the transverse arm type with shock absorbers, which cannot meet the needs of adjusting vehicle attitude. Most special vehicles use torsion bar suspensions, ensuring a fixed ground clearance that is essentially unadjustable. While amphibious special vehicles use hydropneumatic suspensions, which allow for retraction and extension, they cannot precisely position the vehicle at any given ground clearance. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a suspension system that is simple in structure, highly reliable, and easy to maintain. This system not only meets the needs of special vehicles traveling at different heights on land, but also improves the vehicle's ability to cross obstacles on the ground and to precisely deploy and position itself over aerial obstacles with height restrictions.

[0004] The technical solution adopted in this invention is: a vehicle suspension system that can be precisely deployed and positioned, including an actuator, a suspension assembly, and a flow control module;

[0005] The actuator includes a pull arm, a trailing arm assembly, and a load-bearing wheel; the load-bearing wheel is installed at the rear end of the trailing arm assembly and can rotate flexibly; the front end of the trailing arm assembly is fixedly installed on a hinge shaft, which is mounted on the vehicle body and can pivot; one end of the pull arm is fixedly connected to the hinge shaft; there is an angle between the pull arm and the trailing arm assembly.

[0006] The suspension assembly includes a power telescopic cylinder, an S-shaped oil pipe, and an air pipe; one end of the power telescopic cylinder is hinged to the vehicle body, and the other end is hinged to the tie arm, with the accumulator fixed to the vehicle body; the high-pressure oil port of the accumulator is connected to the high-pressure oil port of the power telescopic cylinder through the S-shaped oil pipe, ensuring that the oil can flow between the rodless chamber of the power telescopic cylinder and the high-pressure oil chamber of the accumulator; one end of the air pipe is connected to the high-pressure air port of the power telescopic cylinder, and the other end is connected to the vehicle's compressed air system, ensuring that high-pressure air can flow between the rod chamber of the power telescopic cylinder;

[0007] The flow control module is connected to the accumulator and can store pressure for the accumulator.

[0008] The accumulator includes an accumulator cylinder, an oil-gas separator piston, an inflation valve, a ball valve, a push rod, a control piston, and a valve body; an inflation valve and a valve body are respectively installed at both ends of the accumulator cylinder; the oil-gas separator piston is placed inside the accumulator cylinder and can slide in the inner cavity of the accumulator cylinder; the cavity between the oil-gas separator piston and the inflation valve is a nitrogen cavity, and the cavity between the oil-gas separator piston and the valve body is a high-pressure oil cavity;

[0009] The valve body sidewall is provided with a locking oil port, an inlet / outlet oil port, and a high-pressure oil port; a ball valve is provided in the central hole of the valve body, the ball valve includes a valve seat, a valve sleeve, a ball, and a spring; the valve seat includes a small diameter part and a large diameter part, the small diameter part is located between the large diameter part and the accumulator cylinder; the small diameter part is placed in the central hole of the valve sleeve, and a sealing ring II is provided between the small diameter part and the central hole of the valve sleeve; the large diameter part of the valve seat and the valve sleeve are installed in the central hole of the valve body, and a sealing ring I is provided between the large diameter part, the valve sleeve, and the central hole of the valve body;

[0010] The valve seat has a stepped center hole with a ball at the stepped surface that seals the center hole. A pressure plate is located at the end of the center hole, with a hole communicating with the center hole. A spring is positioned between the ball and the pressure plate, pressing the ball firmly against the stepped surface of the center hole. A radial through-hole communicating with the center hole is located on the small-diameter portion, between the ball and the large-diameter portion. The high-pressure port is located near the accumulator cylinder, communicating with the center hole of the valve sleeve, and the valve seat can block the high-pressure port.

[0011] A control cylinder is provided at the end of the valve body away from the accumulator cylinder. The control cylinder is provided with a control port and a control piston is provided inside the control cylinder. The piston rod end of the control piston extends into the central hole of the valve seat. The locking port connects the cavity between the control cylinder and the valve seat. The inlet and outlet ports are set to correspond to the gap between the large diameter part and the valve sleeve.

[0012] The flow control module includes a shut-off solenoid valve, a flow meter, a control valve assembly, a lock-up accumulator, and a lock-up oil pipe. The inlet and outlet ports of the accumulator are connected to the supply port of the control valve assembly via pipelines. The shut-off solenoid valve and the flow meter are installed on the pipelines. The shut-off solenoid valve is located between the flow meter and the accumulator. The shut-off solenoid valve, the control valve assembly, and the lock-up accumulator are fixed to the vehicle body. The lock-up oil port of the lock-up accumulator is connected to the lock-up oil port of the accumulator via a lock-up oil pipe. The control oil port is connected to the control oil outlet of the control valve assembly via a control oil pipe.

[0013] Furthermore, it also includes a cooling retaining sleeve; the cooling retaining sleeve is installed on the vehicle body, and the accumulator cylinder is fixed inside the cooling retaining sleeve cavity. The accumulator cylinder and the cooling retaining sleeve form a certain cavity. After the coolant is added into the cavity, a cooling chamber is formed, which transfers the oil heat caused by vibration to the vehicle body.

[0014] Furthermore, the control valve assembly includes a retractable directional valve, a flow divider valve, a main oil supply pipe, a main oil return pipe, a lock-up oil supply pipe, a lock-up oil return pipe, and a lock-up directional valve;

[0015] The inlet of the diverter valve is fixedly connected to the main oil supply pipe. The two diverter ports of the diverter valve are respectively connected to the inlets of the retraction and release directional valve and the locking directional valve. The diverter valve, the retraction and release directional valve, and the locking directional valve are installed and fixed on the vehicle body. The retraction and release directional valve and the locking directional valve are three-position four-way directional valves. The two outlets of the locking directional valve are respectively connected to the inlet and return ports of the locking accumulator through the locking oil supply pipe and the locking oil return pipe. The two outlets of the retraction and release directional valve are the oil supply port and the control oil outlet of the control valve group.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. This invention is used to meet the needs of special vehicles traveling at different heights on land. It accurately calculates the amount of hydraulic oil charged and discharged into the cylinder under the pulse of the hydraulic oil flow meter, thereby improving the vehicle's ability to cross obstacles on the ground and in the air with height restrictions.

[0018] 2. When this invention is used on special vehicles, it can meet the different vehicle height requirements under land conditions, and when driving on landing ships on water, it can precisely lower the suspension height to meet the height limit of the boarding gate. Thus, the suspension system of this invention can achieve the target requirements while greatly improving the vehicle's load-bearing capacity.

[0019] 3. This invention can be applied not only to tracked vehicles but also to wheeled vehicles, and is applicable to different numbers of wheel systems; it has good adaptability.

[0020] 4. The present invention also has the advantages of simple device structure, high reliability and good maintainability. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 This is a schematic diagram of the actuator of the present invention on the vehicle body.

[0023] Figure 3 This is a schematic diagram of the actuator of the present invention after it is hidden in the vehicle body.

[0024] Figure 4 This is a schematic diagram of the suspension assembly of the present invention.

[0025] Figure 5 This is a schematic diagram of the accumulator structure of the present invention.

[0026] Figure 6 This is a partially enlarged schematic diagram of the accumulator structure of the present invention.

[0027] Figure 7 This is a schematic diagram of the flow control module of the present invention.

[0028] Figure 8 A schematic diagram of the control valve assembly of the present invention.

[0029] In the diagram: 1: Actuator; 2: Suspension assembly; 3: Flow control module; 101: Vehicle body; 102: Tie arm; 103: Right side plate; 104: Load-bearing wheel; 201: Support sleeve; 202: Power telescopic cylinder; 203: S-shaped oil pipe; 204: Accumulator; 205: Air pipe; 20401: Fixing sleeve; 20402: Accumulator cylinder; 20403: Oil-gas separator piston; 20405: Ball valve; 20406: Push rod; 20407: Control piston; 20408: Valve body; 301: Connecting pipe I; 302: Shut-off solenoid valve; 303: Connecting pipe II; 304: Flow meter; 305: Connecting pipe III; 306: Control valve assembly; 307: Lock-up accumulator; 308: Lock-up oil pipe; 30601: Control oil pipe; 30602: Retractable directional valve; 30603: Diverter valve; 30604: Main oil supply pipe; 30609: Main oil return pipe; 30607: Lock-up oil supply pipe; 30606: Lock-up oil return pipe; 30605: Lock-up directional valve. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0031] like Figure 1 A vehicle suspension system capable of precise deployment and positioning, comprising an actuator 1, a suspension assembly 2, and a flow control module 3.

[0032] like Figure 2-3 The actuator 1 also includes a vehicle body 101, a pull arm 102, a trailing arm assembly 103, and a load-bearing wheel 104. The load-bearing wheel 104 is mounted on the rear end of the trailing arm assembly 103 and can rotate flexibly. The front end of the trailing arm assembly 103 is fixedly mounted on a hinge shaft, which is mounted on the vehicle body and can pivot. One end of the pull arm 102 is fixedly connected to the hinge shaft; there is an angle between the pull arm 102 and the trailing arm assembly 103.

[0033] The suspension assembly 2 includes a support sleeve 201, a power telescopic cylinder 202, an S-shaped oil pipe 203, and an air pipe 205. The support sleeve 201 is fixedly mounted on the frame. One end of the power telescopic cylinder 202 is hinged to the support sleeve 201, and the other end is hinged to the pull arm 102. It can rotate around the support sleeve 201 during telescopic movement and can drive the pull arm 102 to rotate around its hinge axis with the vehicle body. The accumulator 204 is fixed to the vehicle body 101. The high-pressure oil port of the accumulator 204 is connected to the high-pressure oil port of the power telescopic cylinder 202 through the S-shaped oil pipe 203, ensuring that the oil can flow between the rodless chamber of the power telescopic cylinder 202 and the high-pressure oil chamber of the accumulator 204. One end of the air pipe 205 is connected to the high-pressure air port of the power telescopic cylinder 202, and the other end is connected to the vehicle's compressed air system, ensuring that high-pressure air can flow between the rod chamber of the power telescopic cylinder 202.

[0034] like Figure 5-6 The accumulator 204 includes a cooling retaining sleeve 20401, an accumulator cylinder 20402, an oil-gas separator piston 20403, a charging valve 20404, a ball valve 20405, a push rod 20406, a control piston 20407, and a valve body 20408. The cooling retaining sleeve 20401 is fixed to the vehicle body. The accumulator cylinder 20402 is fixed inside the cavity of the cooling retaining sleeve 20401, forming a certain cavity with the retaining sleeve 20401. After coolant is added, a cooling chamber 20411 is formed, which transfers the oil heat caused by vibration to the vehicle body 101.

[0035] An air charging valve 20404 and a valve body 20408 are respectively installed at both ends of the accumulator cylinder 20402. An oil-gas separator piston 20403 is placed inside the accumulator cylinder 20402 and can slide within its inner cavity. The cavity between the oil-gas separator piston 20403 and the air charging valve 20404 is a nitrogen chamber, and the cavity between the oil-gas separator piston 20403 and the valve body 20408 is a high-pressure oil chamber. The oil-gas separator piston 20403 ensures complete separation between the high-pressure oil chamber 20410 and the nitrogen chamber 20409. The air charging valve 20404 is used to fill the nitrogen chamber with nitrogen.

[0036] The valve body 20408 has a locking port 20412, an inlet / outlet port 20415, and a high-pressure port 20416 on its side wall; a ball valve 20405 is installed in the central hole of the valve body 20408. The ball valve 20405 includes a valve seat 20417, a valve sleeve 20418, a ball, and a spring; the valve seat includes a small-diameter portion and a large-diameter portion, with the small-diameter portion located between the large-diameter portion and the accumulator cylinder 20402; the small-diameter portion is placed in the central hole of the valve sleeve 20418, and a sealing ring II is provided between the small-diameter portion and the central hole of the valve sleeve 20418. The large-diameter portion of the valve seat 20417 and the valve sleeve 20418 are installed in the central hole of the valve body, and a sealing ring I is provided between the large-diameter portion, the valve sleeve, and the central hole of the valve body.

[0037] The valve seat 20417 has a stepped center hole with a ball at the stepped surface. The ball seals the center hole of the valve seat. A pressure plate is located at the end of the center hole of the valve seat, and the pressure plate has a hole communicating with the center hole of the valve seat. A spring 20420 is located between the ball 20419 and the pressure plate. The elastic force of the spring 20420 presses the ball 20419 tightly against the stepped surface of the center hole of the valve seat. A radial through hole communicating with the center hole of the valve seat is provided on the small diameter section. The radial through hole allows high-pressure oil entering through the inlet / outlet port 20415 to enter the center hole of the valve seat and then enter the accumulator cylinder 20402. The radial through hole is located between the ball and the large diameter section. The high-pressure oil port 20416 is located close to the accumulator cylinder 20402. The high-pressure oil port 20416 communicates with the center hole of the valve sleeve, and the valve seat can block the high-pressure oil port 20416.

[0038] A control cylinder 20413 is provided at the end of the valve body away from the accumulator cylinder 20402. The control cylinder 20413 is provided with a control port 20414. A control piston 20407 is provided inside the control cylinder 20413. The piston rod end of the control piston 20407 extends into the central hole of the valve seat, and the piston rod end is sealed with the central hole of the valve seat. The locking port 20412 connects the cavity between the control cylinder 20413 and the valve seat. The inlet and outlet ports 20415 are set to correspond to the gap between the large diameter part and the valve sleeve.

[0039] Ball valve 20405 can slide in valve body 20408 depending on the oil pressure at both ends. When high-pressure oil flows into the inlet and outlet ports, ball valve 20405 slides to the left, the spring is compressed, and the oil flows into the high-pressure oil chamber of accumulator 204. It can also flow into the rodless chamber of power telescopic cylinder 202 along S-shaped oil pipe 203. When high-pressure oil flows into the lock port, ball valve 20405 slides to the right, sealing the oil communication port between the high-pressure oil chamber of accumulator 204 and the rodless chamber of power telescopic cylinder 202, thereby ensuring that power telescopic cylinder 202 no longer extends or retracts, that is, the height of the vehicle bottom from the ground remains unchanged, and there is no shock absorption effect in this state. The control piston 20407 is fixedly connected to the push rod 20406. When high-pressure oil flows into the control port, it pushes the control piston 20407 and the push rod 20406 to move to the right, the spring is compressed, and the oil in the high-pressure oil chamber of the accumulator 204 pushes the ball valve 20405 to move to the left and flows out from the inlet and outlet oil ports.

[0040] like Figure 7-8 As shown, the flow control module 3 also includes connecting pipe I 301, shut-off solenoid valve 302, connecting pipe II 303, flow meter 304, connecting pipe III 305, control valve group 306, lockout accumulator 307, and lockout oil pipe 308. The control valve group 306 also includes control oil pipe 30601, retraction / release directional valve 30602, diverter valve 30603, main supply oil pipe 30604, main return oil pipe 30609, lockout supply oil pipe 30607, lockout return oil pipe 30606, and lockout directional valve 30605.

[0041] The inlet and outlet ports of the accumulator 204 are connected to the supply port of the control valve assembly 306 via pipelines. These pipelines consist of a connecting pipe I 301, a shut-off solenoid valve 302, a connecting pipe II 303, a flow meter 304, and a connecting pipe III 305 connected in series. The shut-off solenoid valve 302, the control valve assembly 306, and the locking accumulator 307 are fixed to the vehicle body 101. The locking port of the locking accumulator 307 is connected to the locking port of the accumulator 204 via a locking oil pipe 308; the control port is connected to the control oil outlet of the control valve assembly 306 via a control oil pipe 30601. When the flow meter 304 detects that the oil flowing into the accumulator 204 has reached the calculated value, it controls the shut-off solenoid valve 302 to change from normally open to closed, cutting off the continued flow of oil into the accumulator 204, thereby achieving precise positioning of the vehicle's ground clearance.

[0042] The inlet of the diverter valve 30603 is fixedly connected to the main oil supply pipe 30604. The two diverter ports of the diverter valve 30603 are respectively connected to the inlets of the retraction / expansion directional valve 30602 and the locking directional valve 30605. The diverter valve 30603, the retraction / expansion directional valve 30602, and the locking directional valve 30605 are mounted and fixed on the vehicle body 101. The retraction / expansion directional valve 30602 and the locking directional valve 30605 are three-position four-way directional valves. The two outlets of the locking directional valve 30605 are respectively connected to the inlet and return ports of the locking accumulator 307 through the locking oil supply pipe 30607 and the locking oil return pipe 30606. The two outlets of the retraction / expansion directional valve 30602 are the oil supply port and the control outlet port of the control valve assembly 306. The oil supply mechanism of control oil pipe 30601 and connecting pipe Ⅲ 305 is switched through the retraction valve 30602. The locking retraction valve 30605 switches the oil supply mechanism between the locking oil supply pipe 30607 and the locking oil return pipe 30606.

Claims

1. A vehicle suspension system capable of precise deployment and positioning, comprising an actuator, suspension components, and a flow control module; The actuator includes a pull arm, a trailing arm assembly, and a load-bearing wheel; the load-bearing wheel is installed at the rear end of the trailing arm assembly and can rotate flexibly; the front end of the trailing arm assembly is fixedly installed on a hinge shaft, which is installed on the vehicle body and can pivot. One end of the pull arm is fixedly connected to the hinge shaft; there is an angle between the pull arm and the trailing arm assembly; The suspension assembly includes a power telescopic cylinder, an S-shaped oil pipe, and an air pipe; one end of the power telescopic cylinder is hinged to the vehicle body, and the other end is hinged to the tie arm, with the accumulator fixed to the vehicle body; the high-pressure oil port of the accumulator is connected to the high-pressure oil port of the power telescopic cylinder through the S-shaped oil pipe, ensuring that the oil can flow between the rodless chamber of the power telescopic cylinder and the high-pressure oil chamber of the accumulator; one end of the air pipe is connected to the high-pressure air port of the power telescopic cylinder, and the other end is connected to the vehicle's compressed air system, ensuring that high-pressure air can flow between the rod chamber of the power telescopic cylinder; The flow control module is connected to the accumulator and can store pressure for the accumulator. The accumulator includes an accumulator cylinder, an oil-gas separator piston, an air charging valve, a ball valve, a push rod, a control piston, and a valve body; the air charging valve and the valve body are respectively installed at both ends of the accumulator cylinder. The oil-gas separator piston is placed inside the accumulator cylinder and can slide in the inner cavity of the accumulator cylinder. The cavity between the oil-gas separator piston and the charging valve is the nitrogen cavity, and the cavity between the oil-gas separator piston and the valve body is the high-pressure oil cavity. The valve body sidewall is provided with a locking oil port, an inlet / outlet oil port, and a high-pressure oil port; a ball valve is provided in the central hole of the valve body, the ball valve includes a valve seat, a valve sleeve, a ball, and a spring; the valve seat includes a small diameter part and a large diameter part, the small diameter part is located between the large diameter part and the accumulator cylinder; the small diameter part is placed in the central hole of the valve sleeve, and a sealing ring II is provided between the small diameter part and the central hole of the valve sleeve; the large diameter part of the valve seat and the valve sleeve are installed in the central hole of the valve body, and a sealing ring I is provided between the large diameter part, the valve sleeve, and the central hole of the valve body; The valve seat has a stepped center hole with a ball at the stepped surface that seals the center hole. A pressure plate is located at the end of the center hole, with a hole communicating with the center hole. A spring is positioned between the ball and the pressure plate, pressing the ball firmly against the stepped surface of the center hole. A radial through-hole communicating with the center hole is located on the small-diameter portion, between the ball and the large-diameter portion. The high-pressure port is located near the accumulator cylinder, communicating with the center hole of the valve sleeve, and the valve seat can block the high-pressure port. A control cylinder is provided at the end of the valve body away from the accumulator cylinder. The control cylinder is provided with a control port and a control piston is provided inside the control cylinder. The piston rod end of the control piston extends into the central hole of the valve seat. The locking port connects the cavity between the control cylinder and the valve seat. The inlet and outlet ports are set to correspond to the gap between the large diameter part and the valve sleeve. The flow control module includes a shut-off solenoid valve, a flow meter, a control valve assembly, a lock-up accumulator, and a lock-up oil pipe. The inlet and outlet ports of the accumulator are connected to the supply port of the control valve assembly via pipelines. The shut-off solenoid valve and the flow meter are installed on the pipelines. The shut-off solenoid valve is located between the flow meter and the accumulator. The shut-off solenoid valve, the control valve assembly, and the lock-up accumulator are fixed to the vehicle body. The lock-up oil port of the lock-up accumulator is connected to the lock-up oil port of the accumulator via a lock-up oil pipe. The control oil port is connected to the control oil outlet of the control valve assembly via a control oil pipe.

2. The vehicle suspension system with precise retraction and positioning according to claim 1, characterized in that: It also includes a cooling mounting sleeve; the cooling mounting sleeve is installed on the vehicle body, and the accumulator cylinder is fixed inside the cooling mounting sleeve cavity. The accumulator cylinder and the cooling mounting sleeve form a certain cavity. After the coolant is added into the cavity, a cooling chamber is formed, which transfers the oil heat caused by vibration to the vehicle body.

3. The vehicle suspension system with precise retraction and positioning according to claim 2, characterized in that: The control valve assembly includes a retractable directional valve, a flow divider valve, a main oil supply pipe, a main oil return pipe, a lock-up oil supply pipe, a lock-up oil return pipe, and a lock-up directional valve. The inlet of the diverter valve is fixedly connected to the main oil supply pipe. The two diverter ports of the diverter valve are respectively connected to the inlets of the retraction and release directional valve and the locking directional valve. The diverter valve, the retraction and release directional valve and the locking directional valve are installed and fixed on the vehicle body. The retraction and release directional valve and the locking directional valve are three-position four-way directional valves. The two outlets of the locking directional valve are respectively connected to the inlet and return ports of the locking accumulator through the locking oil supply pipe and the locking oil return pipe. The two outlets of the retraction and release directional valve are the oil supply port and the control oil outlet of the control valve group.

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