A suspension oil-gas cylinder with adjustable balance position and its single swing arm oil-gas suspension structure

Abstract

A suspension oil-gas cylinder with adjustable balance position and a single swing arm oil-gas suspension structure thereof, comprising an outer cylinder and an inner oil-gas cylinder installed in the outer cylinder, the outer cylinder being provided with a highest point detection sensor and a lowest point detection sensor for detecting the position of the inner oil-gas cylinder, the outer cylinder being provided with a long strip of variable balance detection port arranged along the axial direction of the outer cylinder between the highest point detection sensor and the lowest point detection sensor, the variable balance position detection sensor for detecting the position change of the inner oil-gas cylinder being provided in the variable balance detection port, the outer cylinder being further provided with a linear motion device, the variable balance position detection sensor being connected to the active end of the linear motion device, the linear motion device driving the variable balance position detection sensor to move within the range of the variable balance detection port, the present invention has a large adjustable stroke, and can stably travel at any height point within the stroke range, can locate the balance point according to demand, and level the entire vehicle at the new balance point, the implementation is simple, the leveling is reliable, and it is adapted to the new requirements for suspension put forward by vehicle development, and has broad application prospects in the future.

Description

Technical Field

[0001] The invention relates to a suspension oil-gas cylinder with adjustable balance position and a single swing arm oil-gas suspension structure thereof. Background Art

[0002] The suspension system is a general term for all the force-transmitting connection devices between the frame and the axle or wheel of a moving vehicle. It transmits the force and torque acting between the wheel and the frame, and buffers the impact force transmitted to the frame or body by the uneven road surface, attenuates vibration, and ensures smooth driving of the vehicle. The main function of the suspension system is to support the vehicle body and improve the ride feeling. The suspension system integrates multiple forces, determines the stability, comfort and safety of the car, and is one of the most critical components of modern cars.

[0003] Modern suspension systems are mainly divided into non-independent suspension and independent suspension. Non-independent suspension wheels are installed at both ends of an integral axle. When one wheel bounces, the other wheel also bounces accordingly, causing the entire vehicle body to vibrate or tilt. Independent suspension axles are divided into two sections, and each wheel is independently installed under the frame by a spring shock absorber. When one wheel bounces, the other wheel is not affected. The wheels on both sides can move independently, improving the stability and comfort of the car. As people's requirements for vehicle ride comfort and handling stability are getting higher and higher, non-independent suspension systems are tending to be eliminated.

[0004] With the development of technology, independent suspension has various forms, and shock absorber resistance and spring also have various forms. Hydro-pneumatic suspension is one of the suspension forms that has developed rapidly and widely used in recent years. With the continuous improvement of the load-bearing and off-road performance of large engineering vehicles and special vehicles, the hydro-pneumatic suspension meets the needs of various vehicles with its unique nonlinear characteristics, good shock absorption performance, large energy storage ratio and height adjustment.

[0005] The single swing arm suspension system, with its large-angle adjustment, can change the suspension height and vehicle wheelbase in a wide range. It performs well in off-road and climbing, and is currently used in many special off-road vehicles at home and abroad. Whether it is an independent suspension or a non-independent suspension, it is very important to maintain the balance of the vehicle. The balance of the vehicle can keep the vehicle running smoothly and avoid tilting, turning, and braking deviation.

[0006] The new requirements for independent suspension are that the travel range is adjustable, the performance of the suspension spring does not change much within the adjustable travel range, and flexible driving can be achieved within a certain adjustable travel range. However, the current adjustable suspension is generally used in specific occasions to adjust the travel: for example, for cars with air suspension, the suspension is lowered on one side or the whole vehicle when passengers get on and off the car; oil and gas suspension can only maintain the best performance in the middle position, and the lowest or highest position is rigid and low-speed short-term driving. Summary of the invention

[0007] The present invention overcomes the shortcomings of the above-mentioned technology and provides a suspension cylinder with a variable balance detection point. The balance point of this suspension cylinder can be changed as needed within a certain range, and the whole vehicle can be leveled at the new balance point. The present invention also proposes a single swing arm suspension structure using this suspension cylinder with adjustable balance position. This structure adopts a single swing arm structure, and with the help of the swing arm's stroke amplification, a smaller suspension cylinder stroke can obtain a larger range of overall suspension stroke, which solves the problem that the existing adjustable suspension has only one optimal vibration center, so that the swing arm can be adjusted over a large range. Within the adjustable balance position range, the elasticity and damping of the suspension cylinder remain substantially unchanged, and the overall suspension system can be leveled at a new balance point and travel flexibly.

[0008] A suspension oil cylinder with adjustable balance position includes an outer cylinder and an inner oil cylinder installed in the outer cylinder, the outer cylinder is installed with a highest point detection sensor and a lowest point detection sensor for detecting the position of the inner oil cylinder, the outer cylinder is provided with a strip-shaped variable balance detection port arranged along the axial direction of the outer cylinder between the highest point detection sensor and the lowest point detection sensor, the variable balance position detection sensor for detecting the position change of the inner oil cylinder is provided in the variable balance detection port, the outer cylinder is also provided with a linear motion device, the variable balance position detection sensor is connected to the active end of the linear motion device, and the linear motion device drives the variable balance position detection sensor to move within the range of the variable balance detection port. Due to the adoption of the above structure, by adjusting the position of the variable balance position detection sensor, the present invention can not only allow the suspension to be in the three positions of high, medium and low, but also can set more height positions according to needs, so that the suspension can be leveled and kept stable, and can be adapted to driving.

[0009] Two variable balance detection ports are symmetrically arranged on the outer cylinder, each variable balance detection port is provided with a variable balance position detection sensor, and the two variable balance position detection sensors are spaced 6mm-18mm apart along the axial direction of the outer cylinder.

[0010] The linear motion device includes an outer cylinder guide rail, a movable detection shell and a suspension balance point detection cylinder. The outer cylinder guide rail is fixed on the outer cylinder and arranged along the axial direction of the outer cylinder. The movable detection shell is installed on the outer cylinder guide rail, and the movable detection shell can move along the outer cylinder guide rail. One end of the suspension balance point detection cylinder is hinged on the outer cylinder, and the other end is hinged on the movable detection shell. The suspension balance point detection cylinder is provided with a stroke sensor, and the variable balance position detection sensor is fixed on the movable detection shell.

[0011] A single swing arm oil-gas suspension system includes the above-mentioned balance position adjustable suspension oil-gas cylinder, one end of the swing arm is hinged on the frame, and the other end is mounted with a wheel, one end of the balance position adjustable suspension oil-gas cylinder is hinged to the middle of the swing arm, and the other end is hinged to the frame. This structure adopts a single swing arm structure, and through the balance position adjustable suspension oil-gas cylinder, with the help of swing arm stroke amplification, a smaller suspension oil cylinder stroke can obtain a larger range of overall suspension stroke, which solves the problem that the existing adjustable suspension has only one optimal vibration center, making the swing arm adjustable over a large range, within the adjustable balance position range, the elasticity and damping of the suspension oil cylinder remain substantially unchanged, and the overall suspension system can be leveled at the new balance point and travel flexibly.

[0012] In summary, the device has a large adjustable stroke and can travel stably at any height point within the stroke range. It can locate the balance point according to demand and level the entire vehicle at the new balance point. It is simple to implement and the leveling is reliable. It adapts to the new requirements for suspension put forward by vehicle development and has broad application prospects in the future. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a stereoscopic diagram of the suspension oil cylinder with adjustable balance position according to the present invention.

[0014] Figure 2 The invention discloses an explosion-proof device for the linear motion of the oil cylinder of the suspension with adjustable balance position. Figure 1 .

[0015] Figure 3 The invention discloses an explosion-proof device for the linear motion of the oil cylinder of the suspension with adjustable balance position. Figure 2 .

[0016] Figure 4 The invention discloses an explosion-proof device for the linear motion of the oil cylinder of the suspension with adjustable balance position. Figure 3 .

[0017] Figure 5 It is a three-dimensional diagram of the single swing arm oil-gas suspension structure of the present invention.

[0018] Figure 6 It is the hydraulic principle diagram of the present invention.

[0019] In the attached drawings, 1. Suspension oil and gas cylinder with adjustable balance position, 2. Outer cylinder, 3. Highest point detection sensor, 4. Outer cylinder guide rail, 5. Suspension balance point detection cylinder, 6. Movable detection shell, 7. Frame, 8. Variable balance position detection sensor, 9. Variable balance detection port, 10. Inner oil and gas cylinder, 11. Wheel, 12. Swing arm, 13. Lowest point detection sensor, 21. Right detection cylinder reversing valve, 22. Two-way hydraulic lock, 23. Left detection cylinder reversing valve, 24. Left suspension valve, 26. Right suspension valve, 27. Suspension accumulator, 28. Left and right suspension oil and gas cylinders, 29. Rigid-flexible switching valve. DETAILED DESCRIPTION

[0020] The technical content of the present invention is now further described in conjunction with the accompanying drawings.

[0021] like Figures 1 to 4 As shown, a suspension oil cylinder with adjustable balance position includes an outer cylinder 2 and an inner oil cylinder 10 installed in the outer cylinder 2, the outer cylinder 2 is installed with a highest point detection sensor 3 and a lowest point detection sensor 13 for detecting the position of the inner oil cylinder, the outer cylinder 2 is provided with a long strip variable balance detection port 9 arranged along the axial direction of the outer cylinder 2 between the highest point detection sensor 3 and the lowest point detection sensor 13, the variable balance detection port 9 is provided with a variable balance position detection sensor 8 for detecting the position change of the inner oil cylinder 10, the outer cylinder 2 is also provided with a linear motion device, the linear motion device includes an outer cylinder guide rail 4, a movable detection shell 6 and a suspension balance The balance point detection cylinder 5, the outer cylinder guide rail 4 is fixed on the outer cylinder 2 and arranged axially along the outer cylinder 2, a movable detection shell 6 is installed on the outer cylinder guide rail 4, and the movable detection shell 6 can move along the outer cylinder guide rail, one end of the suspension balance point detection cylinder 5 is hinged on the outer cylinder 2, and the other end is hinged on the movable detection shell 6, the suspension balance point detection cylinder 5 is provided with a stroke sensor, the variable balance position detection sensor 8 is fixed on the movable detection shell, and the suspension balance point detection cylinder 5 drives the movable detection shell 6 to move along the outer cylinder guide rail, so that the variable balance position detection sensor 8 moves within the range of the variable balance detection port 9. Due to the adoption of the above structure, by adjusting the position of the variable balance position detection sensor, the present invention can not only allow the suspension to be in the three positions of high, medium and low, but also can set more height positions according to needs, so that the suspension can be leveled and kept stable, and can be adapted to driving.

[0022] Two variable balance detection ports 9 are symmetrically arranged on the outer cylinder of the device, and each variable balance detection port 9 is provided with a variable balance position detection sensor 8. The two variable balance position detection sensors are spaced 10mm apart along the axial direction of the outer cylinder, that is, there are two upper and lower variable balance position detection sensors at the balance position, which correspond to the valve values ​​of oil discharge and oil inlet control of the oil cylinder respectively. For example, when the rodless cavity is filled with oil from the lowest position and the suspension is lifted, the oil filling stops when the upper sensor senses it; at the same time, the suspension valve controls the oil discharge, and the oil discharge stops when the lower sensor senses it; this is repeated several times to determine that the oil cylinder has reached the balance position; the upper and lower variable balance position detection sensors at this balance position are arranged on the opposite sides of the oil cylinder, and the distance between them is set according to the cylinder diameter and the oil inlet flow rate. At the same time, the accuracy of the sensor and the reaction time of the oil inlet and outlet valves should be considered to ensure that the final leveling accuracy meets the requirements. 6-18mm is an empirically recommended range value for on-site debugging.

[0023] like Figure 6As shown, taking the operation of the suspension balance point detection cylinder 5 on one side as an example, S5 and S6 are the signal ends of the balance detection sensor in the suspension balance point detection cylinder 5, S9 is the signal end of the stroke sensor in the suspension balance point detection cylinder 5, and S7 and S8 are the signal ends of the highest point detection sensor 3 and the lowest point detection sensor 13 of the suspension oil and gas cylinder 1 with adjustable balance position. When working, the suspension balance point detection cylinder 5 moves, and according to the position signal fed back by the signal end S9 of the suspension balance point detection cylinder 5, the balance detection sensor following the movement of the suspension balance point detection cylinder 5 moves with the movement of the suspension balance point detection cylinder 5 and is positioned at the target value; the left suspension valve 4 and the right suspension valve 6 level the movement of the suspension oil and gas cylinder 1 with adjustable balance position, and the leveling position is determined by the leveling position sensors S5 and S6 on the suspension balance point detection cylinder 5 respectively; after the left suspension valve 4 and the right suspension valve 6 are leveled, the rigid-flexible switching valve 9 is energized;

[0024] like Figure 5 As shown, a single swing arm oil-gas suspension system includes the above-mentioned balance position adjustable suspension oil-gas cylinder, one end of the swing arm is hinged to the frame 7, and the other end is installed with a wheel 11, one end of the balance position adjustable suspension oil-gas cylinder 1 is hinged to the middle part of the swing arm 12, and the other end is hinged to the frame 7. This structure adopts a single swing arm structure, with an adjustable suspension oil cylinder at the balance position. With the help of the swing arm's stroke amplification, a smaller suspension cylinder stroke can obtain a larger range of overall suspension stroke, which solves the problem that the existing adjustable suspension has only one optimal vibration center, making the swing arm adjustable over a wide range. Within the adjustable balance position range, the elasticity and damping of the suspension cylinder remain roughly unchanged, and the overall suspension system can be leveled at the new balance point and travel flexibly. When used as a shock-absorbing and damping element, the wheels obtain a larger travel range and a wider ground adaptability range through the amplification effect of the swing arm. The single swing arm suspension does not have many connecting rod structures of the traditional suspension, and its passing performance is greatly improved. When the oil cylinder changes the balance position, the whole vehicle is leveled at the new balance point to achieve high-speed, low-center-of-gravity driving and off-road high-suspension driving.

[0025] The above is a preferred embodiment of the present invention, but those skilled in the art should understand that various changes made to the present invention in form and details without departing from the spirit and scope of the present invention as defined in the appended claims are within the scope of protection of the present invention.

Claims

1. A suspension oil-gas cylinder with adjustable balance position, comprising an outer cylinder barrel (2) and an inner oil-gas cylinder (10) installed in the outer cylinder barrel (2), characterized in that: The outer cylinder (2) is provided with a highest point detection sensor (3) and a lowest point detection sensor (13) for detecting the position of the inner oil and gas cylinder (10); the outer cylinder (2) is provided with a long strip-shaped variable balance detection port (9) arranged along the axial direction of the outer cylinder (2) between the highest point detection sensor (3) and the lowest point detection sensor (13); a variable balance position detection sensor (8) for detecting the position change of the inner oil and gas cylinder (10) is provided in the variable balance detection port (9); the outer cylinder (2) is also provided with a linear motion device; the variable balance position detection sensor (8) is connected to the movable end of the linear motion device; the linear motion device drives the variable balance position detection sensor (8) to move within the range of the variable balance detection port (9); The linear motion device comprises an outer cylinder guide rail (4), a movable detection shell (6) and a suspension balance point detection cylinder (5); the outer cylinder guide rail (4) is fixed on the outer cylinder (2) and arranged along the axial direction of the outer cylinder (2); the movable detection shell (6) is installed on the outer cylinder guide rail (4); the movable detection shell (6) can move along the outer cylinder guide rail (4); one end of the suspension balance point detection cylinder (5) is hinged on the outer cylinder (2) and the other end is hinged on the movable detection shell (6); the suspension balance point detection cylinder (5) is provided with a stroke sensor; and the variable balance position detection sensor (8) is fixed on the movable detection shell (6); Two variable balance detection ports (9) are symmetrically arranged on the outer cylinder (2), and each variable balance detection port (9) is provided with a variable balance position detection sensor (8). The two variable balance position detection sensors (8) are spaced 6mm-18mm apart along the axial direction of the outer cylinder (2); that is, there are upper and lower variable balance position detection sensors at the balance position, and the upper and lower variable balance position detection sensors correspond to the oil discharge and oil inlet control thresholds of the inner oil cylinder (10), respectively. The rodless cavity is filled with oil from the lowest position, and the suspension is lifted. When the upper variable balance position detection sensor senses it, the oil filling is stopped. At the same time, the suspension valve controls the oil discharge. When the lower variable balance position detection sensor senses it, the oil discharge is stopped. This is repeated several times to determine that the inner oil cylinder (10) has reached the balance position.

2. A single swing arm oil-gas suspension system, comprising the suspension oil-gas cylinder (1) with adjustable equilibrium position according to claim 1, characterized in that: One end of the swing arm (12) is hinged to the vehicle frame (7), and the other end is mounted with a wheel (11); one end of the balance position adjustable suspension oil cylinder (1) is hinged to the middle of the swing arm (12), and the other end is hinged to the vehicle frame (7).

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