CN112145603A - A vehicle shock absorber, vehicle suspension structure and vehicle - Google Patents

Abstract

The invention is applicable to the technical field of vehicle structures, and discloses a vehicle shock absorber, a vehicle suspension structure and a vehicle. The vehicle shock absorber includes a cylinder, a damping valve, a piston rod and a vehicle attitude control valve, the vehicle attitude control valve is arranged in the cylinder, and the vehicle attitude control valve has a communication channel connected to both sides of the vehicle attitude control valve, so The vehicle attitude control valve is provided with a control member that moves and partially or completely blocks the communication passage when the acceleration of the vehicle in the set direction is greater than the set value, and a reset member is also set in the vehicle attitude control valve. A vehicle suspension structure and a vehicle have the above-mentioned vehicle shock absorber. The vehicle suspension structure can avoid the undesired pitching and rolling motion of the vehicle, improve the body control ability, and the driving quality is better, and the structure is simple and reliable, no complicated hydraulic and electronic control system is required, and the application cost is low and the failure rate is low.

Description

A vehicle shock absorber, vehicle suspension structure and vehicle

technical field

The invention belongs to the technical field of vehicle structures, and in particular relates to a vehicle shock absorber, a vehicle suspension structure and a vehicle.

Background technique

When the vehicle brakes, the load is transferred to the front axle, the front wheel is pressed toward the body, the shock absorber in the suspension structure at the front wheel is compressed, the rear wheel is pulled away from the body, and the shock absorber in the suspension structure at the rear wheel is compressed Pull, the body produces a nod angle; when the vehicle accelerates, the load is transferred to the rear axle, the rear wheel is pressed to the body, the front wheel is pulled away from the body, the body produces a lift angle; the nod angle and the lift angle are called the pitching motion of the body . When the vehicle turns, the load is transferred to the outer wheel, the outer wheel is pressed to the body, the shock absorber in the suspension structure at the outer wheel is compressed, the inner wheel is pulled away from the body, and the shock absorber in the suspension structure at the inner wheel is pulled , the body produces a roll angle, which is called roll motion. In order to ensure comfort, the relative vertical motion between the wheel and the body is relatively low stiffness, which leads to unwanted pitch and roll motion of the body.

In order to eliminate the rolling motion, the vehicle is generally equipped with a stabilizer bar, whose function is to connect the wheels on the left and right sides together, and reduce the relative movement of the left and right wheels during the roll through the stabilizer bar (outer compression, inner tension), so that To achieve the effect of controlling body roll. However, when one side of the suspension equipped with the stabilizer bar passes through the bump on the road, the stiffness of the vertical movement between the wheel and the body increases significantly, which is not conducive to ride comfort.

The pitching motion of the vehicle is difficult to control, and it is generally achieved by limiting the movement range between the wheel and the body, but this is not conducive to ride comfort. In order to eliminate the pitching motion, a small number of vehicles have added complex hydraulic or electronic control systems, which are costly , the failure rate is also high.

SUMMARY OF THE INVENTION

The present invention aims to solve at least one of the above-mentioned technical problems, and provides a vehicle shock absorber, a vehicle suspension structure and a vehicle, which can prevent the vehicle from generating undesired pitch and roll motions, improve the body control ability, and do not require complicated Hydraulic and electronic control system, low application cost and low failure rate.

The technical scheme of the present invention is: a vehicle shock absorber, comprising a cylinder, a damping valve and a piston rod, the damping valve is arranged in the cylinder, one end of the piston rod is connected to the damping valve, the The other end of the piston rod protrudes from one end of the cylinder, the cylinder is provided with a damping medium, and the damping valve is provided with a damping hole for the damping medium to flow through;

The vehicle shock absorber further includes a vehicle attitude control valve, the vehicle attitude control valve is arranged in the cylinder, the vehicle attitude control valve has a communication channel connected to both sides of the vehicle attitude control valve, the vehicle attitude control valve is The attitude control valve is provided with a control member that moves and partially or completely blocks the communication passage when the acceleration of the vehicle in the set direction is greater than the set value. A reset that resets the control when acceleration is removed.

Optionally, the vehicle attitude control valve includes a valve body with a valve cavity, the outer periphery of the valve body is in contact with the inner wall of the cylinder body, a first through hole is provided on one side of the valve body, and the valve body The other side of the body is provided with a second through hole, the first through hole and the second through hole are both connected to the valve cavity and form the communication channel, the control member is arranged in the valve cavity, the The reset pieces are respectively disposed on opposite sides of the control piece and abut against the control piece.

Optionally, a first limiting piece and a second limiting piece are threadedly connected or fixedly clamped in the valve cavity, and the first limiting piece and the second limiting piece are coaxially spaced apart from each other, and the The first limiting member has a first flow channel hole, the second limiting member has a second flow channel hole, the control member is arranged between the first limiting member and the second limiting member, and In the reset state, the control member has a gap with the valve cavity, the reset member includes a first spring and a second spring, and the first spring abuts against the first limiting member and a one of the control member. The second spring abuts against the second limiting member and the other side of the control member.

Optionally, the control member is spherical, or the control member is cylindrical and both ends are set as spherical surfaces.

Optionally, the valve body is in the shape of a disc, the valve cavity is arranged through the radial direction of the valve body, and the outer circumference of the valve body is sleeved with a sealing ring for sealing the end of the valve cavity , or, both ends of the valve cavity are provided with plugs for blocking the ends of the valve cavity.

Optionally, the vehicle attitude control valve is provided with one, and the movement direction of the control member in the vehicle attitude control valve is the same as the forward direction of the vehicle or perpendicular to the forward direction of the vehicle.

Optionally, there are two vehicle attitude control valves, the two vehicle attitude control valves are arranged up and down, and one of the vehicle attitude control valves is a pitch attitude control valve. The movement direction of the control member is the same as the forward direction of the vehicle, and the other vehicle attitude control valve is a roll attitude control valve, and the movement direction of the control member in the roll attitude control valve is perpendicular to the forward direction of the vehicle.

Optionally, the upper end of the piston rod passes through the upper end of the cylinder, the cylinder includes an outer cylinder and an inner cylinder, the inner cylinder is fixedly arranged in the outer cylinder, and the inner cylinder has an inner cylinder. There is an interlayer cavity between the outer cylinder and the inner cylinder, the damping valve and the vehicle attitude control valve are all arranged in the inner cavity, and the damping valve can slide along the axis of the inner cylinder , the vehicle attitude control valve is fixedly connected to the inner cylinder, the interlayer cavity is communicated with the inner cavity through a communication hole, and the communication hole is close to or located at the lower end of the inner cylinder, and the upper part of the interlayer cavity Set as compressed gas, the damping medium is set in the lower part of the interlayer cavity and the inner cavity, the damping valve, one or two of the vehicle attitude control valves are arranged in the inner cylinder at intervals up and down The inner cavity of the inner cylinder is divided into a plurality of sub-cavities, and the damping holes or the communication channels are arranged between adjacent sub-cavities.

The present invention also provides a vehicle suspension structure having the above-mentioned vehicle shock absorber.

Optionally, the vehicle suspension structure is a wishbone suspension structure, a double wishbone suspension structure, a multi-link suspension structure, a trailing arm suspension structure or a MacPherson suspension structure.

Optionally, the vehicle suspension structure includes a steering knuckle, a steering tie rod and a swing arm, the steering knuckle is respectively connected to the barrel of the vehicle shock absorber, the steering tie rod and the swing arm.

Optionally, the vehicle suspension structure further includes a stabilizer bar link and two ends of the stabilizer bar connected to the suspension structures on both sides of the vehicle, one end of the stabilizer bar link is rotatably connected to the cylinder, and the stabilizer The other end of the rod link is rotatably connected to the end of the stabilizer bar.

The present invention also provides a vehicle having the above-mentioned vehicle shock absorber.

The present invention provides a vehicle shock absorber, a vehicle suspension structure and a vehicle. A vehicle attitude control valve (including a roll attitude control valve or/and a pitch attitude control valve) is installed in the shock absorber. When the vehicle has a longitudinal acceleration (acceleration, braking) or lateral acceleration (steering), the roll attitude control valve and pitch attitude control valve can block the oil passage, limit the expansion and contraction of the shock absorber, when the vehicle brakes, accelerates or turns, the wheels and the body The relative vertical movement between the two is limited, and the vehicle posture does not change, so as to limit the relative vertical movement between the wheel and the body, to achieve the purpose of controlling the body movement, to avoid the vehicle from generating undesired pitch and roll movements, and to improve the Body control ability, good driving quality, simple and reliable structure, no need for complex hydraulic and electronic control systems, low application cost and low failure rate.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is a partial perspective schematic diagram of a vehicle suspension structure provided by an embodiment of the present invention;

2 is a schematic cross-sectional view of a vehicle shock absorber in a vehicle suspension structure provided by an embodiment of the present invention;

3 is a schematic cross-sectional view of a vehicle attitude control valve in a vehicle shock absorber provided by an embodiment of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

It should be noted that the terms "arrangement" and "connection" should be understood in a broad sense, for example, it may be directly arranged and connected, or indirectly arranged and connected through a central component or a central structure.

In addition, if there are "vertical", "horizontal", "length", "width", "thickness", "top", "bottom", "front", "rear", "left", " "Right", "vertical", "horizontal", "top", "bottom", "inside", "outside" etc. indicate the terms of orientation or positional relationship, which are based on the orientation or positional relationship shown in the drawings or conventional The placement state or the use state is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the structure, feature, device or element referred to must have a specific orientation or positional relationship, nor must it be constructed in a specific orientation and operation, and therefore should not be construed as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

Each specific technical feature and each embodiment described in the detailed description can be combined in any suitable manner under the circumstance that is not contradictory, for example, different specific technical features/embodiments can be combined to form different implementations In order to avoid unnecessary repetition, various possible combinations of specific technical features/embodiments in the present invention will not be described separately.

As shown in FIGS. 1 to 3 , a vehicle shock absorber 1 provided by an embodiment of the present invention includes a cylinder body 30 , a damping valve 10 and a piston rod 7 , and the damping valve 10 is arranged in the cylinder body 30 , The cylinder body 30 is provided with a damping medium, and the damping medium may be damping oil (hydraulic oil) or the like. The damping valve 10 is provided with a damping hole 15 for the damping medium to flow through. The outer circumference of the damping valve 10 is slidingly matched with the inner wall of the cylinder body 30 , that is, the damping valve 10 can slide along the axial direction of the cylinder body 30 , the damping valve 10 can be in the shape of a piston, and the damping medium flows through the damping hole 15 to realize vibration damping . One end of the piston rod 7 is connected to one side of the damping valve 10 , and the other end of the piston rod 7 protrudes from one end of the cylinder 30 .

The vehicle shock absorber 1 also includes a vehicle attitude control valve. The vehicle attitude control valve can be used with a pitch attitude control valve 11 and a roll attitude control valve 12 according to different installation directions. The pitch attitude control valve 11 and the roll attitude control valve 12 The structure is the same, only the installation direction is different. The vehicle attitude control valve is arranged in the cylinder body 30, the vehicle attitude control valve has a communication channel connected to both sides of the vehicle attitude control valve, and the vehicle attitude control valve is provided with When the acceleration in the set direction is greater than the set value, the control member 24 that moves and partially or completely blocks the communication passage is also provided in the vehicle attitude control valve to reset the control member 24 when the acceleration of the set direction is eliminated. the reset piece. When the acceleration of the vehicle in the set direction is greater than the set value, the control member 24 will move under the action of inertia and partially or completely block the communication channel, so that the movement of the damping valve 10 is blocked, thereby resisting a large amount of vehicle attitude The change can avoid the undesired pitch and roll motion of the vehicle, improve the control ability of the body, the driving quality is better, and the structure is simple and reliable, no complex hydraulic and electronic control system is required, the application cost is low, and the failure rate is low.

In this embodiment, the upper end of the piston rod 7 passes through the upper end of the cylinder 30 , the cylinder 30 includes an outer cylinder 8 and an inner cylinder 9 , the upper end of the outer cylinder 8 has an upper end cover 31 , and the lower end of the outer cylinder 8 There is a lower end cover 32, and the piston rod 7 is sealed through the upper end cover 31. The inner cylinder 9 is fixedly arranged in the outer cylinder 8 , the inner cylinder 9 has an inner cavity, and the upper end of the inner cylinder 9 can be sealedly connected (eg welded) to the inner side of the upper end cover 31 . The damping valve 10 and the vehicle attitude control valve are both arranged in the inner cavity, and the damping valve can slide along the axis of the inner cylinder 9, and the vehicle attitude control valve can be fixedly connected to the inner cylinder 9. That is, the outer side wall of the damping valve 10 and the inner side wall of the inner cylinder 9 can adopt a small interference fit, the damping valve 10 can slide along the axis of the inner cylinder 9, and the vehicle attitude control valve cannot slide along the axis of the inner cylinder 9. There is an interlayer cavity 13 between the outer cylinder 8 and the inner cylinder 9 , the interlayer cavity 13 communicates with the inner cavity through a communication hole 19 , and the communication hole 19 is close to or located at the lower end of the inner cylinder 9 , the upper part of the interlayer cavity 13 is set to compressed gas, the lower part of the interlayer cavity 13 and the inner cavity are provided with the shock absorption medium, that is, the upper part of the cylinder 30 except the interlayer cavity 13 is set to compressed gas ( high pressure gas), and the remaining cavities are filled with damping medium (damping oil). The vehicle attitude control valve is located between the communication hole 19 and the damper valve 10 . In this embodiment, the damping valve 10 is located above the vehicle attitude control valve, and the communication hole 19 is located below the vehicle attitude control valve.

Specifically, the vehicle attitude control valve includes a valve body 21 having a valve cavity 36 . Two sides of the valve body 21 are formed with sub-cavities, and the sub-cavities are filled with shock-absorbing medium. The shape of the vehicle attitude control valve is the same as that of the damping valve 10 . In the same way, the vehicle attitude control valve and the cylinder body 30 are fixedly connected, and the vehicle attitude control valve cannot slide along the axis of the cylinder body 30 . The outer periphery of the valve body 21 is in contact with the inner wall of the cylinder body 30 , a first through hole 27 is provided on one side (for example, the upper end surface) of the valve body 21 , and the other side (lower end surface) of the valve body 21 is provided with a first through hole 27 . A second through hole 28 is provided, the first through hole 27 and the second through hole 28 are both communicated with the valve cavity 36 and form the communication channel, and the damping medium can pass through the first through hole of the vehicle attitude control valve. 27 flows into the valve cavity 36 and flows out of the second through hole 28 , and the damping medium can also flow into the valve cavity 36 from the second through hole 28 of the vehicle attitude control valve and flow out of the first through hole 27 . The control member 24 is disposed in the valve cavity 36 , and the reset member is provided with two opposite sides of the control member 24 and abuts against the control member 24 to keep the valve cavity 36 unobstructed. . The diameter of the valve cavity 36 may be larger than the outer dimension of the control member 24, and the reset member may be an elastic member. The acceleration a of the vehicle in the set direction, the mass of the control part 24 is m, the force on the control part 24 is F=m*a, when F is greater than the reset force of the reset part acting on the control part 24, the control part 24 will move along the valve cavity 36 moves in the set direction, so that the valve cavity 36 can be partially or completely blocked, so that when the damping oil flows through the valve cavity 36, the resistance increases sharply or the damping oil cannot flow through the valve cavity 36, so that the damping valve 10 The movement of the vehicle is suppressed and the vehicle attitude is controlled.

Specifically, a first limiting member 22 and a second limiting member 26 can be screwed or fixedly clamped in the valve cavity 36 , and the first limiting member 22 and the second limiting member 26 are coaxially facing each other. The first limiting member 22 has a first flow channel hole 37, the second limiting member 26 has a second flow channel hole 38, and the first flow channel hole 37 and the second flow channel hole 38 are coaxially spaced opposite to each other. set up. The control member 24 is disposed between the first limiting member 22 and the second limiting member 26. When the control member 24 moves to the first flow channel hole 37, the first flow channel hole 37 can be closed. The flow channel is closed. When the control member 24 moves to the second flow channel hole 38, the second flow channel hole 38 can be closed, and the flow channel will also be closed at this time. Moreover, the control member 24 has a gap with the valve cavity 36 in the reset state, and the reset member includes a first spring 23 and a second spring 25, and the first spring 23 and the second spring 25 can be conical springs. The first spring 23 is against one side of the first limiting member 22 and the control member 24 , and the second spring 25 is against the other side of the second limiting member 26 and the control member 24 . side.

In a specific application, the control member 24 may be spherical, or the control member 24 may be cylindrical and both ends of the control member 24 are spherical. In this embodiment, the control member 24 is a metal ball, for example, a steel ball is used as the sealing ball.

Specifically, the valve body 21 can be in the shape of a disc (piston shape), the valve cavity 36 is disposed through the radial direction of the valve body 21 , and the first limiting member 22 can be installed from both ends of the valve cavity 36 . and the second limiting member 26. In this embodiment, at least two ends of the valve cavity 36 are provided with internal threads, and the outer sides of the first limiting member 22 and the second limiting member 26 are provided with external threads that cooperate with the internal threads. The first limiting member 22 and the second limiting member 26 may be in the shape of bolts with axial openings. The outer circumference of the valve body 21 is sleeved with a sealing ring 20 for blocking the end of the valve cavity 36 , or, both ends of the valve cavity 36 are provided with plugs for blocking the end of the valve cavity 36 . head.

Specifically, one vehicle attitude control valve is provided, and the movement direction of the control member 24 in the vehicle attitude control valve is the same as or perpendicular to the advancing direction of the vehicle. The installation direction of the vehicle attitude control valve is the movement direction of the control member 24 , that is, the axis direction of the valve cavity 36 , and can also be defined as the axis direction of the first flow channel hole 37 and the second flow channel hole 38 . When the installation direction of the vehicle attitude control valve faces the front and rear direction of the vehicle, when the vehicle decelerates or accelerates rapidly, and the acceleration value is greater than the set value, the control member 24 will correspondingly move forward and backward to block the flow passage, thereby restricting the movement of the damping valve 10 , and then the nodding and head-up of the vehicle can be suppressed, and the comfort of driving and riding can be prevented from being affected by excessive changes in the vehicle posture. When the installation direction of the vehicle attitude control valve faces the left and right direction of the vehicle, when the vehicle turns too fast and the acceleration value is greater than the set value, the control member 24 will move left and right to block the flow passage, thereby restricting the movement of the damping valve 10 , and then the roll of the vehicle can be suppressed, and the comfort of driving and riding can be prevented from being affected by the excessive change of the vehicle posture.

Specifically, there are two vehicle attitude control valves, the two vehicle attitude control valves are arranged up and down, and one of the vehicle attitude control valves is the pitch attitude control valve 11 , and all of the pitch attitude control valves 11 are The movement direction of the control member 24 is the same as the forward direction of the vehicle, and the installation direction of the pitch attitude control valve 11 faces the front and rear direction of the vehicle, that is, the axis direction of the valve cavity 36 (the axis of the first flow channel hole 37 and the second flow channel hole 38 ). direction) is consistent with the front and rear direction of the vehicle, and the control member 24 can block the flow passage when the control member 24 moves back and forth relative to the preceding vehicle. Another vehicle attitude control valve is the roll attitude control valve 12 , and the movement direction of the control member 24 in the roll attitude control valve 12 is perpendicular to the forward direction of the vehicle. The installation direction of the roll attitude control valve 12 faces the left and right direction of the vehicle, that is, the axial direction of the valve cavity 36 (the axial direction of the first flow channel hole 37 and the second flow channel hole 38 ) is consistent with the left and right direction of the vehicle, and the control member 24 is opposite to the front. The circulation channel can be blocked when the vehicle moves left and right.

Specifically, the damping valve 10 and one or two of the vehicle attitude control valves are arranged in the inner cylinder 9 at intervals up and down, and the inner cavity of the inner cylinder 9 is divided into a plurality of sub-chambers, and the adjacent sub-chambers are divided into several sub-chambers. There is the damping hole 15 or the communication channel therebetween.

In this embodiment, taking two vehicle attitude control valves (one roll attitude control valve 12 and one pitch attitude control valve 11 ) as an example, the damping valve 10 , the pitch attitude control valve 11 , and the roll attitude control valve 12 are arranged at intervals up and down In the inner cylinder 9 of the cylinder body 30, a first sub-chamber 14 is formed between the upper end of the damping valve 10 and the upper end cover 31 of the cylinder body 30, and a second sub-chamber 16 is formed between the lower end of the damping valve 10 and the upper end of the pitch attitude control valve 11 , the third sub-chamber 17 is formed between the lower end of the pitch attitude control valve 11 and the upper end of the roll attitude control valve 12, the fourth sub-chamber 18 is formed between the lower end of the roll attitude control valve 12 and the lower end cover 32 of the cylinder 30, and the fourth sub-chamber 18 is formed. The sub-chamber 18 communicates with the interlayer cavity 13 between the outer cylinder 8 and the inner cylinder 9 through the communication hole 19 .

The first sub-chamber 14, the second sub-chamber 16, the third sub-chamber 17, and the fourth sub-chamber 18 are all filled with oil (shock-absorbing medium), the lower half of the interlayer chamber 13 is oil, and the upper half of the interlayer chamber 13 is a high pressure gas. When the piston rod 7 of the shock absorber 1 expands and contracts, the oil between the first sub-chamber 14 and the second sub-chamber 16 flows through the damping hole 15 in the damping valve 10 of the shock absorber 1 . At the same time, when the piston rod 7 of the shock absorber 1 expands and contracts, the volume of the piston rod 7 inside the shock absorber 1 is different. Taking compression as an example, the volume of the piston rod 7 in the inner cylinder 9 becomes larger, and the oil is sequentially transferred from the second sub-chamber. 16. The flow channel of the pitch attitude control valve 11, the third sub-chamber 17, the flow channel of the roll attitude control, the fourth sub-chamber 18, and the communication hole 19 flow into the interlayer cavity 13, and the interlayer cavity 13 accommodates the extruded oil The liquid and air pressure become larger, and the piston rod 7 is reversed when it is stretched.

When the vehicle is running normally, the oil on both sides of the pitch attitude control valve 11 communicates through the first through hole 27 and the second through hole 28 through the path shown in FIG. 3 , and the oil pressure in the second sub-chamber 16 and the third sub-chamber 17 Always consistent, the same is true for the roll attitude control valve 12, the oil pressure in the third sub-chamber 17 and the fourth sub-chamber 18 is always consistent, the piston rod 7 of the shock absorber 1 can be freely retracted, and the relative vertical direction between the wheel and the body Movement is not restricted.

The pitch attitude control valve 11 is installed along the direction in which the vehicle travels (the front and rear direction of the vehicle). When the vehicle accelerates or brakes: Due to the inertia of the control member 24 (sealing ball) in the pitch attitude control valve 11, the control member 24 moves forward or backward. sports. The longitudinal acceleration of the vehicle is a, the weight of the downward control member 24 is m, and the longitudinal force of the control member 24 at this time is F=ma. The force acts on the pitch control spring to deform it, and causes the control member 24 to contact and compress the first flow channel hole 37 and the second flow channel hole 38 to play a sealing effect, thereby cutting off the first flow channel hole 37 and the second flow channel hole 38 in FIG. 3 . An oil flow path from a through hole 27 to a second through hole 28 . At this time, the cavity spaces on both sides of the pitch attitude control valve 11 (the second sub-chamber 16 and the third sub-chamber 17) are separated, and the piston rod 7 of the shock absorber 1 cannot be stretched. The relative vertical movement between the bodies, that is, to limit the lifting and nodding movements of the bodies.

The roll attitude control valve 12 is installed along the left and right directions of the vehicle. When the vehicle turns: due to the inertia of the control member 24 (sealing ball) in the roll attitude control valve 12, the control member 24 moves left or right, so that the control member 24 and the control member 24 move to the left or right. The first flow channel hole 37 and the second flow channel hole 38 are contacted and pressed tightly to play a sealing role, thereby cutting off the oil flow path in the roll attitude control valve 12 . At this time, the cavity spaces on both sides of the roll attitude control valve 12 (the third sub-chamber 17 and the fourth sub-chamber 18 ) are separated, and the piston rod 7 of the shock absorber 1 cannot be stretched. At this time, the shock absorber 1 restricts the wheel The relative vertical movement with the body, that is, to limit the roll of the body.

This embodiment also provides a vehicle suspension structure, the vehicle suspension structure has the above-mentioned vehicle shock absorber 1, and a vehicle attitude control valve (including a roll attitude control valve) is installed in the shock absorber 1 12 or/and pitch attitude control valve 11) When the vehicle has longitudinal acceleration (acceleration, braking) or lateral acceleration (steering), the roll attitude control valve 12 or/and pitch attitude control valve 11 can block the oil passage , restricting the expansion and contraction of the shock absorber 1, thereby restricting the relative vertical movement between the wheel and the vehicle body, thereby restricting the pitch and roll movement of the vehicle. to improve body control.

Specifically, the vehicle suspension structure is a wishbone type suspension structure, a double wishbone suspension structure, a multi-link type suspension structure, a trailing arm type suspension structure or a MacPherson suspension structure and other suspensions with shock absorbers 1 structure.

Specifically, the vehicle suspension structure includes a steering knuckle 2 , a steering rod 3 and a swing arm 4 , and the steering knuckle 2 is respectively connected to the cylinder 30 of the vehicle shock absorber 1 , the steering rod 3 and the Swing arm 4.

Specifically, the vehicle suspension structure further includes a stabilizer bar link 5 and a stabilizer bar 6 whose ends are connected to the suspension structures on both sides of the vehicle, and one end of the stabilizer bar 6 link 5 is rotatably connected to the cylinder 30 , the other end of the connecting rod 5 of the stabilizer bar 6 is rotatably connected to the end of the stabilizer bar 6 . The swing arm 4 and the shock absorber 1, which play the role of motion guiding, connect the steering knuckle 2 and the body, and the steering knuckle 2 connects the wheels to the swing arm 4 and the shock absorber 1.

This embodiment also provides a vehicle, the vehicle has the above-mentioned vehicle shock absorber 1, or the vehicle has the above-mentioned vehicle suspension structure, so as to improve the control ability of the vehicle body.

In a vehicle shock absorber, a vehicle suspension structure and a vehicle provided by the embodiments of the present invention, a vehicle attitude control valve (including a roll attitude control valve 12 or/and a pitch attitude control valve 11) is installed in the shock absorber 1, When the vehicle has longitudinal acceleration (acceleration, braking) or lateral acceleration (steering), the roll attitude control valve 12 and the pitch attitude control valve 11 can block the oil passage, limit the expansion and contraction of the shock absorber 1, vehicle braking, When accelerating or turning, the relative vertical movement between the wheel and the body is limited, and the vehicle posture does not change, thereby limiting the relative vertical movement between the wheel and the body, achieving the purpose of controlling the movement of the body, and avoiding the unexpected occurrence of the vehicle. The pitch and roll motions are improved, the body control ability is improved, the driving quality is better, and the structure is simple and reliable, no complex hydraulic and electronic control systems are required, and the application cost is low and the failure rate is low.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements or improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (13)

1. A vehicle shock absorber, characterized in that it comprises a cylinder, a damping valve and a piston rod, the damping valve is arranged in the cylinder, one end of the piston rod is connected to the damping valve, and the piston The other end of the rod protrudes from one end of the cylinder, the cylinder is provided with a damping medium, and the damping valve is provided with a damping hole for the damping medium to flow through; The vehicle shock absorber further includes a vehicle attitude control valve, the vehicle attitude control valve is arranged in the cylinder, the vehicle attitude control valve has a communication channel connected to both sides of the vehicle attitude control valve, the vehicle attitude control valve is The attitude control valve is provided with a control member that moves and partially or completely blocks the communication passage when the acceleration of the vehicle in the set direction is greater than the set value. A reset that resets the control when acceleration is removed. 2 . The vehicle shock absorber according to claim 1 , wherein the vehicle attitude control valve comprises a valve body having a valve cavity, and the outer periphery of the valve body is in contact with the inner wall of the cylinder body, 2 . One side of the valve body is provided with a first through hole, and the other side of the valve body is provided with a second through hole, the first through hole and the second through hole are both connected to the valve cavity and form the communication The control member is disposed in the valve cavity, and the reset member is respectively disposed on opposite sides of the control member and abuts against the control member. 3 . The vehicle shock absorber according to claim 2 , wherein a first limiting member and a second limiting member are threadedly connected or fixedly clamped in the valve cavity, and the first limiting member is threaded. 4 . The positioning member and the second limiting member are arranged coaxially opposite to each other, the first limiting member has a first flow channel hole, the second limiting member has a second flow channel hole, and the control member is arranged on the first flow channel hole. Between a limiting member and the second limiting member, and the control member has a gap with the valve cavity in the reset state, the reset member includes a first spring and a second spring, the first spring Abutting against one side of the first limiting member and the control member, the second spring abuts against the other side of the second limiting member and the control member. 4 . The vehicle shock absorber according to claim 3 , wherein the control member is spherical, or the control member is cylindrical and has spherical surfaces at both ends. 5 . 5 . The vehicle shock absorber according to claim 3 , wherein the valve body is in the shape of a disc, the valve cavity is arranged to pass through along the radial direction of the valve body, and the outer circumference of the valve body A sealing ring for blocking the end of the valve cavity is sleeved, or, both ends of the valve cavity are provided with plugs for blocking the end of the valve cavity. 6. The vehicle shock absorber according to any one of claims 1 to 5, wherein the vehicle attitude control valve is provided with one, and the movement of the control member in the vehicle attitude control valve The direction is the same as the direction of travel of the vehicle or perpendicular to the direction of travel of the vehicle. 7 . The vehicle shock absorber according to claim 1 , wherein there are two vehicle attitude control valves, two vehicle attitude control valves are arranged up and down, and one of the vehicle attitude control valves The valve is a pitch attitude control valve, and the movement direction of the control member in the pitch attitude control valve is the same as the forward direction of the vehicle, and the other vehicle attitude control valve is a roll attitude control valve, and the roll attitude control valve The direction of movement of the controls described in is perpendicular to the forward direction of the vehicle. 8. The vehicle shock absorber according to any one of claims 1 to 7, wherein the upper end of the piston rod passes through the upper end of the cylinder, and the cylinder comprises an outer cylinder and an inner cylinder, the inner cylinder is fixedly arranged in the outer cylinder, the inner cylinder has an inner cavity, a sandwich cavity is arranged between the outer cylinder and the inner cylinder, the damping valve, the vehicle attitude control valve are arranged in the inner cavity, and the damping valve can slide along the axis of the inner cylinder, the vehicle attitude control valve is fixedly connected to the inner cylinder, and the interlayer cavity is communicated with the inner cavity through a communication hole , the communication hole is close to or located at the lower end of the inner cylinder, the upper part of the interlayer cavity is provided with compressed gas, the lower part of the interlayer cavity and the inner cavity are provided with the shock absorption medium, the damping medium The valve, one or two of the vehicle attitude control valves are arranged in the inner cylinder at intervals up and down, and the inner cavity of the inner cylinder is divided into a plurality of sub-chambers, and the damping hole or the communication channel. 9 . A vehicle suspension structure, characterized in that the suspension structure has a vehicle shock absorber according to any one of claims 1 to 8 . 10 . The vehicle suspension structure according to claim 9 , wherein the vehicle suspension structure is a wishbone type suspension structure, a double wishbone suspension structure, a multi-link type suspension structure, and a trailing arm type suspension structure. 11 . Structure or MacPherson suspension structure. 11 . The vehicle suspension structure according to claim 9 , wherein the vehicle suspension structure comprises a steering knuckle, a steering tie rod and a swing arm, and the steering knuckle is respectively connected to the shock absorber of the vehicle. 12 . the cylinder, the steering rod and the swing arm. 12 . The vehicle suspension structure according to claim 11 , wherein the vehicle suspension structure further comprises a stabilizer bar link and a stabilizer bar whose ends are connected to the suspension structures on both sides of the vehicle, and the stabilizer bar is 12 . One end of the rod link is rotatably connected to the cylinder body, and the other end of the stabilizer link is rotatably connected to the end of the stabilizer bar. 13. A vehicle, characterized in that the vehicle has a vehicle shock absorber according to any one of claims 1 to 8.

Images