CN209083891U - Air suspension vibration damper with adjustable damping - Google Patents

Abstract

The utility model provides an adjustable damping shock absorber for air suspension, which comprises: a hydraulic cylinder, a piston rod and a hydraulic piston; wherein, one end of the piston rod is arranged outside the hydraulic cylinder, and the other end is arranged in the hydraulic cylinder and is connected with the hydraulic cylinder. The hydraulic piston is connected; the hydraulic cylinder is provided with a cylinder, and the cylinder is provided with a cylinder piston placed under the hydraulic cylinder and connected with the hydraulic cylinder, and the cylinder piston is slidably connected with the inner wall of the cylinder; the upper part of the hydraulic cylinder is provided with a dust-proof cylinder The cover is sleeved outside the cylinder and is slidably connected to the outer wall of the cylinder; the piston rod is worn through the dust cover to drive the hydraulic piston and the dust cover to slide along the axial direction of the hydraulic cylinder; the dust cover and the cylinder There are elastic pieces in between. The shock absorber provided by the utility model automatically adjusts the damping force of the shock absorber according to different road conditions, so as to improve the comfort and shock absorption effect of the whole vehicle, and expand the adaptable range of the road conditions of the vehicle.

Description

Damping adjustable shock absorber for air suspension

technical field

The utility model relates to the technical field of shock absorbers, in particular to a damping adjustable shock absorber for air suspension.

Background technique

The shock absorber is an essential part of a motor vehicle. Its structure affects the handling and comfort of the whole vehicle, and whether the performance is stable and reliable is directly related to the safety, reliability, comfort and handling of the whole vehicle. Existing shock absorbers generally use a fixed structure and fixed performance parameters, including shock absorber spring preload, recovery damping force, compression damping force and other key performance parameters of the front shock absorption performance are all fixed values. The adaptation range of road conditions is relatively narrow, and it cannot meet the different needs of different road conditions, and the adaptability is poor. Especially for light vehicles such as small new energy vehicles, the scope of application is relatively wide. Only using a standardized shock absorber structure will lead to small new energy vehicles using a unified standard shock absorber cannot adapt to different use environments, resulting in Comfort and reliability don't go hand in hand.

SUMMARY OF THE INVENTION

In view of this, the utility model proposes a damping adjustable shock absorber for air suspension, which aims to solve the problem that the key performance parameters of the existing shock absorber are fixed values, which leads to the compromise of comfort and shock absorption adjustment of the car.

The utility model provides a damping adjustable shock absorber for air suspension, the shock absorber comprises: a hydraulic cylinder, a piston rod movably connected with the hydraulic cylinder and a hydraulic piston arranged in the hydraulic cylinder; wherein , one end of the piston rod is arranged outside the hydraulic cylinder, and the other end is arranged inside the hydraulic cylinder and is connected with the hydraulic piston; the outside of the hydraulic cylinder is provided with a cylinder coaxially arranged with it, and the inside of the cylinder is A cylinder piston is arranged below the hydraulic cylinder and connected with the hydraulic cylinder, and the cylinder piston is slidably connected with the inner wall of the cylinder to compress the compressed gas in the cylinder; the hydraulic pressure The top of the cylinder is provided with a dust cover, which is sleeved outside the cylinder and is slidably connected to the outer wall of the cylinder; the piston rod passes through the dust cover and is used to drive the hydraulic piston and the dust cover slides along the axial direction of the hydraulic cylinder; an elastic member is arranged between the dust cover and the cylinder to generate a damping force along the axial direction of the hydraulic cylinder.

Further, in the above-mentioned adjustable damping shock absorber for air suspension, the bottom wall of the hydraulic cylinder and the cylinder piston are spaced to form a circular cavity; the bottom wall of the hydraulic cylinder is provided with a compression valve and a compensation valve for opening when the oil pressure in the hydraulic cylinder increases, so that the hydraulic oil of the hydraulic cylinder flows to the circular cavity.

Further, in the above-mentioned adjustable damping shock absorber for air suspension, the cylinder is provided with a sliding cylinder block coaxially arranged with the cylinder; the outer wall of the sliding cylinder block is slidably connected to the cylinder, The inner wall of the sliding cylinder is connected with the side wall of the cylinder piston.

Further, in the above-mentioned adjustable damping shock absorber for air suspension, between the sliding cylinder and the side wall of the hydraulic cylinder, there is a U-shaped cavity with an inner hollow axial section, which is connected to the circular cavity. body connected.

Further, in the above-mentioned adjustable damping shock absorber for air suspension, the open end of the hydraulic cylinder is provided with a sealing cover for sealing the hydraulic cylinder and the U-shaped cavity.

Further, in the above-mentioned damping adjustable shock absorber for air suspension, the dust cover is provided with an upper bracket along its circumferential direction, and the cylinder is provided with a lower bracket along its circumferential direction; the elastic member is arranged on the upper bracket and the upper bracket. between the lower brackets.

Further, in the above-mentioned adjustable damping shock absorber for air suspension, the upper bracket is arranged along the entire circumference of the dust cover; and/or, the lower bracket is arranged along the entire circumference of the cylinder .

Further, in the above-mentioned adjustable damping shock absorber for air suspension, the elastic member is a spring, and is arranged around the outer side of the cylinder and the dust cover along the circumferential direction of the cylinder and the dust cover. .

Further, in the above-mentioned adjustable damping shock absorber for air suspension, an expansion valve and a flow valve are provided on the hydraulic piston.

Further, in the above-mentioned air suspension with adjustable damping shock absorber, the piston rod and the hydraulic piston are connected by a nut.

The damping adjustable shock absorber for air suspension provided by the utility model, in the course of use, when the road condition is simple and the acting force is small, the external acting force generates the damping force through the coordinated action of the hydraulic oil and the spring in the hydraulic cylinder; When the force increases, when the hydraulic piston reaches the limit position, it no longer acts as a shock absorber. At this time, the compressed air and elastic parts can continue to be compressed, resulting in a larger and continuously increasing damping force; Different damping forces are used to achieve the effect of automatic adjustment of the damping, that is, the damping force of the shock absorber is automatically adjusted according to the different road conditions, so as to improve the comfort and shock absorption effect of the whole vehicle, and expand the adaptability of the vehicle to the road conditions.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are only for the purpose of illustrating the preferred embodiments, and are not considered to be a limitation of the present invention. Also, the same components are denoted by the same reference numerals throughout the drawings. In the attached image:

FIG. 1 is a schematic structural diagram of a damping adjustable shock absorber for an air suspension provided by an embodiment of the present invention.

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be more thoroughly understood, and will fully convey the scope of the present disclosure to those skilled in the art. It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict. The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

Referring to FIG. 1 , which is a schematic structural diagram of a damping adjustable shock absorber for air suspension provided by an embodiment of the present invention, the damping adjustable shock absorber for air suspension includes: a hydraulic cylinder 1 , a piston rod 2 , a hydraulic piston 3. Cylinder 4, cylinder piston 5, dust cover 6, elastic member 7; among them,

One end of the piston rod 2 (the upper end as shown in Fig. 1 ) is arranged outside the hydraulic cylinder 1 and passes through the dust cover 6 and the sealing cover 9, and the other end (the lower end as shown in Fig. 1 ) is arranged in the hydraulic cylinder 1 It is connected with the hydraulic piston 3 , so that the piston rod 2 pushes the hydraulic piston 3 and the dust cover 6 to move along the axial direction of the hydraulic cylinder 1 under the action of the force. Specifically, the opening end of the hydraulic cylinder 1 is provided with a sealing cover 9 for sealing the hydraulic cylinder 1 and the U-shaped cavity 15 to prevent the hydraulic oil in the hydraulic cylinder 1 and the U-shaped cavity 15 from overflowing under the action of pressure. The dust cover 6 and the sealing cover 9 are provided with through holes at the corresponding positions of the piston rod 2, so that the piston rod 2 is penetrated and partially placed in the hydraulic cylinder 1, thereby driving the hydraulic piston 3 to slide along the inner wall of the hydraulic cylinder 1, so as to compress Hydraulic oil in hydraulic cylinder 1. In order to facilitate the disassembly of the shock absorber, preferably, the piston rod 2 and the hydraulic piston 3 are connected by a nut.

Continue to refer to FIG. 1 , the hydraulic cylinder 1 is provided with a cylinder 4 coaxially arranged with it, and the cylinder 4 is provided with a cylinder piston 5 placed under the hydraulic cylinder 1 and connected with the hydraulic cylinder 1, and the cylinder piston 5 and the cylinder 4 are connected. The inner walls are slidably connected to compress the compressed gas in the cylinder 4 .

Specifically, the open end of the cylinder 4 (the upper end shown in FIG. 1 ) is set upward to avoid interference between the piston rod 2 and the cylinder 4; the cylinder piston 5 is slidably connected to the inner wall of the cylinder 4 so as to The compressed gas in the cylinder 4 is sealed between the closed end of the cylinder 4 (the lower end as shown in Figure 1) and the cylinder piston 5, and the compressed gas is compressed with the downward sliding of the cylinder piston 5, thereby forming a compressed motion of the suspension damping force. Preferably, the cylinder 4 is provided with a sliding cylinder 8 coaxially arranged with the cylinder 4 , the outer wall of the sliding cylinder 8 is slidably connected with the cylinder 4 , and the inner wall of the sliding cylinder 8 is connected with the side wall of the cylinder piston 5 , so as to improve the sliding stability of the cylinder piston 5 relative to the cylinder 4 .

Continuing to refer to FIG. 1 , a dust cover 6 is provided above the hydraulic cylinder 1, the dust cover 6 is sleeved outside the cylinder 4 and is slidably connected with the outer wall of the cylinder 4, and the piston rod 2 is passed through the dust cover 6, It is used to drive the hydraulic piston 3 and the dust cover 6 to slide along the axial direction of the hydraulic cylinder 1 , and an elastic member 7 is arranged between the dust cover 6 and the cylinder 4 to generate a damping force along the axial direction of the hydraulic cylinder 1 .

Specifically, the top plate cover of the dust cover 6 is set above the hydraulic cylinder 1 and the cylinder 4, the side plate of the dust cover 6 is sleeved outside the cylinder 4, and the side plate of the dust cover 6 is slidable with the outer wall of the cylinder 4 It is connected to the ground so that the dust cover 6 and the cylinder 4 can move up and down relatively, so that the elastic member 7 generates a damping force along the axial direction of the hydraulic cylinder 1, so as to prevent the suspension from compressing or extending. to the damping effect. In order to further ensure that the damping force generated by the elastic member 7 is along the axial direction of the hydraulic cylinder 1, preferably, the dust cover 6 is provided with an upper bracket 61 along its circumferential direction, and the cylinder 4 is provided with a lower bracket 41 along its circumferential direction. between the upper bracket 61 and the lower bracket 41; further preferably, the upper bracket 61 is arranged along the entire circumference of the dust cover 6; and/or, the lower bracket 41 is arranged along the entire circumference of the cylinder 4, so that the elastic member 7 fixed and damping force transmission. Among them, the elastic member 7 is a spring, and is arranged around the outer side of the cylinder 4 and the dust cover 6 along the circumferential direction of the cylinder 4 and the dust cover 6; the upper end of the spring is connected with the upper bracket 61, and the lower end is connected with the lower bracket 41. , so that with the up and down sliding of the dust cover 6, the spring can be stretched or compressed so that it can dampen the suspension during the compression movement or extension movement.

Further, the hydraulic piston 3 is provided with an expansion valve 10 and a flow valve 11. During the compression stroke, for example, the wheel of the car moves closer to the body, and the shock absorber is compressed. The volume decreases, the oil pressure increases, and the hydraulic oil flows to the chamber (upper chamber) above the hydraulic piston 3 through the flow valve 11 . The upper cavity is occupied by the piston rod 2 part of the space, so the increased volume of the upper cavity is smaller than the reduced volume of the lower cavity, that is, the volume of the hydraulic oil is larger than the volume of the hydraulic cylinder 1, which does not prevent the hydraulic oil from affecting the hydraulic cylinder 1 and the sealing cover. 9 and so on, preferably, a circular cavity 12 is formed between the bottom wall of the hydraulic cylinder 1 and the cylinder piston 5 arranged under the hydraulic cylinder 1 to form a circular cavity 12, and the bottom wall of the hydraulic cylinder 1 is provided with a compression valve 13 And the compensation valve 14 is used to open when the oil pressure in the hydraulic cylinder 1 increases so that the hydraulic oil of the hydraulic cylinder 1 flows into the circular cavity 12, that is to say, the increased volume of the upper chamber is smaller than that of the lower chamber. When the volume is increased, a part of the hydraulic oil pushes open the compression valve 13 and flows to the circular cavity 12 for storing hydraulic oil. In order to further increase the oil storage capacity of the circular cavity 12 , it is further preferred that an inner hollow axial section is a U-shaped cavity 15 between the sliding cylinder and the side wall of the hydraulic cylinder, which communicates with the circular cavity 10 . , in order to store hydraulic oil to expand the oil storage capacity of the circular cavity 12 , thereby further increasing the distance between the piston rod 2 and the hydraulic piston 3 moving up and down. As shown in FIG. 1 , that is to say, the side wall of the shock absorber is sequentially provided with a dust cover 6 , a cylinder 4 , a sliding cylinder 8 , a U-shaped cavity 15 and a hydraulic cylinder 1 from the outer circumferential center axis at the A-A position. .

Among them, the expansion valve 10 , the flow valve 11 , the compression valve 13 and the compensation valve 14 save the hydraulic oil to form the damping force for the compressed motion of the suspension. On the contrary, when the shock absorber is extended, the wheel is equivalent to moving away from the body, and the shock absorber is stretched. At this time, the hydraulic piston 3 of the shock absorber moves upward, the oil pressure in the upper chamber of the hydraulic piston 3 increases, the flow valve 11 is closed, and the hydraulic oil in the upper chamber pushes the expansion valve 10 into the lower chamber. The oil flowing from the cavity is not enough to fill the increased volume of the lower cavity, which mainly causes a vacuum in the lower cavity. At this time, the hydraulic oil in the circular cavity 12 pushes open the compensation valve 14 and flows into the lower cavity for replenishment. Due to the throttling effect of these valves, the suspension has a damping effect during the extension movement.

Referring to FIG. 1, the working process of the damping adjustable shock absorber for air suspension provided in this embodiment will now be described in detail:

During the compression stroke, for example, the wheels of a car move closer to the body, and the shock absorber is compressed:

When the force is small, the piston rod 2 drives the hydraulic piston 3 and the dust cover 6 to move downward; the pressure piston 3 moves downward, the volume of the lower chamber of the hydraulic piston 3 decreases, the oil pressure rises, and the hydraulic oil passes through the circulation valve 11 Flow to the chamber above the hydraulic piston 3 (upper chamber). The upper cavity is occupied by the piston rod 2, so the increased volume of the upper cavity is smaller than the reduced volume of the lower cavity. A part of the hydraulic oil pushes open the compression valve 13 and flows into the circular cavity 12 and the U-shaped cavity 15. The saving of the hydraulic oil by the expansion valve 10, the circulation valve 11, the compression valve 13 and the compensation valve 14 forms the damping force of the compressed motion of the suspension; The elastic member 7 causes the elastic member 7 to generate a damping force along the axial direction of the hydraulic cylinder 1, so as to dampen the compressive motion of the suspension; that is, when the acting force is small, the hydraulic pressure in the hydraulic cylinder 1 The oil and the elastic member 7 work together to generate damping force;

With the increase of the force, when the hydraulic piston reaches the limit position, it no longer acts as a shock absorber. At this time, the piston rod 2 drives the hydraulic piston 3 and the dust cover 6 to move down; the hydraulic piston 3 drives the hydraulic cylinder 1 and the cylinder piston. 5 and the sliding cylinder block 8 move downward as a whole along the inner wall of the cylinder 4. At this time, the compressed air can continue to be compressed, resulting in a larger and increasing damping force; the dust cover 6 also follows the piston rod 2 relative to the cylinder 4. Moving downward, the elastic member 7 between the upper bracket 61 and the lower bracket 41 is compressed, so that the elastic member 7 generates a damping force along the axial direction of the hydraulic cylinder 1, so as to dampen the compressive motion of the suspension; that is, That is to say, when the acting force is relatively large, the hydraulic oil, compressed air and elastic member 7 in the hydraulic cylinder 1 cooperate together to generate damping force.

When the stroke is extended, the shock absorber is stretched when the wheel is away from the body:

The piston rod 2 of the shock absorber drives the hydraulic piston 3 and the dust cover 6 to move upward; the oil pressure in the upper chamber of the hydraulic piston 3 rises, the flow valve 11 is closed, and the hydraulic oil in the upper chamber pushes the expansion valve 10 into the lower chamber; With the existence of the piston rod 2, the hydraulic oil flowing from the upper cavity is not enough to fill the increased volume of the lower cavity, so that a vacuum degree is generated in the lower cavity. At this time, the hydraulic oil in the circular cavity 12 and the U-shaped cavity 15 is pushed away The compensation valve 14 flows into the lower chamber for supplementation. Due to the throttling effect of these valves, it acts as a damper when the suspension is stretched; the dust cover 6 moves upward to stretch the space between the upper bracket 61 and the lower bracket 41. The elastic member 7 causes the elastic member 7 to generate a damping force along the axial direction of the hydraulic cylinder 1, so as to dampen the extension movement of the suspension; that is to say, the hydraulic oil in the hydraulic cylinder 1 and the elastic member 7 together The coordinated action produces damping forces.

To sum up, the damping adjustable shock absorber for air suspension provided in this embodiment, when the road conditions are simple and the force is small, the external force generates the damping force through the coordinated action of the hydraulic oil and the spring in the hydraulic cylinder. ; With the increase of the acting force, when the hydraulic piston reaches the limit position, it no longer acts as a shock absorber. At this time, the compressed air and elastic parts can continue to be compressed, resulting in a larger and increasing damping force; Different damping forces are provided to achieve the effect of automatic adjustment of the damping, that is, the damping force of the shock absorber is automatically adjusted according to the different road conditions, so as to improve the comfort and shock absorption effect of the whole vehicle, and expand the adaptability of the vehicle to the road conditions. .

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalents, the present utility model is also intended to include these modifications and variations.

Claims (10)

1. A damping adjustable shock absorber for an air suspension is characterized by comprising: the hydraulic cylinder (1), a piston rod (2) movably connected with the hydraulic cylinder (1) and a hydraulic piston (3) arranged in the hydraulic cylinder (1); wherein,

one end of the piston rod (2) is arranged outside the hydraulic cylinder (1), and the other end of the piston rod is arranged in the hydraulic cylinder (1) and is connected with the hydraulic piston (3);

a cylinder (4) coaxially arranged with the hydraulic cylinder (1) is arranged outside the hydraulic cylinder (1), a cylinder piston (5) which is arranged below the hydraulic cylinder (1) and connected with the hydraulic cylinder (1) is arranged in the cylinder (4), and the cylinder piston (5) is slidably connected with the inner wall of the cylinder (4) to compress compressed gas in the cylinder (4);

a dust cover (6) is arranged above the hydraulic cylinder (1), sleeved outside the cylinder (4) and slidably connected with the outer wall of the cylinder (4);

the piston rod (2) penetrates through the dust cover (6) and is used for driving the hydraulic piston (3) and the dust cover (6) to slide along the axial direction of the hydraulic cylinder (1);

an elastic part (7) is arranged between the dust cover (6) and the cylinder (4) and is used for generating damping force along the axial direction of the hydraulic cylinder (1).

2. The damper adjustable shock absorber for air suspension as claimed in claim 1,

a round cavity (12) is formed between the bottom wall of the hydraulic cylinder (1) and the cylinder piston (5) at intervals;

be equipped with compression valve (13) and compensating valve (14) on the diapire of pneumatic cylinder (1), be used for in open when hydraulic pressure increases in pneumatic cylinder (1) so that the hydraulic oil of pneumatic cylinder (1) flows to circular cavity (12).

3. The damper adjustable shock absorber for air suspension as claimed in claim 2,

a sliding cylinder body (8) which is coaxial with the cylinder (4) is arranged in the cylinder (4);

the outer wall of the sliding cylinder body (8) is connected with the cylinder (4) in a sliding mode, and the inner wall of the sliding cylinder body (8) is connected with the side wall of the cylinder piston (5).

4. The damper adjustable shock absorber for air suspension as claimed in claim 3,

an inner hollow cavity (15) with a U-shaped axial cross section is arranged between the sliding cylinder body (8) and the side wall of the hydraulic cylinder (1) and communicated with the circular cavity (12).

5. The damper adjustable shock absorber for air suspension as claimed in claim 4,

and a sealing cover (9) is arranged at the opening end of the hydraulic cylinder (1) and is used for sealing the hydraulic cylinder (1) and the U-shaped cavity (15).

6. The damping tunable shock absorber for air suspension according to any one of claims 1 to 5, wherein,

the dust cover (6) is provided with an upper bracket (61) along the circumferential direction of the dust cover, and the cylinder (4) is provided with a lower bracket (41) along the circumferential direction of the cylinder;

the elastic member (7) is disposed between the upper bracket (61) and the lower bracket (41).

7. The damper adjustable shock absorber for air suspension as claimed in claim 6, wherein,

the upper bracket (61) is arranged along the circumferential whole circumference of the dust cover (6); and/or the presence of a gas in the gas,

the lower bracket (41) is arranged along the circumferential direction of the cylinder (4) in the whole circumference.

8. The damping tunable shock absorber for air suspension according to any one of claims 1 to 5, wherein,

the elastic piece (7) is a spring and is arranged on the outer sides of the cylinder (4) and the dust cover (6) in a winding mode along the circumferential direction of the cylinder (4) and the dust cover (6).

9. The damping tunable shock absorber for air suspension according to any one of claims 1 to 5, wherein,

the hydraulic piston (3) is provided with an extension valve (10) and a circulation valve (11).

10. The damping tunable shock absorber for air suspension according to any one of claims 1 to 5, wherein,

the piston rod (2) is connected with the hydraulic piston (3) through a nut.