Active suspension system

Abstract

The utility model belongs to the technical field of suspensions, and particularly relates to an active suspension system which comprises an oil pump, an oil outlet of the oil pump is connected with a connecting oil pipe, and the tail end of the connecting oil pipe is connected with a shock absorber. The connecting oil pipe is connected with an energy storage device, and part of oil flowing out of the oil pump enters the energy storage device through the connecting oil pipe. When the height of a vehicle body needs to be increased and the oil pump and the energy storage device work, oil flowing out of the oil pump enters the shock absorber and the energy storage device, and when the oil pump does not work, oil in the energy storage device enters the shock absorber; when the height of a vehicle body needs to be reduced and the oil pump and the energy storage device work, oil flows to the oil pump and the energy storage device from the shock absorber, and when the oil pump does not work, the oil flows to the energy storage device from the shock absorber. The utility model has the advantages that the response is quick, and the height of the vehicle body can be quickly adjusted so as to improve the driving comfort.

Description

Technical Field

[0001] The utility model belongs to the technical field of suspension, and in particular relates to an active suspension system. Background Art

[0002] Suspension is a general term for the force transmission connection device between the automobile frame (or load-bearing body) and the axle (or wheel). Its function is to transmit the force and torque acting between the wheel and the frame, and to cushion the impact force transmitted to the frame or body by the uneven road surface, so as to reduce the vibration caused thereby and ensure that the car can run smoothly.

[0003] At present, the typical suspension structure is composed of elastic elements, guide mechanisms and shock absorbers, and some suspension structures also have buffer blocks, lateral stabilizer bars, etc. Among them, the elastic elements are in the form of leaf springs, air springs, coil springs and torsion bar springs. In modern cars, the suspension structure mostly uses coil springs and torsion bar springs, and some high-end cars use air springs.

[0004] The air suspension used in the existing suspension structure can adjust the stiffness according to the suspension load and force conditions, but its adjustment speed is slow, especially the adjustment speed of the vehicle body height is slow, which is difficult to meet the actual needs. Based on the above practical difficulties, it is urgent to improve the suspension structure. Utility Model Content

[0005] The utility model provides an active suspension system which has quick response and can adjust the height of the vehicle body quickly to improve the driving comfort.

[0006] The technical solution of the utility model includes: an active suspension system, including an oil pump, an oil outlet of the oil pump is connected to a connecting oil pipe, and the end of the connecting oil pipe is connected to a shock absorber; the connecting oil pipe is connected to an energy accumulator, and part of the oil flowing out of the oil pump enters the energy accumulator through the connecting oil pipe; when it is necessary to increase the height of the vehicle body, when the oil pump and the energy accumulator are working, the oil flowing out of the oil pump and the energy accumulator enters the shock absorber, and when the oil pump is not working, the oil in the energy accumulator enters the shock absorber; when it is necessary to lower the height of the vehicle body, when the oil pump and the energy accumulator are working, the oil flows from the shock absorber to the oil pump and the energy accumulator, and when the oil pump is not working, the oil flows from the shock absorber to the energy accumulator.

[0007] Preferably, the shock absorber is provided with a connecting piece connected to the end of the connecting oil pipe, and an oil passage connecting the connecting oil pipe and the shock absorber is provided in the connecting piece.

[0008] Preferably, the number of the connecting parts is two, and the two connecting parts are arranged on both sides of the shock absorber. The number of the connecting oil pipes is two, and both of the connecting oil pipes are connected to the energy accumulator, one of the connecting parts is connected to the end of one of the connecting oil pipes, and the other connecting part is connected to the end of the other connecting oil pipe.

[0009] Preferably, a solenoid valve is provided at a position of the connecting oil pipe close to the oil pump. When the oil pump is working, the solenoid valve remains in an open state, and when the oil pump is not working, the solenoid valve remains closed.

[0010] Preferably, the connecting oil pipe is provided with a three-way joint, the first interface and the second interface of the three-way joint are in communication with the connecting oil pipe, and the third interface of the three-way joint is in communication with the energy accumulator.

[0011] Preferably, the connecting oil pipe is connected to the accumulator via a second pipeline, and a solenoid valve is provided on the second pipeline; a first pipeline connected in parallel with the second pipeline is also provided between the accumulator and the connecting oil pipe, and a one-way valve is provided on the first pipeline.

[0012] Preferably, a three-way joint is provided at the connection between the second pipeline and the connecting oil pipe, the first interface and the second interface of the three-way joint are in communication with the connecting oil pipe, and the third interface of the three-way joint is in communication with the second pipeline.

[0013] Preferably, the energy accumulator is mounted on the housing of the oil pump, the energy accumulator is connected to the connecting oil pipe via an oil pipe, and a solenoid valve is provided on the oil pipe.

[0014] The beneficial effects of the utility model are as follows: by connecting the end of the connecting oil pipe of the oil pump to the shock absorber, when the vehicle body height needs to be raised during driving, the oil flowing out of the oil pump can enter the shock absorber through the connecting oil pipe, and the shock absorber is stretched by the oil to increase the vehicle body height; when the vehicle body height needs to be lowered during driving, the oil flows out of the shock absorber and enters the oil pump through the connecting oil pipe. After the oil flows out, the shock absorber is compressed and the vehicle body height is lowered, so as to realize the active adjustment of the vehicle body height by the oil. In addition, the connecting pipeline is connected to the energy accumulator, and part of the oil flowing out of the oil pump enters the energy accumulator during operation. When the vehicle body height needs to be adjusted to adapt to the driving road conditions, the oil in the energy accumulator can also flow between the shock absorbers, which can play a role in regulating the volume of the entire active suspension system, and can generate a pressure difference between the upper and lower chambers of the shock absorber, compensate for the oil in the upper and lower chambers of the shock absorber, and alleviate the oil fluctuation of the system. In addition, the addition of the energy accumulator can also play a certain passive adjustment role when the oil pump is not working. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0016] Figure 1 is a schematic diagram of an active suspension system of Embodiment 1;

[0017] Figure 2 is a schematic diagram of an active suspension system of Embodiment 2;

[0018] Figure 3 Schematic diagram of the active suspension system of the third embodiment.

[0019] in:

[0020] 1. Oil pump, 2. Energy accumulator, 3. Shock absorber, 4. Connecting oil pipe, 5. Solenoid valve, 6. Three-way connector, 7. Connecting piece, 8. First pipeline, 81. One-way valve, 9. Second pipeline. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0022] In this article, the terms "upper, lower, left, right, inside, outside" and the like are established based on the positional relationships shown in the drawings. Depending on the different drawings, the corresponding positional relationships may also change accordingly. Therefore, they cannot be understood as absolute limitations on the scope of protection; moreover, relational terms such as "first" and "second" and the like are only used to distinguish one component with the same name from another, and do not necessarily require or imply any such actual relationship or order between these components. In addition, in the embodiments of the present utility model, "above", "below", etc., include the number itself.

[0023] Reference Figures 1 to 3 The active suspension system of this embodiment includes an oil pump 1, and an oil connecting pipe 4 is connected to the oil outlet of the oil pump 1. The end of the oil connecting pipe 4 is connected to the shock absorber 3, so that the oil pumped from the oil pump 1 can enter the shock absorber 3 through the oil connecting pipe 4.

[0024] Furthermore, the energy accumulator 2 is connected to the connecting oil pipe 4, and part of the oil flowing out of the oil pump 1 enters the energy accumulator 2 through the connecting oil pipe 4. The oil entering the energy accumulator 2 can, on the one hand, flow between the shock absorbers 3 when the oil pump 1 is working, so that a pressure difference is generated between the upper and lower chambers of the shock absorber, thereby compensating for the oil in the upper and lower chambers of the shock absorber, and can alleviate the oil fluctuation of the system, and can play a positive role in the volume regulation of the entire active suspension system; on the other hand, when the oil pump 1 is not working, the oil in the energy accumulator 2 can still flow between the shock absorbers 3, playing a certain passive regulation role, and increasing the reliability of the entire system.

[0025] The active suspension system of this embodiment, when in use, when it is necessary to increase the height of the vehicle body, when the oil pump 1 and the energy accumulator 2 are working, the oil flowing out of the oil pump 1 and the energy accumulator 2 enters the shock absorber 3, and when the oil pump 1 is not working, the oil in the energy accumulator 3 enters the shock absorber 3; when it is necessary to lower the height of the vehicle body, when the oil pump 1 and the energy accumulator 2 are working, the oil flows from the shock absorber 3 to the oil pump 1 and the energy accumulator 2, and when the oil pump 1 is not working, the oil flows from the shock absorber 3 to the energy accumulator 4.

[0026] The active suspension system of this embodiment connects the end of the connecting oil pipe 4 of the oil pump 1 to the shock absorber 3. When the vehicle needs to raise the height of the vehicle body during driving, the oil flowing out of the oil pump 1 can enter the shock absorber 3 through the connecting oil pipe 4, and the shock absorber 3 is stretched by the oil to increase the height of the vehicle body; when the vehicle needs to lower the height of the vehicle body during driving, the oil flows out from the shock absorber 3 and enters the oil pump 1 through the connecting oil pipe 4. After the oil flows out, the shock absorber 3 is compressed and the height of the vehicle body is lowered, so as to achieve active adjustment with rapid response by using the oil. In addition, the energy accumulator 2 is connected to the connecting pipe 4. When the vehicle body height needs to be adjusted to adapt to the driving road conditions, the oil in the energy accumulator 2 can also flow between the shock absorbers 3, which can play a role in regulating the volume of the entire active suspension system, and can generate a pressure difference between the upper and lower chambers of the shock absorber 3, compensate for the oil in the upper and lower chambers of the shock absorber 3, and alleviate the oil fluctuation of the system. In addition, the addition of the energy accumulator 2 can also play a certain passive adjustment role when the oil pump 1 is not working, thereby enhancing the reliability and safety of the entire system.

[0027] Specifically, the shock absorber 3 is provided with a connector 7 connected to the end of the connecting oil pipe 4, and an oil passage connecting the connecting oil pipe 4 and the shock absorber 3 is provided in the connector 7. By designing the connector 7 connected to the end of the connecting oil pipe 4 on the shock absorber 3, the oil from the connecting oil pipe 4 is introduced into the shock absorber 3 by the connector 7, and the oil is buffered in the connector 7 before entering the shock absorber 3, so as to improve the response speed of the suspension system and improve the stability of lifting or lowering the vehicle body.

[0028] The number of connecting members 7 is designed to be two, and the two connecting members 7 are arranged on both sides of the shock absorber 3. Correspondingly, the number of connecting oil pipes 4 is also designed to be two, and both connecting oil pipes 4 are connected to the energy accumulator 3, one of the connecting members 7 is connected to the end of one of the connecting oil pipes 4, and the other connecting member 7 is connected to the end of the other connecting oil pipe 4. In this way, two connecting members 7 are designed on both sides of the shock absorber 3 to receive the oil from the connecting oil pipes 4 on both sides of the shock absorber 3, so as to avoid the skew problem caused by too much oil entering one side of the shock absorber 3, so as to improve the stability of the suspension system in raising or lowering the vehicle body and improve the comfort experience of the driver and passengers.

[0029] Reference Figure 1 In a specific implementation of this embodiment, a solenoid valve 5 is provided at a position of the connecting oil pipe 4 near the oil pump 1, specifically, on the front section of the pipeline connecting the energy accumulator 2 in the connecting oil pipe 4, where the front section of the pipeline refers to the front section near the oil pump 1 and the rear section near the shock absorber 3. When the oil pump 1 is working, the solenoid valve 5 remains open, and when the oil pump 1 is not working, for example, in some scenarios, the oil pump 1 does not need to work, and the solenoid valve 5 remains closed. In this way, by designing the solenoid valve 5 on the connecting oil pipe 4 and using the solenoid valve 5 to control the on and off of the oil pump 1, the passage of the oil pump 1 can be reliably closed after the oil pump 1 stops working, thereby improving the reliability of the entire system.

[0030] Continue to refer to Figure 1 A three-way joint 6 is provided on the connecting oil pipe 4, a first interface and a second interface of the three-way joint 6 are connected to the connecting oil pipe 4, and a third interface of the three-way joint 6 is connected to the energy accumulator 2. In this embodiment, the energy accumulator 2 is installed on the connecting oil pipe 4 by using the three-way joint 6, which has a simple structure and is easy to assemble.

[0031] Reference Figure 2In another embodiment, the connecting oil pipe 4 is connected to the accumulator 2 through the second pipeline 9, and the second pipeline 9 is provided with a solenoid valve 5; and a first pipeline 8 connected in parallel with the second pipeline 9 is provided between the accumulator 2 and the connecting oil pipe 4, and a one-way valve 81 is provided on the first pipeline 8. When working, the oil pumped out from the oil pump 1 enters the accumulator 2 through the second pipeline 9, and the solenoid valve 5 of the second pipeline 9 is in an open state. At the same time, the one-way valve 81 on the first pipeline 8 is connected in the direction from the accumulator 2 to the shock absorber 3. When the oil pump 1 controls the shock absorber 3 to stretch or compress, the oil connected to the oil pipe 4 is difficult to enter the accumulator 2 through the first pipeline 8 due to the obstruction of the one-way valve 81. That is, when the vehicle body is raised, the oil in the accumulator 2 flows to the shock absorber 3 through the first pipeline 8. At this time, the solenoid valve 5 of the second pipeline 9 is in a closed state, so that the oil in the accumulator 2 flows out through the first pipeline 8; when the vehicle body is lowered, the oil in the shock absorber 3 enters the accumulator 2 from the second pipeline 9. At this time, the solenoid valve 5 of the second pipeline 9 is in an open state, thereby making the oil circuits in and out of the accumulator 2 independent and improving reliability. Specifically, a three-way joint 6 is provided at the connection between the second pipeline 9 and the connecting oil pipe 4. The first interface and the second interface of the three-way joint 6 are connected to the connecting oil pipe 4, and the third interface of the three-way joint 6 is connected to the second pipeline 9. By designing the three-way joint 6 at the connection between the second pipeline 9 and the connecting oil pipe 4, the processing and assembly of the suspension system are facilitated.

[0032] Reference Figure 3 The accumulator 2 is mounted on the housing of the oil pump 1. The accumulator 2 is connected to the connecting oil pipe 4 through an oil pipe, and a solenoid valve 5 is provided on the oil pipe. By mounting the accumulator 2 on the housing of the oil pump 1, the accumulator 2 and the oil pump 1 are designed as an integrated assembly, which can reduce the occupied suspension space and provide advantages for the design of the underbody space of the entire vehicle body.

[0033] In the case where the embodiments are not contradictory, at least part of the technical solutions in the embodiments can be recombined to form the substantial technical solution of the utility model. Of course, the embodiments can also be referenced or included in each other. In addition, it should be noted that the adaptive adjustments and modifications made by those skilled in the art when recombining the technical means recorded in the embodiments will also fall within the protection scope of the utility model.

[0034] The technical principle of the present invention is described above in combination with specific implementations, but it should be noted that the above descriptions are only for explaining the principle of the present invention and cannot be interpreted in any way as a specific limitation on the protection scope of the present invention. Based on the explanation here, technicians in this field can think of other specific implementations or equivalent replacements of the present invention without creative work, and they will fall within the protection scope of the present invention.

Claims

1. An active suspension system, characterized in that: It comprises an oil pump (1), the oil outlet of the oil pump (1) is connected to a connecting oil pipe (4), and the end of the connecting oil pipe (4) is connected to a shock absorber (3); The connecting oil pipe (4) is connected to an energy accumulator (2), and part of the oil flowing out of the oil pump (1) enters the energy accumulator (2) through the connecting oil pipe (4); When the vehicle body height needs to be increased, when the oil pump (1) and the energy accumulator (2) are in operation, the oil flowing out of the oil pump (1) and the energy accumulator (2) enters the shock absorber (3); when the oil pump (1) is not in operation, the oil in the energy accumulator (2) enters the shock absorber (3); When the vehicle body height needs to be lowered, when the oil pump (1) and the energy accumulator (2) are in operation, oil flows from the shock absorber (3) to the oil pump (1) and the energy accumulator (2); when the oil pump (1) is not in operation, oil flows from the shock absorber (3) to the energy accumulator (2).

2. An active suspension system according to claim 1, characterized in that: The shock absorber (3) is provided with a connecting piece (7) connected to the end of the connecting oil pipe (4), and an oil passage connecting the connecting oil pipe (4) and the shock absorber (3) is provided in the connecting piece (7).

3. An active suspension system according to claim 2, characterized in that: The number of the connecting members (7) is two, and the two connecting members (7) are arranged on both sides of the shock absorber (3). The number of the connecting oil pipes (4) is two, and the two connecting oil pipes (4) are both connected to the energy accumulator (2), wherein one of the connecting members (7) is connected to the end of one of the connecting oil pipes (4), and the other connecting member (7) is connected to the end of the other connecting oil pipe (4).

4. The active suspension system according to claim 1, characterized in that: A solenoid valve (5) is provided at a position of the connecting oil pipe (4) close to the oil pump (1); when the oil pump (1) is working, the solenoid valve (5) remains in an open state; when the oil pump (1) is not working, the solenoid valve (5) remains closed.

5. The active suspension system according to claim 1, characterized in that: The connecting oil pipe (4) is provided with a three-way joint (6), a first interface and a second interface of the three-way joint (6) are in communication with the connecting oil pipe (4), and a third interface of the three-way joint (6) is in communication with the energy storage device (2).

6. The active suspension system according to claim 1, characterized in that: The connecting oil pipe (4) is connected to the energy accumulator (2) via a second pipeline (9), and a solenoid valve (5) is provided on the second pipeline (9); a first pipeline (8) connected in parallel with the second pipeline (9) is also provided between the energy accumulator (2) and the connecting oil pipe (4), and a one-way valve (81) is provided on the first pipeline (8).

7. An active suspension system according to claim 6, characterized in that: A three-way joint (6) is provided at the connection point between the second pipeline (9) and the connecting oil pipe (4); a first interface and a second interface of the three-way joint (6) are in communication with the connecting oil pipe (4); and a third interface of the three-way joint (6) is in communication with the second pipeline (9).

8. The active suspension system according to claim 1, characterized in that: The energy accumulator (2) is mounted on the housing of the oil pump (1); the energy accumulator (2) is connected to the connecting oil pipe (4) via an oil pipe; and a solenoid valve (5) is provided on the oil pipe.

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