Hydraulic system and vehicle

Abstract

The utility model relates to a hydraulic system and a vehicle, the hydraulic system can comprise a vibration reduction unit, an adjusting unit and a driving unit, and the adjusting unit is telescopically connected to the vibration reduction unit and used for adjusting lifting of the vibration reduction unit; the driving unit is connected to the adjusting unit so as to adjust stretching and retracting of the adjusting unit. According to the hydraulic system, stretching and retracting of the adjusting unit can be adjusted through the driving unit, the adjusting unit is connected with the vibration reduction unit, and therefore the overall height of the vibration reduction unit can be adjusted through stretching and retracting of the adjusting unit, and a spring of the vibration reduction unit does not need to be in a stretched or compressed state; the static stiffness of the spring does not change along with the change of the stiffness of the chassis, so that the stability of the static stiffness of the spring is ensured, the influence of the chassis of a vehicle on the performance of the shock absorber in the lifting process is reduced or even avoided, and the stability and comfort of the vehicle are improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of vehicles, in particular to a hydraulic system and a vehicle. BACKGROUND

[0002] In order to improve the range of use of the vehicle, the vehicle chassis can be raised or lowered so that the vehicle can travel on different road conditions. In the related art, when adjusting the height of the vehicle chassis, the spring on the shock absorber will expand and contract with the change of the height of the chassis, so that the static stiffness of the spring also changes with the height of the chassis, which affects the performance of the shock absorber and the stability and comfort of the vehicle. SUMMARY

[0003] The purpose of the present disclosure is to provide a hydraulic system and a vehicle to avoid the spring expanding and contracting with the change of the height of the chassis, thereby at least partially solving the above technical problems.

[0004] In order to achieve the above purpose, the first aspect of the present disclosure provides a hydraulic system for a suspension structure, comprising: a damping unit; an adjusting unit telescopically connected to the damping unit for adjusting the lifting of the damping unit; and a driving unit connected to the adjusting unit for adjusting the telescoping of the adjusting unit.

[0005] Optionally, the adjusting unit comprises an adjusting body and an adjusting member located at least partially in the adjusting body, the adjusting member is in series with the spring of the damping unit, and the driving unit is connected to the adjusting member to adjust the length of the adjusting member extending out of the adjusting body.

[0006] Optionally, the adjusting body has a cavity inside, the adjusting member comprises a first end and a second end arranged oppositely, the first end is in series with the spring of the damping unit, and the second end is located in the cavity; the second end and the inner wall of the cavity form an adjusting cavity in communication with the driving unit, and the driving unit adjusts the size of the adjusting cavity by injecting or removing hydraulic oil into or out of the adjusting cavity.

[0007] Optionally, the driving unit comprises a first pipeline, a second pipeline and a communication pipeline, the first pipeline and the second pipeline are arranged in parallel and connected with the communication pipeline to be connected to the adjusting unit in an on-off manner; wherein the first pipeline is used to input hydraulic oil into the adjusting unit, and the second pipeline is used to discharge hydraulic oil in the adjusting unit.

[0008] Optionally, the first pipeline is provided with a first valve body, and the second pipeline is provided with a second valve body; the first valve body is in communication with the communication pipeline when the damping unit rises and is disconnected from the communication pipeline when the damping unit falls; and the second valve body is disconnected from the communication pipeline when the damping unit falls and is in communication with the communication pipeline when the damping unit rises.

[0009] Optionally, the communication pipeline comprises a main pipe and at least one branch pipe in communication with the main pipe; the main pipe is in communication with the first pipeline and the second pipeline respectively; each branch pipe is connected to one of the adjusting units; each branch pipe is provided with a third valve body; and / or the main pipe is provided with a one-way throttle valve.

[0010] Optionally, the main pipe is provided with a synchronization valve.

[0011] Optionally, an overflow valve is arranged between the first pipeline and the second pipeline.

[0012] Optionally, the first pipeline is further provided with a pressure sensor for detecting the pressure in the pipeline, and the pressure sensor is in signal connection with the overflow valve.

[0013] Optionally, the driving unit further comprises an oil tank, a motor, and an oil pump connected to the output end of the motor; the first pipeline and the second pipeline are in communication with the oil tank, and the oil pump is arranged in the first pipeline.

[0014] Optionally, the first pipeline is provided with an oil suction filter.

[0015] Optionally, the oil tank is provided with a liquid level sensor.

[0016] Optionally, the adjusting unit is configured with two, and the two adjusting units are connected to different damping units and are both connected to the driving unit; the two adjusting units are used for the front suspension or the rear suspension of the suspension structure.

[0017] According to the second aspect of the present disclosure, a vehicle is provided, comprising the above-mentioned hydraulic system.

[0018] According to the above technical solution, the hydraulic system of the present disclosure can adjust the extension and contraction of the adjusting unit through the driving unit, and the adjusting unit is connected to the damping unit, so that the extension and contraction of the adjusting unit can adjust the height of the damping unit as a whole, without causing the spring of the damping unit to be in a stretched or compressed state, based on which the static stiffness of the spring will not change with the change of the chassis stiffness, ensuring the stability of the static stiffness of the spring, thereby reducing or even avoiding the influence of the performance of the shock absorber of the chassis of the vehicle during the lifting process, and improving the stability and comfort of the vehicle.

[0019] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, illustrate embodiments of the present disclosure and together with the detailed description help to explain the present disclosure, but do not limit the present disclosure. In the drawings:

[0021] Figure 1 is a hydraulic system structure schematic diagram of a first embodiment provided by the present disclosure;

[0022] Figure 2 is a hydraulic system structure schematic diagram of a second embodiment provided by the present disclosure;

[0023] Figure 3 is a hydraulic system structure schematic diagram of a third embodiment provided by the present disclosure;

[0024] Figure 4 is a hydraulic system structure schematic diagram of a fourth embodiment provided by the present disclosure;

[0025] Figure 5 is a hydraulic system structure schematic diagram of a fifth embodiment provided by the present disclosure;

[0026] Figure 6 is a hydraulic system structure schematic diagram of a sixth embodiment provided by the present disclosure;

[0027] Figure 7 is a hydraulic system structure schematic diagram of a seventh embodiment provided by the present disclosure;

[0028] Figure 8 is a hydraulic system structure schematic diagram of an eighth embodiment provided by the present disclosure.

[0029] BRIEF DESCRIPTION OF DRAWINGS

[0030] 1 - damping unit; 2 - adjusting unit; 21 - adjusting body; 22 - adjusting piece; 221 - first end; 222 - second end; 23 - chamber; 231 - adjusting cavity; 3 - driving unit; 31 - first pipeline; 311 - first valve body; 32 - second pipeline; 321 - second valve body; 33 - oil tank; 34 - communication pipeline; 341 - main pipe; 342 - branch pipe; 343 - third valve body; 344 - one-way throttle valve; 345 - synchronization valve; 35 - motor; 36 - oil pump; 4 - overflow valve; 5 - oil suction filter; 6 - liquid level sensor; 7 - pressure sensor. DETAILED DESCRIPTION

[0031] The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0032] In the present disclosure, the orientation words such as "inner" and "outer" used without the opposite description refer to "inner" and "outer" relative to the outline of the corresponding component itself. In addition, the terms "first", "second", "third" and the like used in the present disclosure are used to distinguish one element from another element, and do not have sequentiality and importance. Furthermore, in the following description, the same reference numerals in different drawings represent the same or similar elements unless otherwise explained. The above definitions are only used to explain and illustrate the present disclosure, and should not be understood as limiting the present disclosure.

[0033] The hydraulic system in the exemplary embodiments of the present disclosure will be described below with reference to the accompanying drawings.

[0034] Reference Figures 1 to 8 As shown in the drawings, the first aspect of the present disclosure provides a hydraulic system for a suspension structure, which can include a damping unit 1, an adjusting unit 2 and a driving unit 3, wherein the adjusting unit 2 is telescopically connected to the damping unit 1 for adjusting the lifting of the damping unit 1; and the driving unit 3 is connected to the adjusting unit 2 for adjusting the telescoping of the adjusting unit 2.

[0035] Exemplarily, in the hydraulic system of the present disclosure, the damping unit 1 and the adjusting unit 2 are arranged in sequence in the height direction of the vehicle in the state that the vehicle is normally running.

[0036] According to the above technical solution, when adjusting the height of the vehicle chassis, the driving unit 3 can be used to make the adjusting unit 2 extend or shorten, and the adjusting unit 2 is connected to the damping unit 1, so that the height of the damping unit 1 can be changed. Exemplarily, if the vehicle runs on a relatively flat road section, in order to lower the center of gravity of the vehicle and improve the controllability and stability of the vehicle during running, the driving unit 3 can make the adjusting unit 2 contract, so as to lower the height of the damping unit 1. Correspondingly, when the vehicle runs on a bumpy road section, in order to enable the vehicle to pass smoothly, the driving unit 3 can make the adjusting unit 2 extend, so as to lift the damping unit 1 and increase the height of the damping unit 1. Based on this, the present disclosure can ensure that the spring on the damping unit 1 does not change with the change of the height of the chassis, thereby ensuring the stability of the spring static stiffness, reducing or even avoiding the influence of the lifting of the chassis of the vehicle on the performance of the shock absorber, and improving the stability and comfort of the vehicle.

[0037] In some embodiments of the present disclosure, as Figures 1 to 8As shown, the adjustment unit 2 may include an adjustment body 21 and an adjustment member 22 at least partially located within the adjustment body 21. The adjustment member 22 is connected in series with the spring of the damping unit 1. The drive unit 3 is connected to the adjustment member 22 to adjust the length of the adjustment member 22 extending out of the adjustment body 21. When it is necessary to lower the height of the damping unit 1, the drive unit 3 can move the portion of the adjustment member 22 located outside the adjustment body 21 into the adjustment body 21, thereby causing the damping unit 1 connected to the adjustment member 22 to move towards the adjustment body 21, thus lowering the height of the damping unit 1. When it is necessary to raise the height of the damping unit 1, the drive unit 3 can move the portion of the adjustment member 22 located inside the adjustment body 21 outwards, thereby causing the damping unit 1 connected to the adjustment member 22 to move away from the adjustment body 21, thus raising the height of the damping unit 1.

[0038] Among them, such as Figures 1 to 8 As shown, the interior of the adjusting body 21 has a chamber 23. The adjusting member 22 may include a first end 221 and a second end 222 disposed opposite to each other. The first end 221 is connected in series with the spring of the damping unit 1, and the second end 222 is located inside the chamber 23. The second end 222 and the inner wall of the chamber 23 form an adjusting cavity 231 that communicates with the driving unit 3. The driving unit 3 adjusts the size of the adjusting cavity 231 by injecting or removing hydraulic oil into the adjusting cavity 231. Since the adjustment cavity 231 is part of the chamber 23 and at least part of the adjustment member 22 can extend or retract, the size of the adjustment cavity 231 can be adaptively adjusted according to the amount of hydraulic oil to change the relative position of the adjustment member 22 and the chamber 23, thereby adjusting the height of the damping unit 1. For example, when it is necessary to increase the height of the damping unit 1, the drive unit 3 will cause hydraulic oil to enter the adjustment cavity 231 and accumulate in the adjustment cavity 231. When the hydraulic oil in the adjustment cavity 231 abuts against the second end 222 of the adjustment member 22, it will push the first end 221 of the adjustment member 22 to move outward of the adjustment body 21 to achieve the effect of raising the height of the damping unit 1. Correspondingly, when it is necessary to lower the damping unit 1, the hydraulic oil located in the adjustment cavity 231 can flow out from it. For example, under the action of the vehicle body's own weight, the first end 221 of the adjustment member 22 will move towards the inside of the adjustment body 21 and force the hydraulic oil out of the adjustment cavity 231, thereby achieving the effect of lowering the height of the damping unit 1.

[0039] Of course, hydraulic oil can also flow out of the regulating chamber 231 in other ways. For example, the hydraulic oil in the regulating chamber 231 can also flow out of the regulating chamber 231 under the action of the pump body of the drive unit 3.

[0040] It should be noted that the adjusting unit 2 can be an oil cylinder, and thus the adjusting body 21 is a cylinder barrel of the oil cylinder, and the adjusting member 22 is a piston of the oil cylinder.

[0041] In the embodiments of the present disclosure, as shown in Figures 1 to 8 The driving unit 3 can include a first pipeline 31, a second pipeline 32, and a communication pipeline 34. The first pipeline 31 and the second pipeline 32 are arranged in parallel and are connected with the communication pipeline 34 to be connected to the adjusting unit 2 in an on-off manner. The first pipeline 31 is used to input hydraulic oil to the adjusting unit 2, and the second pipeline 32 is used to discharge hydraulic oil in the adjusting unit 2. That is, the first pipeline 31 can deliver hydraulic oil to the adjusting unit 2 when it is necessary to increase the height of the damping unit 1, and the hydraulic oil flowing out of the adjusting unit 2 can flow out through the second pipeline 32. Since the first pipeline 31 and the second pipeline 32 are connected to the communication pipeline 34 in an on-off manner, the amount of hydraulic oil in the adjusting unit 2 can be adjusted in time. For example, when it is necessary to deliver hydraulic oil to the adjusting unit 2 to increase the height of the damping unit 1, the first pipeline 31 and the communication pipeline 34 can be in communication, and the second pipeline 32 and the communication pipeline 34 can be disconnected. When the hydraulic oil in the adjusting unit 2 needs to flow out of the damping unit 1 to reduce the height of the damping unit 1, the first pipeline 31 and the communication pipeline 34 can be disconnected, and the second pipeline 32 and the communication pipeline 34 can be in communication. In addition, when it is necessary to maintain the stability of the hydraulic oil in the adjusting unit 2, the first pipeline 31 and the second pipeline 32 can be disconnected from the communication pipeline 34.

[0042] Specifically, as shown in Figures 1 to 8 The first pipeline 31 can be provided with a first valve body 311, and the second pipeline 32 can be provided with a second valve body 321. The first valve body 311 is in communication with the communication pipeline 34 when the damping unit 1 is rising, and is disconnected from the communication pipeline 34 when the damping unit 1 is descending. The second valve body 321 is disconnected from the communication pipeline 34 when the damping unit 1 is descending, and is in communication with the communication pipeline 34 when the damping unit 1 is rising. For example, the first valve body 311 can be a simple one-way valve. The one-way valve can allow hydraulic oil to flow from the first pipeline 31 to the adjusting unit 2 and prevent backflow of hydraulic oil. In addition, when it is necessary to reduce the height of the damping unit 1 and the hydraulic oil flows back to the driving unit 3 from the adjusting unit 2, the first valve body 311 can be opened or closed without a complex operation mechanism. Thus, the hydraulic oil cannot flow into the first pipeline 31 but can flow into the second pipeline 32. The second valve body 321 can be an electromagnetic reversing valve. The electromagnetic reversing valve has a fast response speed and can be opened or closed in a short time. Thus, the second valve body 321 can be opened or closed in time when the height of the damping unit 1 is descending or rising, and the stability of the hydraulic system during operation can be ensured to a certain extent.

[0043] It is understandable that the first valve body 311 can also be an electromagnetic reversing valve, as long as the first valve body 311 can be connected to the connecting pipe 34 when the vibration damping unit 1 rises and disconnected from the connecting pipe 34 when the vibration damping unit 1 falls.

[0044] In some implementations, such as Figures 1 to 8 As shown, the connecting pipeline 34 includes a main pipe 341 and at least one branch pipe 342 connected to the main pipe 341. The main pipe 341 is connected to the first pipeline 31 and the second pipeline 32 respectively. Each branch pipe 342 is connected to an regulating unit 2. Each branch pipe 342 is provided with a third valve body 343. And / or, the main pipe 341 is provided with a one-way throttle valve 344. The branch pipe 342 allows the drive unit 3 to connect to multiple vibration damping units 1, enabling simultaneous adjustment of multiple vibration damping units 1. The third valve body 343 on the branch pipe 342 can also be an electromagnetic directional valve. This allows the drive unit 3 to adjust the height of one or more vibration damping units 1 as needed. For example, if there are multiple branch pipes 342 and multiple vibration damping units 1, and they correspond one-to-one, if the height of one vibration damping unit 1 needs to be adjusted, then the third valve body 343 on the branch pipe 342 corresponding to that vibration damping unit 1 needs to be opened, and the third valve bodies 343 on the branch pipes 342 corresponding to the other vibration damping units 1 need to be closed; or, if the height of all multiple vibration damping units 1 needs to be adjusted, then all the third valve bodies 343 need to be opened accordingly. In addition, regardless of whether one or more damping units 1 need to be raised or lowered, the hydraulic oil used to raise or lower the damping unit 1 needs to flow through the main pipe 341. Since the one-way throttle valve 344 has the functions of both a one-way valve and a throttle valve, the one-way throttle valve 344 can make the hydraulic oil flow unidirectionally from the main pipe 341 to the branch pipe 342 when the height of the damping unit 1 needs to be increased. When the height of the damping unit 1 needs to be lowered, the hydraulic oil in the damping unit 1 can flow out of the damping unit 1 through the weight of the vehicle and the hydraulic oil itself. Therefore, the one-way throttle valve 344 can also regulate the flow speed and pressure of the hydraulic oil in this process, and generate a certain back pressure to ensure the stability of the damping unit 1 when it is lowered.

[0045] In addition, such as Figure 2 As shown, a synchronization valve 345 can be installed on the main pipe 341. When there are multiple branch pipes 342, the synchronization valve 345 can be connected to each branch pipe 342 to ensure that the vibration damping unit 1 corresponding to different branch pipes 342 can achieve synchronous lifting and lowering, thereby improving the accuracy of adjusting the lifting and lowering of the vibration damping unit 1.

[0046] In addition, such as Figures 1 to 8As shown, a relief valve 4 can also be installed between the first pipeline 31 and the second pipeline 32. The relief valve 4 can regulate the flow rate of hydraulic oil in the hydraulic system, thereby regulating the pressure in the hydraulic system and preventing the pressure in the hydraulic system from exceeding the preset value. Based on this, the safety of the hydraulic system can be improved.

[0047] In order to adjust the pressure in the hydraulic system in a timely manner, such as Figures 1 to 8 As shown, a pressure sensor 7 for detecting the pressure inside the pipeline can also be installed on the first pipeline 31. The pressure sensor 7 is connected to the relief valve 4. Based on the data detected by the pressure sensor 7, the operator can adjust the opening of the relief valve 4 as needed, thereby achieving the effect of regulating the medium pressure of the hydraulic system.

[0048] In embodiments of this disclosure, such as Figures 1 to 8 As shown, the drive unit 3 may further include an oil tank 33, a motor 35, and an oil pump 36 connected to the output end of the motor 35. The first pipeline 31 and the second pipeline 32 are both connected to the oil tank 33, and the oil pump 36 is located in the first pipeline 31. For example, when the height of the vibration damping unit 1 needs to be increased, the motor 35 starts, causing the oil pump 36 to drive the hydraulic oil in the oil tank 33 through the first pipeline 31 and the connecting pipeline 34 into the adjusting unit 2. When the height of the vibration damping unit 1 needs to be decreased, the hydraulic oil flowing out of the adjusting unit 2 flows back into the oil tank 33 through the connecting pipeline 34 and the second pipeline 32. The rising speed of the vibration damping unit 1 can be adjusted according to the rotational speed of the motor 35.

[0049] Among them, such as Figures 1 to 8 As shown, an oil suction filter 5 can be installed on the first pipeline 31. The oil suction filter 5 can be installed between the oil pump 36 and the oil tank 33 to filter the hydraulic oil entering the first pipeline 31 from the oil tank 33, preventing impurities such as particulate matter in the hydraulic oil from entering the pipeline, ensuring the cleanliness of the hydraulic system, and improving the service life of the components in the hydraulic system.

[0050] In addition, such as Figures 1 to 8 As shown, a level sensor 6 can be installed inside the oil tank 33. The level sensor 6 can detect the amount of hydraulic oil in the oil tank 33 to prevent the oil level in the oil tank 33 from being too high or too low, thus ensuring the normal operation of the hydraulic system.

[0051] In embodiments of this disclosure, such as Figures 1 to 8As shown, two adjustment units 2 can be configured, each connected to a different damping unit 1 and both connected to the drive unit 3. The two adjustment units 2 are used for either the front or rear suspension of the suspension structure. That is, the two adjustment units 2 can adjust the two damping units 1 on the front suspension or the two damping units 1 on the rear suspension. This ensures that the length of the pipelines controlling the lifting and lowering of different damping units 1 in the hydraulic system remains as consistent as possible, making the lifting and lowering of different damping units 1 synchronized and improving the control accuracy of the hydraulic system.

[0052] A second aspect of this disclosure provides a vehicle including the aforementioned hydraulic system. Furthermore, it should be noted that this vehicle possesses all the beneficial effects of the aforementioned hydraulic system, which will not be elaborated upon here.

[0053] In summary, this disclosure exemplarily illustrates the operation of the two damping units 1 on the front suspension (rear suspension) controlled by the drive unit 3 and the adjustment unit 2.

[0054] For example, the two vibration damping units 1 can be the first vibration damping unit and the second vibration damping unit, respectively. Correspondingly, the branch pipe 342 connected to the first vibration damping unit can be the first branch pipe, and the branch pipe connected to the second vibration damping unit can be the second branch pipe. The first valve body 311 can be a one-way valve, and the second valve body 321 and the third valve body 343 can be two-position two-way solenoid valves.

[0055] like Figure 3 As shown, when the first and second vibration damping units need to be raised simultaneously, the third valve bodies 343 on both the first and second branch pipes are in the open state, while the second valve body 321 on the second pipeline 32 is in the open state. The motor 35 starts, driving the oil pump 36 to draw hydraulic oil from the oil tank 33 into the first pipeline 31. The hydraulic oil in the first pipeline 31 enters the main pipe 341 after passing through the first valve body 311. The hydraulic oil in the main pipe 341 can pass through the one-way throttle valve 344 and the synchronization valve 345 ( Figure 3 After passing through the first and second branch pipes respectively, the hydraulic oil enters the adjustment chamber 231 of the adjustment unit 2 corresponding to the different branch pipes. The hydraulic oil gathers in the adjustment chamber 231 and pushes the adjustment component 22 to move towards the outside of the adjustment body 21, so as to increase the height of the damping unit 1 connected to the adjustment component 22, thereby ensuring that the two damping units 1 rise at the same time.

[0056] like Figure 4As shown, when the first and second damping units need to descend simultaneously, the third valve bodies 343 on both the first and second branch pipes are open, the second valve body 321 on the second pipe 32 is also open, the motor 35 is de-energized, and the hydraulic oil in the adjustment chambers 231 of the two damping units 1 flows into the first and second branch pipes respectively under the gravity of the vehicle body, and converges in the main pipe 341, passing through the synchronization valve 345 ( Figure 4 After flowing through the one-way throttle valve 344 (not shown), the oil flows into the second pipeline 32 and finally back into the oil tank 33. At the same time, the adjusting element 22 in the two damping units 1 will move into the interior of the adjusting body 21, so that the two damping units 1 can descend at the same time.

[0057] like Figure 5 As shown, when it is necessary to increase the height of the first vibration damping unit, the third valve body 343 on the first branch pipe can be in the open state, while the second valve body 321 on the second pipe 32 and the third valve body 343 on the second branch pipe are both in the open state. The motor 35 starts, driving the oil pump 36 to draw the hydraulic oil in the oil tank 33 into the first pipe 31. The hydraulic oil in the first pipe 31 enters the main pipe 341 after passing through the first valve body 311. The hydraulic oil in the main pipe 341 passes through the one-way throttle valve 344 and the synchronization valve 345 ( Figure 5 After passing through the first branch pipe, the hydraulic oil enters the adjustment chamber 231 of the corresponding adjustment unit 2. The hydraulic oil gathers in the adjustment chamber 231 and pushes the adjustment component 22 toward the outside of the adjustment body 21 to increase the height of the vibration damping unit 1 connected to the adjustment component 22.

[0058] like Figure 6 As shown, when it is necessary to lower the height of the first damping unit, the third valve body 343 on the first branch pipe and the second valve body 321 on the second pipe 32 are both in the open state, the third valve body 343 on the second branch pipe is in the open state, the motor 35 is in the de-energized state, and the hydraulic oil in the adjustment chamber 231 of the adjustment unit 2 corresponding to the first branch pipe will flow out of the adjustment chamber 231 and into the first branch pipe under the action of the vehicle's gravity. Then the hydraulic oil will flow from the first branch pipe into the main pipe 341 and pass through the synchronization valve 345 ( Figure 6 After passing through the one-way throttle valve 344 (not shown), the water flows into the second pipeline 32 and eventually back into the oil tank 33. At the same time, the adjusting component 22 in the damping unit 1 corresponding to the first branch pipe will move into the adjusting body 21, thereby causing the damping unit 1 to descend.

[0059] like Figure 7As shown, when it is necessary to increase the height of the second vibration damping unit, the third valve body 343 on the second branch pipe can be in the open state, while the second valve body 321 on the second pipeline 32 and the third valve body 343 on the first branch pipe are both in the open state. The motor 35 starts, driving the oil pump 36 to draw the hydraulic oil in the oil tank 33 into the first pipeline 31. The hydraulic oil in the first pipeline 31 enters the main pipe 341 after passing through the first valve body 311. The hydraulic oil in the main pipe 341 passes through the one-way throttle valve 344 and the synchronization valve 345 ( Figure 7 After passing through the second branch pipe (not shown), the hydraulic oil enters the adjustment chamber 231 of the corresponding adjustment unit 2. The hydraulic oil gathers in the adjustment chamber 231 and pushes the adjustment component 22 toward the outside of the adjustment body 21 to increase the height of the vibration damping unit 1 connected to the adjustment component 22.

[0060] like Figure 8 As shown, when it is necessary to lower the height of the second damping unit, the third valve body 343 on the second branch pipe and the second valve body 321 on the second pipe 32 are both in the open state, the third valve body 343 on the first branch pipe is in the open state, the motor 35 is in the de-energized state, and the hydraulic oil in the adjustment chamber 231 of the adjustment unit 2 corresponding to the second branch pipe will flow out of the adjustment chamber 231 and into the second branch pipe under the action of the vehicle's gravity. Then the hydraulic oil will flow from the second branch pipe into the main pipe 341 and pass through the synchronization valve 345 ( Figure 8 After passing through the one-way throttle valve 344 (not shown), the water flows into the second pipeline 32 and eventually back into the oil tank 33. At the same time, the adjusting component 22 in the damping unit 1 corresponding to the second branch pipe will move into the adjusting body 21, thereby causing the damping unit 1 to descend.

[0061] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0062] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0063] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A hydraulic system for a suspension structure, characterized by, The hydraulic system comprises: a damping unit; an adjusting unit telescopically connected to the damping unit, used for adjusting the lifting of the damping unit; a driving unit connected to the adjusting unit, used for adjusting the telescoping of the adjusting unit. The adjusting unit comprises an adjusting body and an adjusting member at least partially located in the adjusting body, the adjusting member is in series with the spring of the damping unit, and the driving unit is connected to the adjusting member to adjust the length of the adjusting member extending out of the adjusting body.

2. The hydraulic system of claim 1, wherein, The adjusting body has a cavity inside, the adjusting member comprises a first end and a second end arranged oppositely, the first end is in series with the spring of the damping unit, and the second end is located in the cavity; 3. The hydraulic system of claim 2, wherein, The second end and the inner wall of the cavity form an adjusting cavity in communication with the driving unit, and the driving unit adjusts the size of the adjusting cavity by injecting or removing hydraulic oil into or out of the adjusting cavity. The driving unit comprises a first pipeline, a second pipeline and a communication pipeline, the first pipeline and the second pipeline are arranged in parallel and connected to the communication pipeline to be connected to the adjusting unit in an on-off manner; 4. The hydraulic system of claim 1, wherein, The first pipeline is used for inputting hydraulic oil into the adjusting unit, and the second pipeline is used for discharging hydraulic oil in the adjusting unit. The first pipeline is provided with a first valve body, and the second pipeline is provided with a second valve body; 5. The hydraulic system of claim 4, wherein, The first valve body is in communication with the communication pipeline when the damping unit rises and is disconnected from the communication pipeline when the damping unit descends; and the second valve body is disconnected from the communication pipeline when the damping unit descends and is in communication with the communication pipeline when the damping unit rises. The communication pipeline comprises a main pipeline and at least one branch pipeline in communication with the main pipeline, the main pipeline is in communication with the first pipeline and the second pipeline respectively, and each branch pipeline is connected to one adjusting unit; 6. The hydraulic system of claim 4, wherein, Each branch pipeline is provided with a third valve body, and / or the main pipeline is provided with a one-way throttling valve. The main pipeline is provided with a synchronization valve.

7. The hydraulic system of claim 6, wherein, An overflow valve is arranged between the first pipeline and the second pipeline.

8. The hydraulic system of claim 4, wherein, A pressure sensor for detecting the pressure in the pipeline is further arranged on the first pipeline, and the pressure sensor is in signal connection with the overflow valve.

9. The hydraulic system of claim 8, wherein, The driving unit further comprises an oil tank, a motor and an oil pump connected to the output end of the motor, the first pipeline and the second pipeline are in communication with the oil tank, and the oil pump is arranged on the first pipeline.

10. The hydraulic system of claim 4, wherein, An oil suction filter is arranged on the first pipeline.

11. The hydraulic system of claim 10, wherein, A liquid level sensor is arranged in the oil tank.

12. The hydraulic system of claim 10, wherein, The adjusting unit is configured with two, two adjusting units are connected to different damping units and are connected to the driving unit; 13. The hydraulic system of any one of claims 1-12, wherein, The two adjusting units are used for the front suspension or the rear suspension of the suspension structure. The hydraulic system comprises any one of claims 1-13.

14. A vehicle characterized by comprising: ​

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