CN217145565U - Hydraulic suspension system and automobile - Google Patents

Abstract

The application provides a hydraulic suspension system and car, hydraulic suspension system include the suspension unit, and the suspension unit includes hydraulic pressure pipeline and two at least hydraulic actuator, and hydraulic actuator includes: the energy accumulator comprises a cylinder barrel, a piston piece, a piston rod and an energy accumulator, wherein a sliding cavity is arranged on the cylinder barrel connected with a vehicle body, the piston piece is arranged in the sliding cavity in a sliding mode, and the sliding cavity is divided into an upper cavity and a lower cavity by the piston piece; one end of the piston rod is connected with the piston piece, and the other end of the piston rod is connected with the axle; an energy storage cavity and a separator are arranged in the energy accumulator, the separator divides the energy storage cavity into a liquid cavity and an air cavity for storing air, and the liquid cavity is communicated with the upper cavity; the hydraulic pipeline connects the upper chambers. Hydraulic suspension system and car in this application through setting up a plurality of hydraulic actuator and utilize hydraulic pressure pipeline to communicate each hydraulic actuator's epicoele, have improved vehicle bearing capacity and shock resistance, can compromise the ride comfort and the stationarity of operation of vehicle simultaneously, reduce single round impact load, improve tire earthing nature.

Description

Hydraulic suspension system and automobile

Technical Field

The utility model relates to an automotive suspension technical field especially relates to a hydraulic suspension system and car.

Background

Currently, air bags, coil springs, leaf springs, etc. are mostly used as elastic elements of vehicle suspensions, and besides the elastic elements, the vehicle suspensions are also matched with shock absorbers to provide damping, and are generally provided with stabilizer bars for lateral stability.

The engineering machinery and the heavy truck have large load capacity change, and a plate spring suspension is mostly adopted, but because the empty-load ratio of the vehicle is large, the bearing capacity and the comfort of the plate spring suspension can not be simultaneously considered, and particularly, the plate spring suspension has higher requirements on installation space of the vehicle with multiple shafts and shorter wheelbase. And to the special vehicle of heavy load that adopts leaf spring suspension, its operational environment is very abominable, and the empty full load ratio of vehicle is very big, how compromise suspension bearing capacity and vehicle travelling comfort simultaneously, improves the shock resistance effect, improves damping shock attenuation performance, improves suspension life and becomes the problem of awaiting urgent need solving.

SUMMERY OF THE UTILITY MODEL

In view of this, the application provides a hydraulic suspension system for solve the problem that the suspension system among the prior art is poor, damping shock-absorbing performance is poor, suspension life is short.

In one possible design, the hydraulic suspension system includes a suspension unit including a hydraulic line and at least two hydraulic actuators, the hydraulic actuators including: the energy accumulator comprises a cylinder barrel, a piston piece, a piston rod and an energy accumulator, wherein a sliding cavity is arranged on the cylinder barrel, and the cylinder barrel is connected with a vehicle body; the piston piece is arranged in the sliding cavity in a sliding mode and divides the sliding cavity into an upper cavity and a lower cavity; the piston rod is connected with the piston piece and is arranged in the lower cavity in a sliding mode, and one end, far away from the piston piece, of the piston rod is connected with the axle; an energy storage cavity and a separator are arranged in the energy accumulator, the separator divides the energy storage cavity into a liquid cavity and an air cavity for storing air, and the liquid cavity is communicated with the upper cavity; the hydraulic pipeline connects the upper chambers.

In a possible design, the energy accumulator is integrated with the piston rod, the energy storage cavity is arranged in the piston rod, the separator is arranged in the energy storage cavity in a sliding mode, a first damping valve is arranged at the joint of the piston rod and the piston, and the upper cavity is communicated with the liquid cavity through the first damping valve.

In one possible design, the hydraulic suspension system further comprises a gas tank, and the gas tank is communicated with the gas cavity through a pipeline.

In one possible design, the first damping valve is an asymmetric damping valve, the damping force generated by the first damping valve on the liquid entering the upper cavity from the liquid cavity is F1, and the damping force generated by the first damping valve on the liquid entering the liquid cavity from the upper cavity is F2, and F1> F2.

In one possible design, the energy accumulator is arranged outside the piston rod, a hollow channel is arranged in the piston rod, a first damping valve is arranged at the joint of the piston rod and the piston piece, and the upper cavity and the hollow channel are sequentially communicated with a liquid cavity of the energy accumulator.

In one possible design, a second damping valve is arranged between the liquid chamber and the hollow channel.

In a possible design, an opening communicated with the upper cavity is formed in the side wall of the cylinder barrel close to one end of the upper cavity, and the liquid cavity of the energy accumulator is communicated with the upper cavity through the opening.

In one possible design, a third damping valve is arranged on the hydraulic line.

In one possible design, the hydraulic suspension system includes two sets of suspension units, the two sets of suspension units are respectively arranged on the left side and the right side of the vehicle body, and each hydraulic actuator in the suspension units is respectively connected with the axles on different axles.

The application also provides an automobile comprising the hydraulic suspension system of any one of the above. It clearly has the advantages of a hydraulic suspension system.

The hydraulic suspension system and the automobile in the application have the advantages that:

the hydraulic suspension system in this application is through setting up a plurality of hydraulic actuator and utilizing hydraulic pressure pipeline to communicate each hydraulic actuator's epicoele, has improved vehicle bearing capacity and shock resistance, can compromise the ride comfort and the stationarity of operation of vehicle simultaneously, reduces single round impact load, improves tire earthing nature.

And the energy accumulator communicated with the upper cavity further improves the bearing capacity of the hydraulic suspension system, and increases the redundancy of the impact borne by the hydraulic actuator, thereby improving the structural strength and the service life of the hydraulic actuator.

Additional features and advantages of embodiments of the present application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of embodiments of the present application. The objectives and other advantages of the embodiments of the application will be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a schematic structural diagram of a hydraulic suspension system provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram (one) of a suspension unit provided in an embodiment of the present application;

FIG. 3 is a schematic diagram of a hydraulic actuator according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram (two) of a suspension unit provided in the embodiment of the present application;

fig. 5 is a schematic structural diagram (three) of a suspension unit provided in an embodiment of the present application; fig. 6 is a schematic structural diagram (four) of a suspension unit provided in an embodiment of the present application; fig. 7 is a schematic structural diagram (v) of a suspension unit provided in an embodiment of the present application. Reference numerals:

100-a hydraulic suspension system;

110-a suspension unit;

200-a vehicle body;

210-axle;

1-a hydraulic actuator;

11-a cylinder barrel;

111-a sliding cavity;

112-an upper chamber;

113-a lower cavity;

114-an opening;

115-a guide sleeve;

2-a piston member;

21-a first damping valve;

3-a piston rod;

31-a hollow channel;

4-an accumulator;

41-energy storage cavity;

411-the liquid chamber;

412-air cavity;

42-a separator;

43-a second damping valve;

5-hydraulic lines;

51-a third damping valve;

6-gas tank.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

Detailed Description

For better understanding of the technical solutions of the present application, the following detailed descriptions of the embodiments of the present application are provided with reference to the accompanying drawings.

It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be noted that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.

The following describes a specific embodiment of a hydraulic suspension system according to an embodiment of the present application.

Currently, air bags, coil springs, leaf springs, etc. are mostly used as elastic elements of vehicle suspensions, and besides the elastic elements, the vehicle suspensions are also matched with shock absorbers to provide damping, and are generally provided with stabilizer bars for lateral stability.

Passenger car chassis space is compact, and the integrated level requirement to the suspension is higher, and along with passenger car intelligent development, the chassis suspension is the electrical system that also more and more adopts, and it is automatically controlled air suspension system to adopt more at present, and the system includes parts such as air bag, bumper shock absorber, stabilizer bar, and the part quantity is more, and it is great to occupy the chassis space, influences the chassis and arranges the space.

The loading capacity of engineering machinery and heavy truck automobiles changes greatly, plate spring suspensions are mostly adopted, but because the empty-load ratio of the vehicles is very large, the loading capacity and the comfort of the plate spring suspensions cannot be simultaneously considered, and particularly, the plate spring suspensions have higher requirements on installation space for vehicles with multiple shafts and shorter wheelbases.

To the special vehicle of heavy load that adopts leaf spring suspension, its operational environment is very abominable, and the empty full load ratio of vehicle is very big, how compromise suspension bearing capacity and vehicle travelling comfort simultaneously, improves the shock resistance effect, improves the life of damping shock attenuation performance and suspension and becomes the problem that awaits a urgent need to solve.

The passenger train adopts air suspension for pursuing the travelling comfort more, nevertheless operates the stability and often receives the restriction, can't satisfy the continuous improvement that requires in each side of vehicle travelling comfort, security, along with vehicle suspension initiative, intelligent development, the slow shortcoming of air suspension response is practical utility model shows more, can't satisfy vehicle suspension quick response's control demand for the promotion of suspension performance receives very big restriction. The general rear axle of passenger train bears load great, consider installation space and the restriction of controlling the stability requirement, the rear axle adopts C type bracket to support 4 gasbags usually, satisfy bearing capacity, increase the gasbag arrangement interval simultaneously, but the roll rigidity that air suspension provided is still limited, still need match stabilizer bar, but the roll rigidity that stabilizer bar provided is linear, the diameter of stabilizer bar also can infinitely thicken, under the condition that adopts C to ask the structure, the vehicle is operated the stability and can not be brought and is promoted by a wide margin, the weight that C held in the palm simultaneously accounts for more than 50% of whole air suspension, the lightweight design demand of suspension system has greatly been influenced. In addition, since the air suspension uses a gas medium, it cannot be used as a hardware terminal of the active suspension.

In conclusion, how to make the suspension system develop towards the direction of light weight, intellectualization, more comfort and more safety becomes the central importance of the development of the suspension system.

In one embodiment, referring to fig. 1 to 3, the hydraulic suspension system 100 includes a suspension unit 110, the suspension unit 110 includes a hydraulic pipeline 5 and at least two hydraulic actuators 1, and the hydraulic actuators 1 include: the energy accumulator comprises a cylinder barrel 11, a piston piece 2, a piston rod 3 and an energy accumulator 4, wherein a sliding cavity 111 is arranged on the cylinder barrel 11, and the cylinder barrel 11 can be connected with a vehicle body 200 through a lifting lug; the piston piece 2 is arranged in the sliding cavity 111 in a sliding way, and the sliding cavity 111 is divided into an upper cavity 112 and a lower cavity 113 by the piston piece 2; the piston rod 3 is connected with the piston element 2, the piston rod 3 is arranged in the lower cavity 113 in a sliding manner, and one end of the piston rod 3, which is far away from the piston element 2, is connected with the axle 210; an energy storage cavity 41 and a partition 42 are arranged in the energy accumulator 4, the partition 42 divides the energy storage cavity 41 into a liquid cavity 411 and an air cavity 412 for storing air, and the liquid cavity 411 is communicated with the upper cavity 112; the hydraulic line 5 communicates each upper chamber 112.

The hydraulic pipeline 5 can be any connecting pipeline, and has certain pressure-bearing capacity and sealing capacity, and the connecting form of the hydraulic pipeline 5 and various joints, the upper cavity 112, the energy accumulator 4 and the damping valve in the application can be threaded connection, flange connection or welding, so long as the oil leakage condition does not occur after connection is ensured. The hydraulic pipeline 5 and various joints in the application can adopt the O-shaped ring seal, the gasket seal or the combined gasket seal in general forms, as long as the sealing effect can be achieved. The number of the hydraulic lines 5 increases with the increase of the hydraulic actuators 1, the hydraulic lines 5 connect the upper chambers 112 of the hydraulic actuators 1 in the suspension unit 110, and when the upper chamber 112 of one of the hydraulic actuators 1 is compressed, the hydraulic oil stored in the upper chamber 112 can flow along the hydraulic line 5 to the upper chamber 112 of the adjacent hydraulic actuator 1.

The upper end of the cylinder barrel 11 can be fixedly connected with the connecting part on the vehicle body 200, and a lifting lug, a fork arm or a support column can be arranged at the upper end of the cylinder barrel 11 for convenient connection; the specific connection form of the cylinder 11 and the lifting lug can be welding, screw connection or other connection forms. Be provided with the piston chamber on the cylinder 11, the cross sectional shape in piston chamber can be circular, and the piston chamber can be followed vertical direction and extended, and piston spare 2 slides and sets up in the piston chamber, and it can reciprocate in the piston chamber.

One end of the piston rod 3 is connected with one end of the piston element 2 far away from the upper cavity 112, the other end of the piston rod 3 is connected with the axle 210, a lifting lug, a yoke or a pillar can be arranged at one end of the piston rod 3 connected with the axle 210, and the connection mode of the piston rod 3 and the lifting lug can be threaded connection, flange connection or welding.

The accumulator 4 is an energy storage device in a hydropneumatic system. The energy in the system is converted into compression energy or potential energy to be stored at a proper time, and when the system needs the energy, the compression energy or the potential energy is converted into hydraulic energy or air pressure and the like to be released, and the energy is supplied to the system again. When the system pressure is increased instantaneously, it can absorb the energy of the part to ensure the pressure of the whole system is normal. The accumulator 4 may be of a diaphragm type, a bladder type, a piston type or a metal bellows type as long as the function of storing gas at one end and storing liquid at the other end can be realized. The gas in the accumulator 4 may be an inert gas such as nitrogen. The gas chambers 412 of the accumulators 4 in each circuit may be pre-charged with different amounts of gas as required to provide different pressures at each gas chamber 412 in the circuit, or with the same amount of gas to provide the same pressure at each gas chamber 412 in the circuit. When the empty-full load ratio of the vehicle is not large, the same amount of gas can be pre-charged so as to reduce the volume of a single energy accumulator 4, the integration into the oil cylinder is facilitated, and the arrangement space is saved; when the empty/full load ratio of the vehicle is large, different amounts of gas can be precharged. When the vehicle is close to no-load, the low-pressure energy accumulator 4 plays a main role, and when the vehicle is close to full load, the high-pressure energy accumulator 4 plays a main role, so that the offset frequency change of the vehicle is reduced, and the comfort of the vehicle is improved.

In this embodiment, two hydraulic actuators 1 may be disposed on the front side and the rear side of the vehicle, respectively, and the upper chambers 112 of the front hydraulic actuators 1 and the upper chambers 112 of the rear hydraulic actuators 1 are connected by the hydraulic line 5, thereby forming a hydraulic circuit.

When an external excitation is applied to the front side hydraulic actuator 1, the piston rod 3 of the hydraulic actuator 1 on the side close to the front shaft pushes the piston member 2 upward, and the upper chamber 112 is compressed. The oil stored in the upper chamber 112 is partially compressed into the fluid chamber 411 of the accumulator 4, partially flows out of the upper chamber 112 of the hydraulic actuator 1, and flows into the upper chamber 112 of the hydraulic actuator 1 on the side close to the rear axle through the hydraulic line 5 (which may pass through a damper valve and other parts on the way).

When the external excitation represents high-frequency small excitation, the speed that the piston rod 3 pushes the piston piece 2 to rise is high, the oil port pipe diameter between the upper cavity 112 and the hydraulic pipeline 5 is smaller than the inner diameter of the cylinder barrel 11, the throttling effect of the oil port can lead to the sharp rise of the pressure in the cavity, in order to solve the problem, the energy accumulator 4 is arranged in the embodiment, the energy accumulator 4 is communicated with the upper cavity 112, therefore, the oil on one side to be compressed can be rapidly absorbed by the energy accumulator 4, the sharp rise of the pressure in the upper cavity 112 is avoided, and the service life of the hydraulic actuator 1 is prolonged.

When the external excitation on the hydraulic actuator 1 on the front axle side is low-frequency large excitation, the piston rod 3 pushes the piston member 2 to ascend slowly, but the stroke is long, and the oil in the upper cavity 112 of the hydraulic actuator 1 close to the front axle side is partially absorbed by the energy accumulator 4, partially flows out of the upper cavity 112 of the hydraulic actuator 1 and flows into the upper cavity 112 of the hydraulic actuator 1 on the rear axle side through the hydraulic pipeline 5, so that the impact pressure is reduced, and the wheel grounding performance is improved. Specifically, to take the vehicle left side front wheel to roll the arch on the road as an example, the left side front wheel of vehicle is pressed in the arch, and the whole of vehicle can produce certain slope, and the left side rear wheel of vehicle can produce certain unsettled, this moment: the hydraulic actuator 1 on one side of the front axle is pressed, the piston rod 3 pushes the piston piece 2 to slowly rise, but the stroke is long, the hydraulic actuator 1 on one side of the front axle is close to, the oil part in the upper cavity 112 of the hydraulic actuator 1 is absorbed by the energy accumulator 4, and the part flows out of the upper cavity 112 of the hydraulic actuator 1 and flows into the upper cavity 112 of the hydraulic actuator 1 on one side of the rear axle through the hydraulic pipeline 5, so that the piston piece 2 of the hydraulic actuator 1 on one side of the rear axle descends, and further the piston rod 3 on one side of the rear wheel is pushed to descend, so that the rear wheel on the left side is changed into a grounding state from a suspension state, and the grounding property is improved.

To meet the requirement of compatibility of comfort and handling stability of the vehicle, the stabilizer bar may be removed after installation of the hydraulic suspension system 100 of the present application. At this point, the hydraulic suspension system 100 can be relied upon to provide the desired vertical stiffness of the vehicle, as well as the prevailing roll stiffness. Meanwhile, due to the hydraulic suspension system 100, the oil hydraulic pressure of the hydraulic suspension system changes in real time along with the posture and road conditions of the vehicle body 200, and the vertical stiffness and the roll stiffness can be changed in real time. For example, when the vehicle runs on a flat road surface, the piston rod 3 of the hydraulic actuator 1 is in a high-frequency small-amplitude fluctuation state, the amount of oil entering and exiting the energy accumulator 4 is small, the oil can be quickly absorbed by the energy accumulator 4, the impact transmitted to the vehicle body 200 from the road surface can be relieved, the vertical vibration can be quickly absorbed, and the vehicle body 200 of the vehicle is stable in posture and good in comfort.

In one embodiment, referring to fig. 2 and 3, the piston rod 3 is hollow and can be used as an air chamber 412 or an oil chamber, when the piston rod is used as the air chamber 412, the piston member 2 separates the oil end from the air end, and the upper end of the piston rod 3 is milled with a groove to communicate the upper chamber 112 with the lower chamber 113. The lower chamber 113 can now be seen as a small energy storage chamber 41, and the oil in the upper chamber 112 can enter the lower chamber 113 through a groove in the upper end of the piston rod 3 when it is pressurized.

In one embodiment, the accumulator 4 is integrally disposed with the piston rod 3, the energy storage chamber 41 is disposed in the piston rod 3, the partition 42 is slidably disposed in the energy storage chamber 41, the first damping valve 21 is disposed at the joint of the piston rod 3 and the piston member 2, and the upper chamber 112 is communicated with the fluid chamber 411 through the first damping valve 21.

Referring to fig. 2 and fig. 3, in the present embodiment, the piston rod 3 is hollow to form an energy storage chamber 41, and the separation chamber is slidably disposed in the energy storage chamber 41, at this time, the piston rod 3 not only plays a role of connecting the piston member 2 with the axle 210, but also plays a role of the energy accumulator 4, so as to greatly save the occupied space of the hydraulic actuator 1, and make the whole hydraulic suspension system 100 lighter. First damping valve 21 sets up on piston spare 2, and its both ends that can communicate piston spare 2, and first damping valve 21 adopts the thin slice, spring, the stopper etc. in different thickness, diameter, throttle aperture, and the combination is together according to the design needs to provide required damping force, according to the functioning speed of piston rod 3, the nonconformity of damping valve aperture can realize damped controllable regulation, and then improves the vehicle travelling comfort.

In one embodiment, the hydraulic suspension system 100 further comprises an air tank 6, and the air tank 6 is communicated with the air chamber 412 through a pipeline.

Referring to fig. 4, the gas tank 6 may be any closed tank body, the side wall of the cylinder 11 is provided with a hole, and the gas tank 6 is communicated with the gas chamber 412 through the hole on the cylinder 11, so that the volume of the gas chamber 412 is increased, the action range of the hydraulic actuator 1 is enlarged, and the damping capacity and the use comfort of the hydraulic actuator 1 are improved.

In one embodiment, the first damping valve 21 is an asymmetric damping valve, the damping force generated by the first damping valve 21 on the liquid entering the upper chamber 112 from the liquid chamber 411 is F1, and the damping force generated by the first damping valve 21 on the liquid entering the liquid chamber 411 from the upper chamber 112 is F2, and F1> F2.

The first damping valve 21 can generate asymmetric damping force, when the piston rod 3 extends out, oil enters the upper chamber 112 from the liquid chamber 411 through the first damping valve 21, the first damping valve 21 generates larger damping force to enable the piston rod 3 to slowly extend out, the force of the piston piece 2 impacting the guide sleeve 115 is reduced, the vehicle body 200 is restrained from jumping, and the vehicle frame posture is controlled; when the piston rod 3 retracts, the pressure of the upper cavity 112 rises, oil enters the liquid cavity 411 of the piston rod 3 through the first damping valve 21 and pushes the partition 42 to compress the space of the air cavity 412 (the air cavity 412 is compressed in the process, and the gas in the air cavity 412 absorbs energy when being compressed, so that a cushioning effect is achieved), the first damping valve 21 generates a small damping force for the energy accumulator 4 to quickly absorb the redundant oil, the internal peak pressure of the hydraulic actuator 1 is reduced, the impact feeling is reduced, and the comfort is improved.

In one embodiment, the accumulator 4 is disposed outside the piston rod 3, the hollow passage 31 is disposed inside the piston rod 3, the first damping valve 21 is disposed at the joint of the piston rod 3 and the piston member 2, and the upper chamber 112, the hollow passage 31 and the liquid chamber 411 of the accumulator 4 are sequentially communicated.

Referring to fig. 5, in the present embodiment, a compressed rear portion of the liquid in the upper chamber 112 enters the hollow passage 31 and the liquid chamber 411 of the energy accumulator 4 through the first damping valve 21, and at this time, the hollow passage 31 in the piston rod 3 and the liquid chamber 411 of the energy accumulator 4 are equivalent to an integral chamber, which obviously increases the volume of the liquid chamber 411 of the energy accumulator 4, not only enhances the comfort, i.e., the shock resistance, of the hydraulic actuator 1, but also improves the stability and the service life of the hydraulic actuator 1.

In one embodiment, a second damping valve 43 is disposed between the liquid chamber 411 and the hollow passage 31.

Referring to fig. 6, in the present embodiment, a second damping valve 43 is disposed between the liquid chamber 411 and the hollow channel 31, and the second damping valve 43 and the first damping valve 21 both have the same function and are used for adjusting the passing speed of the liquid. The specific location of the second damping valve 43 may be the outlet end of the accumulator 4 with the liquid chamber 411, and the other end of the second damping valve 43 is connected to a common pipeline, which is communicated with the hollow channel 31. The provision of the second damping valve 43 can quickly absorb vibrations.

In one embodiment, an opening 114 is formed in a side wall of the cylinder 11 near one end of the upper chamber 112 to communicate with the upper chamber 112, and the fluid chamber 411 of the accumulator 4 communicates with the upper chamber 112 through the opening 114.

Referring to fig. 7, in the present embodiment, the energy accumulator 4 is externally connected to the outside of the cylinder 11, which not only facilitates the disassembly and assembly, but also improves the strength of the piston rod 3 because the fluid chamber 411 of the energy accumulator 4 is communicated with the upper chamber 112 through the opening 114 without opening a hole or opening the hollow channel 31 in the piston rod 3 in the hydraulic actuator 1, and in some cases, the energy accumulator 4 may be externally connected with a damping valve to adjust the flow rate of the fluid.

In one embodiment, a third damping valve 51 is provided in the hydraulic line 5.

Referring to fig. 2, the third damping valve 51 is provided to absorb vibration rapidly, similar to the first damping valve 21 and the second damping valve 43.

In one embodiment, the hydraulic suspension system 100 includes two sets of suspension units 110, the two sets of suspension units 110 are respectively disposed on the left and right sides of the vehicle body, and the hydraulic actuators 1 in the suspension units 110 are respectively connected to the axles 210 on different axles.

In this implementation, hang unit 110 and be provided with two sets ofly, each hydraulic actuator 1 in the unit 110 that hangs is connected with the epaxial axle 210 of different axles to the diaxon car is the example, and every group hangs unit 110 and includes two hydraulic actuator 1, and two hydraulic actuator 1 are connected with the front axle and the rear axle of car respectively for the car atress is more even, improves and drives the comfort level. It will be appreciated that when the vehicle is a multi-axle vehicle, each set of suspension units 110 includes the same number of hydraulic actuators 1 as the number of axles, each hydraulic actuator 1 being connected to a respective axle.

In this embodiment, when the vehicle is in a working condition such as turning, the hydraulic actuator 1 on one side of the vehicle is compressed, the piston rod 3 moves towards the direction close to the cylinder 11, the hydraulic actuator 1 on the other side is stretched, the piston rod 3 extends towards the direction far away from the cylinder 11, the piston rod 3 is in a low-frequency large-amplitude motion state, and a large amount of oil enters and exits the energy accumulator 4.

In the hydraulic actuator 1 on the side where the piston rod 3 is compressed, the gas in the accumulator 4 is compressed, the pressure rises, the pressure of the loop oil liquid rises, and the force for inhibiting the piston rod 3 from being compressed is generated; in the hydraulic actuator 1 on the side where the piston rod 3 is stretched, the hydraulic fluid in the accumulator 4 flows out, the pressure decreases, the circuit hydraulic pressure decreases, and a force for suppressing the stretching of the piston rod 3 is generated.

The forces on both sides form a moment against the roll of the vehicle body 200, which aims to reduce the roll angle of the vehicle body 200 of the vehicle, keeping the posture of the vehicle body 200 stable. The larger the turning amplitude of the vehicle is, the larger the acting force generated on one side is, and the larger the moment is. Namely, the hydraulic suspension system 100 can provide the required anti-roll moment in real time according to the vehicle condition, and adaptively adjust the anti-roll moment.

Referring to fig. 1, the present application further provides a vehicle including a hydraulic suspension system 100 as described in any one of the above embodiments, so that the vehicle has the advantages of the hydraulic suspension system 100 as described above.

The hydraulic suspension system can be applied to Electric vehicles/Electric Vehicles (EV), Pure Electric vehicles (Pure Electric Vehicle/Battery Electric Vehicle, PEV/BEV for short), Hybrid Electric vehicles (HEV for short), Extended Range Electric vehicles (REEV) for short, Plug-in Hybrid Electric vehicles (PHEV) for short, New Energy vehicles (New Energy Vehicle) and the like.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. A hydraulic suspension system comprising a suspension unit including a hydraulic circuit and at least two hydraulic actuators, said hydraulic actuators comprising:

the automobile body is characterized by comprising a cylinder barrel, wherein a sliding cavity is formed in the cylinder barrel, and the cylinder barrel is connected with an automobile body;

the piston piece is arranged in the sliding cavity in a sliding mode and divides the sliding cavity into an upper cavity and a lower cavity;

the piston rod is connected with the piston piece and is arranged in the lower cavity in a sliding mode, and one end, far away from the piston piece, of the piston rod is connected with an axle;

the gas storage device comprises an energy storage device, wherein an energy storage cavity and a separator are arranged in the energy storage device, the separator divides the energy storage cavity into a liquid cavity and a gas cavity for storing gas, and the liquid cavity is communicated with the upper cavity;

the hydraulic pipeline is used for communicating the upper cavities;

and a third damping valve is arranged on the hydraulic pipeline.

2. The hydraulic suspension system according to claim 1, wherein the accumulator is integrally provided with the piston rod, the accumulator chamber is provided in the piston rod, the spacer is slidably provided in the accumulator chamber, a first damping valve is provided at a junction of the piston rod and the piston member, and the upper chamber is communicated with the fluid chamber through the first damping valve.

3. The hydraulic suspension system according to claim 1 or 2, further comprising a gas tank communicating with the gas chamber through a line.

4. The hydraulic suspension system of claim 2, wherein the first damping valve is an asymmetric damping valve, the first damping valve generating a damping force of F1 for fluid entering the upper chamber from the fluid chamber, the first damping valve generating a damping force of F2 for fluid entering the fluid chamber from the upper chamber, F1> F2.

5. The hydraulic suspension system according to claim 1, wherein the accumulator is disposed outside the piston rod, a hollow passage is disposed in the piston rod, a first damping valve is disposed at a junction of the piston rod and the piston member, and the upper chamber, the hollow passage and the fluid chamber of the accumulator are sequentially communicated.

6. The hydraulic suspension system of claim 5, wherein a second damping valve is disposed between the fluid chamber and the hollow passage.

7. The hydraulic suspension system of claim 1, wherein an opening is provided in a side wall of the cylinder near one end of the upper chamber to communicate with the upper chamber, and the fluid chamber of the accumulator communicates with the upper chamber through the opening.

8. The hydraulic suspension system according to claim 1, wherein the hydraulic suspension system includes two sets of suspension units provided on left and right sides of a vehicle body, respectively, and each of the hydraulic actuators in the suspension units is connected to the axle on a different axle, respectively.

9. An automobile, characterized in that it comprises a hydraulic suspension system according to any one of claims 1-8.

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