Energy accumulator, suspension system and vehicle

Abstract

The utility model relates to an energy accumulator, a suspension system and a vehicle. The energy accumulator comprises a shell and a balance channel. A first chamber and a second chamber which are independent from each other are formed in the shell; one end of the balance channel is connected with the first chamber, and the other end of the balance channel is connected with the second chamber; when the pressure difference between the first cavity and the second cavity is larger than a set threshold value, the balance channel is opened, and the first cavity is communicated with the second cavity. The energy accumulator can provide stable system back pressure for the hydraulic device, and is simple in structure and high in integration level.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage devices, and more specifically, to an accumulator, a suspension system and a vehicle. Background Art

[0002] In the vehicle suspension system, it is usually necessary to connect an accumulator. For some hydraulic active suspensions, two accumulators need to be connected. Since the two accumulators work independently and the pressure of the accumulator changes nonlinearly with the volume, the system back pressure is different at different suspension positions, which affects the damping force. Especially for the air spring suspension, the pressure change of the accumulator will affect the suspension system frequency deviation, making the design of the entire suspension system more complicated.

[0003] In view of this, it is necessary to design an accumulator that can effectively stabilize the system back pressure. Utility Model Content

[0004] An object of the present invention is to provide an accumulator, a suspension system and a vehicle to solve at least one of the problems of the background technology.

[0005] According to a first aspect of the utility model, an accumulator is provided, comprising:

[0006] A housing, wherein a first chamber and a second chamber independent of each other are formed in the housing;

[0007] a balancing channel, one end of which is connected to the first chamber, and the other end of which is connected to the second chamber;

[0008] When the pressure difference between the first chamber and the second chamber is greater than a set threshold, the balancing channel is opened, and the first chamber is communicated with the second chamber.

[0009] Optionally, the accumulator further comprises a valve seat assembly, wherein the valve seat assembly is arranged in the shell so as to separate the first chamber and the second chamber in the shell.

[0010] Optionally, the balancing channel is formed on the valve seat assembly.

[0011] Optionally, the valve seat assembly includes a valve, which is arranged in the balancing channel and is used to open or close the balancing channel.

[0012] Optionally, the valve is a one-way valve, at least two balancing channels are provided, and the opening directions of the corresponding one-way valves in at least two balancing channels are opposite.

[0013] Optionally, the one-way valve comprises a one-way valve seat, a spring and a steel ball;

[0014] The one-way valve seat is assembled in the balancing channel, and the two ends of the spring are respectively fixed on the one-way valve seat and the steel ball. The spring is provided with a pre-pressure so that the steel ball blocks the balancing channel.

[0015] When the pressure difference is greater than the pre-pressure, the steel ball can move to a position to open the balance channel.

[0016] Optionally, a notch that can communicate with the balancing channel is provided on the one-way valve seat, and the steel ball can block or leave the notch to close and open the balancing channel.

[0017] Optionally, the valve seat assembly includes a valve body, the valve body is a hollow structure, and the hollow structure forms a third chamber;

[0018] When the balancing passage is closed, the third chamber can be used to balance the pressure difference between the first chamber and the second chamber.

[0019] Optionally, the valve seat assembly further includes an energy storage component, which is capable of closing the hollow structure to form the third chamber and separate the first chamber from the second chamber.

[0020] Optionally, the energy storage assembly includes two bellows, which are respectively disposed at two ends of the hollow structure and form the third chamber together with the hollow structure.

[0021] Optionally, the energy storage assembly further includes two sealing covers, which are disposed at both ends of the two bellows to seal the third chamber.

[0022] Optionally, the energy storage assembly includes two rubber bags, which are respectively arranged at two ends of the hollow structure and form the third chamber together with the hollow structure.

[0023] Optionally, the third chamber is provided with an air passage communicating with the outside of the shell, and the third chamber can be filled and discharged with gas through the air passage.

[0024] Optionally, the housing is provided with a first oil port communicating with the first chamber, and a second oil port communicating with the second chamber, and both the first oil port and the second oil port are used to connect with an external oil circuit.

[0025] Optionally, the accumulator further comprises a first joint and a second joint respectively provided at two ends of the shell, and the first oil port and the second oil port are respectively provided on the first joint and the second joint.

[0026] Optionally, a buffer is respectively provided at one end of the first joint and the second joint located in the shell to provide buffering for the energy storage assembly.

[0027] Optionally, a plurality of the balancing channels are provided, and when the pressure difference between the first chamber and the second chamber is greater than a set threshold, at least one of the balancing channels is opened.

[0028] According to a second aspect of the utility model, a suspension system is provided, comprising the accumulator described in the first aspect.

[0029] According to a third aspect of the utility model, a vehicle is provided, comprising the suspension system described in the second aspect.

[0030] One technical effect of the utility model is that, by providing a mutually independent first chamber, a second chamber, and a balancing channel connected to the first chamber and the second chamber, the first chamber and the second chamber can be connected and disconnected according to the pressure difference between the first chamber and the second chamber, thereby achieving pressure balance between the two chambers. The utility model has a simple structure, high integration, and low cost. When applied to a suspension system, it can effectively stabilize the back pressure of the suspension system.

[0031] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present utility model and, together with the description, are used to explain the principles of the present utility model.

[0033] Figure 1 This is one of the cross-sectional views of an accumulator provided by the utility model.

[0034] Figure 2 This is the second cross-sectional view of an accumulator provided by the utility model.

[0035] Figure 3 It is a schematic diagram of the appearance structure of a valve seat assembly provided by the utility model.

[0036] Figure 4 The utility model is a cross-sectional schematic diagram of a valve seat assembly.

[0037] Figure 5 It is a schematic diagram of a valve seat of a first one-way valve or a second one-way valve provided by the utility model.

[0038] Description of reference numerals:

[0039] 1. First sealing ring; 2. First joint; 3. First buffer ring; 4. First sealing cover; 5. First bellows; 6. Upper shell; 7. Valve body; 8. Lower shell; 9. Second joint; 10. Second sealing ring; 11. Second retaining ring; 12. Second buffer ring; 13. Second sealing cover; 14. Second bellows; 15. Welding pin; 16. First retaining ring; 17. First chamber; 18. Third chamber; 19. Second chamber; 20 (26) Sealing pin; 21 (27) Oil outlet; 22 (30) One-way valve seat; 23 (29) Notch; 24 (28) Steel ball; 25 (31) Spring; 32. Inner wall of valve body; 33. First oil port; 34. Second oil port; 35. Airway. DETAILED DESCRIPTION

[0040] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0041] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0042] Techniques and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the techniques and equipment should be considered part of the specification.

[0043] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0044] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0045] like Figures 1 to 5 As shown, according to the first aspect of the utility model, an accumulator is provided, comprising: a shell and a balancing channel, wherein a first chamber 17 and a second chamber 19 independent of each other are formed in the shell; one end of the balancing channel is connected to the first chamber 17, and the other end is connected to the second chamber 19; when the pressure difference between the first chamber 17 and the second chamber 19 is greater than a set threshold, the balancing channel is opened, and the first chamber 17 and the second chamber 19 are connected.

[0046] Specifically, in this embodiment, a first chamber 17 and a second chamber 19 which are independent of each other are provided in the shell, and the first chamber 17 and the second chamber 19 are connected by a balancing channel, so that when the pressure difference in the two chambers is greater than a set threshold value, the first chamber 17 and the second chamber 19 can be connected through the balancing channel, thereby achieving pressure balance in the first chamber 17 and the second chamber 19.

[0047] In practical applications, the first chamber 17 and the second chamber 19 of the accumulator can be connected to the oil circuit of the vehicle hydraulic device, then the first chamber 17 and the second chamber 19 are both hydraulic chambers, and the balance channel is a hydraulic oil channel. When the first chamber 17 and the second chamber 19 are both connected to the external oil circuit, there is a small pressure difference in the first chamber 17 and the second chamber 19, and the balance channel can be in a closed state. When one chamber is connected to the external oil circuit and the other chamber is disconnected from the external oil circuit, when the hydraulic oil flows into and out of the first chamber 17 or the second chamber 19, a certain pressure difference may be formed between the two hydraulic chambers, affecting the system back pressure of the hydraulic device.

[0048] When the pressure difference reaches the set threshold, the utility model can connect the first chamber 17 and the second chamber 19 through the balance channel, so that the air pressure balance is achieved between the two hydraulic chambers. The specific range of the set threshold can be set according to actual needs, and the opening of the balance channel can be achieved by mechanical control or electronic control. It has a simple structure, high integration, no need to equip additional equipment, low cost, and can effectively stabilize the back pressure of the suspension system.

[0049] Alternatively, if Figures 1 to 4 As shown, the accumulator further includes a valve seat assembly, which is disposed in the housing so as to separate the first chamber 17 and the second chamber 19 in the housing, thereby improving the integration inside the housing.

[0050] Alternatively, if Figures 2 to 4 As shown, the balancing channel is formed on the valve seat assembly.

[0051] Specifically, in this embodiment, the arrangement of the balancing channel enables the hydraulic oil inside the first chamber 17 to flow between the two chambers along a certain path when the first chamber 17 and the second chamber 19 are connected. The balancing channel is arranged on the valve seat assembly, which facilitates the production and processing of the balancing channel and reduces the processing difficulty.

[0052] Alternatively, if Figures 2 to 4 As shown, the valve seat assembly includes a valve, which is arranged in the balancing channel and is used to open or close the balancing channel.

[0053] Specifically, in this embodiment, the valve can be an electrically controlled valve, that is, a pressure detection device can be set in each of the two chambers. When the pressure difference in the two chambers reaches a set threshold, the valve can be controlled to open, so that the hydraulic oil in the chamber flows to the low-pressure hydraulic chamber to achieve the purpose of balancing the pressure difference. In another embodiment, a mechanical valve can also be used to open or close the valve by the pressure of the hydraulic oil itself, and the specific design can be based on actual needs.

[0054] Alternatively, if Figure 3 to Figure 4 As shown, the valve is a one-way valve, and at least two balancing channels are provided, and the opening directions of the corresponding one-way valves in at least two balancing channels are opposite.

[0055] Specifically, in this embodiment, a first one-way valve and a second one-way valve are respectively arranged in at least two balancing channels, and the opening directions of the first one-way valve and the second one-way valve are opposite, so that when the pressure in the first chamber 17 is greater than the pressure in the second chamber 19, the first one-way valve can be opened, and when the pressure in the second chamber 19 is greater than the pressure in the first chamber 17, the second one-way valve can be opened. The opening and closing of the balancing channel is controlled in the form of two one-way valves. On the one hand, the one-way valve has a simple structure, is easy to assemble, and has a low cost, and on the other hand, it is also easy to control.

[0056] Alternatively, if Figure 2 and Figure 5 As shown, the one-way valve includes a one-way valve seat 22 (30), a spring 25 (31) and a steel ball 24 (28); the one-way valve seat 22 (30) is assembled in the balance channel, and the two ends of the spring 25 (31) are respectively fixed on the one-way valve seat 22 (30) and the steel ball 24 (28), and the spring 25 (31) is provided with a pre-pressure so that the steel ball 24 (28) blocks the balance channel; when the pressure difference is greater than the pre-pressure, the steel ball 24 (28) can move to a position to open the balance channel. The one-way valve seat 22 (30) can also be provided with a notch 23 (29) that can communicate with the balance channel, and the steel ball 24 (28) can block or leave the notch 23 (29) to close and open the balance channel.

[0057] Specifically, in this embodiment, the one-way valve is in the form of a steel ball 24 (28) plus a spring 25 (31), and the one-way valve seat 22 (30) is assembled at one end of the balance channel so that the notch 23 (29) on the one-way valve seat 22 (30) can be connected to the flow channel. The diameter of the steel ball 24 (28) usually needs to be larger than the size of the notch 23 (29) to block the notch 23 (29) so that the one-way valve can be in a closed state. One end of the spring 25 (31) is pressed against the one-way valve seat 22 (30), and the other end is pressed against the steel ball 24 (28), and the spring 25 (31) has a certain pre-pressure, and stores a certain spring 25 (31) force, so that the steel ball 24 (28) can block the notch 23 (29) more reliably.

[0058] When the pressure difference between the first chamber 17 and the second chamber 19 reaches a set threshold, the pressure exceeds the preload of the spring 25 (31), causing the one-way valve to open, and the notch 23 (29) is connected to the balance channel, thereby connecting the first chamber 17 and the second chamber 19 to achieve the purpose of balancing the pressure difference. The notch 23 (29) forms an oil inlet of the balance channel, so that when the pressure difference between the two chambers exceeds the set threshold, the hydraulic oil can flow into the balance channel through the oil inlet at the notch 23 (29), and apply hydraulic pressure to the steel ball 24 (28) to exceed the preload of the spring 25 (31), so that the one-way valve opens, and the notch 23 (29) is connected to the balance channel, and the hydraulic oil flows into the low-pressure chamber from the oil outlet 21 (27) of the balance channel.

[0059] Alternatively, if Figures 2 to 4 As shown, the valve seat assembly includes a valve body 7, and the valve body 7 is a hollow structure, and the hollow structure forms a third chamber 18; when the balancing channel is closed, the third chamber 18 can be used to balance the pressure difference between the first chamber 17 and the second chamber 19.

[0060] Specifically, in this embodiment, the third chamber 18 can be set as an air chamber. When the first chamber 17 and the second chamber 19 are both connected to the oil circuit of the hydraulic device, there is a small pressure difference between the first liquid chamber and the second liquid chamber, and the balance channel is in a closed state. At this time, the third chamber 18 can balance the pressure difference between the two chambers through the change of volume. The volume change of the third chamber 18 can be compressed by an external structure and other operations.

[0061] In one embodiment, the balancing channel is disposed on the valve body 7, and the valve body 7 can be made of metal material or plastic. When metal material is used, the stability and service life of the valve body 7 can be improved, and the flow channel can be easily processed.

[0062] When processing a balancing channel with a bent flow direction, a straight channel passing through both ends of the valve body 7 can be first processed, and then the oil inlet and the oil outlet 21 (27) can be processed respectively at the positions close to the two ends of the straight channel. The port near the oil outlet 21 (27) can be sealed with a sealing pin 20 (26) to prevent the hydraulic oil from flowing out from there and guide the hydraulic oil to flow out from the oil outlet 21 (27). Figure 4 .

[0063] In addition, the valve body 7 is a hollow structure, and the inner wall 32 of the valve body can be set at a certain angle, refer to Figure 4 The initial volume of the third chamber 18 is adjusted by adjusting the angle range. Taking the air cavity as an example, its initial volume needs to be calculated based on factors such as the minimum oil pressure of the hydraulic device, the gas volume of the accumulator, and the inflation pressure. The utility model does not impose any restrictions on this.

[0064] Alternatively, if Figures 1 to 4 As shown, the valve seat assembly further includes an energy storage component, which can close the hollow structure to form the third chamber 18 and separate the first chamber 17 and the second chamber 19 .

[0065] Specifically, in this embodiment, when the balancing channel is closed, the pressure in the first chamber 17 and the second chamber 19 is low, and the energy storage component compresses the third chamber 18 to balance the pressure in the two chambers, thereby reducing the pressure difference.

[0066] In one embodiment, the housing includes an upper housing 6 and a lower housing 8, so that the valve body 7 assembly and the energy storage assembly can be assembled inside the housing. The housing can be a steel housing, and after assembly, the valve body 7 assembly is fixed between the upper housing 6 and the lower housing 8 by welding nails 15.

[0067] Alternatively, if Figure 1 to Figure 2 As shown, the energy storage assembly includes two bellows, which are respectively arranged at the two ends of the hollow structure and form the third chamber 18 with the hollow structure. In addition, the energy storage assembly also includes two sealing covers, which are arranged at the two ends of the two bellows to seal the third chamber 18.

[0068] Specifically, in this embodiment, the energy storage assembly is two bellows and a sealing cover, which are respectively assembled at both ends of the valve body 7 to seal the third chamber 18 and separate the first chamber 17 and the second chamber 19. In order to facilitate the communication between the first chamber 17 (first hydraulic chamber) and the second chamber 19 (second hydraulic chamber) and the external oil circuit, the housing is provided with a first oil port 33 communicating with the first chamber 17 and a second oil port 34 communicating with the second chamber 19. The actual working principle can refer to the following working process.

[0069] When the first oil port 33 and the second oil port 34 are both connected to the oil circuit of the hydraulic device and the balance channel is in a closed state, if the hydraulic oil enters the first hydraulic chamber through the first oil port 33, the pressure of the first hydraulic chamber increases, and the first sealing cover 4 pushes the first bellows 5 to move toward the second hydraulic chamber, compressing the middle air chamber (the third chamber 18) to increase the pressure of the air chamber, and then pushes the second sealing cover 13 to move toward the second oil port 34 through the second bellows 14, discharges the hydraulic oil in the second hydraulic chamber, and achieves pressure balance between the two hydraulic chambers.

[0070] If the hydraulic oil enters the second hydraulic chamber through the second oil port 34, the pressure in the second hydraulic chamber increases, and the second sealing cover 13 pushes the second bellows 14 to move toward the first hydraulic chamber, compressing the air chamber in the middle, so that the pressure in the air chamber increases, and then pushes the first sealing cover 4 to move toward the first oil port 33 through the first bellows 5, discharges the hydraulic oil in the first hydraulic chamber, and achieves pressure balance between the two hydraulic chambers.

[0071] In another embodiment, when the pressure difference between the first hydraulic chamber and the second hydraulic chamber exceeds a set threshold value: if the first oil port 33 is disconnected, the oil in the first hydraulic chamber is sealed, and when hydraulic oil enters the second hydraulic chamber, the second sealing cover 13 moves up and pushes the second bellows 14 to compress the air chamber. When the second sealing cover 13 moves to the maximum position, the volumes of the two hydraulic chambers no longer change, and when hydraulic oil still flows into the second oil port 34, the pressure in the second hydraulic chamber further increases, and the pressure in the first hydraulic chamber remains unchanged, so that the pressure difference between the two hydraulic chambers gradually increases. When it exceeds the set threshold value, the balancing channel is opened, thereby connecting the first hydraulic chamber and the second hydraulic chamber, and the hydraulic oil in the second hydraulic chamber flows into the first hydraulic chamber through the balancing channel, thereby suppressing the further increase of the hydraulic oil in the second hydraulic chamber, stabilizing the pressure difference between the first hydraulic chamber and the second hydraulic chamber, and avoiding excessive pressure at the second oil port 34.

[0072] If the first oil port 33 is disconnected and oil continues to be discharged from the second oil port 34, or if the second oil port 34 is disconnected and oil continues to flow into or be discharged from the first oil port 33, the working principle is similar to that in the above embodiment and will not be described again.

[0073] In one embodiment, the bellows is made of metal material, and the sealing covers can be fixed to both ends of the metal bellows by welding, which can not only seal the air cavity, but also improve the service life of the energy storage component. In addition, when the valve body 7 is made of metal material, the bellows can also be connected to both ends of the valve body 7 by welding to improve the connection strength.

[0074] Optionally, the energy storage component includes two rubber bags, which are respectively arranged at the two ends of the hollow structure and together with the hollow structure form the third chamber 18. When the energy storage component is a rubber bag, its working principle is similar to that of the bellows with a sealing cover, and will not be described in detail here.

[0075] Alternatively, if Figure 1 and Figure 4 As shown, the third chamber 18 is provided with an air passage 35 communicating with the outside of the shell, and the third chamber 18 can be filled and discharged with gas through the air passage 35 .

[0076] Specifically, in this embodiment, the air passage 35 provided in the third chamber 18 is conducive to timely filling the third chamber 18 with high-pressure gas when compressed, so that the energy storage component can recover quickly and the volume of the third chamber 18 is restored in time, thereby avoiding system idleness of the entire hydraulic device.

[0077] Alternatively, if Figure 1 to Figure 2 As shown, the accumulator further includes a first joint 2 and a second joint 9 respectively provided at both ends of the housing, and the first oil port 33 and the second oil port 34 are respectively provided on the first joint 2 and the second joint 9. In addition, a buffer is respectively provided at one end of the first joint 2 and the second joint 9 located in the housing to provide buffering for the energy storage component.

[0078] Specifically, in this embodiment, the oil circuit of the hydraulic device can be connected to the first oil port 33 and the second oil port 34 through the first joint 2 and the second joint 9 extending outside the housing, thereby improving the assembly efficiency of the accumulator. The first joint 2 and the second joint 9 can be provided with a first sealing ring 1 and a second sealing ring 10 at the interface to seal the entire oil circuit.

[0079] Furthermore, the first joint 2 and the second joint 9 may be provided with a first buffer ring 3 and a second buffer ring 12 at one end located in the shell, respectively, to provide a buffer for the energy storage component during the process of compressing the third chamber 18, thereby preventing the energy storage component from being squeezed and damaged, and improving its service life. The first buffer ring 3 and the second buffer ring 12 may be assembled on the first joint 2 and the second joint 9 through the first clamp ring 16 and the second clamp ring 11, respectively, which is convenient for assembly and disassembly and has low cost.

[0080] Alternatively, if Figure 3 As shown, a plurality of balancing channels are provided, and when the pressure difference between the first chamber 17 and the second chamber 19 is greater than a set threshold, at least one of the balancing channels is opened.

[0081] Specifically, in this embodiment, a plurality of balancing channels are provided so that when the pressure difference between the first chamber 17 and the second chamber 19 exceeds a set threshold, the hydraulic oil can quickly flow from the high-pressure chamber into the low-pressure chamber, thereby improving the working efficiency of the accumulator.

[0082] The present application also provides an embodiment having three chambers (a first hydraulic chamber, a second hydraulic chamber and an air chamber), with reference to Figures 1 to 5 , comprising a housing, a valve seat assembly and an energy storage assembly; the housing is provided with a first hydraulic chamber, an air chamber and a second hydraulic chamber separated from each other in sequence, the first hydraulic chamber is provided with a first oil port 33, the second hydraulic chamber is provided with a second oil port 34, the first oil port 33 and the second oil port 34 can both be communicated with the oil circuit of the hydraulic device; the valve seat assembly is arranged in the housing, the valve seat assembly comprises a valve body 7 and a valve, the valve body 7 is a hollow structure, the valve is arranged on the valve body 7, and the valve is in a normally closed state; the energy storage assembly closes the hollow structure to form the air chamber and separates the first hydraulic chamber and the second hydraulic chamber; when there is a pressure difference between the first hydraulic chamber and the second hydraulic chamber and the valve is in a closed state, the energy storage assembly can balance the pressure difference between the first hydraulic chamber and the second hydraulic chamber by compressing the air chamber; when the pressure difference between the first hydraulic chamber and the second hydraulic chamber exceeds a set value, the valve is in an open state, and the first hydraulic chamber is communicated with the second hydraulic chamber.

[0083] Specifically, a first hydraulic chamber and a second hydraulic chamber are formed inside the housing, and the first hydraulic chamber and the second hydraulic chamber can be connected to the oil circuit of the hydraulic device through the first oil port 33 and the second oil port 34 respectively. When there is a pressure difference between the first hydraulic chamber and the second hydraulic chamber, the system back pressure of the hydraulic device will be affected. The utility model forms an air chamber between the two hydraulic chambers by arranging a valve seat assembly and an energy storage component, and when there is a pressure difference between the two hydraulic chambers, the air chamber is compressed by the energy storage component, so that the air pressure balance is achieved between the two hydraulic chambers.

[0084] For example, when the first oil port 33 and the second oil port 34 are both connected to the oil circuit of the hydraulic device, the valve is in a closed state, and the air cavity separates the two hydraulic cavities from each other. When the hydraulic oil enters the first hydraulic cavity through the first oil port 33, the oil in the first hydraulic cavity increases, so that the energy storage component can compress the air cavity, and then compress the second hydraulic cavity, so that the oil in the second hydraulic cavity flows out.

[0085] When the hydraulic oil enters the second hydraulic chamber through the second oil port 34, the oil in the second hydraulic chamber increases, allowing the energy storage component to compress the air chamber, and then compress the first hydraulic chamber, causing the oil in the first hydraulic chamber to flow out to balance the pressure difference between the first hydraulic chamber and the second hydraulic chamber.

[0086] Through the above process, it can be known that when the valve is normally closed, the pressure in the first hydraulic chamber and the second hydraulic chamber is low, and the energy storage component compresses the third chamber so that the pressure in the first hydraulic chamber and the second hydraulic chamber can be kept stable, so that the pressure difference is reduced. In addition, when the oil in the first hydraulic chamber and the second hydraulic chamber flows out freely, since the pressure difference in the first hydraulic chamber and the second hydraulic chamber is small, and the air chamber is subjected to less pressure from the energy storage component, the volume change of the air chamber is small and the pressure is stable, so that when it is applied to the hydraulic suspension system of the vehicle, the system back pressure at different suspension positions changes less, and the damping and stiffness decoupling at different heights is achieved.

[0087] According to the second aspect of the present invention, referring to Figures 1 to 5 , providing a suspension system, comprising the accumulator described in the first aspect.

[0088] Specifically, in practical applications, the suspension system usually also includes a throttle damping valve, a shock absorber and a power source, and the power source can be a motor pump. During the operation of the suspension system, if the motor pump is connected in series with the throttle damping valve and the shock absorber cylinder, the accumulator provided by the utility model can be connected to the upper and lower chambers of the shock absorber, that is, the first chamber 17 and the second chamber 19 are connected to the upper and lower chambers of the shock absorber through the first oil port 33 and the second oil port 34 respectively.

[0089] The accumulator provided by the utility model can well balance the pressure difference between the first chamber 17 and the second chamber 19, so that the two hydraulic chambers can replenish oil with each other, suppressing excessive high pressure or excessive low pressure in the hydraulic chamber, thereby enabling it to well control the back pressure fluctuation of the damping valve, facilitating better damping control, and making the pressure changes of the upper and lower chambers of the shock absorber at different heights small, thereby having little effect on the stiffness of the suspension system.

[0090] According to the third aspect of the present invention, referring to Figures 1 to 5 , providing a vehicle, comprising the suspension system described in the second aspect.

[0091] Specifically, when the energy accumulator provided by the utility model is connected to the suspension system, due to its high integration, no additional device needs to be connected, which facilitates its arrangement on the whole vehicle and reduces the production cost.

[0092] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0093] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. An accumulator, characterized in that: include: A housing, wherein a first chamber and a second chamber independent of each other are formed in the housing; a balancing channel, one end of which is connected to the first chamber, and the other end of which is connected to the second chamber; When the pressure difference between the first chamber and the second chamber is greater than a set threshold, the balancing channel is opened, and the first chamber is communicated with the second chamber.

2. The accumulator according to claim 1, characterized in that It also includes a valve seat assembly, which is arranged in the shell to separate the first chamber and the second chamber in the shell.

3. The accumulator according to claim 2, characterized in that The balancing passage is formed on the valve seat assembly.

4. The accumulator according to claim 3, characterized in that The valve seat assembly includes a valve, which is arranged in the balancing channel and is used to open or close the balancing channel.

5. The accumulator according to claim 4, characterized in that The valve is a one-way valve, and at least two balancing channels are provided, and the opening directions of the corresponding one-way valves in at least two balancing channels are opposite.

6. The accumulator according to claim 5, characterized in that The one-way valve comprises a one-way valve seat, a spring and a steel ball; The one-way valve seat is assembled in the balancing channel, and the two ends of the spring are respectively fixed on the one-way valve seat and the steel ball. The spring is provided with a pre-pressure so that the steel ball blocks the balancing channel. When the pressure difference is greater than the pre-pressure, the steel ball can move to a position to open the balance channel.

7. The accumulator according to claim 6, characterized in that The one-way valve seat is provided with a notch which can be communicated with the balancing channel, and the steel ball can block or leave the notch to close and open the balancing channel.

8. The accumulator according to claim 2, characterized in that The valve seat assembly includes a valve body, the valve body is a hollow structure, and the hollow structure forms a third chamber; When the balancing passage is closed, the third chamber can be used to balance the pressure difference between the first chamber and the second chamber.

9. The accumulator according to claim 8, characterized in that The valve seat assembly also includes an energy storage component, which can close the hollow structure to form the third chamber and separate the first chamber from the second chamber.

10. The accumulator according to claim 9, characterized in that The energy storage component includes two bellows, which are respectively arranged at two ends of the hollow structure and form the third chamber with the hollow structure.

11. The accumulator according to claim 10, characterized in that The energy storage assembly further includes two sealing covers, which are disposed at both ends of the two bellows to seal the third chamber.

12. The accumulator according to claim 9, characterized in that The energy storage component includes two rubber bags, which are respectively arranged at two ends of the hollow structure and form the third chamber with the hollow structure.

13. The accumulator according to claim 8, characterized in that The third chamber is provided with an air passage communicating with the outside of the shell, and the third chamber can be filled and discharged with gas through the air passage.

14. The accumulator according to claim 1, characterized in that The housing is provided with a first oil port communicating with the first chamber, and a second oil port communicating with the second chamber. Both the first oil port and the second oil port are used to connect with an external oil circuit.

15. The accumulator according to claim 14, characterized in that It also includes a first joint and a second joint respectively disposed at two ends of the housing, and the first oil port and the second oil port are respectively disposed on the first joint and the second joint.

16. The accumulator according to claim 15, characterized in that A buffer is provided at one end of the first joint and the second joint located in the shell to provide buffering for the energy storage component.

17. The accumulator according to claim 1, characterized in that There are multiple balancing channels, and when the pressure difference between the first chamber and the second chamber is greater than a set threshold, at least one of the balancing channels is opened.

18. A suspension system, characterized in that: An accumulator comprising any one of claims 1-17.

19. A vehicle, characterized in that: Comprising the suspension system of claim 18.

Images