Shock absorber, suspension system and vehicle

Abstract

The invention relates to a shock absorber, a suspension system and a vehicle, and the shock absorber comprises a working cylinder provided with a working cavity; the piston is arranged in the working cavity so as to divide the working cavity into a first working cavity and a second working cavity; one end of the piston rod is arranged in the first working cavity in a penetrating manner and is connected with the piston; the piston rod is provided with an internal channel, and one end of the internal channel is communicated with the second working cavity. The internal channel communicated with the second working cavity is formed in the piston rod, so that liquid in the second working cavity can be directly extracted or injected into the second working cavity through the internal channel, that is, the internal channel can be directly used as a liquid loop, the number of pipelines at the bottom of the shock absorber is reduced, and the shock absorber is more compact. And the shock absorber can be conveniently arranged on a vehicle.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to a shock absorber, suspension system, and vehicle. Background Technology

[0002] The vehicle suspension system is a key factor determining its ride comfort and handling stability. A good suspension system should effectively dampen vibrations from different road surfaces while also improving the vehicle's handling stability. Current technology typically uses shock absorbers to dampen vibrations. Shock absorbers adjust damping in real time via electronic control, significantly improving vehicle handling, comfort, and safety. They can also adapt to different road conditions and driving needs, protecting vehicle components.

[0003] Existing shock absorbers typically include multiple fluid circuits. The main circuit is responsible for basic damping, the control circuit regulates the fluid flow and pressure to change the damping, and the compensation circuit balances the fluid volume. The coordination of these multiple circuits enables the adjustment function.

[0004] Because existing shock absorbers have many circuits, they have a large number of pipes at the bottom, which makes it inconvenient to install and arrange the shock absorbers. Summary of the Invention

[0005] This application provides a shock absorber, suspension system, and vehicle that improves transmission efficiency during the transmission process, thereby at least partially solving the aforementioned technical problems.

[0006] To achieve the above objectives, according to a first aspect of this application, a shock absorber is provided, the shock absorber comprising:

[0007] The working cylinder is equipped with a working chamber;

[0008] A piston is disposed within the working chamber to divide the working chamber into a first working chamber and a second working chamber;

[0009] One end of the piston rod passes through the first working chamber and is connected to the piston;

[0010] The piston rod has an internal channel, one end of which is connected to the second working chamber.

[0011] Optionally, the internal channel extends along the axial direction of the piston rod.

[0012] Optionally, the shock absorber further includes a first drive pump, one end of which is connected to the first working chamber and the other end of which is connected to the other end of the internal channel.

[0013] Optionally, the first drive pump is connected to the first working chamber through a connecting channel, the connecting channel including a connecting hole, a liquid storage chamber and a first channel connected in sequence, the connecting hole being connected to the first working chamber and the first channel being connected to the first drive pump.

[0014] Optionally, the shock absorber includes a liquid storage cylinder, which is sleeved outside the working cylinder, and a liquid storage chamber is formed between the liquid storage cylinder and the working cylinder;

[0015] The connecting hole is located on the working cylinder.

[0016] Optionally, the shock absorber includes a base, the liquid storage cylinder is fixed on the base, and the first channel is opened on the base.

[0017] Optionally, the base is provided with a drive pump interface communicating with the first channel, and the first drive pump is fixed to the drive pump interface.

[0018] Optionally, the shock absorber further includes a base, a second drive pump, a reservoir, and a compression solenoid valve fixed on the base. The base has a second channel communicating with the second working chamber and a third channel communicating with the second drive pump.

[0019] The one-way valve of the connecting compression solenoid valve is located between the second channel and the third channel. The second drive pump is connected to the liquid reservoir. The compression one-way valve allows liquid from the third channel to pass through and then enter the second channel.

[0020] Optionally, the shock absorber further includes an energy accumulator, which is connected to the third channel.

[0021] Optionally, the base is provided with an energy storage interface that communicates with the third channel, and the energy storage is fixed to the energy storage interface.

[0022] Optionally, the shock absorber further includes a switching valve disposed between the second drive pump and the third channel, the switching valve being adapted to control the disconnection or connection between the second drive pump and the third channel.

[0023] Optionally, the third channel is connected to the reservoir, and the switching valve is also used to control whether the third channel is disconnected from or connected to the reservoir.

[0024] Optionally, the switching valve is a three-position two-way valve.

[0025] Optionally, the shock absorber further includes a first check valve disposed between the reservoir and the switching valve, the first check valve being adapted to allow liquid to enter the reservoir after passing through.

[0026] Optionally, the compression solenoid valve further includes a compression relief valve, which is disposed between the second channel and the third channel, and allows liquid from the second channel to enter the third channel after passing through it.

[0027] Optionally, the shock absorber further includes a recovery solenoid valve, a first channel is provided on the base, and the shock absorber is provided with a connecting hole and a liquid storage chamber. The connecting hole connects the liquid storage chamber and the first working chamber, and the first channel is connected to the liquid storage chamber.

[0028] The reset check valve of the reset solenoid valve allows liquid from the third channel to enter the first channel; the reset overflow valve of the reset solenoid valve allows liquid from the first channel to enter the third channel.

[0029] Optionally, the shock absorber further includes a recovery solenoid valve, with a recovery valve seat disposed on the base, and the recovery solenoid valve fixed to the recovery valve seat; and / or

[0030] A compression valve seat is provided on the base, and the compression solenoid valve is fixed on the compression valve seat.

[0031] Optionally, the recovery valve seat and the compression valve seat are respectively disposed at opposite ends of the base and located on the same axis, which is inclined relative to the piston rod.

[0032] Optionally, the angle between the axis and the piston rod is 60 degrees to 85 degrees.

[0033] Optionally, the base is provided with a lifting ring, which is adapted to fix the base.

[0034] According to a second aspect of this application, a suspension system is provided, the suspension system including the aforementioned shock absorber.

[0035] According to a third aspect of this application, a vehicle is provided, the vehicle including the aforementioned shock absorber, or the aforementioned suspension system.

[0036] This embodiment of the application provides an internal channel on the piston rod that communicates with the second working chamber, allowing liquid to be directly drawn from or injected into the second working chamber through the internal channel. In other words, the internal channel can be used directly as a liquid circuit, thereby reducing the number of pipes at the bottom of the shock absorber and facilitating the installation of the shock absorber on the vehicle. This solves the technical problem in the prior art where the large number of pipes at the bottom of the shock absorber due to the numerous shock absorber circuits makes the installation and arrangement of the shock absorber inconvenient.

[0037] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0040] Figure 1 This is a schematic diagram of the system principle of a shock absorber provided in an exemplary embodiment of this application;

[0041] Figure 2 yes Figure 1 A cross-sectional schematic diagram of a portion of the structure of the shock absorber in the image;

[0042] Figure 3 yes Figure 2 A schematic diagram of the base of the shock absorber in the middle;

[0043] Figure 4 yes Figure 3 A cross-sectional view of the base.

[0044] Explanation of reference numerals in the attached figures:

[0045] 100. Shock absorbers;

[0046] 10. Working cylinder; 11. Working chamber; 111. First working chamber; 112. Second working chamber;

[0047] 20. Piston; 21. Internal passage;

[0048] 30. Piston rod;

[0049] 40. Liquid storage tank;

[0050] 50. Connecting channel; 51. Connecting hole; 52. Liquid storage chamber;

[0051] 60. Base; 61. First channel; 62. Second channel; 63. Third channel; 64. Drive pump interface; 65. Accumulator interface; 66. Reset valve seat; 67. Compression valve seat; 68. Lifting ring; 71. Compression solenoid valve; 711. Compression check valve; 712. Compression relief valve; 72. Reset solenoid valve; 721. Reset check valve; 722. Reset relief valve;

[0052] 73. First drive pump; 74. Second drive pump; 75. Liquid reservoir; 76. Accumulator; 77. Switch valve; 78. First check valve; O1. Shaft. Detailed Implementation

[0053] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0054] This application provides a shock absorber 100, such as Figure 1 and Figure 2 As shown, Figure 1 This is a schematic diagram of the system principle of a shock absorber 100 provided in an exemplary embodiment of this application; Figure 2 yes Figure 1 A cross-sectional schematic diagram of the shock absorber 100 in the diagram.

[0055] The shock absorber 100 includes a working cylinder 10, a piston 20, and a piston rod 30. The working cylinder 10 has a cylindrical working chamber 11 inside, which is convenient for holding liquid.

[0056] The piston 20 is disposed within the working chamber 11, dividing the working chamber 11 into a first working chamber 111 and a second working chamber 112, both of which are used to hold liquid. The piston 20 can move within the working chamber 11, thereby changing the volume of the first working chamber 111 and the second working chamber 112.

[0057] One end of the piston rod 30 passes through the first working chamber 111 and is connected to the piston 20, while the other end is located outside the working cylinder 10. The piston rod 30 can drive the piston 20 to move within the working chamber 11 to adjust the distance between the wheel and the vehicle body, thereby changing the volume of the first working chamber 111 and the second working chamber 112.

[0058] The piston rod 30 has an internal channel 21, one end of which is connected to the second working chamber 112. Through the internal channel 21, liquid can be directly drawn from or injected into the second working chamber 112 to provide the liquid pressure for the piston rod 30 to move within the working chamber 112.

[0059] Specifically, in this embodiment, the piston 20 is a solid piston 20, that is, it has a hole or valve that connects the first working chamber 111 and the second working chamber 112.

[0060] This application provides an internal channel 21 on the piston rod 30 that communicates with the second working chamber 112, allowing liquid to be directly drawn from or injected into the second working chamber 112 through the internal channel 21. This means the internal channel 21 can be used directly as a liquid circuit, reducing the number of pipes at the bottom of the shock absorber 100 and facilitating its placement on the vehicle. This solves the technical problem in the prior art where the numerous circuits in the shock absorber 100 lead to a large number of pipes at its bottom, making installation and placement of the shock absorber 100 inconvenient.

[0061] Specifically, in order to facilitate the opening of the internal channel 21, the internal channel 21 is configured to extend along the axial direction of the piston rod 30, that is, the internal channel 21 is opened along the axial direction of the piston rod 30, and the two end outlets of the internal channel 21 are located on the axial end faces of the piston rod 30.

[0062] In some embodiments, to enable rapid fluid flow, the shock absorber 100 further includes a first drive pump 73. One end of the first drive pump 73 is connected to the first working chamber 111, and the other end is connected to the other end of the internal channel 21. When the first drive pump 73 rotates forward, the fluid flows out of the first working chamber 111, passes through the first drive pump 73, and then enters the second working chamber 112 through the internal channel 21 to push the piston 20 upward, thereby rapidly lifting the piston rod 30. When the first drive pump 73 rotates in reverse, the fluid enters the internal channel 21 from the second working chamber 112, and then enters the first working chamber 111 through the first drive pump 73 to push the piston 20 downward, thereby rapidly lowering the piston rod 30, thus achieving rapid lifting and rapid lowering of the piston rod 30.

[0063] By setting a first drive pump 73 to provide the main power for fluid flow, rapid height adjustment of the piston rod 30 can be achieved under fully active operating conditions, resulting in fast system response while ensuring vehicle comfort and handling stability. The first drive pump 73 can be an electric motor pump.

[0064] Specifically, one end of the first drive pump 73 can be directly connected to the first working chamber 111, or it can be connected to the first working chamber 111 through the connecting channel 50. In this embodiment, the first drive pump 73 is connected to the first working chamber 111 through the connecting channel 50. The connecting channel 50 includes a connecting hole 51, a liquid storage chamber 52, and a first channel 61 connected in sequence. The connecting hole 51 is connected to the first working chamber 111, and the first channel 61 is connected to the first drive pump 73.

[0065] When the first drive pump 73 rotates forward, the liquid flows out from the first working chamber 111, passes through the connecting hole 51, the liquid storage chamber 52, and the first channel 61 in sequence, and then enters the first drive pump 73; when the first drive pump 73 rotates in reverse, the liquid flows out from the first drive pump 73, passes through the first channel 61, the liquid storage chamber 52, and the connecting hole 51 in sequence, and then enters the first working chamber 111.

[0066] Specifically, in this embodiment, the liquid storage chamber 52 is located outside the working chamber 11. The shock absorber 100 includes a liquid storage cylinder 40, which is sleeved outside the working cylinder 10, forming a liquid storage chamber 52 between the liquid storage cylinder 40 and the working cylinder 10. That is to say, in this embodiment, the shape of the liquid storage chamber 52 is annular. Of course, the shape of the liquid storage chamber 52 is not limited to annular and can be set according to needs.

[0067] When the liquid storage chamber 52 is located outside the working chamber 11, the connecting hole 51 is opened on the working cylinder 10. The connecting hole 51 directly connects the liquid storage chamber 52 and the first working chamber 111. The number of connecting holes 51 can be set as needed. They can be opened along the circumference of the working cylinder 10 or along the axial direction of the working cylinder 10.

[0068] Specifically, in this embodiment, such as Figure 3 and Figure 4 As shown, the shock absorber 100 also includes a base 60, a liquid storage cylinder 40 fixed on the base 60, and a first channel 61 formed on the base 60. That is, in this embodiment, the first working chamber 111 is connected to the first channel 61 on the base 60 through the liquid storage chamber 52, and then connected to the first drive pump 73. In this way, the first drive pump 73 can be fixed to one end of the base 60, improving the integration of the shock absorber 100.

[0069] Furthermore, in this embodiment, to facilitate the arrangement of the first drive pump 73, a drive pump interface 64 communicating with the first channel 61 is provided on the base 60, and the first drive pump 73 is fixed on the drive pump interface 64. The first drive pump 73 is connected to the first channel 61 through the drive pump interface 64, so as to make reasonable use of space and facilitate the fixing of the first drive pump 73.

[0070] When the piston rod 30 needs to be lifted quickly, the first drive pump 73 is controlled to rotate forward. Liquid flows out from the first working chamber 111 of the working cylinder 10, passes sequentially through the connecting hole 51 on the working cylinder 10, the liquid storage chamber 52 between the working cylinder 10 and the liquid storage cylinder 40, and the first channel 61 on the base 60, and then enters the first drive pump 73. It then enters the internal channel 21 from the other end of the first drive pump 73, and finally enters the second working chamber 112 to push the piston 20 to move upward, thereby driving the piston rod 30 to be lifted quickly.

[0071] When the piston rod 30 needs to descend rapidly, the first drive pump 73 is reversed, and liquid enters the internal channel 21 from the second working chamber 112, and then enters the first channel 61 on the base 60, the liquid storage chamber 52 between the working cylinder 10 and the liquid storage cylinder 40, and the connecting hole 51 on the working cylinder 10 through the first drive pump 73, and enters the first working chamber 111 to push the piston 20 to move downward, thereby causing the piston rod 30 to descend rapidly.

[0072] In some embodiments, the shock absorber 100 further includes a second drive pump 74, a reservoir 75, and a compression solenoid valve 71 fixed on the base 60. The base 60 has a second channel 62 communicating with the second working chamber 112 and a third channel 63 communicating with the second drive pump 74.

[0073] The compression check valve 711 of the compression solenoid valve 71 is located between the second channel 62 and the third channel 63. The second drive pump 74 is connected to the liquid reservoir 75. The compression check valve 711 allows the liquid in the third channel 63 to pass through and enter the second channel 62.

[0074] When the second drive pump 74 is activated, the liquid in the reservoir 75, under the action of the second drive pump 74, passes through the third channel 63, then through the one-way valve of the compression solenoid valve 71, then through the second channel 62, and finally enters the second working chamber 112 to add liquid into the second working chamber 112, pushing the piston 20 to move upward, thereby pushing the piston rod 30 to slowly lift.

[0075] By configuring a second drive pump 74, a liquid reservoir 75, a compression solenoid valve 71, a second channel 62, and a third channel 63, liquid in the liquid reservoir 75 can enter the second working chamber 112 to achieve slow lifting of the piston rod 30 in height. Specifically, the liquid reservoir 75 can be an oil reservoir. The second drive pump 74 can be an electric motor pump.

[0076] Furthermore, in order to ensure that the piston rod 30 can be held when it is raised to a preset position, the shock absorber 100 also includes an accumulator 76, which is connected to the third channel 63.

[0077] After the liquid enters the reservoir 75, the liquid pressure increases. Part of the liquid will enter the second working chamber 112, while part of it will enter the accumulator 76 to store the liquid pressure. When the piston rod 30 is lifted to the preset position, the second drive pump 74 is turned off. The piston rod 30 can be maintained in the preset position without the need for the second drive pump 74 to continue operating. This not only protects the piston rod 30 in the preset position but also extends the service life of the second drive pump 74.

[0078] Furthermore, to improve the integration of the shock absorber 100, the base 60 is provided with an accumulator interface 65 communicating with the third channel 63. The accumulator 76 is fixed to the accumulator interface 65, and the liquid in the accumulator 76 can directly enter the third channel 63, or the liquid in the third channel 63 can directly enter the accumulator 76. The accumulator 76 is directly fixed to the base 60 to improve the integration of the shock absorber 100.

[0079] Furthermore, to facilitate the control of the connection and disconnection between the second drive pump 74 and the third channel 63, the shock absorber 100 also includes a switching valve 77 disposed between the second drive pump 74 and the third channel 63. The switching valve 77 is adapted to control the disconnection or connection between the second drive pump 74 and the third channel 63. When the piston rod 30 is raised to a preset position, the switching valve 77 is disconnected, causing the second drive pump 74 to disconnect from the third channel 63, and liquid is no longer injected into the second working chamber 112 or the accumulator 76 through the third channel 63.

[0080] Furthermore, to allow the liquid in the circuit to also enter the reservoir 75, specifically, the third channel 63 is connected to the reservoir 75, and the switching valve 77 is also used to control whether the third channel 63 is connected to or disconnected from the reservoir 75. When the piston rod 30 needs to descend, the switching valve 77 controls the connection between the third channel 63 and the reservoir 75, allowing the liquid in the first working chamber 111 and the accumulator 76 to enter the reservoir 75 from the third channel 63. At this time, the liquid pressure in the circuit decreases, and the piston rod 30 descends, thus achieving a slow descent of the piston rod 30.

[0081] Specifically, for ease of control, the switching valve 77 is a three-position two-way valve. When in position one, it is disconnected. When in position two, the second drive pump 74 and the third channel 63 are connected, the second drive pump 74 is activated, and the liquid in the reservoir 75 can enter the third channel 63. When in position three, the third channel 63 and the reservoir 75 are connected, and the liquid in the third channel 63 can enter the reservoir 75.

[0082] By controlling the connection between the third channel 63 and the reservoir 75, the liquid in the third channel 63 can enter the reservoir 75, thereby achieving the slow descent of the piston rod 30. When the descent is complete, the third channel 63 is disconnected from the reservoir 75, and the piston rod 30 stops descending.

[0083] In some embodiments, to prevent reverse flow of liquid in the third channel 63 as it flows towards the reservoir 75, the shock absorber 100 further includes a first check valve 78 disposed between the reservoir 75 and the switching valve 77. The first check valve 78 is adapted to allow liquid to enter the reservoir 75 after passing through it. That is, by providing the first check valve 78, only liquid in the third channel 63 is allowed to flow into the reservoir 75.

[0084] In some embodiments, the compression solenoid valve 71 further includes a compression relief valve 712, which is disposed between the second channel 62 and the third channel 63. The compression relief valve 712 allows liquid in the second channel 62 to pass through and enter the third channel 63. By providing the compression relief valve 712, liquid in the second working chamber 112 can pass through the second channel 62, the compression relief valve 712, and into the third channel 63, entering the reservoir 75 or the accumulator 76, or it can pass through the reset check valve 721 of the reset solenoid valve 72, the first channel 61, the reservoir 52, and the connecting hole 51, entering the first working chamber 111.

[0085] Furthermore, the shock absorber 100 also includes a recovery solenoid valve 72, a first channel 61 is provided on the base 60, and the shock absorber 100 is provided with a connecting hole 51 and a liquid storage chamber 52. The connecting hole 51 connects the liquid storage chamber 52 and the first working chamber 111, and the first channel 61 connects to the liquid storage chamber 52.

[0086] The reset check valve 721 of the reset solenoid valve 72 allows liquid from the third channel 63 to enter the first channel 61; the reset relief valve 722 of the reset solenoid valve 72 allows liquid from the first channel 61 to enter the third channel 63.

[0087] When the piston rod 30 is lifted, the liquid in the first working chamber 111 passes through the connecting hole 51, the liquid storage chamber 52, and the first channel 61, and then through the reset overflow valve 722 of the reset solenoid valve 72, enters the third channel 63, and can then enter the accumulator 76 or the liquid storage tank 75. Alternatively, it can enter the second working chamber 112 through the compression check valve 711 of the compression solenoid valve 71 and the second channel 62, thus lifting the piston rod 30.

[0088] When the piston rod 30 descends, the liquid in the second working chamber 112 can enter the third channel 63 through the second channel 62 and the compression relief valve 712 of the compression solenoid valve 71. It can then enter the accumulator 76 or the reservoir 75. Alternatively, it can enter the first working chamber 111 through the reset check valve 721 of the reset solenoid valve 72, the first channel 61, the reservoir 52, and the connecting hole 51.

[0089] Furthermore, to improve the integration of the shock absorber 100, a recovery valve seat 66 is provided on the base 60, and a recovery solenoid valve 72 is fixed to the recovery valve seat 66. A compression valve seat 67 is provided on the base 60, and a compression solenoid valve 71 is fixed to the compression valve seat 67. By directly fixing the compression solenoid valve 71 and / or the recovery solenoid valve 72 to the base 60, the integration of the shock absorber 100 is improved, and the overall vehicle layout space is reduced.

[0090] By setting a recovery valve seat 66, a compression valve seat 67, an accumulator interface 65, and a drive pump interface 64 on the base 60, and opening a first channel 61, a second channel 62, and a third channel 63, the integration of the shock absorber 100 is improved, and the overall vehicle layout space is reduced.

[0091] Specifically, the recovery valve seat 66 and the compression valve seat 67 are respectively located at opposite ends of the base 60 and on the same axis O1, which is inclined relative to the piston rod 30. That is to say, assuming the piston rod 30 is vertically set, the compression solenoid valve 71 and the recovery solenoid valve 72 are not horizontally set, but inclined. By tilting the compression solenoid valve 71 and the recovery solenoid valve 72, the space occupied by the shock absorber 100 in the horizontal direction is reduced, thereby facilitating the installation of the shock absorber 100 on the vehicle.

[0092] Specifically, the angle between axis O1 and piston rod 30 is 60-85 degrees. By setting the angle between axis O1 of the recovery valve seat 66 and compression valve seat 67 and piston rod 30 to 60-85 degrees, the space occupied by shock absorber 100 in the horizontal direction is minimized, facilitating installation on the vehicle.

[0093] In some embodiments, to facilitate the fixing of the shock absorber 100, the base 60 is provided with a lifting ring 68, which is adapted to fix the base 60. By providing the lifting ring 68, it is easy to fix the shock absorber 100 to the vehicle frame.

[0094] This application also provides a suspension system including the aforementioned shock absorber 100. This suspension system possesses all the beneficial effects of the aforementioned shock absorber 100, which will not be elaborated further here.

[0095] This application also provides a vehicle that includes the shock absorber 100 or suspension system as described above, which has all the beneficial effects of the aforementioned shock absorber 100 or suspension system, which will not be repeated here.

[0096] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0097] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0098] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0099] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A shock absorber (100), characterized in that, The shock absorber (100) includes: The working cylinder (10) is provided with a working chamber (11); A piston (20) is disposed in the working chamber (11) to divide the working chamber (11) into a first working chamber (111) and a second working chamber (112); The piston rod (30) has one end inserted into the first working chamber (111) and connected to the piston (20); The piston rod (30) has an internal channel (21) and one end of the internal channel (21) is connected to the second working chamber (112).

2. The shock absorber (100) according to claim 1, characterized in that, The internal channel (21) extends along the axial direction of the piston rod (30).

3. The shock absorber (100) according to claim 1, characterized in that, The shock absorber (100) also includes a first drive pump (73), one end of which is connected to the first working chamber (111) and the other end is connected to the other end of the internal channel (21).

4. The shock absorber (100) according to claim 3, characterized in that, The first drive pump (73) is connected to the first working chamber (111) through a connecting channel (50). The connecting channel (50) includes a connecting hole (51), a liquid storage chamber (52), and a first channel (61) connected in sequence. The connecting hole (51) is connected to the first working chamber (111), and the first channel (61) is connected to the first drive pump (73).

5. The shock absorber (100) according to claim 4, characterized in that, The shock absorber (100) includes a liquid storage cylinder (40), which is sleeved outside the working cylinder (10), and a liquid storage chamber (52) is formed between the liquid storage cylinder (40) and the working cylinder (10); The connecting hole (51) is provided on the working cylinder (10).

6. The shock absorber (100) according to claim 5, characterized in that, The shock absorber (100) includes a base (60), the liquid storage cylinder (40) is fixed on the base (60), and the first channel (61) is opened on the base (60).

7. The shock absorber (100) according to claim 6, characterized in that, The base (60) is provided with a drive pump interface (64) that communicates with the first channel (61), and the first drive pump (73) is fixed on the drive pump interface (64).

8. The shock absorber (100) according to any one of claims 1-7, characterized in that, The shock absorber (100) also includes a base (60), a second drive pump (74), a reservoir (75), and a compression solenoid valve (71) fixed on the base (60). The base (60) has a second channel (62) communicating with the second working chamber (112) and a third channel (63) communicating with the second drive pump (74). The compression check valve (711) of the compression solenoid valve (71) is located between the second channel (62) and the third channel (63). The second drive pump (74) is connected to the reservoir (75). The compression check valve (711) allows the liquid in the third channel (63) to pass through and enter the second channel (62).

9. The shock absorber (100) according to claim 8, characterized in that, The shock absorber (100) also includes an energy storage device (76) which is connected to the third channel (63).

10. The shock absorber (100) according to claim 9, characterized in that, The base (60) is provided with an energy storage interface (65) that communicates with the third channel (63), and the energy storage device (76) is fixed on the energy storage interface (65).

11. The shock absorber (100) according to claim 10, characterized in that, The shock absorber (100) further includes a switching valve (77) disposed between the second drive pump (74) and the third channel (63), the switching valve (77) being adapted to control the disconnection or connection between the second drive pump (74) and the third channel (63).

12. The shock absorber (100) according to claim 11, characterized in that, The third channel (63) is connected to the reservoir (75), and the switching valve (77) is also used to control the third channel (63) to disconnect or connect to the reservoir (75).

13. The shock absorber (100) according to claim 12, characterized in that, The switching valve (77) is a three-position two-way valve.

14. The shock absorber (100) according to claim 12, characterized in that, The shock absorber (100) further includes a first check valve (78) disposed between the reservoir (75) and the switching valve (77), the first check valve (78) being adapted to allow liquid to enter the reservoir (75) after passing through.

15. The shock absorber (100) according to claim 12, characterized in that, The compression solenoid valve (71) also includes a compression relief valve (712), which is disposed between the second channel (62) and the third channel (63). The compression relief valve (712) allows liquid from the second channel (62) to pass through and enter the third channel (63).

16. The shock absorber (100) according to claim 12, characterized in that, The shock absorber (100) also includes a recovery solenoid valve (72), the base (60) is provided with a first channel (61), the shock absorber (100) is provided with a connecting hole (51) and a liquid storage chamber (52), the connecting hole (51) connects the liquid storage chamber (52) and the first working chamber (111), and the first channel (61) connects to the liquid storage chamber (52); The recovery check valve (721) of the recovery solenoid valve (72) allows liquid from the third channel (63) to enter the first channel (61); the recovery overflow valve (722) of the recovery solenoid valve (72) allows liquid from the first channel (61) to enter the third channel (63).

17. The shock absorber (100) according to claim 8, characterized in that, The shock absorber (100) further includes a recovery solenoid valve (72), a recovery valve seat (66) is provided on the base (60), and the recovery solenoid valve (72) is fixed on the recovery valve seat (66); and / or A compression valve seat (67) is provided on the base (60), and the compression solenoid valve (71) is fixed on the compression valve seat (67).

18. The shock absorber (100) according to claim 17, characterized in that, The recovery valve seat (66) and the compression valve seat (67) are respectively disposed at opposite ends of the base (60) and are located on the same axis, with the axis (O1) being inclined relative to the piston rod (30).

19. The shock absorber (100) according to claim 17, characterized in that, The angle between the axis (O1) and the piston rod (30) is 60-85 degrees.

20. The shock absorber (100) according to claim 8, characterized in that, The base (60) is provided with a lifting ring (68), which is adapted to fix the base (60).

21. A suspension system, characterized in that, The suspension system includes a shock absorber (100) as described in any one of claims 1-20.

22. A vehicle, characterized in that, The vehicle includes a shock absorber (100) as described in any one of claims 1-20, or a suspension system as described in claim 21.

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