Rotary hydraulic shock absorber, swing arm, suspension structure and vehicle

Abstract

The application discloses a rotary hydraulic shock absorber, which comprises a hollow cylinder-shaped cylinder body and a rotating shaft coaxially arranged in the cylinder body, the cylinder body extends a first partition piece radially inward, the rotating shaft extends a second partition piece radially outward, the first partition piece is sealed and slidably connected with the rotating shaft, the second partition piece is sealed and slidably connected with the cylinder body, the inner cavity of the cylinder body is divided into a first cavity and a second cavity filled with working liquid, and at least one of the first partition piece and the second partition piece is provided with a valve hole through which the working liquid can pass. The application also discloses a swing arm, a suspension structure and a vehicle comprising the rotary hydraulic shock absorber. The rotary hydraulic shock absorber can realize the damping effect, control the movement of the shock absorber in the space inside the cylinder body, avoid increasing the structural length, greatly reduce the demand for arrangement space, reduce the difficulty of the interior space design of the vehicle, and increase the application range of the shock absorber.

Description

Technical Field

[0001] This invention relates to the field of vehicle suspension system technology, and particularly to a rotary hydraulic shock absorber, a control arm, a suspension structure, and a vehicle. Background Technology

[0002] Shock absorbers, as an important component widely used in automobiles, function to suppress the oscillations caused by the rebound of the springs after absorbing shocks and the impacts from the road surface. They also accelerate the attenuation of vibrations in the chassis and body, thereby improving the ride comfort of the vehicle. When driving over uneven roads, although the shock-absorbing springs can filter out road vibrations, the springs themselves still undergo reciprocating motion. Shock absorbers are used to suppress this spring bounce.

[0003] Traditional hydraulic shock absorbers are mainly classified into single-tube and twin-tube types. However, the current mainstream telescopic shock absorbers operate by having a piston rod drive a piston in a reciprocating motion within a working cylinder. Their structural length is limited by the piston's stroke, requiring significant space and thus restricting their application scenarios. Furthermore, accommodating these long telescopic shock absorbers necessitates extensive structural design adjustments within the vehicle, increasing design complexity and manufacturing costs. Summary of the Invention

[0004] The purpose of this invention is to provide a rotary hydraulic shock absorber, as well as a swing arm, suspension structure, and vehicle including the shock absorber, which at least partially overcomes the shortcomings of the prior art.

[0005] According to one aspect of the present invention, a rotary hydraulic shock absorber is provided, comprising: a cylinder body enclosing a cylindrical inner cavity, wherein a first partition and a rotating shaft extend radially inward from the cylinder body; a second partition extends radially outward from the rotating shaft, wherein the rotating shaft is coaxially disposed within the cylinder body; the first partition is sealed and slidably connected to the rotating shaft; and the second partition is sealed and slidably connected to the cylinder body, thereby dividing the inner cavity into a first cavity and a second cavity; and both the first cavity and the second cavity are filled with a working fluid, wherein at least one of the first partition and the second partition is provided with a valve orifice through which the working fluid can pass.

[0006] In some embodiments, the rotary hydraulic shock absorber further includes a spring plate, one end of which is fixed to at least one of the first separator and the second separator, and the other end is a free end that covers the valve hole.

[0007] In some embodiments, the valve orifice includes a first valve orifice and a second valve orifice disposed on the second separator, and the spring sheet includes a first spring sheet and a second spring sheet fixed on two opposite sides of the second separator and respectively covering the first valve orifice and the second valve orifice.

[0008] In some embodiments, the rotary hydraulic shock absorber further includes a damping valve installed in the valve port.

[0009] Advantageously, the cylinder body includes a hollow cylindrical cylinder barrel, on which an inflation valve is provided, the inflation valve being connected to the second cavity, the second cavity being partially filled with gas.

[0010] Advantageously, the angle between the first separator and the inflation valve in the circumferential direction of the rotating shaft is between 30° and 90°.

[0011] Advantageously, the angle between the second separator and the inflation valve in the circumferential direction of the rotating shaft is greater than or equal to 90°.

[0012] In some embodiments, the cylinder body includes a hollow cylindrical cylinder barrel, and the first partition is separate from the cylinder barrel and is fixed to the cylinder barrel.

[0013] Advantageously, the rotary hydraulic shock absorber further includes a threaded fastener that passes radially outward through the cylinder and is screwed into a threaded hole formed on the first separator, thereby securing the first separator to the inside of the cylinder.

[0014] In some embodiments, the second separator is separate from the shaft and is fixed to the shaft by welding or threaded connection.

[0015] Advantageously, the surface of the first separator that contacts the rotating shaft is provided with a sealing strip or a plurality of grooves extending axially.

[0016] Advantageously, the second separator has a sealing strip or a plurality of grooves extending axially on the surface that contacts the cylinder.

[0017] In some embodiments, the cylinder body includes a hollow cylindrical cylinder and a first end cap and a second end cap mounted at both ends of the cylinder along its axial direction. The first end cap and the second end cap have through holes in their centers for the two ends of the rotating shaft to pass through. The first end cap and the second end cap form a sealing fit with the cylinder and the rotating shaft. Furthermore, a first bearing and a second bearing are provided between the cylinder and the rotating shaft, and the first bearing and the second bearing are respectively located on the outer side of the first end cap and the second end cap along their axial direction.

[0018] According to another aspect of the invention, a control arm for a vehicle suspension is also provided, comprising a rotary hydraulic shock absorber as described above and a control arm body, one end of the control arm body being connected to a wheel assembly and the other end being fixedly connected to the cylinder or shaft of the rotary hydraulic shock absorber for connection to the vehicle frame via the rotary hydraulic shock absorber.

[0019] Advantageously, the swing arm body is integrally formed with or welded to the cylinder of the rotary hydraulic shock absorber.

[0020] According to another aspect of the invention, a suspension structure for a vehicle is also provided, comprising the rotary hydraulic shock absorber or the swing arm as described above.

[0021] According to another aspect of the invention, a vehicle is also provided, which includes the rotary hydraulic shock absorber, the swing arm, or the suspension structure as described above.

[0022] According to embodiments of the present invention, by optimizing the reciprocating piston operation of a traditional telescopic hydraulic shock absorber to a rotary operation, the shock absorber's movement is controlled within the cylinder while achieving a damping effect. This avoids the increased structural length due to the working stroke, as is common with telescopic hydraulic shock absorbers, significantly reducing the space requirements for layout, simplifying vehicle interior space design, and expanding the application range of the shock absorber. Furthermore, in the swing arm according to embodiments of the present invention, the rotary structure of the hydraulic shock absorber allows for a more compact and convenient integration of the hydraulic shock absorber and the swing arm body, further saving vehicle interior space. Attached Figure Description

[0023] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0024] Figure 1 A perspective view of an example of a rotary hydraulic shock absorber according to an embodiment of the present invention;

[0025] Figure 2 for Figure 1 An exploded view of the rotary hydraulic shock absorber shown.

[0026] Figure 3 for Figure 1 A radial cross-sectional view of the rotary hydraulic shock absorber shown.

[0027] Figure 4 for Figure 3 A partially enlarged view of the radial cross-section of the rotary hydraulic shock absorber shown;

[0028] Figure 5 for Figure 1A perspective view of the rotating shaft of the rotary hydraulic shock absorber shown.

[0029] Figure 6 A radial cross-sectional view of another example of a rotary hydraulic shock absorber according to an embodiment of the present invention;

[0030] Figure 7 A schematic diagram of Example 1 of a rotary hydraulic shock absorber including an embodiment of the present invention; and

[0031] Figure 8 This is a schematic diagram of Example 2 of a swing arm that includes a rotary hydraulic shock absorber according to an embodiment of the present invention. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. For ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] First, refer to Figures 1 to 5 An example of a rotary hydraulic damper according to an embodiment of the present invention is described, namely, a rotary hydraulic damper 100.

[0035] Figure 1 and Figure 2 The images show a perspective view and an exploded view of the rotary hydraulic shock absorber 100, respectively. Figure 1 and Figure 2 As shown, the rotary hydraulic shock absorber 100 includes a cylinder 110 and a rotating shaft 120. The cylinder 110 encloses a cylindrical inner cavity, and the rotating shaft 120 is coaxially disposed inside the cylinder 110. In this way, the rotating shaft 120 can rotate around its central axis within the cylinder 110.

[0036] Figure 3 A radial section of the rotary hydraulic shock absorber 100 is schematically shown. (Combined) Figure 2 and Figure 3 As can be seen, a first partition 111 extends radially inward from the cylinder block 110; a second partition 121 extends radially outward from the shaft 120. Figure 3As shown more clearly in the diagram, the first partition 111 is sealed and slidably connected to the rotating shaft 120; the second partition 121 is sealed and slidably connected to the cylinder body 110. Thus, the cylinder body 110, the first partition 111, the rotating shaft 120, and the second partition 121 divide the inner cavity of the cylinder body 110 into a first cavity A and a second cavity B. According to an embodiment of the invention, both the first cavity A and the second cavity B are filled with a working fluid. Advantageously, the working fluid filled in the first cavity A and the second cavity B can be hydraulic oil.

[0037] In the rotary hydraulic shock absorber according to an embodiment of the present invention, at least one of the first partition and the second partition is provided with a valve hole through which working fluid can pass. The valve hole connects the first cavity A and the second cavity B, allowing the working fluid to transfer between the two.

[0038] In reference Figures 1 to 5 In the described rotary hydraulic shock absorber 100, a valve port 123 is provided only on the second separator 121. In this case, the second separator 121 is configured to allow the working fluid to flow through the valve port 123 from both sides in different directions. Furthermore, the damping effect on the flow of the working fluid can be further enhanced by providing other damping devices corresponding to the valve port 123, thereby improving the shock absorption effect. This will be referred to below. Figure 5 A more detailed explanation is provided.

[0039] Alternatively, a valve orifice (not shown) for the working fluid to flow through can be provided only on the first separator 111. Similarly, in this case, the first separator 111 is configured to allow the working fluid to flow through the valve orifice from both sides in different directions, and preferably, other damping devices can be provided corresponding to the valve orifice to further provide a damping effect on the flow of the working fluid.

[0040] Alternatively, both the first partition 111 and the second partition 121 may be provided with valve holes for the working fluid to flow through. In some cases, both the first partition 111 and the second partition 121 may be configured to allow the working fluid to flow through the valve hole from both sides in different directions. As an alternative or supplement, at least one of the first partition 111 and the second partition 121 may be configured to allow the working fluid to flow through the valve hole in only one direction, as long as the overall arrangement allows the working fluid to flow bidirectionally between the first cavity A and the second cavity B. For example, the valve hole on the first partition 111 may only allow the working fluid to flow from the first cavity A to the second cavity B, and the valve hole on the second partition 121 may only allow the working fluid to flow from the second cavity B to the first cavity A; or, the valve hole on the first partition 111 may only allow the working fluid to flow from the second cavity B to the first cavity A, and the valve hole on the second partition 121 may only allow the working fluid to flow from the first cavity A to the second cavity B.

[0041] The rotary hydraulic shock absorber 100 according to an embodiment of the present invention operates in accordance with... Figure 3 As shown, when the shaft 120 rotates clockwise relative to the cylinder 100, the volume of the first chamber A increases, and the volume of the second chamber B decreases. The working fluid in the second chamber B overcomes resistance and enters the first chamber A through the valve orifice 123. When the shaft 120 rotates counterclockwise relative to the cylinder 100, the volume of the second chamber B increases, and the volume of the first chamber A decreases. The working fluid in the first chamber A overcomes resistance and enters the second chamber B through the valve orifice 123. In this process, the faster the shaft 120 rotates relative to the cylinder 110, the greater the resistance it experiences.

[0042] The rotary hydraulic shock absorber according to embodiments of the present invention, through its unique rotary operation, achieves shock absorption while confining the shock absorber's working range to the inside of the cylinder. This avoids the increased space requirements associated with common telescopic hydraulic shock absorbers due to their reciprocating motion, thus reducing the complexity of vehicle interior design. Furthermore, the smaller shock absorber size and lower space requirements allow the rotary hydraulic shock absorber to function in many scenarios where telescopic hydraulic shock absorbers are unsuitable, expanding its application range.

[0043] Advantageously, such as Figure 3 As shown, the cylinder body 110 includes a hollow cylindrical cylinder 112. A filling valve 114 is provided on the cylinder 112, and the filling valve 114 is connected to a second chamber B, which is partially filled with gas. The filling valve 114 can be used to fill the cylinder body 110 with gas, and can also be used to regulate the internal gas pressure.

[0044] Because the first chamber A and the second chamber B are interconnected, the first chamber A is filled with, for example, a working fluid (e.g., hydraulic oil), while the second chamber B is filled with both working fluid and gas. Therefore, when the hydraulic oil undergoes volume changes due to thermal expansion and contraction within the relatively fixed-volume chambers, the volume changes of the gas can offset these hydraulic oil volume changes. This avoids the strong pressure exerted on the first and second chambers A and B by the thermal expansion and contraction of the hydraulic oil when both chambers are completely filled, ensuring the safe operation of the cylinder 110 and reducing the required design strength and manufacturing cost of the cylinder 110.

[0045] Advantageously, the gas filled in the second chamber B can be low-pressure nitrogen. When the second chamber B is filled with working fluid and low-pressure nitrogen, due to the chemical inertness of nitrogen itself, it has virtually no negative impact on the cylinder block 110 and the internal working fluid due to oxidation and corrosion. Furthermore, because it is a low-pressure gas, it can effectively prevent the formation of bubbles when the working fluid is agitated or flowing, and even if bubbles are formed, they are more easily eliminated within the liquid under low-pressure conditions.

[0046] Advantageously, the angle between the first separator 111 and the inflation valve 114 in the circumferential direction of the pivot 120 is between 30° and 90°. This is merely an example. Figure 3 As shown, the first separator 111 has a generally fan-shaped cross-section and is fixed relative to the inflation valve. The two radial sidewalls 111a and 111b of the first separator 111 form angles of 30° and 90° with the inflation valve 114, respectively.

[0047] Considering that the specific gravity of gas is lower than that of liquid, the rotary hydraulic shock absorber 100 according to the embodiment of the present invention is preferably positioned with the inflation valve 114 in an upward direction along the direction of gravity during operation. The gas inside the second cavity B is located at the top of the second cavity B and is connected to the inflation valve 114. The minimum circumferential angle between the first partition 111 and the inflation valve 114 is greater than or equal to 30°, ensuring that a certain distance is maintained between the first partition 111 and the inflation valve 114. This prevents excessive compression of the space containing gas in the upper part of the second cavity B, and prevents gas from entering the first cavity A when the second partition 121 is too small to accommodate the inflation valve 114 when the second partition 121 rotates with the shaft 120. Furthermore, because the second partition 121 will conflict with the inflation valve 114 when rotating with the shaft 120, and the first partition 111 will also hinder the rotation of the second partition 121, the farther the first partition 111 is from the inflation valve 114, the smaller the maximum rotation range of the shaft 120. Therefore, the maximum angle between the first separator 111 and the inflation valve 114 in the circumferential direction is less than or equal to 90°, which can provide sufficient movement range for the second separator 121, ensuring the working effect of the rotary hydraulic shock absorber 100 and the reserved safety margin.

[0048] Advantageously, when the second partition 121 rotates, the angle between it and the inflation valve 114 in the circumferential direction of the rotating shaft 120 is greater than or equal to 90°. Since the rotary hydraulic shock absorber 100 is preferably positioned with the inflation valve 114 in the upward direction of gravity when it is in operation, if the second partition 121 is too close to the inflation valve 114 (vertical direction), the working fluid or gas in the second chamber B may leak during bumps and swaying, affecting the working effect of the rotary hydraulic shock absorber.

[0049] Figure 4 for Figure 3 A partially enlarged radial cross-sectional view of the rotary hydraulic shock absorber shown. Advantageously, as... Figure 4As shown, multiple axially extending grooves are provided on the surface 124 where the first separator 111 contacts the rotating shaft 120. These surface grooves can increase the contact area to improve sealing performance and help improve lubrication performance. Specifically, multiple axially extending grooves are provided on the contacting surfaces, and each groove can be considered as a tiny hydrodynamic bearing, generating additional hydrodynamic pressure during relative motion, causing a thin fluid lubrication film to form between the friction surfaces, changing the two surfaces from a contact state to a non-contact state, effectively reducing mechanical seal friction and wear. Moreover, in some cases, this groove structure can also be used to store wear debris and lubricating oil.

[0050] Similarly, to improve sealing performance, a sealing strip 122 can be provided on the surface of the second separator 121 that contacts the cylinder barrel 112, such as... Figure 3 As shown. Optionally, the surface of the second partition 121 that contacts the cylinder 112 may be provided with an axially extending groove 121a, and the strip-shaped sealing strip 122 may be embedded in the groove 121a and thus fixed on the second partition 121.

[0051] It should be understood that the groove and sealing strip structures described above in conjunction with the first separator 111 and the second separator 121, as well as their placement positions, are exemplary. For example, as an alternative or supplement, a sealing strip can be provided on the surface of the first separator 111 that contacts the rotating shaft 110, while a groove for sealing and lubrication can be provided on the surface of the second separator 121 that contacts the rotating shaft 110. Furthermore, it should be understood that the rotary hydraulic shock absorber according to embodiments of the present invention can also incorporate any other structures that are beneficial to improving sealing and lubrication performance.

[0052] Since the sealing effect between the cavities directly affects the damping effect of the shock absorber, the grooves and / or sealing strips provided on the surfaces where the first separator 111 connects to the rotating shaft 120 and the second separator 121 connects to the cylinder 112 help improve the damping effect of the shock absorber.

[0053] Figure 5 A perspective view of the rotating shaft 120 of the rotary hydraulic shock absorber 100.

[0054] exist Figure 5In the example shown, the second partition 121 can be integrally formed with the rotating shaft 120, or it can be a separate part that is fixed to the rotating shaft 120 by means such as welding. As an example only, if the second partition 121 and the rotating shaft 120 are integrally formed, they can be formed directly by casting, or manufactured by milling after casting; if the second partition 121 and the rotating shaft 120 are separate, the second partition 121 can be fixed to the rotating shaft 120 by means such as threaded connection. Compared to an integrally formed structure, manufacturing the second partition 121 and the rotating shaft 120 separately reduces processing difficulty and manufacturing costs.

[0055] like Figure 5 As shown more clearly in the diagram, two parallel valve holes 123a and 123b for the working fluid to pass through are arranged on the second partition 121. Two spring plates 125a and 125b are also provided on the second partition 121, which are respectively fixed to the first and second sides of the second partition 121 by screws 126a and 126b, such that the free end of the spring plate 125a covers the first valve hole 123a from the first side, and the free end of the second spring plate 125b covers the second valve hole 123b from the second side. Thus, when the working fluid flows from the first side to the second side, the first spring plate 125a seals the valve hole 123a, while the second spring plate 125b elastically deforms under the pressure of the working fluid and opens the valve hole 123b, thereby providing a damping effect; and vice versa.

[0056] Although not shown in the figure, as an alternative or supplement, a damping valve can be installed in the valve orifice to allow the working fluid to flow through the orifice in one or both directions and provide flow resistance, thereby providing damping and achieving vibration reduction. For example, the valve orifice allows the working fluid to flow through it, enabling the transfer of the working fluid between the first chamber A and the second chamber B. With the damping valve filling the valve orifice, the damping valve allows the working fluid to pass through from both sides in different directions, and when the working fluid passes through from both sides, the damping valve can provide a certain degree of obstruction and slowing down the flow, thus achieving a bidirectional damping effect. Of course, in other cases, a one-way damping valve can also be installed in different valve orifices. In summary, the combination of the damping valve and the valve orifice itself limiting the flow rate of the working fluid can achieve better vibration reduction.

[0057] Return to reference Figure 2 and Figure 3 In the rotary hydraulic shock absorber 100, the first separator 111 can be a separate part from the cylinder 112 and is fixed to the cylinder 112. Specifically, as Figure 2 and Figure 3As shown, the threaded fastener 113 passes radially through the cylinder 112 from the outside of the cylinder 112 and is screwed into the threaded hole provided on the first partition 111 located on the inner side of the cylinder 112, thereby tightly fixing the first partition 111 to the inner surface of the cylinder 112. This structure facilitates the machining and manufacturing of the cylinder 112 and helps to reduce machining difficulty and manufacturing costs.

[0058] It should be understood that the structure in which the first separator 111 is separated from the cylinder 112 is merely exemplary. Figure 6 This is a radial cross-sectional view of another example of a rotary hydraulic shock absorber according to an embodiment of the present invention. Figure 6 In the example shown, the first separator 111 and the cylinder 112 are an integral part, which can be processed by casting followed by machining or by milling.

[0059] Next, return to the reference. Figure 2 An exemplary structure of the cylinder block 110 is described. For example... Figure 2 As shown in the exploded view of the parts, the cylinder body 110, in addition to the cylinder barrel 112, may also include a first end cap 115a and a second end cap 115b installed at both axial ends of the cylinder barrel 112. Both the first end cap 115a and the second end cap 115b have through holes in their centers for the two ends of the rotating shaft 120 to pass through. The cylinder barrel 112, the first end cap 115a, and the second end cap 115b form a closed inner cavity. In other cases, the cylinder body 110 may have an end cap at only one end, while having an end wall integral with the cylinder barrel 112 at the other end.

[0060] Advantageously, sealing rings are provided between the first end cover 115a, the second end cover 115b, the cylinder 112, and the rotating shaft 120. For example... Figure 2 As shown, there is a first large sealing ring 116a between the first end cover 115a and the cylinder 112, and a first small sealing ring 117a between the first end cover 115a and the rotating shaft 120; there is a second large sealing ring 116b between the second end cover 115b and the cylinder 112, and a second small sealing ring 117b between the second end cover 115b and the rotating shaft 120.

[0061] Advantageously, such as Figure 2 As shown, a first bearing 118a and a second bearing 118b are provided between the cylinder 112 and the rotating shaft 120. The first bearing 118a and the second bearing 118b are located inside the cylinder 112 and on the axial outer side of the first end cover 115a and the second end cover 115b, respectively.

[0062] In addition, such as Figure 2As shown, a shim can be provided between the end cover and the bearing on the same side. The first shim 119a is located between the first end cover 115a and the first bearing 118a, and the second shim 119b is located between the second end cover 115b and the second bearing 118b. Adding the shim prevents the inner ring of the bearing from directly contacting the end cover, reducing friction between them.

[0063] According to an embodiment of the present invention, a control arm for a vehicle suspension is also provided, the control arm including the rotary hydraulic shock absorber described in the embodiments of the present invention above. Figure 7 and Figure 8 Different examples of swing arms according to embodiments of the present invention are shown.

[0064] like Figure 7 The swing arm 200 shown includes a rotary hydraulic shock absorber 100 and a swing arm body 210 according to an embodiment of the present invention. One end 211 of the swing arm body 210 is connected to a wheel assembly, and the other end 212 is fixedly connected to both ends of the rotating shaft 120 of the rotary hydraulic shock absorber 100. Specifically, the other end 212 of the swing arm body 210 forms a first connecting portion 212a and a second connecting portion 212b, which are respectively fixedly connected to the two ends of the rotating shaft 120 extending out of the cylinder body 110, for example by threaded fastening. The cylinder body 110 of the rotary hydraulic shock absorber 100 can be used to connect to, for example, a vehicle frame.

[0065] Similarly, Figure 8 The swing arm 200' shown includes a rotary hydraulic shock absorber 100 and a swing arm body 210' according to an embodiment of the present invention. One end 211' of the swing arm body 210' is connected to the wheel assembly, and the other end 212' is fixedly connected to the cylinder 110 of the rotary hydraulic shock absorber 100. For example, as Figure 8 As shown, the swing arm body 210' can be integrally formed with or welded to the cylinder 110 of the rotary hydraulic shock absorber 100. The rotating shaft 120 of the rotary hydraulic shock absorber 100 extends from both ends of the cylinder 110 and can be used to connect to, for example, a vehicle frame.

[0066] According to an embodiment of the present invention, a suspension structure for a vehicle is also provided. It includes the aforementioned rotary hydraulic shock absorbers or the aforementioned control arms.

[0067] According to an embodiment of the present invention, a vehicle is also provided, which includes the aforementioned rotary hydraulic shock absorbers, or the aforementioned swing arms, or the aforementioned suspension structures.

[0068] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A rotary hydraulic shock absorber, comprising: The cylinder body encloses a cylindrical inner cavity, and a first partition extends radially inward from the cylinder body; and A rotating shaft, wherein a second partition extends radially outward from the rotating shaft. The rotating shaft is coaxially disposed within the cylinder body, the first partition is sealed to the rotating shaft and slidably connected, and the second partition is sealed to the cylinder body and slidably connected, thereby dividing the inner cavity into a first cavity and a second cavity. Both the first cavity and the second cavity are filled with working fluid, and at least one of the first partition and the second partition is provided with a valve hole through which the working fluid can pass. The cylinder body includes a hollow cylindrical cylinder barrel, on which an inflation valve is provided. The inflation valve is connected to the second cavity, which is partially filled with low-pressure gas. When the rotary hydraulic shock absorber is working, it is in the position where the inflation valve is in the upward direction of gravity. The minimum included angle between the first partition and the inflating valve in the circumferential direction of the rotating shaft is greater than or equal to 30 o , and the maximum included angle is less than or equal to 90 o ; and The second partition works with the inflation valve in the circumferential direction of the rotating shaft at an angle greater than or equal to 90 degrees when rotating o .

2. The rotary hydraulic shock absorber as claimed in claim 1 further includes a spring plate, one end of which is fixed to at least one of the first separator and the second separator, and the other end is a free end covering the valve hole.

3. The rotary hydraulic shock absorber of claim 2 wherein, The valve orifice includes a first valve orifice and a second valve orifice disposed on the second partition, and the spring sheet includes a first spring sheet and a second spring sheet fixed on two opposite sides of the second partition and respectively covering the first valve orifice and the second valve orifice.

4. The rotary hydraulic shock absorber as described in claim 1 further includes a damping valve installed in the valve port.

5. The rotary hydraulic shock absorber of claim 1 wherein, The cylinder body includes a hollow cylindrical cylinder barrel, and the first partition is separate from the cylinder barrel and is fixed to the cylinder barrel.

6. The rotary hydraulic shock absorber of claim 5 further includes a threaded fastener that passes radially outward through the cylinder and is screwed into a threaded hole formed on the first separator, thereby fixing the first separator to the inside of the cylinder.

7. The rotary hydraulic shock absorber of claim 1 wherein, The second separator is separate from the shaft and is fixed to the shaft by welding or threaded connection.

8. The rotary hydraulic shock absorber of any one of claims 5-7, wherein, The first separator has a sealing strip or a plurality of grooves extending axially on its surface that contacts the rotating shaft.

9. The rotary hydraulic shock absorber of any one of claims 5-7, wherein, The second separator has a sealing strip or a plurality of grooves extending axially on the surface that contacts the cylinder.

10. The rotary hydraulic shock absorber as described in claim 1, wherein, The cylinder body includes a hollow cylindrical cylinder and a first end cap and a second end cap installed at both ends of the cylinder along its axial direction. The first end cap and the second end cap have through holes in the center for the two ends of the rotating shaft to pass through. The first end cap and the second end cap form a sealing fit with the cylinder and the rotating shaft. Furthermore, a first bearing and a second bearing are provided between the cylinder and the rotating shaft. The first bearing and the second bearing are respectively located on the outer side of the first end cap and the second end cap along their axial direction.

11. A control arm for a vehicle suspension, comprising: Rotary hydraulic shock absorber as described in any one of claims 1-10; and The swing arm body has one end for connection to the wheel assembly and the other end for fixed connection to the cylinder or shaft of the rotary hydraulic shock absorber, for connection to the vehicle frame via the rotary hydraulic shock absorber.

12. The swing arm as claimed in claim 11, wherein, The main body of the swing arm is integrally formed with or welded to the cylinder of the rotary hydraulic shock absorber.

13. A suspension structure for a vehicle, comprising a rotary hydraulic shock absorber as described in any one of claims 1-10 or a swing arm as described in claim 11 or 12.

14. A vehicle comprising a rotary hydraulic shock absorber as claimed in any one of claims 1-10, a swing arm as claimed in claim 11 or 12, or a suspension structure as claimed in claim 13.

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