Shock absorber, suspension assembly, and vehicle

Abstract

The application discloses a damper, a suspension assembly and a vehicle, the damper comprising a cam, a transmission shaft and a follower, the cam being rotatable about an axis of the cam, the follower comprising a connecting arm, one end of the connecting arm being matched with the cam, the other end of the connecting arm being connected with the transmission shaft, the connecting arm and the transmission shaft being an integral piece, or the connecting arm and the transmission shaft being connected through an anti-rotation structure, the anti-rotation structure being used for limiting the rotation of the connecting arm relative to the transmission shaft. According to the damper, the connecting arm and the transmission shaft are connected through the anti-rotation structure, the relative rotation of the connecting arm and the transmission shaft can be limited, the connecting arm can only produce the movement along the axial direction of the cam, the relative rotation of the connecting arm and the transmission shaft is avoided, the disengagement of the connecting arm from the transmission shaft is avoided, the disengagement of the follower from the transmission shaft is avoided, and the damper is prevented from being disabled.

Description

Technical Field

[0001] This invention relates to the field of shock absorber technology, and in particular to a shock absorber, suspension assembly, and vehicle. Background Technology

[0002] In the prior art, the vibration damper achieves the vibration reduction effect through active movement. The follower of the cam connecting the vibration damper slides and rolls along the track groove. When the drive shaft moves axially, the drive shaft and the follower rotate relative to each other, which can easily cause the follower to disengage from the drive shaft, thus leading to the failure of the entire vibration damper. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a vibration damper that can prevent the follower from disengaging from the drive shaft, thereby preventing vibration damper failure.

[0004] The present invention also proposes a suspension assembly for a vehicle including the aforementioned shock absorber.

[0005] The present invention also proposes a vehicle comprising the above-described suspension assembly.

[0006] According to an embodiment of the present invention, a vibration damper includes a cam, a drive shaft, and a follower. The cam is rotatable about its axis. The follower includes a connecting arm, one end of which engages with the cam and the other end of which is connected to the drive shaft. The connecting arm and the drive shaft are integral parts, or the connecting arm and the drive shaft are connected by an anti-rotation structure, which restricts the rotation of the connecting arm relative to the drive shaft.

[0007] According to an embodiment of the present invention, the vibration damper restricts the rotation of the cam around its axis, causing the follower that cooperates with the cam to rotate and move along the axial direction of the cam. The transmission shaft is connected to a relatively fixed component, restricting the rotation of the transmission shaft so that the transmission shaft can only move along the axial direction of the cam. Furthermore, the connecting arm is connected to the transmission shaft through an anti-rotation structure, which restricts the relative rotation between the connecting arm and the transmission shaft, thereby preventing the connecting arm from rotating relative to the transmission shaft, preventing the follower from disengaging from the transmission shaft, and preventing the vibration damper from failing.

[0008] In addition, the vibration damper according to the present invention may also have the following additional technical features:

[0009] In some embodiments of the present invention, the anti-rotation structure includes a fixing part and a fixing hole. The fixing part is disposed on the connecting arm, and the fixing hole is disposed on the drive shaft. The cross-section of the fixing hole is non-circular, and the cross-section of the fixing part is non-circular and mates with the fixing hole. At least a portion of the fixing part is located inside the fixing hole.

[0010] In some embodiments of the present invention, the inner peripheral wall of the cam is provided with a helical groove, the helical groove extends helically along the axial direction of the cam, one end of the transmission shaft in the axial direction extends into the cam, and one end of the follower is located in the helical groove.

[0011] In some embodiments of the present invention, the follower further includes a first bearing disposed within the helical groove and sleeved on the connecting arm.

[0012] In some embodiments of the present invention, the connecting arm is provided with a stud portion, the stud portion is located on the side of the fixing portion opposite to the first bearing, and the vibration damper further includes a limiting nut, the limiting nut being screwed to the stud portion.

[0013] In some embodiments of the present invention, a protrusion is provided on the outer peripheral wall of the connecting arm, and the protrusion is located on the side of the first bearing opposite to the fixed part.

[0014] In some embodiments of the present invention, the connecting arm is interference-fitted with the inner peripheral wall of the first bearing; the fixing part is interference-fitted with the fixing hole on the transmission shaft.

[0015] In some embodiments of the present invention, the first bearing is a needle roller bearing.

[0016] In some embodiments of the present invention, there are multiple spiral grooves, and the first bearing and the connecting arm are multiple spiral grooves corresponding one-to-one.

[0017] In some embodiments of the present invention, the shock absorber further includes a lower fork arm, which is fixedly connected to the drive shaft.

[0018] In some embodiments of the present invention, the lower fork arm and the drive shaft are connected by a spline.

[0019] In some embodiments of the present invention, the vibration damper further includes a mounting tower, which is fixedly connected to the drive shaft.

[0020] In some embodiments of the present invention, the mounting tower and the drive shaft are connected by a spline.

[0021] In some embodiments of the present invention, the spline is a rectangular spline.

[0022] In some embodiments of the present invention, the damper further includes a drive member for driving the cam to rotate.

[0023] In some embodiments of the present invention, the driving element is a drive motor, which is arranged around the cam.

[0024] In some embodiments of the invention, the shock absorber further includes a housing assembly defining an installation space, within which the drive and the cam are disposed.

[0025] In some embodiments of the present invention, one end of the housing assembly in the axial direction is provided with a clearance hole, a section of the drive shaft in the axial direction is disposed in the mounting space, and the other end of the guide rod in the axial direction passes through the clearance hole and extends out of the housing assembly.

[0026] In some embodiments of the present invention, one end of the drive shaft is provided with a guide groove, the guide groove extends along the axial direction of the drive shaft, and the damper further includes a guide rod, one end of the guide rod in the axial direction is fixedly connected to one end of the housing assembly in the axial direction opposite to the drive shaft, and the other end extends into the guide groove.

[0027] In some embodiments of the present invention, both ends of the housing assembly in the axial direction near the mounting space are provided with protrusions, and the cam is sleeved on the protrusions.

[0028] In some embodiments of the present invention, a second bearing is provided between the protrusion and the cam.

[0029] In some embodiments of the present invention, the second bearing is a deep groove ball bearing.

[0030] In some embodiments of the present invention, the housing assembly includes a first housing, a first end cap, and a second housing, wherein the first housing is disposed around the drive member; the first end cap blocks one end of the first housing in the axial direction; the second housing is connected to the first housing and disposed at the other end of the first housing in the axial direction, and the outer diameter of the second housing is smaller than the outer diameter of the first housing.

[0031] The present invention also provides a suspension assembly having the shock absorber described in the above embodiments.

[0032] According to an embodiment of the present invention, the suspension assembly restricts the rotation of the cam about its axis, causing the follower that cooperates with the cam to rotate and move along the axial direction of the cam. The drive shaft is connected to a relatively fixed component, restricting the rotation of the drive shaft so that the drive shaft can only move along the axial direction of the cam. Furthermore, the connecting arm is connected to the drive shaft through an anti-rotation structure, which restricts the relative rotation between the connecting arm and the drive shaft, thereby preventing the connecting arm from rotating relative to the drive shaft, thus preventing the follower from disengaging from the drive shaft, and preventing the shock absorber from failing.

[0033] The present invention also provides a vehicle having a suspension assembly according to the above embodiments.

[0034] According to an embodiment of the present invention, in a vehicle, by limiting the cam to rotate about the cam's axis, a follower that cooperates with the cam rotates and produces movement along the axial direction of the cam. The drive shaft is connected to a relatively fixed component, restricting the rotation of the drive shaft so that the drive shaft can only produce movement along the axial direction of the cam. Furthermore, the connecting arm is connected to the drive shaft through an anti-rotation structure, which can restrict the relative rotation between the connecting arm and the drive shaft, thereby preventing the connecting arm and the drive shaft from rotating relative to each other, thus preventing the connecting arm from disengaging from the drive shaft, preventing the follower from disengaging from the drive shaft, and preventing the shock absorber from failing.

[0035] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0036] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0037] Figure 1 This is a cross-sectional view of a vibration damper according to an embodiment of the present invention;

[0038] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0039] Figure 3 This is a front view of a vibration damper according to an embodiment of the present invention;

[0040] Figure 4 This is a front view of the drive shaft and follower of the vibration damper according to an embodiment of the present invention;

[0041] Figure 5 This is a cross-sectional view of the drive shaft and follower of the vibration damper according to an embodiment of the present invention;

[0042] Figure 6 yes Figure 5 Enlarged view of point B in the middle;

[0043] Figure 7 This is a front view of the connecting arm of the follower of the vibration damper according to an embodiment of the present invention;

[0044] Figure 8 This is a perspective view of the connecting arm of the follower of the vibration damper according to an embodiment of the present invention;

[0045] Figure 9 This is a front view of the first bearing of the follower of the vibration damper according to an embodiment of the present invention;

[0046] Figure 10 This is a perspective view of the first bearing of the follower of the vibration damper according to an embodiment of the present invention;

[0047] Figure 11 This is a front view of the drive shaft and lower fork arm of a shock absorber according to an embodiment of the present invention;

[0048] Figure 12 This is a front view of the lower fork arm of the shock absorber according to an embodiment of the present invention;

[0049] Figure 13 This is a cross-sectional view of the lower fork arm of a shock absorber according to an embodiment of the present invention;

[0050] Figure 14 This is a perspective view of the lower fork arm of a shock absorber according to an embodiment of the present invention.

[0051] Figure label:

[0052] 100. Vibration damper;

[0053] 1. Cam; 11. Helical groove;

[0054] 2. Follower; 22. First bearing; 221. Outer wall; 222. Inner wall; 23. Connecting arm; 231. Stud; 232. Protrusion; 233. Cylindrical part; 234. Fixing part;

[0055] 3. Drive component; 4. Lower fork arm; 5. Spline; 51. External spline; 52. Internal spline;

[0056] 6. Housing assembly; 61. First housing; 62. Second housing; 63. First end cap; 631. Clearance groove; 64. Second end cap; 641. Clearance hole; 65. Protrusion;

[0057] 7. Guide rod; 8. Second bearing; 9. Drive shaft; 91. Guide groove; 92. Fixing hole; 10. Anti-rotation structure. Detailed Implementation

[0058] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0059] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0060] Furthermore, 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0061] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0062] The vibration damper 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0063] like Figure 1 As shown, the damper 100 according to an embodiment of the present invention includes a cam 1, a drive shaft 9, and a follower 2.

[0064] Specifically, such as Figure 1 , Figure 2 and Figure 4As shown, cam 1 is rotatable about its axis. Follower 2 includes a connecting arm 23, one end of which engages with cam 1, and the other end is connected to drive shaft 9. It can be understood that when cam 1 rotates about its axis, it drives follower 2 to rotate along the axial direction of cam 1 (e.g., ...). Figure 1 The movement and partial rotation of the drive shaft 9 are achieved by moving the shaft in the first direction shown.

[0065] The connecting arm 23 and the drive shaft 9 are integrated into one piece, which can reduce the assembly steps of the shock absorber 100 and thus save the assembly time of the shock absorber 100. In addition, the connecting arm 23 and the drive shaft 9 will not rotate relative to each other.

[0066] Alternatively, the connecting arm 23 can be connected to the drive shaft 9 via an anti-rotation structure 10. This can be understood as a separate component. The follower 2, which cooperates with the cam 1, rotates and moves along the axial direction of the cam 1. The drive shaft 9 only moves along the axial direction of the cam 1. Since the axial dimension of the drive shaft 9 is relatively long, the connecting arm 23 can absorb the torsional force on the first bearing 22 to a certain extent, preventing the drive shaft 9 from breaking due to torsional force and increasing the reliability of the drive shaft 9. Simultaneously, it avoids the problems of material waste during processing that would occur if the connecting arm 23 and the drive shaft 9 were integrated.

[0067] like Figure 6 As shown, an anti-rotation structure 10 is provided between the connecting arm 23 and the drive shaft 9. The anti-rotation structure 10 is used to restrict the connecting arm 23 from rotating relative to the drive shaft 9.

[0068] Based on the specific structure of the shock absorber 100, the drive shaft 9 is generally connected to a relatively fixed component, which restricts the rotation of the drive shaft 9, so that the drive shaft 9 can only move in the axial direction of the cam 1. Furthermore, by setting an anti-rotation structure 10 between the connecting arm 23 and the drive shaft 9, the relative rotation between the connecting arm 23 and the drive shaft 9 can be restricted, thereby allowing the connecting arm 23 to move only in the axial direction of the cam 1. This prevents the connecting arm 23 from disengaging from the drive shaft 9, prevents the follower 2 from disengaging from the drive shaft 9, and prevents the shock absorber 100 from failing.

[0069] The follower 2 converts the rotation of the cam 1 into the movement of the transmission shaft 9 along the axial direction of the cam 1, which can actively reduce vibration and achieve the vibration reduction effect of the damper 100.

[0070] According to an embodiment of the present invention, the vibration damper 100 restricts the cam 1 to rotate around the axis of the cam 1, causing the follower 2 that cooperates with the cam 1 to rotate and generate movement in the axial direction of the cam 1. The transmission shaft 9 is connected to a relatively fixed component, which restricts the rotation of the transmission shaft 9, so that the transmission shaft 9 can only generate movement in the axial direction of the cam 1. Furthermore, the connecting arm 23 is connected to the transmission shaft 9 through the anti-rotation structure 10, which can restrict the relative rotation between the connecting arm 23 and the transmission shaft 9, thereby preventing the connecting arm 23 from disengaging from the transmission shaft 9, preventing the follower 2 from disengaging from the transmission shaft 9, and preventing the vibration damper 100 from failing.

[0071] In this embodiment, the vibration damper 100 is relatively simple to process, has a low manufacturing cost, is easy to disassemble and assemble, and can improve the service life of the vibration damper 100.

[0072] In some embodiments of the present invention, the anti-rotation structure 10 includes a fixing part 234 and a fixing hole 92. The fixing part 234 is disposed on the connecting arm 23, and the fixing hole 92 is disposed on the drive shaft 9. The cross-section of the fixing hole 92 is non-circular, and the cross-section of the fixing part 234 is non-circular and mates with the fixing hole 92. At least a portion of the fixing part 234 is located within the fixing hole 92. In conjunction with the specific structure of the damper 100, the drive shaft 9 is generally connected to a relatively fixed component, restricting the rotation of the drive shaft 9. This allows the drive shaft 9 to move only along the axial direction of the cam 1, thereby allowing the fixing part 234 to move only along the axial direction of the cam 1. This prevents relative rotation between the fixing part 234 and the drive shaft 9, thus preventing the fixing part 234 from disengaging from the drive shaft 9, preventing the follower 2 from disengaging from the drive shaft 9, and preventing the damper 100 from failing.

[0073] The cross-section of the fixing hole 92 is non-circular, and the cross-section of the fixing part 234 is also non-circular and matches the fixing hole 92. This causes the outer peripheral wall of the fixing part 234 to abut against the inner peripheral wall of the fixing hole 92. When the fixing part 234 and the fixing hole 92 generate relative rotational force, the resistance is large, which can prevent the relative rotation of the drive shaft 9 and the fixing part 234, thereby preventing the fixing part 234 from disengaging from the drive shaft 9, preventing the follower 2 from disengaging from the drive shaft 9, and preventing the damper 100 from failing.

[0074] In some embodiments of the present invention, a helical groove 11 is provided on the inner peripheral wall of the cam 1. The helical groove 11 extends helically along the axial direction of the cam 1. One end of the transmission shaft 9 extends into the cam 1 in the axial direction, and one end of the follower 2 is located in the helical groove 11. It can be understood that when the cam 1 rotates around the axis of the cam 1, the helical groove 11 rotates, and one end of the follower 2 spirals up or down along the extension direction of the helical groove 11, and slides and rotates. The follower 2 transmits the rotation of the cam 1 to the transmission shaft 9. The follower 2 converts the rotation of the cam 1 into the axial movement of the transmission shaft 9, which can actively reduce vibration and achieve the vibration reduction effect of the vibration damper 100.

[0075] Meanwhile, by placing the spiral groove 11 on the inner peripheral wall of the cam 1, the internal space of the cam 1 can be fully utilized, the overall volume of the damper 100 can be reduced, and the versatility of the damper 100 can be increased.

[0076] In this embodiment, as Figure 1 As shown, cam 1 is a cylindrical cam, which is a hollow cylinder with a cylindrical outer wall and a spiral groove 11 on the inner wall. At least part of the transmission shaft 9 extends into the inner wall of cam 1.

[0077] In some embodiments of the present invention, the follower 2 further includes a first bearing 22, which is disposed within the helical groove 11 and sleeved on the connecting arm 23. It is understood that when the cam 1 rotates around its axis, the helical groove 11 rotates, and the first bearing 22 spirals up or down along the extension direction of the helical groove 11, sliding and rotating. The connecting arm 23 transmits the motion of the first bearing 22 to the transmission shaft 9. The first bearing 22 converts the rotation of the cam 1 into axial movement of the transmission shaft 9, which can actively reduce vibration and achieve the vibration reduction effect of the damper 100.

[0078] Meanwhile, the first bearing 22 bears the rotational load of the cam 1, and the structure of the damper 100 is relatively simple and reliable.

[0079] Furthermore, such as Figure 2 and Figure 4 As shown, the connecting arm 23 passes through the drive shaft 9, which facilitates the connection between the drive shaft 9 and the first bearing 22 located on the outer side of the drive shaft 9.

[0080] In some embodiments of the present invention, such as Figure 2 , Figure 7 and Figure 8As shown, the connecting arm 23 is provided with a stud portion 231, which is located on the side of the fixing portion 234 away from the first bearing 22. The damper 100 also includes a limiting nut, which is screwed to the stud portion 231. After the limiting nut and the stud portion 231 are screwed together, the limiting nut can limit the transmission shaft 9, preventing the transmission shaft 9 from disengaging from the fixing portion 234 when it moves in the direction away from the first bearing 22, thereby increasing the reliability of the cooperation between the transmission shaft 9, the connecting arm 23 and the first bearing 22.

[0081] In some embodiments of the present invention, such as Figure 2 , Figure 7 and Figure 8 As shown, a protrusion 232 is provided on the outer peripheral wall of the connecting arm 23. The protrusion 232 is located on the side of the first bearing 22 away from the fixed part 234. The protrusion 232 can limit the first bearing 22 and prevent the first bearing 22 from disengaging from the connecting arm 23 when it moves in the direction away from the transmission shaft 9, thereby increasing the reliability of the cooperation between the transmission shaft 9, the connecting arm 23 and the first bearing 22.

[0082] By making the connecting arm 23 and the drive shaft 9 separate machined parts, during the assembly process of the shock absorber 100, after the connecting arm 23 and the first bearing 22 are assembled, the follower 2 and the drive shaft 9 are assembled, which facilitates the cooperation between the first bearing 22 and the connecting arm 23, so that the protrusion 232 can be fixed on the connecting arm 23, and avoids the first bearing 22 and the connecting arm 23 from disengaging.

[0083] In some embodiments of the present invention, such as Figure 2 , Figures 5-8 As shown, the inner circumferential wall of the connecting arm 23 is press-fitted with the inner circumferential wall of the first bearing 22, making the connection between the connecting arm 23 and the first bearing 22 simple and reliable, and preventing relative rotation between the connecting arm 23 and the first bearing 22; the fixing part 234 is press-fitted with the fixing hole on the transmission shaft 9. It can be understood that the fixing hole 92 is a non-circular hole, the fixing part 234 is a non-circular hole, and the fixing part 234 passes through the non-circular hole. The press-fitted connection between the fixing part 234 and the non-circular hole makes the connection between the connecting arm 23 and the transmission shaft 9 simple and reliable, and prevents relative rotation between the connecting arm 23 and the transmission shaft 9.

[0084] In this embodiment, the connecting arm 23 and the first bearing 22 are located at the cylindrical part 233, which facilitates the matching of the shapes of the connecting arm 23 and the first bearing 22.

[0085] In some embodiments of the present invention, such as Figure 9 and Figure 10As shown, the first bearing 22 is a needle roller bearing. The rollers of the needle roller bearing have a small diameter and a large length, resulting in a large contact area with the inner and outer rings. The load-bearing capacity per unit length is significantly higher than that of other types of rolling bearings, which allows the first bearing 22 to better withstand the rotational load in the helical groove 11 and increases the reliability of the first bearing 22.

[0086] In some embodiments of the present invention, such as Figure 1 and Figure 2 As shown, there are multiple spiral grooves 11, and the first bearing 22 and the connecting arm 23 are also multiple, corresponding one-to-one with the multiple spiral grooves 11. This allows for force transmission between the cam 1 and the drive shaft 9 at multiple points, increasing the reliability of force transmission between the cam 1 and the drive shaft 9.

[0087] In this embodiment, there are two spiral grooves 11, and two first bearings 22 and two connecting arms 23 corresponding to the two spiral grooves 11. The two first bearings 22 and the connecting arms 23 are arranged opposite each other along the radial direction of the transmission shaft 9, so that the support for the transmission shaft 9 is more reliable.

[0088] In some embodiments of the present invention, the shock absorber 100 further includes a drive member 3, which drives the cam 1 to rotate, thereby achieving active rotation of the cam 1. For example, when the shock absorber 100 is used in a vehicle, when the vehicle detects an uneven road surface ahead, the drive member 3 drives the cam 1 to rotate. After the cam 1 rotates, it drives the first bearing 22 to move along the extension direction of the helical groove 11, causing the drive shaft 9 to move along the axial direction of the cam 1, and the direction of movement is opposite to the direction of the unevenness of the road surface, so as to avoid large vibrations in the vehicle when the wheels pass over uneven road surfaces, and avoid affecting the driving experience of the users in the vehicle.

[0089] In some embodiments of the present invention, the driving component 3 is a drive motor, which is arranged around the cam 1. It can be understood that the drive motor is a rotary motor, with the drive motor acting as the stator and the rotor magnet attached to the outer periphery of the cam 1, which enables the drive motor to drive the cam 1, making the rotation of the cam 1 more reliable.

[0090] In some embodiments of the present invention, such as Figure 1 , Figure 11 and Figure 12 As shown, the shock absorber 100 also includes a lower fork arm 4, which is connected to the wheel bushing and fixedly connected to the drive shaft 9, enabling active control of the wheel. The lower fork arm 4, in conjunction with the axial movement of the drive shaft 9 along the cam 1, absorbs road impacts, effectively filters bumps, and improves the user's riding comfort.

[0091] In some embodiments of the present invention, such as Figure 4 , Figures 11-14As shown, the lower fork arm 4 and the drive shaft 9 are connected by a spline 5, which can prevent the lower fork arm 4 and the drive shaft 9 from rotating synchronously. At the same time, the lower fork arm 4 can suppress the rotation of the drive shaft 9 and resist the torque brought by the rotation of the cam 1. The first bearing 22 bears the load of the drive shaft 9 and avoids the drive shaft 9 from disintegrating and failing with the follower 2.

[0092] In some embodiments of the present invention, the shock absorber 100 further includes a mounting tower, which is fixedly connected to the drive shaft 9 to realize the connection between the shock absorber 100 and the vehicle body, making the connection of the shock absorber 100 simpler and more reliable.

[0093] In some embodiments of the present invention, the mounting tower and the drive shaft 9 are connected by a spline 5, which can prevent the synchronous rotation of the mounting tower and the drive shaft 9. At the same time, the rotation of the drive shaft 9 can be suppressed by the mounting tower. The first bearing 22 bears the load of the drive shaft 9, thus preventing the drive shaft 9 from disintegrating and failing with the follower 2.

[0094] Furthermore, spline 5 is a rectangular spline, which is simpler to manufacture and has a lower cost.

[0095] In this embodiment, the lower fork arm 4 and the drive shaft 9 are connected by a rectangular spline. An external spline 51 is added to the end of the drive shaft 9, and an internal spline 52 is added to the lower fork arm 4. The internal spline 52 and the external spline 51 cooperate to prevent the drive shaft 9 from rotating relative to the lower fork arm 4, thus achieving an anti-rotation design. At the same time, the external spline 51 at the end of the drive shaft 9 is a rectangular spline. In addition to resisting the action of external torque, the external spline 51 also has an axial positioning function, that is, the top of the external spline 51 is axially fixed to the top of the lower fork arm 4. The internal spline 52 of the lower fork arm 4 is also a rectangular spline. Its advantages are simple processing, low cost, no additional parts are used to resist the torque brought by the entire shock absorber 100, the structure is simple and effective, and it is easy to install and disassemble.

[0096] Of course, the present invention is not limited to this. Spline 5 can also be an involute spline, etc., and can be selected according to design requirements.

[0097] Meanwhile, based on the cooperation of the internal spline 52 and the external spline 51, an internal thread is machined at the end of the drive shaft 9 away from the cam 1, and the drive shaft 9 and the lower fork arm 4 are connected by bolts, which plays a role in secondary reinforcement.

[0098] In some embodiments of the present invention, such as Figure 1 and Figure 3 As shown, the shock absorber 100 also includes a housing assembly 6, which defines an installation space. The drive component 3 and the cam 1 are located within the installation space. The housing assembly 6 can protect the drive component 3 and the cam 1, preventing them from being damaged by external impacts and increasing the durability of the shock absorber 100.

[0099] In some embodiments of the present invention, such as Figure 1 and Figure 3 As shown, the axial direction of housing assembly 6 (e.g.) Figure 1 One end of the drive shaft 9 (in the first direction shown) is provided with a clearance hole 641. One axial section of the drive shaft 9 is located in the installation space, and the other end passes through the clearance hole 641 and extends out of the housing assembly 6. This can prevent the housing assembly 6 from being too large, prevent the shock absorber 100 from being too large, and increase the compatibility of the shock absorber 100.

[0100] In some embodiments of the present invention, such as Figure 1 , Figure 3 and Figure 5 As shown, one end of the drive shaft 9 is provided with a guide groove 91, which extends along the axial direction of the drive shaft 9. The damper 100 also includes a guide rod 7. One end of the guide rod 7 in the axial direction is fixedly connected to the end of the housing assembly 6 in the axial direction opposite to the drive shaft 9, and the other end extends into the guide groove 91. The guide rod 7 can provide guidance for the movement of the drive shaft 9 and increase the reliability of the movement of the guide rod 7.

[0101] In some embodiments of the present invention, such as Figure 1 As shown, both ends of the housing assembly 6 in the axial direction near the installation space are provided with protrusions 65. The cam 1 is sleeved on the protrusions 65, which can provide a position for the installation of the cam 1. The assembly of the cam 1 is relatively simple and reliable.

[0102] In some embodiments of the present invention, such as Figure 1 As shown, a second bearing 8 is provided between the protrusion 65 and the cam 1 to prevent wear on the housing assembly 6 when the cam 1 rotates, thus preventing damage to the housing assembly 6.

[0103] In some embodiments of the present invention, the second bearing 8 is a deep groove ball bearing. Deep groove ball bearings mainly bear radial loads and are suitable for complex working conditions. Deep groove ball bearings consist of an inner ring, an outer ring, rolling elements (steel balls), and a cage. They have fewer parts and a simpler structure. At the same time, deep groove ball bearings can be pre-filled with grease, reducing the need for regular maintenance.

[0104] In some embodiments of the present invention, such as Figure 1 and Figure 3As shown, the housing assembly 6 includes a first housing 61, a first end cap 63, and a second housing 62. The first housing 61 is arranged around the drive member 3 to protect the drive member 3 and prevent it from being damaged by external impact, thereby increasing the durability of the shock absorber 100. The first end cap 63 blocks one end of the first housing 61 in the axial direction. The second housing 62 is connected to the first housing 61 and is located at the other end of the first housing 61 in the axial direction. The outer diameter of the second housing 62 is smaller than that of the first housing 61, which avoids the housing assembly 6 occupying too much space when it is a single piece, thus preventing the shock absorber 100 from being too large during assembly and affecting its compatibility.

[0105] The present invention also proposes a suspension assembly having the shock absorber 100 of the above embodiments.

[0106] The suspension assembly according to an embodiment of the present invention includes a shock absorber 100.

[0107] According to the suspension assembly of the present invention, by providing the above-mentioned shock absorber 100, by limiting the cam 1 to rotate around the axis of the cam 1, the follower 2 that cooperates with the cam 1 rotates and generates movement in the axial direction of the cam 1. The drive shaft 9 is connected to a relatively fixed component, which restricts the rotation of the drive shaft 9, so that the drive shaft 9 can only generate movement in the axial direction of the cam 1. Furthermore, the connecting arm 23 is connected to the drive shaft 9 through the anti-rotation structure 10, which can restrict the relative rotation between the connecting arm 23 and the drive shaft 9, thereby preventing the connecting arm 23 from disengaging from the drive shaft 9, preventing the follower 2 from disengaging from the drive shaft 9, and preventing the shock absorber 100 from failing.

[0108] The present invention also proposes a vehicle having a suspension assembly according to the above embodiments.

[0109] The vehicle according to an embodiment of the present invention includes a suspension assembly.

[0110] According to the vehicle of the present invention, by providing the above-described suspension assembly and the above-described shock absorber 100, by limiting the cam 1 to rotate around the axis of the cam 1, the follower 2 that cooperates with the cam 1 rotates and generates movement in the axial direction of the cam 1. The drive shaft 9 is connected to a relatively fixed component, which restricts the rotation of the drive shaft 9, so that the drive shaft 9 can only generate movement in the axial direction of the cam 1. Furthermore, the connecting arm 23 is connected to the drive shaft 9 through the anti-rotation structure 10, which can restrict the relative rotation between the connecting arm 23 and the drive shaft 9, thereby preventing the connecting arm 23 from disengaging from the drive shaft 9, preventing the follower 2 from disengaging from the drive shaft 9, and preventing the shock absorber 100 from failing.

[0111] The following is for reference. Figures 1 to 14The following description of a vibration damper 100 according to a specific embodiment of the present invention is intended to explain the invention and should not be construed as limiting the invention.

[0112] Specifically, such as Figures 1 to 14 As shown, the shock absorber 100 includes a cam 1, a drive shaft 9, a follower 2, a drive component 3, a lower fork arm 4, and a housing assembly 6.

[0113] Furthermore, the cam 1 is rotatable about its axis, and a spiral groove 11 is provided on the inner peripheral wall of the cam 1. The spiral groove 11 extends spirally along the axial direction of the cam 1. The follower 2 includes a first bearing 22 and a connecting arm 23. One end of the transmission shaft 9 extends into the cam 1 in the axial direction, and one end of the connecting arm 23 is connected to the transmission shaft 9. The first bearing 22 is sleeved on the connecting arm 23 and located in the spiral groove 11. The driving member 3 is used to drive the cam 1 to rotate.

[0114] The first bearing 22 is a needle roller bearing. The rollers of the needle roller bearing have a small diameter and a large length, resulting in a large contact area with the inner and outer rings. The load-bearing capacity per unit length is significantly higher than that of other types of rolling bearings, which allows the first bearing 22 to better withstand the rotational load in the helical groove 11 and increases the reliability of the first bearing 22.

[0115] Furthermore, the connecting arm 23 and the drive shaft 9 are separately machined parts. When the first bearing 22 moves and rotates synchronously along the extension direction of the spiral groove 11, the drive shaft 9 only moves along the axial direction of the cam 1. The outer wall 221 and inner wall 222 of the first bearing 22 rotate relative to each other. The outer wall 221 rotates with the cam 1, and the inner wall 222 connects with the connecting arm 23. The axial dimension of the drive shaft 9 is relatively long, and the connecting arm 23 can absorb the torsional force on the first bearing 22 to a certain extent, avoiding the drive shaft 9 from breaking due to torsional force and increasing the reliability of the drive shaft 9. The connecting arm 23 passes through the drive shaft 9, which facilitates the connection between the drive shaft 9 and the first bearing 22 located on the axial outer side of the drive shaft 9.

[0116] Furthermore, the connecting arm 23 is provided with a stud portion 231, which is located on the side of the drive shaft 9 away from the first bearing 22. The damper 100 also includes a limiting nut, which is screwed onto the stud portion 231. After the limiting nut and the stud portion 231 are screwed together, the limiting nut can limit the drive shaft 9, preventing the drive shaft 9 from disengaging from the connecting arm 23 when it moves away from the first bearing 22, thereby increasing the reliability of the engagement between the drive shaft 9, the connecting arm 23, and the first bearing 22. The outer peripheral wall of the connecting arm 23 is provided with a protrusion 232, which is located on the side of the first bearing 22 away from the drive shaft 9. After the protrusion 232 is located, it can limit the first bearing 22, preventing the first bearing 22 from disengaging from the connecting arm 23 when it moves away from the drive shaft 9, thereby increasing the reliability of the engagement between the drive shaft 9, the connecting arm 23, and the first bearing 22.

[0117] The connecting arm 23 is provided with a cylindrical part 233 and a fixed part 234. The cylindrical part 233 is interference-fitted with the inner peripheral wall of the first bearing 22, which makes the connection between the connecting arm 23 and the first bearing 22 simple and reliable, and can prevent the connecting arm 23 and the first bearing 22 from rotating relative to each other. The transmission shaft 9 is provided with a non-circular hole that matches the fixed part 234. The fixed part 234 passes through the non-circular hole. The fixed part 234 is interference-fitted with the non-circular hole, which makes the connection between the connecting arm 23 and the transmission shaft 9 simple and reliable, and can prevent the connecting arm 23 and the transmission shaft 9 from rotating relative to each other.

[0118] There are two spiral grooves 11, and two first bearings 22 and two connecting arms 23 are arranged one-to-one with the two spiral grooves 11. The two first bearings 22 and connecting arms 23 are arranged opposite each other along the radial direction of the transmission shaft 9, so that the support of the transmission shaft 9 is more reliable.

[0119] The driving component 3 is a drive motor, which is arranged around the cam 1. The drive motor is a rotary motor, which serves as the stator. The rotor magnet is attached to the outer periphery of the cam 1, which enables the drive motor to drive the cam 1, making the rotation of the cam 1 more reliable.

[0120] The shock absorber 100 also includes a lower fork arm 4, which is connected to the wheel bushing. The lower fork arm 4 and the drive shaft 9 are connected by a rectangular spline to achieve active control of the wheel. The movement of the lower fork arm 4 in conjunction with the drive shaft 9 along the axial direction of the cam 1 absorbs road impacts, effectively filters bumps, and improves the user's riding comfort.

[0121] The housing assembly 6 defines the installation space, and the drive component 3 and cam 1 are located within the installation space. The housing assembly 6 can protect the drive component 3 and cam 1, prevent the drive component 3 and cam 1 from being damaged by external impact, and increase the durability of the shock absorber 100.

[0122] The housing assembly 6 includes a first housing 61, a first end cap 63, and a second housing 62. The first housing 61 surrounds the drive member 3, protecting it from damage caused by external impacts and increasing the durability of the shock absorber 100. The first end cap 63 blocks one end of the first housing 61 in the axial direction. The second housing 62 is connected to the first housing 61 and located at the other end of the first housing 61 in the axial direction. The outer diameter of the second housing 62 is smaller than that of the first housing 61, thus reducing the space occupied by the housing assembly 6 when it is a single piece. This prevents the shock absorber 100 from being too large during assembly and ensures its compatibility.

[0123] The housing assembly 6 also includes a second end cap 64, which is located at the end of the second housing 62 opposite to the first housing 61. The second end cap 64 has a clearance hole 641. One axial section of the drive shaft 9 is located in the installation space, and the other end passes through the clearance hole 641 and extends out of the housing assembly 6. This avoids the housing assembly 6 from being too large, thus preventing the shock absorber 100 from being too large and increasing the compatibility of the shock absorber 100. One end of the drive shaft 9 has a guide groove 91, which extends along the axial direction of the drive shaft 9. The first end cap 63 has a clearance groove 631. The shock absorber 100 also includes a guide rod 7. One axial end of the guide rod 7 extends into the clearance groove 631 and is fixedly connected to the first end cap 63, while the other end extends into the guide groove 91. The guide rod 7 can provide guidance for the movement of the drive shaft 9, increasing the reliability of the movement of the guide rod 7.

[0124] Both the first end cap 63 and the second end cap 64 have protrusions 65 on their end faces near the installation space. The cam 1 is sleeved on the protrusions 65. A deep groove ball bearing is provided between the protrusions 65 and the cam 1, which can provide a position for the installation of the cam 1. The assembly of the cam 1 is relatively simple and reliable.

[0125] The shock absorber 100 and other components and operations of the vehicle according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0126] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0127] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A vibration damper, characterized in that, include: Cam (1), the cam (1) being rotatable about the axis of the cam (1); Drive shaft (9); Follower (2), the follower (2) includes a connecting arm (23), one end of the connecting arm (23) is engaged with the cam (1), and the other end is connected to the drive shaft (9). The connecting arm (23) and the drive shaft (9) are integral parts, or the connecting arm (23) and the drive shaft (9) are connected by an anti-rotation structure (10). The anti-rotation structure (10) is used to restrict the connecting arm (23) from rotating relative to the drive shaft (9).

2. The vibration damper according to claim 1, characterized in that, The anti-rotation structure (10) includes a fixing part (234) and a fixing hole (92). The fixing part (234) is provided on the connecting arm (23), and the fixing hole (92) is provided on the transmission shaft (9). The cross-section of the fixing hole (92) is non-circular, and the cross-section of the fixing part (234) is non-circular and matches the fixing hole (92). At least a portion of the fixing part (234) is located inside the fixing hole (92).

3. The vibration damper according to claim 2, characterized in that, The inner peripheral wall of the cam (1) is provided with a spiral groove (11), the spiral groove (11) extends spirally along the axial direction of the cam (1), one end of the transmission shaft (9) extends into the cam (1) in the axial direction, and one end of the follower (2) is located in the spiral groove (11).

4. The vibration damper according to claim 3, characterized in that, The follower (2) also includes: The first bearing (22) is disposed in the spiral groove (11) and is sleeved on the connecting arm (23).

5. The vibration damper according to claim 4, characterized in that, The connecting arm (23) is provided with a stud portion (231), which is located on the side of the fixing portion (234) away from the first bearing (22). The damper (100) also includes a limiting nut, which is screwed to the stud portion (231).

6. The vibration damper according to claim 4, characterized in that, The outer peripheral wall of the connecting arm (23) is provided with a protrusion (232), which is located on the side of the first bearing (22) away from the fixing part (234).

7. The vibration damper according to claim 4, characterized in that, The connecting arm (23) is interference-fitted with the inner circumferential wall of the first bearing (22); the fixing part (234) is interference-fitted with the fixing hole (92) on the transmission shaft (9).

8. The vibration damper according to claim 4, characterized in that, The first bearing (22) is a needle roller bearing.

9. The vibration damper according to claim 4, characterized in that, There are multiple spiral grooves (11), and the first bearing (22) and the connecting arm (23) are multiple, each corresponding to one of the multiple spiral grooves (11).

10. The vibration damper according to claim 1, characterized in that, Also includes: The lower fork arm (4) is fixedly connected to the drive shaft (9).

11. The vibration damper according to claim 10, characterized in that, The lower fork arm (4) and the drive shaft (9) are connected by a spline (5).

12. The vibration damper according to claim 1, characterized in that, Also includes: The mounting tower and the drive shaft (9) are fixedly connected.

13. The vibration damper according to claim 12, characterized in that, The mounting tower and the drive shaft (9) are connected by a spline (5).

14. The vibration damper according to claim 11 or 13, characterized in that, The spline (5) is a rectangular spline.

15. The vibration damper according to claim 1, characterized in that, Also includes: A drive element (3) is used to drive the cam (1) to rotate.

16. The vibration damper according to claim 15, characterized in that, The driving component (3) is a drive motor, which is arranged around the cam (1).

17. The vibration damper according to claim 15, characterized in that, Also includes: The housing assembly (6) defines an installation space, and the drive (3) and the cam (1) are disposed within the installation space.

18. The vibration damper according to claim 17, characterized in that, One end of the housing assembly (6) in the axial direction is provided with a clearance hole (641), and one axial section of the drive shaft (9) is located in the installation space, while the other end passes through the clearance hole (641) and extends out of the housing assembly (6).

19. The vibration damper according to claim 17, characterized in that, One end of the drive shaft (9) is provided with a guide groove (91), the guide groove (91) extends along the axial direction of the drive shaft (9), and the vibration damper (100) further includes: The guide rod (7) has one axial end fixedly connected to the end of the housing assembly (6) opposite to the drive shaft (9) in the axial direction, and the other axial end of the guide rod (7) extends into the guide groove (91).

20. The vibration damper according to claim 17, characterized in that, The housing assembly (6) has protrusions (65) at both ends in the axial direction near the mounting space, and the cam (1) is sleeved on the protrusions (65).

21. The vibration damper according to claim 20, characterized in that, A second bearing (8) is provided between the protrusion (65) and the cam (1).

22. The vibration damper according to claim 21, characterized in that, The second bearing (8) is a deep groove ball bearing.

23. The vibration damper according to claim 17, characterized in that, The housing assembly (6) includes: A first housing (61) is disposed around the drive member (3); The first end cap (63) seals one end of the first housing (61) in the axial direction; The second housing (62) is connected to the first housing (61) and is located at the other end of the first housing (61) in the axial direction. The outer diameter of the second housing (62) is smaller than the outer diameter of the first housing (61).

24. A suspension assembly, characterized in that, include: The vibration damper (100) according to any one of claims 1-23.

25. A vehicle, characterized in that, include: The suspension assembly according to claim 24.

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