Actuator, suspension assembly, and vehicle

Abstract

The application discloses an actuator, a suspension assembly and a vehicle. The actuator comprises a transmission cam and an execution assembly, the transmission cam is provided with a guide structure, the guide structure is matched with the transmission, and the transmission cam drives the execution assembly to move along the axis direction of the transmission cam when the transmission cam moves; the execution assembly is provided with an oil storage cavity, the oil storage cavity is used for storing a lubricating medium, and the lubricating medium is used for realizing lubrication between the execution assembly and the guide structure. According to the actuator, the lubricating medium in the oil storage cavity can be used for lubrication between the execution assembly and the guide structure, the friction between the execution assembly and the transmission cam is reduced, and the problem of serious wear between the relatively moving execution assembly and the transmission cam is solved.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more specifically, to an actuator, a suspension assembly, and a vehicle. Background Technology

[0002] A vehicle comprises a body, wheels, and a suspension assembly connecting the body and wheels. The suspension assembly buffers the impact forces transmitted to the body from uneven road surfaces, ensuring a smooth ride. The height of the suspension assembly is adjustable to change the distance between the body and the wheels. With prolonged use, friction between the relatively moving parts within the suspension assembly leads to a shorter lifespan for these components, affecting vehicle handling. Summary of the Invention

[0003] This application aims to at least partially address one of the aforementioned technical problems in the prior art. To this end, this application proposes an actuator that solves the problem of severe wear between relatively moving components.

[0004] This application also proposes a suspension assembly having the aforementioned actuator.

[0005] This application also proposes a vehicle having the aforementioned suspension components.

[0006] The actuator according to an embodiment of this application includes: a transmission cam and an actuation component. The transmission cam is provided with a guide structure and cooperates with the guide structure for transmission. When the transmission cam moves, it drives the actuation component to move along the axial direction of the transmission cam. The actuation component is provided with an oil storage chamber for storing a lubricating medium, which is used to achieve lubrication between the actuation component and the guide structure.

[0007] According to the actuator of the present application embodiment, by providing an oil reservoir in the actuating component and enabling the lubricating medium in the oil reservoir to be used for lubrication between the actuating component and the guide structure, it is beneficial to reduce the friction between the actuating component and the transmission cam, and solve the problem of severe wear between the relatively moving actuating component and the transmission cam.

[0008] The actuating component includes an output member and a follower, the follower engaging with the guide structure for transmission; the follower is connected to the output member, the output member engaging with the transmission cam via the follower, and when one of the transmission cam and the output member rotates, the transmission cam and the output member can move relative to each other along the axial direction of the actuator; one of the transmission cam and the output member is adapted to be connected to the vehicle body, and the other is adapted to be connected to the wheel.

[0009] According to some embodiments of this application, the oil reservoir is formed within the follower, the oil reservoir is used to store lubricating medium, and when the transmission cam rotates relative to the output member, it can deliver the lubricating medium in the oil reservoir to the gap between the guide groove and the follower.

[0010] According to some embodiments of this application, the follower includes: a storage member and a follower member, the oil storage cavity is formed in the storage member, the storage member is mounted on the follower member, the follower member is rotatably connected to the output member, at least a portion of the follower member is accommodated in the guide structure, and the follower member has a first flow channel communicating between the oil storage cavity and the guide structure.

[0011] According to some embodiments of this application, the actuator further includes a first bearing, the output member has a first mounting hole, and the follower is rotatably mounted in the first mounting hole via the first bearing.

[0012] According to some embodiments of this application, the first bearing includes: a first inner ring, a first outer ring, and a first rolling element. The first inner ring is mounted on the follower and can rotate with the follower. The first outer ring is sleeved on the outer periphery of the first inner ring and is fixedly mounted in the first mounting hole. The first rolling element is disposed between the first inner ring and the first outer ring. At least one of the first inner ring and the first outer ring is provided with a raceway groove, and the first rolling element is rotatably mounted in the raceway groove.

[0013] According to some embodiments of this application, the first rolling element is a needle roller.

[0014] According to some embodiments of this application, the follower includes a first rod portion, a second rod portion, and a flange portion. The flange portion connects the first rod portion and the second rod portion. At least a portion of the first rod portion is accommodated in the guide structure. A first inner ring is mounted on the second rod portion and abuts against the side of the flange portion opposite to the guide structure.

[0015] According to some embodiments of this application, the follower has a limiting and fixing groove, and the storage member includes a body part and a limiting and fixing part. The oil storage cavity is formed in the body part, the limiting and fixing part is connected to the body part, the limiting and fixing part extends into the limiting and fixing groove and is fixed in the limiting and fixing groove, and a second flow channel is formed in the limiting and fixing part. The second flow channel connects the oil storage cavity and the first flow channel.

[0016] According to some embodiments of this application, the limiting and fixing groove includes a limiting groove and a fixing groove. The limiting groove is located on the side of the fixing groove opposite to the guide structure. The limiting and fixing part includes a limiting boss and a fixing part. The limiting boss is connected to the main body and extends into the limiting groove. The fixing part is located on the side of the limiting boss facing the guide structure and is fixed to the fixing groove. The limiting groove and the fixing groove are connected by a limiting wall, which is used to limit the extreme position of the limiting boss extending into the limiting groove.

[0017] According to some embodiments of this application, the body portion is a rubber sleeve.

[0018] According to some embodiments of this application, the second flow channel includes a plurality of Tesla valve units, which are connected to each other. Each Tesla valve unit includes an oblique channel, an arc channel, and a straight channel. The oblique channel is located on the side of the arc channel near the oil storage chamber, and the straight channel is located on the side of the arc channel near the first flow channel.

[0019] According to some embodiments of this application, the oblique channel is connected to the straight channel and the included angle between them is θ1, one end of the arc channel is connected to the end of the oblique channel and is tangent to it, the other end of the arc channel is connected to the straight channel, and the included angle between the tangent of the other end of the arc channel and the straight channel is θ2, where θ2 < θ1 < 90°.

[0020] According to some embodiments of this application, the actuator further includes a drive member connected to one of the transmission cam and the output member to drive the one of the transmission cam and the output member to rotate.

[0021] According to some embodiments of this application, the drive member is used to drive the transmission cam to rotate, the transmission cam is adapted to be connected to the vehicle body, and the output member is adapted to be connected to the wheel; the actuator also includes a housing, one end of the transmission cam is supported on the housing by a second bearing, and the other end of the transmission cam is supported on the housing by a third bearing.

[0022] According to some embodiments of this application, the output member has a guide hole that extends along the length of the output member, and the actuator further includes a guide rod that is connected to the transmission cam and extends into the guide hole and guides the guide hole.

[0023] According to some embodiments of this application, the housing includes an outer shell and a lower end cover. The lower end cover covers the lower opening of the outer shell. The upper end of the transmission cam is supported on the outer shell by a second bearing, and the lower end of the transmission cam is supported on the lower end cover by a third bearing.

[0024] According to some embodiments of this application, the upper end of the output component is disposed inside the housing, the lower end of the output component extends downward out of the housing, and the actuator further includes a lower fork arm, which is disposed below the housing and fixedly connected to the output component.

[0025] According to some embodiments of this application, the output component includes an output component body and a plurality of support arms connected to the output component body, and each support arm is provided with a follower.

[0026] The suspension system according to a second aspect of this application includes the actuator described above.

[0027] The suspension assembly also includes a strut top adapted to be connected to the vehicle body, and one of the drive cam and the actuator assembly is adapted to be connected to the vehicle body via the strut top.

[0028] According to some embodiments of this application, the actuator further includes a housing, the transmission cam is disposed within the housing, and the housing is adapted to be connected to the vehicle body via the tower top.

[0029] According to the suspension system of this application embodiment, the actuator has an oil reservoir in the actuator component, and the lubricating medium in the oil reservoir can be used for lubrication between the actuator component and the guide structure. This helps to reduce the friction between the actuator component and the transmission cam and solve the problem of severe wear between the relatively moving actuator component and the transmission cam.

[0030] The vehicle according to another aspect of this application includes the suspension assembly described above.

[0031] According to the embodiments of the present application, the actuator of the suspension assembly has an oil reservoir in the actuator assembly, and the lubricating medium in the oil reservoir can be used for lubrication between the actuator assembly and the guide structure. This helps to reduce the friction between the actuator assembly and the transmission cam and solve the problem of severe wear between the relatively moving actuator assembly and the transmission cam.

[0032] Additional aspects and advantages of this application 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 this application. Attached Figure Description

[0033] Figure 1 This is a perspective view of an actuator according to an embodiment of this application;

[0034] Figure 2 This is a cross-sectional schematic diagram of an actuator (without a guide rod) according to an embodiment of this application;

[0035] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle;

[0036] Figure 4 This is a cross-sectional schematic diagram of the servo;

[0037] Figure 5 It is a 3D schematic diagram of the output component;

[0038] Figure 6 This is the main view of the output component;

[0039] Figure 7 This is a cross-sectional view of the output component;

[0040] Figure 8 This is a side view of the output component;

[0041] Figure 9 This is a three-dimensional schematic diagram of the first bearing;

[0042] Figure 10 This is a cross-sectional schematic diagram of the first bearing;

[0043] Figure 11 It is a three-dimensional schematic diagram of the follower;

[0044] Figure 12 This is a cross-sectional schematic diagram of the follower;

[0045] Figure 13 This is a three-dimensional schematic diagram of the storage component;

[0046] Figure 14 This is the front view of the storage component;

[0047] Figure 15 This is a cross-sectional schematic diagram of the storage component;

[0048] Figure 16 This is a schematic diagram of the second flow channel;

[0049] Figure 17 This is a schematic diagram of a Tesla valve unit;

[0050] Figure 18 It is a cross-sectional schematic diagram of the housing and bushing;

[0051] Figure 19 This is a cross-sectional schematic diagram of an actuator (with a guide rod) according to an embodiment of this application;

[0052] Figure 20 This is a schematic diagram of the guide path of the first guide groove and the second guide groove according to an embodiment of this application;

[0053] Figure 21 This is a schematic diagram of a vehicle according to an embodiment of this application.

[0054] Figure label:

[0055] Vehicle 1000, suspension components 100, wheels 200, body 300;

[0056] Actuator 10, Housing 1, Outer Housing 11, Lower End Cover 12, End Cover Through Hole 121, Transmission Cam 2, Guide Structure 21, Outer Ring Surface 211, Inner Ring Surface 212, First Guide Structure 213, Second Guide Structure 214, Output Component 3, Output Component Body 31, Support Arm 32, First Mounting Hole 33, Stop Feature 331, Guide Hole 34, Follower 4, Storage Component 41, Body Part 411, Limiting and Fixing Part 412, Limiting Boss 4121, Fixing Part 4122, Oil Storage Chamber 413, Second Flow Channel 414, Tesla Valve Unit 4141, Inclined Channel 41411, Arc channel 41412, Straight channel 41413, Inlet 41414, Outlet 41415, Follower 42, First rod 421, Second rod 422, Flange 423, Limiting and fixing groove 424, Limiting groove 4241, Fixing groove 4242, Limiting wall 4243, First flow channel 425, Sealing gasket 43, Drive component 5, First bearing 61, First inner ring 611, First outer ring 612, First rolling element 613, Second bearing 62, Third bearing 63, Lower fork arm 7, Bushing 8, Guide rod 9, Tower top 20. Detailed Implementation

[0057] The embodiments of this application 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 intended to explain this application, and should not be construed as limiting this application.

[0058] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0059] The following is combined Figures 1-21 The present application describes in detail an actuator 10, a suspension assembly 100 having the actuator 10, and a vehicle 1000 having the suspension assembly 100 according to embodiments of the present application.

[0060] Reference Figures 1-2 , Figure 19 As shown, the actuator 10 according to an embodiment of this application includes: a transmission cam 2 and an actuation component.

[0061] The transmission cam 2 is equipped with a guide structure 21.

[0062] The actuator works in conjunction with the guide structure 21 for transmission. When the transmission cam 2 moves, it drives the actuator to move along the axis of the transmission cam 2.

[0063] One of the drive cam 2 and the actuator assembly is adapted to be connected to the vehicle body 300, and the other is adapted to be connected to the wheel 200. For example, the drive cam 2 may be connected to the vehicle body 300, and the actuator assembly may be connected to the wheel 200; alternatively, the actuator assembly may be connected to the vehicle body 300, and the drive cam 2 may be connected to the wheel 200. When the drive cam 2 moves, it drives the actuator assembly to move along the axis of the drive cam 2, thereby changing the length of the actuator 10 and thus changing the distance between the vehicle body 300 and the wheel 200.

[0064] The actuator is provided with an oil reservoir 413 for storing lubricating medium, which is used to lubricate the actuator and the guide structure 21. In this way, when the actuator and the transmission cam 2 move relative to each other, the lubrication of the lubricating medium can reduce the wear of the actuator and the transmission cam 2.

[0065] According to the embodiment of this application, the actuator 10 provides an oil reservoir 413 in the actuating component and uses the lubricating medium in the oil reservoir 413 for lubrication between the actuating component and the guide structure 21. This helps to reduce the friction between the actuating component and the transmission cam 2, solves the problem of severe wear between the actuating component and the transmission cam 2, and thus solves the problem of severe wear between relatively moving parts.

[0066] In some embodiments of this application, reference is made to Figures 1-2 , Figure 19 As shown, the actuating components include an output element 3 and a follower 4, which engages with a guide structure 21 for transmission. For example, the guide structure 21 is configured as a groove formed inside the transmission cam 2, or alternatively, the guide structure 21 is formed as a guide slot. At least a portion of the follower 4 is accommodated in the guide structure 21, and the follower 4 is movable relative to the guide structure 21 along the profile of the guide structure 21 within the guide structure 21.

[0067] Follower 4 is connected to output component 3. Output component 3 is connected to transmission cam 2 through follower 4. When either transmission cam 2 or output component 3 rotates, transmission cam 2 and output component 3 can move relative to each other along the axis of transmission cam 2.

[0068] One of the transmission cam 2 and the output component 3 is adapted to be connected to the body 300, and the other is adapted to be connected to the wheel 200.

[0069] The actuator 10 also includes a housing 1, within which the transmission cam 2 is housed. Specifically, the housing 1 provides protection for the transmission cam 2 and the output component 3, preventing damage or impact to them. When the actuator 10 is applied to the vehicle 1000, the transmission cam 2 and the output component 3 are connected via a follower 4. When one of the transmission cam 2 or the output component 3 rotates, the transmission cam 2 and the output component 3 move relative to each other along the axis of the transmission cam 2, thereby adjusting the length of the actuator 10. This changes the distance between the vehicle body 300 and the wheel 200, for example, allowing the vehicle body 300 to be maintained at a suitable height to ensure stability and buffer the impact force transmitted to the vehicle body 300 from uneven road surfaces, achieving a vibration reduction effect on the vehicle 1000 and ensuring the smoothness of the vehicle's ride.

[0070] In some embodiments not shown in the figure, the transmission cam 2 is connected to the vehicle body 300, and the output component 3 is connected to the wheel 200. The output component 3 is a rotating component. When the output component 3 rotates, the transmission cam 2 remains stationary, and the output component 3 moves along the axial direction of the transmission cam 2.

[0071] In some other embodiments not shown in the figure, the output component 3 is connected to the vehicle body 300, the transmission cam 2 is connected to the wheel 200, the transmission cam 2 is a rotating component, and when the transmission cam 2 rotates, the output component 3 remains stationary, and the transmission cam 2 moves along the axial direction of the transmission cam 2.

[0072] In some embodiments, refer to Figures 1-2 , Figure 19 As shown, the transmission cam 2 is connected to the vehicle body 300, and the output component 3 is connected to the wheel 200. The transmission cam 2 is a rotating component; when the transmission cam 2 rotates, the output component 3 moves along the axis of the transmission cam 2. This application will use this as an example in the following descriptions; other types will not be described in detail.

[0073] Reference Figures 2-3 , Figure 19 As shown, an oil reservoir 413 is formed within the follower 4. The oil reservoir 413 stores lubricating medium. When either the drive cam 2 or the output member 3 rotates, the lubricating medium in the oil reservoir 413 is delivered to the gap between the guide structure 21 and the follower 4. The lubricating medium forms an oil film between the guide structure 21 and the follower 4. When either the drive cam 2 or the output member 3 rotates, this lubricating medium effectively reduces the friction between the guide structure 21 and the follower 4, preventing severe wear on the drive cam 2 and the follower 4.

[0074] exist Figures 1-3 , Figure 19 In the example, the transmission cam 2 rotates to drive the output component 3 to move along the axis of the transmission cam 2. During this process, the lubricating medium in the oil reservoir 413 can reach the gap between the guide structure 21 and the follower 4. The lubricating medium in the gap between the guide structure 21 and the follower 4 can be coated more evenly between the guide structure 21 and the follower 4.

[0075] Alternatively, the lubricating medium may be lubricating oil or lubricating grease.

[0076] According to the embodiment of this application, the actuator 10 provides an oil storage chamber 413 in the follower 4, and enables the lubricating medium in the oil storage chamber 413 to be delivered to the gap between the guide structure 21 and the follower 4. This helps to reduce the friction between the follower 4 and the transmission cam 2, and solves the problem of severe wear of the follower 4 and the transmission cam 2.

[0077] In some embodiments of this application, reference is made to Figures 2-4 , Figure 19 As shown, the follower 4 includes a storage member 41 and a follower 42. An oil storage cavity 413 is formed in the storage member 41. The storage member 41 is mounted on the follower 42. The follower 42 is rotatably connected to the output member 3. At least a portion of the follower 42 is housed in the guide structure 21. The follower 42 has a first flow channel 425 that connects the oil storage cavity 413 and the guide structure 21.

[0078] The first flow channel 425 is used to guide the lubricating medium in the oil reservoir 413 to the gap between the guide structure 21 and the follower 42, for example, referring to Figure 2 As shown, the guide structure 21 may include an outer ring surface 211 and an inner ring surface 212. The outer ring surface 211 is arranged around the axis of the actuator 10, and the inner ring surface 212 is arranged around the axis of the follower 42. The outer ring surface 211 of the guide structure 21 is directly opposite the end of the first flow channel 425. The first flow channel 425 can export the lubricating medium in the oil storage chamber 413 to the outer ring surface 211, which facilitates the lubrication of the outer ring surface 211 of the guide structure 21 and the end of the follower 42. The lubricating grease on the outer ring surface 211 can further reach the inner ring surface 212, which facilitates the lubrication of the inner ring surface 212 of the guide structure 21 and the outer peripheral surface of the follower 42.

[0079] In some embodiments of this application, reference is made to Figures 2-3 , Figures 5-8 , Figure 19As shown, the actuator 10 also includes a first bearing 61, the output member 3 has a first mounting hole 33, and the follower 42 is rotatably mounted in the first mounting hole 33 via the first bearing 61. Since the follower 42 is rotatably mounted in the first mounting hole 33 via the first bearing 61, when the transmission cam 2 and the output member 3 rotate relative to each other, the follower 42 can roll forward in the guide structure 21 and rotate on its own.

[0080] If the follower 42 only slides relative to the guide structure 21 of the transmission cam 2, the wear on the guide structure 21 will be severe, the guide structure 21 will be difficult to manufacture, and the cost will be high. Therefore, the part of the follower 42 inside the guide structure 21 needs to rotate, which is equivalent to a part of the follower 42 rolling forward in the guide structure 21. Therefore, the follower 42 is mounted to the output component 3 through the first bearing 61, and the follower 42 can rotate relative to the output component 3. The first bearing 61 is a rolling bearing, which allows the follower 42 to roll within the guide structure 21, reducing the friction between the follower 42 and the guide structure 21, thereby reducing the wear between the follower 42 and the transmission cam 2.

[0081] In some embodiments of this application, reference is made to Figures 2-3 , Figures 5-10 , Figure 19 As shown, the first bearing 61 includes a first inner ring 611, a first outer ring 612, and a first rolling element 613. The first inner ring 611 is mounted on the follower 42 and can rotate with the follower 42. The first outer ring 612 is sleeved on the outer circumference of the first inner ring 611 and is fixedly mounted in the first mounting hole 33. The first rolling element 613 is disposed between the first inner ring 611 and the first outer ring 612. At least one of the first inner ring 611 and the first outer ring 612 is provided with a raceway groove, and the first rolling element 613 is rotatably mounted in the raceway groove.

[0082] Specifically, the first outer ring 612 is located radially outside the first inner ring 611, and the first outer ring 612 is separated from the first inner ring 611 to facilitate the placement of the first rolling element 613 between the first outer ring 612 and the first inner ring 611.

[0083] In this application, the first bearing 61 is a rolling bearing. A rolling bearing is provided between the follower 42 and the output member 3. Compared with a bearing that cannot roll, the sliding friction between the follower 42 and the guide structure 21 can be transformed into rolling friction, which greatly reduces friction loss.

[0084] In some embodiments of this application, reference is made to Figures 2-3 , Figures 5-10 , Figure 19As shown, the first rolling element 613 is a needle roller, that is, the first bearing 61 is a needle roller bearing. The needle roller bearing can withstand a certain axial force, that is, the force of the transmission cam 2 in the radial direction of the follower 42.

[0085] In this application, a needle roller bearing is provided between the follower 42 and the output member 3. Compared with ordinary rolling bearings, the needle roller bearing of the present invention can withstand a certain axial force without being damaged.

[0086] The advantages of the needle roller bearing in this application compared to ball bearings in related technologies are as follows: ball bearings have a small bearing area and are prone to severe mechanical damage under high-speed operation. Therefore, needle roller bearings are often used in heavy-load mechanical transmissions to increase the bearing surface, improve mechanical transmission efficiency, and reduce mechanical damage. In the field of actuators (or shock absorbers) for vehicles 1000, the transmission cam 2 and output component 3 need to bear extremely high loads, so needle roller bearings are superior to ball bearings.

[0087] In some embodiments, the raceway groove corresponds one-to-one with the first rolling element 613. The raceway groove is used to keep the first rolling element 613 rolling in place within the raceway groove. In this way, the position of the first rolling element 613 between the first inner ring 611 and the first outer ring 612 is determined, which is beneficial to improving the working reliability of the first bearing 61.

[0088] The first bearing 61 may further include a retainer disposed between the first inner ring 611 and the first outer ring 612 for retaining the first rolling element 613 within the raceway groove.

[0089] The first outer ring 612 can be manufactured as a single piece by stamping, or it can be divided into two halves, which work together to seal the first inner ring 611 and the first rolling element 613 inside.

[0090] In some other embodiments of this application, the first rolling element 613 may also be a ball.

[0091] In some embodiments of this application, reference is made to Figures 2-3 , Figures 5-8 As shown, the first mounting hole 33 has a stop feature 331 inside. When the first bearing 61 is installed in the first mounting hole 33, the first outer ring 612 abuts against the stop feature 331. The stop feature 331 is used to axially limit the first outer ring 612 of the first bearing 61. Specifically, it axially limits the end face of the first outer ring 612 that is close to the center of the actuator 10 to prevent the first outer ring 612 from moving axially.

[0092] In some embodiments of this application, reference is made to Figures 2-4 , Figures 9-12 , Figure 19As shown, the follower 42 includes a first rod portion 421, a second rod portion 422, and a flange portion 423. The flange portion 423 connects the first rod portion 421 and the second rod portion 422. At least a portion of the first rod portion 421 is housed in the guide structure 21. A first inner ring 611 is mounted on the second rod portion 422. The first inner ring 611 abuts against the side of the flange portion 423 opposite to the guide structure 21.

[0093] In some embodiments of this application, the follower 42 is a rotary shaft, the outer diameter of the flange portion 423 is greater than the outer diameter of the second rod portion 422, and the outer diameter of the flange portion 423 can be greater than the outer diameter of the first rod portion 421, or less than the outer diameter of the first rod portion 421, or equal to the outer diameter of the first rod portion 421.

[0094] In some embodiments, the first inner ring 611 and the second rod portion 422 may be an interference fit, thereby making the first bearing 61 and the follower 42 closely connected, and the first bearing 61 is not easy to fall off the follower 42.

[0095] In other embodiments, the first inner ring 611 and the second rod portion 422 may be a clearance fit or a transition fit. In a specific embodiment, a retaining ring can be provided on the follower 42 to stop the side of the first inner ring 611 away from the flange portion 423, thereby limiting the axial position of the first inner ring 611 between the retaining ring and the flange portion 423.

[0096] Since the second rod portion 422 of the follower 42 is rotatably mounted in the first mounting hole 33 via the first bearing 61, the first rod portion 421 of the follower 42 rolls forward within the guide structure 21 when the transmission cam 2 and the output member 3 rotate relative to each other. For example, the first rod portion 421 is constructed as a cylinder, and when the transmission cam 2 and the output member 3 move relative to each other, the end of the first rod portion 421 away from the second rod portion 422 rolls back and forth against the inner wall of the guide structure 21. In this way, the follower 42 can rotate around its own axis, achieving self-rotation.

[0097] In some embodiments of this application, reference is made to Figures 2-4 , Figures 11-15 , Figure 19 As shown, the follower 42 has a limiting and fixing groove 424. The storage member 41 includes a body part 411 and a limiting and fixing part 412. An oil storage cavity 413 is formed in the body part 411. The limiting and fixing part 412 is connected to the body part 411 and extends into the limiting and fixing groove 424 and is fixed in the limiting and fixing groove 424. A second flow channel 414 is formed in the limiting and fixing part 412, which connects the oil storage cavity 413 and the first flow channel 425. The lubricating medium in the oil storage cavity 413 can flow into the first flow channel 425 through the second flow channel 414, and then flow into the gap between the guide structure 21 and the follower 4 through the first flow channel 425.

[0098] In some embodiments, the limiting and fixing part 412 is a rotating body, the axial direction of the limiting and fixing part 412 is consistent with the radial direction of the actuator 10, and the second flow channel 414 passes through the limiting and fixing part 412 along the axial direction of the limiting and fixing part 412.

[0099] In some embodiments, the follower 42 is a rotating body, the axial direction of the follower 42 is consistent with the radial direction of the actuator 10, and the first flow channel 425 passes through the follower 42 along the axial direction of the follower 42.

[0100] In some embodiments of this application, reference is made to Figures 2-4 , Figures 11-15 , Figure 19 As shown, the limiting and fixing groove 424 includes a limiting groove 4241 and a fixing groove 4242. The limiting groove 4241 is located on the side of the fixing groove 4242 away from the guide structure 21. The limiting and fixing part 412 includes a limiting boss 4121 and a fixing part 4122. The limiting boss 4121 is connected to the main body part 411 and extends into the limiting groove 4241. The fixing part 4122 is located on the side of the limiting boss 4121 facing the guide structure 21 and is fixed to the fixing groove 4242. The limiting groove 4241 and the fixing groove 4242 are connected by a limiting wall 4243. The limiting wall 4243 is used to limit the extreme position of the limiting boss 4121 extending into the limiting groove 4241.

[0101] For example, in some embodiments, reference Figures 2-4 , Figures 11-15 , Figure 19 As shown, the fixing groove 4242 has an internal thread, and the fixing part 4122 has an external thread. The fixing part 4122 and the fixing groove 4242 are tightened together by the thread, thereby realizing the installation and fixing of the storage part 41 on the follower 42.

[0102] In some other embodiments not shown in the figure, the fixing groove 4242 has a locking hole, and the fixing part 4122 has a buckle. When the buckle engages with the locking hole, the storage member 41 is fixed on the follower member 42.

[0103] Reference Figures 2-4 , Figures 11-15 , Figure 19As shown, the limiting groove 4241 is constructed as a countersunk limiting structure, and the limiting boss 4121 extends into the limiting groove 4241, which can realize the limiting of the storage part 41 on the follower 42. Specifically, when the fixing part 4122 is screwed into the fixing groove 4242, when the radial end face of the limiting boss 4121 abuts against the limiting wall 4243, the fixing part 4122 can no longer move further into the fixing groove 4242. The limiting boss 4121 cooperates with the limiting groove 4241, and the limiting wall 4243 restricts the extreme position of the storage part 41 on the follower 42.

[0104] In some embodiments, refer to Figures 2-4 , Figures 11-15 , Figure 19 As shown, both the limiting boss 4121 and the fixing part 4122 are rotating bodies. The axial direction of the limiting boss 4121 and the fixing part 4122 is consistent with the radial direction of the actuator 10. The second flow channel 414 passes through the limiting and fixing part 412 along the axial direction of the limiting boss 4121 and the fixing part 4122.

[0105] Reference Figures 3-4 As shown, a sealing gasket 4343 is provided at the mating point between the storage component 41 and the follower component 42. The sealing gasket 4343 can perform a sealing function to prevent the lubricating medium in the first flow channel 425 and the second flow channel 414 from leaking through the gap between the storage component 41 and the follower component 42. Specifically, the sealing gasket 4343 can be sleeved on the second rod portion 422 of the follower component 42, and the sealing gasket 4343 is in contact with the body portion 411 of the storage component 41.

[0106] One advantage of the follower 42 in this application compared to traditional followers is that traditional followers have an external thread at the tail and require an additional nut to be fixed to the follower, providing a stress point during installation. In contrast, the follower 42 in this application only requires the second rod 422 to be pressed into the first bearing 61 by interference fit; it does not require an external thread or a tightening nut, resulting in a simpler design, simpler manufacturing process, and lower cost.

[0107] Two advantages of the follower 42 in this application compared to traditional followers are as follows: The follower 42 in this application is provided with a first flow channel 425, which facilitates the entry of lubricating media such as lubricating fluid or grease from the oil reservoir 413 into the guide structure 21, constantly lubricating the contact surface between the follower 42 and the guide structure 21, reducing the coefficient of friction between the two, reducing wear, and improving durability. In contrast, traditional followers slide in contact with the guide structure 21 without a lubricating medium, resulting in greater wear between the traditional follower and the transmission cam 2.

[0108] The follower 42 of this application has three advantages over traditional follower 42: the follower 42 of this application is provided with a limiting and fixing groove 424 for external connection, which can cooperate with the storage member 41 for storing lubricating medium such as lubricating liquid or grease, to ensure that the lubricating medium in the storage member 41 can be supplied to the outside, thereby ensuring sufficient lubrication between the follower 42 and the guide structure 21.

[0109] In some embodiments of this application, the body portion 411 of the storage member 41 is a rubber sleeve. For example, see reference to... Figures 13-15 As shown, the main body 411 is a hollow rubber sleeve in the shape of a persimmon. There is a limiting boss 4121 at the center of one side of the rubber sleeve. The limiting boss 4121 is used to prevent the rubber sleeve from contacting other parts during rotation and causing unnecessary wear. The limiting boss 4121 is provided with a fixing part 4122, which is constructed as a stud and is used to fix it to the follower 42.

[0110] In specific embodiments, the rubber used for the rubber sheath can be either soft rubber or hard rubber. Soft rubber can adapt to the amount of lubricating medium stored inside, while hard rubber has a more stable shape and its structure is not easily changed by the amount of lubricating medium.

[0111] In some other embodiments of this application, the body part 411 may also be a plastic box, a plastic bag, a metal box, etc.

[0112] In some embodiments of this application, reference is made to Figures 2-3 , Figures 16-17 , Figure 19 As shown, the second flow channel 414 includes multiple Tesla valve units 4141, which are interconnected. Specifically, the second flow channel 414 has a unique structure; it is not a typical straight pipe or a simple curve, but rather a flow channel in the form of a Tesla valve. (Refer to...) Figures 16-17 As shown, there are multiple Tesla valve units 4141 between the inlet 41414 and the outlet 41415 of the second flow channel 414. The Tesla valve units 4141 are constructed as loop channels. Gas or liquid enters from the inlet 41414 at a high speed, flows through several loop channels, and exits from the outlet 41415 at a very low speed.

[0113] Reference Figures 16-17As shown, the inclined channel 41411, the arc channel 41412, and the straight channel 41413 are interconnected. Taking the lubricating medium as an example, when the fluid flows from the outlet 41415 of the second flow channel 414 to the inlet 41414, the fluid splits into two paths at the return port of each loop. The two paths then converge at the next junction, achieving acceleration. Conversely, if the fluid flows from the inlet 41414 to the outlet 41415, it also splits into two paths at the first junction and converges again at the second junction. However, this time, the flow directions of the two paths are opposite, creating significant resistance. Therefore, the flow channel in the Tesla valve type can only allow unidirectional flow and is difficult to reverse.

[0114] Reference Figures 16-17 As shown, each Tesla valve unit 4141 includes: an inclined channel 41411, an arc channel 41412, and a straight channel 41413. The inclined channel 41411 is located on the side of the arc channel 41412 near the oil reservoir 413, and the straight channel 41413 is located on the side of the arc channel 41412 near the first flow channel 425.

[0115] Reference Figures 16-17 As shown, the inclined channel 41411 is connected to the straight channel 41413 at an angle of θ1. One end of the arc channel 41412 is connected to and tangent to the end of the inclined channel 41411, and the other end of the arc channel 41412 is connected to the straight channel 41413. The angle between the tangent at the other end of the arc channel 41412 and the straight channel 41413 is θ2, where θ2 < θ1 < 90°. This ensures that when the fluid flows from the inlet 41414 to the outlet 41415, the fluid will split into two paths at the first junction and converge again at the second junction. At the second junction, the flow directions of the two fluid paths are opposite.

[0116] It should be noted that the first junction is Figure 17 The intersection at point B shown is the second intersection. Figure 17 The intersection at point C shown.

[0117] When the straight channel 41413 is arranged horizontally, the angle between the other end of the arc channel 41412 and the horizontal line is θ2. The length of the part of the inclined channel 41411 that does not intersect with other channels is L1, and the length of the part of the straight channel 41413 that does not intersect with other channels is L2. Generally, the value is L1 = L2.

[0118] The widths of the inclined channel 41411, the circular arc channel 41412, and the straight channel 41413 are all the same, which is d. The outer radius of the circular arc channel 41412 is R, which can be adaptively selected according to the size of θ1, θ2, and d.

[0119] In some embodiments of this application, 40°≤θ1≤60°, θ2=18°. For example, θ1 can be 40°, 48°, 52°, 60°, etc.

[0120] In some embodiments of this application, the Tesla valve may be installed not only in the second flow channel 414 of the storage member 41, but also on the end face of the follower member 42.

[0121] In some embodiments of this application, reference is made to Figures 1-2 , Figure 19 As shown, the actuator 10 also includes a drive member 5, which is connected to one of the transmission cam 2 and the output member 3 to drive one of the transmission cam 2 and the output member 3 to rotate. For example, the drive member 5 is connected to the transmission cam 2 to drive the transmission cam 2 to rotate; or the drive member 5 is connected to the output member 3 to drive the output member 3 to rotate.

[0122] In some embodiments of this application, the drive member 5 is used to drive the transmission cam 2 to rotate. The transmission cam 2 is adapted to be connected to the vehicle body 300, and the output member 3 is adapted to be connected to the wheel 200. One end of the transmission cam 2 is supported on the housing 1 by a second bearing 62, and the other end of the transmission cam 2 is supported on the housing 1 by a third bearing 63. For example, the second bearing 62 and the third bearing 63 are spaced apart in the axial direction of the transmission cam 2, thereby providing better support for the transmission cam 2.

[0123] In some embodiments of this application, reference is made to Figure 2 , Figure 19 As shown, the second bearing 62 and the third bearing 63 are rolling bearings, which reduces the friction between the transmission cam 2 and the housing 1, making the rotation of the transmission cam 2 smoother. For example, the second bearing 62 can be a deep groove ball bearing, a cylindrical roller bearing, etc., and the third bearing 63 can be a deep groove ball bearing, a cylindrical roller bearing, etc.

[0124] In some embodiments of this application, the second bearing 62 includes a second inner ring, a second outer ring, and a second rolling element. The second outer ring is sleeved on the outer periphery of the second inner ring, and the second rolling element is rotatably disposed between the second inner ring and the second outer ring. The second outer ring is fixedly installed on the housing 1, and the second inner ring is installed on the transmission cam 2. When the transmission cam 2 rotates, the second inner ring rotates with the transmission cam 2.

[0125] In some embodiments of this application, the third bearing 63 includes a third inner ring, a third outer ring, and a third rolling element. The third outer ring is sleeved on the outer periphery of the third inner ring, and the third rolling element is rotatably disposed between the third inner ring and the third outer ring. The third outer ring is fixedly installed on the housing 1, and the third inner ring is installed on the transmission cam 2. When the transmission cam 2 rotates, the third inner ring rotates with the transmission cam 2.

[0126] In some embodiments of this application, reference is made to Figure 7 , Figure 19 As shown, the output component 3 has a guide hole 34 extending along the length of the output component 3. The actuator 10 also includes a guide rod 9 connected to the transmission cam 2. The guide rod 9 extends into the guide hole 34 and is guidedly engaged with the guide hole 34. When the output component 3 moves axially along the actuator 10, the guide rod 9 can limit the radial offset of the output component 3.

[0127] In some embodiments not shown in the figures, a linear bearing, such as a ball linear bearing or a roller linear bearing, is provided between the guide rod 9 and the guide hole 34 to reduce the friction between the guide rod 9 and the hole wall of the guide hole 34.

[0128] For example, the guide rod 9 is a cylindrical rod, and the guide hole 34 is a cylindrical hole. In this way, the guide rod 9 and the guide hole 34 are easy to process and easy to manufacture.

[0129] In some embodiments of this application, reference is made to Figure 19 As shown, the guide rod 9 and the transmission cam 2 can be connected by threads, welding, gluing, or other methods to achieve a fixed connection between them.

[0130] In some embodiments of this application, reference is made to Figures 1-2 , Figures 18-19 As shown, the housing 1 includes an outer shell 11 and a lower end cover 12. The lower end cover 12 covers the lower opening of the outer shell 11. The upper end of the transmission cam 2 is supported on the outer shell 11 by a second bearing 62, and the lower end of the transmission cam 2 is supported on the lower end cover 12 by a third bearing 63. This allows the transmission cam 2 to rotate more smoothly within the housing 1.

[0131] In some embodiments of this application, reference is made to Figures 1-2 , Figures 18-19As shown, the upper end of the output component 3 is disposed inside the housing 1, and the lower end of the output component 3 extends downward out of the housing 1. The actuator 10 also includes a lower fork arm 7, which is disposed below the housing 1 and is fixedly connected to the output component 3. Specifically, the upper end of the output component 3 is disposed inside the outer housing 11, and the lower end of the output component 3 extends downward out of the lower end cover 12 and connects to the lower fork arm 7. When the transmission cam 2 rotates, it drives the output component 3 to move along the axis of the transmission cam 2, and the output component 3 drives the lower fork arm 7 to move synchronously, thereby changing the distance between the vehicle body 300 and the wheel 200.

[0132] Reference Figure 2 , Figures 18-19 As shown, the lower end cover 12 is provided with an end cover through hole 121 for the output component 3 to pass through. A bushing 8 is provided in the end cover through hole 121. The outer peripheral surface of the output component 3 can cooperate with the inner peripheral surface of the bushing 8. When the output component 3 moves along the axial direction of the actuator 10, the output component 3 rubs against the bushing 8. When the bushing 8 is severely worn, a new bushing 8 can be replaced.

[0133] In some embodiments, the bushing 8 may be an oil-impregnated bushing, which can reduce the friction between the output component 3 and the bushing 8 and improve the wear phenomenon of the output component 3 and the bushing 8.

[0134] In other embodiments, bushing 8 may also be a regular oil-free bushing.

[0135] Reference Figure 2 , Figure 19 As shown, the follower 42 is fixed to the output member 3 via the first bearing 61. When the transmission cam 2 rotates, the transmission cam 2 is connected to the body 300, and the output member 3 is connected to the wheel 200, the transmission cam 2 cannot move axially. Therefore, only the follower 42 can move axially. Since the follower 42 is fixed to the output member 3, the movement of the follower 42 is also constrained by the movement of the output member 3. Because the output member 3 is connected to the lower fork 7, the lower fork 7 will not rotate. The circumferential revolution tendency of the follower 42 around the axis of the actuator 10 is suppressed. Therefore, the follower 42 only moves axially and rotates, and will not revolve circumferentially. The output member 3 will also only move axially, which will be transmitted as the axial movement of the lower fork 7, thereby changing the vertical distance between the body 300 and the wheel 200 and changing the height of the body 300.

[0136] During the entire movement, the follower 42 continuously rotates, and the storage component 41 fixed to the follower 42 also rotates accordingly. This prevents the lubricating medium in the storage component 41 from simply remaining at the bottom due to gravity; instead, a portion flows into the Tesla valve-type flow channel, i.e., the second flow channel 414. Through the flow restriction of the Tesla valve-type flow channel, a smaller portion of the lubricating medium flows into the first flow channel 425 of the follower 42, and then to the contact surface between the follower 42 and the guide structure 21 of the transmission cam 2 for lubrication. Once a certain amount of lubricating medium accumulates in the guide structure 21 of the transmission cam 2, it naturally flows between the first inner ring 611 and the first outer ring 612 of the first bearing 61 to lubricate the first bearing 61, thereby extending the service life of the first bearing 61.

[0137] The lubrication method of the follower 42 in this application has the advantage over oil pump injection in related technologies in that: the follower 42 itself rotates, driving the storage component 41 to rotate. The lubricating medium inside the storage component 41 will also flow out from the outlet 41415 of the second flow channel 414 of the storage component 41 due to shaking, and flow out through the first flow channel 425 of the follower 42, and be squeezed onto the contact surface between the follower 42 and the guide structure 21. Therefore, no additional oil pump is needed to provide pumping power, and its own motion characteristics will bring lubrication.

[0138] The lubrication method of the follower 42 in this application has the advantage over oil immersion in related technologies in that it does not require a large amount of oil or an oil container. The lubricating medium stored in the oil reservoir 413 of the reservoir 41 itself is sufficient to lubricate the follower 42 and the guide structure 21. When the lubricating medium in the reservoir 41 is used up, a new full oil reservoir 41 can be replaced or lubricating medium can be added to the reservoir 41.

[0139] The biggest advantage of the storage component 41 in this application compared to the traditional storage box is that the second flow channel 414 adopts a flow channel with the characteristics of a Tesla valve. By utilizing its unidirectional flow, it can greatly hinder the flow of lubricating medium from the storage component 41, but it will not completely prevent the flow. Therefore, it can achieve a slow and continuous flow of lubrication and extend the service life.

[0140] In some embodiments of this application, reference is made to Figure 2 , Figures 5-8 , Figure 19 As shown, the output component 3 includes an output component body 31 and multiple support arms 32, all of which are connected to the output component body 31. Each support arm 32 is equipped with a follower 4. This distributes the contact stress between the follower 4 and the transmission cam 2, reducing wear on both and extending their service life. Figure 2 , Figures 5-8In the example, there are two support arms 32, which are symmetrically distributed on both sides of the axis of the output component body 31, making the output component 31 as a whole "Y" shape. The two support arms 32 pass through the circular holes on the side, namely the first mounting holes 33.

[0141] In some embodiments not shown in the figures, the number of guide structures 21 may be one.

[0142] In some embodiments of this application, there are multiple guide structures 21, which satisfy N-fold symmetry. There are also multiple follower members 42, with one follower member 42 located within one guide structure 21. N ≥ 2 and is an integer.

[0143] Specifically, one of the multiple guide structures 21 can coincide with another of the multiple guide structures 21 after rotating around the axis of the transmission cam 2 by a preset angle α. The preset angle α satisfies: α=n1 / n2*360°, where n1 is a positive integer and less than the number of guide structures 21, and n2 is the number of guide structures 21.

[0144] Therefore, by setting multiple guide structures 21, during the relative movement of the transmission cam 2 and the output component 3, multiple guide structures 21 can guide and limit the follower 42, thereby improving the stability of the relative movement of the transmission cam 2 and the output component 3.

[0145] In some embodiments, such as Figure 2 , Figure 19 , Figure 20 As shown, the guide structure 21 extends spirally along the axial direction of the transmission cam 2. Since the follower 42 is connected to the guide structure 21, when one of the transmission cam 2 and the output component 3 rotates, the inner wall surface of the guide structure 21 can abut against the follower 42 and exert a thrust on each other. This causes the transmission cam 2 and the output component 3 to move axially relative to each other when one of them rotates, thus realizing the conversion function from rotational motion to axial motion.

[0146] For example, the number of guide structures 21 can be two, three, four, five or more. The following example uses two guide structures 21; other cases will not be described in detail.

[0147] like Figure 20 As shown, the guide structure 21 includes a first guide structure 213 and a second guide structure 214. The first guide structure 213 and the second guide structure 214 are located on opposite sides of the axis of the transmission cam 2. The follower 42 includes a first follower and a second follower. The first follower is located on the first guide structure 213 and the second follower is located on the second guide structure 214. Thus, the first follower and the second follower are also located on opposite sides of the axis of the transmission cam 2.

[0148] The first guide structure 213 can apply a thrust to the first follower, and the second guide structure 214 can apply a thrust to the second follower. Since the first guide structure 213 and the second guide structure 214 are arranged opposite to each other, and the first follower and the second follower are arranged opposite to each other, the transmission cam 2 and the output member 3 can be subjected to relatively balanced forces in the radial direction, so as to avoid the output member 3 tilting relative to the axis of the transmission cam 2 (or the transmission cam 2 tilting relative to the axis of the output member 3), and ensure that one of the output member 3 and the transmission cam 2 can move normally in the axial direction when rotating.

[0149] By employing a follower 42 in conjunction with a transmission cam 2, bidirectional active control can be achieved, unlike the unidirectional control of traditional transmission cams paired with flat or roller followers. Furthermore, the manufacturing technology for these parts is mature and inexpensive.

[0150] Compared to ball screws which require multiple balls to work together, the follower 42 of this application has significantly lower requirements for machining accuracy. It does not need to be as small and precise as the balls in a ball screw. Since the follower 42 is much larger than the balls, the machining accuracy requirements can be appropriately relaxed, and the assembly difficulty is greatly reduced.

[0151] Compared to the traditional transmission cam 2 paired with a flat plate or roller follower, the actuator 10 of this application can use multiple follower elements 42 simultaneously to share the contact stress with the transmission cam 2, reduce the wear of the follower element 4 and the transmission cam 2, and extend the service life.

[0152] In some embodiments of this application, the transmission cam 2 is a cylindrical transmission cam 2, and the axis of the cylindrical transmission cam 2 is aligned with the axis of the actuator 10.

[0153] In some embodiments of this application, the follower 42 is cylindrical.

[0154] In some other embodiments of this application, the follower 42 may also be a square slider, a shuttle-shaped body, a cone-shaped body, etc., for the purpose of rolling or sliding along the guide structure 21 groove of the transmission cam 2.

[0155] The suspension system according to a second aspect of this application includes the actuator 10 described above. The actuator 10 can achieve an active vibration damping effect.

[0156] The suspension assembly 100 also includes a strut top 20 adapted to connect to the vehicle body 300, and one of the drive cam 2 and the actuator assembly is adapted to connect to the vehicle body 300 via the strut top 20. Specifically, one of the drive cam 2 and the output member 3 is adapted to connect to the vehicle body 300 via the strut top 20.

[0157] In some embodiments of this application, the housing 1 is adapted to be connected to the vehicle body 300 via a tower top 20.

[0158] In some embodiments of this application, reference is made to Figures 1-2 , Figure 19 As shown, the housing 1 includes an outer shell 11 and a lower end cover 12. The lower end cover 12 covers the lower opening of the outer shell 11. The upper end of the outer shell 11 is connected to the tower top 20. The drive unit 5 is installed above the tower top 20.

[0159] According to the suspension system of the present application embodiment, the actuator 10 provides an oil reservoir 413 in the actuator component and uses the lubricating medium in the oil reservoir 413 for lubrication between the actuator component and the guide structure 21. This helps to reduce the friction between the actuator component and the transmission cam 2, solve the problem of severe wear between the actuator component and the transmission cam 2, and thus solve the problem of severe wear between relatively moving parts.

[0160] The vehicle 1000 according to another aspect of this application includes the suspension assembly 100 of the above embodiment.

[0161] Figure 21 This is a schematic diagram of the structure of a vehicle 1000 provided in an embodiment of this application. The vehicle 1000 may include wheels 200 and a body 300. The wheels 200 are connected to the underside of the body 300. During the movement of the vehicle 1000, the wheels 200 rotate to drive the body 300 to move. The suspension assembly 100 is connected between the body 300 and the wheels 200 to buffer the impact force transmitted to the body 300 from uneven road surfaces, thereby ensuring the smoothness of the vehicle 1000's ride and improving the driving comfort of the vehicle 1000.

[0162] According to the embodiments of the present application, the actuator 10 of the suspension assembly 100 provides an oil reservoir 413 in the actuator assembly and uses the lubricating medium in the oil reservoir 413 for lubrication between the actuator assembly and the guide structure 21. This helps to reduce the friction between the actuator assembly and the transmission cam 2, solve the problem of severe wear between the actuator assembly and the transmission cam 2, and thus solve the problem of severe wear between relatively moving parts.

[0163] Optionally, vehicle 1000 can be a pure electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, a range-extended electric vehicle, or a gasoline-powered vehicle. Vehicle 1000 can also be a sedan, truck, bus, lorry, trailer, etc. This application does not specifically limit the type of vehicle 1000.

[0164] In the description of this application, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0165] In this application, unless otherwise expressly 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 connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0166] 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 this application. 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. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0167] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An actuator (10), characterized in that, include: A transmission cam (2) is provided with a guide structure (21); The actuator, in cooperation with the guide structure (21), drives the actuator to move along the axial direction of the transmission cam (2) when the transmission cam (2) moves. The actuator is provided with an oil reservoir (413) for storing a lubricating medium for lubrication between the actuator and the guide structure (21).

2. The actuator (10) according to claim 1, characterized in that, The execution component includes: Follower (4), which cooperates with the guide structure (21) for transmission; Output component (3), the follower (4) is connected to the output component (3), the output component (3) is connected to the transmission cam (2) through the follower (4), when one of the transmission cam (2) and the output component (3) rotates, the transmission cam (2) and the output component (3) can move relative to each other along the axial direction of the transmission cam (2); One of the transmission cam (2) and the output member (3) is adapted to be connected to the vehicle body (300), and the other is adapted to be connected to the wheel (200).

3. The actuator (10) according to claim 2, characterized in that, The oil reservoir (413) is formed in the follower (4). When the transmission cam (2) rotates relative to the output member (3), the lubricating medium in the oil reservoir (413) is delivered to the gap between the guide structure (21) and the follower (4).

4. The actuator (10) according to claim 3, characterized in that, The follower (4) includes: Storage component (41), wherein the oil storage cavity (413) is formed within the storage component (41); Follower (42), the storage member (41) is mounted on the follower (42), the follower (42) is rotatably connected to the output member (3), at least a portion of the follower (42) is accommodated in the guide structure (21), the follower (42) has a first flow channel (425) that connects the oil storage chamber (413) and the guide structure (21).

5. The actuator (10) according to claim 4, characterized in that, The actuator (10) further includes a first bearing (61), the output member (3) has a first mounting hole (33), and the follower (42) is rotatably mounted in the first mounting hole (33) via the first bearing (61).

6. The actuator (10) according to claim 5, characterized in that, The first bearing (61) includes: The first inner ring (611) is mounted on the follower (42) and can rotate with the follower (42); The first outer ring (612) is sleeved on the outer periphery of the first inner ring (611) and is fixedly installed in the first mounting hole (33). A first rolling element (613) is disposed between the first inner ring (611) and the first outer ring (612). At least one of the first inner ring (611) and the first outer ring (612) is provided with a raceway groove, and the first rolling element (613) is rotatably mounted in the raceway groove.

7. The actuator (10) according to claim 6, characterized in that, The first rolling element (613) is a needle roller.

8. The actuator (10) according to claim 6, characterized in that, The follower (42) includes a first rod portion (421), a second rod portion (422), and a flange portion (423). The flange portion (423) connects the first rod portion (421) and the second rod portion (422). At least a portion of the first rod portion (421) is accommodated in the guide structure (21). The first inner ring (611) is mounted on the second rod portion (422). The first inner ring (611) abuts against the side of the flange portion (423) opposite to the guide structure (21).

9. The actuator (10) according to claim 4, characterized in that, The follower (42) has a limiting and fixing groove (424), and the storage member (41) includes: The body part (411) has the oil storage cavity (413) formed within it; A limiting and fixing part (412) is connected to the main body part (411). The limiting and fixing part (412) extends into the limiting and fixing groove (424) and is fixed in the limiting and fixing groove (424). A second flow channel (414) is formed in the limiting and fixing part (412). The second flow channel (414) connects the oil storage cavity (413) and the first flow channel (425).

10. The actuator (10) according to claim 9, characterized in that, The limiting and fixing groove (424) includes a limiting groove (4241) and a fixing groove (4242). The limiting groove (4241) is located on the side of the fixing groove (4242) opposite to the guide structure (21). The limiting and fixing part (412) includes: A limiting boss (4121) is connected to the main body (411) and extends into the limiting groove (4241). A fixing part (4122) is located on the side of the limiting boss (4121) facing the guide structure (21), and the fixing part (4122) is fixed to the fixing groove (4242); The limiting groove (4241) and the fixing groove (4242) are connected by a limiting wall (4243), which is used to limit the extreme position of the limiting boss (4121) extending into the limiting groove (4241).

11. The actuator (10) according to claim 9, characterized in that, The main body (411) is a rubber sleeve.

12. The actuator (10) according to claim 9, characterized in that, The second flow channel (414) includes a plurality of Tesla valve units (4141), which are connected to each other. Each Tesla valve unit (4141) includes: an inclined channel (41411), an arc channel (41412), and a straight channel (41413). The inclined channel (41411) is located on the side of the arc channel (41412) near the oil storage chamber (413), and the straight channel (41413) is located on the side of the arc channel (41412) near the first flow channel (425).

13. The actuator (10) according to claim 12, characterized in that, The oblique channel (41411) is connected to the straight channel (41413) with an angle of θ1 between them. One end of the arc channel (41412) is connected to and tangent to the end of the oblique channel (41411). The other end of the arc channel (41412) is connected to the straight channel (41413). The angle between the tangent at the other end of the arc channel (41412) and the straight channel (41413) is θ2, where θ2 < θ1 < 90°.

14. The actuator (10) according to claim 2, characterized in that, The actuator (10) further includes a drive member (5) connected to one of the transmission cam (2) and the output member (3) to drive one of the transmission cam (2) and the output member (3) to rotate.

15. The actuator (10) according to claim 14, characterized in that, The drive member (5) is used to drive the transmission cam (2) to rotate. The transmission cam (2) is adapted to be connected to the vehicle body (300). The output member (3) is adapted to be connected to the wheel (200). The actuator (10) also includes a housing (1), one end of the transmission cam (2) is supported on the housing (1) by a second bearing (62), and the other end of the transmission cam (2) is supported on the housing (1) by a third bearing (63).

16. The actuator (10) according to claim 15, characterized in that, The output component (3) has a guide hole (34) that extends along the length of the output component (3). The actuator (10) also includes a guide rod (9) that is connected to the transmission cam (2). The guide rod (9) extends into the guide hole (34) and guides and cooperates with the guide hole (34).

17. The actuator (10) according to claim 15, characterized in that, The housing (1) includes an outer shell (11) and a lower end cover (12). The lower end cover (12) covers the lower opening of the outer shell (11). The upper end of the transmission cam (2) is supported on the outer shell (11) by the second bearing (62), and the lower end of the transmission cam (2) is supported on the lower end cover (12) by the third bearing (63).

18. The actuator (10) according to any one of claims 15-17, characterized in that, The upper end of the output component (3) is disposed inside the housing (1), and the lower end of the output component (3) extends downward out of the housing (1). The actuator (10) also includes a lower fork arm (7), which is disposed below the housing (1) and fixedly connected to the output component (3).

19. The actuator (10) according to any one of claims 2-17, characterized in that, The output component (3) includes an output component body (31) and a plurality of support arms (32) connected to the output component body (31), and each support arm (32) is provided with a follower (4).

20. A suspension assembly (100), characterized in that, Includes the actuator (10) as described in any one of claims 1-19.

21. The suspension assembly (100) according to claim 20, characterized in that, The suspension assembly (100) further includes a tower top (20) adapted to connect to the vehicle body (300), and one of the drive cam (2) and the actuator assembly is adapted to connect to the vehicle body (300) via the tower top (20).

22. A vehicle (1000), characterized in that, Includes the suspension assembly (100) according to any one of claims 20-21.

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