WO2025227693A1 - Actuator, suspension assembly and vehicle - Google Patents

Abstract

An actuator (100), a suspension assembly and a vehicle. The actuator (100) comprises: a driving device (10); a transmission device (20); an output member (30), wherein the driving device (10) is connected to the output member (30) by means of the transmission device (20); and a linear motion component (40), wherein the output member (30) cooperates with the linear motion component (40) to drive the linear motion component (40) to move linearly, and the transmission device (20) and the driving device (10) are arranged on both sides of the linear motion component (40), respectively.

Description

Actuators, suspension assembly and vehicle

Cross-references to related applications

This application is based on and claims priority to Chinese Patent Application No. 202420921697.5, filed on April 29, 2024, the entire contents of which are incorporated herein by reference.

Technical Field

This application relates to the field of automotive technology, and in particular to an actuator, suspension assembly, and vehicle.

Background Technology

The actuator can actively adjust the gap between the vehicle body and the wheels to make the vehicle more stable during driving. The actuator will shake along with the vehicle during driving and is subjected to a large impact force from the wheels and the vehicle body. In related technologies, unreasonable actuator design can easily cause stress to concentrate on some components during the operation of the actuator, which increases the probability of actuator damage.

Application content

This application aims to at least partially address one of the aforementioned technical problems in the prior art.

In view of this, this application needs to provide an actuator with higher reliability.

This application also provides a suspension assembly having the above-described actuator.

This application also provides a vehicle having the above-described suspension assembly.

According to the actuator provided in this application, the actuator is connected between the vehicle body and the wheel, and the actuator includes: a drive device; a transmission device; an output component, wherein the drive device is connected to the output component through the transmission device; and a linear motion component, wherein the output component cooperates with the linear motion component to drive the linear motion component to move linearly, wherein the transmission device and the drive device are respectively disposed on both sides of the linear motion component.

According to the embodiments of this application, the actuator can achieve active vibration reduction of the vehicle. By placing the transmission device and the drive device on both sides of the linear motion component, the symmetry of the component distribution on the actuator can be improved, thereby making the stress distribution on the actuator more uniform and reducing the probability of damage during the operation of the actuator.

In addition, the actuator according to the above embodiments of this application may also have the following additional technical features:

According to some embodiments of this application, the output component is an output gear, the linear motion component is a rack, and the output gear meshes with the rack to drive the rack to move linearly.

According to some embodiments of this application, the output gear is a helical gear, and the rack is provided with a plurality of helical teeth adapted to the output gear.

According to some embodiments of this application, the speed change device includes: a first gear and a first shaft, the first shaft extending along the width direction of the linear motion component and extending to both sides of the linear motion component respectively, one end of the first shaft being connected to the drive device, and the first gear being fixed to the other end of the first shaft; a second gear and a second shaft, the second gear meshing with the first gear, the diameter of the second gear being larger than the diameter of the first gear, the second shaft extending along the width direction of the linear motion component, and the second gear and the output component being sleeved and fixed on the second shaft.

According to some embodiments of this application, both the first gear and the second gear are helical gears.

According to some embodiments of this application, the actuator further includes: a guide member having a guide groove, and the linear motion component being movably disposed in the guide groove.

According to some embodiments of this application, the actuator further includes: a housing, a mounting cavity defined within the housing, a transmission device disposed within the mounting cavity, a linear motion component disposed within the mounting cavity, and the lower end of the linear motion component extending out of the mounting cavity for connecting a wheel.

According to some embodiments of this application, the drive device is fixed to the housing.

According to some embodiments of this application, the housing includes: a first housing, one side of which is open; and a second housing, which is separately disposed from the first housing, the second housing covering the open side of the first housing and cooperating with the first housing to define the mounting cavity.

According to some embodiments of this application, the mating surfaces of the first shell and the second shell are parallel to the output shaft of the drive device, or the mating surfaces of the first shell and the second shell are perpendicular to the output shaft of the drive device.

According to some embodiments of this application, the housing is provided with a mounting plate, and a through hole is formed on the mounting plate along the thickness direction. The through hole communicates with the mounting cavity. The driving device is fixed on the mounting plate. The driving device has a rotor and an output shaft sleeve connected to the rotor. The output shaft sleeve passes through the through hole and is connected to the speed change device for transmission.

According to some embodiments of this application, the mounting plate has a flange around its periphery, the flange cooperates with the mounting plate to define a positioning groove, and one end of the driving device extends into the positioning groove.

According to some embodiments of this application, it further includes: a wheel connector, wherein the linear motion component is adapted to be connected to the wheel via the wheel connector.

The suspension assembly provided according to this application includes: the actuator provided according to this application as described above.

The suspension assembly according to the embodiments of this application can improve the reliability of the suspension assembly during operation by providing the actuators provided in this application.

The vehicle provided according to this application includes: the suspension assembly provided according to this application as described above.

The vehicle according to the embodiments of this application can improve the reliability of the vehicle during operation by setting the suspension assembly provided by this application.

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

Figure 1 is a schematic diagram of an actuator according to an embodiment of this application;

Figure 2 is a schematic diagram of the actuator shown in Figure 1 from another angle;

Figure 3 is a schematic diagram of the actuator shown in Figure 1 from another angle;

Figure 4 is a cross-sectional view of the actuator shown in Figure 3;

Figure 5 is a schematic diagram of the speed change device, linear motion component, first shaft and second shaft shown in Figure 4;

Figure 6 is a schematic diagram of a guide member according to an embodiment of this application;

Figure 7 is a schematic diagram of the first guide member and the housing according to an embodiment of this application;

Figure 8 is a schematic diagram of the second guide and mounting base according to an embodiment of this application.

Figure label:

100. Actuator;

10. Drive unit; 11. Output shaft sleeve; 12. Coupling;

20. Gearbox; 21. First gear; 22. Second gear;

30. Output components;

40. Linear motion components;

50. First shaft; 51. First support bearing; 52. Second support bearing;

60. Second shaft; 61. Third support bearing; 62. Fourth support bearing;

70. Housing; 71. Mounting cavity; 711. Mounting base; 7111. Limiting protrusion; 72. First housing; 73. Second housing; 74. Mounting plate; 741. Communicating hole; 742. Flanged edge;

80. Wheel connectors;

90. Guide component; 91. Wear-resistant layer; 92. Friction-reducing layer; 93. Bearing layer; 94. Oil reservoir hole; 95. First guide component; 951. First retaining ring; 952. First fixing hole; 96. Second guide component; 961. Fourth fixing hole.

Detailed Implementation

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.

The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and/or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application; however, those skilled in the art will recognize the applicability of other processes and/or the use of other materials.

The actuator 100 according to the first aspect of this application is described in detail below with reference to Figures 1-7.

As shown in Figures 1 and 5, the actuator 100 according to the first aspect of the present application includes: a drive device 10, a speed change device 20, an output member 30, and a linear motion member 40.

Specifically, the drive device 10 is connected to the output component 30 through the speed change device 20; the linear motion component 40, the output component 30 cooperates with the linear motion component 40 to drive the linear motion component 40 to move linearly, wherein the speed change device 20 and the drive device 10 are respectively located on both sides of the linear motion component 40.

For example, the drive unit 10 is connected to the output unit 30 through the speed change device 20, the linear motion component 40 extends along the actuation direction, and the output unit 30 cooperates with the linear motion component 40 to drive the linear motion component 40 to move linearly. The speed change device 20 and the drive unit 10 are respectively located on both sides of the linear motion component 40 in the width direction.

The linear motion component 40 is a rack extending along the actuation direction of the actuator 100, meaning the actuation direction of the actuator 100 is the length direction of the rack, and the direction perpendicular to the actuation direction is the width direction of the rack. In the width direction of the rack, there is a side closer to the drive device 10 and a side farther from the drive device 10. The transmission device 20 and the drive device 10 are located on the same side of the linear motion component 40, which can be understood as the transmission device 20 being arranged on the side of the linear motion component 40 closer to the drive device 10; the transmission device 20 and the drive device 10 are located on opposite sides of the linear motion component 40, which can be understood as the transmission device 20 being arranged on the side of the linear motion component 40 farther from the drive device 10.

The actuator 100 is connected between the vehicle body and the wheels. When the vehicle body posture needs to be adjusted during vehicle operation, the drive unit 10 drives the linear motion component 40 to move linearly through the transmission device 20 and the output component 30. The linear motion component 40 pushes the wheels and the vehicle body to move relative to each other in the vertical direction, adjusting the distance between the wheels and the vehicle body, thereby adjusting the posture of the vehicle body, that is, realizing the active vibration reduction of the vehicle.

Preferably, the drive device 10 is a drive motor. The drive motor has a faster response, which can improve the response speed of the actuator 100, thereby reducing the time required for vehicle posture adjustment and improving the driving experience of the occupants.

The transmission device 20 can reduce the speed and increase the torque of the drive device 10. When the output torque of the output device 30 meets the usage requirements, the power of the drive device 10 can be reduced. It can be understood that the smaller the power of the drive device 10, the smaller the size of the drive device 10. In this way, the size of the drive device 10 in the actuator 100 can be reduced, which makes it easier to arrange the actuator 100 on the vehicle.

In the actuator 100, the drive device 10 and the transmission device 20 account for a large proportion of the weight, and the force on the drive device 10 and the transmission device 20 is large during the operation of the actuator 100. By setting the transmission device 20 and the drive device 10 on both sides of the linear motion component 40 in the width direction, the symmetry of the transmission device 20 and the drive device 10 is higher. As a result, the uniformity of stress distribution on the actuator 100 can be improved during the operation of the actuator 100 in the vehicle, thereby reducing the probability of damage to the actuator 100 during operation.

According to the first aspect of the present application, the actuator 100 can achieve active vibration reduction of the vehicle. By distributing the transmission device 20 and the drive device 10 on both sides of the linear motion component 40 in the width direction, the symmetry of the component distribution on the actuator 100 can be improved, thereby making the stress distribution on the actuator 100 more uniform and reducing the probability of damage to the actuator 100 during operation.

In some embodiments of this application, the output component 30 is an output gear, and the linear motion component 40 is a rack. The output gear meshes with the rack to drive the rack to move linearly. That is, the drive device 10 is a component that can drive the output gear to rotate. For example, the drive device 10 can be a drive motor. The output gear and rack have direct transmission, which can further improve the response speed of the actuator 100, reduce the time required for vehicle body posture adjustment, and improve the driving experience for occupants. In addition, the output gear and rack have simple structures and are easy to manufacture during production.

In some embodiments of this application, the output gear is a helical gear, and the rack has multiple helical teeth adapted to the output gear. The helical gear meshing transmission is smoother, and the helix angle of the helical gear is smaller, which can reduce the axial force on the output gear at the meshing point of the output gear and the rack. As a result, noise during vehicle operation can be reduced, and the service life of the output gear and the rack can be increased.

In some embodiments of this application, as shown in Figures 4 and 5, the speed change device 20 includes: a first gear 21, a first shaft 50, a second gear 22, and a second shaft 60. The first shaft 50 extends along the width direction of the linear motion component 40, with both ends extending to opposite sides of the linear motion component 40. One end of the first shaft 50 is connected to the drive device 10. The first gear 21 is fixed to the other end of the first shaft 50. The second gear 22 meshes with the first gear 21, and the diameter of the second gear 22 is larger than the diameter of the first gear 21. The second shaft 60 extends along the width direction of the linear motion component 40, and the second gear 22 and the output component 30 are both sleeved and fixed on the second shaft 60. Thus, the speed change device 20 can achieve speed reduction transmission. During product design, the dimensions of the first gear 21 and the second gear 22 can be adjusted, thereby allowing the speed change device 20 to meet more product design needs and reducing product design difficulty. In addition, the gravity distribution of the first shaft 50 and the second shaft 60 is relatively uniform on the actuator 100, which can further improve the uniformity of stress distribution on the actuator 100.

In some embodiments of this application, both the first gear 21 and the second gear 22 are helical gears. Helical gear meshing transmission is smoother, and the helix angle of the helical gear is smaller, which can reduce the force on the first gear 21 in the axial direction at the meshing point of the first gear 21 and the second gear 22. As a result, noise during vehicle operation can be reduced, and the service life of the output gear and rack can be increased.

In some embodiments of this application, as shown in Figures 6-8, the actuator 100 further includes a guide member 90, which has a guide groove, and the linear motion component 40 is movably disposed in the guide groove. For example, the guide groove extends vertically, and the linear motion component 40 is movably disposed in the guide groove in the vertical direction. By providing the guide member 90, the guide groove on the guide member 90 can constrain the movement path of the linear motion component 40, thereby improving the reliability of the actuator 100 during operation, and further improving the reliability of the vehicle during operation.

In some embodiments of this application, as shown in Figures 1-4, the actuator 100 further includes: a housing 70, which defines a mounting cavity 71; a transmission device 20 is disposed in the mounting cavity 71; and a linear motion component 40 is disposed in the mounting cavity 71, with the lower end of the linear motion component 40 extending out of the mounting cavity 71 for connecting a wheel, i.e., the housing 70 is connected to the vehicle body. Preferably, the linear motion component 40 is a rack. It is understood that racks are smaller in size, making it easier to connect the rack to the wheel during product design and assembly.

In some embodiments of this application, as shown in Figures 6-8, the output component 30 is an output gear, the linear motion component 40 is a rack, and the inner wall of the guide groove is formed as a circular arc cylindrical surface. During the operation of the actuator 100, the output gear and the inner wall of the guide groove restrict the horizontal movement of the rack on both sides of the rack's thickness direction. Thus, driven by the output gear, the rack can perform linear motion, thereby applying a force to adjust the distance between the vehicle body and the wheels, achieving the vehicle's active vibration damping function.

Understandably, during vehicle operation, the rack will sway with the vehicle body, and when the vehicle body tilts, the body or wheels may cause the rack to displace horizontally. During the linear motion of the rack driven by the output gear, the rack may also experience horizontal displacement. For example, when the output gear and rack are engaged by helical teeth, the output gear will exert a horizontal force on the rack, causing it to displace horizontally.

In this embodiment, by setting the inner wall surface of the guide groove as a circular arc cylindrical surface, the guide groove has an opening. During the movement of the rack, the opening provides clearance for the toothed side of the rack, thereby preventing the teeth on the rack from striking or rubbing against the inner wall surface of the guide groove, thus improving the service life of the rack. Simultaneously, when the rack undergoes relative displacement with the inner wall surface of the guide groove in the horizontal direction, the circular arc cylindrical surface allows the rack to slide more smoothly within the guide groove, reducing wear on the inner wall surface of the guide groove on the mating surface of the rack, further improving the service life of the rack.

In some embodiments of this application, the central angle corresponding to the arc-shaped cylindrical surface is not less than 20°; and/or, the central angle corresponding to the arc-shaped cylindrical surface is not greater than 180°.

In other words, the central angle corresponding to the arc cylinder can be no less than 20°. For example, the central angle corresponding to the arc cylinder can be 20°, 30° or 45°.

Alternatively, the central angle corresponding to the arc cylinder can be no greater than 180°. For example, the central angle corresponding to the arc cylinder can be 120°, 150°, or 180°.

Alternatively, the central angle corresponding to the arc cylinder can be no less than 20° and no more than 180°. For example, the central angle corresponding to the arc cylinder can be 20°, 30°, 45°, 90°, 120°, 150° or 180°.

Therefore, it can be ensured that the linear motion component 40 will not dislodge from the guide groove within its normal movement path, and when the linear motion component 40 is a rack, the teeth of the rack will not contact the inner wall of the guide groove. During product design, the central angle corresponding to the arc-shaped cylindrical surface can be adjusted to meet more product design needs and reduce product design difficulty.

In some embodiments of this application, as shown in FIG6, the guide member 90 is an arc-shaped plate structure extending along an arc line, and the radial inner surface of the guide member 90 encloses a guide groove. Therefore, the structure of the guide member 90 is relatively simple, which reduces the manufacturing difficulty of the guide member 90 and the assembly difficulty of the guide member 90 on the actuator 100, thereby reducing production costs.

In some embodiments of this application, as shown in FIG6, the guide member 90 includes: a wear-resistant layer 91, a wear-reducing layer 92, and a bearing layer 93. The wear-resistant layer 91, the wear-reducing layer 92, and the bearing layer 93 are arranged sequentially from the inside to the outside along the radial direction of the guide groove. The hardness of the wear-reducing layer 92 is less than that of the bearing layer 93. During the operation of the actuator 100, the linear motion component 40 will rub against the inner wall of the guide groove. By providing the wear-resistant layer 91, the wear of the linear motion component 40 on the inner wall of the guide groove can be reduced, thereby improving the service life of the guide component 90. By providing the friction-reducing layer 92, which has a lower hardness, when the force on the wear-resistant layer 91 is transmitted to the friction-reducing layer 92, the wear of the friction-reducing layer 92 on the wear-resistant layer 91 can be reduced, thereby further improving the service life of the guide component 90. By providing the bearing layer 93, which has higher hardness and strength, after the guide component 90 is installed, a greater force can be applied at the connection between the guide component 90 and the actuator 100, thereby making the connection between the guide component 90 and the actuator 100 more reliable.

In some embodiments of this application, the wear-reducing layer 92 is a copper powder layer, and/or the bearing layer 93 is a steel plate layer. The copper powder layer has a low hardness, which satisfies the requirement of the wear-reducing layer 92 to reduce wear on the wear-resistant layer 91, while the steel plate layer has high hardness and strength, which satisfies the connection strength requirements of the guide member 90 on the actuator 100.

In some embodiments of this application, as shown in FIG6, at least one oil reservoir 94 is formed on the inner wall of the guide groove. For example, there may be one, two, or ten oil reservoirs 94. It is understood that during the operation of the actuator 100, lubricating oil is required at the transmission connection for lubrication and cooling. By providing oil reservoirs 94, lubricating oil can be contained in the oil reservoirs 94. In this way, when the linear motion component 40 moves at the oil reservoir 94, the lubricating oil can adhere to the linear motion component 40, thereby improving the lubrication and cooling effect on the linear motion component 40 and the output component 30.

In some embodiments of this application, there are two guide members 90, namely a first guide member 95 and a second guide member 96, which are arranged vertically at intervals. The first guide member 95 has a first guide groove, and the second guide member 96 has a second guide groove. The rack engages in the first guide groove and the second guide groove. Thus, during the movement of the rack, both the first guide groove and the second guide groove can constrain the movement path of the rack, thereby further improving the reliability of the actuator 100 during operation, and further improving the reliability of the vehicle during operation.

In some embodiments of this application, as shown in FIG7, the inner wall of the mounting cavity 71 is formed with a first positioning groove and a first fixing groove. The first fixing groove is located below the first positioning groove and communicates with the first positioning groove. A first retaining spring 951 is fixed in the first fixing groove, and a first guide member 95 is fitted in the first positioning groove, with the first retaining spring 951 abutting against the first guide member 95. By setting the first positioning groove, the first guide member 95 can be quickly positioned during the assembly process, thereby improving assembly efficiency and assembly accuracy. In addition, the inner wall of the first positioning groove can restrict the displacement of the first guide member 95, thereby improving the reliability and stability of the first guide member 95 after installation in the mounting cavity 71. By setting the first retaining spring 951, the first retaining spring 951 can apply a force to the first guide member 95, so that the first guide member 95 can be fixed in the first positioning groove. By setting the first fixing groove, the first retaining spring 951 can be quickly positioned during the assembly process, and the operation of assembling the first retaining spring 951 into the first fixing groove is relatively simple, thereby improving assembly efficiency and assembly accuracy.

In some embodiments of this application, as shown in FIG7, a first fixing hole 952 is formed on the first guide member 95, and a second fixing hole is formed on the inner wall of the mounting cavity 71. The first guide member 95 is fixed to the housing 70 by fasteners passing through the first fixing hole 952 and the second fixing hole. The fastener connection has high reliability and is easy to operate, thereby improving the reliability of the connection between the first guide member 95 and the inner wall of the mounting cavity 71 and increasing production efficiency. In addition, a detachable connection between the first guide member 95 and the inner wall of the mounting cavity 71 can be achieved. It is understood that the friction between the rack and the first guide member 95 will cause the first guide member 95 to wear. Thus, when the first guide member 95 is excessively worn, it is easy to replace the first guide member 95.

In some embodiments of this application, as shown in FIG8, the actuator 100 further includes: a mounting base 711, which is fixed to the inner wall of the mounting cavity 71. A second positioning groove is formed on the mounting base 711. A limiting protrusion 7111 is provided at the upper end of the second positioning groove, and a second fixing groove is formed at the lower end of the second positioning groove. The second fixing groove communicates with the second positioning groove. A second retaining spring is disposed in the second fixing groove. A second guide member 96 is disposed in the second positioning groove. The upper end of the second guide member 96 abuts against the limiting protrusion 7111, and the lower end of the second guide member 96 abuts against the retaining spring. During the product design process, parameters such as the distance between the mounting surface of the second guide member 96 on the mounting base 711 and the inner wall of the mounting cavity 71, or the shape of the mounting surface of the second guide member 96, can be adjusted so that the first guide member 95 and the second guide member 96 can meet more product design needs.

By providing a second positioning groove, the second guide member 96 can be quickly positioned during assembly, thereby improving assembly efficiency and accuracy. Furthermore, the inner wall of the second positioning groove restricts the displacement of the second guide member 96, enhancing its reliability and stability after installation in the mounting cavity 71. By providing a second retaining spring and a limiting protrusion 7111, the second retaining spring applies a force to the second guide member 96, and the limiting protrusion 7111 restricts its upward displacement, thus fixing the second guide member 96 in the second positioning groove. The second fixing groove allows for rapid positioning of the second retaining spring during assembly, and the assembly of the second retaining spring into the second fixing groove is relatively simple, further improving assembly efficiency and accuracy.

In some embodiments of this application, as shown in FIG8, a third fixing hole is formed on the mounting base 711, and a fourth fixing hole 961 is formed on the second guide member 96. Fasteners pass through the third fixing hole and the fourth fixing hole 961 to fix the second guide member 96 to the mounting base 711. The fastener connection has high reliability and is easy to operate, thereby improving the reliability of the connection between the second guide member 96 and the mounting base 711 and increasing production efficiency. Furthermore, a detachable connection between the second guide member 96 and the mounting base 711 can be achieved. It is understood that friction between the rack and the second guide member 96 will cause wear on the second guide member 96. Therefore, when the second guide member 96 is excessively worn, it is easy to replace it.

In some embodiments of this application, as shown in Figures 3 and 4, the drive unit 10 is fixed to the housing 70. The housing 70 is fixed to the vehicle body, and the first shaft 50 and the second shaft 60 are supported on the housing 70. The drive unit 10 is bolted to the housing 70. By providing the housing 70, the housing 70 can protect components such as the transmission device 20 and the linear motion component 40, reducing the probability of these components being affected by external environmental interference and damage. Furthermore, the housing 70 can improve the integration of the actuator 100 and reduce the difficulty of assembly and product design.

In some embodiments of this application, as shown in Figures 4 and 5, the actuator 100 further includes: a first support bearing 51, a second support bearing 52, a third support bearing 61, and a fourth support bearing 62. The two ends of the first shaft 50 are supported on the housing 70 by the first support bearing 51 and the second support bearing 52, and the two ends of the second shaft 60 are supported on the housing 70 by the third support bearing 61 and the fourth support bearing 62. Thus, the first shaft 50 and the second shaft 60 can be rotatably connected to the housing 70.

In some embodiments of this application, as shown in Figures 1 and 2, the housing 70 includes a first housing 72 and a second housing 73 that are separately disposed, wherein one side of the first housing 72 is open, the second housing 73 covers the open side of the first housing 72 and cooperates with the first housing 72 to define a mounting cavity 71, the first housing 72 and the second housing 73 are connected radially to the output shaft of the drive device 10, or the first housing 72 and the second housing 73 are connected axially to the output shaft of the drive device 10.

Preferably, the mating surfaces of the first housing 72 and the second housing 73 are parallel to the output shaft of the drive device 10, or the mating surfaces of the first housing 72 and the second housing 73 are perpendicular to the output shaft of the drive device 10. This simplifies the positioning and mating of the first housing 72 and the second housing 73 during assembly, improving production efficiency. Simultaneously, the mating of the first housing 72 and the second housing 73 defines the mounting cavity 71, facilitating the assembly of components such as the transmission device 20 into the mounting cavity 71. Furthermore, the assembly angle and sequence of the first housing 72 and the second housing 73 can be adjusted according to the available space and the arrangement of each component, thereby reducing assembly difficulty and improving assembly efficiency.

During the product design process, the mating surfaces of the first shell 72 and the second shell 73 can be adaptively adjusted according to the assembly environment and usage needs, thereby meeting more product design requirements.

In some embodiments of this application, as shown in Figures 3 and 4, a mounting plate 74 is provided on the housing 70, and a through hole 741 is formed on the mounting plate 74 along the thickness direction. The through hole 741 communicates with the mounting cavity 71. The drive device 10 is fixed on the mounting plate 74. The drive device 10 has a rotor and an output shaft sleeve 11 connected to the rotor. The output shaft sleeve 11 passes through the through hole 741 and is connected to the transmission device 20 for transmission. Preferably, the drive device 10 is a drive motor, and the output shaft sleeve 11 is coaxially connected to the first shaft 50 through the coupling 12. By fixing the drive device 10 on the mounting plate 74 and connecting the output shaft sleeve 11 to the first shaft 50 through the connecting hole 741, the size of the actuator 100 can be further reduced, the difficulty of arranging the actuator 100 on the vehicle can be reduced, and the drive device 10 is more stable than the transmission device 20 during the operation of the actuator 100, which can improve the coaxiality of the output shaft sleeve 11 and the first shaft 50, thereby improving the transmission efficiency between the drive device 10 and the transmission device 20.

In some embodiments of this application, as shown in Figures 3 and 4, the mounting plate 74 has a flange 742 around its periphery. The flange 742 cooperates with the mounting plate 74 to define a positioning groove, and one end of the drive device 10 extends into the positioning groove. In this way, the flange 742 can abut against the drive device 10, thereby further improving the reliability and stability of the connection between the drive device 10 and the mounting plate 74. Furthermore, the positioning groove provides positioning during assembly, thereby reducing assembly difficulty and improving assembly accuracy. In addition, providing a flange 742 around the periphery of the mounting plate 74 to form a positioning groove avoids the need for slotting on the mounting plate 74, which would reduce its strength, thus ensuring the reliability of the connection between the mounting plate 74 and the drive device 10.

In some embodiments of this application, as shown in Figures 1-4, the actuator 100 further includes a wheel connector 80, and the linear motion component 40 is adapted to connect to the wheel via the wheel connector 80. During product design, the size or structure of the wheel connector 80 can be adjusted to meet more product design needs and reduce product design complexity.

The suspension assembly according to a second aspect of this application includes: the actuator 100 described above according to a first aspect of this application.

According to the second aspect of the present application, by providing the actuator 100 according to the first aspect of the present application, the reliability of the suspension assembly during operation can be improved.

The vehicle according to a third aspect of this application includes: the suspension assembly described above according to a first aspect of this application.

The vehicle has a body and wheels, and the actuator 100 is fixed to one of the body and wheels, while the other of the body and wheels is connected to the linear motion component 40.

Preferably, the actuator 100 is fixed to the vehicle body, and the linear motion component 40 is connected to the wheel. During the operation of the vehicle, the linear motion component 40 pushes the vehicle body and the wheel to move relative to each other according to the change in the distance between the vehicle body and the wheel to adjust the posture of the vehicle body, thereby achieving active vibration reduction of the vehicle.

The vehicle according to the third aspect of this application can improve the reliability of the vehicle during operation by providing the suspension assembly according to the second aspect of this application.

In the description of this application, it should be understood that the terms "center", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this application.

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 application, "multiple" means two or more, unless otherwise explicitly specified.

In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "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 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 application according to the specific circumstances.

In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are 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. 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.

Although embodiments of this application 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 this application, the scope of which is defined by the claims and their equivalents.

Claims (15)

An actuator, comprising: Drive unit; Speed change mechanism; The output component is connected to the drive device via a speed change device. A linear motion component, wherein the output component cooperates with the linear motion component to drive the linear motion component to move linearly. The speed change device and the drive device are respectively located on both sides of the linear motion component. According to claim 1, the output component is an output gear, the linear motion component is a rack, and the output gear meshes with the rack to drive the rack to move linearly. According to claim 2, the output gear is a helical gear, and the rack is provided with a plurality of helical teeth adapted to the output gear. The actuator according to any one of claims 1-3, wherein the speed changing device comprises: A first gear and a first shaft, wherein the first shaft extends along the width direction of the linear motion component and extends to both sides of the linear motion component, one end of the first shaft is connected to the drive device, and the first gear is fixed to the other end of the first shaft; The second gear and the second shaft are meshed with the first gear. The diameter of the second gear is larger than that of the first gear. The second shaft extends along the width direction of the linear motion component. The second gear and the output component are both sleeved and fixed on the second shaft. According to claim 4, the first gear and the second gear are both helical gears. The actuator according to any one of claims 1-5 further includes: a guide member having a guide groove, wherein the linear motion component is movably disposed in the guide groove. The actuator according to any one of claims 1-6 further includes: a housing, wherein a mounting cavity is defined within the housing, the transmission device is disposed within the mounting cavity, the linear motion component is disposed within the mounting cavity, and the lower end of the linear motion component extends out of the mounting cavity for connecting a wheel. According to claim 7, the actuator is fixed to the housing. The actuator according to claim 8, wherein the housing comprises: The first shell has one side open; The second shell is separate from the first shell. The second shell covers the open side of the first shell and cooperates with the first shell to define the mounting cavity. According to claim 9, the mating surfaces of the first housing and the second housing are parallel to the output shaft of the drive device. Alternatively, the mating surfaces of the first and second housings are perpendicular to the output shaft of the drive device. According to claim 8, the actuator is provided with a mounting plate on the housing, and a through hole is formed on the mounting plate along the thickness direction, the through hole communicating with the mounting cavity. The drive device is fixed to the mounting plate. The drive device has a rotor and an output shaft sleeve connected to the rotor. The output shaft sleeve passes through the connecting hole and is connected to the speed change device for transmission. According to the actuator of claim 11, the mounting plate has a flange around its periphery, the flange cooperates with the mounting plate to define a positioning groove, and one end of the driving device extends into the positioning groove. The actuator according to claim 7 further includes: a wheel connector, wherein the linear motion component is adapted to be connected to the wheel via the wheel connector. A suspension assembly comprising: the actuator as described in any one of claims 1-13. A vehicle comprising: the suspension assembly of claim 14.