CN118117820A

CN118117820A - Actuator, suspension assembly and vehicle

Info

Publication number: CN118117820A
Application number: CN202410531915.9A
Authority: CN
Inventors: 廖银生; 孙宪猛; 张丰; 郑亚丽; 郑震霆
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2024-04-29
Filing date: 2024-04-29
Publication date: 2024-05-31

Abstract

The invention discloses an actuator, a suspension assembly and a vehicle, and relates to the technical field of vehicles; the linear motion component extends along the up-down direction, and the output piece is matched with the linear motion component to drive the linear motion component to move up and down; the driving module comprises a driving motor and a speed change mechanism which are integrally arranged. According to the actuator disclosed by the invention, active vibration reduction of a vehicle can be realized, the driving motor and the speed change mechanism are integrated, the overall integration level of the driving motor and the speed change mechanism is higher, the structure is compact, the occupation of transverse space is small, and the arrangeability of the driving motor and the speed change mechanism in the whole vehicle is improved.

Description

Actuator, suspension assembly and vehicle

Technical Field

The invention relates to the technical field of vehicles, in particular to an actuator, a suspension assembly and a vehicle.

Background

In the related art, when the motor is applied to the vehicle actuator, the rotating speed of the common motor is higher, in order to obtain a proper output rotating speed, the motor needs to be changed in speed, and the motor and the speed changing device are directly connected in a currently commonly adopted mode.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide an actuator, in which a driving motor and a speed change mechanism are integrally provided, which has a compact structure and a small lateral space occupation, and which improves the disposability of the driving motor and the speed change mechanism in the whole vehicle.

The invention further provides a suspension assembly with the actuator.

The invention further provides a vehicle with the suspension assembly.

An actuator according to an embodiment of the first aspect of the present invention includes: a driving module; the driving module is connected with the output piece; the linear motion component extends along the up-down direction, and the output piece is matched with the linear motion component and used for driving the linear motion component to move up and down; the driving module comprises a driving motor and a speed change mechanism which are integrally arranged.

According to the actuator provided by the embodiment of the invention, active vibration reduction of a vehicle can be realized, the driving motor and the speed change mechanism are integrated, the overall integration level of the driving motor and the speed change mechanism is higher, the structure is compact, the occupation of transverse space is less, and the arrangeability of the driving motor and the speed change mechanism in the whole vehicle is improved.

According to some embodiments of the invention, the drive module comprises a motor housing, the drive motor and the speed change mechanism are installed in the motor housing, the drive motor comprises a rotor set and a motor stator, and the speed change mechanism is located at one axial end of the rotor set and is in transmission connection with the rotor set.

According to some embodiments of the invention, the rotor set is mounted within the motor stator, the drive motor further comprising: and the motor shaft is coaxially fixed in the rotor group and is in transmission connection with the speed change mechanism.

According to some embodiments of the invention, the drive module further comprises a sensor assembly for acquiring the rotational speed and the rotational angle of the motor shaft.

According to some embodiments of the invention, the sensor assembly is disposed within the motor housing.

According to some embodiments of the invention, the sensor assembly comprises: the sensor stator is fixedly connected with the motor shell, and the sensor rotor is coaxially connected with the motor shaft.

According to some embodiments of the invention, the motor housing includes a first housing and a second housing that are detachably connected.

According to some embodiments of the invention, the first housing and the second housing are connected along an axial direction of the motor shaft, the motor shaft is located in the first housing and partially extends into the second housing, a first positioning ring surrounding a rotation axis of the motor shaft is arranged in the second housing, and the motor shaft is connected with the first positioning ring through a bearing.

According to some embodiments of the invention, the motor shaft comprises a motor shaft body and a first mounting bracket arranged on the outer peripheral side of the motor shaft body, the first mounting bracket is provided with a second positioning ring matched with the first positioning ring, and the first positioning ring surrounds the outer peripheral side of the second positioning ring.

According to some embodiments of the invention, the motor shaft is integrally formed to construct the motor shaft body and the first mounting bracket.

According to some embodiments of the invention, the speed change mechanism includes: a speed change gear set and an output shaft, the speed change gear set comprising: the planetary gear is meshed between the outer gear ring and the inner gear ring, the inner gear ring is in transmission connection with the rotor set, and the planetary gear is in transmission connection with the output shaft.

According to some embodiments of the invention, the output shaft comprises: the planetary gear comprises an output shaft body and a second mounting bracket connected with the output shaft body, wherein the second mounting bracket is provided with a rotating shaft coaxially connected with the planetary gear.

According to some embodiments of the invention, the rotating shafts are provided with at least two, each of which is fixedly connected with one of the planet wheels.

According to some embodiments of the invention, the output shaft is integrally formed to construct the output shaft body and the second mounting bracket.

According to some embodiments of the invention, the rotor set and the speed change gear set are both located in the motor stator, and the outer gear ring is fixedly connected to an inner peripheral side of the motor stator.

According to some embodiments of the invention, the actuator further comprises: the transmission shaft extends along the width direction of the linear motion part, the output piece is sleeved and fixed on the transmission shaft, and the transmission shaft is in transmission connection with the driving module through a coupler.

According to some embodiments of the invention, the actuator further comprises an actuator housing having a movable channel extending in an up-down direction therein, the drive shaft, the output member and the linear motion member being located within the movable channel, at least a portion of the linear motion member being adapted to protrude from a protruding opening of the movable channel for connection to a wheel.

According to some embodiments of the invention, the actuator further comprises: a vibration damping elastic member; the first supporting block is fixed on the actuator shell and is arranged close to the extending opening of the movable channel; the second supporting block is fixedly connected with the linear motion part outside the movable channel, and the vibration reduction elastic piece is arranged between the first supporting block and the second supporting block.

According to some embodiments of the invention, the damping spring is a damping spring that is sleeved on the linear motion member.

According to some embodiments of the invention, at least one guide is provided in the movable passage, the guide being provided on an outer peripheral side of the linear motion member for guiding a moving direction of the linear motion member.

According to some embodiments of the invention, at least one limiting member is disposed in the movable channel, and the limiting member is used for limiting the movable range of the linear motion component.

According to some embodiments of the invention, the actuator housing has a mounting slot open to one side of the drive module, the end of the drive module being mounted in the mounting slot.

According to some embodiments of the invention, the mounting slot has a first step surface and a second step surface at an opening thereof, the first step surface and the second step surface being spaced apart along an axial direction of the output member to construct a first detent and a second detent for locating the drive module at the opening of the mounting slot.

A suspension assembly according to an embodiment of the second aspect of the present invention includes: an actuator according to an embodiment of the above first aspect of the present invention.

According to the suspension assembly provided by the embodiment of the invention, through the arrangement of the actuator, the suspension assembly can play roles in supporting a vehicle body and relieving impact, so that the smoothness of the vehicle during running can be improved, and the vehicle is more comfortable to ride.

According to an embodiment of the third aspect of the present invention, a vehicle includes: a vehicle body and wheels; according to the suspension assembly of the embodiment of the second aspect of the present invention, the suspension assembly is connected between the vehicle body and the wheel.

According to the vehicle provided by the embodiment of the invention, the suspension assembly can play a role in supporting the vehicle body and relieving impact, so that the smoothness of the vehicle during running can be improved, and the vehicle is more comfortable to ride.

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

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic illustration of an actuator according to some embodiments of the invention;

FIG. 2 is a perspective view of a drive module according to some embodiments of the invention;

FIG. 3 is a side view of the drive module of FIG. 2;

FIG. 4 is a cross-sectional view taken along line A-A in FIG. 3;

FIG. 5 is a schematic illustration of an actuator according to some embodiments of the invention, wherein the damping spring is not shown;

Fig. 6 is a sectional view taken along line B-B in fig. 5.

Reference numerals:

100. An actuator;

10. a driving module; 1. a motor housing; 11. a first housing; 12. a second housing; 121. a first positioning ring;

20. A driving motor; 21. a rotor group; 22. a motor stator; 23. a motor shaft; 231. a motor shaft body; 232. a first mounting bracket; 233. a second positioning ring; 24. a bearing; 25. a fastener;

30. A sensor assembly; 31. a sensor stator; 32. a sensor mover;

40. A speed change mechanism; 41. a speed change gear set; 411. an outer ring gear; 412. an inner gear ring; 413. a planet wheel; 42. an output shaft; 421. an output shaft body; 422. a second mounting bracket; 423. a rotating shaft;

51. An actuator housing; 511. a mounting groove; 512. a first step surface; 513. a second step surface; 514. a first positioning groove; 515. a second positioning groove; 516. an installation space; 52. a movable channel; 521. a transmission shaft; 522. an output member; 523. a linear motion member; 5241. a first guide; 5242. a second guide; 5251. a first limiting member; 5252. a second limiting piece; 526. a first bearing; 527. a second bearing; 53. a vibration damping elastic member; 54. a first support block; 55. a second support block; 56. a lower yoke; 57. a coupling.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

An actuator 100 according to an embodiment of the present invention is described below with reference to fig. 1-6.

The actuator 100 according to the embodiment of the first aspect of the present invention includes a driving module 10, an output member 522 and a linear motion member 523, the driving module 10 is connected to the output member 522, the linear motion member 523 extends in an up-down direction, and the output member 522 cooperates with the linear motion member 523 to drive the linear motion member 523 to move up and down, wherein the driving module 10 includes a driving motor 20 and a speed change mechanism 40 integrally provided.

For example, the output member 522 may be a gear, the linear motion member 523 may be a rack, the output member 522 is engaged with the linear motion member 523, and the transmission mechanism 40 and the driving motor 20 are integrally disposed on the same side of the linear motion member 523, so that the linear motion member 523 and the motor shaft 23 of the driving motor 20 may be prevented from generating motion interference.

In the running process of the vehicle, when the posture of the vehicle body needs to be adjusted, the driving motor 20 drives the linear motion component 523 to move up and down through the speed change mechanism 40 and the output piece 522, the linear motion component 523 pushes the wheels and the vehicle body to move relatively in the up-down direction, and the distance between the wheels and the vehicle body is adjusted, so that the posture of the vehicle body is adjusted, namely active vibration reduction of the vehicle is realized.

The driving motor 20 responds faster, and the response speed of the actuator 100 can be improved, so that the time required for adjusting the posture of the vehicle body is reduced, and the driving experience of personnel in the vehicle is improved. The output member 522 and the linear motion member 523 are simple in structure and convenient to process during production.

The variable speed mechanism 40 may achieve variable speed and torque up of the drive motor 20, and may reduce the power of the drive motor 20 in the event that the output torque of the output member 522 meets the use requirement, it will be appreciated that the smaller the power of the drive motor 20, the smaller the size of the drive motor 20, and thus the smaller the size of the drive motor 20 in the actuator 100, thereby facilitating the placement of the actuator 100 on a vehicle.

On the actuator 100, the space occupied by the driving module 10 is larger, the space occupied by the driving module 10 can be reduced by integrating the driving motor 20 and the speed change mechanism 40, the overall integration level of the driving motor 20 and the speed change mechanism 40 is higher, the structure is compact, the occupation of the transverse space is less, and the arrangeability of the driving motor 20 and the speed change mechanism 40 in the whole vehicle is improved.

According to the actuator 100 of the embodiment of the invention, active vibration reduction of a vehicle can be realized, the driving motor 20 and the speed change mechanism 40 are integrally arranged, the overall integration level of the driving motor 20 and the speed change mechanism 40 is high, the structure is compact, the occupation of transverse space is small, and the arrangeability of the driving motor 20 and the speed change mechanism 40 in the whole vehicle is improved.

According to some embodiments of the present invention, referring to fig. 2-4, a drive module 10 includes a motor housing 1, a drive motor 20 and a speed change mechanism 40 are all mounted within the motor housing 1, and the motor housing 1 may be used to support, seal and protect the drive motor 20 and the speed change mechanism 40. The driving motor 20 and the speed change mechanism 40 are integrated into the motor casing 1, and the internal space of the motor casing 1 can be fully utilized.

The drive motor 20 includes a rotor group 21 and a motor stator 22, and the motor stator 22 is held stationary within the drive motor 20, and the rotor group 21 is rotatable about an axis of the motor stator 22. When the drive motor 20 is in operation, the motor stator 22 is used to provide the required excitation magnetic field and the rotor set 21 is used to provide the permanent steady magnetic field. For example, the motor stator 22 may be mounted in the rotor set 21, and the rotor set 21 may be mounted in the motor stator 22.

The speed change mechanism 40 is located at one axial end of the rotor set 21, so that the space occupied by the speed change mechanism 40 in the radial direction can be reduced, the speed change mechanism 40 is in transmission connection with the rotor set 21, when the rotor set 21 rotates, the speed change mechanism 40 can synchronously rotate with the rotor set 21, and the speed change mechanism 40 can change the rotation speed output by the rotor set 21.

According to some embodiments of the present invention, referring to fig. 2-4, the rotor set 21 is installed in the motor stator 22, the driving motor 20 further includes a motor shaft 23, the motor shaft 23 is coaxially fixed inside the rotor set 21, and the motor shaft 23 is in transmission connection with the speed change mechanism 40, and the motor shaft 23 is used for fixedly connecting the driving motor 20 with the speed change mechanism 40, so that the stability of connection of the driving motor 20 with the speed change mechanism 40 is improved. For example, the motor shaft 23 and the rotor set 21 may be coaxially fixed inside the motor stator 22 by the fastener 25, and the rotor set 21, the motor shaft 23, and the fastener 25 may be coaxially rotated when the driving motor 20 is operated.

When the driving module 10 is operated, the motor stator 22 of the driving motor 20 is kept motionless, the rotor set 21 rotates around the axis of the motor stator 22 and drives the motor shaft 23 to coaxially rotate, the motor shaft 23 drives the speed changing mechanism 40 to coaxially rotate, and the speed changing mechanism 40 changes the output rotation speed of the motor shaft 23.

According to some embodiments of the present invention, referring to fig. 2-4, the driving module 10 further includes a sensor assembly 30, wherein the sensor assembly 30 is disposed in the motor housing 1 for acquiring the rotation speed and the rotation angle of the motor shaft 23, and the sensor assembly 30 may be fed back to the control center of the vehicle according to the detected rotation speed and rotation angle of the motor shaft 23 for adjusting the rotation speed and rotation angle of the motor shaft 23. For example, the sensor assembly 30 may be provided on a side of the motor casing 1 remote from the speed change mechanism 40, and the rationality of the sensor assembly 30 and the speed change mechanism 40 being disposed within the motor casing 1 may be improved.

According to some embodiments of the present invention, referring to fig. 4, the sensor assembly 30 includes a sensor stator 31 and a sensor mover 32, the sensor stator 31 is fixedly connected to the motor housing 1, and the sensor mover 32 is coaxially connected to the motor shaft 23. When the driving motor 20 is operated, the motor shaft 23 can drive the sensor rotor 32 to coaxially rotate, so that the sensor rotor 32 can conveniently acquire the rotating speed and the rotating angle of the motor shaft 23.

According to some embodiments of the present invention, referring to fig. 2 to 4, the motor casing 1 includes a first casing 11 and a second casing 12 detachably connected, and for example, the first casing 11 and the second casing 12 may be fixedly connected using bolts. By providing the first housing 11 and the second housing 12 in detachable connection, the installation of the internal structure of the drive module 10 can be facilitated.

According to some embodiments of the present invention, referring to fig. 2 to 4, the first housing 11 and the second housing 12 are connected in an axial direction of the motor shaft 23, the motor shaft 23 is located in the first housing 11, and a portion of the motor shaft 23 extends into the second housing 12, a first positioning ring 121 is provided in the second housing 12, the first positioning ring 121 is disposed around a rotation axis 423 of the motor shaft 23, the motor shaft 23 is connected with the first positioning ring 121 through a bearing 24, and the first positioning ring 121 is used for positioning the motor shaft 23. The bearing 24 is arranged between the motor shaft 23 and the first positioning ring 121, the outer ring of the bearing 24 is fixed with the first positioning ring 121, and when the motor shaft 23 rotates, the motor shaft 23 can rotate coaxially with the inner ring of the bearing 24 relative to the outer ring of the bearing 24, so that the friction force during rotation of the motor shaft 23 can be reduced, and the motor shaft 23 can rotate more smoothly.

According to some embodiments of the present invention, referring to fig. 1 to 4, the motor shaft 23 includes a motor shaft body 231 and a first mounting bracket 232, the first mounting bracket 232 is disposed at an outer circumferential side of the motor shaft body 231, the first mounting bracket 232 has a second positioning ring 233, the second positioning ring 233 is engaged with the first positioning ring 121, and the first positioning ring 121 surrounds an outer circumferential side of the second positioning ring 233, and the above-mentioned bearing 24 is disposed between the first positioning ring 121 and the second positioning ring 233. For example, the sensor mover 32 is coaxially fixed to the motor shaft body 231.

According to some embodiments of the present invention, referring to fig. 4, the motor shaft 23 is integrally formed to construct the motor shaft body 231 and the first mounting bracket 232, the structural strength of the motor shaft 23 may be increased, and the process of mounting the first mounting bracket 232 to the motor shaft body 231 may be omitted.

According to some embodiments of the present invention, referring to fig. 2-4, the speed change mechanism 40 comprises a speed change gear set 41 and an output shaft 42, the speed change gear set 41 comprises an outer gear ring 411, an inner gear ring 412 and a plurality of planet gears 413, the planet gears 413 are meshed between the outer gear ring 411 and the inner gear ring 412, the inner gear ring 412 is in driving connection with the rotor set 21, and the planet gears 413 are in driving connection with the output shaft 42. For example, the driving motor 20 further includes a motor shaft 23, and the motor shaft 23 is disposed through the ring gear 412, so that the motor shaft 23 and the ring gear 412 can coaxially rotate, and the motor shaft 23 can provide power for the ring gear 412.

When the driving module 10 is in operation, the motor stator 22 of the driving motor 20 is kept motionless, the rotor set 21 rotates around the axis of the motor stator 22, the rotor set 21 can drive the annular gear 412 to coaxially rotate when rotating, and the annular gear 412 drives the planet gears 413 to coaxially rotate when rotating; the plurality of planet gears 413 are meshed with the outer gear ring 411 so that the plurality of planet gears 413 can rotate around the axis of the planet gears 413 while rotating around the axis of rotation of the inner gear ring 412; the plurality of planetary gears 413 can drive the output shaft 42 to coaxially rotate when rotating around the rotation axis of the ring gear 412, and the rotational speed output by the rotor set 21 can be subjected to speed change processing when the speed change gear set 41 rotates.

The speed change mechanism 40 adopts a planetary gear mode, can realize a high-precision controllable speed change ratio, meets the requirement of large torque of the actuator 100, and has stable transmission, high efficiency, compact structure and good adjustability of the speed change gear set 41.

According to some embodiments of the present invention, referring to fig. 1-4, the output shaft 42 includes an output shaft body 421 and a second mounting bracket 422, the second mounting bracket 422 is connected to the output shaft body 421, the second mounting bracket 422 has a rotation shaft 423 coaxially connected to the planet gears 413, and the second mounting bracket 422 has a space with the ring gear 412, so that the second mounting bracket 422 can be connected to the planet gears 413. The planet wheel 413 is meshed between the outer gear 411 and the inner gear 412, and the second mounting support 422 is coaxially connected with the planet wheel 413, that is, the rotation radius of the second mounting support 422 is larger than that of the inner gear 412, and the rotation speed of the second mounting support 422 is smaller than that of the inner gear 412, so that the speed change gear set 41 can achieve the purpose of speed change processing on the rotation speed output by the rotor set 21.

According to some embodiments of the present invention, referring to fig. 2 to 4, at least two rotating shafts 423 are provided, and each rotating shaft 423 is fixedly connected to one planetary gear 413, so that stability of connection between the second mounting support 422 and the plurality of planetary gears 413 can be increased, and stability of rotation of the output shaft 42 can be ensured.

According to some embodiments of the present invention, referring to fig. 2 to 4, the output shaft 42 is integrally formed to construct the output shaft body 421 and the second mounting bracket 422, the structural strength of the output shaft 42 may be increased, and the process of mounting the second mounting bracket 422 to the output shaft body 421 may be omitted.

According to some embodiments of the present invention, referring to fig. 2-4, the rotor set 21 and the speed-change gear set 41 are both located in the motor stator 22, and the outer gear ring 411 is fixedly connected to the inner peripheral side of the motor stator 22, so that the internal space of the motor stator 22 can be fully utilized, the speed-change gear set 41 is integrated in the motor stator 22, the occupation of the transverse space occupied by the speed-change gear set 41 is reduced, and the overall integration level of the driving module 10 is high and the structure is compact. For example, the above-described fastener for fixing the motor shaft 23 and the rotor set 21 is located between the outer ring gear 411 and the motor shaft 23 and the rotor set 21.

According to some embodiments of the present invention, referring to fig. 1-6, the actuator 100 further includes a driving shaft 521, the driving shaft 521 extends along the width direction of the linear motion member 523, the output member 522 is sleeved on and fixed to the driving shaft 521, the driving shaft 521 is in driving connection with the driving module 10 through a coupling 57, and the coupling 57 may be used to achieve transmission of torque and rotation speed between the speed change mechanism 40 and the driving shaft 521, and may also ensure stability of transmission of torque and rotation speed between the speed change mechanism 40 and the driving shaft 521.

The speed change mechanism 40 is in transmission connection with the transmission shaft 521, the transmission shaft 521 can be driven to rotate when the speed change mechanism 40 rotates, the output piece 522 can be driven to coaxially rotate when the transmission shaft 521 rotates, the linear motion part 523 can be driven to move up and down when the output piece 522 rotates, and the output piece 522 and the linear motion part 523 are meshed to convert the rotation motion of the output piece 522 into the linear motion of the linear motion part 523, so that the aim of adjusting the distance between a vehicle body and wheels is fulfilled. The structure of the linear motion member 523 and the output member 522 is applied to the actuator 100, so that the relative distance between the vehicle body and the wheels can be dynamically adjusted as required, and the motion response is rapid and direct.

In one example, referring to fig. 1, the output member 522 and the linear motion member 523 adopt helical teeth, so that the output member 522 and the linear motion member 523 can be meshed more fully and continuously, smoothness in the transmission process is ensured, and the helical angle of the helical teeth is smaller, so that the axial force can be effectively reduced, and the service life of the transmission shaft 521 is prolonged.

According to some embodiments of the present invention, referring to fig. 1 and 5-6, the actuator 100 further includes an actuator housing 51, wherein the actuator housing 51 has a movable channel 52 therein, the movable channel 52 extends in an up-down direction, and the transmission shaft 521, the output member 522, and the linear motion member 523 are located in the movable channel 52, and the actuator housing 51 may be used to support, seal, and protect the transmission shaft 521, the output member 522, and the linear motion member 523. At least part of the linear motion member 523 is adapted to extend from the extending opening of the movable channel 52 for connecting with a wheel, and the linear motion member 523 can extend and retract in the movable channel 52 through the extending opening to drive the vibration damping elastic member 53 to move in the up-down direction so as to adjust the relative distance between the vehicle body and the wheel.

In one example, referring to fig. 1, a first bearing 526 and a second bearing 527 are respectively sleeved at two ends of a transmission shaft 521, outer rings of the first bearing 526 and the second bearing 527 are both fixed on an actuator housing 51, and when the transmission shaft 521 rotates, inner rings of the first bearing 526 and the second bearing 527 can be driven to rotate, so that friction force when the transmission shaft 521 rotates can be reduced, and the transmission shaft 521 rotates more smoothly.

According to some embodiments of the present invention, referring to fig. 1, the actuator 100 further includes a vibration damping elastic member 53, a first support block 54, and a second support block 55, the first support block 54 is fixed to the actuator housing 51 and disposed adjacent to the protruding opening of the movable channel 52, a through hole opposite to the protruding opening is provided in the first support block 54, and one end of the linear motion member 523 is adapted to protrude from the protruding opening and the through hole. The second supporting block 55 is fixedly connected with the linear motion part 523 outside the movable channel 52 to drive the second supporting block 55 to move, and the vibration damping elastic piece 53 is arranged between the first supporting block 54 and the second supporting block 55. For example, the vibration damping elastic member 53 may be a spring, a leaf spring, an air spring, or a coil spring.

When the vehicle runs on a bumpy road, the wheels can jump up and down; when the wheels jump downwards, the output piece 522 can drive the linear motion part 523 to move towards the direction away from the movable channel 52, and the linear motion part 523 can simultaneously drive the second support block 55 to move towards the direction away from the movable channel 52, and the vibration reduction elastic piece 53 between the first support block 54 and the second support block 55 is elastically deformed, so that the vibration reduction elastic piece 53 can be elongated to increase the relative distance between the vehicle body and the wheels, so that the height of the vehicle body is kept unchanged, and the vibration reduction elastic piece 53 can play a role in supporting the vehicle body and relieving impact when being elastically deformed so as to improve the smoothness of the vehicle during running.

When the wheels jump upwards, the output piece 522 can drive the linear motion part 523 to move towards the direction close to the movable channel 52, and the linear motion part 523 can simultaneously drive the second support block 55 to move towards the direction close to the movable channel 52, so that the vibration reduction elastic piece 53 between the first support block 54 and the second support block 55 is elastically deformed, the vibration reduction elastic piece 53 can be shortened to reduce the relative distance between the vehicle body and the wheels, so that the height of the vehicle body is kept unchanged, and the vibration reduction elastic piece 53 can play a role in supporting the vehicle body and relieving impact when being elastically deformed so as to improve the smoothness of the vehicle during running.

For example, at the end of the second support block 55 facing away from the damping spring 53, a lower fork arm 56 is mounted, the lower fork arm 56 being intended to be connected to a wheel for achieving a rigid connection between the actuator 100 and the wheel. When the linear motion component 523 moves, the lower fork arm 56 can drive the wheels to move so as to adjust the relative distance between the wheels and the vehicle body.

According to some embodiments of the present invention, referring to fig. 1, the damping elastic member 53 is a damping spring, which is sleeved outside the linear motion member 523, so that the damping elastic member 53 can be manufactured at low cost and can be conveniently installed.

According to some embodiments of the present invention, referring to fig. 1 and 6, at least one guide is disposed in the movable channel 52, one guide may be disposed in the movable channel 52, a plurality of guides may be disposed in the movable channel 52, and the number of the guides may be determined according to the specific structure of the linear motion member 523 in the movable channel 52. The guide is provided at the outer peripheral side of the rectilinear motion component 523 for guiding the moving direction of the rectilinear motion component 523, and can guide the rectilinear motion component 523 to move in the direction perpendicular to the rotation axis of the output member 522, avoiding the rectilinear motion component 523 from moving in the radial direction.

In a specific example, referring to fig. 1 and 6, two guiding elements may be provided, namely, a first guiding element 5241 and a second guiding element 5242, where the first guiding element 5241 may be located on the actuator housing 51 and is disposed near the engagement position of the output element 522 and the linear moving member 523, so that, on one hand, the position of the linear moving member 523 in the movable channel 52 is limited, and on the other hand, a pre-tightening function is further provided, and the magnitude of the engaging force of the output element 522 and the linear moving member 523 can be adjusted in real time, so as to ensure that the output element 522 and the linear moving member 523 maintain a good engaged state. For example, the first guide 5241 can be a bushing slide bearing.

The second guide 5242 may be disposed in the movable channel 52 at a position close to the first supporting block 54, and may guide both axial ends of the linear motion member 523 in cooperation with the first guide 5241 and the second guide 5242, for limiting a moving direction of the linear motion member 523.

According to some embodiments of the present invention, referring to fig. 1 and 6, at least one limiting member is disposed in the movable channel 52, one limiting member may be disposed in the movable channel 52, and a plurality of limiting members may be disposed in the movable channel 52, where the number of limiting members may be determined according to the specific structure of the linear motion member 523 in the movable channel 52. The limiting member is used for limiting the movement range of the linear movement member 523, and preventing the linear movement member 523 from exceeding a preset range when moving, so that the linear movement member 523 fails to engage with the output member 522.

In a specific example, referring to fig. 1 and 6, two limiting members, namely, a first limiting member 5251 and a second limiting member 5252, may be provided, and the first limiting member 5251 may be located in the actuator housing 51 and at an upper end in the movable channel 52, for limiting the displacement amount of the linear motion member 523 in an upward motion. The second limiting member 5252 may be disposed in the movable channel 52 and located at the engagement between the output member 522 and the linear moving member 523 and above the engagement between the output member 522 and the linear moving member 523, for limiting the displacement of the linear moving member 523 in the downward direction, so as to avoid excessive displacement of the linear moving member 523 in the downward direction, which results in failure of engagement between the linear moving member 523 and the output member 522.

According to some embodiments of the present invention, referring to fig. 1 and 6, the actuator housing 51 has a mounting groove 511 opened toward one side of the driving module 10, and the end of the driving module 10 is mounted in the mounting groove 511, effectively ensuring concentricity of the output shaft 42 of the driving module 10 and the transmission shaft 521. For example, bolts may be used to fixedly attach the drive module 10 to the actuator housing 51.

For example, there is also an installation space 516 between the installation groove 511 and the movable tunnel 52, and the coupling 57 is located in the installation space 516.

According to some embodiments of the present invention, referring to fig. 1 and 6, the opening of the mounting groove 511 has a first step surface 512 and a second step surface 513, and the first step surface 512 and the second step surface 513 are spaced apart along the axial direction of the output member 522, so that a first positioning groove 514 and a second positioning groove 515 for positioning the driving module 10 are configured at the opening of the mounting groove 511, and the end of the driving module 10 can be precisely positioned, so as to further ensure concentricity of the output shaft 42 and the transmission shaft 521 of the driving module 10.

A suspension assembly according to an embodiment of the second aspect of the present invention includes: an actuator 100 according to the embodiment of the first aspect of the present invention described above.

According to the suspension assembly provided by the embodiment of the invention, the suspension assembly can play a role in supporting a vehicle body and relieving impact by arranging the actuator 100, so that the smoothness of the vehicle during running can be improved, and the vehicle is more comfortable to ride.

A vehicle according to an embodiment of the third aspect of the present invention includes a vehicle body and wheels; according to the suspension assembly of the second aspect of the embodiment of the invention, the suspension assembly is connected between the vehicle body and the wheels, and the suspension assembly is used for adjusting the relative distance between the vehicle body and the wheels, so that the suspension assembly can play a role in supporting the vehicle body and relieving impact, and the smoothness of the vehicle during running can be improved, so that the vehicle is more comfortable to ride.

In the description of the present specification, reference to the terms "some embodiments," "optionally," "further," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An actuator, comprising:

A driving module;

The driving module is connected with the output piece;

The linear motion component extends along the up-down direction, and the output piece is matched with the linear motion component and used for driving the linear motion component to move up and down;

The driving module comprises a driving motor and a speed change mechanism which are integrally arranged.

2. The actuator of claim 1, wherein the drive module comprises a motor housing, the drive motor and the speed change mechanism are mounted within the motor housing, the drive motor comprises a rotor set and a motor stator, and the speed change mechanism is located at one axial end of the rotor set and is in driving connection with the rotor set.

3. The actuator of claim 2, wherein the rotor set is mounted within the motor stator, the drive motor further comprising: and the motor shaft is coaxially fixed in the rotor group and is in transmission connection with the speed change mechanism.

4. The actuator of claim 3, wherein the drive module further comprises a sensor assembly for acquiring rotational speed and rotational angle of the motor shaft.

5. The actuator of claim 4, wherein the sensor assembly is disposed within the motor housing.

6. The actuator of claim 5, wherein the sensor assembly comprises: the sensor stator is fixedly connected with the motor shell, and the sensor rotor is coaxially connected with the motor shaft.

7. The actuator of claim 3, wherein the motor housing comprises a first housing and a second housing that are removably coupled.

8. The actuator of claim 7, wherein the first housing and the second housing are connected in an axial direction of the motor shaft, the motor shaft is located in the first housing and partially extends into the second housing, a first retainer ring is disposed in the second housing around a rotational axis of the motor shaft, and the motor shaft is connected to the first retainer ring by a bearing.

9. The actuator of claim 8, wherein the motor shaft includes a motor shaft body and a first mounting bracket disposed on an outer peripheral side of the motor shaft body, the first mounting bracket having a second retainer ring mated with the first retainer ring, the first retainer ring encircling an outer peripheral side of the second retainer ring.

10. The actuator of claim 9, wherein the motor shaft is integrally formed to construct the motor shaft body and the first mounting bracket.

11. The actuator of claim 2, wherein the shift mechanism comprises: a speed change gear set and an output shaft, the speed change gear set comprising: the planetary gear is meshed between the outer gear ring and the inner gear ring, the inner gear ring is in transmission connection with the rotor set, and the planetary gear is in transmission connection with the output shaft.

12. The actuator of claim 11, wherein the output shaft comprises: the planetary gear comprises an output shaft body and a second mounting bracket connected with the output shaft body, wherein the second mounting bracket is provided with a rotating shaft coaxially connected with the planetary gear.

13. The actuator according to claim 12, wherein at least two of said shafts are provided, each of said shafts being fixedly connected to one of said planetary gears.

14. The actuator of claim 12, wherein the output shaft is integrally formed to construct the output shaft body and the second mounting bracket.

15. The actuator of claim 11, wherein the rotor set and the speed change gear set are both located within the motor stator, and the outer teeth are fixedly connected to an inner circumferential side of the motor stator.

16. The actuator of claim 1, further comprising: the transmission shaft extends along the width direction of the linear motion part, the output piece is sleeved and fixed on the transmission shaft, and the transmission shaft is in transmission connection with the driving module through a coupler.

17. The actuator of claim 16, further comprising an actuator housing having a movable channel extending in an up-down direction therein, the drive shaft, the output member, and the linear member each being located within the movable channel, at least a portion of the linear member being adapted to extend from an extension of the movable channel for connection to a wheel.

18. The actuator of claim 17, further comprising: a vibration damping elastic member;

The first supporting block is fixed on the actuator shell and is arranged close to the extending opening of the movable channel;

the second supporting block is fixedly connected with the linear motion part outside the movable channel, and the vibration reduction elastic piece is arranged between the first supporting block and the second supporting block.

19. The actuator of claim 18, wherein the damping spring is a damping spring that is sleeved on the linear motion member.

20. The actuator according to claim 17, wherein at least one guide member is provided in said movable passage, said guide member being provided on an outer peripheral side of said linear movement member for guiding a movement direction of said linear movement member.

21. The actuator of claim 17, wherein at least one stop is disposed within the movable channel, the stop being configured to limit the range of motion of the linear motion member.

22. The actuator of claim 17, wherein the actuator housing has a mounting slot open to one side of the drive module, the end of the drive module being mounted in the mounting slot.

23. The actuator of claim 22, wherein the mounting slot has first and second stepped surfaces at an opening thereof, the first and second stepped surfaces being spaced apart in an axial direction of the output member to construct first and second positioning grooves at the opening of the mounting slot for positioning the drive module.

24. A suspension assembly comprising: the actuator of any one of claims 1-23.

25. A vehicle, characterized by comprising:

A vehicle body and wheels;

the suspension assembly of claim 24, said suspension assembly being connected between said body and said wheel.