Actuator, suspension assembly and vehicle

Abstract

The utility model provides an actuator, a suspension assembly and a vehicle. Comprising a first assembly and a second assembly which can move relatively in the axial direction of the actuator, the first assembly comprises a first rod piece, the second assembly comprises a second rod piece, the second rod piece is provided with a guide cavity in the axial direction of the actuator, and the first rod piece moves relatively in the axial direction of the guide cavity; and the rolling assembly is arranged between the guide cavity and the first rod piece, the rolling assembly is in rolling contact with the guide cavity, and the rolling assembly is in rolling contact with the first rod piece. By adopting a rolling contact mode, a lower friction coefficient can be obtained, the friction resistance between the rolling assembly and the first assembly and the friction resistance between the rolling assembly and the second sub-assembly are reduced, and the power output performance of the actuator is improved. In addition, due to the fact that the frictional resistance is reduced, abrasion between parts can be reduced, and the service life of the actuator is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicles, and particularly relates to an actuator, a suspension assembly and a vehicle. Background Art

[0002] A suspension motor, which is a motor with no contact between the mover and the stator, relies on a changing current passing through the stator coil to generate a changing magnetic field, and generates a certain magnetic force with the permanent magnet of the mover to push the mover to move relative to the stator. It is widely used in actuators in suspension systems to attenuate the vibration of the vehicle body through the thrust of the motor and improve the driving stability of the vehicle.

[0003] Due to processing and manufacturing and assembly problems, during the movement of the mover, the air gap between the outer periphery of the coil and the permanent magnet cannot be guaranteed to be completely uniform, which is likely to generate a magnetic bias force, resulting in a certain lateral force between the mover and the stator, thereby increasing the frictional resistance between the mover and the stator, affecting the dynamic performance of the actuator, and increasing the wear degree of parts.

[0004] In conventional technologies, the relative movement between the mover and the stator is realized through a sliding friction bearing, and this structure will increase the frictional resistance between the mover and the stator and affect the dynamic performance of the motor. Summary of the Utility Model

[0005] The purpose of the embodiments of the utility model is to provide an actuator, a suspension assembly and a vehicle, which can solve the problem that the dynamic performance of the actuator is affected due to the large frictional resistance between the mover and the stator in conventional technologies.

[0006] To solve the above technical problems, the utility model is implemented as follows:

[0007] In a first aspect, the embodiments of the utility model provide an actuator, including:

[0008] A first component and a second component that can move relative to each other along the axis of the actuator. The first component includes a first rod, the second component includes a second rod, a guiding cavity is arranged along the axis of the actuator on the second rod, and the first rod moves relative to the axis of the guiding cavity.

[0009] A rolling component, which is arranged between the guiding cavity and the first rod. The rolling component is in rolling contact with the guiding cavity and is also in rolling contact with the first rod.

[0010] Optionally, the rolling component is arranged between the outer wall of the first rod and the inner wall of the guiding cavity.

[0011] Optionally, the rolling component includes a cage and rolling elements. The cage is sleeved between the outer wall of the first rod and the inner wall of the guiding cavity. The cage is provided with through holes, and at least part of the rolling elements are arranged in the through holes. The through holes are used to limit the rolling elements between the outer wall of the first rod and the inner wall of the guiding cavity.

[0012] Optionally, the rolling elements are in rolling contact with the guiding cavity and are also in rolling contact with the first rod.

[0013] Optionally, at least one of the outer wall of the first rod and the inner wall of the guiding cavity is axially provided with a sliding groove.

[0014] The rolling elements are rolling-connected in the sliding groove.

[0015] Optionally, at least one of the outer wall of the first rod and the inner wall of the guiding cavity is provided with a plurality of the sliding grooves distributed circumferentially.

[0016] Optionally, the plurality of sliding grooves are equidistantly arranged.

[0017] Optionally, the contact surfaces of the rolling elements and the sliding grooves have the same shape, both being curved surfaces.

[0018] Optionally, the rolling elements are spheres.

[0019] Optionally, the radius of curvature of the contact surface between the sliding groove and the rolling element is greater than or equal to the radius of the rolling element.

[0020] Optionally, the actuator further includes a first limiting member.

[0021] The first limiting member is arranged between the outer wall of the first rod and the inner wall of the guiding cavity. Along the axis of the second rod, one end of the first limiting member close to the rolling component is spaced from the rolling component.

[0022] Optionally, the actuator further includes a second limiting member.

[0023] The second limiting member is arranged between the outer wall of the first rod and the inner wall of the guiding cavity. Along the axis of the second rod, the other end of the first limiting member close to the rolling component is spaced from the rolling component.

[0024] Optionally, the outer wall of the first rod is provided with a first connecting portion.

[0025] The first limiting member is connected to the first connecting portion.

[0026] Optionally, the inner wall of the guiding cavity is provided with a second connecting portion.

[0027] The second limiting member is connected to the second connecting portion.

[0028] Optionally, a first limiting groove is provided along the circumferential direction of the first rod at the first connecting portion, and the first limiting member is embedded in the first limiting groove.

[0029] Optionally, a second limiting groove is provided along the circumferential direction of the second rod at the second connecting portion, and the second limiting member is embedded in the second limiting groove.

[0030] Optionally, the first limiting member and / or the second limiting member is an elastic member.

[0031] Optionally, the first limiting member and / or the second limiting member is a circlip limiting member.

[0032] Optionally, the circlip limiting member is provided with a clamping notch.

[0033] Optionally, the axial length of the sliding groove is greater than the movement stroke between the first rod and the second rod.

[0034] Optionally, one of the first assembly and the second assembly is adapted to connect to a wheel assembly, and the other of the first assembly and the second assembly is adapted to connect to a frame assembly.

[0035] Optionally, the first assembly further includes a housing;

[0036] At least a part of the first rod is disposed in the housing, and the first rod is fixedly connected to the housing.

[0037] Optionally, the first assembly further includes a first magnetic member, and the second assembly further includes a second magnetic member;

[0038] The first magnetic member is fixed to the inner wall of the housing, the second magnetic member is sleeved on the outer wall of the second rod, and the first magnetic member is disposed close to the second magnetic member.

[0039] In a second aspect, an embodiment of the present invention further provides a suspension assembly, including the actuator according to any one of the above.

[0040] In a third aspect, an embodiment of the present invention further provides a vehicle, including the actuator or the suspension assembly according to any one of the above.

[0041] The actuator provided by the embodiment of the present utility model includes a first component, a second component, and a rolling component. The first component and the second component can move relative to each other along the axial direction, that is, one of them is a stator component and the other is a rotor component. The first component includes a first rod, and the second component includes a second rod. A guiding cavity is axially arranged on the second rod, and the first rod moves relative to the axial direction of the guiding cavity. The rolling component is arranged between the guiding cavity and the first rod, and the rolling component is in rolling contact with the guiding cavity and in rolling contact with the first rod. Therefore, a rolling component is arranged between the first rod and the second rod, and the relative movement of the first component relative to the second component along the axial direction of the actuator is realized in the form of rolling friction. Compared with the conventional technology that realizes the movement of the rotor component relative to the stator component through sliding friction contact, the rolling friction method can obtain a lower friction coefficient under the same working conditions, reduce the friction resistance between the rolling component and the first component, and between the rolling component and the second sub-component, and improve the power output performance of the actuator. In addition, due to the reduction of the friction resistance, the wear between parts can be reduced, and the service life of the actuator can be prolonged.

[0042] The above description is only an overview of the technical solution of the present utility model. In order to be able to understand the technical means of the present utility model more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present utility model more obvious and understandable, the following specifically gives the specific embodiments of the present utility model. Brief Description of the Drawings

[0043] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0044] Figure 1 is a schematic structural diagram of the actuator provided by the embodiment of the present utility model;

[0045] Figure 2 is in the embodiment of the present utility model Figure 1 is a schematic cross-sectional view along the A-A direction;

[0046] Figure 3 is a schematic structural diagram of the first rod in the embodiment of the present utility model;

[0047] Figure 4 is in the embodiment of the present utility model Figure 3 is a schematic cross-sectional view along the B-B direction;

[0048] Figure 5 is a schematic assembly structure diagram of the first rod and the rolling bearing in the embodiment of the present utility model;

[0049] Figure 6 is another schematic assembly structure diagram of the first rod and the rolling bearing in the embodiment of the present utility model.

[0050] Description of reference numerals:

[0051] 1-first component, 11-first rod, 111-first slide groove, 112-first limiting groove, 113-flange, 1131-connecting hole, 1132-stepped mating surface, 12-housing, 121-installation cavity, 122-second opening, 123-third opening, 13-first magnetic member, 14-fork arm, 2-second component, 21-second rod, 211-guide cavity, 212-first opening, 213-second limiting groove, 22-second magnetic member, 3-rolling component, 31-retaining frame, 311-through hole, 32-rolling body, 41-first limiting member, 411-clamping notch, 42-second limiting member, 5-sliding bearing. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0053] The terms "first", "second", etc. in the specification and claims of the present utility model are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the utility model can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0054] The actuator, suspension assembly and vehicle provided by the embodiments of the utility model are described in detail below with reference to the accompanying drawings through specific embodiments and their application scenarios.

[0055] Reference Figure 1 and Figure 2, an embodiment of the present utility model provides an actuator, which includes a first component 1 and a second component 2 that can move relatively along the axis of the actuator. The first component 1 includes a first rod 11, and the second component 2 includes a second rod 21. A guiding cavity 211 is axially provided in the second rod 21 along the axis of the actuator, and the first rod 11 moves relatively along the axis of the guiding cavity; a rolling component 3 is arranged between the guiding cavity 211 and the first rod 11. The rolling component 3 is in rolling contact with the guiding cavity 211 and is also in rolling contact with the first rod 11.

[0056] Specifically, as Figure 1 and Figure 2 shown, the actuator provided by the embodiment of the present utility model includes a first component 1, a second component 2 and a rolling component 3. One of the first component 1 and the second component 2 is a stator component, and the other is a rotor component. In this embodiment, the first component 1 is set as the rotor component, and the second component 2 is set as the stator component. The first component 1 can move relatively along the Z direction relative to the second component 2 under the push of electromagnetic force. The rolling component 3 is arranged between the first component 1 and the second component 2. During the movement of the first component 1, the rolling component 3 is in rolling contact with the first component 1, and the rolling component 3 is also in rolling contact with the second component 2. The first component 1 includes a first rod 11, the second component 2 includes a second rod 21, and the second rod 21 is also called the central rod. A guiding cavity 211 is axially provided, and one end of the second rod 21 is provided with a first opening 212. In this embodiment, the first opening 212 is arranged at the lower end of the second rod 21. The first rod 11 is also called the guiding rod and is at least partially located at the lower end of the second rod 21. The rolling component 3 is arranged between the first rod 11 and the guiding cavity 211. Pushed by electromagnetic force, the first rod 11 moves relatively along the Z direction relative to the second rod 21. The rolling component 3 is in rolling contact with the first rod 11 and also in rolling contact with the second rod 21. It should be noted that during the movement of the first rod 11, the rolling component 3 will also be driven to move to a small extent along the Z direction. By arranging the rolling component 3 between the first rod 11 and the second rod 21, the frictional resistance is reduced, and the relative movement of the first component 1 relative to the second component 2 is realized in the form of rolling friction, reducing the frictional stress during the movement. On the one hand, the rolling component 3 is arranged between the first component 1 and the second component 2 as a supporting structure, and on the other hand, the relative movement of the first component 1 relative to the second component 2 is realized. The rolling component 3 can adopt bearings, bushings and other connecting devices. In this embodiment, a rolling bearing is adopted. The rolling component 3 includes but is not limited to ball bearings, tapered roller bearings, cylindrical roller bearings, needle roller bearings. Those skilled in the art can adopt different types of rolling components according to different power requirements and motor structures.

[0057] By using the actuator provided by the embodiment of the present utility model, a rolling component is arranged between the guiding cavities of the first rod and the second rod. In a rolling contact manner, the movement of the first component relative to the second component is realized, the frictional resistance between the first component and the second component is reduced, and the power output performance of the actuator is improved. In addition, since the frictional resistance is reduced, the wear between parts can be reduced, and the service life of the actuator can be prolonged.

[0058] Optionally, referring to Figure 2 , the rolling component 3 is arranged between the outer wall of the first rod 11 and the inner wall of the guiding cavity 211.

[0059] Specifically, as shown in Figure 2 , the rolling component 3 is arranged between the outer wall of the first rod 11 and the inner wall of the guiding cavity 211. When the first rod 11 moves axially in the guiding cavity 211, the rolling component 3 makes rolling contact with the outer wall of the first rod 11 and the inner wall of the guiding cavity 211. During the movement of the rolling component 3, it is constrained between the outer wall of the first rod 11 and the inner wall of the guiding cavity 211.

[0060] Optionally, referring to Figure 5 and Figure 6 , the rolling component 3 includes a cage 31 and rolling elements 32. The cage 31 is sleeved between the outer wall of the first rod 11 and the inner wall of the guiding cavity 211. The cage 31 is provided with through holes 311. At least part of the rolling elements 32 are arranged in the through holes 311. The through holes 311 are used to limit the rolling elements 32 between the outer wall of the first rod 11 and the inner wall of the guiding cavity 211.

[0061] Specifically, as shown in Figure 5 and Figure 6 , the cage 31 is annular and is sleeved between the outer wall of the first rod 11 and the inner wall of the guiding cavity 211. The cage 31 has a certain rigidity. Through holes 311 are radially formed in the cage 31. At least part of the rolling elements 32 are arranged in the through holes 311. The rolling elements 32 can rotate in the through holes 311 while being fixed and limited by the through holes 311. That is, the through holes 311 limit the rolling elements 32 between the outer wall of the first rod 11 and the inner wall of the guiding cavity 211 without slipping. According to different forms of the rolling component 3, the rolling elements 32 can be set as spheres, cones, cylinders or needles. It is necessary to ensure that the contact surfaces of the rolling elements 32 with the outer wall of the first rod 11 and the inner wall of the guiding cavity 211 are curved surfaces to achieve rolling connection and reduce the friction coefficient and frictional resistance.

[0062] Optionally, referring to Figure 5 and Figure 6, the rolling element 32 is in rolling contact with the guiding cavity 211, and the rolling element 32 is in rolling contact with the first rod 11.

[0063] Specifically, as Figure 5 and Figure 6 shown, under the limiting action of the through hole 311, rolling contact occurs between one side of the rolling element 32 and the outer wall of the first rod 11 to achieve rolling friction, and rolling contact occurs between the other side of the rolling element 32 and the inner wall of the guiding cavity 211 to achieve rolling friction.

[0064] Optionally, referring to Figure 5 , at least one of the outer wall of the first rod 11 and the inner wall of the guiding cavity 211 is provided with a chute along the axial direction; the rolling element 32 is rollingly connected in the chute.

[0065] Specifically, as Figure 5 shown, the outer wall of the first rod 11 and / or the inner wall of the guiding cavity 211 is provided with a chute along the axial direction. In this embodiment, in order to limit the first rod 11 to move only along the axial direction Z relative to the second rod 21 and avoid relative rotation between the first rod 11 and the second rod 21 along the circumferential direction, which affects the adjustment function of the actuator. A first chute 111 is provided along the axial direction on the outer wall of the first rod 11, and a second chute is provided on the inner wall of the guiding cavity 211. It should be noted that the second chute is not shown in the figure. The first chute 111 and the second chute can be rectangular chutes or arc chutes. One side of the rolling element 32 is rollingly connected in the first chute 111, and the other side is rollingly connected in the second chute. When the first rod moves along the Z direction, the rolling element 32 moves along the Z direction relative to the first rod 11 and the second rod 21. Under the limiting action of the chute, no relative rotation occurs between the rolling element 32 and the first rod 11, and between the rolling element 32 and the second rod 21 along the circumferential direction. If a chute is provided only on the outer wall of the first rod 11 or on the inner wall of the guiding cavity 211, the rotation of the first rod 11 relative to the second rod 21 along the circumferential direction cannot be completely avoided.

[0066] As Figure 6 shown, in another embodiment, the first rod 11 is an optical axis, and no chute is provided on its surface. During the movement of the first rod 11, the rolling element 32 is in point contact with the first rod 11. Under the action of the same lateral force, the contact stress generated by this point contact will be greater than the stress generated by the line contact in the previous embodiment. And it is impossible to limit the rolling element 32 to move only along the Z direction without rotating relative to the first rod 11 or the second rod 21 along the circumferential direction. However, considering the processing cost, this method can be used in occasions where the dynamic performance requirements are not high.

[0067] Optionally, referring to Figure 5, at least one of the outer wall of the first rod member 11 and the inner wall of the guiding cavity 211 is provided with a plurality of the sliding grooves distributed circumferentially.

[0068] Specifically, the number of the sliding grooves is a plurality, and the plurality of sliding grooves are distributed circumferentially along the outer wall of the first rod member 11 or the inner wall of the guiding cavity 211. Therefore, a column of rolling elements 32 distributed along the Z direction can be correspondingly arranged at each sliding groove. As Figure 5 shown, a plurality of first sliding grooves 111 are distributed circumferentially along the first rod member 11, and a plurality of columns of rolling elements 32 distributed along the Z direction are correspondingly arranged, effectively reducing the friction stress between the rolling elements 32 and the first rod member 11, and between the rolling elements 32 and the guiding cavity 211.

[0069] Optionally, referring to Figure 5 , the plurality of the sliding grooves are arranged at equal intervals.

[0070] Specifically, a plurality of first sliding grooves 111 are arranged at equal intervals circumferentially along the outer wall of the first rod member 11, so that the friction stress between the rolling elements 32 and the first rod member 11, and between the rolling elements 32 and the guiding cavity 211 is evenly distributed circumferentially, the force is more balanced, and it is beneficial to the structural stability of the rolling assembly 3.

[0071] Optionally, referring to Figure 5 , the contact surface shapes of the rolling elements 32 and the sliding grooves are the same, both being curved surfaces.

[0072] Specifically, as Figure 5 shown, in an embodiment, the contact surface shapes of the rolling elements 32 and the sliding grooves are the same, that is, the outer contact surface of the rolling elements 32, the surface of the first sliding grooves 111, and the surface of the second sliding grooves are all curved surfaces. Due to the need of rolling friction, the outer contact surface of the rolling elements 32 needs to be set as a curved surface, and the surface of the matching sliding grooves is also set as a curved surface, which can increase the contact area with the rolling elements 32. The rolling elements 32 and the sliding grooves are in line contact, which can reduce the contact stress at the contact part of the rolling elements 32. Within the allowable stress range, the wear between parts is significantly reduced, and the service life of the parts is further extended.

[0073] Optionally, referring to Figure 5 , the rolling elements 32 are spherical bodies.

[0074] Optionally, the radius of curvature of the contact surface between the sliding groove and the rolling element 32 is greater than or equal to the radius of the rolling element 32.

[0075] Specifically, as Figure 5As shown, the rolling element 32 is a sphere, that is, the rolling assembly 3 is set as a ball bearing. The rolling element 32 can rotate in any direction within the through hole 311. The diameter of the through hole 311 is set to be smaller than the diameter of the rolling element 32, so that the rolling element 32 is partially embedded in the through hole 311 without slipping off. Taking the first chute 111 as an example, when the first chute 111 is an arc chute, the arc curvature radius thereof should be slightly larger than the radius of the rolling element 32. While limiting the rolling element 32 from having excessive circumferential deflection, there is a certain assembly gap between the first chute 111 and the rolling element 32. Or the curvature radius of the first chute 111 is set to be equal to the radius of the rolling element 32.

[0076] Optionally, referring to Figure 2 , it further includes a first limiting member 41; the first limiting member 41 is disposed between the outer wall of the first rod member 11 and the inner wall of the guiding cavity 211. Along the axial direction of the second rod member 21, one end of the first limiting member 41 close to the rolling assembly 3 is spaced apart from the rolling assembly 3.

[0077] Specifically, as Figure 2 shown, the first limiting member 41 is located between the outer wall of the first rod member 11 and the inner wall of the guiding cavity 211. In some embodiments, when the first limiting member 41 is connected to the outer wall of the first rod member 11, its setting position is close to the upper end of the first rod member 11. When the first limiting member 41 is connected to the inner wall of the guiding cavity 211, its setting position should be lower than the highest point of the movement stroke of the first rod member 11, otherwise the limiting effect will be lost. Along the axial direction, the first limiting member 41 is spaced apart from the rolling assembly 3. During the movement process, the first limiting member 41 is always located at the upper end of the rolling assembly 3, and the first limiting member 41 is always located between the contact surfaces of the outer wall of the first rod member 11 and the inner wall of the guiding cavity 211, for limiting the highest point of the movement of the rolling assembly 3, and avoiding that the movement position of the rolling assembly 3 is too high and exceeds the upper end of the first rod member 11 and loses its function.

[0078] Optionally, referring to Figure 2 , it further includes a second limiting member 42; the second limiting member 42 is disposed between the outer wall of the first rod member 11 and the inner wall of the guiding cavity 211. Along the axial direction of the second rod member 21, the other end of the first limiting member 41 close to the rolling assembly 3 is spaced apart from the rolling assembly 3.

[0079] Specifically, as Figure 2As shown, the second limiting member 42 is located between the outer wall of the first rod member 11 and the inner wall of the guiding cavity 211. The second limiting member 42 can be connected to the outer wall of the first rod member 11 or to the inner wall of the guiding cavity 211. Axially, the second limiting member 42 is arranged at an interval from the rolling assembly 3. During the movement, the second limiting member 42 is always located at the lower end of the rolling assembly 3, and the second limiting member 42 is always located between the contact surfaces of the outer wall of the first rod member 11 and the inner wall of the guiding cavity 211, for limiting the lowest point of the movement of the rolling assembly 3 and preventing it from exceeding the movement stroke.

[0080] Optionally, referring to Figure 2 , a first connecting portion is provided on the outer wall of the first rod member 11; the first limiting member 41 is connected to the first connecting portion.

[0081] Specifically, as Figure 2 shown, the first limiting member 41 of this embodiment is connected to the outer wall of the first rod member 11 through the first connecting portion. The form of the first connecting portion includes but is not limited to threaded fasteners or limiting grooves, that is, the first limiting member 41 is screwed to the outer wall of the first rod member 11 through threaded fasteners, or the first limiting member 41 is partially embedded in the limiting groove on the outer wall of the first rod member 11.

[0082] Optionally, referring to Figure 2 , a second connecting portion is provided on the inner wall of the guiding cavity 211; the second limiting member 42 is connected to the second connecting portion.

[0083] Specifically, as Figure 2 shown, the second limiting member 42 of this embodiment is connected to the inner wall of the guiding cavity 211 through the second connecting portion. Similarly, the form of the second connecting portion includes but is not limited to threaded fasteners or limiting grooves, that is, the second limiting member 42 is screwed to the inner wall of the guiding cavity 211 through threaded fasteners, or the second limiting member 42 is partially embedded in the limiting groove on the inner wall of the guiding cavity 211.

[0084] Optionally, referring to Figures 3 to 5 , a first limiting groove 112 is provided along the circumferential direction of the first rod member 11 at the first connecting portion, and the first limiting member 41 is embedded in the first limiting groove 112.

[0085] Specifically, as Figures 3 to 5 shown, the first connecting portion of this embodiment is in the form of a limiting groove. The first limiting groove 112 is annular and is arranged along the circumferential direction at a position close to the upper end of the outer wall of the first rod member 11. The first limiting member 41 is also annular, and a part of it is embedded in the first limiting groove 112 to form an effective fixing structure.

[0086] Optionally, referring to Figure 2A second limiting groove 213 is provided at the second connecting portion along the circumference of the second rod 21 , and the second limiting member 42 is embedded in the second limiting groove 213 .

[0087] Specifically, if Figure 2 As shown, the second connection portion is also configured as a limiting groove, and the second limiting groove 213 is annular and circumferentially arranged on the inner wall of the guide cavity 211 near the lower end. The second limiting member 42 is also annular, and part of it is embedded in the second limiting groove 213 to form an effective fixing structure.

[0088] Optionally, refer to Figure 5 The first limiting member 41 and / or the second limiting member 42 is an elastic member.

[0089] Optionally, the first limiting member 41 and / or the second limiting member 42 is a retaining spring limiting member.

[0090] Specifically, at least one of the first limiting member 41 and the second limiting member 42 is an elastic member, including but not limited to a retaining spring or an elastic retaining ring, which is used to hold the limiting groove tightly through elastic action to strengthen the fixation. Figure 2 As shown, the first limiting member 41 of this embodiment is an annular retaining spring limiting member, which relies on its own elasticity to embed into the first limiting groove 112 while holding the outer wall of the first rod 11 to achieve the limiting effect on the rolling assembly 3.

[0091] Optionally, refer to Figure 5 The retaining spring limiter is provided with a retaining notch 411.

[0092] Specifically, the first limiting member 41 and / or the second limiting member 42 is provided with a snap-fitting notch, such as Figure 5 As shown, the retaining spring limiter is provided with a snap-fitting notch 411. Before assembly, the operator pries open the snap-fitting notch 411 and aligns the first retaining member 41 with the first retaining groove 112. The first retaining member 41 shrinks due to its own elasticity and the snap-fitting notch 411 shrinks, so that the retaining spring limiter is embedded in the first retaining groove 112 while holding the outer wall of the first rod 11 tightly.

[0093] Optionally, an axial length of the sliding groove is greater than a movement stroke of the first rod 11 relative to the second rod 21 .

[0094] Specifically, the axial length of the slide groove should be greater than the movement stroke of the first rod 11 relative to the second rod 21. In other words, when the first rod 11 moves downward along the Z direction, the lower end of the second rod 21 should not be higher than the uppermost end of the first slide groove 111; when the first rod 11 moves upward along the Z direction, the upper end of the second rod 21 should not be lower than the lowermost end of the first slide groove 111. That is, the axial length of the slide groove should be greater than the design stroke of the actuator.

[0095] Optionally, one of the first component 1 and the second component 2 is adapted to be connected to a wheel assembly, and the other of the first component 1 and the second component 2 is adapted to be connected to a frame assembly.

[0096] Optionally, in this embodiment, the first component 1 is set as a mover component, and the second component 2 is set as a stator component. The mover component is adapted to be connected to the wheel assembly, and the stator component is adapted to be connected to the frame assembly. By the movement of the mover component relative to the stator component, the vehicle body height is adjusted according to the road conditions to maintain the stability and balance of the vehicle body.

[0097] Optionally, referring to Figure 2 , the first component 1 further includes a housing 12; at least a part of the first rod 11 is disposed inside the housing 12, and the first rod 11 is fixedly connected to the housing 12.

[0098] Specifically, as shown in Figure 2 , the housing 12 has an installation cavity 121 inside. Along the Z direction, the lower end of the housing 12 has a second opening 122, and the upper end of the housing 12 has a third opening 123. The first rod 11 extends into the installation cavity 121 from the second opening 122 and is fixedly connected to the housing 12. The upper end of the second rod 21 is located outside the installation cavity 121, and the upper end of the second rod 21 extends into the installation cavity 121 from the third opening 123 and is slidably connected to the housing 12. The housing 12 reciprocally slides along the Z direction relative to the second rod 21 driven by the first rod 11. A sliding bearing 5 is disposed between the inner wall of the housing 12 and the outer wall of the second rod 21. When the first rod 11 extends into the housing 12, it also extends into the guiding cavity 211 of the second rod 21. The housing 12 is in a cylindrical shape. During the assembly process, the first rod 11, the second rod 21, and the housing 12 are kept coaxially arranged.

[0099] Optionally, referring to Figure 2 , the first component 1 further includes a first magnetic member 13, and the second component 2 further includes a second magnetic member 22; the first magnetic member 13 is fixed to the inner wall of the housing 12, the second magnetic member 22 is sleeved on the outer wall of the second rod 21, and the first magnetic member 13 is disposed close to the second magnetic member 22.

[0100] Specifically, as shown in Figure 2 , the second magnetic member 22 can generate a magnetic field during the energization process. In this embodiment, the second magnetic member 22 adopts a coil and winding and is sleeved on the outer wall of the second rod 21. The first magnetic member 13 in this embodiment adopts a permanent magnet and is fixed to the inner wall of the installation cavity 121 of the housing 12. The distance between the maximum outer diameter of the coil and winding of the second magnetic member 22 and the minimum inner diameter of the first magnetic member 13 maintains a certain gap along the axial direction, and this gap value is from 0.5 mm to 1.5 mm.

[0101] Specifically, as Figure 2 shown, during the working process, the coil and the winding are energized, and the continuous change of the current causes the change of the magnetic field of the coil. Since the change rate of the current is proportional to the change rate of the magnetic field, an induced electromotive force will be generated. According to the principle of electromagnetic induction, the induced electromotive force will interact with the first magnetic member 13, i.e., the permanent magnet, in the first component 1, thereby generating a torque to drive the first component 1 to move relative to the second component 2. During the movement process, the rolling component 3 is driven and makes rolling contact with the first rod 11 and the second rod 21, which offsets to a certain extent the magnetic deviation force caused by the uneven air gap between the coil and the first magnetic member 13.

[0102] In addition, as Figure 3 and Figure 4 shown, a flange 113 is connected to the lower end of the first rod 11, and the upper edge of the flange 113 is fixedly connected to the housing 12. Therefore, during the assembly process, a high perpendicularity between the first rod 11 and the flange 113 needs to be maintained to ensure a high perpendicularity between the first rod 11 and the housing 12. The first rod 11 is threadedly connected to the fork arm 14 through the flange 113. The flange 113 is provided with a connection hole 1131 for passing through a threaded fastener to connect with the fork arm 14. The lower part of the flange 113 has a stepped mating surface 1132 for accurate installation and mating with the fork arm 14. The lower end of the fork arm 14 is fixedly connected to the wheel assembly, which transmits the bumpy condition of the wheel on the road surface to the suspension system in a certain proportion, and suppresses vibration through the adjustment of the actuator to keep the vehicle body stable.

[0103] The embodiment of the present utility model also provides a suspension assembly, including the actuator described in any one of the above embodiments. The suspension assembly usually further includes a suspension spring, an anti-roll bar, a suspension sub-beam, a control arm, a steering knuckle and a connecting rod. The suspension assembly is connected between the vehicle frame and the wheel. It can achieve full-automatic real-time adjustment, with fast response time, large thrust, high response frequency, and attenuate the vibration of the vehicle body through the thrust of the motor. Due to the setting of the rolling component, the frictional resistance between the mover component and the stator component is reduced, and the overall dynamic performance of the suspension assembly is improved.

[0104] The embodiment of the present utility model also provides a vehicle, including the actuator or the suspension assembly described in any one of the above embodiments. The vehicle can be a fuel vehicle, a plug-in hybrid vehicle or an electric vehicle. By improving the dynamic performance of the actuator or the suspension assembly, the driving stability of the vehicle is improved, and the comfort of the passengers is improved.

[0105] It should be noted that, in this text, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the presence of additional identical elements in the process, method, article or device including such element.

[0106] The embodiments of the present utility model have been described above in conjunction with the accompanying drawings. However, the present utility model is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present utility model, those of ordinary skill in the art can also make many forms without departing from the purpose of the present utility model and the scope protected by the claims, and all of them fall within the protection scope of the present utility model.

Claims

1. An actuator, characterized in that, Comprising: A first component (1) and a second component (2) that can move relative to each other axially along the actuator. The first component (1) includes a first rod (11), and the second component (2) includes a second rod (21). A guiding cavity (211) is axially provided in the second rod (21) along the actuator, and the first rod (11) moves relative to the other axially along the guiding cavity. A rolling component (3) is arranged between the guiding cavity (211) and the first rod (11). The rolling component (3) is in rolling contact with the guiding cavity (211) and is also in rolling contact with the first rod (11).

2. The actuator according to claim 1, wherein, The rolling component (3) is arranged between the outer wall of the first rod (11) and the inner wall of the guiding cavity (211).

3. The actuator according to claim 2, characterized in that, The rolling component (3) includes a cage (31) and rolling elements (32). The cage (31) is sleeved between the outer wall of the first rod (11) and the inner wall of the guiding cavity (211). The cage (31) is provided with through holes (311), and at least part of the rolling elements (32) are arranged in the through holes (311). The through holes (311) are used to confine the rolling elements (32) between the outer wall of the first rod (11) and the inner wall of the guiding cavity (211).

4. The actuator according to claim 3, characterized in that, The rolling elements (32) are in rolling contact with the guiding cavity (211) and are also in rolling contact with the first rod (11).

5. The actuator according to claim 3, wherein, At least one of the outer wall of the first rod (11) and the inner wall of the guiding cavity (211) is axially provided with a sliding groove. The rolling elements (32) are rollingly connected in the sliding groove.

6. The actuator according to claim 5, characterized in that, At least one of the outer wall of the first rod (11) and the inner wall of the guiding cavity (211) is provided with a plurality of sliding grooves distributed circumferentially.

7. The actuator according to claim 6, wherein The plurality of sliding grooves are arranged at equal intervals.

8. The actuator according to claim 5, characterized in that, The contact surface shapes of the rolling elements (32) and the sliding grooves are the same, both being curved surfaces.

9. The actuator according to claim 8, characterized in that, The rolling elements (32) are spheres.

10. The actuator according to claim 9, characterized in that, The radius of curvature of the contact surface between the sliding groove and the rolling element (32) is greater than or equal to the radius of the rolling element (32).

11. The actuator according to claim 2, characterized in that, The actuator further includes a first limiting member (41). The first limiting member (41) is arranged between the outer wall of the first rod (11) and the inner wall of the guiding cavity (211). Along the axis of the second rod (21), the first limiting member (41) is close to one end of the rolling component (3) and is spaced from the rolling component (3).

12. The actuator according to claim 11, characterized in that, The actuator further includes a second limiting member (42). The second limiting member (42) is arranged between the outer wall of the first rod (11) and the inner wall of the guiding cavity (211). Along the axis of the second rod (21), the first limiting member (41) is close to the other end of the rolling component (3) and is spaced from the rolling component (3).

13. The actuator according to claim 11, characterized in that, The outer wall of the first rod (11) is provided with a first connecting portion. The first limiting member (41) is connected to the first connecting portion.

14. The actuator according to claim 12, characterized in that, The inner wall of the guiding cavity (211) is provided with a second connecting portion. The second limiting member (42) is connected to the second connecting portion.

15. The actuator according to claim 13, wherein, A first limiting groove (112) is provided along the circumferential direction of the first rod member (11) at the first connecting portion, and the first limiting member (41) is embedded in the first limiting groove (112).

16. The actuator according to claim 14, wherein A second limiting groove (213) is provided along the circumferential direction of the second rod member (21) at the second connecting portion, and the second limiting member (42) is embedded in the second limiting groove (213).

17. The actuator according to claim 16, characterized in that, The first limiting member (41) and / or the second limiting member (42) is an elastic member.

18. The actuator according to claim 17, wherein, The first limiting member (41) and / or the second limiting member (42) is a circlip limiting member.

19. The actuator according to claim 18, characterized in that, The circlip limiting member is provided with a clamping notch (411).

20. The actuator according to claim 5, characterized in that, The axial length of the sliding groove is greater than the movement stroke between the first rod member (11) and the second rod member (21).

21. The actuator according to claim 1, wherein, One of the first assembly (1) and the second assembly (2) is adapted to be connected to a wheel assembly, and the other of the first assembly (1) and the second assembly (2) is adapted to be connected to a frame assembly.

22. The actuator according to claim 1, characterized in that, The first assembly (1) further includes a housing (12); At least a part of the first rod member (11) is disposed in the housing (12), and the first rod member (11) is fixedly connected to the housing (12).

23. The actuator according to claim 22, characterized in that, The first assembly (1) further includes a first magnetic member (13), and the second assembly (2) further includes a second magnetic member (22); The first magnetic member (13) is fixed to the inner wall of the housing (12), the second magnetic member (22) is sleeved on the outer wall of the second rod member (21), and the first magnetic member (13) is disposed close to the second magnetic member (22).

24. A suspension assembly, characterized in that, An actuator according to any one of claims 1 to 23.

25. A vehicle, characterized in that, An actuator according to any one of claims 1 to 23 or a suspension assembly according to claim 24.

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