Vehicle suspension actuators and vehicles

Abstract

The present application relates to a vehicle suspension actuator and a vehicle, wherein the vehicle suspension actuator comprises a buffer assembly, a screw rod, a piston rod and a housing. One end of the buffer assembly is connected to the screw rod, and the other end is connected to the piston rod. The screw rod, the piston rod and the buffer assembly are all arranged in the housing. Thus, the buffer assembly can buffer the high-frequency vibration between the piston rod and the screw rod, thereby preventing the piston rod and the screw rod from being damaged by the high-frequency vibration excitation of the road surface.

Description

Technical Field

[0001] The present application relates to the field of buffer technology, and in particular to a vehicle suspension actuator and a vehicle. Background Art

[0002] In the related art, the vehicle suspension actuator can adjust the stiffness and damping of the suspension system by changing the air pressure of the air spring or the damping force of the shock absorber to quickly respond to changes in driving conditions. However, when the vehicle vibrates at high frequencies due to road conditions, the transmission mechanisms such as the screw rod and piston rod in the vehicle suspension actuator are easily impacted by the high-frequency vibration, causing the transmission mechanism to be damaged due to vibration impact. Summary of the invention

[0003] The embodiments of the present application provide a vehicle suspension actuator and a vehicle, which use a buffer component to buffer the high-frequency vibration between the lead screw and the piston rod, thereby avoiding impact damage to the lead screw caused by high-frequency vibration excitation of the road surface, thereby improving the safety of the vehicle.

[0004] In order to achieve the above object, according to a first aspect of the present application, a vehicle suspension actuator is provided, comprising:

[0005] Screw rod;

[0006] Piston rod;

[0007] A buffer assembly, one end of which is connected to the screw rod, and the other end of which is connected to the piston rod;

[0008] The screw rod, the piston rod and the buffer assembly are all arranged in the housing.

[0009] Optionally, a driving member is installed in the housing, and the driving member is connected to the screw rod to drive the screw rod to move linearly.

[0010] Optionally, the driving member comprises:

[0011] A stator, fixedly installed in the housing;

[0012] A rotor, rotatably connected to the stator;

[0013] A ball nut connected to the rotor, wherein the ball nut rotates with the rotor;

[0014] Wherein, the screw rod is inserted into the ball nut.

[0015] Optionally, the driving member further includes:

[0016] A drive shaft is fixed in the rotor, and the axis of the drive shaft coincides with the axis of the rotor;

[0017] Wherein, the driving shaft is connected to the ball nut.

[0018] Optionally, the drive shaft is formed with a receiving groove, the notch of the receiving groove faces the ball nut, and one end of the screw rod away from the buffer assembly passes through the ball nut and is inserted into the receiving groove.

[0019] Optionally, one of the ball nut and the drive shaft is configured with a slot, and the other is configured with a clamping portion, and the clamping portion is clamped in the slot.

[0020] Optionally, a limiting member is installed in the housing, and the limiting member abuts against a side of the ball nut away from the driving shaft.

[0021] Optionally, a first buffer is provided in the shell, the first buffer is connected to the piston rod and is located between the buffer assembly and the bottom of the shell.

[0022] Optionally, the first buffer member comprises a flexible block;

[0023] And / or, the first buffer member includes a first elastic member, the first elastic member is sleeved on the piston rod, and two ends of the first elastic member are respectively in contact with the buffer assembly and the bottom of the shell.

[0024] Optionally, a buffer cavity is constructed in the buffer assembly, and a second buffer member is arranged in the buffer cavity at intervals, one end of the second buffer member abuts against the cavity wall of the buffer cavity close to the screw rod, and the other end abuts against the piston rod.

[0025] Optionally, the buffer cavity has a first opening, a first connecting member is disposed in the buffer cavity, the first connecting member includes a connecting section passing through the buffer cavity from the first opening, and the connecting section is connected to the screw rod.

[0026] Optionally, the first connecting member also includes a fixed section arranged in the buffer cavity, and the fixed section is connected to the connecting section, wherein the aperture of the buffer cavity is D1, the diameter of the first opening is D2, the diameter of the fixed section is D3, and the diameter of the connecting section is D4, satisfying: D4≤D2<D3≤D1.

[0027] Optionally, a third buffer member and a second connecting member are further provided in the buffer chamber, the third buffer member is spaced apart from the second buffer member, the third buffer member is configured with a through hole, the second connecting member includes a mounting portion and a transition portion that are connected to each other, the two ends of the mounting portion are respectively abutted against the second buffer member and the third buffer member, the transition portion is passed through the through hole, and the end of the transition portion away from the mounting portion is connected to the piston rod.

[0028] Optionally, the buffer cavity further has a second opening, the transition portion is integrally formed with the mounting portion, the transition portion passes through the buffer cavity from the second opening, and is connected to the piston rod.

[0029] Optionally, the diameter of the buffer cavity is D1, the aperture of the second opening is D5, the diameter of the mounting portion is D6, and the diameter of the transition portion is D7, satisfying: D7≤D5<D6≤D1.

[0030] Optionally, the buffer component further includes:

[0031] tray;

[0032] A cover plate is connected to a side of the tray facing the screw rod and is enclosed with the tray to form the buffer cavity, wherein the first opening is formed on the cover plate, and the second opening is constructed on a side of the tray facing the piston rod.

[0033] Optionally, a connecting portion is configured at one end of the screw rod toward the cover plate, one of the cover plate and the connecting portion is configured with a positioning block, and the other is configured with a connecting notch, the connecting portion is clamped in the first opening, and the positioning block is clamped in the connecting notch.

[0034] Optionally, a rotation-stopping member is configured on the outer circumferential surface of the tray, a rotation-stopping groove extending along the first direction is configured in the shell, and the rotation-stopping member is clamped in the rotation-stopping groove.

[0035] Optionally, the second buffer member includes at least one of a flexible gasket, a second elastic member, and a gas sealed in the buffer cavity.

[0036] Optionally, the third buffer member includes at least one of a flexible gasket, a third elastic member, and a gas sealed in the buffer cavity.

[0037] Optionally, the vehicle suspension actuator further comprises:

[0038] A shock absorber, one end of which is inserted into the shell from the bottom of the shell, and the other end is located outside the shell;

[0039] The shock absorber is filled with magnetorheological fluid, the piston rod is inserted into the shock absorber and is connected to a coil, the coil has a powered state and a de-powered state, in the powered state, the damping value of the magnetorheological fluid is Z1, in the de-powered state, the damping value of the magnetorheological fluid is Z2, satisfying: Z1>Z2.

[0040] Optionally, the damping value of the magnetorheological fluid is positively correlated with the current value in the coil.

[0041] Optionally, a first abutment is constructed on the outer surface of the shell, a second abutment is constructed on the outer surface of the shock absorber, a fourth elastic member is outer-connected to the shell, one end of the fourth elastic member abuts against the first abutment, and the other end of the fourth elastic member extends to the shock absorber and abuts against the second abutment.

[0042] According to a second aspect of the present application, a vehicle is also provided, comprising the vehicle suspension actuator as described above.

[0043] The vehicle suspension actuator and the vehicle of the embodiment of the present application are provided with a buffer assembly between the screw rod and the piston rod. Thus, the high-frequency vibration between the piston rod and the screw rod can be buffered by the buffer assembly, thereby preventing the piston rod and the screw rod from being damaged by the high-frequency vibration excitation of the road surface.

[0044] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0046] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0047] Figure 1 is a schematic structural diagram of a vehicle suspension actuator provided in an exemplary embodiment of the present disclosure;

[0048] Figure 2 yes Figure 1 Sectional view of section AA;

[0049] Figure 3 yes Figure 2 A partial enlarged view of point B in the middle;

[0050] Figure 4 is a partial enlarged view of a buffer assembly provided in an exemplary embodiment of the present disclosure;

[0051] Figure 5 is a partial enlarged view of a buffer assembly provided in an exemplary embodiment of the present disclosure;

[0052] Figure 6 is a schematic structural diagram of a vehicle suspension actuator provided in an exemplary embodiment of the present disclosure;

[0053] Figure 7 yes Figure 6 Sectional view of the CC section;

[0054] Figure 8 is an exploded view of a buffer assembly provided in an exemplary embodiment of the present disclosure;

[0055] Fig. 9 is an exploded view of the connection between the drive shaft and the lead screw provided in an exemplary embodiment of the present disclosure.

[0056] Description of reference numerals:

[0057] 1. Buffer assembly; 11. First end; 12. Second end; 13. Buffer cavity; 14. Second buffer member; 15. Third buffer member; 151. Through hole; 16. First opening; 17. Second opening; 18. Tray; 181. Stop member; 19. Cover plate; 191. Positioning block;

[0058] 2. screw rod; 21. connecting part; 211. connecting notch;

[0059] 3. Piston rod;

[0060] 4. first connecting member; 41. connecting section; 42. fixing section;

[0061] 5. second connecting member; 51. mounting portion; 52. transition portion;

[0062] 6. housing; 61. driving member; 611. stator; 612. rotor; 613. ball nut; 614. driving shaft; 615. receiving groove; 616. clamping groove; 617. clamping part; 62. anti-rotation groove; 63. limiting member; 64. first buffer member; 65. first abutting member; 66. fourth elastic member;

[0063] 7. Shock absorber; 71. Coil; 72. Second abutment member. DETAILED DESCRIPTION

[0064] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0065] like Figures 1 to 9 As shown, an embodiment of the present application provides a vehicle suspension actuator. The vehicle suspension actuator includes a buffer assembly 1, a screw rod 2, a piston rod 3 and a housing 6. One end of the buffer assembly 1 is connected to the screw rod 2, and the other end is connected to the piston rod 3. The screw rod 2, the piston rod 3 and the buffer assembly 1 are all arranged in the housing 6.

[0066] In some embodiments, a buffer assembly 1 is provided between the screw rod 2 and the piston rod 3. Thus, the high-frequency vibration between the piston rod 3 and the screw rod 2 can be buffered by the buffer assembly 1, so as to avoid the piston rod 3 and the screw rod 2 being damaged by the high-frequency vibration excitation of the road surface.

[0067] Generally speaking, the screw rod 2 and the piston rod 3 are respectively located at the upper and lower sides of the buffer assembly 1. And the screw rod 2 and the piston rod 3 both extend along the height direction of the vehicle suspension actuator.

[0068] The screw rod 2 , the piston rod 3 and the buffer assembly 1 are all built into the housing 6 , so that the housing 6 can be used to provide protection and dustproof effects.

[0069] In some embodiments, a driving member 61 is installed in the housing 6 , and the driving member 61 is connected to the screw rod 2 to drive the screw rod 2 to move linearly.

[0070] It is understandable that the driving member 61 can drive the screw rod 2 to make a linear motion, so that the screw rod 2 drives the piston rod 3 to make a linear motion. The lower end of the screw rod 2 usually passes through the housing 6 from the lower end of the housing 6 and is connected to a connecting mechanism to connect to the vehicle through the connecting mechanism. Therefore, the height of the vehicle body can be quickly adjusted after the screw rod 2 drives the piston rod 3 to make a linear motion.

[0071] The driving member 61 can drive the screw rod 2 to move linearly in the direction of the piston rod 3, or can drive the screw rod 2 to move in the direction away from the piston rod 3. When the driving member 61 does not drive the screw rod 2 to move, the screw rod 2 and the piston rod 3 have almost no damping for the vehicle suspension actuator, and at this time, the damping force of the vehicle suspension actuator can reach 0 Newton. When the driving member 61 drives the screw rod 2 to move, the force can be transmitted to the screw rod 2, and the transmission of the screw rod 2 and the piston rod 3 will generate a damping force, thereby increasing the damping of the vehicle suspension actuator.

[0072] In some embodiments, Figure 2 and Figure 7 As shown, the driving member 61 includes a stator 611, a rotor 612 and a ball nut 613. The stator 611 is fixedly installed in the housing 6. The rotor 612 is rotatably connected in the stator 611. The ball nut 613 is connected to the rotor 612, and the ball nut 613 rotates with the rotor 612. Among them, the screw rod 2 is inserted into the ball nut 613.

[0073] It is understandable that the rotor 612 can drive the ball nut 613 to rotate through the cooperation between the stator 611 and the rotor 612. Since the screw rod 2 is inserted into the ball nut 613, the rotation of the ball nut 613 can drive the screw rod 2 to move.

[0074] The stator 611 is equipped with an excitation coil 71 winding, and the copper wire can generate an alternating induced electromotive force to act as a rotating magnetic field. The rotor 612 is equipped with magnetic poles arranged in pairs. The magnetic poles arranged in pairs can generate rotational motion under the influence of the rotating magnetic field. The rotor 612 can rotate clockwise or counterclockwise, driving the screw rod 2 to move linearly in the direction of the piston rod 3 or driving the screw rod 2 to move in a direction away from the piston rod 3.

[0075] In some embodiments, Figure 2 As shown, the driving member 61 further includes a driving shaft 614. The driving shaft 614 is fixed in the rotor 612, and the axis of the driving shaft 614 coincides with the axis of the rotor 612. The driving shaft 614 is connected to the ball nut 613.

[0076] The drive shaft 614 is directly mounted on the inner ring of the rotor 612 so that the drive shaft 614 can be driven to rotate when the rotor 612 rotates. When the axis of the drive shaft 614 coincides with the axis of the rotor 612, the rotor 612 will drive the drive shaft 614 to rotate coaxially, preventing the drive shaft 614 from rotating eccentrically.

[0077] Wherein, both ends of the driving shaft 614 may be sleeved with bearings, and the outer ring of the bearing is fixed in the housing 6 .

[0078] The end of the ball nut 613 away from the driving shaft 614 may also be sleeved with a bearing, and the outer ring of the bearing is fixed in the housing 6 .

[0079] In some embodiments, Figure 2 and Figure 7 As shown, the drive shaft 614 is formed with a receiving groove 615 , the notch of the receiving groove 615 faces the ball nut 613 , and one end of the screw rod 2 away from the buffer assembly 1 passes through the ball nut 613 and is inserted into the receiving groove 615 .

[0080] It is understandable that when the screw rod 2 moves linearly toward the driving shaft 614, the end of the screw rod 2 will gradually approach the driving shaft 614. The driving shaft 614 has a receiving groove 615 formed therein to receive the screw rod 2 to prevent the driving shaft 614 from interfering with the linear motion of the screw rod 2.

[0081] The groove depth of the receiving groove 615 formed in the drive shaft 614 may be greater than the stroke of the screw rod 2 to prevent the drive shaft 614 from interfering with the linear motion of the screw rod 2. In some embodiments, the groove depth of the receiving groove 615 formed in the drive shaft 614 may be less than the stroke of the screw rod 2, and the drive shaft 614 may be used to limit the maximum stroke of the screw rod 2.

[0082] In some embodiments, Fig. 9As shown, a clamping groove 616 is configured on one side of the ball nut 613 facing the driving shaft 614 , and a clamping portion 617 extending toward the ball nut 613 is configured on the driving shaft 614 , and the clamping portion 617 is clamped in the clamping groove 616 .

[0083] It is understandable that, based on the mutual engagement between the snap-fit ​​portion 617 and the snap-fit ​​groove 616 , the drive shaft 614 and the ball nut 613 can form an anti-slip connection in the circumferential direction to ensure that the rotation of the drive shaft 614 can drive the ball nut 613 to rotate.

[0084] A connecting portion may be threadedly connected to one side of the ball nut 613 facing the drive shaft 614. The slot 616 may be configured on the side of the connecting portion facing the drive shaft 614. Based on this approach, the processing structure on the ball nut 613 can be reduced, the production of the ball nut 613 is facilitated, and the strength of the ball nut 613 is ensured.

[0085] In some embodiments, at least two slots 616 are circumferentially spaced apart on one side of the connection portion facing the drive shaft 614. The drive shaft 614 is circumferentially spaced apart on at least two clamping portions 617 extending toward the connection portion. Based on the cooperation between the at least two clamping portions 617 and the at least two slots 616, a stable and reliable connection between the drive shaft 614 and the ball nut 613 is achieved.

[0086] The slot 616 can be located on the surface of the connection portion near the edge. The slot 616 can be U-shaped, semicircular, etc. The shape and position of the clamping portion 617 are consistent with those of the slot 616.

[0087] In some embodiments, a clamping portion 617 is configured on one side of the ball nut 613 facing the driving shaft 614 , and a clamping groove 616 is configured on one side of the driving shaft 614 facing the ball nut 613 , and the clamping portion 617 is clamped in the clamping groove 616 .

[0088] It is understandable that, based on the mutual engagement between the snap-fit ​​portion 617 and the snap-fit ​​groove 616 , the drive shaft 614 and the ball nut 613 can form an anti-slip connection in the circumferential direction to ensure that the rotation of the drive shaft 614 can drive the ball nut 613 to rotate.

[0089] In some embodiments, Figure 2 As shown, a limiting member 63 is installed in the housing 6 , and the limiting member 63 abuts against a side of the ball nut 613 away from the driving shaft 614 .

[0090] It is understandable that one end of the ball nut 613 is connected to the drive shaft 614 so that the ball nut 613 can rotate with the drive shaft 614. The limiter 63 can limit the other end of the ball nut 613 to prevent the connection between the ball nut 613 and the drive shaft 614 from loosening and affecting the transmission. The housing 6 is usually vertically prevented, and the limiter 63 is located below the ball nut 613 so that the limiter 63 can lock the position of the ball nut 613 in the height direction.

[0091] The side of the limiting member 63 facing the ball nut 613 may be coated with lubricating oil to reduce the friction between the ball nut 613 and the limiting member 63 .

[0092] In some embodiments, the stopper 63 may be threadedly connected to the housing 6. The outer peripheral surface of the stopper 63 may be provided with external threads, and the portion of the housing 6 for connecting the stopper 63 may be provided with internal threads to achieve the threaded connection between the stopper 63 and the housing 6.

[0093] In some embodiments, Figure 2 As shown, a first buffer member 64 is provided in the housing 6 , the first buffer member 64 is connected to the piston rod 3 , and is located between the buffer assembly 1 and the bottom of the housing 6 .

[0094] It is understandable that the end of the piston rod 3 away from the screw rod 2 can pass through the bottom of the housing 6. When the driving member 61 drives the screw rod 2 to move toward the bottom of the housing 6, the screw rod 2 will drive the buffer assembly 1 and the piston rod 3 to move toward the housing 6. Based on the setting of the first buffer member 64, the buffer assembly 1 can be prevented from colliding with the bottom of the housing 6.

[0095] When the vehicle suspension actuator is also connected to the shock absorber 7, one end of the shock absorber 7 can be inserted into the housing 6 from the bottom of the housing 6. At this time, the first buffer 64 can prevent the buffer assembly 1 from colliding with the shock absorber 7.

[0096] In some embodiments, Figure 3 As shown, the first buffer member 64 includes a flexible block, and the flexible block is connected to the piston rod 3. The flexible block can be sleeved on the piston rod 3. The flexible block can be a rubber block, a silicone block, etc. Among them, the side of the flexible block facing the bottom of the shell 6 can be set to be conical. When the screw 2 drives the buffer assembly 1 and the piston rod 3 to gradually approach the bottom of the shell 6, the flexible block can abut against the bottom of the shell 6, thereby playing a buffering effect, preventing the tray 18 of the buffer assembly 1 from hard collision with the bottom of the shell 6 or the shock absorber 7.

[0097] In some embodiments, Figure 4 and Figure 5As shown, the first buffer member 64 includes a first elastic member, the first elastic member is sleeved on the piston rod 3, and the two ends of the first elastic member are respectively in contact with the bottom of the buffer assembly 1 and the housing 6. The first elastic member can be a spring. When the screw rod 2 drives the buffer assembly 1 and the piston rod 3 to gradually approach the bottom of the housing 6, the spring is gradually compressed, so that the buffer assembly 1 and the bottom of the housing 6 are prevented from having a hard collision based on the action of the spring.

[0098] In some embodiments, a buffer chamber 13 is constructed in the buffer assembly 1. A second buffer member 14 is arranged in the buffer chamber 13. One end of the second buffer member 14 abuts against the wall of the buffer chamber 13 near the screw rod 2, and the other end abuts against the piston rod 3.

[0099] In some embodiments, one end of the second buffer 14 is abutted against the wall of the buffer cavity 13 close to the screw rod 2, and the other end of the second buffer 14 is abutted against the piston rod 3, so as to achieve the second buffer 14 being disposed between the screw rod 2 and the piston rod 3. Thus, the high-frequency vibration between the piston rod 3 and the screw rod 2 can be buffered by the second buffer 14, so as to avoid the screw rod 2 and the piston rod 3 being damaged by the high-frequency vibration excitation of the road surface.

[0100] Generally speaking, the screw rod 2 is located on the upper side of the piston rod 3. The buffer cavity 13 in the buffer assembly 1 can extend in the height direction.

[0101] In some embodiments, the buffer assembly 1 has a first end 11 and a second end 12 that are arranged opposite to each other. The screw rod 2 is integrally formed at the first end 11 of the buffer assembly 1. At this time, the screw rod 2 forms a soft contact with the mounting portion 51 of the piston rod 3 through the buffer assembly 1 and the second buffer member 14 inside. Therefore, the second buffer member 14 can be used to buffer the high-frequency vibration between the piston rod 3 and the screw rod 2 to prevent the screw rod 2 and the piston rod 3 from being damaged due to impact.

[0102] In some embodiments, the screw rod 2 can also be fixed to the first end 11 of the buffer assembly 1 through the first connecting member 4. At this time, the screw rod 2 forms a soft contact with the piston rod 3 through the first connecting member 4 and the second buffer member 14. Therefore, the second buffer member 14 can be used to buffer the high-frequency vibration between the piston rod 3 and the screw rod 2 to prevent the screw rod 2 and the piston rod 3 from being damaged due to impact.

[0103] In some embodiments, Figure 2 and Figure 3 As shown, the buffer cavity 13 has a first opening 16 formed at the first end 11. A first connecting member 4 is disposed in the buffer cavity 13. The first connecting member 4 includes a connecting section 41 passing through the buffer cavity 13 from the first opening 16. The connecting section 41 is connected to the screw rod 2.

[0104] It can be understood that the connecting section 41 passes through the buffer cavity 13 from the first opening 16, so as to be connected to the screw rod 2. Thus, the connection between the screw rod 2 and the buffer assembly 1 is achieved.

[0105] The first connecting member 4 can be a bolt, and the connecting section 41 is a threaded section. A threaded hole is configured on the side of the screw rod 2 facing the buffer assembly 1, and the threaded section is threadedly connected to the threaded hole. Thus, a detachable connection between the screw rod 2 and the buffer assembly 1 can be achieved.

[0106] Preferably, the first opening 16 is a circular hole. The buffer cavity 13 is a cylindrical cavity.

[0107] In some embodiments, Figure 2 and Figure 3 As shown, the first connecting member 4 further includes a fixing section 42 disposed in the buffer cavity 13. The fixing section 42 is connected to the connecting section 41. The aperture of the buffer cavity 13 is D1, the diameter of the first opening 16 is D2, the diameter of the fixing section 42 is D3, and the diameter of the connecting section 41 is D4. The following conditions are satisfied: D4≤D2<D3≤D1.

[0108] The fixing section 42 can be used as a limiting mechanism to prevent the first connecting member 4 from falling off from the first opening 16. The fixing section 42 and the connecting section 41 are integrally formed.

[0109] It is understandable that, in order to ensure that the fixing section 42 can be accommodated in the buffer cavity 13, the diameter D3 of the fixing section 42 must be less than or equal to the aperture D1 of the buffer cavity 13. In the embodiment of the present application, it is preferred that the diameter D3 of the fixing section 42 is equal to the aperture D1 of the buffer cavity 13. In order to prevent the fixing section 42 from passing through the first opening 16 and causing the first connecting member 4 to fall off from the buffer cavity 13, it is necessary to satisfy that the diameter D3 of the fixing section 42 is greater than the diameter D2 of the first opening 16. In order to ensure that the connecting section 41 can pass through the first opening 16, it is necessary to satisfy that the diameter D4 of the connecting section 41 is less than or equal to the diameter D2 of the first opening 16. In the embodiment of the present application, it is preferred that the diameter D4 of the connecting section 41 is equal to the diameter D2 of the first opening 16.

[0110] In some embodiments, a third buffer member 15 and a second connecting member 5 are further provided in the buffer cavity 13. The third buffer member 15 is spaced apart from the second buffer member 14. The third buffer member 15 is configured with a through hole 151. The second connecting member 5 includes a mounting portion 51 and a transition portion 52 connected to each other. Both ends of the mounting portion 51 abut against the second buffer member 14 and the third buffer member 15, respectively. The transition portion 52 is penetrated through the through hole 151, and one end of the transition portion 52 away from the mounting portion 51 is connected to the piston rod 3.

[0111] It can be understood that the mounting portion 51 is located between the second buffer member 14 and the third buffer member 15, and the piston rod 3 is in contact with the second buffer member 14 through the second connecting member 5, so as to utilize the second buffer member 14 to buffer the high-frequency vibration between the piston rod 3 and the screw rod 2. The third buffer member 15 is connected between the piston rod 3 and the mounting portion 51. On the one hand, the third buffer member 15 can further buffer the high-frequency vibration between the piston rod 3 and the screw rod 2, and on the other hand, it can also buffer the vibration and impact between the mounting portion 51 of the piston rod 3 and the lower cavity wall of the buffer cavity 13, so as to buffer the vibration between the piston rod 3 and the buffer assembly 1, thereby preventing the buffer assembly 1 from causing damage to the piston rod 3.

[0112] In some embodiments, the mounting portion 51, the transition portion 52 and the piston rod 3 are integrally formed to form an integral piston rod 3. Alternatively, the mounting portion 51 and the transition portion 52 are integrally formed, and the integrally formed mounting portion 51 and the transition portion 52 are separately connected to the piston rod 3. The mounting portion 51 based on the piston rod 3 is arranged between the second buffer 14 and the third buffer 15. When the vehicle vibrates at high frequency due to road conditions, the vibration impact of the upper screw 2 on the mounting portion 51 can be buffered by the second buffer 14, and the vibration impact of the lower cavity wall of the buffer cavity 13 on the mounting portion 51 can be buffered by the third buffer 15.

[0113] The second buffer 14 and the third buffer 15 may be spaced apart in the height direction, wherein the second buffer 14 is close to the first end 11 , and the third buffer 15 is close to the second end 12 .

[0114] In some embodiments, Figure 2 and Figure 3 As shown, the buffer cavity 13 also has a second opening 17 formed at the second end 12. The transition portion 52 is integrally formed with the mounting portion 51. The transition portion 52 passes through the buffer cavity 13 from the second opening 17 and is connected to the piston rod 3.

[0115] It can be understood that the transition portion 52 passes through the buffer cavity 13 from the second opening 17, so as to be connected with the piston rod 3 of the piston rod 3. Thus, the connection between the piston rod 3 and the buffer assembly 1 is achieved.

[0116] Among them, the integrally formed mounting portion 51 and transition portion 52 can be connected to the piston rod 3 as fasteners to form a split piston rod 3. For example, the integrally formed mounting portion 51 and transition portion 52 can form a bolt, and the transition portion 52 is a threaded section. A threaded hole is configured on the side of the piston rod 3 facing the buffer assembly 1, and the threaded section is threadedly connected to the threaded hole. In this way, the connection between the piston rod 3 and the transition portion 52 of the piston rod 3 can be achieved, so that the piston rod 3 can be detachably connected to the buffer assembly 1.

[0117] Preferably, the second opening 17 is a circular hole. The buffer cavity 13 is a cylindrical cavity.

[0118] When the screw rod 2 is connected to the first connecting member 4 and the transition portion 52 is integrally formed with the mounting portion 51, the second buffer member 14 will be located between the fixed section 42 of the first connecting member 4 and the mounting portion 51. The screw rod 2 and the piston rod 3 can be abutted against the second buffer member 14 between the first connecting member 4 and the mounting portion 51 to buffer high-frequency vibration excitation.

[0119] In some embodiments, Figure 2 and Figure 3 As shown, the diameter of the buffer cavity 13 is D1, the aperture of the second opening 17 is D5, the diameter of the mounting portion 51 is D6, and the diameter of the transition portion 52 is D7, satisfying: D7≤D5<D6≤D1.

[0120] The mounting portion 51 may serve as a limiting mechanism to prevent the piston rod 3 from falling off from the second opening 17 .

[0121] It is understandable that, in order to ensure that the mounting portion 51 can be accommodated in the buffer cavity 13, the diameter D6 of the mounting portion 51 must be less than or equal to the aperture D1 of the buffer cavity 13. In the embodiment of the present application, it is preferred that the diameter D6 of the mounting portion 51 is equal to the aperture D1 of the buffer cavity 13. In order to prevent the mounting portion 51 from passing through the second opening 17 and causing the screw 2 to fall off from the buffer cavity 13, it is necessary to satisfy that the diameter D6 of the mounting portion 51 is greater than the diameter D5 of the second opening 17. In order to ensure that the transition portion 52 can pass through the second opening 17, it is necessary to satisfy that the diameter D7 of the transition portion 52 is less than or equal to the diameter D5 of the second opening 17. In the embodiment of the present application, it is preferred that the diameter D7 of the transition portion 52 is equal to the diameter D5 of the second opening 17.

[0122] In some embodiments, Figure 2 and Figure 3 As shown, the buffer assembly 1 also includes a tray 18 and a cover plate 19. The cover plate 19 is connected to the side of the tray 18 facing the screw rod 2, and is enclosed with the tray 18 to form a buffer chamber 13. Among them, the first opening 16 is formed in the cover plate 19. The second opening 17 is configured on the side of the tray 18 facing the piston rod 3.

[0123] It can be understood that the tray 18 is used to support and connect the screw rod 2. When the screw rod 2 is driven to move up and down in the height direction, the screw rod 2 can push the tray 18 to move up and down to drive the piston rod 3 to move up and down. The cover plate 19 is located on the side facing the screw rod 2, and the connecting section 41 of the first connecting member 4 is penetrated by constructing the first opening 16 to realize the connection between the screw rod 2 and the buffer assembly 1. The tray 18 is constructed with a second opening 17 on the side away from the cover plate 19 to penetrate the transition portion 52 to realize the connection between the piston rod 3 and the buffer assembly 1.

[0124] The tray 18 and the cover plate 19 can be detachably connected by a fastening mechanism such as bolts. The tray 18 and the cover plate 19 are detachably arranged, and cooperate with the first connecting member 4 to realize the detachable assembly between the screw rod 2, the piston rod 3 and the buffer assembly 1.

[0125] In some embodiments, at least two first connection holes are arranged at intervals on the tray 18, and at least two second connection holes are arranged at intervals on the cover plate 19. When the cover plate 19 is covered on the tray 18, the first connection hole is aligned with the second connection hole, and a fastening mechanism such as a screw is sequentially inserted through the first connection hole and the second connection hole to achieve a reliable connection between the tray 18 and the cover plate 19. For example, four first connection holes are arranged at intervals along the circumferential direction on the tray 18, and four second connection holes are also arranged at intervals along the circumferential direction on the cover plate 19.

[0126] In some embodiments, Figure 8 As shown, a connecting portion 21 is constructed at one end of the screw rod 2 facing the cover plate 19, and the connecting portion 21 is constructed with a connecting notch 211. The cover plate 19 is constructed with a positioning block 191 on the inner circumference of the first opening 16. The connecting portion 21 is clamped in the first opening 16, and the positioning block 191 is clamped in the connecting notch 211.

[0127] It is understandable that by clamping the connecting portion 21 in the first opening 16 and clamping the positioning block 191 in the connecting notch 211 , the screw rod 2 and the cover plate 19 can be quickly assembled.

[0128] like Figure 8 As shown, the connecting portion 21 can be set to a circular ring shape. Two connecting notches 211 can be configured on the connecting portion 21, and two positioning blocks 191 are correspondingly configured on the cover plate 19. The two positioning blocks 191 can be arranged opposite to each other, and the sides of the two positioning blocks 191 facing each other can be set to an arc surface, so that the connecting section 41 can pass through the buffer cavity 13 from the position between the two positioning blocks 191.

[0129] The connecting portion 21 may be integrally formed with the screw rod 2. The positioning block 191 is integrally formed with the inner circumference of the first opening 16. The shape of the connecting notch 211 formed on the connecting portion 21 is consistent with the shape of the positioning block 191.

[0130] In some embodiments, the end of the screw rod 2 facing the cover plate 19 is configured with a connection portion 21, and the connection portion 21 is configured with a positioning block 191. The cover plate 19 is configured with a connection notch 211 on the inner circumference of the first opening 16. The connection portion 21 is clamped to the first opening 16, and the positioning block 191 is clamped in the connection notch 211.

[0131] It is understandable that by clamping the connecting portion 21 in the first opening 16 and clamping the positioning block 191 in the connecting notch 211 , the screw rod 2 and the cover plate 19 can be quickly assembled.

[0132] The connecting portion 21 may be configured in a circular shape. Two positioning blocks 191 may be configured on the connecting portion 21, and two corresponding connecting notches 211 may be configured on the cover plate 19. The two positioning blocks 191 may be arranged opposite to each other, and the sides of the two positioning blocks 191 facing each other may be configured as arc surfaces, so that the connecting section 41 can pass through the buffer cavity 13 from the position between the two positioning blocks 191.

[0133] In some embodiments, the outer circumferential surface of the tray 18 of the buffer assembly 1 is configured with a stopper 181. A stopper groove 62 extending along the first direction is configured in the shell 6, and the stopper 181 is engaged in the stopper groove 62. Among them, the outer circumferential surface of the tray 18 of the buffer assembly 1 is configured with a stopper 181, and the stopper 181 is slidably engaged in the stopper groove 62 extending along the first direction, so the stopper 181 can only slide along the extension direction of the stopper groove 62 and cannot rotate. The screw rod 2 can also only slide along the extension direction of the stopper groove 62 and cannot rotate. As a result, the ball nut 613 can only drive the screw rod 2 to make a linear motion along the first direction.

[0134] In some embodiments, Figure 2 As shown, the first direction is the height direction of the shell 6.

[0135] In some embodiments, a stopper 181 is integrally formed on either of the two opposite sides of the outer circumference of the tray 18. The housing 6 is configured with a stopper groove 62 extending along the first direction on both opposite sides of its inner surface. Thus, by sliding and engaging the two stoppers 181 in the stopper grooves 62 on both sides, the force acting on the tray 18 is relatively uniform, so that the tray 18 can smoothly perform linear motion along the first direction.

[0136] The anti-rotation member 181 and the anti-rotation groove 62 can be clearance-matched, and the clearance between the two is set to 0.1 mm.

[0137] In some embodiments, the second buffer member 14 includes at least one of a flexible gasket, a second elastic member, and a gas sealed in the buffer cavity 13 .

[0138] like Figure 3 As shown, the second buffer member 14 is configured as a flexible gasket. At this time, the flexible gasket can be located between the first connector 4 and the mounting portion 51, so as to buffer the high-frequency vibration excitation between the screw rod 2 and the piston rod 3. For example, the flexible gasket is a rubber gasket, a silicone gasket, or a flexible resin gasket.

[0139] like Figure 4As shown, the second buffer member 14 is configured as a second elastic member. In this case, the screw rod 2 can be integrally formed at the first end 11. The two ends of the second elastic member can respectively abut between the upper cavity wall of the buffer cavity 13 and the mounting portion 51 of the piston rod 3, thereby achieving the effect of buffering the high-frequency vibration excitation between the screw rod 2 and the piston rod 3. For example, the second elastic member is a spring.

[0140] like Figure 5 As shown, the second buffer member 14 is configured to seal the gas in the buffer chamber 13. At this time, the screw rod 2 can be integrally formed at the first end 11. The mounting portion 51 of the piston rod 3 is spaced apart from the upper cavity wall of the buffer chamber 13. Thus, the gas between the mounting portion 51 and the upper cavity wall serves as the second buffer member 14, which has the effect of buffering the high-frequency vibration excitation between the screw rod 2 and the piston rod 3. For example, the second elastic member is air sealed in the buffer chamber 13.

[0141] like Figure 5 As shown, the second buffer member 14 is configured to seal the gas in the buffer chamber 13. At this time, the screw 2 can be integrally formed at the first end 11. The mounting portion 51 of the piston rod 3 is configured with an air groove. The upper cavity wall of the buffer portion is connected with a sliding portion. The sliding portion is slidably installed in the air groove. As a result, the gas located between the mounting portion 51 and the upper cavity wall and the gas located in the air groove together serve as the second buffer member 14, which has the effect of buffering the high-frequency vibration excitation between the screw 2 and the piston rod 3.

[0142] In some embodiments, a flexible gasket and a second elastic member may be disposed in the buffer chamber 13 at the same time, so that the two cooperate with each other to achieve the effect of buffering high-frequency vibration excitation between the screw rod 2 and the piston rod 3 .

[0143] In some embodiments, the third buffer member 15 includes at least one of a flexible gasket, a third elastic member, and a gas sealed in the buffer cavity 13 .

[0144] like Figures 3 to 5 As shown, the third buffer member 15 is configured as a flexible gasket. At this time, the flexible gasket can be sleeved on the transition portion 52 and located between the mounting portion 51 and the piston rod 3, so as to buffer the high-frequency vibration excitation between the mounting portion 51 and the piston rod 3. For example, the flexible gasket is a rubber gasket, a silicone gasket, or a flexible resin gasket.

[0145] In some embodiments, the third buffer member 15 is configured as a third elastic member. In this case, the mounting portion 51 can be integrally formed with the piston rod 3. The two ends of the third elastic member can respectively abut between the mounting portion 51 of the piston rod 3 and the lower cavity wall of the buffer cavity 13, thereby playing the effect of buffering the high-frequency vibration excitation between the piston rod 3 and the buffer assembly 1. For example, the third elastic member is a spring.

[0146] In some embodiments, the third buffer member 15 is configured to be a gas sealed in the buffer chamber 13. In this case, the mounting portion 51 can be integrally formed with the piston rod 3. The mounting portion 51 of the piston rod 3 is spaced apart from the lower cavity wall of the buffer chamber 13. Thus, the gas between the mounting portion 51 and the lower cavity wall acts as the third buffer member 15, which has the effect of buffering the high-frequency vibration excitation between the plug rod and the buffer assembly 1. For example, the third elastic member is air sealed in the buffer chamber 13.

[0147] In some embodiments, a flexible gasket and a third elastic member may also be disposed in the buffer cavity 13 at the same time, so that the two cooperate with each other to achieve the effect of high-frequency vibration excitation between the buffer plug rod and the buffer assembly 1 .

[0148] In some embodiments, Figure 2 As shown, the vehicle suspension actuator also includes a shock absorber 7. One end of the shock absorber 7 is inserted into the shell 6 from the bottom of the shell 6, and the other end is located outside the shell 6. The shock absorber 7 is filled with magnetorheological fluid, the piston rod 3 is inserted into the shock absorber 7, and is connected to a coil 71, which has an energized state and a de-energized state. In the energized state, the damping value of the magnetorheological fluid is Z1, and in the de-energized state, the damping value of the magnetorheological fluid is Z2, satisfying: Z1>Z2.

[0149] The shock absorber 7 can reduce vibration and adjust the damping of the vehicle suspension actuator. When the coil 71 in the shock absorber 7 is energized, the magnetic field generated by the coil 71 will change the viscosity of the magnetorheological fluid. As a result, the damping value of the magnetorheological fluid is increased, thereby increasing the damping of the vehicle suspension actuator. When the coil 71 in the shock absorber 7 is de-energized, the coil 71 will not change the viscosity of the magnetorheological fluid. As a result, the damping value of the magnetorheological fluid will not change.

[0150] In some embodiments, the damping value of the magnetorheological fluid is positively correlated with the current value in the coil 71 .

[0151] It can be understood that the damping value of the magnetorheological fluid increases as the current value in the coil 71 increases, and decreases as the current value in the coil 71 decreases. When it is necessary to reduce the damping value of the magnetorheological fluid, the current value in the coil 71 can be reduced. When it is necessary to increase the damping value of the magnetorheological fluid, the current value in the coil 71 can be increased.

[0152] In some embodiments, Figure 2 As shown, the outer surface of the shell 6 is constructed with a first abutment 65, the outer surface of the shock absorber 7 is constructed with a second abutment 72, and the outer shell 6 is connected with a fourth elastic member 66, one end of the fourth elastic member 66 abuts against the first abutment 65, and the other end of the fourth elastic member 66 extends to the shock absorber 7 and abuts against the second abutment 72.

[0153] In some embodiments, the fourth elastic member 66 is a coil spring. The fourth elastic member 66 can support the housing 6 and the shock absorber 7. The housing 6 and the shock absorber 7 are respectively installed at two height positions of the vehicle, and the fourth elastic member 66 can also play a supporting role for the vehicle. When the stator 611 loses power, the fourth elastic member 66 can play the effect of supporting the weight of the vehicle.

[0154] On the other hand, the embodiment of the present application further provides a vehicle. The vehicle includes the vehicle suspension actuator as described in the above embodiment. The vehicle has all the beneficial effects of the vehicle suspension actuator as described above, which will not be described in detail here.

[0155] The vehicle may be a fuel vehicle, a plug-in hybrid vehicle, a new energy vehicle, etc., and the present disclosure does not make any specific limitation on this.

[0156] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0157] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0158] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0159] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A vehicle suspension actuator, characterized in that: include: Screw rod; Piston rod; A buffer assembly, one end of which is connected to the screw rod, and the other end of which is connected to the piston rod; A housing, wherein the screw rod, the piston rod and the buffer assembly are all arranged in the housing; The buffer assembly is provided with a buffer cavity, the buffer cavity is provided with a second buffer member, one end of the second buffer member abuts against the cavity wall of the buffer cavity close to the screw rod, and the other end abuts against the piston rod; A third buffer member and a second connecting member are also provided in the buffer cavity. The third buffer member is spaced apart from the second buffer member. The third buffer member is configured with a through hole. The second connecting member includes a mounting portion and a transition portion that are connected to each other. Both ends of the mounting portion are respectively abutted against the second buffer member and the third buffer member. The transition portion is passed through the through hole, and one end of the transition portion away from the mounting portion is connected to the piston rod.

2. The vehicle suspension actuator according to claim 1, characterized in that: A driving member is installed in the housing, and the driving member is connected to the screw rod to drive the screw rod to move linearly.

3. The vehicle suspension actuator according to claim 2, characterized in that: The driving member comprises: A stator, fixedly installed in the housing; A rotor, rotatably connected to the stator; A ball nut connected to the rotor, wherein the ball nut rotates with the rotor; Wherein, the screw rod is inserted into the ball nut.

4. The vehicle suspension actuator according to claim 3, characterized in that: The driving member also includes: A drive shaft is fixed in the rotor, and the axis of the drive shaft coincides with the axis of the rotor; Wherein, the driving shaft is connected to the ball nut.

5. The vehicle suspension actuator according to claim 4, characterized in that: The driving shaft is formed with a receiving groove, the notch of the receiving groove faces the ball nut, and one end of the screw rod away from the buffer assembly passes through the ball nut and is inserted into the receiving groove.

6. The vehicle suspension actuator according to claim 4, characterized in that: One of the ball nut and the driving shaft is configured with a clamping groove, and the other is configured with a clamping portion, and the clamping portion is clamped in the clamping groove.

7. The vehicle suspension actuator according to claim 4, characterized in that: A limiting member is installed in the housing, and the limiting member abuts against a side of the ball nut away from the driving shaft.

8. The vehicle suspension actuator according to claim 3, characterized in that: A first buffer is arranged in the shell, and the first buffer is connected to the piston rod and is located between the buffer assembly and the bottom of the shell.

9. The vehicle suspension actuator according to claim 8, characterized in that: The first buffer member includes a flexible block; And / or, the first buffer member includes a first elastic member, the first elastic member is sleeved on the piston rod, and two ends of the first elastic member are respectively in contact with the buffer assembly and the bottom of the shell.

10. The vehicle suspension actuator according to any one of claims 1 to 9, characterized in that: The buffer cavity has a first opening. A first connecting member is disposed in the buffer cavity. The first connecting member includes a connecting section that passes through the buffer cavity from the first opening. The connecting section is connected to the screw rod.

11. The vehicle suspension actuator according to claim 10, characterized in that: The first connecting member also includes a fixed section arranged in the buffer cavity, and the fixed section is connected to the connecting section, wherein the aperture of the buffer cavity is D1, the diameter of the first opening is D2, the diameter of the fixed section is D3, and the diameter of the connecting section is D4, satisfying: D4≤D2<D3≤D1.

12. The vehicle suspension actuator according to claim 10, characterized in that: The buffer cavity further has a second opening. The transition portion is integrally formed with the mounting portion. The transition portion passes through the buffer cavity from the second opening and is connected to the piston rod.

13. The vehicle suspension actuator according to claim 12, characterized in that: The diameter of the buffer cavity is D1, the aperture of the second opening is D5, the diameter of the mounting portion is D6, and the diameter of the transition portion is D7, satisfying: D7≤D5<D6≤D1.

14. The vehicle suspension actuator according to claim 12, characterized in that: The buffer assembly also includes: tray; A cover plate is connected to a side of the tray facing the screw rod and is enclosed with the tray to form the buffer cavity, wherein the first opening is formed on the cover plate, and the second opening is constructed on a side of the tray facing the piston rod.

15. The vehicle suspension actuator according to claim 14, characterized in that A connecting portion is configured at one end of the screw rod facing the cover plate, one of the cover plate and the connecting portion is configured with a positioning block, and the other is configured with a connecting notch, the connecting portion is clamped in the first opening, and the positioning block is clamped in the connecting notch.

16. The vehicle suspension actuator according to claim 14, characterized in that A rotation-stopping member is configured on the outer peripheral surface of the tray, a rotation-stopping groove extending along a first direction is configured in the shell, and the rotation-stopping member is clamped in the rotation-stopping groove.

17. The vehicle suspension actuator according to any one of claims 1 to 9, characterized in that: The second buffer member includes at least one of a flexible gasket, a second elastic member, and a gas sealed in the buffer cavity.

18. The vehicle suspension actuator according to claim 10, characterized in that The third buffer member includes at least one of a flexible gasket, a third elastic member, and a gas sealed in the buffer cavity.

19. The vehicle suspension actuator according to any one of claims 2 to 9, characterized in that: The vehicle suspension actuator further comprises: A shock absorber, one end of which is inserted into the shell from the bottom of the shell, and the other end is located outside the shell; The shock absorber is filled with magnetorheological fluid, the piston rod is inserted into the shock absorber and is connected to a coil, the coil has a powered state and a de-powered state, in the powered state, the damping value of the magnetorheological fluid is Z1, in the de-powered state, the damping value of the magnetorheological fluid is Z2, satisfying: Z1>Z2.

20. The vehicle suspension actuator according to claim 19, characterized in that The damping value of the magnetorheological fluid is positively correlated with the current value in the coil.

21. The vehicle suspension actuator according to claim 19, characterized in that The outer surface of the shell is configured with a first abutment, the outer surface of the shock absorber is configured with a second abutment, the outer shell is outer-mounted with a fourth elastic member, one end of the fourth elastic member abuts against the first abutment, and the other end of the fourth elastic member extends to the shock absorber and abuts against the second abutment.

22. A vehicle, characterized in that: Comprising a vehicle suspension actuator as claimed in any one of claims 1-21.

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