Shock absorber, suspension assembly and vehicle

Abstract

The invention discloses a shock absorber, a suspension assembly and a vehicle, and relates to the technical field of vehicles. The shock absorber comprises a shell, a motor part, a push rod and a gear transmission mechanism, the motor part is installed on the shell, the push rod is installed on the shell, the push rod and the motor part are coaxially arranged, a rack part is arranged on the push rod, and the gear transmission mechanism is in transmission connection with the motor part and further in transmission connection with the rack part. According to the shock absorber, the push rod and the motor part are coaxially arranged, so that the radial size of the shock absorber can be reduced, and the structure of the shock absorber is compact.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a shock absorber, a suspension assembly having the shock absorber, and a vehicle having the suspension assembly. Background Art

[0002] In the related art, the shock absorber includes a housing, a motor part and a push rod, wherein the motor part is located on one radial side of the push rod, and when the motor part is working, it drives the push rod to move linearly. This type of shock absorber has a large radial dimension, resulting in a bulky overall structure of the shock absorber. Therefore, there is room for improvement. Summary of the invention

[0003] The present invention aims to solve at least one of the above-mentioned technical problems in the prior art to a certain extent. To this end, the present invention provides a shock absorber with a compact structure.

[0004] The invention also provides a suspension assembly having the shock absorber.

[0005] The present invention also provides a vehicle having the suspension assembly.

[0006] The shock absorber according to the embodiment of the present invention includes: a housing, a motor part, a push rod and a gear transmission mechanism, the motor part is installed on the housing, the push rod is installed on the housing, the push rod is coaxially arranged with the motor part, a rack part is provided on the push rod, the gear transmission mechanism is transmission-connected with the motor part, and the gear transmission mechanism is also transmission-connected with the rack part.

[0007] According to the vibration absorber of the embodiment of the present invention, by arranging the push rod and the motor part coaxially, the radial dimension of the vibration absorber can be reduced, so that the vibration absorber has a compact structure.

[0008] According to some embodiments of the present invention, the housing includes a first housing portion and a second housing portion connected to each other, the motor portion is mounted on the first housing portion, and the push rod is mounted on the second housing portion.

[0009] According to some embodiments of the present invention, the second shell portion includes a guide cylinder, the motor portion is sleeved outside the guide cylinder, the guide cylinder has a guide hole coaxially arranged with the motor portion, and the push rod is at least partially arranged in the guide hole and can reciprocate along the axial direction of the guide hole.

[0010] According to some embodiments of the present invention, the motor part includes a motor rotor, a motor stator and a motor gear, the motor rotor can rotate relative to the motor stator, the motor gear is fixedly connected to the motor rotor, and the gear transmission mechanism meshes with the motor gear for transmission.

[0011] According to some embodiments of the present invention, the gear transmission mechanism includes: a gear housing assembly, a gear shaft, a first gear portion and a second gear portion, the gear housing assembly is connected to the housing, the gear shaft is supported by the gear housing assembly, the first gear portion and the second gear portion are arranged on the gear shaft, the first gear portion is engaged with the motor gear for transmission, and the second gear portion is engaged with the rack portion for transmission.

[0012] According to some embodiments of the present invention, at least one of the first gear portion and the second gear portion is a helical gear.

[0013] According to some embodiments of the present invention, the gear transmission mechanism further includes a bearing, wherein the bearing is disposed on the gear shaft, and the gear shaft is rotatably supported on the gear housing assembly via the bearing.

[0014] According to some embodiments of the present invention, the gear housing assembly includes: a gear housing and a gear end cover, the gear housing having a gear mounting cavity and a housing opening connected to the gear mounting cavity, the gear end cover being connected to the gear housing and used to seal the housing opening; wherein one end of the gear shaft is supported on the gear housing, and the other end of the gear shaft is supported on the gear end cover.

[0015] According to some embodiments of the present invention, the gear housing has an axial mounting surface and a circumferential mounting surface of the housing, one end of the gear end cover is suitable for abutting against the axial mounting surface of the housing, a retaining ring mounting groove is provided on the circumferential mounting surface of the housing, and the gear housing assembly also includes a fixed retaining ring, which is installed in the retaining ring mounting groove and is used to limit the gear end cover between the axial mounting surface of the housing and the fixed retaining ring.

[0016] According to some embodiments of the present invention, the gear end cover includes an end cover body and an end cover extension portion, the end cover body is located between the axial mounting surface of the housing and the fixed retaining ring, the end cover extension portion is connected to the side of the end cover body facing the gear mounting cavity, the end cover extension portion has an end cover circumferential mounting surface, and a sealing structure is provided between the end cover circumferential mounting surface and the cavity wall of the gear mounting cavity.

[0017] According to some embodiments of the present invention, a sealing ring installation groove is provided on the circumferential installation surface of the end cover, and the sealing structure includes a sealing ring, which is installed in the sealing ring installation groove and abuts against the cavity wall of the gear installation cavity.

[0018] According to some embodiments of the present invention, the gear shaft is rotatably supported on the gear housing via a first bearing; and / or, the gear shaft is rotatably supported on the gear end cover via a second bearing.

[0019] According to some embodiments of the present invention, the angle between the axis of the gear shaft and the reciprocating direction of the push rod is greater than 0° and less than 180°.

[0020] According to some embodiments of the present invention, the shock absorber also includes an adjusting mechanism, which includes: an adjusting screw and an adjusting pressure block, the adjusting screw is threadedly connected to the housing, the adjusting pressure block is located between a side of the push rod facing away from the rack portion and the adjusting screw, and the adjusting screw is used to adjust the thrust of the adjusting pressure block on the push rod.

[0021] According to some embodiments of the present invention, the second shell part also includes an adjusting cylinder, which is connected to the guide cylinder. An adjusting cavity is provided in the adjusting cylinder, which is communicated with the guide hole, and the adjusting screw is threadedly connected to the inner wall of the adjusting cavity.

[0022] According to some embodiments of the present invention, a screw sealing ring is provided between the outer peripheral surface of the adjusting screw and the inner cavity wall of the adjusting cavity.

[0023] According to some embodiments of the present invention, the adjustment mechanism is located on one axial side of the motor portion.

[0024] According to some embodiments of the present invention, the adjustment mechanism is provided on both axial sides of the motor part.

[0025] According to some embodiments of the present invention, the first shell portion and the second shell portion are an integral piece; or, the first shell portion and the second shell portion are separate pieces.

[0026] According to some embodiments of the present invention, the gear transmission mechanism is located on one axial side of the motor portion.

[0027] According to some embodiments of the present invention, there are two gear transmission mechanisms, which are located on both axial sides of the motor part, the rack part includes a first rack part and a second rack part, the motor gear includes a first motor gear and a second motor gear, the gear transmission mechanism on one axial side of the motor part is suitable for transmission connection with the first motor gear and the first rack part, and the gear transmission mechanism on the other axial side of the motor part is suitable for transmission connection with the second motor gear and the second rack part.

[0028] According to some embodiments of the present invention, the push rod is an integrated piece, and the first rack portion and the second rack portion are both provided on the push rod.

[0029] According to some embodiments of the present invention, the push rod includes a first push rod and a second push rod, the first rack portion is provided on the first push rod, the second rack portion is provided on the second push rod, and the first push rod is spaced apart from the second push rod in the axial direction.

[0030] According to some embodiments of the present invention, a buffer block is provided at one end of the first push rod facing the second push rod; and / or a buffer block is provided at one end of the second push rod facing the first push rod.

[0031] According to some embodiments of the present invention, the first push rod is located above the second push rod, the first push rod has a vehicle body connection structure, and the second push rod has a lower swing arm connection structure.

[0032] According to some embodiments of the present invention, the first rack portion and the second rack portion are located on the same radial side of the push rod.

[0033] According to some embodiments of the present invention, the first rack portion and the second rack portion are located on two opposite sides of the push rod in radial direction.

[0034] According to some embodiments of the present invention, one of the housing and the push rod has a vehicle body connection structure, and the other has a lower swing arm connection structure.

[0035] The suspension assembly according to the second embodiment of the present invention includes the above-mentioned shock absorber.

[0036] According to the suspension assembly of the embodiment of the present invention, by arranging the push rod of the shock absorber coaxially with the motor part, the radial dimension of the shock absorber can be reduced, so that the structure of the shock absorber is compact, and thus the structure of the suspension assembly is compact.

[0037] A vehicle according to an embodiment of the third aspect of the present invention comprises the above-mentioned suspension assembly.

[0038] According to the vehicle of the embodiment of the present invention, by arranging the push rod of the shock absorber coaxially with the motor part, the radial dimension of the shock absorber can be reduced, so that the structure of the shock absorber and the suspension assembly is compact.

[0039] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is a perspective schematic diagram of a shock absorber according to a first embodiment of the present invention;

[0041] Figure 2 yes Figure 1 A front view of the shock absorber shown;

[0042] Figure 3 yes Figure 1 A cross-sectional view of the shock absorber shown;

[0043] Figure 4 yes Figure 3 A local enlarged schematic diagram of the middle A;

[0044] Figure 5 yes Figure 1 A schematic diagram of a push rod of the shock absorber shown;

[0045] Figure 6 It is an exploded schematic diagram of the gear transmission mechanism;

[0046] Figure 7 is a schematic diagram of the gear shaft;

[0047] Figure 8 is a schematic diagram of the gear housing;

[0048] Fig. 9 yes Figure 8 A partial enlarged schematic diagram of point B in the middle;

[0049] Fig.10 is a schematic diagram of the gear end cover;

[0050] Fig.11 yes Fig.10 A partial enlarged schematic diagram of point C in the middle;

[0051] Fig.12 is a schematic diagram of the regulating mechanism;

[0052] Fig.13 yes Figure 1 The schematic diagram of the shock absorber shown is in the initial position, the contracted position, and the extended position;

[0053] Fig.14 is a sectional view of a vibration absorber according to a second embodiment of the present invention;

[0054] Fig.15 is a schematic diagram of a push rod of a shock absorber according to a third embodiment of the present invention in an initial position;

[0055] Fig.16 yes Fig.15 A schematic diagram of the shock absorber shown in the retracted position;

[0056] Fig.17 yes Fig.15 A schematic diagram of the shock absorber shown in the extended position;

[0057] Fig.18 is a perspective schematic diagram of a shock absorber according to a fourth embodiment of the present invention;

[0058] Fig.19 yes Fig.18 A cross-sectional view of the shock absorber shown;

[0059] Fig. 20 yes Fig.18 A schematic diagram of a push rod of the shock absorber shown;

[0060] Fig.21 yes Fig.18 The schematic diagram of the motion relationship between the first gear shaft, the second gear shaft and the push rod when the shock absorber is contracted is shown;

[0061] Fig. 22 yes Fig.18 The schematic diagram of the motion relationship between the first gear shaft, the second gear shaft and the push rod when the shock absorber is stretched is shown;

[0062] Fig.23 is a perspective schematic diagram of a shock absorber according to a fifth embodiment of the present invention;

[0063] Fig.24 yes Fig.23 A cross-sectional view of the shock absorber shown;

[0064] Fig.25 yes Fig.23 A schematic diagram of a push rod of the shock absorber shown;

[0065] Fig.26 yes Fig.23 The schematic diagram of the motion relationship between the first gear shaft, the second gear shaft and the push rod when the shock absorber is contracted is shown;

[0066] Fig. 27 yes Fig.23 The schematic diagram of the motion relationship between the first gear shaft, the second gear shaft and the push rod when the shock absorber is stretched is shown;

[0067] Fig.28 is a schematic diagram of a suspension assembly according to an embodiment of the present invention;

[0068] Fig.29 is a schematic diagram of a vehicle according to an embodiment of the present invention.

[0069] Reference numerals:

[0070] Vehicle 1000, suspension assembly 100, shock absorber 10, housing 1, first housing portion 11, second housing portion 12, guide cylinder 121, guide hole 1211, adjustment cylinder 122, motor portion 2, motor rotor 21, motor stator 22, motor gear 23, first motor gear 231, second motor gear 232, push rod 3, rack portion 31, first rack portion 311, second rack portion 312, first push rod 32, second push rod 33, gear transmission mechanism 4, first gear transmission mechanism 4a, second gear transmission mechanism 4b, gear housing assembly 41, gear housing 411, housing axial mounting surface 4111, housing circumferential mounting surface 4112, gear mounting cavity 4113, housing opening 4114 , snap ring mounting groove 4115, first division 4116, second division 4117, third division 4118, gear end cover 412, end cover body 4121, end cover circumferential mounting surface 41221, end cover insertion portion 4122, sealing ring mounting groove 4123, embedding groove 4124, end cover axial mounting surface 4125, fixing snap ring 413, sealing ring 414, gear shaft 42, first gear shaft 42a, second gear shaft 42b, first guide section 421, second guide section 422, first gear part 43, second gear part 44, first bearing 45, adjustment mechanism 5, adjustment screw 51, adjustment pressure block 52, screw seal 53, buffer block 6, vehicle body connection structure 71, lower swing arm connection structure 72. DETAILED DESCRIPTION

[0071] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0072] In the description of the present invention, 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 the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0073] Combine the following Figure 1-Figure 29 A shock absorber 10 , a suspension assembly 100 having the shock absorber 10 , and a vehicle 1000 having the suspension assembly 100 according to an embodiment of the present invention will be described in detail.

[0074] Reference Figure 1-Figure 3 , Figure 18-Figure 19 , Figure 23-Figure 24As shown, the shock absorber 10 according to the embodiment of the present invention may include: a housing 1, a motor part 2, a push rod 3 and a gear transmission mechanism 4, the motor part 2 is installed on the housing 1, the push rod 3 is installed on the housing 1, the push rod 3 is coaxially arranged with the motor part 2, a rack part 31 is provided on the push rod 3, the gear transmission mechanism 4 is transmission-connected with the motor part 2, and the gear transmission mechanism 4 is also transmission-connected with the rack part 31.

[0075] The motor part 2 has a central hole at its center, a portion of the housing 1 passes through the central hole, a push rod 3 is disposed in the housing 1 at the central hole, and the push rod 3 can move linearly along the axis of the central hole.

[0076] In the related art, the motor part is located on one radial side of the push rod, and the motor part drives the push rod to move linearly when working. This type of shock absorber has a large radial dimension, resulting in a bulky overall structure of the shock absorber. According to the shock absorber 10 of the embodiment of the present invention, by arranging the push rod 3 and the motor part 2 coaxially, the radial dimension of the shock absorber 10 can be reduced, making the structure of the shock absorber 10 compact.

[0077] In some embodiments of the present invention, reference Figure 3 , Figure 6 , Fig.14 , Fig.19 , Fig.24 As shown, the housing 1 includes a first housing portion 11 and a second housing portion 12 , the first housing portion 11 and the second housing portion 12 are connected, the motor portion 2 is mounted on the first housing portion 11 , and the push rod 3 is mounted on the second housing portion 12 .

[0078] In some embodiments of the present invention, reference Figure 3-Figure 4 , Fig.14 , Fig.19 , Fig.24 As shown, the second shell portion 12 includes a guide cylinder 121, the motor portion 2 is sleeved outside the guide cylinder 121, the guide cylinder 121 has a guide hole 1211, the guide hole 1211 is coaxially arranged with the motor portion 2, the push rod 3 is at least partially arranged in the guide hole 1211, the push rod 3 is coaxially arranged with the guide hole 1211, and the push rod 3 can reciprocate along the axial direction of the guide hole 1211.

[0079] In some embodiments of the present invention, reference Figure 3 , Figure 6 , Fig.14 , Fig.19 , Fig.24 As shown, the motor part 2 includes a motor rotor 21, a motor stator 22 and a motor gear 23. The motor rotor 21 can rotate relative to the motor stator 22. The motor gear 23 is connected and fixed to the motor rotor 21. The gear transmission mechanism 4 is meshed and transmitted with the motor gear 23. When the motor rotor 21 rotates, the motor gear 23 is driven to rotate synchronously. The motor stator 22 is fixedly installed on the housing 1.

[0080] In some optional embodiments, the motor rotor 21 is located inside the motor stator 22, and the motor stator 22 is fixedly mounted on the first housing portion 11. In other optional embodiments, the motor rotor 21 is located outside the motor stator 22, and the motor stator 22 is fixedly mounted on the second housing portion 12, for example, it can be fixedly mounted on the guide cylinder 121. In other words, the motor rotor 21 connected to the motor gear 23 can be the inner magnetic pole of the motor or the outer magnetic pole of the motor, as long as the motor rotor 21 can rotate relative to the motor stator 22 to drive the motor gear 23 to rotate.

[0081] Optionally, the motor gear 23 is coaxially arranged with the motor rotor 21 , so that when the motor gear 23 and the motor rotor 21 rotate synchronously, the dynamic balance of the motor part 2 is better.

[0082] In some embodiments of the present invention, reference Figure 3-Figure 4 , Figure 6-Figure 7 , Fig.19 , Fig.24 As shown, the gear transmission mechanism 4 includes: a gear housing assembly 41, a gear shaft 42, a first gear part 43 and a second gear part 44. The gear housing assembly 41 is connected to the housing 1, thereby realizing the installation and fixation of the gear transmission mechanism 4 on the housing 1. The gear shaft 42 is supported by the gear housing assembly 41, and the first gear part 43 and the second gear part 44 are arranged on the gear shaft 42. The first gear part 43 is meshed with the motor gear 23 for transmission, and the second gear part 44 is meshed with the rack part 31 for transmission. The first gear part 43 and the second gear part 44 form a double gear structure.

[0083] Optionally, the gear housing assembly 41 and the housing 1 can be integrated into one piece, thereby reducing the assembly steps of the gear housing assembly 41 and the housing 1, which is conducive to saving assembly time. Of course, the gear housing assembly 41 and the housing 1 can also be connected and fixed using fasteners such as bolts, rivets, and buckles.

[0084] In some embodiments of the present invention, at least one of the first gear portion 43 and the second gear portion 44 is a helical gear. For example, the first gear portion 43 is a helical gear and the second gear portion 44 is a spur gear; or, the first gear portion 43 is a spur gear and the second gear portion 44 is a helical gear; or, the first gear portion 43 is a spur gear and the second gear portion 44 is a helical gear; or, both the first gear portion 43 and the second gear portion 44 are helical gears. When the first gear portion 43 is a helical gear, the motor gear 23 meshing with the first gear portion 43 is also a helical gear. When the second gear portion 44 is a helical gear, the rack portion 31 meshing with the second gear portion 44 is a helical rack. Helical gears can reduce the stress of the gear teeth when they are meshed and extend the life of the gear teeth.

[0085] In some embodiments of the present invention, reference Figure 3-Figure 4 , Figure 6-Figure 7 , Fig.19 , Fig.24 As shown, the first gear portion 43 and the motor gear 23 are both bevel gears, thereby making the arrangement position of the first gear portion 43 more flexible.

[0086] In some embodiments of the present invention, reference Figure 3-Figure 4 , Figure 6-Figure 7 , Fig.19 , Fig.24 As shown, the diameter of the first gear portion 43 is greater than the diameter of the second gear portion 44 .

[0087] In some embodiments of the present invention, reference Figure 3-Figure 4 , Figure 6-Figure 7 , Fig.19 , Fig.24 As shown, the gear transmission mechanism 4 further includes a bearing, which is disposed on the gear shaft 42 , and the gear shaft 42 is rotatably supported on the gear housing assembly 41 through the bearing.

[0088] In some embodiments of the present invention, reference Figure 3-Figure 4 , Figure 6-Figure 7 , Fig.19 , Fig.24 As shown, the gear housing assembly 41 includes: a gear housing 411 and a gear end cover 412, and the gear housing 411 is connected to the housing 1, thereby realizing the installation and fixation of the gear transmission mechanism 4 on the housing 1. The gear housing 411 has a gear installation cavity 4113 and a housing opening 4114, and the housing opening 4114 is communicated with the gear installation cavity 4113. The gear end cover 412 is connected to the gear housing 411, and the gear end cover 412 is used to cover the housing opening 4114; wherein one end of the gear shaft 42 is supported by the gear housing 411, and the other end of the gear shaft 42 is supported by the gear end cover 412.

[0089] Reference Figure 3-Figure 4 , Figure 6 and Fig.10 As shown, the gear shaft 42 is rotatably disposed in the gear mounting cavity 4113, and the surface of the gear end cover 412 facing the gear mounting cavity 4113 is provided with an embedding groove 4124, and the embedding groove 4124 is recessed in the direction away from the gear mounting cavity 4113, and one end of the gear shaft 42 is embedded in the embedding groove 4124, thereby enabling the gear end cover 412 to support the gear shaft 42.

[0090] In some embodiments of the present invention, reference Figure 3-Figure 4 , Figure 6-Figure 9As shown, the gear housing 411 has an axial mounting surface 4111 and a circumferential mounting surface 4112. One end of the gear end cover 412 is suitable for abutting against the axial mounting surface 4111 of the housing. A retaining ring mounting groove 4115 is provided on the circumferential mounting surface 4112 of the housing. The gear housing assembly 41 also includes a fixed retaining ring 413, which is installed in the retaining ring mounting groove 4115. The fixed retaining ring 413 is used to limit the gear end cover 412 between the axial mounting surface 4111 of the housing and the fixed retaining ring 413.

[0091] In some embodiments of the present invention, reference Figure 3-Figure 4 , Figure 6-Figure 11 As shown, the gear end cover 412 is roughly disc-shaped, and includes an end cover body 4121 and an end cover insertion portion 4122. The end cover body 4121 is located between the housing axial mounting surface 4111 and the fixed snap ring 413. The end cover insertion portion 4122 is connected to the side of the end cover body 4121 facing the gear installation cavity 4113. The end cover insertion portion 4122 has an end cover circumferential mounting surface 41221, and a sealing structure is provided between the end cover circumferential mounting surface 41221 and the cavity wall of the gear installation cavity 4113. The outer diameter of the end cover insertion portion 4122 is smaller than the outer diameter of the end cover body 4121, so that the cross section of the gear end cover 412 is roughly in the shape of a "convex" character.

[0092] Reference Figure 4 , Fig. 9 , Fig.11 As shown, the connecting step surface between the end cover body 4121 and the end cover extension portion 4122 is the end cover axial mounting surface 4125, and the end cover axial mounting surface 4125 is suitable for abutting against the shell axial mounting surface 4111 to position the axial inner position of the gear end cover 412, and the fixing retaining ring 413 positions the axial outer position of the gear end cover 412.

[0093] In some embodiments of the present invention, reference Figure 4 , Fig. 9 , Fig.11 As shown, a sealing ring installation groove 4123 is provided on the circumferential installation surface 41221 of the end cover, and the sealing structure includes a sealing ring 414, which is installed in the sealing ring installation groove 4123, and the sealing ring 414 abuts against the cavity wall of the gear installation cavity 4113. By providing the sealing ring 414, the waterproof, dustproof and sealing effects of the matching part of the gear end cover 412 and the gear housing 411 can be significantly improved.

[0094] In some optional embodiments, the sealing structure may include a sealant or a sealing gasket.

[0095] In some embodiments of the present invention, the gear shaft 42 is rotatably supported on the gear housing 411 via a first bearing 45 ; and / or, the gear shaft 42 is rotatably supported on the gear end cover 412 via a second bearing.

[0096] exist Figure 3-Figure 4 , Figure 6 and Figure 8 In the illustrated embodiment, the gear shaft 42 is rotatably supported on the gear housing 411 through the first bearing 45, thereby reducing the rotation resistance of the gear shaft 42 and improving the motion stability. The gear housing 411 includes a first subsection 4116, a second subsection 4117, and a third subsection 4118. The third subsection 4118 connects the first subsection 4116 and the second subsection 4117. A connected gear installation cavity 4113 is formed in the first subsection 4116, the third subsection 4118, and the second subsection 4117. The first gear portion 43 is located in the first subsection 4116, the second gear portion 44 is located in the second subsection 4117, and the first bearing 45 is located in the third subsection 4118.

[0097] In some embodiments not shown in the figures, the gear shaft 42 can be rotatably supported in the embedding groove 4124 of the gear end cover 412 by a second bearing, thereby reducing the rotational resistance of the gear shaft 42 and improving the movement stability.

[0098] Specifically, the first gear portion 43 and the second gear portion 44 are arranged on the gear shaft 42, one end of the gear shaft 42 is a first guide section 421, the first guide section 421 is located on the side of the first gear portion 43 away from the second gear portion 44, and the other end is a second guide section 422, the second guide section 422 is located on the side of the second gear portion 44 away from the first gear portion 43. The first guide section 421 is embedded in the embedding groove 4124 of the gear end cover 412, and the second guide section 422 is located in the sub-section guide hole of the second sub-section 4117, so that the first gear portion 43 and the second gear portion 44 can stably rotate around the axis of the gear shaft 42.

[0099] Optionally, adding a bearing between the first guide section 421 and the embedding groove 4124 of the gear end cover 412 can reduce the rotation resistance of the gear shaft 42 and improve the stability of the rotation of the gear shaft 42. Similarly, adding a bearing between the sub-section guide hole of the second sub-section 4117 and the second guide section 422 can reduce the rotation resistance of the gear shaft 42 and improve the stability of the rotation of the gear shaft 42.

[0100] Optionally, the embedding groove 4124 is located at the center of the gear end cover 412, so that the gear shaft 42 is centrally arranged inside the gear housing assembly 41, and the dynamic balance is better.

[0101] Optionally, the first gear portion 43 may be integrally formed with the gear shaft 42, and the first gear portion 43 may also be mounted on the gear shaft 42 by interference fit, key connection, etc. Similarly, the second gear portion 44 may be integrally formed with the gear shaft 42, and the second gear portion 44 may also be mounted on the gear shaft 42 by interference fit, key connection, etc.

[0102] like Figure 6 The figure shows an exploded schematic diagram of the gear transmission mechanism 4, in which the first bearing 45 is installed on the gear shaft 42, and the first bearing 45 is located between the first gear portion 43 and the second gear portion 44, and then installed as a whole in the gear housing assembly 41; then the sealing ring 414 is installed in the sealing ring installation groove 4123 of the gear end cover 412, and then the gear end cover 412 with the sealing ring 414 is installed as a whole on the gear housing 411, and finally the fixing snap ring 413 is clamped in the snap ring installation groove 4115 of the gear housing 411, so that the gear end cover 412 is installed and fixed to the gear housing 411.

[0103] In some embodiments of the present invention, the angle between the axis of the gear shaft 42 and the reciprocating direction of the push rod 3 is greater than 0° and less than 180°. Figure 3 , Fig.19 , Fig.24 As shown, the angle between the axis of the gear shaft 42 and the reciprocating direction of the push rod 3 is α, and α satisfies the relationship: 0°<α<180°, which is conducive to saving the layout space of the gear shaft 42. Optionally, α can be 30°, 60°, 90°, 120°, 150°, etc. Of course, α can also be other values ​​greater than 0° and less than 180°, which are not listed here one by one.

[0104] In some embodiments of the present invention, reference Figure 1 , Fig.12 , Fig.18 , Fig.23 As shown, the shock absorber 10 also includes an adjustment mechanism 5, which includes: an adjustment screw 51 and an adjustment pressure block 52. The adjustment screw 51 is screwed to the housing 1. The adjustment pressure block 52 is located between the side of the push rod 3 that is away from the rack portion 31 and the adjustment screw 51, that is, the adjustment pressure block 52 pushes the side of the push rod 3 that is not provided with the rack portion 31, so as to prevent the adjustment pressure block 52 from interfering with the meshing of the second gear portion 44 and the rack portion 31. The adjustment screw 51 is used to adjust the thrust of the adjustment pressure block 52 on the push rod 3. When the rack portion 31 on the push rod 3 and the second gear portion 44 are worn to produce a gap, the adjustment screw 51 is rotated outside the housing 1, so that the adjustment pressure block 52 moves inward and presses the push rod 3, thereby eliminating the gap caused by the wear between the rack portion 31 and the second gear portion 44 on the push rod 3, so that the entire shock absorber 10 is in the best working state, reducing impact and abnormal noise.

[0105] In some embodiments of the present invention, reference Fig.12 As shown, the second housing portion 12 further includes an adjustment cylinder 122, which is connected to the guide cylinder 121. An adjustment cavity is provided in the adjustment cylinder 122, which is connected to the guide hole 1211. The adjustment screw 51 is screwed to the inner wall of the adjustment cavity. By screwing the adjustment screw 51, the depth of the adjustment screw 51 screwed into the adjustment cavity can be changed, thereby changing the position of the adjustment pressure block 52, so as to change the thrust of the adjustment pressure block 52 on the push rod 3.

[0106] In some embodiments of the present invention, reference Fig.12 As shown, a screw seal ring 53 is provided between the outer circumference of the adjusting screw 51 and the inner wall of the adjusting cavity. By providing the screw seal ring 53, the waterproof, dustproof and sealing effects of the matching point between the adjusting screw 51 and the inner wall of the adjusting cavity can be significantly improved.

[0107] In some embodiments of the present invention, the adjustment mechanism 5 is located on one axial side of the motor part 2. Figure 1 , Fig.12 , Fig.23 As shown, the gear transmission mechanism 4 is arranged on the axial side of the motor part 2, and the adjustment mechanism 5 is arranged near the gear transmission mechanism 4, thereby eliminating the gap caused by wear between the rack part 31 on the push rod 3 and the second gear part 44 on the axial side of the motor part 2, so that the entire shock absorber 10 is in the best working state, reducing impact and abnormal noise.

[0108] In some embodiments of the present invention, an adjustment mechanism 5 is provided on both axial sides of the motor part 2. Fig.18 As shown, gear transmission mechanisms 4 are provided on both axial sides of the motor part 2, and an adjustment mechanism 5 is provided near each gear transmission mechanism 4, thereby eliminating the gap caused by wear between the rack part 31 on the push rod 3 and the corresponding second gear part 44 on both axial sides of the motor part 2, so that the entire shock absorber 10 is in the best working state and the impact and abnormal noise are reduced.

[0109] In some embodiments of the present invention, the first housing portion 11 and the second housing portion 12 are an integral piece, thereby omitting the assembly steps of the first housing portion 11 and the second housing portion 12 , thus saving assembly time.

[0110] In some other embodiments of the present invention, the first housing portion 11 and the second housing portion 12 are separate parts. The first housing portion 11 and the second housing portion 12 can be connected and fixed by fasteners.

[0111] In some embodiments of the present invention, reference Figure 3 , Figure 13-Figure 17 As shown, the gear transmission mechanism 4 is located on one axial side of the motor part 2 .

[0112] like Fig.13 The figure shows a schematic diagram of the shock absorber 10 in the initial position, the contracted position, and the stretched position. The shock absorber 10 of the present invention is a coaxial fully active electromagnetic shock absorber. When the motor rotor 21 rotates, it drives the motor gear 23 to rotate. After the motor gear 23 rotates, it drives the first gear portion 43 on the gear shaft 42 to rotate. Because the first gear portion 43 and the second gear portion 44 are both installed on the gear shaft 42, the second gear portion 44 also rotates. Finally, the second gear portion 44 drives the rack portion 31 of the push rod 3 to move up and down. By controlling the rotation direction of the motor rotor 21, the shock absorber 10 can be controlled to stretch or shrink.

[0113] When the motor part 2 is not powered and the shock absorber 10 is subjected to external impact, the push rod 3 of the shock absorber 10 will in turn drive the motor rotor 21 to rotate. The motor rotor 21 is a permanent magnet. When the permanent magnet rotates, it cuts the coil to generate current. This part of energy can be recycled. At this time, the shock absorber 10 is in the energy feeding mode.

[0114] When the shock absorber 10 only needs to adjust the damping of the suspension assembly 100, a small current (relative to the current required for lifting) can be applied to the motor part 2 as needed. At this time, a motor damping force is generated in the motor part 2, so that the damping force of the suspension assembly 100 is in an ideal state, and finally the semi-active mode of the shock absorber 10 is realized, taking into account both comfort and energy consumption.

[0115] In some embodiments of the present invention, reference Figure 1-Figure 3 , Fig.13 , Figure 18-Figure 19 , Figure 23-Figure 24 As shown, the lower end of the second housing portion 12 protrudes downward from the first housing portion 11 .

[0116] like Fig.14 The figure shows a schematic diagram of a housing 1 of another coaxial fully active electromagnetic shock absorber 10 , in which the second gear portion 44 below the shock absorber 10 can be shortened to the lower end surface of the first gear portion 43 , thereby reducing the height of the entire shock absorber 10 in the Z direction.

[0117] like Figure 15-17 The figure shows another structural schematic diagram of a coaxial fully active electromagnetic shock absorber 10. In this scheme, one end of the push rod 3 extending out of the housing 1 is arranged on the upper side of the gear transmission mechanism 4, which can also achieve all the above functions.

[0118] Optionally, by adding oil and a damping valve etc. in the gap between the push rod 3 and the second housing portion 12, an additional oil damping can be added, thereby achieving more diverse functions.

[0119] Optionally, an air spring is added between the push rod 3 and the second housing portion 12 to achieve more functions.

[0120] According to the coaxial full-active electromagnetic shock absorber 10 of the embodiment of the present invention, the axis of the push rod 3 is arranged to coincide with the axis of the motor part 2, which is beneficial to reducing the overall Z-direction (i.e., the axial direction of the shock absorber 10) and radial dimensions of the shock absorber 10, and is convenient for the arrangement of the shock absorber 10 on the vehicle; the motor part 2 and the push rod 3 are transmitted through the gear transmission mechanism 4, which is convenient to process, has mature technology, and is easy to replace and repair; there is an adjustment mechanism 5 on the other side of the gear transmission mechanism 4. When the gear transmission mechanism 4 is worn, the adjustment mechanism 5 can compensate for the gap caused by the wear, so that the entire shock absorber 10 is in the best working state, reducing impact and abnormal noise.

[0121] In some embodiments of the present invention, reference Figure 18-Figure 20 , Figure 23-Figure 25 As shown, there are two gear transmission mechanisms 4, and the two gear transmission mechanisms 4 are separated on both axial sides of the motor part 2. The rack part 31 includes a first rack part 311 and a second rack part 312. The motor gear 23 includes a first motor gear 231 and a second motor gear 232. The gear transmission mechanism 4 on one axial side of the motor part 2 is suitable for transmission connection with the first motor gear 231 and the first rack part 311, and the gear transmission mechanism 4 on the other axial side of the motor part 2 is suitable for transmission connection with the second motor gear 232 and the second rack part 312.

[0122] Specifically, the gear transmission mechanism 4 on one axial side of the motor part 2 is a first gear transmission mechanism 4a, which is transmission-connected with the first motor gear 231 and the first rack part 311, and the gear transmission mechanism 4 on the other axial side of the motor part 2 is a second gear transmission mechanism 4b, which is transmission-connected with the second motor gear 232 and the second rack part 312. The first gear transmission mechanism 4a and the second gear transmission mechanism 4b have the same structure, which is conducive to simplifying the overall structure of the shock absorber 10.

[0123] The motor part 2 includes a motor rotor 21 and a motor stator 22. The motor rotor 21 is suitable for being connected and fixed to both the first motor gear 231 and the second motor gear 232. In this way, when the motor rotor 21 rotates, it can drive the first motor gear 231 and the second motor gear 232 to rotate synchronously.

[0124] The second gear portion 44a of the first gear transmission mechanism 4a meshes with the first rack portion 311 for transmission, and the second gear portion 44b of the second gear transmission mechanism 4b meshes with the second rack portion 312 for transmission, thereby jointly driving the push rod 3 to move linearly up and down.

[0125] Reference Figure 18-Figure 19 , Figure 23-Figure 24As shown, the gear housing assembly 41a of the first gear transmission mechanism 4a is connected to the housing 1, thereby realizing the installation and fixation of the first gear transmission mechanism 4a on the housing 1, and the first gear shaft 42a of the first gear transmission mechanism 4a is rotatably mounted on the gear housing assembly 41a. The gear housing assembly 41b of the second gear transmission mechanism 4b is connected to the housing 1, thereby realizing the installation and fixation of the second gear transmission mechanism 4b on the housing 1, and the second gear shaft 42b of the second gear transmission mechanism 4b is rotatably mounted on the gear housing assembly 41b.

[0126] In some embodiments of the present invention, the angle between the axis of the first gear shaft 42a of the first gear transmission mechanism 4a and the reciprocating movement direction of the push rod 3 is greater than 0° and less than 180°, for example, 30°, 60°, 90°, 120°, 150°, etc.

[0127] In some embodiments of the present invention, the angle between the axis of the second gear shaft 42b of the second gear transmission mechanism 4b and the reciprocating movement direction of the push rod 3 is greater than 0° and less than 180°, for example, 30°, 60°, 90°, 120°, 150°, etc.

[0128] According to the coaxial double-reduction structure electromagnetic shock absorber 10 of the embodiment of the present invention, the upper and lower ends of the motor part 2 are provided with gear transmission mechanisms 4 to drive the push rod 3 to move up and down, which is beneficial to reducing the stress between the second gear part 44 at each end and the corresponding rack part 31, making the stress distribution more uniform, and is beneficial to improving the life of the gear transmission mechanism 4. When the gear transmission mechanism 4 is worn, the clearance caused by the wear can be compensated by the adjustment mechanism 5, so that the entire shock absorber 10 is in the best working state, reducing the impact and abnormal noise.

[0129] In some embodiments of the present invention, reference Figure 1-Figure 3 , Figure 5 , Figure 13-Figure 22 As shown, the push rod 3 is an integrated piece, and the first rack portion 311 and the second rack portion 312 are both provided on the push rod 3 .

[0130] Fig.21 1 is a schematic diagram of the motion relationship between the first gear shaft 42a, the second gear shaft 42b and the push rod 3 when the shock absorber 10 with the integrated push rod 3 is contracted. Fig. 22Schematic diagram of the motion relationship between the first gear shaft 42a, the second gear shaft 42b and the push rod 3 when the shock absorber 10 with the integrated push rod 3 is stretched. Since the first motor gear 231 and the second motor gear 232 are both connected to the motor rotor 21, the rotation directions of the first motor gear 231 and the second motor gear 232 are consistent, and the first gear transmission mechanism 4a is arranged at the upper end of the first motor gear 231, and the second gear transmission mechanism 4b is arranged at the lower end of the second motor gear 232. In order to ensure that the first gear transmission mechanism 4a and the second gear transmission mechanism 4b drive the push rod 3 to move in the same direction after the motor rotor 21 rotates, it is necessary to make the double gear structure of the first gear transmission mechanism 4a and the double gear structure of the second gear transmission mechanism 4b as shown in FIG. Figure 21-22 As shown in the arrangement, that is, when the first gear portion 43a of the first gear transmission mechanism 4a and the first gear portion 43b of the second gear transmission mechanism 4b are on one side of the push rod 3, the second gear portion 44a of the first gear transmission mechanism 4a and the second gear portion 44b of the second gear transmission mechanism 4b are arranged on both sides of the push rod 3.

[0131] Alternatively, the double gear structure of the first gear transmission mechanism 4 a or the double gear structure of the second gear transmission mechanism 4 b may be arranged along the push rod 3 by being rotated by a certain angle, which does not affect the realization of the function of the gear transmission mechanism 4 . When the motor rotor 21 rotates, it drives the first motor gear 231 and the second motor gear 232 to rotate. After the first motor gear 231 and the second motor gear 232 rotate, they drive the first gear portion 43a of the first gear transmission mechanism 4a and the first gear portion 43b of the second gear transmission mechanism 4b to rotate. Because the first gear portion 43a and the second gear portion 44a of the first gear transmission mechanism 4a are integrated, and the first gear portion 43b and the second gear portion 44b of the second gear transmission mechanism 4b are integrated, the second gear portion 44a of the first gear transmission mechanism 4a and the second gear portion 44b of the second gear transmission mechanism 4b also rotate. Finally, the second gear portion 44a of the first gear transmission mechanism 4a drives the first rack portion 311 on the push rod 3 and the second gear portion 44b of the second gear transmission mechanism 4b drives the second rack portion 312 on the push rod 3 to move upward or downward in the same direction. By controlling the rotation direction of the motor rotor 21, the shock absorber 10 can be controlled to stretch or contract.

[0132] In some embodiments of the present invention, reference Figure 23-Figure 27 As shown, the push rod 3 includes a first push rod 32 and a second push rod 33 , the first rack portion 311 is provided on the first push rod 32 , the second rack portion 312 is provided on the second push rod 33 , and the first push rod 32 is spaced apart from the second push rod 33 in the axial direction.

[0133] In some embodiments of the present invention, a buffer block 6 is provided at one end of the first push rod 32 facing the second push rod 33; and / or a buffer block 6 is provided at one end of the second push rod 33 facing the first push rod 32. Fig.25 In the example of , the first push rod 32 is located above the second push rod 33, and a buffer block 6 is provided at the lower end of the first push rod 32 and the upper end of the second push rod 33. In some embodiments not shown in the figure, the buffer block 6 may be provided only at the lower end of the first push rod 32, or only at the upper end of the second push rod 33. By providing the buffer block 6, direct collision between the first push rod 32 and the second push rod 33 can be avoided. Optionally, the buffer block 6 may be a rubber block, a silicone block, etc.

[0134] In some embodiments of the present invention, reference Figure 23-Figure 27 As shown, the first push rod 32 is located above the second push rod 33, the first push rod 32 has a body connection structure 71, the body connection structure 71 is used to connect with the body of the vehicle 1000, and the second push rod 33 has a lower swing arm connection structure 72, the lower swing arm connection structure 72 is used to connect with the lower swing arm of the vehicle 1000. When the first push rod 32 and the second push rod 33 move relative to each other, the relative position between the body connection structure 71 and the lower swing arm connection structure 72 changes.

[0135] According to the coaxial double-push rod structure electromagnetic shock absorber 10 of the embodiment of the present invention, the upper end of the motor part 2 is provided with a first gear transmission mechanism 4a to drive the first push rod 32 to move up and down, and the lower end of the motor part 2 is provided with a second gear transmission mechanism 4b to drive the second push rod 33 to move up and down, so that the first push rod 32 and the second push rod 33 move in opposite directions. At the same rotation speed of the motor rotor 21, the relative movement speed of the upper and lower connection points of the shock absorber 10 (i.e., the vehicle body connection structure 71 and the lower swing arm connection structure 72) can be increased to twice that of the single push rod 3 assembly shock absorber 10, and it is beneficial to increase the stroke of the shock absorber 10.

[0136] Fig.26 Schematic diagram of the motion relationship between the first gear shaft 42a, the second gear shaft 42b and the push rod 3 when the shock absorber 10 with double push rods contracts. Fig. 27Schematic diagram of the motion relationship between the first gear shaft 42a, the second gear shaft 42b and the push rod 3 when the shock absorber 10 with double push rods is stretched. Since the first motor gear 231 and the second motor gear 232 are both connected to the motor rotor 21, the rotation directions of the first motor gear 231 and the second motor gear 232 are consistent, and the first gear transmission mechanism 4a is arranged at the upper end of the first motor gear 231, and the second gear transmission mechanism 4b is arranged at the lower end of the second motor gear 232. In order to ensure that the first gear transmission mechanism 4a and the second gear transmission mechanism 4b drive the push rod 3 to move in opposite directions after the motor rotor 21 rotates, it is necessary to set the double gear structure of the first gear transmission mechanism 4a and the double gear structure of the second gear transmission mechanism 4b as shown in FIG. Figure 26-Figure 27 As shown in the arrangement, that is, when the first gear portion 43a of the first gear transmission mechanism 4a and the first gear portion 43b of the second gear transmission mechanism 4b are on one side of the push rod 3, the second gear portion 44a of the first gear transmission mechanism 4a and the second gear portion 44b of the second gear transmission mechanism 4b are arranged on the same side of the push rod 3.

[0137] Alternatively, the double gear structure of the first gear transmission mechanism 4 a or the double gear structure of the second gear transmission mechanism 4 b may be arranged along the push rod 3 by being rotated by a certain angle, which does not affect the realization of the function of the gear transmission mechanism 4 . When the motor rotor 21 rotates, it drives the first motor gear 231 and the second motor gear 232 to rotate. After the first motor gear 231 and the second motor gear 232 rotate, they drive the first gear portion 43a of the first gear transmission mechanism 4a and the first gear portion 43b of the second gear transmission mechanism 4b to rotate. Because the first gear portion 43a and the second gear portion 44a of the first gear transmission mechanism 4a are integrated, and the first gear portion 43b and the second gear portion 44b of the second gear transmission mechanism 4b are integrated, the second gear portion 44a of the first gear transmission mechanism 4a and the second gear portion 44b of the second gear transmission mechanism 4b also rotate. Finally, the second gear portion 44a of the first gear transmission mechanism 4a drives the first rack portion 311 on the first push rod 32 and the second gear portion 44b of the second gear transmission mechanism 4b drives the second rack portion 312 on the second push rod 33 to move upward or downward in opposite directions. By controlling the rotation direction of the motor rotor 21, the shock absorber 10 can be controlled to stretch or contract.

[0138] In some embodiments of the present invention, the first rack portion 311 and the second rack portion 312 are located on the same radial side of the push rod 3. Figure 25-27 As shown, the second gear portion 44 a of the first gear transmission mechanism 4 a and the second gear portion 44 b of the second gear transmission mechanism 4 b are arranged on the same radial side of the push rod 3 .

[0139] In some embodiments of the present invention, the first rack portion 311 and the second rack portion 312 are located on opposite sides of the push rod 3 in the radial direction. Figure 20-22 As shown, the second gear portion 44 a of the first gear transmission mechanism 4 a and the second gear portion 44 b of the second gear transmission mechanism 4 b are arranged on both sides of the push rod 3 .

[0140] In some embodiments of the present invention, one of the housing 1 and the push rod 3 has a vehicle body connection structure 71, and the other has a lower swing arm connection structure 72. Figure 1-Figure 3 , Figure 13-14 In the embodiment shown, the lower end of the push rod 3 extends out of the housing 1, the lower end of the push rod 3 has a lower swing arm connection structure 72, and the upper end of the housing 1 has a body connection structure 71. Figure 1-Figure 3 , Figure 13-14 , Figure 18-Figure 19 In the illustrated embodiment, the upper end of the push rod 3 extends out of the housing 1 , the upper end of the push rod 3 has a vehicle body connection structure 71 , and the lower end of the housing 1 has a lower swing arm connection structure 72 .

[0141] When the push rod 3 moves linearly in the up-down direction, the relative position between the vehicle body connection structure 71 and the lower swing arm connection structure 72 changes.

[0142] Optionally, the vehicle body connection structure 71 may be a plain hole, a threaded hole, a screw, or the like.

[0143] Optionally, the lower swing arm connection structure 72 may be a plain hole, a threaded hole, a screw, etc.

[0144] Reference Fig.28 As shown, the suspension assembly 100 according to the second embodiment of the present invention includes the shock absorber 10 of the above embodiment.

[0145] According to the suspension assembly 100 of the embodiment of the present invention, by arranging the push rod 3 of the shock absorber 10 coaxially with the motor part 2, the radial dimension of the shock absorber 10 can be reduced, so that the structure of the shock absorber 10 is compact, and the structure of the suspension assembly 100 is further compact.

[0146] Reference Fig.29 As shown, a vehicle 1000 according to an embodiment of the third aspect of the present invention comprises the suspension assembly 100 of the above embodiment.

[0147] According to the vehicle 1000 of the embodiment of the present invention, by arranging the push rod 3 of the shock absorber 10 coaxially with the motor part 2, the radial dimension of the shock absorber 10 can be reduced, so that the structures of the shock absorber 10 and the suspension assembly 100 are compact.

[0148] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0149] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0150] In the description of this specification, the description with reference to the terms "some embodiments" or "examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0151] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A shock absorber, characterized in that: include: Housing (1); A motor part (2), wherein the motor part (2) is mounted on the housing (1); A push rod (3), the push rod (3) being mounted on the housing (1), the push rod (3) being coaxially arranged with the motor part (2), and the push rod (3) being provided with a rack part (31); and A gear transmission mechanism (4), the gear transmission mechanism (4) is transmission-connected to the motor part (2), and the gear transmission mechanism (4) is also transmission-connected to the rack part (31).

2. The shock absorber according to claim 1, characterized in that: The housing (1) comprises a first housing portion (11) and a second housing portion (12) which are connected to each other; the motor portion (2) is mounted on the first housing portion (11); and the push rod (3) is mounted on the second housing portion (12).

3. The shock absorber according to claim 2, characterized in that: The second housing portion (12) comprises a guide cylinder (121), the motor portion (2) is sleeved outside the guide cylinder (121), the guide cylinder (121) has a guide hole (1211) coaxially arranged with the motor portion (2), and the push rod (3) is at least partially arranged in the guide hole (1211) and can reciprocate along the axial direction of the guide hole (1211).

4. The shock absorber according to claim 1, characterized in that: The motor part (2) comprises a motor rotor (21), a motor stator (22) and a motor gear (23); the motor rotor (21) is rotatable relative to the motor stator (22); the motor gear (23) is connected and fixed to the motor rotor (21); and the gear transmission mechanism (4) is meshed with the motor gear (23) for transmission.

5. The shock absorber according to claim 4, characterized in that The gear transmission mechanism (4) comprises: A gear housing assembly (41), wherein the gear housing assembly (41) is connected to the housing (1); a gear shaft (42), the gear shaft (42) being supported by the gear housing assembly (41); A first gear portion (43) and a second gear portion (44), wherein the first gear portion (43) and the second gear portion (44) are arranged on the gear shaft (42), the first gear portion (43) meshes with the motor gear (23) for transmission, and the second gear portion (44) meshes with the rack portion (31) for transmission.

6. The shock absorber according to claim 5, characterized in that At least one of the first gear portion (43) and the second gear portion (44) is a helical gear.

7. The vibration absorber according to claim 5, characterized in that: The gear transmission mechanism (4) further comprises a bearing, wherein the bearing is arranged on the gear shaft (42), and the gear shaft (42) is rotatably supported on the gear housing assembly (41) via the bearing.

8. The vibration absorber according to claim 5, characterized in that: The gear housing assembly (41) comprises: A gear housing (411), the gear housing (411) having a gear installation cavity (4113) and a housing opening (4114) communicating with the gear installation cavity (4113); and A gear end cover (412), the gear end cover (412) being connected to the gear housing (411) and used for sealing the housing opening (4114); One end of the gear shaft (42) is supported on the gear housing (411), and the other end of the gear shaft (42) is supported on the gear end cover (412).

9. The vibration absorber according to claim 8, characterized in that The gear housing (411) has a housing axial mounting surface (4111) and a housing circumferential mounting surface (4112); one end of the gear end cover (412) is suitable for abutting against the housing axial mounting surface (4111); a retaining ring mounting groove (4115) is provided on the housing circumferential mounting surface (4112); the gear housing assembly (41) further comprises a fixed retaining ring (413); the fixed retaining ring (413) is installed in the retaining ring mounting groove (4115) and is used to restrict the gear end cover (412) between the housing axial mounting surface (4111) and the fixed retaining ring (413).

10. The vibration absorber according to claim 9, characterized in that The gear end cover (412) comprises an end cover body (4121) and an end cover extension portion (4122), wherein the end cover body (4121) is located between the axial mounting surface (4111) of the housing and the fixing retaining ring (413), and the end cover extension portion (4122) is connected to the side of the end cover body (4121) facing the gear mounting cavity (4113), and the end cover extension portion (4122) has an end cover circumferential mounting surface (41221), and a sealing structure is provided between the end cover circumferential mounting surface (41221) and the cavity wall of the gear mounting cavity (4113).

11. The shock absorber according to claim 10, characterized in that A sealing ring installation groove (4123) is provided on the circumferential installation surface (41221) of the end cover, and the sealing structure comprises a sealing ring (414). The sealing ring (414) is installed in the sealing ring installation groove (4123) and abuts against the cavity wall of the gear installation cavity (4113).

12. The shock absorber according to claim 8, characterized in that The gear shaft (42) is rotatably supported on the gear housing (411) via a first bearing (45); and / or, the gear shaft (42) is rotatably supported on the gear end cover (412) via a second bearing.

13. The vibration absorber according to claim 5, characterized in that The angle between the axis of the gear shaft (42) and the reciprocating direction of the push rod (3) is greater than 0° and less than 180°.

14. The shock absorber according to claim 3, characterized in that The shock absorber further comprises an adjusting mechanism (5), wherein the adjusting mechanism (5) comprises: an adjusting screw (51), wherein the adjusting screw (51) is threadedly connected to the housing (1); and An adjusting pressure block (52) is located between a side of the push rod (3) facing away from the rack portion (31) and the adjusting screw (51), and the adjusting screw (51) is used to adjust the thrust of the adjusting pressure block (52) on the push rod (3).

15. The shock absorber according to claim 14, characterized in that The second shell portion (12) further comprises an adjusting cylinder (122), wherein the adjusting cylinder (122) is connected to the guide cylinder (121), an adjusting cavity is provided in the adjusting cylinder (122), the adjusting cavity is communicated with the guide hole (1211), and the adjusting screw (51) is threadedly connected to the inner cavity wall of the adjusting cavity.

16. The shock absorber according to claim 15, characterized in that A screw seal ring (53) is provided between the outer peripheral surface of the adjusting screw (51) and the inner cavity wall of the adjusting cavity.

17. The vibration absorber according to claim 14, characterized in that The adjustment mechanism (5) is located on one axial side of the motor part (2).

18. The vibration absorber according to claim 14, characterized in that The adjustment mechanism (5) is provided on both axial sides of the motor part (2).

19. The vibration absorber according to claim 2, characterized in that The first shell part (11) and the second shell part (12) are an integral part; or the first shell part (11) and the second shell part (12) are separate parts.

20. The vibration absorber according to claim 1, characterized in that The gear transmission mechanism (4) is located on one axial side of the motor part (2).

21. The vibration absorber according to claim 4, characterized in that There are two gear transmission mechanisms (4), and the two gear transmission mechanisms (4) are located on both sides of the axial direction of the motor part (2); the rack part (31) includes a first rack part (311) and a second rack part (312); the motor gear (23) includes a first motor gear (231) and a second motor gear (232); the gear transmission mechanism (4) on one side of the axial direction of the motor part (2) is suitable for transmission connection with the first motor gear (231) and the first rack part (311); the gear transmission mechanism (4) on the other side of the axial direction of the motor part (2) is suitable for transmission connection with the second motor gear (232) and the second rack part (312).

22. The vibration absorber according to claim 21, characterized in that The push rod (3) is an integral piece, and the first rack portion (311) and the second rack portion (312) are both arranged on the push rod (3).

23. The vibration absorber according to claim 21, characterized in that The push rod (3) comprises a first push rod (32) and a second push rod (33), the first rack portion (311) is provided on the first push rod (32), the second rack portion (312) is provided on the second push rod (33), and the first push rod (32) and the second push rod (33) are spaced apart in the axial direction.

24. The vibration absorber according to claim 23, characterized in that A buffer block (6) is provided at one end of the first push rod (32) facing the second push rod (33); and / or a buffer block (6) is provided at one end of the second push rod (33) facing the first push rod (32).

25. The vibration absorber according to claim 23, characterized in that The first push rod (32) is located above the second push rod (33), the first push rod (32) has a vehicle body connection structure (71), and the second push rod (33) has a lower swing arm connection structure (72).

26. The vibration absorber according to claim 23, characterized in that The first rack portion (311) and the second rack portion (312) are located on the same radial side of the push rod (3).

27. The vibration absorber according to claim 21, characterized in that The first rack portion (311) and the second rack portion (312) are located on two opposite sides of the push rod (3) in the radial direction.

28. The vibration absorber according to any one of claims 1 to 27, characterized in that One of the housing (1) and the push rod (3) has a vehicle body connection structure (71), and the other has a lower swing arm connection structure (72).

29. A suspension assembly, characterized in that: A vibration absorber comprising the vibration absorber according to any one of claims 1 to 28.

30. A vehicle, characterized in that: Includes the suspension assembly as described in claim 29.

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