Macpherson air spring strut assembly and vehicle

Abstract

Provided are a MacPherson air spring strut assembly and a vehicle. The MacPherson air spring strut assembly comprises a spring body (100), a mounting assembly (200), and a damper rod assembly (300). The mounting assembly (200) comprises a rotation assembly and a mounting plate (240) sleeved on the rotation assembly. The mounting plate (240) is fixedly connected to a vehicle body. The spring body (100), the damper rod assembly (300), and the rotation assembly are rotatable relative to the mounting plate (240). The relative rotation structure of said MacPherson air spring strut assembly is simple and highly stable.

Description

McPherson air spring strut assembly and vehicle Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a McPherson air spring strut assembly and a vehicle. Background Art

[0002] As people's demand for vehicles has increased significantly, the requirements for vehicle comfort and handling have also become higher and higher. McPherson air springs have been widely used in the field of vehicle technology. The McPherson air spring uses the high air pressure, compressibility, and flushability of sealed air to achieve static load-bearing and dynamic rebound. It has the function of mitigating impact and reducing vibration, achieving consistency in the natural frequency of the vehicle body, and improving ride comfort. At the same time, the McPherson air spring also needs to assume the steering function during vehicle driving: it rotates relative to the vehicle body components when the vehicle turns. Therefore, the rotational connection method between the McPherson air spring and the vehicle body has become a difficult point in this technical field. Therefore, it is necessary to provide an improved McPherson air spring strut assembly and vehicle to solve the above problems.

[0003] Summary of the Invention

[0004] The present application provides a McPherson air spring strut assembly and a vehicle with a simple structure and strong stability.

[0005] The present application discloses a McPherson air spring strut assembly, comprising a spring body, a mounting assembly, and a damper rod assembly. The mounting assembly comprises a rotating assembly and a mounting plate sleeved on the rotating assembly. The mounting plate is fixedly connected to the vehicle body. The spring body, the damper rod assembly, and the rotating assembly can rotate relative to the mounting plate.

[0006] Furthermore, the rotating assembly includes a lower mounting seat and an upper mounting seat, and the upper mounting seat is arranged on the outer side of the lower mounting seat and is threadedly sleeved with the lower mounting seat.

[0007] Furthermore, the upper mounting seat is provided with a plurality of through holes, and the lower mounting seat is provided with a plurality of positioning holes. Positioning screws pass through the through holes and are inserted into the positioning holes for rotational positioning between the upper mounting seat and the lower mounting seat.

[0008] Furthermore, the circle formed by the centers of all the positioning holes and the circle formed by the centers of all the through holes are concentric circles and have the same radius; the relationship between the angle α formed by the centers of adjacent through holes reaching the centers of the concentric circles and the angle β formed by the centers of adjacent positioning holes to the centers of the concentric circles is: α≠β.

[0009] Furthermore, the upper mounting seat is arranged above the mounting plate, an upper bearing assembly is arranged between the upper mounting seat and the mounting plate, and a lower bearing assembly is arranged between the lower mounting seat and the mounting plate.

[0010] Furthermore, the lower bearing assembly includes a third seat ring fixed to the mounting plate, a fourth seat ring fixed to the lower mounting seat, and a second sliding ring arranged between the third seat ring and the fourth seat ring. The longitudinal cross-section of the third seat ring and the fourth seat ring is L-shaped, and the second sliding ring is radially arranged.

[0011] Furthermore, the lower mounting seat includes a lower stop portion protruding radially outward, and an upper top seat is provided on the upper part of the spring body. The upper end of the lower stop portion slides with the lower bearing assembly, and the lower end of the lower stop portion abuts against the upper top seat.

[0012] Furthermore, the rotating assembly further includes a sealing cover, and the sealing cover is fixed on the lower mounting seat through the upper mounting seat.

[0013] Furthermore, a third sealing member is provided between the sealing cover and the lower mounting seat; the upper mounting seat includes an annular crimping portion and a connecting portion, the crimping portion is located above the lower mounting seat and the sealing cover, and the height of the connecting portion is lower than the height of the crimping portion; the connecting portion is slidably fitted with the upper bearing assembly.

[0014] Furthermore, the upper mounting seat also includes an outer stop portion, one end of the connecting portion is provided with an internal thread, and the outer stop portion is arranged on one side of the other end of the connecting portion; the lower mounting seat includes a mounting main ring and a lower stop portion, the upper end of the outer wall of the mounting main ring is provided with an external thread matching the internal thread, the lower end of the mounting main ring is used to connect the air spring assembly, and the lower stop portion is arranged on the outer wall of the middle part of the mounting main ring; the mounting main ring, the lower stop portion, the connecting portion and the outer stop portion together constitute a mounting groove, and the mounting plate is inserted into the mounting groove through between the lower stop portion and the outer stop portion.

[0015] Furthermore, the upper mounting seat further includes a reinforcing rib, one end of the reinforcing rib is connected to the outer side of the crimping portion, and the other end of the reinforcing rib is connected to the outer side of the connecting portion.

[0016] Furthermore, the damper rod assembly includes a piston rod, the upper end of which is fixed to the inside of the lower mounting seat by a top glue; the bottom of the sealing cover is provided with a longitudinally extending abutment portion, which abuts against the top glue.

[0017] Furthermore, the mounting plate is installed between the upper mounting seat and the lower mounting seat, and the upper mounting seat and the lower mounting seat can rotate relative to the mounting plate; the top height of the mounting plate is lower than the top height of the lower mounting seat.

[0018] Furthermore, the spring body includes a lower end seat connected to the damper rod assembly, and the lower end seat and the damper rod assembly are arranged at an angle.

[0019] Furthermore, the spring body includes an upper top seat, a bladder skin and a dust cover located outside the bladder skin, the upper top seat includes a support body and an end plate extending radially outward from the support body; a fourth seal is provided between the support body and the lower mounting seat, and the end plate is connected to the dust cover.

[0020] Furthermore, it also includes an additional air chamber assembly, which is fixed to the upper part of the mounting component and communicates with the spring body through the mounting component; the mounting component and the spring body and the additional air chamber assembly are all sealed.

[0021] Furthermore, a main air chamber is formed in the spring body, and a secondary air chamber is formed in the additional air chamber assembly, and the main air chamber can be communicated with the secondary air chamber.

[0022] Furthermore, the mounting assembly further comprises a sealing cover fixed to the additional air chamber assembly, a gas channel being formed between the sealing cover and the additional air chamber assembly; the sealing cover and the additional air chamber assembly are fixed by snap-fitting or by mounting bolts.

[0023] Furthermore, a first sealing member and a second sealing member are provided between the sealing cover and the additional air chamber assembly, and the first sealing member and the second sealing member are respectively located on both sides of the gas channel.

[0024] Furthermore, a connecting cavity connected to the spring body is formed in the sealing cover; a plurality of first air vents are provided on a side of the auxiliary air chamber close to the sealing cover, and a plurality of second air vents are provided on a side of the connecting cavity close to the additional air chamber assembly, and the second air vents are connected to the first air vents.

[0025] Furthermore, an annular transition cavity is formed between the sealing cover and the additional air chamber assembly, and the transition cavity is respectively connected to the first air vent and the second air vent; the sealing cover includes a first sealing portion and a second sealing portion extending from top to bottom, the side surface of the first sealing portion forms a first sealing surface, and the top surface of the second sealing portion forms a second step surface, and the first sealing surface, the second step surface and the additional air chamber assembly together form the transition cavity.

[0026] Furthermore, the sealing cover includes a third sealing portion extending into the lower mounting seat, and a third sealing member is arranged between the third sealing portion and the lower mounting seat; the bottom of the additional air chamber assembly is arranged close to the top of the upper mounting seat; the upper mounting seat is crimped on the third sealing portion; a limiting member is provided between the lower mounting seat and the sealing cover, and the limiting member is used to limit the relative rotation between the lower mounting seat and the sealing cover.

[0027] Furthermore, it also includes a solenoid valve, which is arranged inside the additional air chamber assembly and is used to control the connection and disconnection of the main air chamber and the auxiliary air chamber.

[0028] Furthermore, the central axis of the mounting assembly coincides with the central axis of the damper rod assembly, and the central axis of the spring body and the central axis of the damper rod assembly are arranged obliquely.

[0029] The present application also discloses a vehicle including the McPherson air spring strut assembly as described above.

[0030] The McPherson air spring strut assembly and vehicle assembly of this application are equipped with a rotating assembly and a mounting plate fixedly connected to the vehicle body. By rotating the mounting plate relative to the spring body, damper rod assembly, and rotating assembly, the McPherson air spring strut assembly and vehicle body can rotate relative to each other when the vehicle turns. The McPherson air spring strut assembly of this application has a simple relative rotation structure and a reliable connection. Furthermore, since the mounting plate has no direct connection to the main air chamber in the spring body, airtightness issues do not need to be considered, effectively reducing the difficulty of design and manufacturing.

[0031] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0033] FIG1 is a perspective view of a first embodiment of a McPherson air spring strut assembly according to the present invention.

[0034] FIG2 is a cross-sectional view of the McPherson air spring strut assembly in FIG1 .

[0035] FIG3 is a partial enlarged view of point A in FIG2 .

[0036] FIG4 is a partial enlarged view of the upper portion of the McPherson air spring strut assembly in FIG2 .

[0037] FIG5 is a partial enlarged view of the additional air chamber assembly and the mounting assembly in FIG2 .

[0038] FIG6 is a cross-sectional view of the upper mounting seat of the mounting assembly of the present application.

[0039] FIG. 7 is a top view of the upper mounting seat of the mounting assembly of the present application.

[0040] FIG8 is a cross-sectional view of the lower mounting seat of the mounting assembly of the present application.

[0041] FIG9 is a top view of the lower mounting seat of the mounting assembly of the present application.

[0042] FIG10 is a schematic diagram of the assembly of the upper mounting seat and the lower mounting seat of the mounting assembly of the present application.

[0043] FIG11 is a partial enlarged view of point B in FIG2 .

[0044] FIG12 is a partial enlarged view of point C in FIG2 .

[0045] FIG13 is a perspective view of a second embodiment of the McPherson air spring strut assembly of the present application.

[0046] FIG14 is a cross-sectional view of the McPherson air spring strut assembly in FIG13 .

[0047] FIG15 is a partially enlarged view of FIG14 .

[0048] Description of Figure Numbers:

[0049] 100, spring body; 110, main air chamber; 120, upper top seat; 121, support body; 122, end plate; 123, first buckling portion; 124, first buckling ring; 125, push ring; 130, lower end seat; 131, receiving hole; 132, second buckling portion; 133, second buckling ring; 140, bladder skin; 150, dust cover; 200, mounting assembly; 210, lower mounting seat; 211, lower stopper; 212, upper connecting portion; 213, lower connecting portion; 2131, fourth sealing member; 214, positioning hole; 215, mounting main ring; 22 0, sealing cover; 220', sealing cover; 221, connecting cavity; 221', connecting cavity; 222, first sealing portion; 2221, first sealing member; 2222, first step surface; 2223, first sealing surface; 2224, mounting bolt; 223, second sealing portion; 2231, second sealing member; 2232, second step surface; 2233, second sealing surface; 2234, second vent hole; 2235, stopper; 224, third sealing portion; 2241, third sealing member; 2241', third sealing member; 2242, third step surface; 2 242', third step surface; 2243, third sealing surface; 2243', third sealing surface; 225, abutment portion; 225', abutment portion; 230, upper mounting seat; 231, crimping portion; 2311, positioning screw; 232, connecting portion; 2321, outer stop portion; 233, reinforcing rib; 234, through hole; 240, mounting plate; 241, clamping portion; 242, bending portion; 243, first limiting portion; 244, second limiting portion; 245, protrusion; 2451, lug; 246, second fastener; 247, first annular groove; 248 , second annular groove; 250, upper bearing assembly; 251, first seat ring; 252, second seat ring; 253, first sliding ring; 254, first buffer; 260, lower bearing assembly; 261, third seat ring; 262, fourth seat ring; 263, second sliding ring; 264, second buffer; 270, mounting groove; 300, damper rod assembly; 310, piston rod; 311, fourth fastener; 312, fifth sealing member; 313, sealing gasket; 320, oil storage cylinder; 330, top glue; 340, buffer block; 350, damper sealing cover;

[0050] 400, additional air chamber assembly; 410, auxiliary air chamber; 420, inner wall; 421, accommodating space; 430, outer wall; 440, supporting wall; 450, connecting wall; 460, solenoid valve; 470, first vent hole; 480, adapter cavity. 500, longitudinal axis. DETAILED DESCRIPTION

[0051] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0052] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this specification. Unless otherwise defined, technical or scientific terms used in this specification should have the ordinary meaning understood by a person of ordinary skill in the art to which this application belongs. The terms "first," "second," and similar terms used in this specification and claims do not denote any order, quantity, or importance, but are simply used to distinguish different components. Similarly, terms such as "a" or "an" do not denote a limitation of quantity, but rather indicate the presence of one. "Multiple" or "several" means two or more. Unless otherwise indicated, terms such as "front," "rear," "lower," and / or "upper" are for convenience only and are not intended to limit to a single position or spatial orientation. Terms such as "include" or "comprising" mean that the elements or objects preceding the term "include" or "comprising" include the elements or objects listed after the term and their equivalents, and do not exclude other elements or objects. Terms such as "connected" or "connected" are not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect.

[0053] The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit this specification. As used in this specification and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0054] Next, the embodiments of the present application are described in detail.

[0055] As shown in FIG. 1 and FIG. 2 , the present application provides a McPherson air spring strut assembly, including a spring body 100 , a mounting assembly 200 , a damper rod assembly 300 , and an additional air chamber assembly 400 .

[0056] The mounting assembly 200 is mounted above the spring body 100, and the damper rod assembly 300 is mounted below the spring body 100. The additional air chamber assembly 400 is mounted above the mounting assembly 200 and communicates with the spring body 100 through the mounting assembly 200. The mounting assembly 200, spring body 100, and additional air chamber assembly 400 are all sealed. The mounting assembly 200 is fixedly connected to the vehicle body, and the lower end of the damper rod assembly 300 is fixedly connected to the vehicle's steering knuckle. A main air chamber 110 is formed within the spring body 100, and a secondary air chamber 410 is formed within the additional air chamber assembly 400. The secondary air chamber 410 can selectively communicate with the main air chamber 110.

[0057] The McPherson air spring strut assembly of the present application has a longitudinal axis 500. The central axes of the mounting assembly 200, the damper rod assembly 300, and the additional air chamber assembly 400 all coincide with the longitudinal axis 500. The central axis of the spring body 100 is arranged at an angle to the longitudinal axis 500.

[0058] Referring simultaneously to Figures 2, 3, 11, and 12, the spring body 100 includes an upper seat 120, a lower end seat 130, a bladder 140, and a dust cover 150. The upper seat 120 is disposed at the top of the spring body 100 and is fixedly connected to the mounting assembly 200. The lower end seat 130 is disposed at the bottom of the spring body 100 and is fixedly connected to the damper rod assembly 300. The upper end of the bladder 140 is sealedly connected to the upper seat 120, and the lower end is sealedly connected to the lower end seat 130, forming the main air chamber 110. The dust cover 150 is located outside the bladder 140.

[0059] The upper support 120 comprises a support body 121, an end plate 122, a first retaining portion 123, a first retaining ring 124, and a push ring 125. The support body 121 is fixed to the mounting assembly 200, with a fourth seal 2131 interposed therebetween. The end plate 122 extends radially from the outer end of the support body 121 and is sealed to the outer side of the dust cover 150.

[0060] The first buckling portion 123 extends longitudinally from the bottom of the support body 121. A serrated groove is provided on the outside of the first buckling portion 123, and one end of the bladder skin 140 is overlapped and provided outside the serrated groove. It can be understood that the "outside" in this application refers to the side away from the longitudinal axis 500. The first buckling ring 124 is sleeved on the outside of the bladder skin 140, pressing one end of the bladder skin 140 to the outside of the first buckling portion 123, thereby achieving a sealed connection between the bladder skin 140 and the upper seat 120. The push ring 125 is provided at the bottom of the end plate 122, located on the outside of the first buckling portion 123. After being inflated, the bladder skin 140 abuts against the push ring 125 and folds over.

[0061] The push ring 125 comprises an inner ring and an outer ring. One end of the inner ring is connected to one end of the outer ring, forming a sharp corner in its vertical cross-section. The sharp corner is inserted into a bend of the bladder skin 140. The outer ring abuts against the bent portion of the bladder skin 140, providing support for the bladder skin 140. The second bend of the bladder skin 140 is completed on the outer ring. Depending on the stress on the bladder skin 140, the external bend can be achieved at any position on the outer ring. To prevent the sharp corner from damaging the bladder skin 140, the sharp corner is rounded.

[0062] The push ring 125 supports the bladder skin 140. The push ring 125 bends the bladder skin 140 into an S-shape at the bend, making it easier and more convenient to offset the force applied to the bladder skin 140. The push ring 125 is fixedly connected to the upper seat 120 by welding, interference fit, snap connection, or other methods.

[0063] A second retaining portion 132 and a second retaining ring 133 are provided on the upper portion of the lower end seat 130. A serrated groove is formed on the outer side of the second retaining portion 132, and the other end of the bladder cover 140 overlaps and is positioned outside the serrated groove. The second retaining ring 133 fits over the bladder cover 140, pressing the other end of the bladder cover 140 against the second retaining portion 132, achieving a sealed connection between the bladder cover 140 and the lower end seat 130.

[0064] The upper seat 120 supports the air spring 140 and dust cover 150 and transmits force to the air spring 140. The air spring 140 rolls on the lower seat 130, changing the air spring's characteristics during movement. The first retaining ring 124 and the second retaining ring 133 seal the air spring 140 against the upper seat 120 and the lower seat 130, respectively. The lower seat 130 is connected to the oil reservoir 320, supporting the main body of the air spring. The air spring's characteristics are altered by changing the shape of the lower seat 130 in contact with the air spring 140.

[0065] The lower end seat 130 is tilted relative to the damper rod assembly 300. Specifically, the lower end seat 130 is provided with an eccentrically arranged receiving hole 131. The central axis of the receiving hole 131 is offset from the central axis of the lower end seat 130, and the two are tilted relative to each other. The receiving hole 131 is used to accommodate the damper rod assembly 300. After assembly, the central axis of the receiving hole 131 is located on the longitudinal axis 500. The central axis of the lower end seat 130 is therefore also tilted relative to the longitudinal axis 500, thereby causing the lower portion of the spring body 100 to be offset from the longitudinal axis 500. Furthermore, the lower end seat 130 is tilted relative to the damper rod assembly 300 at a certain angle, so that the central axis of the spring body 100 does not coincide with the central axis of the damper rod assembly 300 (i.e., the longitudinal axis 500). In this way, the McPherson air spring assembly can provide a certain lateral force to meet the lateral force requirement of the damper rod assembly 300 , provide protection for the damper rod assembly 300 , and avoid premature damage to the damper rod assembly 300 .

[0066] During vehicle motion, the bladder skin 140 moves along the longitudinal axis 500 on the lower end seat 130 to achieve vehicle bouncing. The folding of the bladder skin 140 on both the upper and lower sides enhances the connection strength and stability between the bladder skin 140 and the upper seat 120, increasing the elasticity and deformation capacity of the spring body 100. This helps improve the cushioning effect, shock absorption capacity, and disturbance resistance of the McPherson air spring strut assembly. It also reduces stress and damage to the spring body 100, thereby extending its service life.

[0067] Specifically, in this embodiment, when the bladder skin 140 is subjected to a tensile force, the force acting between the bladder skin 140 and the upper seat 120 can be reduced by reducing its bend. When the bladder skin 140 is subjected to a compressive force, the force acting between the bladder skin 140 and the upper seat 120 can be reduced by increasing its bend. In other words, both the compressive and tensile forces are offset to a certain extent by the changes in the bend, thereby preventing the force from acting at the connection between the bladder skin 140 and the upper seat 120 and improving the strength and stability of the connection between the bladder skin 140 and the upper seat 120.

[0068] The dust cover 150 is a bellows, one end of which is connected or clamped to the outside of the end plate 122 and the other end of which is connected or clamped to the bottom of the lower end seat 130. The dust cover 150 can expand or contract with the up and down movement of the lower end seat 130, and can prevent impurities or foreign matter from entering the lower end seat 130, thereby avoiding damage to the bladder 140 caused by external wear.

[0069] Referring to Figures 4 and 5 , the mounting assembly 200 is disposed above the spring body 100 and includes a rotating assembly and a mounting plate 240 that fits over the rotating assembly. The rotating assembly includes a lower mounting seat 210, a sealing cover 220, an upper mounting seat 230, and a mounting plate 240. The mounting plate 240 is fixedly connected to the vehicle body, and the spring body 100, the damper rod assembly 300, and the rotating assembly can rotate relative to the mounting plate 240.

[0070] The lower end of the lower mounting seat 210 is fixedly connected to the spring body 100, and the upper end is fixedly connected to the upper mounting seat 230. The sealing cover 220 is fixed to the lower mounting seat 210 through the upper mounting seat 230. The mounting plate 240 is mounted on the outer side of the lower mounting seat 210 and connected to the vehicle body to secure the McPherson air spring strut assembly to the vehicle body. An upper bearing assembly 250 is disposed between the upper mounting seat 230 and the mounting plate 240, and a lower bearing assembly 260 is disposed between the mounting plate 240 and the lower mounting seat 210.

[0071] Referring to Figures 8 and 9 simultaneously, the lower mounting seat 210 includes a lower stop 211 that protrudes radially outward and a main mounting ring 215. The lower stop 211 is disposed on the outer wall of the middle portion of the main mounting ring 215. The main mounting ring 215 includes an upper connecting portion 212 that extends upward from the inner side of the lower stop 211 and a lower connecting portion 213 that extends downward from the inner side of the lower stop 211. The upper end of the lower stop 211 slides with the lower bearing assembly 260, while the lower end engages with the upper top seat 120. The upper connecting portion 212 is sleeved onto the outer side of the sealing cover 220 and is further secured to the sealing cover 220 by being secured to the upper mounting seat 230. The lower connecting portion 213 is secured to the spring body 100.

[0072] A fourth seal 2131 is installed between the lower mounting seat 210 and the upper support 120 to isolate the main air chamber 110 from the outside world. Specifically, the lower connecting portion 213 is provided with an annular groove, within which the fourth seal 2131 is positioned. During assembly, the lower mounting seat 210 is inserted into the inner cavity of the upper support 120. The fourth seal 2131 is positioned between the lower connecting portion 213 and the support body 121, sealing the mounting assembly 200 from the spring body 100. Furthermore, a limiter is provided between the lower mounting seat 210 and the upper support 120 to prevent relative rotation between the two. The fourth seal 2131 is essentially a static seal.

[0073] A connecting cavity 221 is formed within the sealing cover 220, through which the auxiliary air chamber 410 communicates with the main air chamber 110. A gas channel is formed between the sealing cover 220 and the additional air chamber assembly 400. A first sealing member 2221 and a second sealing member 2231 are located on either side of the gas channel, ensuring a tight seal between the auxiliary air chamber 410 and the connecting cavity 221.

[0074] The sealing cover 220 includes a first sealing portion 222, a second sealing portion 223, and a third sealing portion 224 extending sequentially from top to bottom. The first sealing portion 222 protrudes into the additional air chamber assembly 400 and includes a transversely disposed first stepped surface 2222 and a first sealing surface 2223 extending downwardly from the first stepped surface 2222. The first sealing surface 2223 is provided with an annular groove that mates with the inner wall 420. The first sealing member 2221 is disposed in the annular groove between the first sealing surface 2223 and the inner wall 420.

[0075] The second sealing portion 223 is connected to the lower end of the first sealing portion 222 and includes a second stepped surface 2232 extending radially from the first sealing surface 2223 and a second sealing surface 2233 extending downwardly from the second stepped surface 2232. A gas passage passes through the second stepped surface 2232. The second sealing surface 2233 is provided with an annular groove that mates with the support wall 440 of the additional air chamber assembly 400. The second sealing member 2231 is disposed in the annular groove between the second sealing surface 2233 and the support wall 440.

[0076] The third sealing portion 224 extends from the lower end of the second sealing portion 223 into the lower mounting seat 210 and includes a third stepped surface 2242 extending radially from the second sealing surface 2233 and a third sealing surface 2243 extending downward from the third stepped surface 2242. The upper mounting seat 230 is crimped onto the third sealing portion 224. The third stepped surface 2242 is located below the crimping portion 231 of the upper mounting seat 230. The upper mounting seat 230 secures the sealing cover 220 to the lower mounting seat 210. The third sealing surface 2243 is provided with an annular groove that mates with the upper connecting portion 212. The third sealing member 2241 is disposed within the annular groove between the third sealing surface 2243 and the upper connecting portion 212. The lower end of the third sealing portion 224 abuts the top seal 330 to limit deformation of the top seal 330. The third sealing member 2241 essentially provides a static seal.

[0077] In this embodiment, the first seal 2221, the second seal 2231, and the third seal 2241 are all disposed on one side of the longitudinally extending sealing surface of the sealing cover 220. The three seals provide a circumferential interference fit with the sealing cover 220, the additional air chamber assembly 400, and the lower mounting seat 210. This, on the one hand, achieves a seal between the sealing cover 220, the additional air chamber assembly 400, and the lower mounting seat 210, thereby isolating the air chamber within the McPherson air spring strut assembly from the outside world and preventing leakage or infiltration of liquids, gases, or other substances through the connection. On the other hand, this effectively prevents longitudinal relative displacement between the sealing cover 220 and the additional air chamber assembly 400, and between the sealing cover 220 and the lower mounting seat 210, improving the connection and ensuring the stability and reliability of the three connections.

[0078] In some cases, the seals may also have other settings, such as: the first seal 2221 can be set between the connecting wall 450 of the additional air chamber assembly 400 and the first step surface 2222; the second seal 2231 can be set between the additional air chamber assembly 400 and the second step surface 2232; the third seal 2241 can be set between the third step surface 2242 and the crimping portion 231 of the upper mounting seat 230.

[0079] 6, 7, and 10, the upper mounting seat 230 covers the outside of the lower mounting seat 210 and the sealing cover 220 and is located above the mounting plate 240, securing the sealing cover 220 to the lower mounting seat 210. The inner side of the upper mounting seat 230 and the outer side of the upper connecting portion 212 are provided with corresponding threads, and the upper mounting seat 230 is secured to the lower mounting seat 210 via the threads.

[0080] The upper mounting seat 230 includes a crimping portion 231, a connecting portion 232, and a plurality of reinforcing ribs 233. Both the crimping portion 231 and the connecting portion 232 are annular. The crimping portion 231 is located above the lower mounting seat 210 and the sealing cover 220. A positioning screw 2311 passes from top to bottom through the crimping portion 231 and engages with the upper connecting portion 212 to further secure the upper mounting seat 230 to the lower mounting seat 210. Simultaneously, the bottom of the crimping portion 231 abuts against the sealing cover 220, pressing the sealing cover 220 tightly against the lower mounting seat 210.

[0081] The connecting portion 232 is disposed outside the crimping portion 231 and slidably engages the upper bearing assembly 250. The height of the connecting portion 232 is lower than that of the crimping portion 231. The outer side of the connecting portion 232 is bent downward to form an outer stop 2321, which limits the position of the upper bearing assembly 250. Several reinforcing ribs 233 are disposed on the upper surface of the connecting portion 232 and extend radially, gradually sloping downward from the inside out, enhancing the structural strength of the upper mounting base 230.

[0082] One end of the connecting portion 232 is provided with an internal thread, and an external stop 2321 is provided on one side of the other end of the connecting portion 232. The upper end of the outer wall of the main mounting ring 215 is provided with an external thread that matches the internal thread. The internal thread on the connecting portion 232 mates with the external thread on the main mounting ring 215, enabling a threaded connection between the connecting portion 232 and the main mounting ring 215, thereby achieving a threaded connection between the upper mounting seat 230 and the lower mounting seat 210.

[0083] By threading the upper mounting seat 230 and the lower mounting seat 210, when the upper bearing assembly 250 or the lower bearing assembly 260 in the mounting groove 270 wears the upper mounting seat 230 or the lower mounting seat 210, causing the gap in the mounting groove 270 to increase, the gap can be adjusted by adjusting the threaded connection position between the upper mounting seat 230 and the lower mounting seat 210, so that the mounting plate 240 will not vibrate in the mounting groove 270, thereby reducing the occurrence of abnormal noise.

[0084] Furthermore, a plurality of through holes 234 are provided on the upper mounting seat 230 , and a plurality of positioning holes 214 are provided on the lower mounting seat 210 . The positioning screws 2311 pass through the through holes 234 and are inserted into the positioning holes 214 for rotational positioning between the upper mounting seat 230 and the lower mounting seat 210 .

[0085] In this embodiment, the upper mounting seat 230 has a plurality of through holes 234, and the lower mounting seat 210 has a plurality of positioning holes 214. After the upper mounting seat 230 and the lower mounting seat 210 are rotated into place through threaded connection, the through holes 234 correspond to the positioning holes 214, and the positioning top screws 2311 pass through the through holes 234 and are inserted into the positioning holes 214, which serves to limit the relative rotation between the upper mounting seat 230 and the lower mounting seat 210, thereby preventing the threaded connection between the upper mounting seat 230 and the lower mounting seat 210 from loosening.

[0086] In this embodiment, the through hole 234 can be a straight hole or a threaded hole, or an internal thread that matches the positioning screw 2311 can be set in the positioning hole 214.

[0087] In an optional embodiment, the circle formed by the centers of all the positioning holes 214 and the circle formed by the centers of all the through holes 234 are concentric circles and have the same radius; as shown in FIG7 , the angle α formed by the centers of the adjacent through holes 234 reaching the centers of the concentric circles is, as shown in FIG9 , an angle β formed by the centers of the adjacent positioning holes 214 to the centers of the concentric circles. The relationship between the angle α and the angle β is:

[0088] α≠β.

[0089] Since the upper mounting seat 230 and the lower mounting seat 210 are threadedly connected, after the upper bearing assembly 250 or the lower bearing assembly 260 is worn, the relative position between the upper mounting seat 230 and the lower mounting seat 210 needs to be adjusted to reduce the gap. Therefore, the fixed position between the upper mounting seat 230 and the lower mounting seat 210 after relative rotation is not fixed.

[0090] In order to ensure that the positioning screw 2311 can pass through the through hole 234 and be inserted into the positioning hole 214, thereby realizing the rotation limit between the upper mounting seat 230 and the lower mounting seat 210, in this embodiment, the angles of the angle α and the angle β are set to be different, as shown in Figures 7 and 9. Such a setting method enables the upper mounting seat 230 and the lower mounting seat 210 to correspond to any through hole 234 and any positioning hole 214 at any position after relative rotation. At this time, the positioning screw 2311 can be inserted into the corresponding through hole 234 and positioning hole 214.

[0091] That is to say, as long as there is a through hole 234 corresponding to the positioning hole 214 and a positioning screw 2311 can be inserted, the rotational positioning between the upper mounting seat 230 and the lower mounting seat 210 can be achieved.

[0092] The mounting plate 240 is mounted between the upper mounting seat 230 and the lower mounting seat 210 and is rotatably connected thereto. Specifically, a mounting groove 270 is formed between the upper mounting seat 230 and the lower mounting seat 210, and one end of the mounting plate 240 is disposed within the mounting groove 270. The mounting groove 270 includes a first annular groove 247 and a second annular groove 248. The mounting main ring 215, the lower stop 211, the connecting portion 232, and the outer stop 2321 collectively form the mounting groove 270. The mounting plate 240 is inserted into the mounting groove 270 through the space between the outer stop 2321 and the lower stop 211.

[0093] An upper bearing assembly 250 is disposed between the upper mounting seat 230 and the mounting plate 240. A first annular groove 247 is formed between the mounting plate 240 and the connecting portion 232 to accommodate the upper bearing assembly 250. A lower bearing assembly 260 is disposed between the mounting plate 240 and the lower mounting seat 210. A second annular groove 248 is formed between the mounting plate 240 and the lower stop 211 to accommodate the lower bearing assembly 260.

[0094] Specifically, the top of the mounting plate 240 is lower than the top of the lower mounting base 210. The mounting plate 240 includes a clamping portion 241, a bent portion 242, a first stopper 243, a second stopper 244, and a protruding portion 245. The clamping portion 241 is positioned between the upper bearing assembly 250 and the lower bearing assembly 260. A first annular groove 247 is positioned above the clamping portion 241, and a second annular groove 248 is positioned below the clamping portion 241.

[0095] The bending portion 242 extends upward from the inner side of the clamping portion 241. The first limiting portion 243 extends upward from the outer side of the clamping portion 241. The first limiting portion 243 and the outer stop portion 2321 are correspondingly arranged, and the two together limit the upper bearing assembly 250. The connecting portion 232 is arranged opposite to the clamping portion 241. In this way, the clamping portion 241, the bending portion 242, the first limiting portion 243, the connecting portion 232 and the outer stop portion 2321 together form a first annular groove 247. The second limiting portion 244 extends downward from the outer side of the clamping portion 241. The lower stop portion 211 is arranged opposite to the clamping portion 241. In this way, the clamping portion 241, the second limiting portion 244 and the lower stop portion 211 together form a second annular groove 248.

[0096] The protrusion 245 is disposed on the periphery of the clamping portion 241 and is provided with a plurality of second fasteners 246 for connection to the vehicle body. The protrusion 245 extends radially outward to form a plurality of lugs 2451. The second fasteners 246 are passed through the lugs 2451.

[0097] It will be appreciated that, along the longitudinal axis 500, mounting plate 240 is located in the middle of mounting assembly 200. It is compressed from above by components such as upper bearing assembly 250 and upper mounting seat 230, and supported from below by components such as lower bearing assembly 260 and lower stop 211. This allows mounting plate 240 to better absorb and disperse external forces when connected to the vehicle body, enhancing the stability of the connection between the entire McPherson air spring and the vehicle body and preventing separation of the air spring from the vehicle body due to excessive vehicle movement.

[0098] The upper bearing assembly 250 is disposed between the upper mounting seat 230 and the mounting plate 240 and transmits axial and rotational forces therebetween. The upper bearing assembly 250 includes a first race 251 fixed to the upper mounting seat 230, a second race 252 fixed to the mounting plate 240, and a first sliding ring 253 disposed between the first race 251 and the second race 252. Specifically, the first race 251 is relatively fixed to the connecting portion 232, and the second race 252 is relatively fixed to the clamping portion 241. The first race 251 and the second race 252 are relatively rotatable about the longitudinal axis 500 via the first sliding ring 253. The upper mounting seat 230 and the mounting plate 240 can achieve relative rotation about the longitudinal axis 500 via the upper bearing assembly 250.

[0099] Furthermore, the upper bearing assembly 250 includes a first buffer member 254 disposed between the second race 252 and the mounting plate 240. The side of the first buffer member 254 proximal to the second race 252 abuts against the second race 252. A protrusion is provided on the side of the first buffer member 254 proximal to the mounting plate 240 to abut against the mounting plate 240. The first buffer member 254 can be configured as an elastic structure to absorb noise or vibration from the upper mounting seat 230 and the mounting plate 240, thereby improving NVH performance and ensuring a more stable connection of the upper bearing assembly 250.

[0100] The lower bearing assembly 260 is disposed between the mounting plate 240 and the lower mounting seat 210 and transmits axial, radial, and rotational forces therebetween. The lower bearing assembly 260 includes a third race 261 fixed to the mounting plate 240, a fourth race 262 fixed to the lower mounting seat 210, and a second sliding ring 263 disposed between the third race 261 and the fourth race 262. Specifically, the third race 261 is relatively fixed to the clamping portion 241, and the fourth race 262 is relatively fixed to the lower stop portion 211. The third race 261 and the fourth race 262 are relatively rotatable about the longitudinal axis 500 via the second sliding ring 263. The mounting plate 240 and the lower mounting seat 210 can achieve relative rotation about the longitudinal axis 500 via the lower bearing assembly 260.

[0101] When the McPherson air spring strut assembly is subjected to force, the force from the suspension is transmitted to the lower mounting seat 210 via the damper rod assembly 300 and the spring body 100. The lower stop 211 receives force from the upper support 120 and abuts upward against the lower bearing assembly 260. Therefore, the McPherson air spring strut assembly of the present application places higher demands on the rigidity, sliding smoothness, and force transmission path of the lower bearing assembly 260. In this embodiment, the third race 261 and the fourth race 262 have an L-shaped cross-section in the longitudinal direction. A radially extending section is positioned between the lower stop 211 and the clamping portion 241, and a longitudinally extending section is positioned between the upper connecting portion 212 and the bent portion 242. The second sliding ring 263 is radially disposed. This allows force to be transmitted between the lower mounting seat 210 and the mounting plate 240 both longitudinally and transversely, further stabilizing their relative rotation.

[0102] Furthermore, lower bearing assembly 260 includes a second buffer member 264 disposed between mounting plate 240 and third race 261. The upper and lower sides of second buffer member 264 respectively engage with mounting plate 240 and third race 261. Second buffer member 264 can be configured as an elastic structure to absorb noise or vibration from mounting plate 240 and lower mounting base 210, thereby improving NVH performance and ensuring a more stable connection of lower bearing assembly 260.

[0103] The upper bearing assembly 250 and the lower bearing assembly 260 enable relative rotation of the mounting plate 240 relative to the upper mounting seat 230 and the lower mounting seat 210 about the longitudinal axis 500. Because the upper mounting seat 230, the lower mounting seat 210, and the sealing cover 220 are fixed, the mounting plate 240 and the sealing cover 220 also rotate relative to each other about the longitudinal axis 500. Both the upper bearing assembly 250 and the lower bearing assembly 260 are planar bearings, effectively reducing torsional forces during movement of the McPherson air spring assembly and increasing the rotation angle to ±45°. They also operate stably within the first annular groove 247 and the second annular groove 248 without disengaging. Both the upper bearing assembly 250 and the lower bearing assembly 260 are pre-compressed, generating a certain preload force.

[0104] The damper rod assembly 300 is disposed at the lower portion of the spring body 100 and partially extends into the spring body 100 , and includes a piston rod 310 , an oil storage cylinder 320 , a top rubber 330 , a buffer block 340 and a damper sealing cover 350 .

[0105] The piston rod 310 and oil reservoir 320 extend from the receiving hole 131 into the main air chamber 110. A top rubber 330 is press-fitted into the inner cavity of the lower mounting seat 210 and secured to the upper end of the piston rod 310 via a fourth fastener 311. The upper end of the piston rod 310 is secured to the interior of the lower mounting seat 210 by the top rubber 330. During vehicle operation, the deformation of the top rubber 330 enables the damper rod assembly 300 to oscillate. The top of the top rubber 330 abuts the sealing cover 220 via the abutment portion 225, preventing excessive deformation of the top rubber 330.

[0106] The oil reservoir 320 is wrapped around the lower portion of the piston rod 310 and is connected to the lower end seat 130. The oil reservoir 320 at least partially defines a damping chamber that contains a certain amount of damping fluid. An annular groove is provided at the lower portion of the lower end seat 130. The fifth seal 312 and the sealing gasket 313 are placed in the annular groove to achieve a sealed connection with the oil reservoir 320, thereby isolating the main air chamber 110 from the outside world. The fifth seal 312 is essentially a static seal. At the same time, a limiting device is provided between the lower end seat 130 and the oil reservoir 320 to limit the relative rotation between the two, so that the lower end seat 130 and the oil reservoir 320 are relatively fixed.

[0107] The buffer block 340 is pressed into the lower portion of the lower mounting seat 210 by interference, thereby achieving buffering and limiting during vehicle bouncing. The damper sealing cover 350 is pressed onto the oil storage cylinder 320 by interference.

[0108] The additional air chamber assembly 400 includes an inner wall 420, an outer wall 430, a support wall 440, a connecting wall 450, and a solenoid valve 460 located within the additional air chamber assembly 400. A sealed auxiliary air chamber 410 is formed between the inner wall 420 and the outer wall 430. The support wall 440 is disposed at the lower end of the additional air chamber assembly 400 and protrudes beyond the auxiliary air chamber 410. The connecting wall 450 is radially arranged to connect the annular inner wall 420. The inner side of the inner wall 420 encloses a receiving space 421, which is located above the connecting wall 450. The first step surface 2222 is located below the connecting wall 450.

[0109] The solenoid valve 460 is disposed within the accommodating space 421 and is used to control the connection and disconnection between the main air chamber 110 and the auxiliary air chamber 410. When the main air chamber 110 and the auxiliary air chamber 410 are disconnected, the McPherson air spring strut assembly is a single-chamber setting, in which case only the main air chamber 110 is used to adjust the stiffness of the air spring and achieve the cushioning and vibration reduction effect. When the main air chamber 110 and the auxiliary air chamber 410 are connected, the McPherson air spring strut assembly is a dual-chamber setting, in which case the main air chamber 110 and the auxiliary air chamber 410 work together to enhance the vibration reduction effect through a larger air chamber space. By providing the additional air chamber assembly 400, a dual-chamber setting of the McPherson air spring strut assembly is achieved, and further, a two-stage variable stiffness of the air spring is achieved, thereby enhancing the flexibility and comfort of the McPherson air spring strut assembly.

[0110] The shape of the additional air chamber assembly 400 is not restricted and can be flexibly designed according to actual needs. In this embodiment, the walls of the additional air chamber assembly 400 and the cavity formed therein are all arranged symmetrically along the circumferential direction of the longitudinal axis 500. The inner wall 420 and the outer wall 430 are both cylindrical and coaxially arranged, and the accommodating space 421 is a columnar space. By providing a circumferentially symmetrical additional air chamber assembly 400, it is possible to achieve a balance in air pressure and a balance in load distribution, so that the force on the McPherson air spring strut assembly is more balanced, further improving comfort and stability, and avoiding deformation or imbalance caused by uneven load distribution. The additional air chamber assembly 400 is made of plastic as a whole, which will not affect the performance of the McPherson air spring strut assembly while reducing the weight of the entire vehicle.

[0111] The additional air chamber assembly 400 is secured to the sealing cover 220. The sealing cover 220 and the additional air chamber assembly 400 can be secured by snapping or fastening. In this embodiment, the sealing cover 220 and the additional air chamber assembly 400 are secured by mounting bolts 2224. The mounting bolts 2224 pass from top to bottom through the connecting wall 450 and the first stepped surface 2222 and engage the first sealing portion 222, thereby securing the additional air chamber assembly 400 to the sealing cover 220.

[0112] A plurality of first vent holes 470 are provided on the side of the secondary air chamber 410 near the sealing cover 220. A plurality of second vent holes 2234 are provided on the side of the communication cavity 221 near the additional air chamber assembly 400. The second vent holes 2234 communicate with the first vent holes 470. The first vent holes 470 and the second vent holes 2234 are evenly distributed circumferentially around the longitudinal axis 500.

[0113] Furthermore, a sealed annular transition cavity 480 is formed between the sealing cover 220 and the additional air chamber assembly 400. This transition cavity 480 communicates with the first vent 470 and the second vent 2234, respectively. This transition cavity 480 provides a buffer space for gas exchange between the first vent 470 and the second vent 2234. During actual assembly, precise alignment of the first vent 470 and the second vent 2234 is not necessary to achieve efficient gas flow, thus expanding design space and improving assembly efficiency.

[0114] Specifically, the outer end of the second stepped surface 2232 protrudes upward to form a stopper 2235. The stopper 2235 abuts against the additional air chamber assembly 400, creating a longitudinal gap between the second stepped surface 2232 and the additional air chamber assembly 400. The second stepped surface 2232, the stopper 2235, the first sealing surface 2223, and the additional air chamber assembly 400 collectively form a transition cavity 480.

[0115] The gas passage of this embodiment is formed by the first vent hole 470, the second vent hole 2234, and the adapter cavity 480. It is understood that this embodiment only provides one arrangement of the gas passage. In other cases, those skilled in the art may design other specific structures of the gas passage according to actual needs, as long as the communication between the main gas chamber 110 and the auxiliary gas chamber 410 is achieved.

[0116] The bottom of the additional air chamber assembly 400 is arranged close to the top of the upper mounting seat 230, making the overall structure of the McPherson air spring strut assembly more compact, saving space, reducing costs, and at the same time improving the response speed and energy transfer efficiency of the air spring, making the stiffness adjustment of the air spring more flexible and efficient, and more stable.

[0117] Compared with the first embodiment, the McPherson air spring strut assembly of the second embodiment is only different in the structure of the sealing cover 220' and eliminates the additional air chamber assembly 400. Therefore, only the sealing cover 220' is described here, and other parts are not repeated.

[0118] As shown in Figures 13, 14, and 15, a sealing cover 220' is located within the lower mounting seat 210 and cooperates with the upper mounting seat 230 to seal the upper end of the McPherson air spring strut assembly. A connecting cavity 221' is formed within the sealing cover 220', which communicates with the main air chamber 110.

[0119] A third sealing member 2241' is disposed between the sealing cover 220' and the lower mounting seat 210. Specifically, in this embodiment, the sealing cover 220' includes a transversely disposed third step surface 2242' and a third sealing surface 2243' extending downwardly from the third step surface 2242'. The height of the third step surface 2242' is no higher than the top of the lower mounting seat 210. This arrangement allows the upper mounting seat 230 to simultaneously press against the third step surface 2242' when secured to the lower mounting seat 210, thereby limiting the sealing cover 220' and crimping and securing the sealing cover 220' to the lower mounting seat 210. The third sealing surface 2243' is in contact with the upper connecting portion 212, and the third sealing member 2241' is disposed between the third sealing surface 2243' and the upper connecting portion 212. The third sealing member 2241' essentially provides a static seal.

[0120] Furthermore, a longitudinally extending abutment portion 225' is provided at the bottom of the sealing cover 220'. The abutment portion 225' abuts against the damper rod assembly 300 to limit the longitudinal movement of the damper rod assembly 300. A limiter (not shown) is provided between the lower mounting seat 210 and the sealing cover 220' to limit the relative rotation between the lower mounting seat 210 and the sealing cover 220'.

[0121] The present application also provides a vehicle comprising the McPherson air spring strut assembly as described above.

[0122] The McPherson air spring strut assembly and vehicle of the present application are provided with an additional air chamber assembly 400. The auxiliary air chamber 410 in the additional air chamber assembly 400 can be connected to the main air chamber 110 in the spring body 100, so that the overall air chamber volume of the McPherson air spring can be changed, and the stiffness of the McPherson air spring strut assembly can be adjusted, thereby improving the stability and comfort of the McPherson air spring strut assembly in different application scenarios.

[0123] Furthermore, by positioning the mounting assembly 200 and the additional air chamber assembly 400 above the spring body 100, the additional air chamber assembly 400 does not affect the connection, sealing, or movement between the spring body 100 and the mounting assembly 200, resulting in a more compact and streamlined overall structure for the McPherson air spring strut assembly. During assembly, only the additional air chamber assembly 400 and the sealing cap 220 need to be sealed and connected, significantly simplifying the assembly process for the additional air chamber assembly 400 and improving manufacturing efficiency.

[0124] Taking Example 1 as an example, the McPherson air spring strut assembly of the present application includes, from top to bottom, a first seal 2221, a second seal 2231, a third seal 2241, a fourth seal 2131, and a fifth seal 312. These seals seal the additional air chamber assembly 400 and the mounting assembly 200, the sealing cover 220' within the mounting assembly 200 and the lower mounting seat 210, the mounting assembly 200 and the spring body 100, and the spring body 100 and the damper rod assembly 300, effectively isolating the main air chamber 110 and the auxiliary air chamber 410 from the outside world. All five seals are O-rings with strong sealing performance and are static seals, which improves sealing reliability, increases the service life of the seals, and reduces the requirements for their use.

[0125] Furthermore, the McPherson air spring strut assembly and vehicle of the present application utilize a mounting assembly 200 connecting the spring body 100 and the damper rod assembly 300, with an upper bearing assembly 250 and a lower bearing assembly 260 disposed on the upper and lower sides of the mounting plate 240, respectively. This allows for relative rotation between the mounting plate 240 and the upper and lower mounting seats 230 and 210, enabling the McPherson air spring strut assembly to rotate relative to the vehicle body when the vehicle turns. The McPherson air spring strut assembly of the present application features a simple relative rotation structure and a reliable connection. Furthermore, since the mounting plate 240 is not directly connected to the main air chamber 110 within the spring body 100, there is no need to consider airtightness during rotation of the mounting plate 240, effectively reducing the difficulty of design and manufacturing.

[0126] The above description is merely a preferred embodiment of the present application and does not constitute any form of limitation to the present application. Although the present application has been disclosed as a preferred embodiment as above, it is not intended to limit the present application. Any technician familiar with this profession can make some changes or modifications to the equivalent embodiment of the above-disclosed technical content without departing from the scope of the technical solution of the present application. However, any simple modification, equivalent change and modification of the above embodiment based on the technical essence of the present application that does not depart from the content of the technical solution of the present application still falls within the scope of the technical solution of the present application.

Claims

1. A McPherson air spring strut assembly, characterized in that: It includes a spring body, a mounting assembly and a damper rod assembly. The mounting assembly includes a rotating assembly and a mounting plate sleeved on the rotating assembly. The mounting plate is fixedly connected to the vehicle body. The spring body, the damper rod assembly and the rotating assembly can rotate relative to the mounting plate.

2. The McPherson air spring strut assembly according to claim 1, characterized in that: The rotating assembly comprises a lower mounting seat and an upper mounting seat, wherein the upper mounting seat is arranged on the outer side of the lower mounting seat and is threadedly sleeved with the lower mounting seat.

3. The McPherson air spring strut assembly according to claim 2, characterized in that: The upper mounting seat is provided with a plurality of through holes, and the lower mounting seat is provided with a plurality of positioning holes. Positioning screws pass through the through holes and are inserted into the positioning holes for rotationally positioning the upper mounting seat and the lower mounting seat.

4. The McPherson air spring strut assembly according to claim 3, characterized in that: The circle formed by the centers of all the positioning holes and the circle formed by the centers of all the through holes are concentric circles with the same radius; the relationship between the angle α formed by the centers of adjacent through holes reaching the centers of the concentric circles and the angle β formed by the centers of adjacent positioning holes to the centers of the concentric circles is: α≠β.

5. The McPherson air spring strut assembly according to claim 2, characterized in that: The upper mounting seat is arranged above the mounting plate, an upper bearing assembly is arranged between the upper mounting seat and the mounting plate, and a lower bearing assembly is arranged between the lower mounting seat and the mounting plate.

6. The McPherson air spring strut assembly according to claim 5, characterized in that: The lower bearing assembly includes a third seat ring fixed to the mounting plate, a fourth seat ring fixed to the lower mounting seat, and a second sliding ring arranged between the third seat ring and the fourth seat ring. The third seat ring and the fourth seat ring have an L-shaped cross-section in the longitudinal direction, and the second sliding ring is radially arranged.

7. The McPherson air spring strut assembly according to claim 5, characterized in that: The lower mounting seat comprises a lower stopper protruding radially outward, an upper top seat is arranged on the upper part of the spring body, the upper end of the lower stopper is slidably matched with the lower bearing assembly, and the lower end of the lower stopper is in contact with the upper top seat.

8. The McPherson air spring strut assembly according to claim 5, characterized in that: The rotating assembly further comprises a sealing cover, and the sealing cover is fixed on the lower mounting seat through the upper mounting seat.

9. The McPherson air spring strut assembly according to claim 8, characterized in that: A third sealing member is provided between the sealing cover and the lower mounting seat; the upper mounting seat comprises an annular crimping portion and a connecting portion, the crimping portion is located above the lower mounting seat and the sealing cover, and the height of the connecting portion is lower than the height of the crimping portion; the connecting portion is slidably matched with the upper bearing assembly.

10. The McPherson air spring strut assembly according to claim 9, characterized in that: The upper mounting seat also includes an outer stopper, one end of the connecting portion is provided with an internal thread, and the outer stopper is arranged on one side of the other end of the connecting portion; the lower mounting seat includes a mounting main ring and a lower stopper, the upper end of the outer wall of the mounting main ring is provided with an external thread matching the internal thread, the lower end of the mounting main ring is used to connect the air spring assembly, and the lower stopper is arranged on the outer wall of the middle part of the mounting main ring; the mounting main ring, the lower stopper, the connecting portion and the outer stopper together constitute a mounting groove, and the mounting plate is inserted into the mounting groove through the lower stopper and the outer stopper.

11. The McPherson air spring strut assembly according to claim 9, characterized in that: The upper mounting seat further comprises a reinforcing rib, one end of which is connected to the outer side of the crimping portion, and the other end of which is connected to the outer side of the connecting portion.

12. The McPherson air spring strut assembly according to claim 8, characterized in that: The damper rod assembly comprises a piston rod, the upper end of which is fixed to the interior of the lower mounting seat by a top rubber; a longitudinally extending abutment portion is provided at the bottom of the sealing cover, and the abutment portion abuts against the top rubber.

13. The McPherson air spring strut assembly according to claim 2, characterized in that: The mounting plate is mounted between the upper mounting seat and the lower mounting seat, and the upper mounting seat and the lower mounting seat can rotate relative to the mounting plate; the top height of the mounting plate is lower than the top height of the lower mounting seat.

14. The McPherson air spring strut assembly according to claim 2, characterized in that: The spring body comprises a lower end seat connected to the damper rod assembly, and the lower end seat is arranged obliquely to the damper rod assembly.

15. The McPherson air spring strut assembly according to claim 2, characterized in that: The spring body includes an upper top seat, a bladder skin and a dust cover located outside the bladder skin. The upper top seat includes a support body and an end plate extending radially outward from the support body. A fourth seal is arranged between the support body and the lower mounting seat, and the end plate is connected to the dust cover.

16. The McPherson air spring strut assembly according to claim 2, characterized in that: It also includes an additional air chamber assembly, which is fixed to the upper part of the mounting assembly and communicates with the spring body through the mounting assembly; the mounting assembly and the spring body and the additional air chamber assembly are all sealed.

17. The McPherson air spring strut assembly according to claim 16, characterized in that: A main air chamber is formed in the spring body, and a secondary air chamber is formed in the additional air chamber assembly. The main air chamber can be communicated with the secondary air chamber.

18. The McPherson air spring strut assembly according to claim 17, characterized in that: The installation component also includes a sealing cover fixed to the additional air chamber assembly, and a gas channel is formed between the sealing cover and the additional air chamber assembly; the sealing cover and the additional air chamber assembly are fixed by snap connection or by mounting bolts.

19. The McPherson air spring strut assembly according to claim 18, characterized in that: A first sealing member and a second sealing member are arranged between the sealing cover and the additional air chamber assembly, and the first sealing member and the second sealing member are respectively located on both sides of the gas channel.

20. The McPherson air spring strut assembly according to claim 18, characterized in that: A connecting cavity connected to the spring body is formed in the sealing cover; a plurality of first vent holes are arranged on a side of the auxiliary air chamber close to the sealing cover, and a plurality of second vent holes are arranged on a side of the connecting cavity close to the additional air chamber assembly, and the second vent holes are connected to the first vent holes.

21. The McPherson air spring strut assembly according to claim 20, characterized in that: An annular transition cavity is formed between the sealing cover and the additional air chamber assembly, and the transition cavity is respectively connected to the first air vent and the second air vent; the sealing cover includes a first sealing portion and a second sealing portion extending from top to bottom, the side surface of the first sealing portion forms a first sealing surface, and the top surface of the second sealing portion forms a second step surface, and the first sealing surface, the second step surface and the additional air chamber assembly together form the transition cavity.

22. The McPherson air spring strut assembly according to claim 18, characterized in that: The sealing cover includes a third sealing portion extending into the lower mounting seat, and a third sealing member is arranged between the third sealing portion and the lower mounting seat; the bottom of the additional air chamber assembly is arranged close to the top of the upper mounting seat; the upper mounting seat is crimped on the third sealing portion; a limiting member is arranged between the lower mounting seat and the sealing cover, and the limiting member is used to limit the relative rotation between the lower mounting seat and the sealing cover.

23. The McPherson air spring strut assembly according to claim 17, characterized in that: It also includes a solenoid valve, which is arranged inside the additional air chamber assembly and is used to control the connection and disconnection of the main air chamber and the auxiliary air chamber.

24. The McPherson air spring strut assembly according to claim 1, characterized in that: The central axis of the mounting assembly coincides with the central axis of the damper rod assembly, and the central axis of the spring body is inclined to the central axis of the damper rod assembly.

25. A vehicle, characterized in that: Comprising a McPherson air spring strut assembly as described in any one of claims 1-24.

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