Lower swing arm assembly and vehicle

Abstract

The lower swing arm assembly comprises a lower swing arm, the front end of the inner side of the lower swing arm is provided with a first connecting part, the rear end of the inner side of the lower swing arm is provided with a second connecting part, the first connecting part and the second connecting part are connected with a longitudinal beam of a front auxiliary frame, and the outer side of the lower swing arm is provided with a third connecting part; the connecting support is connected to the third connecting part, and the connecting support is used for being connected with a steering knuckle; at least part, close to the third connecting part, of the outer side of the lower swing arm is configured to be a fracture area, and the fracture area is suitable for being fractured during collision and enabling the connecting support to be separated relative to the lower swing arm. According to the lower swing arm assembly, at least part of the outer side of the lower swing arm is configured to be the fracture area, so that after the vehicle is collided, the fracture area is effectively fractured, the connecting support is separated relative to the lower swing arm to be thrown outwards, the risk of passengers caused by backward movement of wheels can be prevented, and the collision performance of the vehicle is improved; and the safety of passengers in the offset collision process is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle manufacturing, and in particular to a lower swing arm assembly and a vehicle having the lower swing arm assembly. Background Art

[0002] The automobile industry is currently in an era of accelerated change. China's automobile industry in particular is developing rapidly and competition is becoming increasingly fierce. In particular, people are paying more and more attention to safety needs. Therefore, automobile safety is not only the bottom line of automobile manufacturers, but also a respect for life.

[0003] Automobile passive safety includes head-on collision, offset collision and other situations, but most users encounter more small offset collision scenarios. The existing connection form of wheels and subframes is difficult to play a key role during the collision process, especially in small offset collisions. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a lower arm assembly, in which, after a vehicle is hit, the fracture area is effectively broken, and the connecting bracket is detached from the outer side of the lower arm and thrown outward, which can prevent the wheel from moving toward the rear side of the vehicle and causing safety hazards to the occupants of the vehicle, thereby improving the collision performance of the vehicle.

[0005] According to an embodiment of the present invention, the lower swing arm assembly includes: a lower swing arm, wherein the inner front end of the lower swing arm is provided with a first connection portion and the inner rear end is provided with a second connection portion, the first connection portion and the second connection portion are respectively connected to the longitudinal beam of the front subframe, and the outer side of the lower swing arm is provided with a third connection portion; a connecting bracket, the connecting bracket is connected to the third connection portion, and the connecting bracket is used to be connected to the steering knuckle; wherein at least a portion of the outer side of the lower swing arm near the third connection portion is configured as a breaking area, and the breaking area is suitable for breaking during a collision and causing the connecting bracket to detach relative to the lower swing arm.

[0006] According to the lower control arm assembly of the embodiment of the present invention, by setting the outer side of the lower control arm to at least partially structured as a fracture area, the fracture area can be effectively broken after the vehicle is hit, and the connecting bracket can be detached from the outer side of the lower control arm and thrown out to the outside, which can prevent the wheel from moving toward the rear side of the vehicle and causing a safety hazard to the occupants in the vehicle, thereby improving the collision performance of the vehicle and improving the safety of the occupants during offset collisions.

[0007] According to the lower control arm assembly of some embodiments of the present invention, the lower control arm is also provided with a fourth connection portion, the fourth connection portion is located between the first connection portion and the third connection portion, and the fourth connection portion is used to be connected to the vibration reduction structure of the front subframe, and the fracture area is located between the third connection portion and the fourth connection portion.

[0008] According to the lower swing arm assembly of some embodiments of the present invention, the thickness of the fracture area in the Z direction is less than the thickness of the fourth connecting portion in the Z direction, and / or the thickness of the fracture area in the Z direction is less than or equal to the thickness of the third connecting portion in the Z direction;

[0009] And / or, the width of the fracture region in the X direction is less than or equal to the width of the third connection portion in the X direction, and / or the width of the fracture region in the X direction is less than or equal to the width of the fourth connection portion in the X direction.

[0010] According to the lower swing arm assembly of some embodiments of the present invention, the cross-sectional area of ​​the fracture region is configured to gradually decrease from the fourth connecting portion to the third connecting portion.

[0011] According to the lower swing arm assembly of some embodiments of the present invention, a cross-sectional area of ​​a portion of the lower swing arm located inside the fourth connecting portion is larger than a cross-sectional area of ​​a portion of the lower swing arm located outside the fourth connecting portion.

[0012] According to the lower swing arm assembly of some embodiments of the present invention, the lower swing arm is movably connected to the connecting bracket via a swing arm ball pin structure.

[0013] According to some embodiments of the present invention, the swing arm ball pin structure includes a ball socket and a ball head, wherein the ball head extends into the ball socket along the Z direction and is movably connected to the ball socket;

[0014] Wherein, one of the ball socket part and the ball head part is arranged on the connecting bracket, and the other is configured as the third connecting part.

[0015] According to the lower swing arm assembly of some embodiments of the present invention, the connecting bracket is provided with two mounting portions, the two mounting portions are spaced apart and distributed from the swing arm ball pin structure, and the two mounting portions are respectively used to be connected to the steering knuckle along the Z direction.

[0016] According to some embodiments of the present invention, the lower control arm assembly further includes a mounting bracket, which is connected to the longitudinal beam of the front subframe, and the first connecting portion is connected to the mounting bracket through a first connecting member, and the first connecting member is configured to break before the mounting bracket during a collision.

[0017] According to some embodiments of the lower control arm assembly of the present invention, the mounting bracket includes a front side plate, an intermediate connecting plate and a rear side plate, the front side plate and the rear side plate are relatively distributed and connected to the front and rear ends of the intermediate connecting plate to jointly define a mounting groove for accommodating the inner front end of the lower control arm, the first connecting member is penetrated through the front side plate and the rear side plate along the front and rear directions, and at least one of the front side plate, the intermediate connecting plate and the rear side plate is connected to the longitudinal beam of the front sub-frame through a bracket mounting member.

[0018] According to some embodiments of the present invention, the lower control arm assembly further includes a rear bracket, wherein the rear bracket is used to be connected to the longitudinal beam of the front subframe, and the second connecting portion is rotatably connected to the rear bracket.

[0019] According to the lower control arm assembly of some embodiments of the present invention, the rear bracket includes a bracket body and two connecting support plates connected to both sides of the bracket body, a sleeve cavity is formed in the bracket body, the inner rear end of the lower control arm extends into the sleeve cavity to be rotatably connected to the bracket body, and the connecting support plate is connected to the longitudinal beam of the front subframe through a second connecting member.

[0020] The present invention also provides a vehicle.

[0021] A vehicle according to an embodiment of the present invention is characterized in that it includes a lower control arm assembly according to any one of the above embodiments.

[0022] The advantages of the vehicle and the lower control arm assembly described above relative to the prior art are the same and will not be described in detail here.

[0023] 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

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0025] Figure 1 is a schematic structural diagram of a lower swing arm assembly according to an embodiment of the present invention;

[0026] Figure 2 is a rear view of a lower swing arm assembly according to an embodiment of the present invention;

[0027] Figure 3 is a top view of a lower swing arm assembly according to an embodiment of the present invention;

[0028] Figure 4 is a cross section of a lower swing arm assembly according to an embodiment of the present invention Figure 1 ;

[0029] Figure 5 is a cross section of a lower swing arm assembly according to an embodiment of the present invention Figure 2 ;

[0030] Figure 6 It is a partial exploded view of a lower control arm assembly and a longitudinal beam of a front subframe according to an embodiment of the present invention.

[0031] Reference numerals:

[0032] Lower arm assembly 100,

[0033] Mounting bracket 2, mounting groove 21, front side plate 22, middle connecting plate 23, rear side plate 24, lower swing arm 3, first connecting portion 31, second connecting portion 32, third connecting portion 33, fourth connecting portion 34, fracture area 35, connecting bracket 4, mounting portion 41, swing arm ball pin structure 5, ball socket portion 51, ball head portion 52, connecting nut 521, rear bracket 6, bracket body 61, sleeve cavity 611, connecting support plate 62, first connecting member 7, bracket mounting member 8, second connecting member 9,

[0034] Longitudinal beam 200 , mounting cavity 201 . DETAILED DESCRIPTION

[0035] 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Unless otherwise specified, the front-to-back direction in the present application is the longitudinal direction of the vehicle, that is, the X direction; the left-right direction is the lateral direction of the vehicle, that is, the Y direction; and the up-down direction is the vertical direction of the vehicle, that is, the Z direction.

[0039] Reference below Figure 1-Figure 6 The lower control arm assembly 100 according to an embodiment of the present invention is described. By setting the outer side of the lower control arm 3 to at least partially be constructed as a fracture area 35, the fracture area 35 can be effectively broken after the vehicle is hit, and the connecting bracket 4 can be detached from the outer side of the lower control arm 3 and thrown out to the outside, which can prevent the wheel from moving toward the rear side of the vehicle and causing a safety hazard to the occupants in the vehicle, thereby improving the collision performance of the vehicle and improving the safety of the occupants during an offset collision.

[0040] like Figure 1-Figure 6 As shown, a lower swing arm assembly 100 according to an embodiment of the present invention includes: a lower swing arm 3 and a connecting bracket 4.

[0041] The lower control arm 3 is located on the outside of the longitudinal beam 200 of the front subframe, and is connected to the longitudinal beam 200 of the front subframe and the wheel respectively, and is responsible for supporting weight and steering; at the same time, the lower control arm 3 is used to support the vehicle body and the shock absorbing structure, and to buffer vibrations during driving. The ingenious combination of the lower control arm 3 and the shock absorbing structure forms a complete suspension system.

[0042] A first connection portion 31 is provided at the inner front end of the lower arm 3 and a second connection portion 32 is provided at the inner rear end. The first connection portion 31 and the second connection portion 32 are respectively connected to the longitudinal beam 200 of the front subframe.

[0043] Specifically, the inner side of the lower arm 3 is connected to the longitudinal beam 200 of the front subframe. Figure 6 As shown, the inner front end of the lower arm 3 is connected to the longitudinal beam 200 of the front sub-frame through the first connecting portion 31, so that the inner front end of the lower arm 3 and the longitudinal beam 200 of the front sub-frame can be connected and fixed, that is, the force transmission between the inner front end of the lower arm 3 and the longitudinal beam 200 of the front sub-frame can be realized, and the inner rear end of the lower arm 3 is connected to the longitudinal beam 200 of the front sub-frame through the second connecting portion 32, so that the inner rear end of the lower arm 3 and the longitudinal beam 200 of the front sub-frame can be connected and fixed, that is, the lower arm 3 and the longitudinal beam 200 of the front sub-frame have two positions for connection, which can improve the connection strength between the inner structure of the lower arm 3 and the longitudinal beam 200 of the front sub-frame.

[0044] In actual design, the first connecting portion 31 and the second connecting portion 32 can be detachably connected to the connecting positions of the longitudinal beam 200 of the front subframe respectively through connecting parts such as bolts, which can ensure the connection strength between the lower arm 3 and the longitudinal beam 200 of the front subframe, and the connection method is simple and easy to disassemble and assemble.

[0045] A third connecting portion 33 is provided on the outer side of the lower swing arm 3 , and a connecting bracket 4 is connected to the third connecting portion 33 . The connecting bracket 4 is used to be connected to the steering knuckle.

[0046] Specifically, the outer side of the lower arm 3 is connected to the wheel. Figure 1-Figure 3 As shown, the outer side of the lower swing arm 3 is connected to the connecting bracket 4 through the third connecting portion 33, so that the outer side of the lower swing arm 3 and the connecting bracket 4 can be connected and fixed, and the connecting bracket 4 is connected to the steering knuckle, and the steering knuckle is connected to the wheel, that is, the connection and fixation of the connecting bracket 4 and the wheel can be achieved through the steering knuckle, so that the force transmission between the wheel and the lower swing arm 3 can be achieved.

[0047] In actual design, the third connecting portion 33 can be detachably connected to the connecting bracket 4 through connecting members such as bolts, and the connection is reliable, the connection method is simple, and it is easy to disassemble and assemble.

[0048] At least a portion of the outer side of the lower swing arm 3 close to the third connecting portion 33 is configured as a breaking area 35 , and the breaking area 35 is suitable for breaking during a collision and causing the connecting bracket 4 to detach from the lower swing arm 3 .

[0049] Specifically, at least part of the outer side of the lower arm 3 is structured as a fracture area 35, and the fracture area 35 can be arranged on the outer side of the third connecting portion 33. In this way, when the vehicle is hit, the lower arm 3 can be fractured in the fracture area 35, so that the connecting bracket 4 can be detached from the lower arm 3, and the wheel, steering knuckle and connecting bracket 4 can be thrown out relative to the lower arm 3.

[0050] When the fracture area 35 fractures, the steering knuckle and the connecting bracket 4 are directly separated from the lower arm 3 without being deformed, so that the wheel can be smoothly thrown outward. The fracture area 35 is arranged close to the third connecting portion 33, so that the outer structure of the lower arm 3 can be used for fracture, which can reduce excessive structural damage during a collision and facilitate the wheel to be thrown outward relative to the lower arm 3.

[0051] It should be noted that the collision of the vehicle includes head-on collision and offset collision, among which the head-on collision can be a collision from the front of the vehicle in the direction of travel, and the offset collision can be a collision from the left front or right front of the vehicle in the direction of travel. The fracture area 35 on the outer side of the lower arm 3 in the present invention can be fractured in the head-on collision process or in the offset collision process, and both can make the connecting bracket 4 effectively thrown outward relative to the lower arm 3, so as to prevent the wheel connected to the connecting bracket 4 from invading the passenger compartment and posing a safety hazard to the passengers. Especially in the case of an offset collision, the fracture area 35 on the outer side of the lower arm 3 is more likely to be fractured, which is conducive to improving the safety of the passengers in the offset collision process.

[0052] Therefore, when the fracture area 35 of the lower control arm assembly 100 of the embodiment of the present invention breaks, the connecting bracket 4 is separated from the outer side of the lower control arm 3 and thrown out to the outside, which can prevent the wheel from moving toward the rear side of the vehicle and posing a threat to the occupants, thereby improving the collision performance of the vehicle and reducing the injury to the occupants.

[0053] In some embodiments, the lower control arm 3 is further provided with a fourth connection portion 34, which is located between the first connection portion 31 and the third connection portion 33, and the fourth connection portion 34 is used to be connected to the vibration reduction structure of the front subframe, and the fracture area 35 is located between the third connection portion 33 and the fourth connection portion 34.

[0054] Specifically, the lower arm 3 is also provided with a shock absorbing structure of the front subframe. The lower arm 3 is connected to the shock absorbing structure of the front subframe via the fourth connecting portion 34, so that the shock absorbing structure and the lower arm assembly 100 can be connected and fixed. That is, when the vehicle is running, the lower arm 3 can move up and down with the wheel, and the force of the lower arm 3 is transmitted to the shock absorbing structure. The shock absorbing structure absorbs the impact force, thereby reducing the vibration of the vehicle body and achieving a shock absorbing effect.

[0055] like Figure 1-Figure 3 As shown, the fracture area 35 is located between the first connection part 31 and the third connection part 33. In this way, when the vehicle collides, the third connection part 33 can be separated from the first connection part 31 in the fracture area 35, and the third connection part 33 and the connecting bracket 4 can be separated relative to the first connection part 31, so that the wheel can be thrown out smoothly, and during the separation process, the structure of the connecting bracket 4 remains intact, thereby reducing excessive structural damage during the collision.

[0056] And if Figure 1-Figure 3 As shown, the fracture area 35 is located between the third connection part 33 and the fourth connection part 34, that is, when the vehicle collides, the fracture area 35 breaks, and the structure of the fourth connection part 34 remains intact. When the connecting bracket 4 is detached from the lower arm 3, the vibration reduction structure will not be deformed, thereby reducing damage to the vibration reduction structure.

[0057] Among them, the fourth connecting part 34 can be constructed as an installation groove, which penetrates along the X direction of the lower swing arm 3 and can be connected to the bracket of the vibration damping structure through connecting parts such as bolts. It has high connection strength, which can improve the force transmission characteristics between the lower swing arm 3 and the vibration damping structure, and the connection method is simple and easy to disassemble and assemble.

[0058] In some embodiments, the thickness of the fracture region 35 in the Z direction is less than the thickness of the fourth connection portion 34 in the Z direction, and / or the thickness of the fracture region 35 in the Z direction is less than or equal to the thickness of the third connection portion 33 in the Z direction.

[0059] That is to say, the thickness of the breaking region 35 in the Z direction can be set to be smaller than the thickness of one of the fourth connection part 34 and the third connection part 33 in the Z direction, or the thickness of the breaking region 35 in the Z direction can be set to be smaller than both the thickness of the fourth connection part 34 in the Z direction and the thickness of the third connection part 33 in the Z direction. The setting methods are various and can be flexibly selected according to actual needs.

[0060] Among them, the thickness of the fracture area 35 in the Z direction is set to the minimum, which is conducive to the collision of the fracture area 35 during a collision, so that the wheel is effectively thrown outward to meet the design requirements of vehicle collision, and the thickness of the fracture area 35 in the Z direction is set to the minimum, so that the third connecting part 33 and the fourth connecting part 34 are not easily deformed or broken, which can reduce damage to other structures.

[0061] Furthermore, the thickness of the fracture area 35 in the Z direction can be set to be smaller than the thickness of the fourth connection part 34 in the Z direction, and the thickness of the fracture area 35 in the Z direction can be set to be equal to the thickness of the third connection part 33 in the Z direction, and the third connection part 33 is connected to the connecting bracket 4. With this arrangement, after the vehicle is hit, the third connection part 33 and the fourth connection part 34 are not prone to fracture, and the fracture area 35 can be effectively fractured.

[0062] In other embodiments, the width of the fracture region 35 in the X direction is less than or equal to the width of the third connection portion 33 in the X direction, and / or the width of the fracture region 35 in the X direction is less than or equal to the width of the fourth connection portion 34 in the X direction.

[0063] That is to say, the width of the breaking region 35 in the X-direction can be set smaller than the width of one of the fourth connection portion 34 and the third connection portion 33 in the X-direction, and the width of the breaking region 35 in the X-direction can be set equal to the width of one of the fourth connection portion 34 and the third connection portion 33 in the X-direction, and the width of the breaking region 35 in the X-direction can be set smaller than both the width of the fourth connection portion 34 and the width of the third connection portion 33 in the X-direction, and the width of the breaking region 35 in the X-direction can be set equal to both the width of the fourth connection portion 34 and the width of the third connection portion 33 in the X-direction. The setting methods are various and can be flexibly selected according to actual needs.

[0064] Among them, the width of the fracture area 35 in the X direction is set to the minimum, which is conducive to the collision of the fracture area 35 during a collision, so that the wheel is effectively thrown outward to meet the design requirements of vehicle collision, and the width of the fracture area 35 in the X direction is set to the minimum, so that the third connecting part 33 and the fourth connecting part 34 are not easily deformed or broken, which can reduce damage to other structures.

[0065] Therefore, by setting the Z-direction thickness and X-direction width of the fracture area 35 as described above, when a vehicle collides, the collision force is transmitted along the X-direction, that is, the collision force acts on the fracture area 35 along the X-direction, which can improve the effective fracture of the fracture area 35, that is, improve the accuracy of the fracture.

[0066] In some embodiments, Figure 2As shown, the cross-sectional area of ​​the fracture region 35 is configured to gradually decrease from the fourth connection portion 34 to the third connection portion 33, wherein the fourth connection portion 34 is located on the inner side of the third connection portion 33, and the inner and outer directions are along the lateral direction of the vehicle, i.e., the Y direction, and the inner direction is the direction close to the center line of the vehicle, and the outer direction is the direction away from the center line of the vehicle, i.e., the inner end of the fracture region 35 is connected to the fourth connection portion 34, and the inner end of the fracture region 35 is provided with a large cross-sectional area, which can be smoothly connected to the fourth connection portion 34, and the large cross-sectional area of ​​the inner end can make the connection area between the fracture region 35 and the fourth connection portion 34 larger, and it is not easy to cause The fourth connection part 34 has a large cross-sectional area, which can improve the connection strength between the lower arm 3 and the vibration damping structure, and the outer end of the fracture area 35 is connected to the third connection part 33, and the outer end of the fracture area 35 is small in cross-sectional area, which can be smoothly connected to the third connection part 33, and the third connection part 33 is connected to the connecting bracket 4, which can improve the strength of the third connection part 33. In this way, when the vehicle collides, it is conducive to the fracture of the lower arm 3 in the fracture area 35 between the third connection part 33 and the fourth connection part 34, thereby improving the accuracy of the fracture.

[0067] The cross-sectional area of ​​the fracture region 35 is constructed to gradually decrease from the fourth connection portion 34 to the third connection portion 33, which can make the structural transition of the fracture region 35 smooth and the structural strength stable, thereby improving the structural stability and continuity of the lower arm 3 and facilitating processing.

[0068] Among them, Figure 5 As shown, the breaking region 35 can be configured to have a quadrilateral cross section.

[0069] In some embodiments, a cross-sectional area of ​​a portion of the lower swing arm 3 located inside the fourth connection portion 34 is greater than a cross-sectional area of ​​a portion of the lower swing arm 3 located outside the fourth connection portion 34 .

[0070] Specifically, the cross-sectional areas of the inner and outer parts of the lower swing arm 3 at the fourth connecting part 34 are set to be different, wherein the fourth connecting part 34 is located in the outer side region of the lower swing arm 3, and the cross-sectional area of ​​the part of the lower swing arm 3 located on the inner side of the fourth connecting part 34 is set to be larger, which can improve the structural strength of the inner part of the lower swing arm 3 at the fourth connecting part 34, and can improve the overall structural strength of the lower swing arm 3, and the cross-sectional area of ​​the part of the lower swing arm 3 located on the outer side of the fourth connecting part 34 is smaller, which can make the structure of the outer part of the lower swing arm 3 at the fourth connecting part 34 light, and the structural strength of the outer part is lower than the structural strength of the inner part. Such a configuration can reduce the overall weight of the lower swing arm 3 without affecting the required structural strength of the lower swing arm 3.

[0071] Furthermore, the cross-sectional area of ​​the portion of the lower arm 3 located outside the fourth connection portion 34 is smaller, which is conducive to a smooth connection with the structure of the fracture area 35, and can gradually reduce the structural strength from the fourth connection portion 34 to the third connection portion 33, forming a weaker structure, which is conducive to effective fracture in the fracture area 35 when the vehicle is hit.

[0072] In some embodiments, the lower swing arm 3 is movably connected to the connecting bracket 4 through the swing arm ball pin structure 5. Specifically, Figure 1-Figure 3 As shown, the swing arm ball pin structure 5 is connected to the outer end of the lower swing arm 3, and the swing arm ball pin structure 5 is connected to the connecting bracket 4, and the swing arm ball pin structure 5 can move relative to the connecting bracket 4, and its movement can include multi-directional movement. In this way, the swing arm ball pin structure 5 is set to withstand the force and torque from the wheel to reduce the impact between the connecting bracket 4 and the lower swing arm 3, thereby improving the riding comfort, and can reduce the wear between the two to increase the service life of the overall structure.

[0073] In some embodiments, the swing arm ball pin structure 5 includes a ball socket 51 and a ball head 52. Figure 4 As shown, the ball head portion 52 extends into the socket portion 51 along the Z direction and is movably connected to the socket portion 51, wherein the socket portion 51 is provided with a receiving cavity for receiving the ball head portion 52, and the ball head portion 52 extends into the socket portion 51 along the Z direction, and the ball head portion 52 and the socket portion 51 are relatively movable, that is, when the vehicle is running, the wheel will bounce up and down and turn, and through the relative movement between the ball head portion 52 and the socket portion 51, the suspension system can adapt to the unevenness of the road surface and the dynamic changes of the vehicle, such as acceleration, braking and turning, and can absorb the impact and vibration generated thereby, thereby improving the riding comfort and reducing the damage to other parts of the vehicle.

[0074] The connection between the ball socket 51 and the ball head 52 is a spherical fit, which can reduce friction and improve the smoothness of movement, so that the movement of the swing arm ball pin structure 5 is more stable.

[0075] Among them, one of the ball socket portion 51 and the ball head portion 52 is arranged on the connecting bracket 4, and the other is constructed as the third connecting portion 33. That is to say, the ball socket portion 51 can be arranged on the connecting bracket 4, and the third connecting portion 33 can be set as the ball head portion 52, or the ball head portion 52 can be arranged on the connecting bracket 4, and the third connecting portion 33 can be set as the ball socket portion 51. Through the above two setting methods, the movable connection between the connecting bracket 4 and the lower swing arm 3 can be realized, and the setting methods are diverse and can be flexibly selected.

[0076] like Figure 4As shown, in this embodiment, the ball head 52 is arranged on the connecting bracket 4, and the third connecting part 33 can be set as the ball socket part 51, and the ball head 52 extends in the direction close to the ball socket part 51. An external thread is provided at one end of the ball head 52 close to the connecting bracket 4, and the external thread can be matched with the connecting nut 521 to realize the detachable connection between the ball head 52 and the connecting bracket 4. The connection method is simple and easy to assemble.

[0077] In some embodiments, the connecting bracket 4 is provided with two mounting portions 41 , the two mounting portions 41 are spaced apart from the swing arm ball pin structure 5 , and the two mounting portions 41 are respectively used to be connected to the steering knuckle along the Z direction.

[0078] Specifically, the two mounting portions 41 are spaced apart from the swing arm ball pin structure 5 to avoid interference between the two mounting portions 41 and the swing arm ball pin structure 5, so as to facilitate the connection between the connecting bracket 4 and the lower swing arm 3, and the connection between the connecting bracket 4 and the steering knuckle, and to facilitate the movement of the swing arm ball pin structure 5 relative to the connecting bracket 4. The structure is reasonably arranged and easy to install.

[0079] like Figure 1 , Figure 4 and Figure 5 As shown, the connecting bracket 4 extends along the X direction, and the two mounting parts 41 are spaced apart from the swing arm ball pin structure 5 along the X direction. The two mounting parts 41 are respectively provided with connecting holes, and the connecting holes extend along the Z direction. The steering knuckle is provided with two mounting holes extending along the Z direction. The two connecting holes are distributed in a one-to-one correspondence with the two mounting holes. In this way, two bolts can be passed through the two connecting holes and the two mounting holes in a one-to-one correspondence, so that the connecting bracket 4 and the steering knuckle can be connected along the Z direction, and the connection strength is high, which is beneficial to the force transmission between the two, and the connection method is simple and easy to assemble.

[0080] In some embodiments, the lower arm assembly 100 further includes a mounting bracket 2, which is connected to the longitudinal beam 200 of the front subframe, and the first connecting portion 31 is connected to the mounting bracket 2 via a first connecting member 7, and the first connecting member 7 is configured to break before the mounting bracket 2 during a collision.

[0081] That is to say, when the vehicle is subjected to an offset collision, the collision force is first transmitted to the longitudinal beam 200 of the front subframe, and then to the mounting bracket 2. Since the first connecting member 7 is also configured to break before the mounting bracket 2 during the collision, that is, when the first connecting member 7 breaks, the mounting bracket 2 can maintain the connection with the longitudinal beam 200 of the front subframe, thereby saving parts costs. It is only necessary to break the first connecting member 7 to satisfy the requirement that the lower arm 3 drives the wheel to be thrown out toward the outside of the vehicle, so that the mounting bracket 2 maintains its original state, which facilitates the continued use of the mounting bracket 2 and avoids increasing the subsequent maintenance costs due to too many broken parts.

[0082] Specifically, refer to Figure 1 , Figure 3 and Figure 6 As shown, the longitudinal beam 200 is provided with an installation cavity 201 open to the outside, and the installation bracket 2 is installed in the installation cavity 201, which can save the space occupied by the installation bracket 2 in the longitudinal beam 200, and the strength of the longitudinal beam 200 can be increased by the installation bracket 2; in addition, a reinforcing plate is also provided in the installation cavity 201, which can further improve the strength of the longitudinal beam 200.

[0083] Among them, the first connecting member 7 can be constructed as a connecting bolt, the first connecting part 31 can be constructed as a connecting sleeve, the connecting sleeve is arranged on the connecting bolt, and the connecting bolt is connected to the mounting bracket 2 by a nut, and the connecting sleeve is rotatable relative to the connecting bolt, so the lower control arm 3 is rotatable relative to the connecting bolt, that is, when the vehicle is bumpy or the road surface is uneven during driving, the lower control arm 3 can leave a certain swing space relative to the longitudinal beam 200, thereby improving the buffering capacity of the vehicle and improving driving comfort; at the same time, when the connecting bolt breaks, it is also convenient for the lower control arm 3 to detach from the connecting bolt, so that the lower control arm 3 can quickly drive the wheel to be thrown out.

[0084] In some embodiments, the mounting bracket 2 includes a front side plate 22, an intermediate connecting plate 23 and a rear side plate 24. The front side plate 22 and the rear side plate 24 are relatively distributed and connected to the front and rear ends of the intermediate connecting plate 23 to jointly define a mounting groove 21 for accommodating the inner front end of the lower swing arm 3. The first connecting member 7 is penetrated through the front side plate 22 and the rear side plate 24 along the front and rear directions. At least one of the front side plate 22, the intermediate connecting plate 23 and the rear side plate 24 is connected to the longitudinal beam 200 of the front subframe through the bracket mounting member 8.

[0085] It should be noted that at this time, the front and rear directions of the first connecting member 7 not only include the front or rear directions. The front or rear directions can be understood as a center vertical line along the width direction of the vehicle, and the extension direction of the center vertical line is the front or rear direction. Of course, the first connecting member 7 can also have a small angle with the center vertical line, such as an angle of 1°-5°, etc., and the first connecting member 7 of the embodiment of the present invention mainly extends along the front and rear directions of the vehicle.

[0086] In practice, the front side plate 22, the middle connecting plate 23 and the rear side plate 24 form a C-shaped structure, and the opening direction of the C-shaped structure is toward the outside of the vehicle, and a mounting groove 21 is formed in the C-shaped structure, and the mounting groove 21 is open toward the outside of the vehicle. The first connecting member 7 is penetrated through the front side plate 22 and the rear side plate 24 of the mounting bracket 2 along the front-to-back direction. Then, when the first connecting portion 31 of the lower swing arm 3 is located in the mounting groove 21 and is sleeved on the first connecting member 7, since the C-shaped structure is provided with the mounting groove 21 open outward, when the lower swing arm 3 swings up and down during the driving of the vehicle, the opening of the C-shaped structure and the opening of the mounting cavity 201 of the frame longitudinal beam 200 can avoid the movement gap when the lower swing arm 3 rotates around the center line of the first connecting member 7. In addition, at least one of the front side plate 22, the middle connecting plate 23 and the rear side plate 24 is connected to the longitudinal beam 200 of the front subframe through the bracket mounting member 8, and the first connecting member 7 is connected between the front side plate 22 and the rear side plate 24. Therefore, the mounting bracket 2 is arranged in the form of the front side plate 22, the middle connecting plate 23 and the rear side plate 24, so that the breakable first connecting member 7 and the bracket mounting member 8 with a mounting function do not interfere with each other.

[0087] In addition, refer to Figure 1 and Figure 3 As shown, when the first connecting member 7 passes through the front side plate 22 and the rear side plate 24 along the front-to-back direction, the first connecting member 7 is perpendicular to the front side plate 22 and the rear side plate 24, and at least a portion of the longitudinal beam 200 is constructed as an inclined section, so that the first connecting member 7 can have an angle with the inclined section, and when the front of the vehicle is subjected to an offset collision, after the external force is transmitted to the longitudinal beam 200, the force can be decomposed into transmission along the axial direction of the first connecting member 7 and transmission along the direction perpendicular to the first connecting member 7, and the force perpendicular to the first connecting member 7 can cause the first connecting member 7 to break.

[0088] In some embodiments, the lower arm assembly 100 further includes a rear bracket 6 , which is used to be connected to the longitudinal beam 200 of the front subframe, and the second connecting portion 32 is rotatably connected to the rear bracket 6 .

[0089] Specifically, Figure 1-Figure 3 As shown, the second connection portion 32 of the lower arm 3 is connected to the longitudinal beam 200 of the front sub-frame through the rear bracket 6, so that the inner rear end of the lower arm 3 and the longitudinal beam 200 of the front sub-frame can be connected and fixed, and the force transmission between the inner rear end of the lower arm 3 and the longitudinal beam 200 of the front sub-frame can be achieved.

[0090] Among them, the second connecting part 32 can be movably connected to the rear bracket 6, that is, the movable mode of the second connecting part 32 and the rear bracket 6 can be the same as the movable mode of the first connecting part 31 and the mounting bracket 2, so that the lower control arm 3 can rotate relative to the rear bracket 6, that is, when the vehicle is bumpy or the road surface is uneven during driving, the inner front end and the inner rear end of the lower control arm 3 can leave a certain swing space relative to the longitudinal beam 200, thereby improving the buffering capacity of the vehicle and improving driving comfort; at the same time, when the connecting bolt breaks, the second connecting part 32 is connected to the rear bracket 6, so that the front end of the lower control arm 3 can quickly drive the wheel to be thrown out relative to the rear end to ensure the stability of the rear structure.

[0091] Furthermore, the second connection portion 32 can be connected to the rear bracket 6 via a bearing or other structure, so that the second connection portion 32 and the rear bracket 6 can be supported for rotation.

[0092] In some embodiments, the rear bracket 6 includes a bracket body 61 and two connecting support plates 62 connected to both sides of the bracket body 61. A sleeve cavity 611 is formed in the bracket body 61. The second connecting portion 32 of the lower arm 3 extends into the sleeve cavity 611 to be rotatably connected to the bracket body 61. The connecting support plate 62 is connected to the longitudinal beam 200 of the front subframe through a second connecting member 9.

[0093] Specifically, Figure 6 As shown, the second connecting portion 32 of the lower swing arm 3 can be configured as a connecting shaft, and the connecting shaft can extend along the front-rear direction, such as Figure 1 and Figure 2 As shown, the rear bracket 6 includes a bracket body 61, and the bracket body 61 is provided with a sleeve cavity 611, which penetrates along the front-to-back direction, and a bearing is arranged in the sleeve cavity 611. In this way, by extending the connecting shaft into the bearing of the sleeve cavity 611, the lower swing arm 3 can be rotatably connected to the rear bracket 6, which can ensure the reliable movement of the lower swing arm 3 and the rear bracket 6 and reduce the wear, vibration and noise of the connecting shaft.

[0094] And if Figure 1 and Figure 2 As shown, the rear bracket 6 includes two connecting support plates 62, and the two connecting support plates 62 and the bracket body 61 can be an integrated structure, wherein the two connecting support plates 62 are respectively provided with connecting parts, and the longitudinal beam 200 is provided with two mounting parts, the two mounting parts are distributed in a one-to-one correspondence with the two connecting parts, and the second connecting member 9 can be a bolt. In this way, the rear bracket 6 can be connected to the rear section of the longitudinal beam 200 by the two second connecting members 9 being passed through the two connecting parts and the two mounting parts in a one-to-one correspondence.

[0095] Thus, the rear bracket 6 is detachably connected to the longitudinal beam 200 of the front sub-frame through the two second connecting members 9, and the connection strength is high, and the connection method is simple and the disassembly and assembly are convenient.

[0096] The present invention also provides a vehicle.

[0097] The vehicle according to the embodiment of the present invention includes a lower arm assembly 100 of any one of the above-mentioned embodiments, wherein the outer side of the lower arm 3 is at least partially constructed as a fracture area 35, and the first connection portion 31 of the lower arm 3 is connected to the longitudinal beam 200 of the front subframe through a breakable first connection member 7, and the second connection portion 32 of the lower arm 3 is connected to the longitudinal beam 200 of the front subframe of the connecting bracket 4 through a rear bracket 6. In this way, after the vehicle is hit, the lower arm 3 is broken through the first connection member 7, and as the load continues to increase, the fracture area 35 is effectively broken, so that the connecting bracket 4 is detached from the outer side of the lower arm 3 and thrown out toward the outside, which can prevent the wheel from moving toward the rear side of the vehicle to cause a safety hazard to the occupants, thereby improving the collision performance of the vehicle and improving the safety of the occupants during an offset collision.

[0098] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0099] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A lower swing arm assembly, characterized in that: include: A lower swing arm, wherein a first connection portion is provided at an inner front end of the lower swing arm and a second connection portion is provided at an inner rear end, the first connection portion and the second connection portion are respectively connected to a longitudinal beam of a front subframe, and a third connection portion is provided at an outer side of the lower swing arm; A connecting bracket, the connecting bracket is connected to the third connecting portion, and the connecting bracket is used to be connected to the steering knuckle; Wherein, at least a portion of the outer side of the lower swing arm close to the third connecting portion is configured as a breaking area, and the breaking area is suitable for breaking during a collision and causing the connecting bracket to detach from the lower swing arm.

2. The lower swing arm assembly according to claim 1, characterized in that: The lower swing arm is also provided with a fourth connection portion, which is located between the first connection portion and the third connection portion, and the fourth connection portion is used to be connected to the vibration reduction structure of the front subframe, and the fracture area is located between the third connection portion and the fourth connection portion.

3. The lower swing arm assembly according to claim 2, characterized in that: The thickness of the fractured region in the Z direction is less than the thickness of the fourth connecting portion in the Z direction, and / or the thickness of the fractured region in the Z direction is less than or equal to the thickness of the third connecting portion in the Z direction; And / or, the width of the fracture region in the X direction is less than or equal to the width of the third connection portion in the X direction, and / or the width of the fracture region in the X direction is less than or equal to the width of the fourth connection portion in the X direction.

4. The lower swing arm assembly according to claim 2, characterized in that: A cross-sectional area of ​​the fractured region is configured to gradually decrease from the fourth connection portion toward the third connection portion.

5. The lower swing arm assembly according to claim 2, characterized in that: A cross-sectional area of ​​a portion of the lower swing arm located inside the fourth connection portion is greater than a cross-sectional area of ​​a portion of the lower swing arm located outside the fourth connection portion.

6. The swing arm assembly according to claim 1, characterized in that: The lower swing arm is movably connected to the connecting bracket via a swing arm ball pin structure.

7. The lower swing arm assembly according to claim 6, characterized in that: The swing arm ball pin structure comprises a ball socket and a ball head, wherein the ball head extends into the ball socket along the Z direction and is movably connected to the ball socket; Wherein, one of the ball socket part and the ball head part is arranged on the connecting bracket, and the other is configured as the third connecting part.

8. The lower swing arm assembly according to claim 6, characterized in that: The connecting bracket is provided with two mounting parts, the two mounting parts are spaced apart from the swing arm ball pin structure, and the two mounting parts are respectively used to be connected to the steering knuckle along the Z direction.

9. The lower swing arm assembly according to claim 1, characterized in that: It also includes a mounting bracket, which is connected to the longitudinal beam of the front subframe. The first connecting portion is connected to the mounting bracket through a first connecting member, and the first connecting member is configured to break before the mounting bracket during a collision.

10. The lower swing arm assembly according to claim 9, characterized in that: The mounting bracket includes a front side plate, an intermediate connecting plate and a rear side plate, the front side plate and the rear side plate are relatively distributed and connected to the front and rear ends of the intermediate connecting plate to jointly define a mounting groove for accommodating the inner front end of the lower swing arm, the first connecting member is penetrated through the front side plate and the rear side plate along the front and rear directions, and at least one of the front side plate, the intermediate connecting plate and the rear side plate is connected to the longitudinal beam of the front subframe through a bracket mounting member.

11. The lower swing arm assembly according to claim 1, characterized in that: It also includes a rear bracket, which is used to be connected to the longitudinal beam of the front subframe, and the second connecting part is rotatably connected to the rear bracket.

12. The lower swing arm assembly according to claim 11, characterized in that: The rear bracket includes a bracket body and two connecting support plates connected to both sides of the bracket body. A sleeve cavity is formed in the bracket body. The inner rear end of the lower swing arm extends into the sleeve cavity to be rotatably connected to the bracket body. The connecting support plate is connected to the longitudinal beam of the front subframe through a second connecting member.

13. A vehicle, characterized in that: A lower swing arm assembly comprising any one of claims 1-12.

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