Lower swing arm assembly, suspension system and vehicle

Abstract

The utility model provides a lower swing arm assembly, suspension system and vehicle relates to vehicle part technical field, lower swing arm assembly includes lower swing arm and first connecting support, lower swing arm is equipped with first connecting end, second connecting end and third connecting end that are triangularly distributed, the first connecting end is located the third connecting end towards the inside of vehicle side, and the second connecting end is located the third connecting end towards the inside of vehicle side. The first connecting end is connected to the second connecting support and located on the side, facing the front direction of the vehicle, of the second connecting end, the third connecting end is connected to a steering knuckle, the first connecting end is connected to the first connecting support through a connecting piece, and the first connecting support is connected to the front auxiliary frame longitudinal beam; the first connecting support is provided with an induced deformation structure, and when the vehicle is subjected to offset collision, the part, provided with the induced deformation structure, of the first connecting support is used for being broken under the action of concentrated stress, so that the connecting piece is separated from the first connecting support. Therefore, the falling of the front mounting point on the inner side of the lower swing arm can be realized on the basis of not weakening the mounting bolt of the lower swing arm.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field, specifically, relate to a lower swing arm assembly, suspension system and vehicle. BACKGROUND

[0002] At present, when the vehicle is designed for 25% overlap small offset collision in front, the connecting piece, i.e. bolt at the front mounting point of the steering swing arm, is usually weakened to realize the falling off of the front mounting point of the steering swing arm, so that the steering swing arm rotates along the rear mounting point after being disconnected, drives the lateral movement of the wheel, reduces the overlap area of the wheel and the vehicle body, and further reduces the deformation pressure of the vehicle body, so as to ensure that the vehicle meets the 25% overlap small offset collision test condition in front.

[0003] However, weakening the bolt will reduce the fatigue durability and strength of the mounting point of the steering swing arm, resulting in a large safety hazard of the vehicle, and quality and safety problems are likely to occur in the later real vehicle road test. UTILITY MODEL CONTENTS

[0004] The utility model solves the problem: how to realize the collision disconnection of the front end mounting point of the swing arm while ensuring the structural strength of the connecting bolt at the front end mounting point of the steering swing arm.

[0005] To solve the above problems, the utility model provides a lower swing arm assembly, suspension system and vehicle.

[0006] In the first aspect, the utility model provides a lower swing arm assembly, which comprises a lower swing arm and a first connecting support, the lower swing arm is provided with a first connecting end, a second connecting end and a third connecting end in triangular distribution, the first connecting end is located on the side of the third connecting end towards the vehicle interior and on the side of the second connecting end towards the front direction of the vehicle, the second connecting end is used for being connected to the front auxiliary frame longitudinal beam, the third connecting end is used for being connected to the steering knuckle, the first connecting end is connected to the first connecting support through a connecting piece, and the first connecting support is used for being connected to the front auxiliary frame longitudinal beam.

[0007] The first connecting support is provided with an induced deformation structure, when the vehicle is subjected to offset collision, the part of the first connecting support provided with the induced deformation structure is used for being broken under the action of concentrated stress, so that the connecting piece is disconnected from the first connecting support.

[0008] Optionally, the first connecting bracket comprises a first plate body, a second plate body and a third plate body connected in sequence and surrounding a receiving groove, the first plate body and the third plate body are arranged in positive direction along the front-rear direction of the vehicle, the slot of the receiving groove is arranged towards the outside of the vehicle, the first connecting end is located in the receiving groove, the connecting piece passes through the first plate body, the first connecting end and the third plate body in sequence, and at least one of the first plate body, the second plate body and the third plate body is provided with the induced deformation structure, and at least one of the first plate body, the second plate body and the third plate body is connected to the front subframe longitudinal beam by a fastener.

[0009] Optionally, the induced deformation structure comprises a first induced deformation surface and a second induced deformation surface arranged in positive direction, two end surfaces of the second plate body along the up-down direction of the vehicle are respectively configured as the first induced deformation surface and the second induced deformation surface, and the distance between the first induced deformation surface and the second induced deformation surface decreases in the direction from the second end to the first end of the second plate body; wherein the first end and the second end of the second plate body are opposite ends of the second plate body, the first end of the second plate body is connected to one of the first plate body and the third plate body, and the second end of the second plate body is connected to the other of the first plate body and the third plate body.

[0010] Optionally, the distance between the first induced deformation surface and the second induced deformation surface decreases in the thickness direction of the second plate body.

[0011] Optionally, the first end of the second plate body is connected to the first plate body, the second end of the second plate body is connected to the third plate body, one end of the first plate body away from the second plate body is connected to the front subframe longitudinal beam by a fastener, and one end of the third plate body connected to the second plate body is connected to the front subframe longitudinal beam by a fastener.

[0012] Optionally, the induced deformation structure further comprises a third induced deformation surface, the third induced deformation surface is arranged on the first plate body and located on the side of the connecting piece close to the second plate body, the third induced deformation surface and the first induced deformation surface are located at the same end of the first connecting bracket and intersect at the connection between the first plate body and the second plate body, and the thickness of the first plate body at the third induced deformation surface decreases in the direction from the end of the third induced deformation surface close to the connecting piece to the end away from the connecting piece;

[0013] And / or, the fourth induced deformation surface is arranged on the first plate body and located on the side of the connecting piece close to the second plate body, the fourth induced deformation surface and the second induced deformation surface are located on the same end of the first connecting support and intersect at the connecting position of the first plate body and the second plate body, and the thickness of the first plate body at the fourth induced deformation surface decreases from the end of the fourth induced deformation surface close to the connecting piece to the end of the fourth induced deformation surface away from the connecting piece.

[0014] Optionally, the second plate body is in an arched structure, and / or the first connecting support is a cast aluminum piece.

[0015] Optionally, the lower swing arm assembly further comprises a second connecting support, and the second connecting end is rotatably connected to the second connecting support through a bearing, and the second connecting support is used for being connected to the front subframe longitudinal beam.

[0016] And / or, the lower swing arm assembly further comprises a third connecting support, and the third connecting end is rotatably connected to the third connecting support through a ball pin, and the third connecting support is used for being connected to the steering knuckle.

[0017] In a second aspect, the utility model provides a kind of suspension system, comprising the lower swing arm assembly as described above.

[0018] In a third aspect, the utility model provides a kind of vehicle, comprising the lower swing arm assembly as described above or the suspension system as described above.

[0019] The beneficial effects of the lower control arm assembly of this utility model are as follows: the front mounting point (i.e., the first connecting end) of the lower control arm can be installed onto the first connecting bracket via a connector, and the first connecting bracket is connected to the front subframe longitudinal beam to achieve the installation and fixation of the front mounting point of the lower control arm. Simultaneously, by connecting the rear mounting point (i.e., the second connecting end) of the lower control arm to the front subframe longitudinal beam and the outer mounting point (i.e., the third connecting end) of the lower control arm to the steering knuckle, the rear mounting point and the outer mounting point of the lower control arm are installed and fixed, thereby achieving the installation and fixation of the lower control arm assembly. Furthermore, by providing an induced deformation structure on the first connecting bracket, the first connecting bracket can fracture at the induced deformation structure under concentrated stress. Thus, when the vehicle experiences an offset collision, the lower control arm, due to the rearward impact force at the third connecting end, tends to swing outwards, causing the first connecting end of the lower control arm to be subjected to a load towards the outwards of the vehicle. This load is transmitted through the connecting... The stress is transferred to the first connecting bracket, causing stress concentration at the induced deformation structure. Under the action of concentrated stress, the first connecting bracket fractures. After fracture, the strength of the first connecting bracket is significantly weakened, allowing the connecting component to tear open the part of the first connecting bracket used for the connecting component to pass through under the load facing outwards of the vehicle. This allows the connecting component to be pulled out of the first connecting bracket and into a free state, causing the first connecting end of the lower control arm to detach from the first connecting bracket. Consequently, the lower control arm can rotate around the second connecting end to drive the wheel to move laterally, reducing the collision overlap area between the wheel and the vehicle body. This not only prevents the wheel from intruding into the passenger compartment and posing a safety hazard to the occupants, but also effectively alleviates the collision pressure on the vehicle body structure, providing a larger survival space for the occupants. At the same time, it can also effectively improve the collision performance of the front 25% overlap small offset collision test and the integrity of the vehicle body structure in the front 25% overlap small offset collision test. Furthermore, compared to related technologies that use weakened connecting parts (i.e., connecting bolts) to achieve the detachment of the lower control arm's front mounting point, this invention provides an induced deformation structure on the first connecting bracket connected to the lower control arm's front mounting point. This allows the first connecting bracket to fracture at the induced deformation structure under concentrated stress. This not only makes the detachment deformation of the lower control arm's front mounting point easier to control, but also achieves collision detachment of the lower control arm's front mounting point without weakening the mounting bolts. This ensures that connecting parts such as bolts at the lower control arm's front mounting point have high structural strength and fatigue durability, avoiding significant safety hazards caused by wear and fatigue of the connecting parts. Additionally, since the first connecting end of the lower control arm is not directly connected to the first connecting bracket, the up-and-down swing of the lower control arm during normal vehicle operation has minimal impact on the fatigue durability of the first connecting bracket. Consequently, the first connecting bracket with the induced deformation structure also has high fatigue durability, avoiding significant safety hazards caused by wear and fatigue of the first connecting bracket. Attached Figure Description

[0020] Figure 1 It is the structural schematic view of lower swing arm assembly in the embodiment of the utility model;

[0021] Figure 2 It is the explosion structural schematic view of lower swing arm assembly in the embodiment of the utility model;

[0022] Figure 3 It is the assembly structural schematic view of lower swing arm assembly and front subframe in the embodiment of the utility model;

[0023] Figure 4 It is the structural schematic view of lower swing arm assembly when being installed on front subframe longitudinal beam in the embodiment of the utility model;

[0024] Figure 5 It is the structural schematic view of first connecting support with connecting piece in the embodiment of the utility model;

[0025] Figure 6 It is the structural schematic view of first connecting support with connecting piece in the embodiment of the utility model from another perspective;

[0026] Figure 7 It is the structural schematic view of first connecting support with connecting piece in the embodiment of the utility model from still another perspective.

[0027] Explanation of reference signs:

[0028] 1, lower swing arm; 11, first connecting end; 12, second connecting end; 13, third connecting end; 2, first connecting support; 21, first plate body; 22, second plate body; 23, third plate body; 24, induced deformation structure; 241, first induced deformation surface; 242, second induced deformation surface; 243, third induced deformation surface; 244, fourth induced deformation surface; 25, accommodating groove; 3, second connecting support; 4, third connecting support; 5, connecting piece; 6, bearing; 7, ball head pin; 800, front subframe longitudinal beam; 810, open mouth. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model are described in detail below with reference to the drawings. Although some embodiments of the utility model are shown in the drawings, it should be understood that the utility model can be realized in various forms, and should not be interpreted as being limited to the embodiments described herein, on the contrary, these embodiments are provided to more thoroughly and completely understand the utility model. It should be understood that the drawings and embodiments of the utility model are only for exemplary purposes, and are not used to limit the protection scope of the utility model.

[0030] The Z-axis in the drawings represents a vertical direction, that is, an up-down position, and a positive direction of the Z-axis represents an upward direction, and a negative direction of the Z-axis represents a downward direction; the X-axis in the drawings represents a horizontal direction and is designated as a front-rear position, and a positive direction of the X-axis represents a front side, and a negative direction of the X-axis represents a rear side; and the Y-axis in the drawings represents a left-right position, and a positive direction of the Y-axis represents a left side, and a negative direction of the Y-axis represents a right side. It should be noted that the meanings of the aforementioned Z-axis, Y-axis and X-axis are only for the convenience of describing the utility model and simplifying the description, and are not indicative or suggestive of the devices or elements indicated having a specific orientation, being constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model.

[0031] The term "comprising" and variations thereof as used herein are open-ended, that is "including, but not limited to"; the term "based on" is, at least based on part on; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". Related definitions of other terms will be given in the description below. It should be noted that the "first", "second", and the like concepts mentioned in the utility model are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0032] It should be noted that the modification of "one" or "multiple" mentioned in the utility model is illustrative and not limiting, and those skilled in the art should understand that, unless otherwise explicitly indicated in the context, it should be understood as "one or more".

[0033] In the related art, when designing a 25% overlap small offset collision of a vehicle, a bolt body at a front installation point of a steering swing arm is usually weakened to realize the falling off of the front installation point of the steering swing arm, so that the steering swing arm rotates along a rear installation point after being disconnected, drives the lateral movement of a wheel, reduces the overlap area of the wheel and the vehicle body, and further reduces the deformation pressure of the vehicle body, so as to ensure that the vehicle meets the 25% overlap small offset collision test condition. However, weakening the bolt body reduces the fatigue durability and strength of the installation point of the steering swing arm, which causes a large safety hazard of the vehicle and easily causes quality and even safety problems in the later real vehicle road test.

[0034] In view of the problems in the above related art, the utility model provides a lower swing arm assembly, a suspension system and a vehicle.

[0035] In combination with Figure 1 , Figure 3 and Figure 4As shown, the lower swing arm assembly provided by the embodiment of the utility model comprises a lower swing arm 1 and a first connecting support 2, the lower swing arm 1 is provided with a first connecting end 11, a second connecting end 12 and a third connecting end 13 in triangular distribution, the first connecting end 11 is located on the side of the third connecting end 13 towards the vehicle interior and on the side of the second connecting end 12 towards the front direction of the vehicle, the second connecting end 12 is used to be connected to the front subframe longitudinal beam 800, and the third connecting end 13 is used to be connected to the steering knuckle, the first connecting end 11 is connected to the first connecting support 2 through a connecting piece 5, and the first connecting support 2 is used to be connected to the front subframe longitudinal beam 800.

[0036] The first connecting support 2 is provided with an induced deformation structure 24, when the vehicle is subjected to offset collision, the part of the first connecting support 2 provided with the induced deformation structure 24 is used to be fractured under the action of concentrated stress, so that the connecting piece 5 is separated from the first connecting support 2.

[0037] It should be noted that, as shown, Figure 3 The lower swing arm assembly is arranged on the left and right sides of the vehicle, that is to say, one lower swing arm assembly is arranged on each of the left and right sides of the vehicle, the lower swing arm assembly arranged on the left side of the vehicle is connected to the steering knuckle of the left wheel and the left longitudinal beam of the front subframe, and the lower swing arm assembly arranged on the right side of the vehicle is connected to the steering knuckle of the right wheel and the right longitudinal beam of the front subframe.

[0038] It should be further noted that, the front-rear direction of the vehicle is the X-axis direction, referred to as the front-rear direction or the longitudinal direction, and is also the driving direction of the vehicle, and the positive direction of the X-axis is the front direction of the vehicle, and correspondingly, the left-right direction of the vehicle is the Y-axis direction, referred to as the left-right direction or the transverse direction, and the up-down direction of the vehicle is the Z-axis direction, referred to as the up-down direction. Figure 3 Figure 3 Figure 3 In addition, for example, the inner side of the member such as the lower swing arm 1 refers to the side of the member towards the vehicle interior along the transverse direction, and correspondingly, the outer side of the member such as the lower swing arm 1 refers to the side of the member towards the vehicle exterior along the transverse direction.

[0039] ​​Specifically, the lower swing arm 1 is a component in a vehicle suspension system, which is used to realize steering and support the weight of components such as a vehicle body and a damping assembly in the suspension system, and also used to buffer the vibration in driving. When assembled, the lower swing arm 1 is mounted on the outer side of the front subframe longitudinal beam 800, and connected with the front subframe longitudinal beam 800 and the steering knuckle mounted on the wheel. The lower swing arm 1 has three end portions which are approximately in the shape of a right triangle, namely a first connecting end 11, a second connecting end 12 and a third connecting end 13. The first connecting end 11 is located at the right angle of the right triangle, and the first connecting end 11 is located in front of the second connecting end 12 and inside the third connecting end 13. For example, for the lower swing arm 1 on the left side of the vehicle, the first connecting end 11 is located on the right side of the third connecting end 13, and for the lower swing arm 1 on the right side of the vehicle, the first connecting end 11 is located on the left side of the third connecting end 13. That is, the first connecting end 11 is the front inner mounting point of the lower swing arm 1, the second connecting end 12 is the rear inner mounting point of the lower swing arm 1, and the third connecting end 13 is the outer mounting point of the lower swing arm 1. Moreover, the first connecting end 11 is connected with the front subframe longitudinal beam 800 through a first connecting bracket 2, the second connecting end 12 is connected with the front subframe longitudinal beam 800, and the third connecting end 13 is connected with the steering knuckle. The first connecting bracket 2 and the front subframe longitudinal beam 800 can be detachably connected by means of, for example, bolt connection, and the first connecting end 11 and the first connecting bracket 2 are connected through a connecting piece 5, which can be a bolt or a pin shaft. For example, Figure 1 The connecting piece 5 is a bolt, which is arranged in the front-rear direction, and the first connecting end 11 can be a bushing structure, which is sleeved on the bolt when assembled, and the bolt is locked with the first connecting bracket 2 through a nut. In addition, the first connecting end 11 can rotate relative to the connecting piece 5, and when the vehicle bounces due to uneven road surface, the lower swing arm 1 can swing slightly relative to the front subframe longitudinal beam 800 to realize the buffering effect.

[0040] More specifically, the first connecting bracket 2 is provided with an induced deformation structure 24, so that the first connecting bracket 2 can concentrate stress at the induced deformation structure 24 and break. For example, when the vehicle is subjected to a side impact, the front wheel is subjected to a rearward impact force, which is transmitted to the third connecting end 13 of the lower control arm 1 through the steering knuckle, so that the third connecting end 13 is also subjected to a rearward impact force, which makes the lower control arm 1 tend to swing outward, so that the first connecting end 11 of the lower control arm 1 is subjected to a load toward the outside of the vehicle, which is transmitted to the first connecting bracket 2 through the connecting piece 5, so that the first connecting bracket 2 is also subjected to a load toward the outside of the vehicle. Since the first connecting bracket 2 is provided with the induced deformation structure 24, when the first connecting bracket 2 is subjected to a load toward the outside of the vehicle, stress is concentrated at the induced deformation structure 24, so that the first connecting bracket 2 breaks under the action of the concentrated stress. After the first connecting bracket 2 breaks, its strength is significantly weakened, so that the connecting piece 5 can tear the part of the first connecting bracket 2 for the connecting piece 5 to pass through under the action of the load toward the outside of the vehicle, and then the connecting piece 5 is pulled out of the first connecting bracket 2 to become free, i.e., the connecting piece 5 is separated from the first connecting bracket 2, so that the first connecting end 11 of the lower control arm 1 is separated from the first connecting bracket 2, and then the lower control arm 1 rotates around the second connecting end 12 to drive the wheel to move transversely (i.e., left and right), reducing the collision overlap area between the wheel and the vehicle body, and avoiding the wheel from invading the passenger compartment to form a safety hazard to the passengers.

[0041] In the embodiment, the inner front mounting point (i.e., the first connecting end 11) of the lower swing arm 1 can be mounted to the first connecting bracket 2 through the connecting piece 5, and the first connecting bracket 2 is connected to the front subframe longitudinal beam 800, so as to realize the mounting and fixing of the front mounting point of the lower swing arm 1. Meanwhile, the inner rear mounting point (i.e., the second connecting end 12) of the lower swing arm 1 is connected to the front subframe longitudinal beam 800, and the outer mounting point (i.e., the third connecting end 13) of the lower swing arm 1 is connected to the steering knuckle, so as to realize the mounting and fixing of the rear mounting point and the outer mounting point of the lower swing arm 1, and further realize the mounting and fixing of the lower swing arm assembly. Meanwhile, the induced deformation structure 24 is arranged on the first connecting bracket 2, so that the first connecting bracket 2 can be broken at the induced deformation structure 24 under the action of stress concentration. When the vehicle is subjected to offset collision, the lower swing arm 1 tends to swing outwardly due to the rear impact force at the third connecting end 13, so that the first connecting end 11 of the lower swing arm 1 is subjected to the load towards the outside of the vehicle. The load is transmitted to the first connecting bracket 2 through the connecting piece 5, so that the first connecting bracket 2 is subjected to stress concentration at the induced deformation structure 24 and is broken under the action of stress concentration. After the first connecting bracket 2 is broken, the strength is significantly weakened, so that the connecting piece 5 can tear the part of the first connecting bracket 2 for the connecting piece 5 to pass through under the action of the load towards the outside of the vehicle, so that the connecting piece 5 can be pulled out of the first connecting bracket 2 to be in a free state, so that the first connecting end 11 of the lower swing arm 1 is separated from the first connecting bracket 2, and further so that the lower swing arm 1 can rotate around the second connecting end 12 to drive the wheel to move transversely, so as to reduce the overlap area of the wheel and the vehicle body. Not only can the wheel invasion into the passenger compartment be avoided to form a safety hazard to the passengers, but also the collision pressure of the vehicle body structure can be effectively relieved, a larger survival space for the passengers in the vehicle can be provided, and the crash performance of the front 25% overlap small offset collision test and the integrity of the vehicle body structure in the front 25% overlap small offset collision test can be effectively improved. Moreover, compared with the related art in which a weakened connecting piece (i.e., a connecting bolt) is used to realize the falling of the front mounting point of the lower swing arm 1, the induced deformation structure 24 is arranged on the first connecting bracket 2 connected to the inner front mounting point of the lower swing arm 1, so that the first connecting bracket 2 can be broken at the induced deformation structure 24 under the action of stress concentration. Not only can the falling of the inner front mounting point of the lower swing arm 1 be more easily controlled, but also the collision falling of the inner front mounting point of the lower swing arm 1 can be realized without weakening the mounting bolt, so as to ensure that the connecting piece such as a bolt at the inner front mounting point of the lower swing arm 1 has high structural strength and fatigue durability, and avoid that the vehicle has a large safety hazard due to the loss of fatigue of the connecting piece.In addition, since the first connecting end 11 of the lower swing arm 1 is not directly connected with the first connecting support 2, the up-and-down swinging of the lower swing arm 1 during normal driving of the vehicle has little effect on the fatigue durability of the first connecting support 2, and thus the first connecting support 2 provided with the induced deformation structure 24 also has high fatigue durability, avoiding the safety hazard of the vehicle due to the wear and fatigue of the first connecting support 2.

[0042] Further, in combination with Figure 3 , as shown in the figure, the front subframe longitudinal beam 800 is a hollow beam structure, and the outer side of the front subframe longitudinal beam 800 is provided with an opening 810, and the first connecting support 2 is installed in the cavity of the front subframe longitudinal beam 800 from the opening 810. In this way, the first connecting end 11 of the lower swing arm 1 is installed inside the front subframe longitudinal beam 800, thereby reducing the occupied space of the first connecting end 11 of the lower swing arm 1, and at the same time, the first connecting support 2 can be used to enhance the structural strength of the front subframe longitudinal beam 800.

[0043] Optionally, the first connecting support 2 is an aluminum casting. In this way, on the one hand, the first connecting support 2 can be produced and manufactured in an integrated manner, improving production efficiency, and on the other hand, the first connecting support 2 has certain structural strength and can quickly break and deform at the induced deformation structure 24 when subjected to lateral load, and at the same time, the connecting piece 5 can be pulled off from the broken area of the first connecting support 2 to become free when the first connecting support 2 breaks, so as to realize the quick falling of the inner front mounting point of the lower swing arm 1 and improve the front offset crash performance of the vehicle.

[0044] Optionally, in combination with Figure 1 , Figure 2 and Figure 4As shown in the figures, the lower swing arm assembly further comprises a second connecting bracket 3, and the second connecting end 12 is rotatably connected to the second connecting bracket 3 through a bearing 6. The second connecting bracket 3 is used to be connected to the front subframe longitudinal beam 800. The second connecting bracket 3 can be detachably connected to the front subframe longitudinal beam 800 by means of bolts or the like. In this way, the second connecting end 12 of the lower swing arm 1 is connected to the front subframe longitudinal beam 800 through the second connecting bracket 3, so as to realize the connection and fixation of the inner rear end of the lower swing arm 1 to the front subframe longitudinal beam 800. At the same time, the second connecting end 12 is rotatably connected to the second connecting bracket 3 through the bearing 6, so that the second connecting end 12 of the lower swing arm 1 can rotate relative to the second connecting bracket 3. The rotation axes of the second connecting end 12 and the first connecting end 11 are substantially in the same direction, i.e. in the front-rear direction. Therefore, when the vehicle bounces due to uneven road surface, the inner front end and the inner rear end of the lower swing arm 1 can both swing slightly relative to the front subframe longitudinal beam 800, thereby improving the buffering capacity of the vehicle and the comfort of driving and riding. Moreover, when the first connecting bracket 2 breaks, the second connecting end 12 is still connected to the second connecting bracket 3, so that the front end of the lower swing arm 1 can quickly drive the wheel to move transversely relative to the rear end, so as to reduce the collision pressure of the vehicle body structure and improve the integrity of the vehicle body structure.

[0045] Optionally, as shown in the figures Figure 1 , Figure 2 and Figure 4 , the lower swing arm assembly further comprises a third connecting bracket 4, and the third connecting end 13 is rotatably connected to the third connecting bracket 4 through a ball pin 7. The third connecting bracket 4 is used to be connected to the steering knuckle. The third connecting bracket 4 can be detachably connected to the steering knuckle by means of bolts or the like. In this way, the third connecting end 13 of the lower swing arm 1 is connected to the steering knuckle through the third connecting bracket 4, so as to realize the connection and fixation of the outer side of the lower swing arm 1 to the steering knuckle. At the same time, the third connecting end 13 is rotatably connected to the third connecting bracket 4 through the ball pin 7, so that the third connecting end 13 of the lower swing arm 1 can move in multiple directions relative to the third connecting bracket 4. This facilitates the outer side of the lower swing arm 1 to bear the force and torque from the wheel, so as to reduce the impact and wear between the third connecting bracket 4 and the lower swing arm 1, thereby improving the comfort of riding and the service life of the lower swing arm assembly.

[0046] Optionally, as shown in the figures Figure 1 , Figure 2 and Figure 5As shown, the first connecting bracket 2 comprises a first plate body 21, a second plate body 22 and a third plate body 23 connected in sequence and surrounding a receiving groove 25, the first plate body 21 and the third plate body 23 are arranged in alignment along the front-rear direction of the vehicle, the opening of the receiving groove 25 is arranged towards the outside of the vehicle, the first connecting end 11 is located in the receiving groove 25, the connecting piece 5 passes through the first plate body 21, the first connecting end 11 and the third plate body 23 in sequence, and at least one of the first plate body 21, the second plate body 22 and the third plate body 23 is provided with an induced deformation structure 24, and at least one of the first plate body 21, the second plate body 22 and the third plate body 23 is used for being connected to the front subframe longitudinal beam 800 by a fastener.

[0047] In the alternative embodiment, the first connecting bracket 2 is mainly composed of three parts, namely the first plate body 21, the second plate body 22 and the third plate body 23, wherein at least one of the first plate body 21, the second plate body 22 and the third plate body 23 is provided with an induced deformation structure 24, and the first plate body 21, the second plate body 22 and the third plate body 23 can be connected into a C-shaped or U-shaped structure, that is, the first connecting bracket 2 is approximately C-shaped or U-shaped, and the space surrounded by the C-shaped or U-shaped structure constitutes the receiving groove 25, and the opening of the C-shaped or U-shaped structure is towards the outside of the vehicle, that is, the opening of the receiving groove 25 is towards the outside of the vehicle. At the same time, the first plate body 21 and the third plate body 23 surrounding the receiving groove 25 are arranged in alignment along the front-rear direction, the first connecting end 11 of the lower swing arm 1 is located in the receiving groove 25, and the connecting piece 5 is arranged in the first plate body 21, the first connecting end 11 and the third plate body 23 along the front-rear direction or approximately along the front-rear direction. In this way, when the lower swing arm 1 swings up and down during the driving of the vehicle, the opening of the receiving groove 25 surrounded by the first plate body 21, the second plate body 22 and the third plate body 23 and the opening 810 of the front subframe longitudinal beam 800 can avoid the lower swing arm 1, so that the lower swing arm 1 can rotate around the center line of the connecting piece 5, preventing the first connecting end 11 of the lower swing arm 1 from interfering with the first connecting bracket 2. In addition, at least one of the first plate body 21, the second plate body 22 and the third plate body 23 is connected to the front subframe longitudinal beam 800 by means of, for example, bolt connection, to realize the connection and fixation between the first connecting bracket 2 and the front subframe longitudinal beam 800.

[0048] Optionally, in combination with Figure 6 and Figure 7 As shown, the second plate body 22 is in an arched structure. In this way, on the one hand, the gap between the second plate body 22 and the first connecting end 11 can be increased to avoid interference between them, and on the other hand, compared with the flat plate structure of the second plate body 22 perpendicular to the first plate body 21, the arched structure of the second plate body 22 can more easily concentrate the load on the induced deformation structure 24, so as to ensure that the first connecting bracket 2 can be broken and deformed when the vehicle is subjected to offset collision, thereby realizing the collision shedding of the inner front mounting point of the lower swing arm 1.

[0049] Optionally, in combination with Figure 1 and Figure 5 As shown in FIG. 8, the induced deformation structure 24 includes a first induced deformation surface 241 and a second induced deformation surface 242 arranged in opposition, and the two end surfaces of the second plate body 22 in the up-down direction of the vehicle are respectively configured as the first induced deformation surface 241 and the second induced deformation surface 242, and the spacing between the first induced deformation surface 241 and the second induced deformation surface 242 decreases in the direction from the second end to the first end of the second plate body 22. The first end and the second end of the second plate body 22 are opposite ends of the second plate body 22, and the first end of the second plate body 22 is connected to one of the first plate body 21 and the third plate body 23, and the second end of the second plate body 22 is connected to the other of the first plate body 21 and the third plate body 23.

[0050] In this optional embodiment, the first induced deformation surface 241 and the second induced deformation surface 242 can be respectively the end surfaces of the upper and lower ends of the second plate body 22, and can be arranged in symmetry, and the first end and the second end of the second plate body 22 are opposite ends of the second plate body 22 in the length direction thereof. The first end of the second plate body 22 can be connected to the first plate body 21, and the second end of the second plate body 22 can be connected to the third plate body 23, and in this case, the spacing between the first induced deformation surface 241 and the second induced deformation surface 242 decreases in the direction from the end of the second plate body 22 connected to the third plate body 23 to the end of the second plate body 22 connected to the first plate body 21. Alternatively, the first end of the second plate body 22 can be connected to the third plate body 23, and the second end of the second plate body 22 can be connected to the first plate body 21, and in this case, the spacing between the first induced deformation surface 241 and the second induced deformation surface 242 decreases in the direction from the end of the second plate body 22 connected to the first plate body 21 to the end of the second plate body 22 connected to the third plate body 23. That is, the dimension of the second plate body 22 in the Z-axis direction (i.e., the width of the second plate body 22) decreases in the direction from the second end to the first end of the second plate body 22. In this way, not only is the first connecting bracket 2 provided with high strength to ensure that the first connecting end 11 of the swing arm 1 is firmly connected to the front subframe side member 800, but also the first connecting bracket 2 is prone to breakage and deformation at the minimum width of the second plate body 22, so as to realize the collision shedding of the inner front mounting point of the swing arm 1.

[0051] Optionally, in combination with Figure 5 As shown in FIG. 8, in the thickness direction of the second plate body 22, the spacing between the first induced deformation surface 241 and the second induced deformation surface 242 decreases.

[0052] In the alternative embodiment, since the thickness of the second plate body 22 refers to the dimension of the second plate body 22 in the direction perpendicular to the inner side or the outer side of the second plate body 22, the thickness direction of the second plate body 22 is the direction perpendicular to the inner side or the outer side of the second plate body 22. When the interval between the first induced deformation surface 241 and the second induced deformation surface 242 decreases in the direction from the outer side of the second plate body 22 to the inner side, as shown in Figure 4

[0053] Thus, on the basis that the width of the second plate body 22 decreases in the direction from the second end to the first end of the second plate body 22, by setting the interval between the first induced deformation surface 241 and the second induced deformation surface 242 in the thickness direction of the second plate body 22 to decrease, the thickness of the second plate body 22 at the first induced deformation surface 241 and the second induced deformation surface 242 is also designed to decrease, so that the first connecting bracket 2 starts to break and deform at the position where the thickness and the width of the second plate body 22 are both smallest.

[0054] Alternatively, as shown in Figure 6

[0055] ​​In the alternative embodiment, one end of the first plate body 21 is detachably connected to the front subframe longitudinal beam 800 by a first fastener, and one end of the third plate body 23 is detachably connected to the front subframe longitudinal beam 800 by a second fastener. The first fastener and the second fastener are respectively located on the left and right sides of the connecting member 5. That is, the connecting member 5 applies a downward force to the first connecting bracket 2, and the first fastener and the second fastener respectively provide upward supporting forces to the first connecting bracket 2 on the left and right sides of the connecting member 5. In this way, the first connecting bracket 2 is more balanced and uniform in stress, and the fatigue durability of the first connecting bracket 2 can be improved. Moreover, the distance between the first induced deformation surface 241 and the second induced deformation surface 242 decreases from the end of the second plate body 22 connected to the third plate body 23 to the end of the second plate body 22 connected to the first plate body 21, that is, the width of the second plate body 22 decreases from the end of the second plate body 22 connected to the third plate body 23 to the end of the second plate body 22 connected to the first plate body 21. That is, the part of the second plate body 22 with the smallest width is far away from the first fastener and the second fastener. In this way, the breaking part of the first connecting bracket 2 can be away from the fastener that connects the first connecting bracket 2 and the front subframe longitudinal beam 800, thereby reducing damage to other structures.

[0056] Optionally, in combination with Figure 6 As shown, the induced deformation structure 24 further includes a third induced deformation surface 243, which is arranged on the first plate body 21 and located on the side of the connecting member 5 close to the second plate body 22. The third induced deformation surface 243 and the first induced deformation surface 241 are located on the same end of the first connecting bracket 2 and intersect at the connection between the first plate body 21 and the second plate body 22. The thickness of the first plate body 21 at the third induced deformation surface 243 decreases from the end of the third induced deformation surface 243 close to the connecting member 5 to the end of the third induced deformation surface 243 away from the connecting member 5.

[0057] It should be noted that the upper end of the first plate body 21, the second plate body 22 and the third plate body 23 is also the upper end of the first connecting bracket 2, and correspondingly, the lower end of the first plate body 21, the second plate body 22 and the third plate body 23 is also the lower end of the first connecting bracket 2. Therefore, when the first induced deformation surface 241 is arranged at the upper end of the second plate body 22, it is equivalent to that the first induced deformation surface 241 is arranged at the upper end of the first connecting bracket 2. Similarly, when the first induced deformation surface 241 is arranged at the lower end of the second plate body 22, it is equivalent to that the first induced deformation surface 241 is arranged at the lower end of the first connecting bracket 2.

[0058] In the alternative embodiment, the distance between the first induced deformation surface 241 and the second induced deformation surface 242 decreases from the end where the second plate body 22 is connected to the third plate body 23 to the end where the second plate body 22 is connected to the first plate body 21, i.e. the width of the second plate body 22 decreases from the end where the second plate body 22 is connected to the third plate body 23 to the end where the second plate body 22 is connected to the first plate body 21. Taking the case where the first induced deformation surface 241 is arranged at the upper end of the second plate body 22 as an example, the third induced deformation surface 243 is arranged at the upper end of the first plate body 21 and located at the side of the connector 5 close to the second plate body 22 (also the side of the connector 5 facing the vehicle interior), and the third induced deformation surface 243 intersects with the first induced deformation surface 241 at the connection between the first plate body 21 and the second plate body 22, and the thickness of the first plate body 21 at the third induced deformation surface 243 decreases from the end of the third induced deformation surface 243 close to the connector 5 to the end of the third induced deformation surface 243 away from the connector 5. In this way, on the basis of the width of the second plate body 22 decreasing from the end where the second plate body 22 is connected to the third plate body 23 to the end where the second plate body 22 is connected to the first plate body 21, the thickness of the first plate body 21 at the third induced deformation surface 243 is further arranged to decrease from the end of the third induced deformation surface 243 close to the connector 5 to the end of the third induced deformation surface 243 away from the connector 5, so that the width and the thickness of the connection between the first plate body 21 and the second plate body 22 are both small, facilitating the fracture deformation of the first connecting bracket 2 at the connection between the first plate body 21 and the second plate body 22.

[0059] Optionally, in combination with Figure 7 As shown in the figure, the induced deformation structure 24 further comprises a fourth induced deformation surface 244, the fourth induced deformation surface 244 is arranged on the first plate body 21 and located at the side of the connector 5 close to the second plate body 22, the fourth induced deformation surface 244 and the second induced deformation surface 242 are located at the same end of the first connecting bracket 2 and intersect at the connection between the first plate body 21 and the second plate body 22, and the thickness of the first plate body 21 at the fourth induced deformation surface 244 decreases from the end of the fourth induced deformation surface 244 close to the connector 5 to the end of the fourth induced deformation surface 244 away from the connector 5.

[0060] In the alternative embodiment, the fourth induced deformation surface 244 is arranged at the lower end of the first plate body 21 and is located at the side of the connecting member 5 close to the second plate body 22 (also the side of the connecting member 5 facing the vehicle interior), and the fourth induced deformation surface 244 intersects with the second induced deformation surface 242 at the connecting position of the first plate body 21 and the second plate body 22, and the thickness of the first plate body 21 at the fourth induced deformation surface 244 decreases from the end of the fourth induced deformation surface 244 close to the connecting member 5 to the end of the fourth induced deformation surface 244 away from the connecting member 5. In this way, on the basis of the decreasing width of the second plate body 22 from the end of the second plate body 22 connected to the third plate body 23 to the end of the second plate body 22 connected to the first plate body 21, the thickness of the first plate body 21 at the fourth induced deformation surface 244 is further arranged to decrease from the end of the fourth induced deformation surface 244 close to the connecting member 5 to the end of the fourth induced deformation surface 244 away from the connecting member 5, so that the width and the thickness of the connecting position of the first plate body 21 and the second plate body 22 are both small, facilitating the fracture deformation of the first connecting bracket 2 at the connecting position of the first plate body 21 and the second plate body 22.

[0061] The suspension system provided by the embodiment of the present application comprises the lower swing arm assembly as described above.

[0062] The suspension system provided by the embodiment of the present application has the same advantages as the lower swing arm assembly described above, and will not be described herein.

[0063] The vehicle provided by the embodiment of the present application comprises the lower swing arm assembly as described above or the suspension system as described above.

[0064] In the embodiment, the vehicle further comprises a front subframe longitudinal beam 800 and a steering knuckle, the steering knuckle is arranged on the vehicle wheel and is used to drive the vehicle wheel to steer, the lower swing arm assembly is located outside the front subframe longitudinal beam 800, the first connecting end 11 of the lower swing arm 1 is detachably connected to the front subframe longitudinal beam 800 through the first connecting bracket 2, the second connecting end 12 of the lower swing arm 1 is detachably connected to the front subframe longitudinal beam 800 through the second connecting bracket 3, and the third connecting end 13 of the lower swing arm 1 is detachably connected to the steering knuckle through the third connecting bracket 4. In addition, the vehicle provided by the embodiment has the same advantages as the lower swing arm assembly described above, and will not be described herein.

[0065] Although the present application is disclosed as above, the protection scope of the present application is not limited to this. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, and these changes and modifications will all fall within the protection scope of the present application.

Claims

1. A drop arm assembly, characterized by, The application relates to a front subframe connecting structure of a vehicle, which comprises a lower swing arm (1) and a first connecting support (2), wherein the lower swing arm (1) is provided with a first connecting end (11), a second connecting end (12) and a third connecting end (13) arranged in a triangular shape, the first connecting end (11) is located on the side of the third connecting end (13) facing the vehicle interior and on the side of the second connecting end (12) facing the front direction of the vehicle, the second connecting end (12) is used for being connected to a front subframe longitudinal beam (800), the third connecting end (13) is used for being connected to a steering knuckle, and the first connecting end (11) is connected to the first connecting support (2) through a connecting piece (5), and the first connecting support (2) is used for being connected to the front subframe longitudinal beam (800). The first connecting support (2) is provided with an induced deformation structure (24), and the part of the first connecting support (2) provided with the induced deformation structure (24) is used for being broken under the action of concentrated stress so as to make the connecting piece (5) separate from the first connecting support (2) when the vehicle is subjected to a bias collision.

2. The hemline arm assembly of claim 1, wherein, The first connecting support (2) comprises a first plate body (21), a second plate body (22) and a third plate body (23) connected in sequence and surrounding a containing groove (25), the first plate body (21) and the third plate body (23) are arranged in positive directions along the front-rear direction of the vehicle, the slot opening of the containing groove (25) is arranged to face outward, the first connecting end (11) is located in the containing groove (25), the connecting piece (5) passes through the first plate body (21), the first connecting end (11) and the third plate body (23) in sequence, and at least one of the first plate body (21), the second plate body (22) and the third plate body (23) is provided with the induced deformation structure (24), and at least one of the first plate body (21), the second plate body (22) and the third plate body (23) is used for being connected to the front subframe longitudinal beam (800) through a fastener.

3. The hemline arm assembly of claim 2, wherein, The induced deformation structure (24) comprises a first induced deformation surface (241) and a second induced deformation surface (242) arranged in positive directions, two end surfaces of the second plate body (22) along the up-down direction of the vehicle are respectively configured as the first induced deformation surface (241) and the second induced deformation surface (242), and the interval between the first induced deformation surface (241) and the second induced deformation surface (242) decreases in the direction from the second end to the first end of the second plate body (22); wherein the first end and the second end of the second plate body (22) are opposite ends of the second plate body (22), the first end of the second plate body (22) is connected to one of the first plate body (21) and the third plate body (23), and the second end of the second plate body (22) is connected to the other one of the first plate body (21) and the third plate body (23).

4. The hemline arm assembly of claim 3, wherein, In the thickness direction of the second plate body (22), the interval between the first induced deformation surface (241) and the second induced deformation surface (242) decreases.

5. The hemline arm assembly of claim 3, wherein, The first end of the second plate body (22) is connected to the first plate body (21), the second end of the second plate body (22) is connected to the third plate body (23), and the end of the first plate body (21) away from the second plate body (22) is used for being connected to the front subframe longitudinal beam (800) through a fastener, and the end of the third plate body (23) connected to the second plate body (22) is used for being connected to the front subframe longitudinal beam (800) through a fastener.

6. The hemline arm assembly of claim 5, wherein, The induced deformation structure (24) further comprises a third induced deformation surface (243) arranged on the first plate body (21) and located on the side of the connecting piece (5) close to the second plate body (22), the third induced deformation surface (243) and the first induced deformation surface (241) are located at the same end of the first connecting bracket (2) and intersect at the connection between the first plate body (21) and the second plate body (22), and the thickness of the first plate body (21) at the third induced deformation surface (243) decreases in the direction from the end of the third induced deformation surface (243) close to the connecting piece (5) to the end of the third induced deformation surface (243) away from the connecting piece (5); And / or, the induced deformation structure (24) further comprises a fourth induced deformation surface (244) arranged on the first plate body (21) and located on the side of the connecting piece (5) close to the second plate body (22), the fourth induced deformation surface (244) and the second induced deformation surface (242) are located at the same end of the first connecting bracket (2) and intersect at the connection between the first plate body (21) and the second plate body (22), and the thickness of the first plate body (21) at the fourth induced deformation surface (244) decreases in the direction from the end of the fourth induced deformation surface (244) close to the connecting piece (5) to the end of the fourth induced deformation surface (244) away from the connecting piece (5).

7. The hemline arm assembly of claim 2, wherein, The second plate body (22) is in an arched structure, and / or the first connecting bracket (2) is an aluminum casting.

8. The hemline arm assembly of claim 1, wherein, Further comprising a second connecting bracket (3), the second connecting end (12) is rotatably connected to the second connecting bracket (3) through a bearing (6), and the second connecting bracket (3) is used for being connected to the front subframe longitudinal beam (800); And / or, the lower swing arm assembly further comprises a third connecting bracket (4), the third connecting end (13) is rotatably connected to the third connecting bracket (4) through a ball pin (7), and the third connecting bracket (4) is used for being connected to the steering knuckle.

9. A suspension system characterized by, The lower swing arm assembly as claimed in any one of claims 1-8.

10. A vehicle characterized by comprising: The suspension system as claimed in claim 9. The suspension system as claimed in claim 9.

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