Subframe assembly and vehicle

Abstract

The application relates to the technical field of auxiliary frames, and discloses an auxiliary frame assembly and a vehicle. The auxiliary frame assembly comprises a cross beam body, a suspension support and two longitudinal beam assemblies. In a first direction, the cross beam body is fixedly connected between the two longitudinal beam assemblies. A first cavity is formed in the suspension support. The first cavity has a first opening. In a second direction, the projection of the first opening is located outside the cross beam body. The cross beam body comprises a cross beam upper plate and a cross beam lower plate. The cross beam upper plate and the cross beam lower plate are fixedly connected in a buckling mode. The suspension support is fixedly installed on the cross beam body. In the second direction, part of the suspension support protrudes from the cross beam lower plate. The cross beam upper plate, the cross beam lower plate and the suspension support jointly form a second cavity which is separated from the first cavity. The first direction and the second direction are perpendicular to each other. Thus, the multi-cavity structure of the cross beam body and the suspension support is realized, and the overall dynamic stiffness of the auxiliary frame assembly is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sub-frame, in particular to a sub-frame assembly and a vehicle. BACKGROUND

[0002] As a force transmission structure connected between the suspension and the vehicle body, the sub-frame assembly can reduce the vibration and noise transmitted from the suspension to the vehicle body to a certain extent. However, with the rapid development of the automobile industry, the power types of automobiles become more and more complex, and thus higher requirements are put forward for the reliability and performance of the sub-frame.

[0003] In the related art, the cross beam structure in the sub-frame assembly has poor dynamic stiffness, which affects the overall dynamic stiffness of the sub-frame assembly, resulting in poor vibration isolation performance of the sub-frame assembly and greatly reducing the NVH performance of the sub-frame assembly. SUMMARY

[0004] The present application provides a sub-frame assembly and a vehicle. The cross beam body in the sub-frame assembly is integrally installed with a suspension bracket. A first cavity is formed in the suspension bracket. The cross beam body includes a cross beam upper plate and a cross beam lower plate. The side wall of the cross beam upper plate is fixedly connected to the side wall of the cross beam lower plate in an upper-lower manner and forms a second cavity together with the suspension bracket, which is separated from the first cavity. This arrangement realizes a multi-cavity structure of the cross beam body and the suspension bracket, which is conducive to improving the dynamic stiffness of the suspension mounting point of the cross beam body, thereby improving the overall dynamic stiffness of the sub-frame and further improving the vibration isolation performance and NVH performance of the sub-frame.

[0005] To achieve the above-mentioned purpose, the main technical scheme adopted by the present application includes:

[0006] In a first aspect, the present application provides a sub-frame assembly, which includes a cross beam body, a suspension bracket, and two longitudinal beam assemblies. The cross beam body is fixedly connected between the two longitudinal beam assemblies in a first direction.

[0007] The suspension bracket has a first cavity formed therein. The first cavity has a first opening. The projection of the first opening is located outside the cross beam body in a second direction.

[0008] The cross beam body includes a cross beam upper plate and a cross beam lower plate. The cross beam upper plate is fixedly connected to the cross beam lower plate. The suspension bracket is fixedly installed on the cross beam body. In the second direction, part of the suspension bracket protrudes from the cross beam lower plate. The cross beam upper plate, the cross beam lower plate, and the suspension bracket jointly form a second cavity which is separated from the first cavity. The first direction is perpendicular to the second direction.

[0009] The cross beam body of the subframe assembly is integrally provided with the suspension support, a first cavity is formed in the suspension support, the cross beam body includes a cross beam upper plate and a cross beam lower plate, the side wall of the cross beam upper plate is fixed to the side wall of the cross beam lower plate in a top-to-bottom manner, and the cross beam upper plate and the cross beam lower plate together form a second cavity that is separated from the first cavity. In this way, the cross beam body and the suspension support are provided with a multi-cavity structure. When the cross beam body is subjected to an external force, the two cavities formed by the suspension support and the cross beam body can improve the anti-deformation capability of the cross beam body at the suspension support, thereby improving the dynamic stiffness of the suspension mounting point of the cross beam body, and further improving the overall dynamic stiffness of the subframe, and further improving the vibration isolation performance and NVH performance of the subframe.

[0010] Optionally, the width of the suspension support is smaller than the width of the cross beam body in the third direction, wherein the third direction is perpendicular to the first direction and the second direction.

[0011] In this way, the side wall of the suspension support away from the first opening is spaced apart from the side wall of the cross beam body away from the first opening, which is equivalent to reducing the volume of the second cavity at the connection between the suspension support and the cross beam body, thereby further improving the dynamic stiffness of the suspension mounting point of the cross beam body.

[0012] Optionally, the suspension support includes a suspension upper support and a suspension lower support, part of the suspension upper support is fixedly installed on the inner surface of the cross beam upper plate, the cross beam lower plate has a mounting groove, the suspension lower support is arranged in the mounting groove and fixedly connected with the mounting groove, wherein part of the suspension lower support protrudes from the cross beam lower plate in the second direction, and the side wall of the suspension lower support is further fixed with the side wall of the suspension upper support to jointly form the first cavity.

[0013] In this way, two cavities that are not communicated with each other are formed on the cross beam body and the suspension support, which is conducive to improving the dynamic stiffness of the suspension mounting point of the cross beam body, and the suspension support has a simple structure and is convenient to assemble, thereby saving production costs.

[0014] Optionally, the longitudinal beam assembly includes a longitudinal beam body, the longitudinal beam body is fixedly connected with the cross beam body, and a third cavity is formed in the longitudinal beam body, wherein the third cavity is not communicated with the first cavity and the second cavity.

[0015] In this way, the two longitudinal beam bodies and the cross beam body form a three-cavity structure that is not communicated with each other, which is conducive to improving the overall stiffness and strength of the subframe assembly.

[0016] Optionally, the longitudinal beam body has a first end and a second end in the extension direction of the longitudinal beam body, and a plurality of induction recesses are arranged in the longitudinal beam body in sequence and at intervals from the first end to the second end.

[0017] In this way, when the vehicle collides in the second direction, assuming that the collision force propagates from the first end to the second end, the plurality of induced recesses of the longitudinal beam body can collapse to absorb energy, thereby reducing damage to the vehicle and personnel caused by the collision.

[0018] Optionally, the longitudinal beam assembly further comprises a connecting pipe and a bushing, the longitudinal beam body has a first end and a second end in the extension direction of the longitudinal beam body, the longitudinal beam body has a first body mounting hole and a second body mounting hole arranged at intervals from the first end to the second end, a part of the connecting pipe is fixedly mounted in the first body mounting hole, and the bushing is arranged in the second body mounting hole and fixedly connected with the longitudinal beam body, the connecting pipe and the bushing are used for being fixedly connected with the vehicle body, and the bushing is closer to the passenger compartment of the vehicle body than the connecting pipe.

[0019] In this way, the bushing helps to reduce the vibration and impact on the passenger compartment, thereby improving the driving experience of the passengers, and meanwhile, the connecting pipe and the bushing can divide the third cavity in the longitudinal beam body to some extent, thereby helping to improve the stability and rigidity of the longitudinal beam body and further improve the overall rigidity and strength of the subframe assembly.

[0020] Optionally, the longitudinal beam assembly further comprises a first swing arm mounting bracket and a second swing arm mounting bracket, the first swing arm mounting bracket is fixedly arranged at the first end and is used for mounting a front swing arm, and the second swing arm mounting bracket is fixedly arranged between the first body mounting hole and the second body mounting hole from the first end to the second end and is used for mounting a rear swing arm.

[0021] In this way, the integration design of the mounting function of the longitudinal beam body is further improved.

[0022] Optionally, the longitudinal beam body has a first stabilizer connecting hole, the second swing arm mounting bracket has a second stabilizer connecting hole arranged correspondingly to the first stabilizer connecting hole, and the first stabilizer connecting hole and the second stabilizer connecting hole are used for being fixedly connected with a stabilizer.

[0023] In this way, the stabilizer mounting point is integrated on the second swing arm mounting bracket, the integration design of the mounting function of the second swing arm mounting bracket is realized, and thus the traditional stabilizer mounting bracket can be cancelled, thereby helping to reduce the number of parts.

[0024] Optionally, the longitudinal beam body comprises a longitudinal beam upper plate and a longitudinal beam lower plate, the side wall of the longitudinal beam upper plate is fixedly buckled with the side wall of the longitudinal beam lower plate to jointly form the third cavity, the longitudinal beam upper plate is fixedly connected with the cross beam upper plate, and the longitudinal beam lower plate is fixedly connected with the cross beam lower plate.

[0025] Optionally, the longitudinal beam assembly further comprises a support pipe, the longitudinal beam upper plate has a first steering gear mounting portion, the longitudinal beam lower plate has a second steering gear mounting portion arranged opposite to the first steering gear mounting portion, the first steering gear mounting portion and the second steering gear mounting portion are arranged between the first vehicle body mounting hole and the first stabilizer bar connecting hole in the direction from the first end to the second end, and the support pipe is arranged in the third cavity and fixedly connected between the first steering gear mounting portion and the second steering gear mounting portion.

[0026] In this way, the integration of the longitudinal beam body mounting function is further realized, and the support pipe can further divide the third cavity, thereby facilitating further improvement of the stability and rigidity of the longitudinal beam body, and further improvement of the overall rigidity and strength of the subframe assembly.

[0027] In a second aspect, the embodiments of the present application provide a vehicle comprising the subframe assembly in the first aspect.

[0028] The vehicle provided by the second aspect of the present application has the subframe assembly described above, and the beam body in the subframe assembly is integrally mounted with the suspension bracket, wherein the first cavity is formed in the suspension bracket, the beam body comprises a beam upper plate and a beam lower plate, the side wall of the beam upper plate is fixedly coupled with the side wall of the beam lower plate in an up-down manner and forms a second cavity together with the suspension bracket, the second cavity is separated from the first cavity, in this way, the multi-cavity structure of the beam body and the suspension bracket is realized, when the beam body is subjected to an external force, the two cavities formed by the suspension bracket and the beam body can improve the deformation resistance of the beam body at the suspension bracket, which is conducive to improving the dynamic stiffness of the beam body suspension mounting point, thereby improving the overall dynamic stiffness of the subframe, and further improving the vibration isolation performance and NVH performance of the subframe. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the specific embodiments or the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0030] Figure 1 a top view of the subframe assembly provided by an embodiment of the present application;

[0031] Figure 2 a bottom view of the subframe assembly provided by an embodiment of the present application;

[0032] Figure 3 a perspective view of the subframe assembly provided by an embodiment of the present application;

[0033] Figure 4An assembly view of the cross beam body and the suspension bracket provided for an embodiment of the present application;

[0034] Figure 5 A partial enlarged view of the subframe assembly provided for an embodiment of the present application;

[0035] Figure 6 A top view of the longitudinal beam body provided for an embodiment of the present application;

[0036] Figure 7 A perspective view of the longitudinal beam upper plate provided for an embodiment of the present application;

[0037] Figure 8 A perspective view of the longitudinal beam lower plate provided for an embodiment of the present application.

[0038]

BRIEF DESCRIPTION OF DRAWINGS

[0039] The subframe assembly 100;

[0040] The cross beam body 1; the cross beam upper plate 11; the mounting hole 111; the cross beam lower plate 12; the mounting groove 121;

[0041] The suspension bracket 2; the first cavity 21; the first opening 211; the suspension upper bracket 22; the suspension lower bracket 23;

[0042] The longitudinal beam assembly 3; the longitudinal beam body 31; the first end 311; the second end 312; the induction recess 313; the first vehicle body mounting hole 314; the second vehicle body mounting hole 315; the first stabilizer bar connecting hole 316; the longitudinal beam upper plate 317; the first steering gear mounting portion 3171; the longitudinal beam lower plate 318; the second steering gear mounting portion 3181; the connecting pipe 32; the bushing 33; the first swing arm mounting bracket 34; the second swing arm mounting bracket 35; the second stabilizer bar connecting hole 351;

[0043] The first direction X; the second direction Y; the third direction Z. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0045] Unless otherwise defined, all technical and scientific terms used in the application have the same meanings as those commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The use of the terms "including," "comprising," or "having" in the description of the application herein is not intended to exclude or require the presence of any

[0046] Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all referring to a common embodiment, or an embodiment that is independent of all other embodiments. One of ordinary skill in the art will readily recognize from the disclosure herein, that the embodiments described herein can be incorporated into other embodiments.

[0047] In the description of the application, it is necessary to explain that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "attaching" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0048] The term "and / or" in the application is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in the application generally represents that the front and rear associated objects have an "or" relationship.

[0049] "Multiple" appearing in the application refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0050] The subframe assembly, as a force transmission structure connected between the suspension and the vehicle body, can reduce the vibration and noise transmitted from the suspension to the vehicle body to a certain extent, but with the rapid development of the automobile industry, the power type of the automobile is more and more complex, and thus higher requirements are put forward for the reliability and use performance of the subframe.

[0051] In the related art, the cross beam structure in the auxiliary frame assembly has poor dynamic stiffness, which affects the overall dynamic stiffness of the auxiliary frame assembly, and results in poor vibration isolation performance of the auxiliary frame assembly, and greatly reduces the NVH performance of the auxiliary frame assembly.

[0052] Based on this, the application provides an auxiliary frame assembly 100, and the cross beam body 1 in the auxiliary frame assembly 100 is integrally provided with a suspension bracket 2, wherein the suspension bracket 2 is formed with a first cavity 21, the cross beam body 1 includes a cross beam upper plate 11 and a cross beam lower plate 12, the side wall of the cross beam upper plate 11 is fixedly connected with the side wall of the cross beam lower plate 12 in an upper-lower clamping mode, and the cross beam upper plate 11 and the cross beam lower plate 12 together form a second cavity that is separated from the first cavity 21. In this way, the cross beam body 1 and the suspension bracket 2 are provided with a multi-cavity structure, which is beneficial to improve the dynamic stiffness of the suspension mounting point of the cross beam body 1, thereby being beneficial to improve the overall dynamic stiffness of the auxiliary frame, and further improving the vibration isolation performance and the NVH performance of the auxiliary frame.

[0053] As shown in Figures 1-8 , the auxiliary frame assembly 100 according to the first aspect of the application includes a cross beam body 1, a suspension bracket 2, and two longitudinal beam assemblies 3.

[0054] Among them, along the first direction X, the cross beam body 1 is fixedly connected between the two longitudinal beam assemblies 3, the suspension bracket 2 is formed with a first cavity 21, the first cavity 21 has a first opening 211, along the second direction Y, the projection of the first opening 211 is located outside the cross beam body 1, the cross beam body 1 includes a cross beam upper plate 11 and a cross beam lower plate 12, the cross beam upper plate 11 is fixedly connected with the cross beam lower plate 12 in a clamping mode, the suspension bracket 2 is fixedly installed on the cross beam body 1, and along the second direction Y, part of the suspension bracket 2 protrudes from the cross beam lower plate 12, the cross beam upper plate 11, the cross beam lower plate 12, and the suspension bracket 2 together form a second cavity that is separated from the first cavity 21, wherein the first direction X and the second direction Y are perpendicular to each other.

[0055] Specifically, as shown in Figures 1-3 , the cross beam body 1 extends along the first direction X as a whole, the two longitudinal beam assemblies 3 are fixedly installed on the two sides of the cross beam body 1, and further, taking the placement direction of the auxiliary frame assembly 100 as shown in Figure 3 as an example for description, wherein the cross beam body 1 is integrally provided with the suspension bracket 2, the suspension bracket 2 is formed with the first cavity 21, and one end of the first cavity 21 has an open first opening 211.

[0056] Further, the beam body 1 comprises a beam upper plate 11 and a beam lower plate 12 which are connected in a top-down clamping manner, wherein the side wall of the beam upper plate 11 and the side wall of the beam lower plate 12 jointly form the side wall of the beam body 1, and it can be understood that, in some embodiments of the present application, the first opening 211 is aligned with the side wall of the beam body 1 on one side of the beam body 1.

[0057] In the process of assembling the suspension bracket 2 and the beam body 1, the part of the suspension bracket 2 is fixedly connected to the inner surface of the beam upper plate 11, and the part of the suspension bracket 2 is fixedly connected to the beam lower plate 12, and at the same time, along the second direction Y, the projection of the first opening 211 is located outside the beam body 1, for example, the first opening 211 is aligned with the side wall of the beam body 1, further, the second cavity is formed by the beam upper plate 11, the beam lower plate 12 and the suspension bracket 2, it should be noted that the first cavity 21 and the second cavity are separated by the suspension bracket 2, and since the first opening 211 of the suspension bracket 2 is located outside the second cavity, the beam body 1 and the suspension bracket 2 jointly form two cavities which are not communicated with each other, when the beam body 1 is subjected to an external force, the two cavities formed by the suspension bracket 2 and the beam body 1 can improve the deformation resistance of the beam body 1 at the suspension bracket 2, thereby facilitating to improve the dynamic stiffness of the suspension mounting point of the beam body 1. Further, along the second direction Y, the part of the suspension bracket 2 protrudes from the beam lower plate 12, that is, after the suspension bracket 2 and the beam body 1 are assembled, the part of the suspension bracket 2 protrudes from the outer side of the beam body 1 along the second direction Y, in this way, the volume of the first cavity 21 is increased, and the first cavity 21 can provide better energy absorption effect, thereby facilitating to further improve the dynamic stiffness of the beam body 1 at the suspension bracket 2, and further facilitating to improve the overall dynamic stiffness, vibration isolation performance and NVH performance of the subframe.

[0058] It should be noted that the outer surfaces of the beam upper plate 11 and the beam lower plate 12 can be provided with a plurality of reinforcing ribs, and the extending direction of the reinforcing ribs is consistent with the extending direction of the beam upper plate 11 and the beam lower plate 12, in this way, it is beneficial to further improve the structural strength of the beam body 1, thereby further improving the dynamic stiffness of the beam body 1.

[0059] The cross beam body 1 in the auxiliary frame assembly 100 proposed in the first aspect of the present application is integrally provided with the suspension bracket 2, wherein the suspension bracket 2 is internally formed with a first cavity 21, the cross beam body 1 includes a cross beam upper plate 11 and a cross beam lower plate 12, the side wall of the cross beam upper plate 11 is fixedly coupled with the side wall of the cross beam lower plate 12 in an up-down manner and forms a second cavity together with the suspension bracket 2, which is separated from the first cavity 21. In this way, the multi-cavity structure of the cross beam body 1 and the suspension bracket 2 is achieved, which is conducive to improving the dynamic stiffness of the suspension mounting point of the cross beam body 1, thereby improving the overall dynamic stiffness of the auxiliary frame, and further improving the vibration isolation performance and NVH performance of the auxiliary frame.

[0060] In some embodiments of the present application, as shown in Figure 1 and Figure 2 , along the third direction Z, the width of the suspension bracket 2 is smaller than the width of the cross beam body 1, wherein the third direction Z is perpendicular to the first direction X and the second direction Y. In this way, since the width of the suspension bracket 2 is smaller than the width of the cross beam body 1, the side wall of the suspension bracket 2 away from the first opening 211 is spaced apart from the side wall of the cross beam body 1 away from the first opening 211, which is equivalent to reducing the volume of the second cavity at the connection between the suspension bracket 2 and the cross beam body 1, and is conducive to further improving the dynamic stiffness of the suspension mounting point of the cross beam body.

[0061] In some embodiments of the present application, as shown in Figure 3 and Figure 4 , the suspension bracket 2 includes a suspension upper bracket 22 and a suspension lower bracket 23, part of the suspension upper bracket 22 is fixedly installed on the inner surface of the cross beam upper plate 11, the cross beam lower plate 12 is provided with a mounting groove 121, the suspension lower bracket 23 is arranged in the mounting groove 121 and fixedly connected with the mounting groove 121, wherein part of the suspension lower bracket 23 protrudes from the cross beam lower plate 12 along the second direction Y, and the side wall of the suspension lower bracket 23 is further fixedly coupled with the side wall of the suspension upper bracket 22 in an up-down manner to jointly form the first cavity 21.

[0062] Specifically, the suspension bracket 2 comprises a suspension upper bracket 22 and a suspension lower bracket 23 oppositely arranged along the second direction Y, wherein the side wall of the suspension upper bracket 22 is fixedly buckled with the side wall of the suspension lower bracket 23 to jointly form the first cavity 21 with an open end, further, the cross beam upper plate 11 has the mounting hole 111, the cross beam lower plate 12 has the mounting slot 121, when the suspension upper bracket 22 and the suspension lower bracket 23 are assembled, the suspension upper bracket 22 is fixedly connected with the inner surface of the cross beam upper plate 11 and covers the mounting hole 111, and the suspension lower bracket 23 is arranged in the mounting slot 121 and fixedly connected with the mounting slot 121, at the same time, part of the suspension lower bracket 23 protrudes from the cross beam lower plate 12 along the second direction Y, so that two cavities which are not communicated with each other are formed on the cross beam body 1 and the suspension bracket 2, which is beneficial to improve the dynamic stiffness of the suspension mounting point of the cross beam body 1, and the suspension bracket 2 has simple structure and convenient assembly, which is beneficial to save production cost.

[0063] In some embodiments of the present application, as shown in Figure 1 and Figure 2 , the longitudinal beam assembly 3 comprises a longitudinal beam body 31 fixedly connected with the cross beam body 1, and a third cavity is formed in the longitudinal beam body 31, wherein the third cavity is not communicated with the first cavity 21 and the second cavity. Specifically, each longitudinal beam assembly 3 comprises a longitudinal beam body 31, as shown in Figure 1 and Figure 2 , two longitudinal beam bodies 31 are fixedly arranged on the two sides of the cross beam body 1, and the third cavity is formed in the longitudinal beam body 31, so that the two longitudinal beam bodies 31 and the cross beam body 1 form a three-cavity structure which is not communicated with each other, which is beneficial to improve the overall stiffness and strength of the sub-frame assembly 100.

[0064] In some embodiments of the present application, as shown in Figure 6 and Figure 7 , along the extension direction of the longitudinal beam body 31, the longitudinal beam body 31 has a first end 311 and a second end 312, and a plurality of induction recesses 313 are arranged in the longitudinal beam body 31 in sequence and at intervals from the first end 311 to the second end 312.

[0065] Specifically, in the extension direction of the longitudinal beam body 31, the longitudinal beam body 31 has opposite first and second ends 311 and 312, and a plurality of induction recesses 313 are sequentially and spaced apart from each other in the direction from the first end 311 to the second end 312. In this way, when the vehicle collides, assuming that the collision force propagates from the first end 311 to the second end 312, the plurality of induction recesses 313 of the longitudinal beam body 31 can collapse and absorb energy, thereby reducing the damage caused by the collision to the vehicle and the passengers. It should be noted that in the direction from the first end 311 to the second end 312, the cross section of the front half of the longitudinal beam body 31 is smaller than the cross section of the rear half of the longitudinal beam body 31, so as to ensure that the front half of the longitudinal beam body 31 deforms greatly when the vehicle collides, and the rear half of the longitudinal beam body 31 deforms less or does not deform at all, thereby improving the protection capability for passengers.

[0066] In some embodiments of the present application, as shown in Figures 1-3 and Figure 5 The longitudinal beam assembly 3 further includes a connecting pipe 32 and a bushing 33. In the extension direction of the longitudinal beam body 31, the longitudinal beam body 31 has first and second ends 311 and 312, and the longitudinal beam body 31 has first and second body mounting holes 314 and 315 spaced apart from each other in the direction from the first end 311 to the second end 312. The connecting pipe 32 is fixedly installed in the first body mounting hole 314, and the bushing 33 is arranged in the second body mounting hole 315 and fixedly connected with the longitudinal beam body 31. The connecting pipe 32 and the bushing 33 are used to be fixedly connected with the vehicle body, and the bushing 33 is closer to the passenger compartment of the vehicle body than the connecting pipe 32.

[0067] Specifically, the longitudinal beam body 31 is integrally provided with two body mounting points, i.e., the first and second body mounting holes 314 and 315. The first body mounting hole 314 is fixedly connected with the vehicle body through the connecting pipe 32, and the second body mounting hole 315 is fixedly connected with the vehicle body through the bushing 33. It should be noted that the connecting pipe 32 is rigidly connected with the vehicle body, while the bushing 33 is an elastic member and is flexibly connected with the vehicle body. In addition, the bushing 33 is closer to the passenger compartment of the vehicle body than the connecting pipe 32. In this way, the bushing 33 is beneficial to reduce the vibration and impact on the passenger compartment, thereby improving the driving experience of the passengers.

[0068] In some embodiments of the present application, the connecting pipe 32 is fixedly installed in the first body mounting hole 314, and the bushing 33 is arranged in the second body mounting hole 315. In this way, the connecting pipe 32 and the bushing 33 can divide the third cavity in the longitudinal beam body 31, thereby improving the stability and rigidity of the longitudinal beam body 31, and further improving the overall rigidity and strength of the subframe assembly 100.

[0069] In some embodiments of the present application, the first vehicle body mounting hole 314 has a flange, and the first vehicle body mounting hole 314 is welded to the connecting pipe 32 through the flange. In this way, the welding contact area of the connecting pipe 32 and the first vehicle body mounting hole 314 is increased by face contact welding, thereby facilitating the increase of the connection strength of the connecting pipe 32 and the longitudinal beam body 31, and avoiding defects such as welding falling off of the connecting pipe 32 and the longitudinal beam body 31.

[0070] In some embodiments of the present application, as shown in Figures 1-3 The longitudinal beam assembly 3 further includes a first swing arm mounting bracket 34 and a second swing arm mounting bracket 35. The first swing arm mounting bracket 34 is fixedly arranged at the first end 311 and is used for mounting a front swing arm. The second swing arm mounting bracket 35 is fixedly arranged between the first vehicle body mounting hole 314 and the second vehicle body mounting hole 315 and is used for mounting a rear swing arm. That is, the longitudinal beam body 31 is also integrated with mounting points of the front swing arm and the rear swing arm. The longitudinal beam body 31 is connected to the front swing arm through the first swing arm mounting bracket 34, and is also connected to the rear swing arm through the second swing arm mounting bracket 35. In this way, the integration design of the mounting function of the longitudinal beam body 31 is further improved. It should be noted that the second swing arm mounting bracket 35 is provided with a reinforcing rib and a stepped surface, which is beneficial to improve the strength of the second swing arm mounting bracket 35, thereby improving the connection strength of the longitudinal beam body 31 and the rear swing arm.

[0071] In some embodiments of the present application, as shown in Figure 1 and Figure 6 The longitudinal beam body 31 has two first stabilizer connecting holes 316, and the second swing arm mounting bracket 35 has two second stabilizer connecting holes 351 corresponding to the first stabilizer connecting holes 316. The first stabilizer connecting holes 316 and the second stabilizer connecting holes 351 are used for fixedly connecting with stabilizers.

[0072] Specifically, the second swing arm mounting bracket 35 is assembled with the first stabilizer connecting holes 316 through the second stabilizer connecting holes 351, and is fixedly connected with the first stabilizer connecting holes 316 and the second stabilizer connecting holes 351 through the stabilizers. In this way, not only the fixed connection between the second swing arm mounting bracket 35 and the longitudinal beam body 31 is achieved, but also the stabilizer mounting points are integrated on the second swing arm mounting bracket 35, thereby realizing the integration design of the mounting function of the second swing arm mounting bracket 35, and the traditional stabilizer mounting bracket can be cancelled, which is beneficial to reduce the number of parts.

[0073] In some embodiments of the present application, as shown in Figures 6-8As shown, the longitudinal beam body 31 comprises a longitudinal beam upper plate 317 and a longitudinal beam lower plate 318, the side wall of the longitudinal beam upper plate 317 is fixedly buckled with the side wall of the longitudinal beam lower plate 318 to jointly form a third cavity, wherein the longitudinal beam upper plate 317 is fixedly connected with the cross beam upper plate 11, and the longitudinal beam lower plate 318 is fixedly connected with the cross beam lower plate 12. That is, the longitudinal beam body 31 comprises the oppositely arranged longitudinal beam upper plate 317 and longitudinal beam lower plate 318, the side wall of the longitudinal beam upper plate 317 is fixedly buckled with the side wall of the longitudinal beam lower plate 318 to jointly form a third cavity, further, the longitudinal beam upper plate 317 is fixedly connected with the cross beam upper plate 11, and the longitudinal beam lower plate 318 is fixedly connected with the cross beam lower plate 12, wherein the connection between the longitudinal beam upper plate 317 and the cross beam upper plate 11 is in a whole circular arc structure, and the connection between the longitudinal beam lower plate 318 and the cross beam lower plate 12 is in a whole circular arc structure, so that the collision force between the longitudinal beam body 31 and the cross beam body 1 is better conducted, and the collision force is more dispersed.

[0074] In some embodiments of the present application, the second swing arm mounting bracket 35 comprises a first mounting plate, a second mounting plate and a connecting plate, wherein the connecting plate is connected between the first mounting plate and the second mounting plate, the first mounting plate is fixedly connected with the longitudinal beam upper plate 317, and the second mounting plate is fixedly connected with the longitudinal beam lower plate 318, so that the connection strength between the second swing arm mounting bracket 35 and the longitudinal beam body 31 is improved.

[0075] In some embodiments of the present application, the longitudinal beam assembly 3 further comprises a support pipe, the longitudinal beam upper plate 317 has two first steering gear mounting portions 3171, the longitudinal beam lower plate 318 has two second steering gear mounting portions 3181 which are oppositely arranged one by one corresponding to the first steering gear mounting portions 3171, and the first steering gear mounting portions 3171 and the second steering gear mounting portions 3181 are arranged between the first vehicle body mounting hole 314 and the first stabilizer connecting hole 316 in the direction from the first end 311 to the second end 312, the support pipe is arranged in the third cavity, and the support pipe is fixedly connected between the first steering gear mounting portions 3171 and the second steering gear mounting portions 3181.

[0076] Specifically, the longitudinal beam upper plate 317 is designed as a large plane as a whole, the first steering gear mounting portion 3171 is configured as a mounting boss, the center of the first steering gear mounting portion 3171 is provided with a first assembly hole, further, the longitudinal beam lower plate 318 is provided with a second steering gear mounting portion 3181 opposite to the first steering gear mounting portion 3171, and the second steering gear mounting portion 3181 is provided with a second assembly hole opposite to the first assembly hole 111. In this way, the steering gear can be fixedly connected with the first steering gear mounting portion 3171 and the second steering gear mounting portion 3181 in a bolt-nut cooperation manner. For example, the bolt passes through the mounting portion of the steering gear, then passes through the first assembly hole and the second assembly hole in sequence, and then the bolt is tightened by the nut to realize the fixed connection between the steering gear and the longitudinal beam body 31, thereby further realizing the integration of the longitudinal beam body 31 installation function.

[0077] Further, the longitudinal beam assembly 3 further comprises a support pipe arranged in the third cavity and fixedly connected between the first steering gear mounting portion 3171 and the second steering gear mounting portion 3181. It can be understood that the through hole of the support pipe is opposite to the first assembly hole and the second assembly hole, so that the bolt can pass through the support pipe, and the support pipe can further divide the third cavity, thereby further improving the stability and rigidity of the longitudinal beam body 31, and further improving the overall rigidity and strength of the subframe assembly 100.

[0078] The vehicle according to the first aspect of the present application comprises the subframe assembly 100 according to the first aspect of the present application.

[0079] The vehicle according to the second aspect of the present application is provided with the above-mentioned subframe assembly 100, and the cross beam body 1 in the subframe assembly 100 is integrally provided with the suspension bracket 2. The first cavity 21 is formed in the suspension bracket 2, the cross beam body 1 comprises a cross beam upper plate 11 and a cross beam lower plate 12, the side wall of the cross beam upper plate 11 is fixedly coupled with the side wall of the cross beam lower plate 12 in an up-down manner and forms a second cavity together with the suspension bracket 2, which is separated from the first cavity 21. In this way, the multi-cavity structure of the cross beam body 1 and the suspension bracket 2 is realized. When the cross beam body 1 is subjected to an external force, the two cavities formed by the suspension bracket 2 and the cross beam body 1 can improve the anti-deformation ability of the cross beam body 1 at the suspension bracket 2, which is beneficial to improve the dynamic stiffness of the suspension mounting point of the cross beam body 1, thereby improving the overall dynamic stiffness of the subframe, and further improving the vibration isolation performance and NVH performance of the subframe.

[0080] It should also be noted that the terms "comprises" and / or "comprising", or "includes" and / or "including" when used in this specification, specify the presence of stated features, integers, steps, operations, elements, or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof. In the context of the specification, the term "and / or" means "and" or "or", and the term "or" means "and" or "or". In the context of the specification, the term "exemplary" means "example" or "an example of".

[0081] Each of the embodiments in the specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other. Each of the embodiments focuses on the difference from other embodiments. In particular, for the system embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the part of the method embodiments.

[0082] The above only describes the embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

[0083] Although the embodiments of the present application are described in conjunction with the drawings, those skilled in the art can make various modifications and changes without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. A subframe assembly, characterized in that, The beam body, the suspension bracket and two longitudinal beam assemblies are fixedly connected along a first direction. The suspension bracket has a first cavity with a first opening, and the projection of the first opening is located outside the beam body along a second direction. The beam body includes a beam upper plate and a beam lower plate, and the beam upper plate is fixedly connected with the beam lower plate. The suspension bracket is fixedly installed on the beam body, and part of the suspension bracket protrudes from the beam lower plate along the second direction. The beam upper plate, the beam lower plate and the suspension bracket jointly form a second cavity separated from the first cavity.

2. The subframe assembly of claim 1, wherein The suspension bracket includes a suspension upper bracket and a suspension lower bracket.

3. The subframe assembly of claim 1, wherein, Part of the suspension upper bracket is fixedly installed on the inner surface of the beam upper plate and covers the mounting hole.

4. The subframe assembly of claim 3, wherein, The beam lower plate has a mounting slot, and the suspension lower bracket is arranged in the mounting slot and fixedly connected with the mounting slot.

5. The subframe assembly of claim 3, wherein Part of the suspension lower bracket protrudes from the beam lower plate along the second direction, and the side wall of the suspension lower bracket is fixedly connected with the side wall of the suspension upper bracket to jointly form the first cavity.

6. The subframe assembly of claim 5, wherein, The width of the suspension bracket is smaller than the width of the beam body along a third direction. The longitudinal beam assembly includes a longitudinal beam body fixedly connected with the beam body. The longitudinal beam body has a first end and a second end along the extension direction of the longitudinal beam body. The longitudinal beam body has a plurality of induction recesses arranged in sequence from the first end to the second end. The longitudinal beam assembly further includes a connecting pipe and a bushing. The longitudinal beam body has a first body mounting hole and a second body mounting hole arranged in sequence from the first end to the second end along the extension direction of the longitudinal beam body. Part of the connecting pipe is fixedly installed in the first body mounting hole. The bushing is arranged in the second body mounting hole and fixedly connected with the longitudinal beam body. The connecting pipe and the bushing are used for fixedly connecting with the vehicle body. The bushing is closer to the passenger compartment of the vehicle body than the connecting pipe. The longitudinal beam assembly further includes a first swing arm mounting bracket and a second swing arm mounting bracket. The first swing arm mounting bracket is arranged at the first end and used for mounting a front swing arm. The second swing arm mounting bracket is fixedly installed between the first body mounting hole and the second body mounting hole and used for mounting a rear swing arm.

7. The subframe assembly of claim 6, wherein The longitudinal beam body has a first stabilizer connecting hole, and the second swing arm mounting bracket has a second stabilizer connecting hole arranged correspondingly to the first stabilizer connecting hole, and the first stabilizer connecting hole and the second stabilizer connecting hole are used for fixed connection with a stabilizer.

8. The subframe assembly of claim 7, wherein, The longitudinal beam body comprises a longitudinal beam upper plate and a longitudinal beam lower plate, and the side wall of the longitudinal beam upper plate is fixedly buckled with the side wall of the longitudinal beam lower plate to jointly form the third cavity, wherein the longitudinal beam upper plate is fixedly connected with the cross beam upper plate, and the longitudinal beam lower plate is fixedly connected with the cross beam lower plate.

9. The subframe assembly of claim 8, wherein, The longitudinal beam assembly further comprises a support pipe, the longitudinal beam upper plate has a first steering gear mounting portion, the longitudinal beam lower plate has a second steering gear mounting portion arranged oppositely to the first steering gear mounting portion, the first steering gear mounting portion and the second steering gear mounting portion are arranged between the first vehicle body mounting hole and the first stabilizer connecting hole in the direction from the first end to the second end, the support pipe is arranged in the third cavity, and the support pipe is fixedly connected between the first steering gear mounting portion and the second steering gear mounting portion.

10. A vehicle characterized by comprising: The subframe assembly comprises the subframe assembly according to any one of claims 1-9.

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