CN221233869U - Rear auxiliary frame and vehicle - Google Patents

Abstract

The application relates to a rear auxiliary frame and a vehicle. The position that left longeron and front beam are connected is provided with first installing support, also is provided with first installing support in the position that right longeron and front beam are connected for install the xarm. The first installing support includes first connecting piece, second connection piece and reinforcing plate, and first connecting piece and second connection piece interconnect, the reinforcing plate is located between first connecting piece and the second connection piece for support first connecting piece and second connection piece, with the intensity that improves first installing support, reduce the possibility that first installing support takes place to warp. The first connecting piece in the first installing support is connected with the front cross beam, and the second connecting piece is connected with the left longitudinal beam or the right longitudinal beam, so that the possibility that the first installing support falls off is reduced, and the reliability of the rear auxiliary frame is improved.

Description

Rear auxiliary frame and vehicle

Technical Field

The application relates to the technical field of automobiles, in particular to a rear auxiliary frame.

Background

The rear auxiliary frame is a component part of an automobile axle and is an important structure on a chassis, is connected with an automobile hub through a control arm and is connected with an automobile body through a suspension, and is used for reducing vibration generated in the running process of the automobile and improving the comfort of the automobile. The rear auxiliary frame is provided with a cross arm installing bracket for installing a cross arm so as to connect the hub with the rear auxiliary frame. In the running process of the vehicle, the cross arm mounting bracket on the rear auxiliary frame can bear larger acting force, so that the cross arm mounting bracket is easy to deform.

Disclosure of utility model

The application provides a rear auxiliary frame which is used for solving the problem that a cross arm mounting bracket is easy to deform.

The embodiment of the application provides a rear auxiliary frame, which comprises:

a front cross member;

the left longitudinal beam and the right longitudinal beam are arranged at intervals along the width direction of the rear auxiliary frame and are connected with the front cross beam;

The first mounting brackets are respectively arranged at the connection position of the left longitudinal beam and the front cross beam and the connection position of the right longitudinal beam and the front cross beam and are used for mounting cross arms;

The first mounting bracket comprises a first connecting piece, a second connecting piece and a reinforcing plate, wherein the first connecting piece is connected with the second connecting piece, the reinforcing plate is located between the first connecting piece and the second connecting piece, the first connecting piece is connected with the front cross beam, and the second connecting piece is connected with the left longitudinal beam or the right longitudinal beam.

In one possible embodiment, the reinforcing plate includes a recess portion and a bent portion, the bent portion being inclined in a width direction of the rear subframe, the recess portion being located at the bent portion.

In one possible embodiment, the first connecting piece comprises a first extension extending in a direction away from the reinforcement plate for connection with the front cross member;

the second connecting piece comprises a second extending part which extends along the direction far away from the reinforcing plate and is used for being connected with the left longitudinal beam or the right longitudinal beam.

In one possible embodiment, the rear subframe further includes a rear cross member disposed at a distance from the front cross member along a length direction of the rear subframe, and both ends of the rear cross member are connected to the left side member and the right side member, respectively;

The rear cross beam comprises a first main body part and a second main body part, wherein the first main body part and the second main body part are of L-shaped structures, one side of the first main body part is connected with one side of the second main body part, and the other side of the first main body part is arranged at intervals; the first main body part with one side that the second main body part interval set up is provided with first connecting portion and second connecting portion respectively, first connecting portion with second connecting portion interconnect.

In one possible embodiment, the rear cross member includes a plurality of lightening holes, and the plurality of lightening holes are provided at intervals to the first body portion and the second body portion.

In one possible embodiment, the lightening hole includes a first lightening hole and a second lightening hole, the first lightening hole being located at two sidewalls of the first body portion and the second body portion which are distant from each other, and a flange being provided along a circumferential direction of the first lightening hole;

the second lightening hole is positioned at a position where the first body portion and the second body portion are connected to each other.

In one possible embodiment, one of the first body portion and the second body portion is provided with a male tang, and the other is provided with a female tang, and the male tang extends into the female tang after the first body portion is connected with the second body portion.

In one possible implementation manner, the rear subframe further comprises a plurality of mounting sleeves, wherein the mounting sleeves are respectively mounted at two ends of the front cross beam, one end of the left longitudinal beam, which is far away from the front cross beam, and one end of the right longitudinal beam, which is far away from the front cross beam.

In one possible embodiment, the mounting sleeve includes a body portion and a mounting portion, the mounting portion being mounted to one end of the body portion, and a cross-sectional area of the mounting portion being greater than a cross-sectional area of the body portion;

and a hobbing is arranged on one side of the mounting part away from the body part.

The embodiment of the application also provides a vehicle, which comprises a rear auxiliary frame, a cross arm, an upper control arm, a lower control arm assembly, a longitudinal arm and a hub, wherein the longitudinal arm is arranged on the hub, the rear auxiliary frame is connected with the hub through the cross arm, the upper control arm and the lower control arm assembly, and the rear auxiliary frame is any one of the rear auxiliary frames.

The application relates to a rear auxiliary frame and a vehicle. The position that left longeron and front beam are connected is provided with first installing support, also is provided with first installing support in the position that right longeron and front beam are connected for install the xarm. The first installing support includes first connecting piece, second connection piece and reinforcing plate, and first connecting piece and second connection piece interconnect, the reinforcing plate is located between first connecting piece and the second connection piece for support first connecting piece and second connection piece, with the intensity that improves first installing support, reduce the possibility that first installing support takes place to warp. The first connecting piece in the first installing support is connected with the front cross beam, and the second connecting piece is connected with the left longitudinal beam or the right longitudinal beam, so that the possibility that the first installing support falls off is reduced, and the reliability of the rear auxiliary frame is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.

Drawings

FIG. 1 is a schematic view of a partial structure of a vehicle according to an embodiment of the present application;

Fig. 2 is a schematic structural view of a rear subframe according to an embodiment of the present application;

Fig. 3 is a schematic structural diagram of a first mounting bracket according to an embodiment of the present application;

Fig. 4 is a schematic view of a partial structure of a rear subframe according to an embodiment of the present application;

Fig. 5 is a schematic structural view of a rear cross member according to an embodiment of the present application;

FIG. 6 is a schematic view of another angle of the rear cross member according to an embodiment of the present application;

FIG. 7 is a schematic view of a mounting sleeve according to an embodiment of the present application;

Fig. 8 is a schematic structural view of another angle of the rear subframe according to an embodiment of the present application.

Reference numerals:

1-a rear subframe;

11-front cross beam;

12-left longitudinal beam;

13-right stringers;

14-a first mounting bracket;

141-a first connecting piece;

141 a-a first extension;

142-a second connecting piece;

142 a-a second extension;

143-reinforcing plates;

143 a-a recess;

143 b-a bend;

143 c-a fixing part;

15-a rear cross beam;

151-a first body portion;

151 a-male tang;

152-a second body portion;

152 a-female seam allowance;

153-lightening holes;

153 a-first lightening holes;

153 b-a second lightening hole;

154-first connection;

155-a second connection;

16-mounting a sleeve;

161-body portion;

162-mounting portion;

163-hobbing;

17-a second mounting bracket;

171-a third connecting piece;

172-fourth connecting pieces;

18-positioning holes;

2-a cross arm;

3-upper control arm;

4-a lower control arm assembly;

41-lower control arm;

42-a damper;

43-stabilizer bar;

5-trailing arms;

6-wheel hub.

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

Detailed Description

For a better understanding of the technical solution of the present application, the following detailed description of the embodiments of the present application refers to the accompanying drawings.

It should be understood that the described embodiments are merely some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

It should be noted that, the terms "upper", "lower", "left", "right", and the like in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In the context of this document, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on the other element or be indirectly on the other element through intervening elements.

As shown in fig. 1, an embodiment of the present application provides a vehicle, which includes a rear subframe 1, a cross arm 2, an upper control arm 3, a lower control arm assembly 4, a trailing arm 5 and a hub 6, wherein the cross arm 2, the upper control arm 3 and the lower control arm assembly 4 are used for connecting the rear subframe 1 with the hub 6, and then are connected with a vehicle body through the rear subframe 1, one end of the trailing arm 5 is connected with the hub 6, and the other end is connected with the vehicle body.

During running of the vehicle, the hub 6 receives an impact force from the road surface, and the lower control arm assembly 4 includes the stabilizer bar 43 and the rear shock absorber 42, so that the impact force transmitted to the rear subframe 1 can be reduced. The rear auxiliary frame 1, the cross arm 2, the upper control arm 3, the lower control arm assembly 4, the trailing arm 5 and the hub 6 in the vehicle are integrated into the rear auxiliary frame assembly, and then the rear auxiliary frame assembly is connected with the vehicle body, so that the assembly efficiency of the vehicle assembly can be improved.

As shown in fig. 1, in one possible embodiment, the lower control arm assembly 4 includes a lower control arm 41, a damper 42, and a stabilizer bar 43, where the damper 42 is mounted on the lower control arm 41 and is capable of absorbing impact energy of a road surface to which the hub 6 is subjected, reducing vibration of the vehicle, and improving stability of running of the vehicle. The stabilizer bar 43 has both ends connected to the two lower control arms 41, respectively, and is capable of bearing lateral force of the vehicle and vibration of the road surface to improve stability and handling of the vehicle.

As shown in fig. 1, 2 and 3, an embodiment of the present application provides a rear attached frame, which includes a front cross member 11, a left side member 12 and a right side member 13, the left side member 12 and the right side member 13 being disposed at intervals in a width direction X of a rear sub-frame 1 and being connected to the front cross member 11. The stabilizer bar 43 is connected to the left side member 12 at a position overlapping the left side member 12, and is connected to the right side member 13 at a position overlapping the right side member 13. A first mounting bracket 14 is provided at the junction of the left side member 12 and the front cross member 11, and a first mounting bracket 14 is also provided at the junction of the right side member 13 and the front cross member 11. The first mounting bracket 14 includes a first connection piece 141, a second connection piece 142, and a reinforcing plate 143, the first connection piece 141 and the second connection piece 142 being connected to each other, the reinforcing plate 143 being located between the first connection piece 141 and the second connection piece 142 for supporting the first connection piece 141 and the second connection piece 142. Taking the first mounting bracket 14 located at the connection position of the left side member 12 and the front cross member 11 as an example, the front cross member 11 and the left side member 12 are located at one side of the first mounting bracket 14, the first connecting piece 141 is connected to the front cross member 11, and the second connecting piece 142 is connected to the left side member 12. Similarly, the first mounting bracket 14 is located at the connection between the left side member 12 and the front cross member 11, the first connecting piece 141 is connected to the front cross member 11, and the second connecting piece 142 is connected to the side member.

The first mounting bracket 14 includes the first connecting piece 141 and the second connecting piece 142, and the first connecting piece 141 and the second connecting piece 142 form the first mounting bracket 14 through welding, and compared with an integrally formed structure, the material utilization rate of the first mounting bracket 14 can be improved. The first connecting piece 141 and the second connecting piece 142 are respectively connected with the front cross beam 11 and the longitudinal beam, so that the connection area between the first mounting bracket 14 and the front cross beam 11, the left longitudinal beam 12 or the right longitudinal beam 13 is increased, the falling possibility of the first mounting bracket 14 can be reduced, and the reliability of the rear auxiliary frame 1 is improved. Be provided with the crossbeam on first installing support 14, wheel hub 6 passes through the crossbeam and is connected with back sub vehicle frame 1, and the effort that wheel hub 6 received can pass through the crossbeam and transmit to first installing support 14, is provided with reinforcing plate 143 between first connection piece 141 and second connection piece 142, can improve the intensity of first installing support 14, reduces the possibility that first installing support 14 takes place to warp, is favorable to improving the reliability and the durability of first installing support 14, and then can improve the life of first installing support 14.

As shown in fig. 3 and 4, in one possible embodiment, both sides of the reinforcing plate 143 are connected to the first connecting piece 141 and the second connecting piece 142, respectively, along the length direction Y of the rear subframe 1, so that the supporting effect on the first connecting piece 141 and the second connecting piece 142 can be improved, which is advantageous in improving the reliability of the first mounting bracket 14. The reinforcing plate 143 is bent in the width direction X of the rear subframe 1 to form a bent portion 143b, and the bent portion 143b is inclined in the width direction X of the rear subframe 1. The reinforcing plate 143 further includes a recess 143a, the recess 143a being located on the bent portion 143b, and the cross arm 2 extending into the first mounting bracket 14 and corresponding to the recess 143a after the cross arm 2 is mounted on the first mounting bracket 14.

Both the bending portion 143b and the concave portion 143a can improve the strength of the reinforcing plate 143, so that the reinforcing plate 143 can bear a larger force, which is beneficial to improving the reliability of the first mounting bracket 14. After the cross arm 2 is mounted on the first mounting bracket 14, one end of the cross arm 2 extends into the space between the first connecting piece 141 and the second connecting piece 142, the reinforcing plate 143 is located between the first connecting piece 141 and the second connecting piece 142, the space between the first connecting piece 141 and the second connecting piece 142 is occupied, a bending part 143b inclined along the width direction X of the rear subframe 1 is arranged in the reinforcing plate 143, and a concave part 143a is arranged on the bending part 143b, so that the space occupation of the reinforcing plate 143 between the first connecting piece 141 and the second connecting piece 142 is reduced, and the possibility that the cross arm 2 and the reinforcing plate 143 interfere is reduced. As shown in fig. 3 and 4, in one possible embodiment, a fixing portion 143c is further provided on one side of the reinforcing plate 143, and the fixing portion 143c can be connected to the left side member 12 or the right side member 13, so that the mounting strength of the first mounting bracket 14 is improved, and the possibility that the first mounting bracket 14 falls off can be reduced.

As shown in fig. 3 and 4, in one possible embodiment, the first connecting piece 141 includes a first extension portion 141a, and the first extension portion 141a is located at a side where the first connecting piece 141 is connected to the front cross member 11. The first extension portion 141a extends to a side away from the reinforcing plate 143, and an edge of the first extension portion 141a is connected to the front cross member 11. The second connecting piece 142 includes a second extension portion 142a, and the second extension portion 142a is located at a side of the second connecting piece 142 connected to the left side member 12 or the right side member 13. The second extension 142a extends to a side away from the reinforcing plate 143, and an edge of the second extension 142a is connected to the left side member 12 or the right side member 13.

The first connecting piece 141 can be connected to the front cross member 11 by welding, and the first extending portion 141a is provided on the side of the first connecting piece 141 connected to the front cross member 11, so that the welding length between the first connecting piece 141 and the front cross member 11 can be increased, and when the first mounting bracket 14 receives the force of the cross member, the possibility of stress concentration can be reduced, and the connection strength between the first connecting piece 141 and the front cross member 11 can be further increased. Similarly, the second extension portion 142a can increase the welding length between the second connection piece 142 and the left side member 12 or the right side member 13, and further increase the connection strength between the second connection piece 142 and the left side member 12 or the right side member 13. The first extension portion 141a and the second extension portion 142a can reduce the possibility of the first mounting bracket 14 falling off, which is beneficial to improving the reliability of the rear subframe 1.

In one possible embodiment, a side of the first extension portion 141a connected to the front cross member 11 may be provided with a burring for increasing a contact area of the first extension portion 141a with the front cross member 11, which can further increase a connection strength of the first connection piece 141 with the front cross member 11. The side of the second extension 142a connected to the left side member 12 or the right side member 13 may also be provided with a burring to enhance the strength of the connection of the second connection piece 142 to the left side member 12 or the right side member 13.

As shown in fig. 4, in a possible embodiment, the rear subframe 1 further comprises two second mounting brackets 17, which second mounting brackets 17 are arranged opposite to the first mounting brackets 14 in the height direction Z of the rear subframe 1 for mounting the upper control arm 3, the end of the upper control arm 3 remote from the second mounting brackets 17 being connected to the hub 6. The second mounting bracket 17 is formed by welding the third connecting piece 171 and the fourth connecting piece 172, and compared with an integrally formed structure, the material utilization rate of the second mounting bracket 17 can be improved. The end of the third connecting piece 171 is welded to the front cross member 11, and the end of the fourth connecting piece 172 is welded to the left side member 12 or the right side member 13, so that the mounting strength of the second mounting bracket 17 can be improved, and the possibility of the second mounting bracket 17 falling off can be reduced.

In one possible embodiment, the first connecting piece 141, the second connecting piece 142, the reinforcing plate 143, the third connecting piece 171 and the fourth connecting piece 172 are each formed by punching a plate material having a thickness of 2.5mm, and then the first mounting bracket 14 and the second mounting bracket 17 are formed by welding, so that the reliability of the first mounting bracket 14 and the second mounting bracket 17 is improved, the first mounting bracket 14 and the second mounting bracket 17 can bear the force applied by the hub 6, and at the same time, the process cost of the first mounting bracket 14 and the second mounting bracket 17 is simplified, and the production efficiency of the first mounting bracket 14 and the second mounting bracket 17 can be improved.

As shown in fig. 2, in one possible embodiment, the front cross member 11 is a straight circular tube structure, the diameter of which may be 65mm, the left side member 12 and the right side member 13 are two-dimensional circular bent tube structures, and the left side member 12 and the right side member 13 may be bent in a direction away from each other by bending a straight tube, the diameters of which may be 55mm, and the left side member 12 and the right side member 13 are welded and fixed to the front cross member 11. The front cross member 11 has a large diameter, and the dynamic performance of the rear subframe 1 can be improved. The front cross beam 11, the left longitudinal beam 12 and the right longitudinal beam 13 are simple in structure, compared with common stamping welding and hydraulic forming, the working procedures of die development are reduced, the process cost of the rear auxiliary frame 1 is reduced, and meanwhile, the manufacturing period of the rear auxiliary frame 1 can be shortened.

As shown in fig. 2 and 5, in one possible embodiment, the rear subframe 1 further includes a rear cross member 15, the rear cross member 15 being located between the left side member 12 and the right side member 13, and both ends of the rear cross member 15 being connected to the left side member 12 and the right side member 13, respectively. The rear cross member 15 is disposed at a distance from the front cross member 11 along the longitudinal direction Y of the rear subframe 1. The rear cross member 15 includes a first body portion 151 and a second body portion 152, and the first body portion 151 and the second body portion 152 may have an L-shaped structure, wherein one sides of the first body portion 151 and the second body portion 152 are connected to each other, and the other sides are disposed at intervals, so that the rear cross member 15 has a U-shaped structure.

The rear cross beam 15 has a U-shaped structure, so that the weight of the rear cross beam 15 can be reduced, the weight of the rear auxiliary frame 1 can be further reduced, and the production cost of the rear auxiliary frame can be reduced. The first body 151 and the second body 152 are L-shaped, which can improve the strength of the first body 151 and the second body 152, reduce the possibility of deformation of the rear cross member 15, and facilitate the improvement of the load that the rear subframe 1 can withstand.

The first body portion 151 and the second body portion 152 may be formed into an L-shaped structure by a stamping process, and then the first body portion 151 and the second body portion 152 are welded to form the rear cross member 15, so that a processing process of the rear cross member 15 is simplified, and the production efficiency of the rear cross member 15 can be improved. The thickness of the plate used for punching the first body portion 151 and the second body portion 152 may be 2mm, and if the thickness of the plate is small, the strength of the rear cross member 15 is low, deformation is easy to occur, and if the thickness of the plate is large, the weight of the rear cross member 15 is large, and the production cost is high.

As shown in fig. 5, in one possible embodiment, one of the first body portion 151 and the second body portion 152 is provided with a male tang 151a, and the other is provided with a female tang 152a, and the male tang 151a extends into the female tang 152a when the first body portion 151 and the second body portion 152 are connected.

Taking the example that the first body portion 151 is provided with the male tang 151a and the second body portion 152 is provided with the female tang 152a, the male tang 151a protrudes from the first body portion 151 and extends in the direction of the second body portion 152, and the female tang 152a is recessed in the direction away from the first body portion 151. When the first body 151 and the second body 152 are connected, the first body 151 and the second body 152 are first assembled, the male spigot 151a is inserted into the female spigot 152a to determine the relative positions of the first body 151 and the second body 152, and then the first body 151 and the second body 152 are welded.

As shown in fig. 5, in one possible embodiment, the rear cross member 15 includes a plurality of weight-reducing holes 153, and the plurality of weight-reducing holes 153 are disposed at intervals between the first body portion 151 and the second body portion 152.

The first body portion 151 and the second body portion 152 are each provided with a weight-reducing hole 153 to reduce the weight of the rear cross member 15, which is advantageous in improving the effect of weight reduction of the rear subframe 1. When the rear cross beam 15 is deformed, the outer layer is subjected to tensile force, the inner layer is subjected to pressure, a neutral layer is arranged between the tensile force receiving part and the pressure receiving part, the neutral layer is not subjected to tensile force nor pressure, the weight reducing holes 153 are positioned near the neutral layer of the rear cross beam 15, and the influence of the weight reducing holes 153 on the strength and rigidity of the rear cross beam 15 can be reduced.

As shown in fig. 5, in one possible embodiment, the weight-reducing hole 153 includes a first weight-reducing hole 153a and a second weight-reducing hole 153b, the first weight-reducing hole 153a being located on two sidewalls of the first body portion 151 and the second body portion 152 apart from each other, and a flange being provided along a circumferential direction of the weight-reducing hole 153. The second weight-reducing hole 153b is located on both sidewalls of the first and second body parts 151 and 152 connected to each other, and is located at a weld of the first and second body parts 151 and 152.

When the side wall provided with the lightening hole 153 receives external acting force, the flanging can reduce the possibility of acting force concentration, so that the possibility of deformation of the lightening hole 153 is reduced, and the strength of the rear cross beam 15 is improved. The second weight reducing hole 153b can reduce the welding length of the first body 151 and the second body 152 while reducing the weight of the rear cross member 15, and thus can reduce the possibility that the first body 151 and/or the second body 152 will deform due to welding.

As shown in fig. 6, in one possible embodiment, a first connection portion 154 and a second connection portion 155 are respectively disposed at one side of the first body portion 151 and the second body portion 152 spaced apart from each other, the first connection portion 154 is located at a middle position of the first body portion 151, the second connection portion 155 is located at a middle position of the second body portion 152, the first connection portion 154 and the second connection portion 155 are bent in directions approaching each other, the first connection portion 154 and the second connection portion 155 are connected to each other after the first body portion 151 and the second body portion 152 are connected, the middle position of the rear cross member 15 is in a semi-closed structure, and the first connection portion 154 and the second connection portion 155 can support one side of the first connection portion 154 and the second connection portion 155 spaced apart from each other.

One end of the lower control arm assembly 4 is connected with the rear cross beam 15, the other end of the lower control arm assembly is connected with the hub 6, and the acting force born by the hub 6 can be transmitted to the rear cross beam 15 through the lower control arm assembly 4. The intermediate position of rear cross beam 15 is semi-closed structure, and first connecting portion 154 and second connecting portion 155 can support one side that first main part 151 and second main part 152 interval set up, have improved rear cross beam 15's stability, can reduce rear cross beam 15 and pass into the possibility of car with the vibration that hub 6 atress produced, are favorable to improving the NVH performance of vehicle.

As shown in fig. 7 and 8, in one possible embodiment, the rear subframe 1 further includes a plurality of mounting bushings 16, and the plurality of mounting bushings 16 are respectively mounted at both ends of the front cross member 11, at one end of the right side member 13 remote from the front cross member 11, and at one end of the left side member 12 remote from the front cross member 11. Compared with the bushing structure, the mounting sleeve 16 adopted in the embodiment of the application can be welded and fixed with the front cross beam 11, the left longitudinal beam 12 or the right longitudinal beam 13, has a simple structure, and can reduce the production cost of the rear auxiliary frame 1.

As shown in fig. 7, in one possible embodiment, the mounting sleeve 16 includes a body portion 161 and a mounting portion 162, the mounting portion 162 is located at one end of the body portion 161, and the cross-sectional area of the mounting portion 162 is greater than the cross-sectional area of the body portion 161. The body portion 161 is mounted in the rear sub-frame 1, and the mounting portion 162 protrudes from the rear sub-frame 1 for contact with the vehicle body.

The mounting portion 162 is used for being connected with the vehicle body, and the cross-sectional area of the mounting portion is larger than that of the body portion 161, so that the contact area between the mounting sleeve 16 and the vehicle body can be increased, after the rear subframe 1 is mounted on the vehicle body, the friction force between the mounting sleeve 16 and the vehicle body can be increased, and further the possibility of abnormal noise caused by relative sliding between the rear subframe 1 and the vehicle body is reduced.

As shown in fig. 7, in one possible embodiment, the mounting portion 162 is provided with a hobbing 163 on a side thereof remote from the body portion 161. After the rear subframe 1 is mounted on the vehicle body, the hobbing 163 can increase the friction between the mounting portion 162 and the vehicle body, and reduce the possibility of abnormal noise due to relative sliding between the rear subframe 1 and the vehicle body.

As shown in fig. 8, in one possible embodiment, positioning holes 18 are formed in the left longitudinal beam 12 and the right longitudinal beam 13, and when the rear subframe 1 is assembled, the positioning tool is matched with the positioning holes 18 to determine the position of the rear subframe 1, so that the positioning hole references of welding, detecting and assembling the rear subframe 1 are unified, the possibility of error accumulation of parts caused by welding, detecting and assembling reference changes is reduced, and the manufacturing and assembling precision of the rear subframe 1 is improved.

The battery pack of the new energy vehicle has larger weight, so that the axle load of the whole vehicle is larger, and the acting force required to be borne by the rear auxiliary frame 1 loaded on the new energy vehicle is larger.

The embodiment of the application provides a rear auxiliary frame 1 and a vehicle, wherein the rear auxiliary frame 1 comprises a front cross beam 11, a left longitudinal beam 12 and a right longitudinal beam 13, and the left longitudinal beam 12 and the right longitudinal beam 13 are arranged at intervals along the width direction X of the rear auxiliary frame 1 and are connected with the front cross beam 11. A first mounting bracket 14 is provided at a position where the left side member 12 is connected to the front cross member 11, and a first mounting bracket 14 is also provided at a position where the right side member 13 is connected to the front cross member 11, for mounting the cross arm 2. The first mounting bracket 14 includes a first connection piece 141, a second connection piece 142, and a reinforcing plate 143, the first connection piece 141 and the second connection piece 142 being connected to each other, the reinforcing plate 143 being located between the first connection piece 141 and the second connection piece 142 for supporting the first connection piece 141 and the second connection piece 142 to improve the strength of the first mounting bracket 14 and reduce the possibility of deformation of the first mounting bracket 14. The first connecting piece 141 in the first mounting bracket 14 is connected with the front cross beam 11, and the second connecting piece 142 is connected with the left longitudinal beam 12 or the right longitudinal beam 13, so that the possibility that the first mounting bracket 14 falls off is reduced, and the reliability of the rear auxiliary frame 1 is improved.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. A rear subframe, characterized in that the rear subframe (1) comprises:

a front cross member (11);

A left longitudinal beam (12) and a right longitudinal beam (13), wherein the left longitudinal beam (12) and the right longitudinal beam (13) are arranged at intervals along the width direction of the rear auxiliary frame (1) and are connected with the front cross beam (11);

The first mounting brackets (14) are respectively arranged at the connection position of the left longitudinal beam (12) and the front cross beam (11) and the connection position of the right longitudinal beam (13) and the front cross beam (11) and are used for mounting the cross arm (2);

Wherein, first installing support (14) include first connecting piece (141), second connection piece (142) and reinforcing plate (143), first connecting piece (141) with second connection piece (142) interconnect, reinforcing plate (143) are located between first connecting piece (141) and second connection piece (142), first connecting piece (141) with front cross beam (11) are connected, second connection piece (142) with left longeron (12) or right longeron (13) are connected.

2. The rear subframe according to claim 1, wherein the reinforcing plate (143) includes a concave portion (143 a) and a bent portion (143 b), the bent portion (143 b) being inclined in a width direction of the rear subframe (1), the concave portion (143 a) being located at the bent portion (143 b).

3. The rear subframe according to claim 1, characterized in that the first connecting tab (141) comprises a first extension (141 a), the first extension (141 a) extending in a direction away from the reinforcement plate (143) for connection with the front cross member (11);

the second connecting piece (142) comprises a second extension part (142 a), and the second extension part (142 a) extends along a direction away from the reinforcing plate (143) and is used for being connected with the left longitudinal beam (12) or the right longitudinal beam (13).

4. The rear subframe according to claim 1, wherein the rear subframe (1) further comprises a rear cross member (15), the rear cross member (15) being disposed at a distance from the front cross member (11) along the length direction of the rear subframe (1), and both ends of the rear cross member (15) being connected to the left side member (12) and the right side member (13), respectively;

The rear cross beam (15) comprises a first main body part (151) and a second main body part (152), the first main body part (151) and the second main body part (152) are of L-shaped structures, one side of the first main body part (151) is connected with one side of the second main body part (152), and the other side of the first main body part is arranged at intervals; one side of the first main body part (151) and the second main body part (152) which are arranged at intervals is respectively provided with a first connecting part (154) and a second connecting part (155), and the first connecting part (154) and the second connecting part (155) are mutually connected.

5. The rear subframe according to claim 4, wherein the rear cross member (15) includes a plurality of lightening holes (153), the plurality of lightening holes (153) being provided at intervals to the first main body portion (151) and the second main body portion (152).

6. The rear subframe according to claim 5, wherein the weight-reducing hole (153) includes a first weight-reducing hole (153 a) and a second weight-reducing hole (153 b), the first weight-reducing hole (153 a) being located at two side walls of the first body portion (151) and the second body portion (152) distant from each other, and a burring being provided along a circumferential direction of the first weight-reducing hole (153 a);

The second lightening hole (153 b) is located at a position where the first body part (151) and the second body part (152) are connected to each other.

7. The rear subframe according to claim 4, wherein one of the first and second main body portions (151, 152) is provided with a male spigot (151 a) and the other is provided with a female spigot (152 a), the male spigot (151 a) extending into the female spigot (152 a) after the first and second main body portions (151, 152) are connected.

8. The rear subframe according to claim 1, wherein the rear subframe (1) further comprises a plurality of mounting bushings (16), the plurality of mounting bushings (16) being mounted at both ends of the front cross member (11), at one end of the left side member (12) remote from the front cross member (11), and at one end of the right side member (13) remote from the front cross member (11), respectively.

9. The rear subframe according to claim 8, wherein the mounting sleeve (16) includes a body portion (161) and a mounting portion (162), the mounting portion (162) is mounted to one end of the body portion (161), and a cross-sectional area of the mounting portion (162) is larger than a cross-sectional area of the body portion (161);

a hobbing (163) is arranged on one side of the mounting part (162) away from the body part (161).

10. A vehicle characterized in that the vehicle comprises a rear subframe (1), a cross arm (2), an upper control arm (3), a lower control arm assembly (4), a trailing arm (5) and a hub (6), wherein the trailing arm (5) is mounted on the hub (6), the rear subframe (1) is connected with the hub (6) through the cross arm (2), the upper control arm (3) and the lower control arm assembly (4), and the rear subframe (1) is the rear subframe (1) according to any one of claims 1 to 9.