Rear auxiliary frame assembly structure

Abstract

The utility model relates to the technical field of automobile manufacturing, in particular to a rear auxiliary frame assembly structure which comprises a front cross beam (1). Longitudinal beams (2) are arranged on the two sides of the front cross beam (1) respectively. A rear cross beam (3) is arranged between the adjacent longitudinal beams (2); a first RDU mounting structure is arranged on the front cross beam (1); a second RDU mounting structure is arranged on the rear cross beam (3); the rear auxiliary frame is constructed into an integral frame through a front cross beam, a rear cross beam and a longitudinal beam; the RDU is arranged at the bottom of a frame of the rear auxiliary frame, and the two ends of the RDU are connected with a first RDU installation structure arranged on the front cross beam and a second RDU installation structure arranged on the rear cross beam respectively. According to the rear auxiliary frame, the strength and rigidity requirements of the overall structure can be met, and reasonable layout of the RDU can be achieved; and stable connection of the RDU on the rear auxiliary frame is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile manufacturing, and more specifically, to a rear subframe assembly structure. Background Art

[0002] The rear subframe is an important part of the vehicle chassis, and the suspension system is fixed to the vehicle body through the rear subframe; since the rear subframe can bring good suspension connection stiffness, reduce the vibration transmitted from the road surface, and bring good comfort, during driving, the loads generated by road conditions such as acceleration, braking, climbing, and steering will all be transmitted to the rear subframe. Therefore, the rear subframe must have sufficient strength and durability to be able to work stably within the service life cycle of the whole vehicle and ensure driving safety; RDU refers to the rear-wheel power automatic distribution system, also known as the torque vectoring distribution system. When the left rear wheel slips, the system will transmit the power of the left rear wheel to the right rear wheel; similarly, when the right rear wheel slips, the system will transmit the power of the right rear wheel to the left rear wheel.

[0003] The existing rear subframes generally adopt a steel frame structure, which is mainly composed of a front cross beam, a rear cross beam, a left longitudinal beam, a right longitudinal beam and related mounting brackets welded together; however, most of the existing vehicles are front-wheel drive vehicles, and the middle space of the rear subframe is relatively small, which cannot meet the layout requirements of the mechanical four-wheel drive RDU.

[0004] After retrieval, the applicant found that a Chinese patent document with the publication number of 204161489U disclosed an automobile rear frame on February 18, 2015. The automobile rear frame includes: a first rear wheel arch pillar, a coat rack cross beam, a second rear wheel arch pillar and a rear floor cross beam. The first rear wheel arch pillar, the coat rack cross beam, the second rear wheel arch pillar and the rear floor cross beam are connected end to end in sequence to form a closed loop structure. The coat rack cross beam and the rear floor cross beam are parallel to the rear floor of the automobile; a first rear wheel arch and a second rear wheel arch. The first rear wheel arch is connected to the first rear wheel arch pillar, and the second rear wheel arch is connected to the second rear wheel arch pillar. Both the first rear wheel arch and the second rear wheel arch are arranged outside the closed loop structure; this structure also cannot solve the above technical problems.

[0005] Therefore, in order to improve or solve at least one of the above problems, it is necessary to optimize the existing automobile rear subframe structure. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a rear subframe assembly structure that can realize the stable installation of the mechanical four-wheel drive RDU.

[0007] To solve the above technical problems, the technical solution adopted by the present utility model is as follows: A rear subframe assembly structure includes a front cross member; longitudinal beams are respectively provided on both sides of the front cross member; a rear cross member is provided between adjacent longitudinal beams; a first RDU mounting structure is provided on the front cross member; a second RDU mounting structure is provided on the rear cross member.

[0008] The first RDU mounting structure includes a first RDU mounting sleeve and a second RDU mounting sleeve; both the first RDU mounting sleeve and the second RDU mounting sleeve are provided on the side of the front cross member away from the rear cross member.

[0009] The second RDU mounting structure includes a third RDU mounting sleeve; the third RDU mounting sleeve is provided on the rear cross member.

[0010] The rear cross member includes a first cross member baffle and a second cross member baffle; the third RDU mounting sleeve is provided between the first cross member baffle and the second cross member baffle and is provided in the middle of the rear cross member.

[0011] The rear cross member includes a lower control arm mounting plate; both sides of the lower control arm mounting plate are respectively connected to the tops of the first cross member baffle and the second cross member baffle; lower control arm mounting holes are provided on the lower control arm mounting plate.

[0012] An upper control arm mounting bracket is provided on the longitudinal beam; the upper control arm mounting bracket is provided on the side of the longitudinal beam close to the front cross member and is connected to the top of the longitudinal beam.

[0013] The upper control arm mounting bracket includes an upper control arm mounting top plate; upper control arm left brackets and upper control arm right brackets are respectively provided on both sides of the upper control arm mounting top plate;

[0014] The upper control arm left bracket is respectively connected to the longitudinal beam and the front cross member; the upper control arm right bracket is connected to the longitudinal beam.

[0015] A lower link mounting bracket is provided on the longitudinal beam; the lower link mounting bracket is provided at the bottom of the upper control arm mounting bracket.

[0016] The lower link mounting bracket includes a lower link left mounting plate and a lower link right mounting plate; a lower link mounting reinforcement plate is provided between the lower link left mounting plate and the lower link right mounting plate; the lower link left mounting plate is respectively connected to the longitudinal beam and the front cross member; the lower link right mounting plate is connected to the bottom of the longitudinal beam;

[0017] A boss and a lower link mounting hole are provided on one side of the lower link right mounting plate; a convex block is provided on the boss.

[0018] Both ends of the front cross member are provided with mounting bushings; the ends of the longitudinal beams away from the front cross member are provided with the mounting bushings; the rear cross member is provided with weight-reducing holes.

[0019] The beneficial effects of this application are as follows:

[0020] 1. The rear subframe of this application is built with a framework composed of a front cross member, a rear cross member, and left and right longitudinal beams, and the structure design is completed at other positions according to the definition and layout requirements of the suspension hard points; in order to save layout space, the front cross member and the left and right longitudinal beams adopt a hydraulic pipe structure design. Since the rear cross member needs to meet the assembly conditions of the RDU, the installation of the lower control arm, the adjustment of the four-wheel alignment, and the space requirements, the rear cross member is formed by welding two stamping parts together; the RDU is placed at the bottom of the framework of this rear subframe, and both ends are respectively connected to the first RDU installation sleeve and the second RDU installation sleeve provided on the front cross member and the third RDU installation sleeve provided on the rear cross member through bushings; this rear subframe is connected to the vehicle body through the mounting bushings provided at both ends of the front cross member and the ends of the left and right longitudinal beams; thus, this rear subframe can ensure the strength and stiffness requirements of the overall structure, and can realize the reasonable layout of the RDU; realize the stable connection of the RDU on this rear subframe.

[0021] 2. This device is provided with lower control arm mounting holes on the lower control arm mounting plate of the rear cross member; lower control arm mounting holes and bosses are respectively provided on the right lower control arm mounting plate of the lower link mounting bracket; two convex blocks are provided on the boss; both the lower control arm mounting holes and the lower link mounting holes are waist-shaped holes; the lower control arm and the lower link are respectively connected to the lower control arm mounting holes and the lower link mounting holes using eccentric bolts; at this time, by adjusting the position of the eccentric bolts, the four-wheel alignment operation can be realized. Description of the Drawings

[0022] The following further details the specific implementation manners of the present utility model in conjunction with the drawings, where:

[0023] Figure 1 is the top view of the structure of this rear subframe assembly.

[0024] Figure 2 is the bottom view of the structure of this rear subframe assembly.

[0025] Figure 3 is the axonometric view of the structure of this rear subframe assembly.

[0026] The markings in the above figures are all:

[0027] The markings in the figure are:

[0028] 1. Front cross member, 101. Mounting bushing,

[0029] 2. Longitudinal beam,

[0030] 3. Rear crossbeam, 301. First crossbeam baffle, 302. Second crossbeam baffle, 303. Lower swing arm mounting plate, 304. Weight reduction hole

[0031] 4. First RDU mounting sleeve, 401. Second RDU mounting sleeve

[0032] 5. Third RDU mounting sleeve

[0033] 6. Lower swing arm mounting hole

[0034] 7. Upper swing arm mounting bracket, 701. Left upper swing arm bracket, 702. Right upper swing arm bracket, 703. Upper swing arm mounting top plate

[0035] 8. Lower tie rod mounting bracket, 801. Left lower tie rod mounting plate, 802. Right lower tie rod mounting plate, 803. Lower tie rod mounting reinforcement plate, 804. Boss, 805. Protrusion, 806. Lower tie rod mounting hole Detailed implementation mode

[0036] The following is a further detailed description of the specific implementation mode of the present utility model by describing the embodiments with reference to the attached drawings, aiming to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present utility model, and contribute to its implementation.

[0037] Figure 1 The structure of the rear subframe assembly shown includes a front crossbeam 1; longitudinal beams 2 are respectively arranged on both sides of the front crossbeam 1; a rear crossbeam 3 is arranged between adjacent longitudinal beams 2; a first RDU mounting structure is arranged on the front crossbeam 1; a second RDU mounting structure is arranged on the rear crossbeam 3.

[0038] The rear subframe is built into an overall framework through the front crossbeam 1, the rear crossbeam 3 and the longitudinal beams 2; the RDU is placed at the bottom of the framework of the rear subframe, and both ends are respectively connected to the first RDU mounting structure arranged on the front crossbeam 1 and the second RDU mounting structure arranged on the rear crossbeam 3; thus, the rear subframe can ensure the strength and stiffness requirements of the overall structure, and can realize the reasonable layout of the RDU; realize the stable connection of the RDU on the rear subframe.

[0039] The first RDU mounting structure includes a first RDU mounting sleeve 4 and a second RDU mounting sleeve 401; both the first RDU mounting sleeve 4 and the second RDU mounting sleeve 401 are arranged on the side of the front crossbeam 1 away from the rear crossbeam 3.

[0040] The first RDU mounting sleeve 4 and the second RDU mounting sleeve 401 are both of circular tube structure; the first RDU mounting sleeve 4 and the second RDU mounting sleeve 401 are symmetrically arranged on the side surface of the front cross member 1, used for press-fitting bushings, providing mounting positions for the front part of the RDU, enabling the RDU to be stably connected to the front cross member 1 of the rear subframe, and capable of reducing vehicle body vibration.

[0041] The second RDU mounting structure includes a third RDU mounting sleeve 5; the third RDU mounting sleeve 5 is arranged on the rear cross member 3.

[0042] The third RDU mounting sleeve 5 is of circular tube structure; the third RDU mounting sleeve 5 is arranged in the middle of the side surface of the rear cross member 3, used for press-fitting bushings, providing mounting positions for the rear part of the RDU, enabling the RDU to be stably connected to the rear cross member 3 of the rear subframe, and capable of reducing vehicle body vibration.

[0043] The rear cross member 3 includes a first cross member baffle 301 and a second cross member baffle 302; the third RDU mounting sleeve 5 is arranged between the first cross member baffle 301 and the second cross member baffle 302, and is arranged in the middle of the rear cross member 3.

[0044] The first RDU mounting sleeve 4 and the second RDU mounting sleeve 401 are symmetrically arranged on the front cross member 1; both the first cross member baffle 301 and the second cross member baffle 302 are of U-shaped structure; the two ends of the first cross member baffle 301 and the second cross member baffle 302 are respectively connected to the longitudinal beam 2; the two ends of the mounting sleeve 5 are respectively fixedly connected to the first cross member baffle 301 and the second cross member baffle 302; and the open end of the mounting sleeve 5 is arranged on the first cross member baffle 301.

[0045] The rear cross member 3 includes a lower swing arm mounting plate 303; the two sides of the lower swing arm mounting plate 303 are respectively connected to the tops of the first cross member baffle 301 and the second cross member baffle 302; the lower swing arm mounting plate 303 is provided with a lower swing arm mounting hole 6.

[0046] The lower swing arm mounting plate 303 is arranged on the top of the rear cross member 3, and the two sides are respectively fixedly connected to the first cross member baffle 301 and the second cross member baffle 302; the two ends of the lower swing arm mounting plate 303 are respectively fixedly connected to the longitudinal beam 2; two lower swing arm mounting holes 6 are symmetrically arranged on the lower swing arm mounting plate 303; the lower swing arm mounting plate 303 can provide mounting positions and stable supports for the lower swing arm; and can realize the fixed connection of the lower swing arm on this rear subframe.

[0047] The longitudinal beam 2 is provided with an upper swing arm mounting bracket 7; the upper swing arm mounting bracket 7 is arranged on the side of the longitudinal beam 2 close to the front cross member 1, and is arranged at the top of the longitudinal beam 2.

[0048] The upper swing arm mounting bracket 7 can provide mounting positions and stable supports for the upper swing arm; and can realize the fixed connection of the upper swing arm on this rear subframe.

[0049] The upper swing arm mounting bracket 7 includes an upper swing arm mounting top plate 703; on both sides of the upper swing arm mounting top plate 703, there are respectively an upper swing arm left bracket 701 and an upper swing arm right bracket 702;

[0050] The upper swing arm left bracket 701 is respectively connected to the longitudinal beam 2 and the front cross beam 1; the upper swing arm right bracket 702 is connected to the longitudinal beam 2.

[0051] The upper swing arm mounting top plate 703 is a square plate; the upper swing arm left bracket 701, the upper swing arm right bracket 702 and the upper swing arm mounting top plate 703 form a U-shaped structural bracket; the upper swing arm left bracket 701, the upper swing arm right bracket 702 and the upper swing arm mounting top plate 703 can achieve the stable connection of the upper swing arm and can achieve the stable support of the upper swing arm.

[0052] On the longitudinal beam 2, there is a lower pull rod mounting bracket 8; the lower pull rod mounting bracket 8 is arranged at the bottom of the upper swing arm mounting bracket 7.

[0053] The lower pull rod mounting bracket 8 is fixedly connected to the bottom of the longitudinal beam 2 and is arranged at the bottom of the upper swing arm mounting bracket 7; the lower pull rod mounting bracket 8 can provide an installation position for the lower pull rod and can achieve the stable connection of the lower pull rod on the rear subframe.

[0054] The lower pull rod mounting bracket 8 includes a lower pull rod left mounting plate 801 and a lower pull rod right mounting plate 802; between the lower pull rod left mounting plate 801 and the lower pull rod right mounting plate 802, there is a lower pull rod mounting reinforcement plate 803; the lower pull rod left mounting plate 801 is respectively connected to the longitudinal beam 2 and the front cross beam 1; the lower pull rod right mounting plate 802 is connected to the bottom of the longitudinal beam 2;

[0055] On one side of the lower pull rod right mounting plate 802, there are a boss 804 and a lower pull rod mounting hole 806; on the boss 804, there is a convex block 805.

[0056] The lower pull rod left mounting plate 801, the lower pull rod right mounting plate 802 and the lower pull rod mounting reinforcement plate 803 arranged between them can achieve the stable installation of the lower pull rod; the lower pull rod is connected with an eccentric bolt; the eccentric bolt is installed in the lower pull rod mounting hole 806; the lower pull rod mounting hole 806 is an oblong hole; the eccentric bolt can adjust its position in the lower pull rod mounting hole 806; the convex block 805 on the boss 804 can limit the eccentric flange surface of the eccentric bolt.

[0057] At both ends of the front cross beam 1, there are mounting bushings 101; at one end of the longitudinal beam 2 far from the front cross beam 1, there is a mounting bushing 101; the rear cross beam 3 is provided with a weight reduction hole 304.

[0058] The rear subframe is connected to the vehicle body through mounting bushings 101 provided at both ends of the front cross member 1 and the ends of the left and right longitudinal beams 2; thus, the rear subframe can be stably connected to the vehicle body; thus, the rear subframe can ensure the strength and stiffness requirements of the overall structure and can achieve a reasonable layout of the RDU; and the stable connection of the RDU on the rear subframe can be achieved.

[0059] The specific working process of the present utility model is as follows:

[0060] Place the RDU at the bottom of the rear subframe, connect the front end of the RDU to the front cross member 1 through the first RDU mounting sleeve 4 and the second RDU mounting sleeve 401; connect the rear end of the RDU to the rear cross member 3 through the third RDU mounting sleeve 5; mount the lower control arm on the lower control arm mounting plate 303; mount the upper control arm on the upper control arm mounting bracket 7; mount the trailing arm on the trailing arm mounting bracket 8; and mount the rear subframe on the vehicle body through the mounting bushings 101.

[0061] The present utility model has been described exemplarily in conjunction with the accompanying drawings. Obviously, the specific implementation of the present utility model is not limited by the above methods. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present utility model; or without improvement, the above concept and technical solution of the present utility model are directly applied to other occasions, they are all within the protection scope of the present utility model.

Claims

1. A rear subframe assembly structure, characterized in that: It includes a front crossbeam (1); longitudinal beams (2) are respectively arranged on both sides of the front crossbeam (1); a rear crossbeam (3) is arranged between adjacent longitudinal beams (2); a first RDU mounting structure is arranged on the front crossbeam (1); a second RDU mounting structure is arranged on the rear crossbeam (3).

2. The structure of a rear subframe assembly according to claim 1, characterized in that: The first RDU mounting structure includes a first RDU mounting sleeve (4) and a second RDU mounting sleeve (401); both the first RDU mounting sleeve (4) and the second RDU mounting sleeve (401) are arranged on the side of the front crossbeam (1) away from the rear crossbeam (3).

3. A rear subframe assembly structure according to claim 2, characterized in that: The second RDU mounting structure includes a third RDU mounting sleeve (5); the third RDU mounting sleeve (5) is arranged on the rear crossbeam (3).

4. A rear subframe assembly structure according to claim 3, characterized in that: The rear crossbeam (3) includes a first crossbeam baffle (301) and a second crossbeam baffle (302); the third RDU mounting sleeve (5) is arranged between the first crossbeam baffle (301) and the second crossbeam baffle (302), and is arranged in the middle of the rear crossbeam (3).

5. A rear subframe assembly structure according to claim 4, characterized in that: The rear crossbeam (3) includes a lower swing arm mounting plate (303); both sides of the lower swing arm mounting plate (303) are respectively connected to the tops of the first crossbeam baffle (301) and the second crossbeam baffle (302); a lower swing arm mounting hole (6) is arranged on the lower swing arm mounting plate (303).

6. A rear subframe assembly structure according to any one of claims 2-5, characterized in that: An upper swing arm mounting bracket (7) is arranged on the longitudinal beam (2); the upper swing arm mounting bracket (7) is arranged on the side of the longitudinal beam (2) close to the front crossbeam (1), and is arranged at the top of the longitudinal beam (2).

7. A rear subframe assembly structure according to claim 6, characterized in that: The upper swing arm mounting bracket (7) includes an upper swing arm mounting top plate (703); an upper swing arm left bracket (701) and an upper swing arm right bracket (702) are respectively arranged on both sides of the upper swing arm mounting top plate (703). The upper swing arm left bracket (701) is respectively connected to the longitudinal beam (2) and the front crossbeam (1); the upper swing arm right bracket (702) is connected to the longitudinal beam (2).

8. A rear subframe assembly structure according to claim 7, characterized in that: A lower pull rod mounting bracket (8) is arranged on the longitudinal beam (2); the lower pull rod mounting bracket (8) is arranged at the bottom of the upper swing arm mounting bracket (7).

9. A rear subframe assembly structure according to claim 8, characterized in that: The lower pull rod mounting bracket (8) includes a lower pull rod left mounting plate (801) and a lower pull rod right mounting plate (802); a lower pull rod mounting reinforcing plate (803) is arranged between the lower pull rod left mounting plate (801) and the lower pull rod right mounting plate (802); the lower pull rod left mounting plate (801) is respectively connected to the longitudinal beam (2) and the front crossbeam (1); the lower pull rod right mounting plate (802) is connected to the bottom of the longitudinal beam (2). A boss (804) and a lower pull rod mounting hole (806) are arranged on one side of the lower pull rod right mounting plate (802); a bump (805) is arranged on the boss (804).

10. A structure of a rear subframe assembly according to any one of claims 7 to 9, characterized in that: Mounting bushings (101) are arranged at both ends of the front crossbeam (1); the mounting bushings (101) are arranged at one end of the longitudinal beam (2) away from the front crossbeam (1); the rear crossbeam (3) is provided with a weight reduction hole (304).

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