A rear subframe and automobile that are compatible with both SUVs and sedans

Abstract

The frame includes a front tube beam, a rear tube beam, a front suspension mount, and longitudinal beams. The two longitudinal beams are arranged in parallel, while the rear tube beam is spaced apart from the front tube beam and overlapped and fixed between the two longitudinal beams to form the main frame. The middle section of the front tube beam is an arched straight section, and the two front suspension mounts are symmetrically arranged on this arched straight section, in the opposite direction to the arch. The main frame can be used in both directions. This rear subframe structure can accommodate the different motor heights of SUV and Sedan models. Furthermore, although the rear subframe assembly uses different part numbers, all its sub-parts are interchangeable, eliminating the need for additional sub-parts and saving on mold development costs. Welding the front tube beam to the front mounting point sleeve (because the fit between these two parts differs by 180° between SUV and Sedan models) can be performed on the same welding fixture, saving on another welding fixture.

Description

Technical Field

[0001] This invention relates to the field of automotive suspension, specifically to a rear subframe and automobile that are universal for both SUVs and sedans. Background Technology

[0002] There are many types of rear subframes on the market. Some automakers use the same subframe for the sake of platform commonality. While this reduces development costs, it sacrifices overall vehicle performance (especially for SUVs and sedans, as different vehicle heights correspond to different wheel center coordinates). Because using the same subframe, while maintaining the overall stance of a sedan, directly replicating it to an SUV will inevitably sacrifice suspension wheel center travel, affecting overall vehicle performance. Summary of the Invention

[0003] The purpose of this invention is to provide a rear subframe and vehicle that are universal for both SUVs and sedans, in order to solve the problem that using the same subframe for both sedans and SUVs can lead to inconsistent suspension wheel travel, which affects the overall vehicle performance.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A rear subframe that is universal for both SUVs and sedans includes a front tube beam, a rear tube beam, a front suspension mount bracket, and two longitudinal beams; the two longitudinal beams are arranged in parallel between the rear tube beam and the front tube beam to form the main body of the frame; the middle part of the front tube beam is an arched straight section, and the two front suspension mount brackets are symmetrically arranged on the arched straight section, opposite to the direction of the arch; the main body of the frame can be used in both directions.

[0006] Furthermore, front mounting point sleeves are provided at both ends of the front tube beam and the rear tube beam, one end of the longitudinal beam is welded and fixed to the front tube beam, and the other end of the longitudinal beam is constructed with a rear mounting point sleeve, and a rear suspension bushing is installed inside the rear mounting point sleeve.

[0007] Furthermore, reinforcing lining plates are installed at the connection between the front tube beam and the longitudinal beam.

[0008] Furthermore, a lower guard plate fixing bracket and a rear tie rod bracket are installed below one of the longitudinal beams, and a rear control arm bracket is installed below the other longitudinal beam.

[0009] Furthermore, several water pipe fixing brackets are installed on the rear pipe beam.

[0010] Furthermore, a rear suspension bracket is installed on the rear tube beam.

[0011] Furthermore, a wire harness fixing bracket is installed on the front tube beam.

[0012] Furthermore, in SUV models, the straight section of the front tube beam arches upwards, with the suspension mounting bracket on it facing downwards, for motor mounting in SUV models.

[0013] Furthermore, in passenger car models, the front tube beam is rotated by °, with the middle arched straight section pointing downwards, and the suspension mounting bracket on it facing upwards, for motor mounting in passenger car models.

[0014] Further, a type of vehicle includes a rear subframe that is common to both SUVs and sedans.

[0015] Compared with the prior art, the present invention has the following technical effects:

[0016] The rear subframe disclosed in this invention, for SUV models, has an upward-facing, arched, straight section of the front tube beam with the mounting bracket on it facing downwards, ensuring the motor's spatial position in the SUV model; for sedan models, the front tube beam is rotated 180°, with the arched, straight section facing downwards and the mounting bracket on it facing upwards, ensuring the motor's spatial position in the sedan model. This rear subframe structure can accommodate the different motor height requirements of both SUV and sedan models, while also ensuring that all sub-parts of the rear subframe assembly are interchangeable despite different part numbers, eliminating the need for additional sub-parts and saving on mold development costs. When welding the front tube beam to the front mounting point sleeve (since the fit between these two parts differs by 180° between SUV and sedan models), it can be done on the same welding fixture, saving on another welding fixture. Finally, during assembly inspection, different height testing blocks can be installed on the fixture to check the position of the front mounting bracket, making the fixture interchangeable and further reducing costs. Attached Figure Description

[0017] Figure 1 This is an exterior view of a new type of subframe;

[0018] Figure 2 A front view of a new type of subframe;

[0019] Figure 3 A top view of a new type of subframe;

[0020] Figure 4 A left view of a new type of subframe;

[0021] Figure 5 This is an exterior view of a new type of subframe (rotated 180°);

[0022] in:

[0023] 1. Front tube beam, 2. Rear tube beam, 3. Longitudinal beam, 4. Front mounting point sleeve, 5. Rear control arm bracket, 6. Rear tie rod bracket, 7. Front suspension mounting bracket, 8. Rear suspension bushing, 9. Lower guard plate fixing bracket, 10. Water pipe fixing bracket, 11. Wiring harness fixing bracket, 12. Reinforcing liner, 13. Rear suspension bracket. Detailed Implementation

[0024] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] This invention is mainly aimed at SUV and Sedan models, based on a platform, which not only reflects the different overall stances of the two models, but also ensures the commonality of the rear subframe and reduces the number of molds to be developed.

[0028] This invention solves the problem of SUV and Sedan models on a platform basis. Although the rear subframes have two different part numbers, the sub-parts inside the subframe assembly are exactly the same. They only meet the mounting point requirements of different models through different mounting methods, which reduces the number of molds to be developed. At the same time, the welding fixtures and inspection tools can also be used interchangeably.

[0029] Please see Figures 1 to 5The present invention discloses a rear subframe that is universal for both SUVs and sedans, comprising a front tube beam 1, a rear tube beam 2, and two longitudinal beams 3 arranged universally on the left and right sides. The front tube beam 1 has front mounting point sleeves 4 at both ends, and a straight, arched section in the middle of the front tube beam 1 with two symmetrically arranged front suspension mounting brackets 7. One end of the longitudinal beam 3 is welded and fixed to the front tube beam 1, and a rear mounting point sleeve is constructed at the other end of the longitudinal beam 3, with a rear suspension bushing 8 installed inside the sleeve. The rear tube beam 2 is arranged at intervals with the front tube beam 1 and is overlapped and fixed between the two longitudinal beams 3. One end of the rear tube beam 2 is provided with a rear suspension bracket 13.

[0030] Example 1:

[0031] A rear subframe that is universal for both SUVs and sedans includes a front tube beam 1, a rear tube beam 2, a front suspension mounting bracket 7, and longitudinal beams 3. The two longitudinal beams 3 are arranged in parallel, and the rear tube beam 2 is arranged at intervals with the front tube beam 1 and is overlapped and fixed between the two longitudinal beams 3 to form the main body of the frame. The middle part of the front tube beam 1 is an arched straight section, and the two front suspension mounting brackets 7 are symmetrically arranged on the arched straight section, and in the opposite direction to the arch. The main body of the frame can be used in both directions.

[0032] For SUVs, the straight section of the front tube beam with its central arch facing upwards has its mounting bracket facing downwards to ensure adequate space for the motor. For sedans, the front tube beam is rotated 180°, with the straight section of its central arch facing downwards and the mounting bracket facing upwards to ensure adequate space for the motor.

[0033] Example 2:

[0034] A rear subframe that is universal for both SUVs and sedans includes a front tube beam 1, a rear tube beam 2, a front suspension mounting bracket 7, and longitudinal beams 3. The two longitudinal beams 3 are arranged in parallel, and the rear tube beam 2 is arranged at intervals with the front tube beam 1 and is overlapped and fixed between the two longitudinal beams 3 to form the main body of the frame. The middle part of the front tube beam 1 is an arched straight section, and the two front suspension mounting brackets 7 are symmetrically arranged on the arched straight section, and in the opposite direction to the arch. The main body of the frame can be used in both directions.

[0035] The front tube beam 1 and the rear tube beam 2 are respectively provided with front mounting point sleeves 4 at both ends. One end of the longitudinal beam 3 is welded and fixed to the front tube beam 1. The other end of the longitudinal beam 3 is constructed with a rear mounting point sleeve 14. The rear mounting point sleeve 14 is equipped with a rear suspension bushing 8.

[0036] In SUV models, the straight section of the front tube beam arches upwards, and the suspension mounting bracket 7 on it faces downwards, which is used for motor mounting in SUV models.

[0037] For passenger cars, the front tube beam is rotated 180°, with the middle arched straight section facing downwards, and the suspension mounting bracket 7 on it facing upwards, which is used for motor mounting in passenger cars.

[0038] This rear subframe structure can accommodate the varying motor height and position in both SUV and sedan models. Furthermore, while the rear subframe assembly uses different part numbers, all its sub-parts are interchangeable, eliminating the need for additional sub-parts and saving on mold development costs. When welding the front tube beam to the front mounting point sleeve (due to the 180° difference in fit between SUV and sedan models), the same welding fixture can be used, saving on another welding fixture. Finally, during assembly inspection, different height testing blocks can be installed on the fixture to check the positional accuracy of the front suspension mount, ensuring the fixture is also interchangeable.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rear subframe that is universal for both SUVs and sedans, characterized in that, It includes a front tube beam (1), a rear tube beam (2), a front suspension mounting bracket (7), and two longitudinal beams (3); the two longitudinal beams (3) are arranged in parallel between the rear tube beam (2) and the front tube beam (1) to form the main body of the frame; the middle part of the front tube beam (1) is an arched straight section, and the two front suspension mounting brackets (7) are symmetrically arranged on the arched straight section and opposite to the arching direction; the main body of the frame can be used from both sides; In the case of SUV models, the straight section of the front tube beam arches upwards, and the suspension mounting bracket (7) on it faces downwards, which is used for motor installation in SUV models; When the car model is used, the front tube beam is rotated 180°, the middle arched straight section is downward, and the suspension mounting bracket (7) on it is upward, which is used for the motor installation of the car model.

2. The rear subframe for both SUVs and sedans as described in claim 1, characterized in that, The front tube beam (1) and the rear tube beam (2) are respectively provided with front mounting point sleeves (4), one end of the longitudinal beam (3) is welded and fixed to the front tube beam (1), and the other end of the longitudinal beam (3) is constructed with a rear mounting point sleeve (14), and a rear suspension bushing (8) is installed inside the rear mounting point sleeve (14).

3. The rear subframe for both SUVs and sedans as described in claim 1, characterized in that, A reinforcing liner (12) is provided at the connection between the front tube beam (1) and the longitudinal beam (3).

4. A rear subframe for both SUVs and sedans as described in claim 1, characterized in that, A lower guard plate fixing bracket (9) and a rear tie rod bracket (6) are provided below one of the longitudinal beams (3), and a rear control arm bracket (5) is provided below the other longitudinal beam (3).

5. A rear subframe for both SUVs and sedans as described in claim 1, characterized in that, Several water pipe fixing brackets (10) are installed on the rear pipe beam (2).

6. A rear subframe for both SUVs and sedans as described in claim 1, characterized in that, A rear suspension bracket (13) is installed on the rear tube beam (2).

7. A rear subframe suitable for both SUVs and sedans according to claim 1, characterized in that, A wire harness fixing bracket (11) is installed on the front tube beam (1).

8. A car, characterized in that, Includes a rear subframe for SUVs and sedans as described in any one of claims 1 to 7.

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