A front subframe assembly for a non-load bearing vehicle

Abstract

The application discloses a front subframe assembly of a non-load-bearing vehicle and relates to the technical field of vehicles.The subframe is integrally arranged by a bottom structure and two groups of side wall structures.The subframe is symmetrically structured in the XZ plane direction and the YZ plane direction.A plurality of vertical ribs arranged in a matrix form are arranged on the two groups of side wall structures.A plurality of side wall mounting holes with bosses are formed in the vertical ribs.The two groups of side wall structures are attached to the inner sides of the frame longitudinal beams and are fixed to the frame longitudinal beams through the side wall mounting holes by bolts.In assembly, the subframe is selected as the positioning reference of the front end chassis.The frame longitudinal beams are provided with mounting holes, which are arranged in the same way as the side wall mounting holes on the side wall structures of the subframe.Thus, the machining error of the frame longitudinal beams can be corrected, so that the installation precision is ensured.The overall structure of the subframe is arranged on the inner sides of the frame longitudinal beams, so that the outer contour size of the subframe is reduced compared with the subframe of the prior art.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and more specifically to a front subframe assembly for a non-load-bearing vehicle. Background Technology

[0002] The front subframe, as an important load-bearing component of the front axle of a car, connects to the vehicle body above and bears the load of the front axle, and connects to the suspension and wheels below, and fixes the steering gear; its geometry, precision and strength have a great impact on the safety, reliability and overall performance of the vehicle.

[0003] Please refer to the accompanying drawings in the instruction manual. Figure 1 Passenger vehicles generally have a monocoque body with a subframe fixed to the bottom of the body; commercial vehicles have a non-monocoque body with the frame fixed on top and the subframe fixed to the bottom and sides of the frame.

[0004] Most existing subframes are made of stamped and welded parts, which require many molds and are costly. Furthermore, stamped and welded parts have limited load-bearing capacity and are not suitable for commercial vehicles with large load capacities.

[0005] The subframe of a commercial vehicle is fixed to the outside of the chassis, occupying space on the outside of the chassis. This is not conducive to the installation of components such as the body and shock absorbers. At the same time, the precision of the subframe depends on the precision of the chassis, making it difficult to improve the precision and performance of the suspension. Summary of the Invention

[0006] The purpose of this invention is to provide a front subframe assembly for a non-load-bearing vehicle, solving the following technical problems:

[0007] The subframe of a commercial vehicle is fixed to the outside of the chassis, occupying space on the outside of the chassis. This is not conducive to the installation of components such as the body and shock absorbers. At the same time, the precision of the subframe depends on the precision of the chassis, making it difficult to improve the precision and performance of the suspension.

[0008] The objective of this invention can be achieved through the following technical solutions:

[0009] A front subframe assembly for a non-load-bearing vehicle, wherein the subframe is integrally formed by a bottom structure and two sets of side wall structures; the subframe is symmetrical in the XZ plane and the YZ plane.

[0010] Both sets of sidewall structures are provided with several sets of vertical ribs arranged in a matrix. Several sidewall mounting holes with protrusions are opened on the vertical ribs. The two sets of sidewall structures are attached to the inner side of the frame longitudinal beam and are fixed to the frame longitudinal beam with bolts through the sidewall mounting holes.

[0011] Preferably, the subframe has a closed "U" shape in the X-axis direction and a "Z" shape in the Y-axis direction.

[0012] Preferably, in the X-axis direction, the two ends of the subframe are arranged with crossbeams facing each other to transmit the lateral force on the vehicle in the Y-axis direction.

[0013] Preferably, the bottom structure of the subframe is further provided with several sets of bottom mounting holes with bosses for fixing the steering gear and chassis component structures.

[0014] Preferably, the bottom mounting holes of each group are provided with staggered reinforcing ribs.

[0015] Preferably, the bottom structure is further provided with several sets of weight-reducing holes.

[0016] Preferably, in the X-axis direction, the bottom structure of the subframe has raised feet arranged on both sides opposite to each other.

[0017] Preferably, the support leg has two support leg mounting holes symmetrically formed along the XZ plane, and the support leg mounting holes extend upward and outward along the YZ cross-sectional direction. The support leg mounting holes are used to fix the swing arm bushing of the suspension.

[0018] Preferably, the side wall structure of the subframe is further provided with two sets of symmetrical boss mounting holes along the XZ plane for fixing the inner bushing of the suspension arm.

[0019] The beneficial effects of this invention are:

[0020] (1) The subframe in this invention is integrally formed and supplemented with crossbeams to improve the overall rigidity of the subframe and improve the NVH performance of the whole vehicle; the subframe is integrally processed and the upper and lower control arms of the suspension are directly fixed on the central frame to ensure the accuracy of the suspension, reduce the changes in wheel alignment parameters, and help ensure the performance of the whole vehicle; the processing process is simplified, the processing molds and fixtures are simplified, and the processing energy consumption and pollution are reduced.

[0021] (2) In the assembly of this invention, the subframe is selected as the positioning reference of the front chassis. The longitudinal beam of the frame has mounting holes, which are arranged in the same way as the side wall mounting holes on the side wall structure of the subframe. This can correct the processing error of the longitudinal beam of the frame, thereby ensuring the installation accuracy. The overall structure of the subframe is set inside the longitudinal beam of the frame, which makes the outer dimensions of the subframe smaller than those of the subframe in the prior art, thereby reducing the overall size and weight of the subframe and improving the rigidity of the subframe. Attached Figure Description

[0022] The invention will now be further described with reference to the accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the structure in the prior art;

[0024] Figure 2This is a structural schematic diagram of the front subframe assembly of a non-load-bearing vehicle according to the present invention;

[0025] Figure 3 This is a schematic diagram of the X-axis structure of the front subframe assembly of a non-load-bearing vehicle according to the present invention;

[0026] Figure 4 This is a schematic diagram of the Y-axis structure of the front subframe assembly of a non-load-bearing vehicle according to the present invention;

[0027] Figure 5 This is a top view of the front subframe assembly of a non-load-bearing vehicle according to the present invention;

[0028] Figure 6 This is a schematic diagram of the support legs in the front subframe assembly of a non-load-bearing vehicle according to the present invention.

[0029] In the diagram: 1. Bottom structure; 2. Side wall structure; 3. Horizontal beam; 4. Support leg; 11. Bottom mounting hole; 21. Vertical rib; 22. Side wall mounting hole; 41. Support leg mounting hole; 42. Boss mounting hole; 401. Support leg mounting plane; 402. Support leg mounting hole. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0031] Example 1

[0032] Please see Figures 1-2 As shown, the present invention is a front subframe assembly for a non-load-bearing vehicle. The subframe is integrally formed from a bottom structure 1 and two sets of side wall structures 2. In one embodiment, the bottom structure 1 and the side wall structures 2 are formed by casting or stamping. (See the accompanying drawings for reference.) Figure 2 Taking the coordinate axes as an example, the subframe has a symmetrical structure in the XZ plane and the YZ plane; specifically, in the X-axis direction, the subframe has a closed "U"-shaped structure, and in the Y-axis direction, the subframe has a "Z"-shaped structure.

[0033] Both sets of side wall structures 2 are provided with several sets of vertical ribs 21 arranged in a matrix. Several side wall mounting holes 22 with protrusions are opened on the vertical ribs 21. The two sets of side wall structures 2 are attached to the inner side of the frame longitudinal beam and are fixed to the frame longitudinal beam with bolts through the side wall mounting holes 22. During assembly, the subframe is selected as the positioning reference of the front chassis. The frame longitudinal beam has mounting holes, which are arranged in the same way as the side wall mounting holes 22 on the side wall structure 2 of the subframe. This can correct the processing error of the frame longitudinal beam, thereby ensuring the installation accuracy.

[0034] In this embodiment, the subframe integral structure is located inside the longitudinal beam of the frame, which reduces the outer dimensions of the subframe compared to the subframe of the prior art, thereby reducing the overall size and weight of the subframe and improving the rigidity of the subframe.

[0035] Example 2

[0036] Based on Example 1, please refer to Figures 3-4 In the X-axis direction, crossbeams 3 are arranged opposite each other at both ends of the subframe to transmit the lateral force on the vehicle in the Y-axis direction, thereby improving the overall rigidity and strength of the subframe.

[0037] In this embodiment, the bottom structure 1 of the subframe is also provided with several sets of bottom mounting holes 11 with bosses for fixing the steering gear and chassis component structures.

[0038] Specifically, each set of bottom mounting holes 11 is provided with staggered reinforcing ribs; among them, the bottom structure 1 is also provided with reinforcing ribs along the YZ direction to ensure the rigidity and strength of the subframe.

[0039] Several sets of weight-reduction holes are also provided on the bottom structure 1 to reduce the overall weight of the subframe and further improve its rigidity;

[0040] Please see Figures 5-6 As a further embodiment, in the X-axis direction, the bottom structure 1 of the subframe has raised feet 4 arranged on both sides opposite to each other.

[0041] Furthermore, the support 4 has two support mounting holes 41 symmetrically provided along the XZ plane. The support mounting holes 41 extend upward and outward along the YZ section direction. The support mounting holes 41 are used to fix the swing arm bushing of the suspension.

[0042] The side wall structure 2 of the subframe is also provided with two sets of boss mounting holes 42 symmetrical along the XZ plane to fix the inner bushing of the suspension arm.

[0043] Specifically, in this embodiment, each mounting hole is integrally machined on the subframe, eliminating the need for welding or assembly, thus further eliminating or reducing the machining and assembly errors that occur after stamping, welding, and assembly in the prior art; the front suspension is mounted on the support mounting hole 41 and the boss mounting hole 42, and the steering gear is mounted on the bottom mounting hole 11; assembly is performed on this high-precision reference, thereby ensuring the overall installation accuracy of the front end of the vehicle.

[0044] Example 3

[0045] Based on embodiment 1, the crossbeam 3 can also be installed on the outside of the side wall structure 2 of the subframe or inside the longitudinal beam of the frame;

[0046] In addition, the two sets of support legs 4 can also be set as independent structures separate from the subframe. The separated support legs 4 are provided with support leg mounting planes 401 and support leg mounting holes 402, which are installed with the bottom structure 1 of the subframe by bolts.

[0047] In the description of this invention, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on the invention. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "multiple" means two or more.

[0048] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., 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 communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0049] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A front subframe assembly for a non-load-bearing vehicle, wherein the subframe is integrally formed by a bottom structure (1) and two sets of side wall structures (2); characterized in that, The subframe has a symmetrical structure in both the XZ and YZ plane directions; Both sets of side wall structures (2) are provided with several sets of vertical ribs (21) arranged in a matrix. Several side wall mounting holes (22) with protrusions are opened on the vertical ribs (21). The two sets of side wall structures (2) are attached to the inner side of the frame longitudinal beam and are fixed to the frame longitudinal beam with bolts through the side wall mounting holes (22). Several sets of bottom mounting holes (11) with protrusions are also opened on the bottom structure (1) of the subframe for fixing the steering gear and chassis component structure. In the X-axis direction, the bottom structure (1) of the subframe has protruding feet (4) arranged on both sides below it. The support (4) has two support mounting holes (41) symmetrically opened along the XZ plane. The support mounting holes (41) extend upward and outward along the YZ section direction. The support mounting holes (41) are used to fix the swing arm bushing of the suspension. During assembly, the subframe is selected as the positioning reference of the front chassis. The longitudinal beam of the frame has mounting holes, which are arranged in the same way as the side wall mounting holes (22) on the side wall structure (2) of the subframe.

2. The front subframe assembly of a non-load-bearing vehicle according to claim 1, characterized in that, In the X-axis direction, the subframe has a closed "U"-shaped structure, and in the Y-axis direction, the subframe has a "Z"-shaped structure.

3. The front subframe assembly of a non-load-bearing vehicle according to claim 1, characterized in that, In the X-axis direction, the two ends of the subframe are arranged with crossbeams (3) to transmit the lateral force on the vehicle in the Y-axis direction.

4. The front subframe assembly of a non-load-bearing vehicle according to claim 1, characterized in that, Each group of bottom mounting holes (11) is provided with staggered reinforcing ribs.

5. The front subframe assembly of a non-load-bearing vehicle according to claim 1, characterized in that, The bottom structure (1) is also provided with several sets of weight reduction holes.

6. The front subframe assembly of a non-load-bearing vehicle according to claim 1, characterized in that, The side wall structure (2) of the subframe is also provided with two sets of symmetrical boss mounting holes (42) along the XZ plane direction for fixing the inner bushing of the suspension arm.

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