Small tailor-welded frame-shaped all-aluminum front auxiliary frame

Abstract

The utility model provides a small tailor-welded frame-shaped all-aluminum front auxiliary frame which comprises an auxiliary frame body, the auxiliary frame body is a frame-shaped auxiliary frame shaped like a Chinese character'ri ', the frame-shaped auxiliary frame shaped like the Chinese character'ri' comprises two longitudinal beams which are symmetrically arranged, any longitudinal beam is formed by welding a front-end casting and a rear-end aluminum beam, the front-end casting is of an arc-shaped structure, and the rear-end aluminum beam is of an arc-shaped structure. One end of the arc-shaped structure is connected with the rear-end aluminum beam, and the other end of the arc-shaped structure is bent towards one side far away from the front cross beam; the cross section of the front-end casting is of two 7-shaped structures which are connected up and down, a bolt mounting space is arranged in an included angle of the 7-shaped structures, and the bolt mounting space is of a concave structure. According to the utility model, the front cross beam, the middle cross beam, the rear cross beam and the rear-end aluminum beam are all made of extruded aluminum alloy sections, so that the mechanical properties such as dynamic and static rigidity, strength and the like of the auxiliary frame can be well improved; swing arm mounting positions of the left casting and the right casting at the front end are provided with concave structures, and wrench space is provided for mounting adjusting bolts.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive aluminum alloy structural parts, and particularly relates to a small-sized welded frame-shaped all-aluminum front subframe. Background Art

[0002] In recent years, due to the booming development of new energy vehicles, the demand for vehicle lightweighting has become increasingly strong. Aluminum alloy is widely used in automotive parts due to its high specific strength. Especially in the chassis system, aluminum alloy subframes have become standard equipment for high-end new energy vehicles. Compared with steel subframes of the same design, all-aluminum subframes can reduce weight by at least 35%, which plays a crucial role in vehicle lightweighting and improving the cruising range. During vehicle braking, vertical impact, steering, reversing, acceleration and other working conditions, they bear very complex loads and fatigue failure problems.

[0003] Extruded aluminum alloy profiles can better improve the dynamic and static stiffness, strength and other mechanical properties of the subframe, but there are the following technical defects: extruded aluminum alloy profiles cannot achieve complex spatial designs.

[0004] Therefore, how to design a small-sized welded frame-shaped all-aluminum front subframe that combines the two processes of extruded aluminum alloy profiles and cast aluminum alloy and realizes complex spatial design has become an urgent problem to be solved. Summary of the Utility Model

[0005] Aiming at the problems existing in the prior art, the utility model provides a small-sized welded frame-shaped all-aluminum front subframe to solve at least one of the above technical problems.

[0006] The technical solution of the utility model is: a small-sized welded frame-shaped all-aluminum front subframe, including a subframe body. The subframe body is a "day"-shaped frame subframe. The "day"-shaped frame subframe includes two symmetrically arranged longitudinal beams. A front cross beam, a middle cross beam and a rear cross beam are sequentially arranged between the two longitudinal beams from front to back. Any one of the longitudinal beams is welded by a front-end casting and a rear-end aluminum beam. The front-end casting is an arc-shaped structure. One end of the arc-shaped structure is connected to the rear-end aluminum beam, and the other end of the arc-shaped structure bends towards the side away from the front cross beam. The cross section of the front-end casting is two "7"-shaped structures connected up and down. A vehicle body front mounting point is arranged at the end of the horizontal plate of the upper "7"-shaped structure away from the vertical plate, and the vehicle body front mounting point is located on the side away from the front cross beam. A bolt mounting space is arranged inside the included angle of the "7"-shaped structure. The bolt mounting space is a concave structure, and both bolt mounting spaces are located on the end face on the side away from the middle cross beam. A rear swing arm mounting bracket is arranged on the side of any one of the rear-end aluminum beams. The rear swing arm mounting bracket is a "well"-shaped extruded profile, and one end of the "well"-shaped extruded profile arranged horizontally along the rear-end aluminum beam is a second U-shaped bracket.

[0007] The utility model adopts a lightweight all-aluminum front subframe that combines extruded aluminum alloy profiles and cast aluminum alloy processes. The front end casting adopts aluminum die-casting technology to achieve complex space design. The aluminum alloy casting accounts for only about 25% of the total weight of the subframe; the front crossbeam, middle crossbeam, rear crossbeam, and rear end aluminum beam are all made of extruded aluminum alloy profiles, which can better improve the dynamic and static stiffness, strength and other mechanical properties of the subframe; all aluminum alloy parts are welded, which not only ensures the performance and yield of the subframe, but also reduces the weight by at least 30%, and can be used as a four-wheel drive Subframe used; the rear swing arm mounting bracket adopts a "well" shaped extruded profile, and the extrusion direction is horizontal to the rear end aluminum beam, extending the welding space with the longitudinal beam, effectively improving the dynamic and static stiffness of the swing arm bracket in the "Z" and "X" directions; after welding, the assembly surface and mounting holes are machined by the assembly machine to ensure assembly accuracy; in order to increase the rigidity and strength of the product, there are 1 to 3 reinforcing ribs in the front crossbeam, middle crossbeam, rear crossbeam and rear end aluminum beam; the subframe weighs only 15.5 kg; a recessed structure is designed at the front left and right casting swing arm mountings to provide a wrench space for installing the adjusting bolts.

[0008] Preferably, the middle cross beam is a hollow beam, the cross section of the hollow beam is a trapezoidal cross section, the trapezoidal cross section is a right-angled trapezoidal structure, a reinforcing rib is arranged in the trapezoidal cross section, the reinforcing rib is perpendicular to the inclined surface of the right-angled trapezoidal structure; a first suspension frame is arranged on the inclined surface of the right-angled trapezoidal structure. Both ends of the middle cross beam penetrate the front end casting and are welded, a reinforcing rib is arranged in the trapezoidal cross section, the reinforcing rib is located between the right angle and the inclined surface of the right-angled trapezoidal structure, and the reinforcing rib is perpendicular to the inclined surface of the right-angled trapezoidal structure.

[0009] The central cross beam of the utility model adopts an extruded cross section of a right-angled trapezoidal structure, and reinforcing ribs are added to the inclined surface perpendicular to the right-angled trapezoidal structure to improve the dynamic and static rigidity and strength of the front suspension in the "Z" direction and the "X" direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a three-dimensional diagram of the present utility model.

[0011] Figure 2 It is a top view of the utility model.

[0012] Figure 3 It is a bottom view of the utility model.

[0013] Figure 4 It is a rear view of the utility model.

[0014] Figure 5 It is a left view of the utility model.

[0015] Figure 6 It is a schematic diagram of the installation structure of the rear end aluminum beam and the rear swing arm mounting bracket of the utility model.

[0016] In the figure: 1. Front end casting; 2. Front crossbeam; 3. Middle crossbeam; 4. Rear crossbeam; 5. Stabilizer bar mounting boss; 6. Steering gear mounting boss; 7. Suspension mounting point; 8. Bolt mounting space; 9. Rear swing arm mounting bracket; 10. Front swing arm mounting bracket; 11. Vehicle front mounting point; 12. Vehicle rear mounting point; 13. Rear end aluminum beam; 301. Reinforcement rib; 302. Trapezoidal section; 303. C-type welding interface. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings.

[0018] See also Figure 1-6 The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the utility model without affecting the effects and purposes that can be achieved by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantial change of the technical content.

[0019] Embodiment 1: A small welded frame-shaped all-aluminum front subframe, referring to Figure 1 , Figure 2 , Figure 3 , Figure 4, including a subframe body, the subframe body being a "day"-shaped frame subframe. The "day"-shaped frame subframe includes two symmetrically arranged longitudinal beams. Between the two longitudinal beams, a front crossbeam 2, a middle crossbeam 3, and a rear crossbeam 4 are sequentially arranged from front to back. Any one of the longitudinal beams is welded by a front-end casting 1 and a rear-end aluminum beam 13. The front-end casting 1 is an arc-shaped structure. One end of the arc-shaped structure is connected to the rear-end aluminum beam 13, and the other end of the arc-shaped structure bends toward the side away from the front crossbeam 2; the cross-section of the front-end casting 1 is two "7"-shaped structures connected up and down. At the end of the horizontal plate of the upper "7"-shaped structure away from the vertical plate, there is a vehicle body front mounting point 11, and the vehicle body front mounting point 11 is located on the side away from the front crossbeam 2; a bolt mounting space 8 is arranged within the included angle of the "7"-shaped structure. The bolt mounting space 8 is a recessed structure, and both bolt mounting spaces 8 are located on the end face away from the middle crossbeam 3. The utility model adopts a lightweight all-aluminum front subframe that combines the two processes of extruded aluminum alloy profiles and cast aluminum alloy. Its front-end casting adopts the aluminum die-casting process to achieve complex spatial design. The aluminum alloy casting only accounts for about 25% of the total weight of the subframe; the front crossbeam, middle crossbeam, rear crossbeam, and rear-end aluminum beam all adopt extruded aluminum alloy profiles, which can better improve the dynamic and static stiffness, strength, and other mechanical properties of the subframe; all aluminum alloy parts adopt the welding process, which not only ensures the performance and yield rate of the subframe but also reduces the weight by at least more than 30%, and can be used as a four-wheel drive subframe; after welding, the assembly machining assembly surface and mounting hole positions are processed to ensure the assembly accuracy; to increase the stiffness and strength of the product, there are 1 to 3 reinforcing ribs in the front crossbeam, middle crossbeam, rear crossbeam, and rear-end aluminum beam; the weight of the subframe is only 15.5 kg; a recessed structure is designed at the swing arm mounting positions of the left and right front-end castings to provide a wrench space for installing adjustment bolts; the welding interfaces between the front crossbeam, middle crossbeam, and front-end casting adopt a "C"-shaped interface, and the welding between the rear-end aluminum beam and the front-end casting adopts an "open" -shaped interface.

[0020] Embodiment 2: On the basis of Embodiment 1, the middle crossbeam 3 is a hollow beam. The cross-section of the hollow beam is a trapezoidal cross-section 302. The trapezoidal cross-section 302 is a right trapezoidal structure. Reinforcing ribs 301 are arranged within the trapezoidal cross-section 302, and the reinforcing ribs 301 are perpendicular to the inclined surface of the right trapezoidal structure; a first suspension bracket is arranged on the inclined surface of the right trapezoidal structure. The middle crossbeam of the utility model adopts a trapezoidal extrusion cross-section, and reinforcing ribs are added perpendicular to the trapezoidal inclined surface to improve the dynamic and static stiffness and strength of the front suspension in the "Z" direction and "X" direction.

[0021] Embodiment 3: Based on Embodiment 2, the first suspension frame is a first U-shaped bracket, the upper and lower bottoms of the right-angled trapezoidal structure are flush with the horizontal plane, and the opening of the first U-shaped bracket faces one side of the rear cross beam 4; the second suspension frames are respectively arranged at both ends of the top surface of the rear cross beam 4, and the first suspension frame and the two second suspension frames constitute a suspension installation point 7, and the second suspension frame includes a round tube, and the axial direction of the round tube is arranged in the same direction along the longitudinal direction of the rear end aluminum beam 13. The utility model adopts the first suspension frame and the two second suspension frames to constitute the suspension installation point.

[0022] Embodiment 4: Based on Embodiment 2, the two ends of the middle cross beam 3 penetrate the front casting 1 and are welded, and the reinforcing ribs 301 are located between the right angle and the inclined surface of the right-angle trapezoidal structure. The welding interface between the middle cross beam and the front casting of the utility model adopts a "C"-shaped interface, and the C-shaped interface between the left and right front castings and the middle cross beam is increased with inclined reinforcing ribs, which improves the rigidity and strength of the middle cross beam in the "X" direction.

[0023] Embodiment 5: Based on Embodiment 1, the waists of the right-angled trapezoidal structure are provided with positioning plates, which are flush with the horizontal plane; the front end casting 1 and the corresponding positions of the positioning plates are provided with C-shaped welding interfaces 303, and the positioning plates are located in the C-shaped welding interfaces 303. The middle cross beam of the utility model adopts positioning plates provided on the two waists of the right-angled trapezoidal structure, which are installed and positioned in the front end casting by the positioning plates, thereby ensuring the inclined angle of the right-angled trapezoidal structure.

[0024] Embodiment 6, on the basis of embodiment 5, the top surface of any of the front-end castings 1 facing the side of the rear-end aluminum beam 13 is provided with a front body mounting point 11, a stabilizer bar mounting boss 5, and a steering gear mounting boss 6 in sequence, the stabilizer bar mounting boss 5 is a cast waist-shaped long boss, and the steering gear mounting boss 6 is a cast circular boss. The utility model adopts two front-end castings to respectively set the rear body mounting points to achieve two-point installation of the front end of the subframe and the body; the stabilizer bar mounting boss is a cast waist-shaped long boss, with threaded holes processed to provide a stabilizer bar mounting point and surface; the steering gear mounting boss is a cast circular boss, with threaded holes processed to provide a steering gear mounting point and surface.

[0025] Embodiment 7: Based on Embodiment 1, the two ends of the rear cross beam 4 are respectively provided with rear body mounting points 12. The utility model adopts the rear body mounting points to be respectively provided at the two ends of the rear cross beam, so as to realize the two-point mounting of the rear end of the subframe and the body; the subframe and the body are connected by four-point mounting.

[0026] Embodiment 8: Based on Embodiment 1, Figure 6, a rear swing arm mounting bracket 9 is provided on the side of any of the rear aluminum beams 13, and the rear swing arm mounting bracket 9 is a "well" shaped extruded profile, and one end of the "well" shaped extruded profile arranged transversely along the rear aluminum beam 13 is a second U-shaped bracket, and the opening of the second U-shaped bracket faces the side away from the middle cross beam 3. The rear swing arm mounting bracket of the utility model adopts a "well" shaped extruded profile, and the extrusion direction is the Y direction, which extends the welding space with the longitudinal beam, and adds the side oblique support, which effectively improves the dynamic and static stiffness of the swing arm bracket in the "Z" direction and the "X" direction.

[0027] Embodiment 9: Based on the embodiment 1, the bottom surface of any of the front end castings 1 is provided with a front swing arm mounting bracket 10, the front swing arm mounting bracket 10 is arranged obliquely, and the extension points of the two front swing arm mounting brackets 10 intersect on the side close to the front cross beam 2. The front swing arm mounting bracket of the utility model provides a mounting clamping surface by machined lifting ears.

[0028] The above are only preferred implementations of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A small-sized welded aluminum frame front subframe, including a subframe body, the subframe body being a "day"-shaped frame subframe, characterized in that: The "day"-shaped frame subframe includes two symmetrically arranged longitudinal beams. Between the two longitudinal beams, a front cross beam (2), a middle cross beam (3), and a rear cross beam (4) are sequentially arranged from front to back. Any one of the longitudinal beams is welded by a front end casting (1) and a rear end aluminum beam (13). The front end casting (1) is an arc-shaped structure. One end of the arc-shaped structure is connected to the rear end aluminum beam (13), and the other end of the arc-shaped structure bends towards the side away from the front cross beam (2). The cross-section of the front end casting (1) is two "7"-shaped structures connected up and down. At the end of the horizontal plate of the upper "7"-shaped structure away from the vertical plate, a front vehicle body mounting point (11) is provided. The front vehicle body mounting point (11) is located on the side away from the front cross beam (2). A bolt mounting space (8) is arranged inside the angle of the "7"-shaped structure. The bolt mounting space (8) is a concave structure. Both of the two bolt mounting spaces (8) are located on the end face on the side away from the middle cross beam (3). A rear swing arm mounting bracket (9) is arranged on the side surface of any one of the rear end aluminum beams (13). The rear swing arm mounting bracket (9) is a "well"-shaped extrusion profile. One end of the "well"-shaped extrusion profile arranged horizontally along the rear end aluminum beam (13) is a second U-shaped bracket.

2. The small-sized welded frame-shaped all-aluminum front subframe according to claim 1 is characterized in that: The middle cross beam (3) is a hollow beam. The cross-section of the hollow beam is a trapezoidal cross-section (302). The trapezoidal cross-section (302) is a right trapezoidal structure. Reinforcing ribs (301) are arranged inside the trapezoidal cross-section (302). The reinforcing ribs (301) are perpendicular to the inclined surface of the right trapezoidal structure. A first mounting bracket is arranged on the inclined surface of the right trapezoidal structure.

3. The small-sized welded frame-shaped all-aluminum front subframe according to claim 2 is characterized in that: The first mounting bracket is a first U-shaped bracket. The upper base and the lower base of the right trapezoidal structure are both flush with the horizontal plane. The opening of the first U-shaped bracket faces the side of the rear cross beam (4). Second mounting brackets are respectively arranged at both ends of the top surface of the rear cross beam (4). The first mounting bracket and the two second mounting brackets form a mounting point (7) for the mounting. The second mounting bracket includes a round tube. The axial direction of the round tube is arranged in the same direction as the longitudinal direction of the rear end aluminum beam (13).

4. The small-sized welded frame-shaped all-aluminum front subframe according to claim 2 is characterized in that: Both ends of the middle cross beam (3) penetrate through the front end casting (1) and then are welded. The reinforcing ribs (301) are located between the right angle and the inclined surface of the right trapezoidal structure.

5. The small-sized welded frame-shaped all-aluminum front subframe according to claim 2 is characterized in that: Positioning plates are arranged on the waists of the right trapezoidal structures. The positioning plates are both flush with the horizontal plane. C-shaped welding interfaces (303) are arranged at the corresponding positions of the front end casting (1) and the positioning plates. The positioning plates are located inside the C-shaped welding interfaces (303).

6. The small-sized welded frame-shaped all-aluminum front subframe according to claim 5 is characterized in that: On the side of the top surface of any one of the front end castings (1) facing the rear end aluminum beam (13), a front vehicle body mounting point (11), a stabilizer bar mounting boss (5), and a steering gear mounting boss (6) are sequentially arranged.

7. The small welded frame-shaped all-aluminum front subframe according to claim 1 is characterized in that: Vehicle body rear mounting points (12) are respectively arranged at both ends of the rear cross beam (4).

8. The small-sized welded frame-shaped all-aluminum front subframe according to claim 1 is characterized in that: The opening of the second U-shaped bracket faces the side away from the middle cross beam (3).

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