Front auxiliary frame structure and automobile

Abstract

The invention relates to the technical field of automobile chassis, in particular to a front auxiliary frame structure and an automobile. Longitudinal beams (2) are arranged at the two ends of the rear cross beam (1) respectively. The longitudinal beams (2) are respectively provided with a bending collapse structure and a collision falling structure; the longitudinal beam (2) is connected with a vehicle body; the bending and collapsing structures are bent during collision through the longitudinal beams, so that collision energy is absorbed; therefore, the balance of rigidity, strength and collision energy absorption of the whole structure of the front auxiliary frame can be effectively realized; according to the collision falling-off structure, when front collision happens to an automobile, the front auxiliary frame is separated from an automobile body, an engine is guided to sink, and therefore the deformation energy absorption space of a cabin is increased, and impact and deformation to a passenger compartment are effectively reduced; the energy absorption effect of the front auxiliary frame can be effectively enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile chassis, and in particular to a front auxiliary frame structure and an automobile. Background Art

[0002] The front subframe is an important part of the automobile chassis structure. In addition to ensuring sufficient rigidity and strength, it also directly affects the collision safety of the vehicle in a collision, indirectly reduces the injuries suffered by the driver and passengers, and ensures the safety of the driver and passengers. The current subframe structure is difficult to achieve a balance between rigidity, strength and collision energy absorption, and to enhance the overall structural strength of the front subframe.

[0003] After searching, the applicant found that the Chinese patent document with publication number 205149978U disclosed a front subframe mounting bracket and a front subframe assembly on April 13, 2016, wherein the mounting bracket is used to mount the front subframe on the vehicle body, and the mounting bracket includes a bracket body, on which a bolt hole is formed, wherein a limit arm is formed on the bracket body, and the limit arm is used to be positioned on the front subframe to prevent the bracket body from rotating; this device also cannot solve the above-mentioned technical problem.

[0004] Therefore, in order to improve or solve at least one of the above problems, it is necessary to optimize the existing automobile front subframe structure. Summary of the invention

[0005] The object of the present invention is to provide a front subframe structure and a vehicle capable of enhancing the overall structural strength of the front subframe.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a front subframe structure, including a rear cross beam; longitudinal beams are respectively provided at both ends of the rear cross beam; the longitudinal beams are respectively provided with a bending collapse structure and a collision detachment structure; the longitudinal beams are connected to the vehicle body.

[0007] A front cross beam is provided at one end of the longitudinal beam away from the rear cross beam; both ends of the front cross beam are respectively connected to the longitudinal beam; the bending and collapsing structure is provided at one end of the longitudinal beam close to the front cross beam; the collision and falling-off structure is provided on the longitudinal beam and connected to the vehicle body.

[0008] The longitudinal beam includes a front cross beam connecting section and a rear cross beam connecting section; the bending and collapsing structure includes a mounting section; the mounting section is respectively connected to the front cross beam connecting section and the front cross beam; an angle is arranged between the mounting section and the front cross beam connecting section.

[0009] The angle is arranged on a side of the longitudinal beam away from the front cross beam.

[0010] The collision-detaching structure comprises a front subframe mounting bracket; the front subframe mounting bracket is arranged between the front crossbeam connecting section and the rear crossbeam connecting section; a mounting sleeve is arranged on the front subframe mounting bracket; and the mounting sleeve is connected to the vehicle body.

[0011] The front sub-frame mounting bracket is connected to the top surface of the longitudinal beam; a mounting hole is provided on the front sub-frame mounting bracket; the mounting sleeve is connected to the mounting hole; a mounting surface is provided at one end of the mounting sleeve away from the longitudinal beam; and a drop-off groove is provided on the mounting surface.

[0012] The installation section comprises a lower reinforcing plate; an upper reinforcing plate is arranged on the top of the lower reinforcing plate; an inner reinforcing plate is arranged between the upper reinforcing plate and the lower reinforcing plate; a connecting sleeve is arranged on the upper reinforcing plate; and the connecting sleeve is connected to the vehicle body.

[0013] A first cavity is provided between the upper reinforcing plate and the inner reinforcing plate; a second cavity is provided between the inner reinforcing plate and the lower reinforcing plate; the connecting sleeve is provided in the first cavity and communicated with the second cavity.

[0014] A rear mounting bracket is provided at one end of the rear cross beam connecting section close to the rear cross beam; a rear mounting sleeve is provided on the rear mounting bracket; the rear mounting sleeve is connected to the vehicle body; a rear reinforcing plate is provided on one side of the rear cross beam connecting section; the rear reinforcing plate is connected to a side of the rear cross beam connecting section away from the rear cross beam;

[0015] A front reinforcing plate is provided on one side of the installation section close to the front cross beam; the front reinforcing plate is connected to the front cross beam; a front bracket is provided on the installation section; the front bracket is connected to the front cross beam; an exhaust hook is provided on one side of the rear cross beam; the exhaust hook is connected to an exhaust pipe.

[0016] A car comprises the front subframe structure.

[0017] The beneficial effects of this application are:

[0018] 1. The present application includes a front crossbeam, a rear crossbeam, and left and right longitudinal beams connecting the front crossbeam and the rear crossbeam, which can achieve a balance among stiffness, strength and collision energy absorption to a certain extent; during an offset collision, the entire vehicle absorbs part of the collision energy through the deformation of the front subframe; a reinforcing plate is provided inside the longitudinal beam of the present application, and extends backward along a certain angle with the XZ plane (the X direction is the front direction of the vehicle, and the Z direction is the vertical upward direction of the vehicle), and forms a first crumple section at the first inflection point; this section ensures the energy of the collision, and absorbs the energy of the collision by bending at this inflection point; thereby effectively achieving a balance among stiffness, strength and collision energy absorption of the overall structure of the front subframe.

[0019] 2. The present application welds a front subframe mounting bracket in the middle of the longitudinal beam. The front subframe mounting bracket is provided with a sleeve, and a notch is reserved on the mounting surface as a collision drop-off point. When a head-on collision occurs in the vehicle, the collision drop-off point separates the front subframe from the vehicle body and guides the engine to sink, thereby increasing the deformation energy absorption space of the engine compartment and effectively reducing the impact and deformation on the passenger compartment. The energy absorption effect of the front subframe can be effectively enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings, wherein:

[0021] Figure 1 This is a schematic structural diagram of the front subframe structure of the present application.

[0022] Figure 2 This is a top view of the front subframe structure of the present application.

[0023] Figure 3 It is a side view of the front subframe structure of the present application.

[0024] Figure 4 for Figure 2 A cross-sectional view taken at AA of the front subframe structure of the present application is shown.

[0025] The marks in the above figure are:

[0026] The markings in the figure are:

[0027] 1. Rear cross beam, 101. Exhaust hook,

[0028] 2. Stringer,

[0029] 3. Front crossbeam, 301, front reinforcement plate, 302, front bracket,

[0030] 4. Front crossbeam connection section,

[0031] 5. Rear cross beam connection section,

[0032] 6. Installation section, 601. Lower reinforcement plate, 602. Upper reinforcement plate, 603. Internal reinforcement plate, 604. Connecting sleeve, 605. First cavity, 606. Second cavity,

[0033] 7. Front subframe mounting bracket, 701. Mounting sleeve, 702. Mounting hole, 703. Mounting surface, 704. Drop-off groove,

[0034] 8. Rear mounting bracket, 801. Rear mounting sleeve, 802. Rear reinforcing plate. DETAILED DESCRIPTION

[0035] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and facilitating their implementation.

[0036] Figure 1 The front subframe structure shown includes a rear cross beam 1; longitudinal beams 2 are respectively provided at both ends of the rear cross beam 1; the longitudinal beams 2 are respectively provided with a bending collapse structure and a collision fall-off structure; and the longitudinal beams 2 are connected to the vehicle body.

[0037] The bending and collapse structure absorbs the energy of the collision by bending the longitudinal beam 2 during a collision; thereby, the stiffness, strength and collision energy absorption of the overall structure of the front subframe can be effectively balanced; when a frontal collision occurs in the vehicle, the collision and detachment structure separates the front subframe from the vehicle body and guides the engine to sink, thereby increasing the deformation and energy absorption space of the engine compartment and effectively reducing the impact and deformation on the passenger compartment; thus, the energy absorption effect of the front subframe can be effectively enhanced.

[0038] A front cross beam 3 is provided at one end of the longitudinal beam 2 away from the rear cross beam 1; both ends of the front cross beam 3 are respectively connected to the longitudinal beam 2; the bending and collapse structure is provided at one end of the longitudinal beam 2 close to the front cross beam 3; the collision and detachment structure is provided on the longitudinal beam 2 and connected to the vehicle body.

[0039] The longitudinal beam 2 includes a left longitudinal beam and a right longitudinal beam; the left end of the front cross beam 3 is smoothly connected to the front end of the left longitudinal beam, and is connected to the left longitudinal beam at an angle of approximately 66° through a stamped L-shaped front bracket 302; the right end of the front cross beam 3 is smoothly connected to the right longitudinal beam, and is connected to the right longitudinal beam at an angle of approximately 66° through a stamped L-shaped front bracket 302; the front cross beam 3, the rear cross beam 1, and the left and right longitudinal beams connected between the front cross beam 3 and the rear cross beam 1 can, to a certain extent, achieve a balance among stiffness, strength and collision energy absorption, and effectively improve the structural strength of the front subframe.

[0040] The longitudinal beam 2 includes a front cross beam connecting section 4 and a rear cross beam connecting section 5; the bending and collapsing structure includes a mounting section 6; the mounting section 6 is connected to the front cross beam connecting section 4 and the front cross beam 3 respectively; an angle is provided between the mounting section 6 and the front cross beam connecting section 4.

[0041] During an offset collision, the entire vehicle absorbs part of the collision energy through the deformation of the front subframe; the mounting section 6 of the present application extends backward along a certain angle with the XZ plane (the X direction is the front direction of the vehicle, and the Z direction is the vertical upward direction of the vehicle), and forms the first crushing section at the inflection point between the mounting section 6 and the front cross beam connecting section 4; this section ensures the energy of the collision and absorbs the energy of the collision by bending at this inflection point.

[0042] The angle is set on the side of the longitudinal beam 2 away from the front cross beam 3.

[0043] The angle is 143.14°; when the car is hit, the mounting section 6 of the longitudinal beam 2 and the front cross beam connecting section 4 are bent inwards, thereby achieving effective energy absorption.

[0044] The collision-detaching structure comprises a front subframe mounting bracket 7; the front subframe mounting bracket 7 is arranged between the front crossbeam connecting section 4 and the rear crossbeam connecting section 5; a mounting sleeve 701 is arranged on the front subframe mounting bracket 7; and the mounting sleeve 701 is connected to the vehicle body.

[0045] The front subframe mounting bracket 7 is a triangular convex block; the mounting sleeve 701 is fixedly connected to the front subframe mounting bracket 7 and is fixedly connected to the vehicle body; the front subframe mounting bracket 7 can provide a mounting position for the mounting sleeve 701 and can provide stable support for the mounting sleeve 701; the mounting sleeve 701 can realize the fixed connection between the middle part of the longitudinal beam 2 and the vehicle body.

[0046] The front subframe mounting bracket 7 is connected to the top surface of the longitudinal beam 2; the front subframe mounting bracket 7 is provided with a mounting hole 702; the mounting sleeve 701 is connected to the mounting hole 702; the end of the mounting sleeve 701 away from the longitudinal beam 2 is provided with a mounting surface 703; the mounting surface 703 is provided with a drop-off groove 704.

[0047] The mounting hole 702 is a through hole; the mounting sleeve 701 is sleeved in the mounting hole 702 of the mounting bracket 7 and fixedly connected in the mounting hole 702; the mounting surface 703 of the mounting sleeve 701 is fixedly connected to the vehicle body; the drop-out groove 704 is a square groove and is arranged on the top of the mounting sleeve 701; the drop-out groove 704 can effectively reduce the connection strength between the mounting sleeve 701 and the vehicle body; when the vehicle collides head-on, the drop-out groove 704 separates the front subframe from the vehicle body and guides the engine to sink, thereby increasing the deformation energy absorption space of the engine compartment and effectively reducing the impact and deformation on the passenger compartment; it can effectively enhance the energy absorption effect of the front subframe.

[0048] The mounting section 6 comprises a lower reinforcing plate 601; an upper reinforcing plate 602 is provided on the top of the lower reinforcing plate 601; an inner reinforcing plate 603 is provided between the upper reinforcing plate 602 and the lower reinforcing plate 601; a connecting sleeve 604 is provided on the upper reinforcing plate 602; and the connecting sleeve 604 is connected to the vehicle body.

[0049] The internal reinforcing plate 603 is arranged between the upper reinforcing plate 602 and the lower reinforcing plate 601; the lower reinforcing plate 601 is a U-shaped plate; the arc-shaped top surface of the lower reinforcing plate 601 is close to the upper reinforcing plate 602; the lower reinforcing plate 601 is an L-shaped plate; the connecting edges on both sides of the lower reinforcing plate 601 are welded to the internal reinforcing plate 603; the upper reinforcing plate 602 covers the top of the internal reinforcing plate 603, and the connecting edges on both sides of the upper reinforcing plate 602 are welded to the internal reinforcing plate 603; the tube wall of the connecting sleeve 604 is welded to the upper reinforcing plate 602; one end of the connecting sleeve 604 is welded to the internal reinforcing plate 603 and is connected to the inside of the internal reinforcing plate 603; the other end of the connecting sleeve 604 extends from the top surface of the upper reinforcing plate 602 and is connected to the vehicle body; the connecting sleeve 604 can realize a stable connection between the front section of the longitudinal beam 2 and the vehicle body.

[0050] A first cavity 605 is provided between the upper reinforcing plate 602 and the inner reinforcing plate 603 ; a second cavity 606 is provided between the inner reinforcing plate 603 and the lower reinforcing plate 601 ; a connecting sleeve 604 is provided in the first cavity 605 and communicates with the second cavity 606 .

[0051] A first cavity 605 is formed between the bottom surface of the upper reinforcing plate 602 and the top surface of the internal reinforcing plate 603; when the upper reinforcing plate 602 is collided, the first cavity 605 can provide deformation space for the upper reinforcing plate 602, thereby realizing the first layer of energy absorption; a second cavity 606 is formed between the bottom surface of the internal reinforcing plate 603 and the top surface of the lower reinforcing plate 601; when the upper reinforcing plate 602 and the internal reinforcing plate 603 collide and deform, the second cavity 606 provides deformation space for the internal reinforcing plate 603, thereby realizing the second layer of energy absorption; the cooperation between the first cavity 605 and the second cavity 606 can realize the energy absorption performance of the enhanced longitudinal beam 2, and can effectively enhance the structural strength of the longitudinal beam 2.

[0052] A rear mounting bracket 8 is provided at one end of the rear cross beam connecting section 5 close to the rear cross beam 1; a rear mounting sleeve 801 is provided on the rear mounting bracket 8; the rear mounting sleeve 801 is connected to the vehicle body; a rear reinforcing plate 802 is provided on one side of the rear cross beam connecting section 5 away from the rear cross beam 1;

[0053] A front reinforcing plate 301 is provided on one side of the mounting section 6 close to the front cross beam 3; the front reinforcing plate 301 is connected to the front cross beam 3; a front bracket 302 is provided on the mounting section 6; the front bracket 302 is connected to the front cross beam 3; an exhaust hook 101 is provided on one side of the rear cross beam 1; the exhaust hook 101 is connected to the exhaust pipe.

[0054] The rear mounting bracket 8 is welded to the end of the rear cross beam 1 away from the front cross beam 3; the rear mounting bracket 8 is a square plate; two rear mounting sleeves 801 are fixedly connected to the rear mounting bracket 8; the two rear mounting sleeves 801 are fixedly connected to the vehicle body, so that the rear section of the longitudinal beam 2 can be fixedly connected to the vehicle body; the rear reinforcing plate 802 is a triangular plate; one side of the rear reinforcing plate 802 is welded to the side of the rear mounting bracket 8; the other side of the rear reinforcing plate 802 is welded to the longitudinal beam 2; the rear reinforcing plate 802 can strengthen the structural strength of the connection between the rear mounting bracket 8 and the longitudinal beam 2, thereby ensuring the structural stability of the rear reinforcing plate 802;

[0055] The front reinforcing plate 301 is a triangular plate; one side of the front reinforcing plate 301 is welded to the side of the mounting section 6; the other side of the front reinforcing plate 301 is welded to the bottom surface of the front cross beam 3; the front bracket 302 can achieve a stable connection between the front cross beam 3 and the mounting section 6; the exhaust hook 101 is welded to the side of the rear cross beam 1, which can provide an installation position and stable support for the exhaust pipe.

[0056] A car comprises a front subframe structure.

[0057] The specific workflow of the present invention is as follows:

[0058] The longitudinal beam 2 includes a left longitudinal beam and a right longitudinal beam; the left end of the front cross beam 3 is smoothly connected to the front end of the left longitudinal beam, and is connected to the left longitudinal beam at an angle of about 66° through a stamped L-shaped front bracket 302; the right end of the front cross beam 3 is smoothly connected to the right longitudinal beam, and is connected to the right longitudinal beam at an angle of about 66° through a stamped L-shaped front bracket 302;

[0059] The installation section 6 extends backward along a certain angle with the XZ plane (the X direction is the front direction of the vehicle, and the Z direction is the vertical upward direction of the vehicle), and forms the first collapse section at the inflection point between the installation section 6 and the front cross beam connecting section 4;

[0060] A front subframe mounting bracket 7 is welded between the front crossbeam connecting section 4 and the rear crossbeam connecting section 5; a mounting sleeve 701 is provided on the front subframe mounting bracket 7; and the mounting sleeve 701 is connected to the vehicle body;

[0061] A mounting surface 703 is provided at one end of the mounting sleeve 701 away from the longitudinal beam 2 ; a fall-off groove 704 is provided on the mounting surface 703 as a collision fall-off point.

[0062] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A front subframe structure, characterized in that: It comprises a rear cross beam (1); longitudinal beams (2) are respectively provided at both ends of the rear cross beam (1); the longitudinal beams (2) are respectively provided with a bending collapse structure and a collision fall-off structure; and the longitudinal beams (2) are connected to the vehicle body.

2. A front subframe structure according to claim 1, characterized in that: A front cross beam (3) is provided at one end of the longitudinal beam (2) away from the rear cross beam (1); both ends of the front cross beam (3) are respectively connected to the longitudinal beam (2); the bending and collapsing structure is provided at one end of the longitudinal beam (2) close to the front cross beam (3); and the collision and shedding structure is provided on the longitudinal beam (2) and is connected to the vehicle body.

3. A front subframe structure according to claim 2, characterized in that: The longitudinal beam (2) comprises a front cross beam connecting section (4) and a rear cross beam connecting section (5); the bending and collapsing structure comprises a mounting section (6); the mounting section (6) is respectively connected to the front cross beam connecting section (4) and the front cross beam (3); an angle is provided between the mounting section (6) and the front cross beam connecting section (4).

4. A front subframe structure according to claim 3, characterized in that: The angle is arranged on a side of the longitudinal beam (2) away from the front cross beam (3).

5. A front subframe structure according to any one of claims 3 to 4, characterized in that: The collision-detachment structure comprises a front subframe mounting bracket (7); the front subframe mounting bracket (7) is arranged between the front crossbeam connecting section (4) and the rear crossbeam connecting section (5); a mounting sleeve (701) is arranged on the front subframe mounting bracket (7); and the mounting sleeve (701) is connected to the vehicle body.

6. A front subframe structure according to claim 5, characterized in that: The front sub-frame mounting bracket (7) is connected to the top surface of the longitudinal beam (2); a mounting hole (702) is provided on the front sub-frame mounting bracket (7); the mounting sleeve (701) is connected to the mounting hole (702); a mounting surface (703) is provided at one end of the mounting sleeve (701) away from the longitudinal beam (2); and a drop-out groove (704) is provided on the mounting surface (703).

7. A front subframe structure according to claim 6, characterized in that: The mounting section (6) comprises a lower reinforcing plate (601); an upper reinforcing plate (602) is provided on the top of the lower reinforcing plate (601); an inner reinforcing plate (603) is provided between the upper reinforcing plate (602) and the lower reinforcing plate (601); a connecting sleeve (604) is provided on the upper reinforcing plate (602); and the connecting sleeve (604) is connected to the vehicle body.

8. A front subframe structure according to claim 7, characterized in that: A first cavity (605) is provided between the upper reinforcing plate (602) and the inner reinforcing plate (603); a second cavity (606) is provided between the inner reinforcing plate (603) and the lower reinforcing plate (601); the connecting sleeve (604) is provided in the first cavity (605) and is connected to the second cavity (606).

9. A front subframe structure according to any one of claims 6 to 8, characterized in that: A rear mounting bracket (8) is provided at one end of the rear cross beam connecting section (5) close to the rear cross beam (1); a rear mounting sleeve (801) is provided on the rear mounting bracket (8); the rear mounting sleeve (801) is connected to the vehicle body; a rear reinforcing plate (802) is provided on one side of the rear cross beam connecting section (5); the rear reinforcing plate (802) is connected to a side of the rear cross beam connecting section (5) away from the rear cross beam (1); A front reinforcing plate (301) is provided on a side of the installation section (6) close to the front cross beam (3); the front reinforcing plate (301) is connected to the front cross beam (3); a front bracket (302) is provided on the installation section (6); the front bracket (302) is connected to the front cross beam (3); an exhaust hook (101) is provided on one side of the rear cross beam (1); and the exhaust hook (101) is connected to an exhaust pipe.

10. An automobile, characterized in that: It comprises the front subframe structure as described in any one of claims 1 to 9.

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