Front subframe structure and automobile

Abstract

The present application relates to the technical field of automobile chassis, in particular to a front subframe structure and an automobile, comprising a rear cross beam (1); both ends of the rear cross beam (1) are respectively provided with longitudinal beams (2); the longitudinal beams (2) are respectively provided with bending collapse structures and collision shedding structures; the longitudinal beams (2) are connected with the vehicle body; the bending collapse structures are bent through the longitudinal beams in collision, and the energy of collision is absorbed; so that the balance of the rigidity, the strength and the collision energy absorption of the overall structure of the front subframe can be effectively realized; the collision shedding structures can separate the front subframe from the vehicle body when the automobile collides frontally, guide the sinking of the engine, increase the deformation energy absorption space of the engine compartment, effectively reduce the impact and deformation on the passenger compartment, and effectively strengthen the energy absorption effect of the front subframe.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile chassis, in particular, the present application relates to a front subframe structure and automobile. BACKGROUND

[0002] The front subframe is an important part of the automobile chassis structure, in addition to ensuring sufficient stiffness and strength, it also directly affects the crash safety of the vehicle in the crash, indirectly reduces the harm suffered by the driver and passenger, and ensures the safety of the driver and passenger; the current front subframe structure is difficult to balance the stiffness, strength and crash energy absorption, and the overall structural strength of the front subframe is strengthened.

[0003] The applicant found that the Chinese patent document with publication number 205149978U disclosed a front subframe mounting bracket and front subframe assembly on April 13, 2016, the mounting bracket is used for mounting the front subframe to the vehicle body, the mounting bracket includes a bracket body, a bolt hole is formed on the bracket body, wherein, the bracket body forms a limiting arm, the limiting arm is used for positioning on the front subframe, so as to prevent the bracket body from rotating; the device cannot solve the above technical problems.

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

[0005] The purpose of the present application is to provide a front subframe structure and automobile which can strengthen the overall structural strength of the front subframe.

[0006] In order to solve the above technical problems, the technical scheme adopted by the present application is as follows: a front subframe structure, comprising a rear cross beam; the two ends of the rear cross beam are respectively provided with longitudinal beams; the longitudinal beams are respectively provided with bending collapse structures and collision shedding structures; the longitudinal beams are connected with the vehicle body.

[0007] The end of the longitudinal beam away from the rear cross beam is provided with a front cross beam; the two ends of the front cross beam are respectively connected with the longitudinal beams; the bending collapse structure is arranged at the end of the longitudinal beam close to the front cross beam; the collision shedding structure is arranged on the longitudinal beam and connected with the vehicle body.

[0008] The longitudinal beam comprises a front cross beam connecting section and a rear cross beam connecting section; the bending collapse structure comprises a mounting section; the mounting section is connected with the front cross beam connecting section and the front cross beam; an included angle is arranged between the mounting section and the front cross beam connecting section.

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

[0010] The collision shedding structure comprises a front subframe mounting bracket; the front subframe mounting bracket is arranged between the front beam connecting section and the rear beam connecting section; the front subframe mounting bracket is provided with a mounting sleeve; and the mounting sleeve is connected with the vehicle body.

[0011] The front subframe mounting bracket is connected on the top surface of the longitudinal beam; the front subframe mounting bracket is provided with a mounting hole; the mounting sleeve is connected in the mounting hole; the mounting sleeve is provided with a mounting surface at the end away from the longitudinal beam; and the mounting surface is provided with a shedding groove.

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

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

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

[0015] The mounting section is provided with a front reinforcing plate at the side close to the front beam; the front reinforcing plate is connected with the front beam; the mounting section is provided with a front bracket; the front bracket is connected with the front beam; one side of the rear beam is provided with an exhaust hook; and an exhaust pipe is connected with the exhaust hook.

[0016] The automobile comprises the front subframe structure.

[0017] The application has the following beneficial effects:

[0018] 1. The application comprises a front beam, a rear beam, and left and right longitudinal beams connecting the front beam and the rear beam, which can balance the rigidity, strength and collision energy absorption to a certain extent; in the process of offset collision, part of the collision energy is absorbed through the deformation of the front subframe; the longitudinal beam is provided with reinforcing plates inside, and extends backward at a certain angle with the XZ plane (X direction is the front direction of the vehicle, and Z direction is the vertical upward direction of the vehicle); at the first inflection point, a first collapsing section is formed; this part ensures that the collision energy is absorbed through bending at the inflection point; thereby, the balance of the rigidity, strength and collision energy absorption of the overall structure of the front subframe can be effectively realized.

[0019] 2, the present application in the middle of the longitudinal beam welding before the subframe mounting bracket, front subframe mounting bracket has a sleeve, installation surface reserved a notch, as a collision off point; collision off point in the car when the front collision, by making the front subframe and body separation, guide engine subsidence, thus increasing the deformation of the engine compartment space, effectively reduce the impact and deformation of the passenger compartment; can effectively enhance the energy absorption effect of front subframe. BRIEF DESCRIPTION OF DRAWINGS

[0020] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings, in which:

[0021] Figure 1 is the structure diagram of the front subframe structure of the present application.

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

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

[0024] Figure 4 is Figure 2 is the A-A sectional view of the front subframe structure of the present application.

[0025] The marks in the above figures are:

[0026] The marks in the figures are:

[0027] 1, rear cross beam, 101, exhaust hook,

[0028] 2, longitudinal beam,

[0029] 3, front cross beam, 301, front reinforcement plate, 302, front bracket,

[0030] 4, front cross beam connecting section,

[0031] 5, rear cross beam connecting section,

[0032] 6, mounting 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, off slot,

[0034] 8, rear mounting bracket, 801, rear mounting sleeve, 802, rear reinforcement plate. DETAILED DESCRIPTION

[0035] The specific embodiments of the present application are further described in detail below with reference to the accompanying drawings, and the purpose is to help the technical personnel in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solutions of the present application, and to help them to implement.

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

[0037] The bending collapse structure is bent during a collision through the longitudinal beams 2, absorbing the collision energy; thereby effectively achieving the balance of the stiffness, strength and collision energy absorption of the overall structure of the front subframe; the collision shedding structure, when the vehicle is subjected to a frontal collision, separates the front subframe from the vehicle body, guiding the engine to sink, thereby increasing the deformation energy absorption space of the engine compartment, effectively reducing the impact and deformation on the passenger compartment; the energy absorption effect of the front subframe can be effectively enhanced.

[0038] The end of the longitudinal beam 2 away from the rear cross beam 1 is provided with a front cross beam 3; the two ends of the front cross beam 3 are respectively connected with the longitudinal beams 2; the bending collapse structure is arranged at the end of the longitudinal beam 2 close to the front cross beam 3; the collision shedding structure is arranged on the longitudinal beam 2 and connected with 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 with the front end of the left longitudinal beam, and is connected with the left longitudinal beam through a stamping L-shaped front support 302 at an angle of about 66°; the right end of the front cross beam 3 is smoothly connected with the right longitudinal beam, and is connected with the right longitudinal beam through a stamping L-shaped front support 302 at an angle of about 66°; the front cross beam 3, the rear cross beam 1, and the left and right longitudinal beams connecting the front cross beam 3 and the rear cross beam 1 can achieve a balance of stiffness, strength and collision energy absorption to a certain extent, effectively improving 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 collapse structure includes a mounting section 6; the mounting section 6 is connected with the front cross beam connecting section 4 and the front cross beam 3 respectively; an included angle is arranged between the mounting section 6 and the front cross beam connecting section 4.

[0041] During the offset collision process of the whole vehicle, part of the collision energy is absorbed through the deformation of the front subframe; the mounting section 6 of the present application extends backward along a certain included angle with the XZ plane (X direction is the front direction of the vehicle, Z direction is the vertical upward direction of the vehicle), and a first collapse section is formed at the inflection point of the mounting section 6 and the front cross beam connecting section 4; this part ensures that the collision energy is absorbed through bending at this inflection point.

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

[0043] The included angle is 143.14°; when the automobile is impacted, the mounting section 6 of the longitudinal beam 2 and the front cross beam connecting section 4 are bent inward, so as to realize effective energy absorption.

[0044] The collision shedding structure comprises a front subframe mounting bracket 7; the front subframe mounting bracket 7 is arranged between the front cross beam connecting section 4 and the rear cross beam connecting section 5; the front subframe mounting bracket 7 is provided with a mounting sleeve 701; the mounting sleeve 701 is connected with the vehicle body.

[0045] The front subframe mounting bracket 7 is a triangular protrusion; the mounting sleeve 701 is fixedly connected on the front subframe mounting bracket 7 and fixedly connected with 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 fixed connection of the middle part of the longitudinal beam 2 with the vehicle body.

[0046] The front subframe mounting bracket 7 is connected on 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 in the mounting hole 702; the mounting sleeve 701 is provided with a mounting surface 703 away from the longitudinal beam 2; the mounting surface 703 is provided with a shedding 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 with the vehicle body; the shedding groove 704 is a square groove and arranged on the top of the mounting sleeve 701; the shedding groove 704 can effectively reduce the connection strength between the mounting sleeve 701 and the vehicle body; when the automobile is subjected to a frontal collision, the shedding groove 704 can separate the front subframe from the vehicle body, guide the engine to sink, thereby increasing the deformation energy absorption space of the engine compartment, effectively reducing the impact and deformation on the passenger compartment, and effectively enhancing the energy absorption effect of the front subframe.

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

[0049] The inner 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 two side connecting edges of the lower reinforcing plate 601 are welded with the inner reinforcing plate 603; the upper reinforcing plate 602 covers the top of the inner reinforcing plate 603, and the two side connecting edges of the upper reinforcing plate 602 are welded with the inner reinforcing plate 603; the pipe wall of the connecting sleeve 604 is welded with the upper reinforcing plate 602; one end of the connecting sleeve 604 is welded with the inner reinforcing plate 603 and communicates with the inner 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 with the vehicle body; the connecting sleeve 604 can realize stable connection between the front section of the longitudinal beam 2 and the vehicle body.

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

[0051] The first cavity 605 is formed between the bottom surface of the upper reinforcing plate 602 and the top surface of the inner reinforcing plate 603; the first cavity 605 can provide deformation space for the upper reinforcing plate 602 when the upper reinforcing plate 602 is subjected to impact, thereby realizing the first layer of energy absorption; the second cavity 606 is formed between the bottom surface of the inner reinforcing plate 603 and the top surface of the lower reinforcing plate 601; the second cavity 606 provides deformation space for the inner reinforcing plate 603 when the upper reinforcing plate 602 and the inner reinforcing plate 603 are subjected to impact deformation, thereby realizing the second layer of energy absorption; the first cavity 605 and the second cavity 606 cooperate to realize the energy absorption performance of the reinforced longitudinal beam 2 and effectively strengthen the structural strength of the longitudinal beam 2.

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

[0053] The front reinforcing plate 301 is arranged on the side of the mounting section 6 close to the front beam 3; the front reinforcing plate 301 is connected with the front beam 3; the front bracket 302 is arranged on the mounting section 6; the front bracket 302 is connected with the front beam 3; the exhaust hook 101 is arranged on one side of the rear beam 1; the exhaust pipe is connected with the exhaust hook 101.

[0054] The rear mounting bracket 8 is welded at 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 on the rear mounting bracket 8; the two rear mounting sleeves 801 are fixedly connected with the vehicle body, so that the fixed connection between the rear section of the longitudinal beam 2 and the vehicle body can be realized; the rear reinforcing plate 802 is a triangular plate; one side of the rear reinforcing plate 802 is welded with the side of the rear mounting bracket 8; the other side of the rear reinforcing plate 802 is welded with 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, and ensure 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 with the side of the mounting section 6; the other side of the front reinforcing plate 301 is welded with the bottom surface of the front cross beam 3; the front bracket 302 can realize the stable connection between the front cross beam 3 and the mounting section 6; the exhaust hook 101 is welded on the side of the rear cross beam 1, which can provide a mounting position and stable support for the exhaust pipe.

[0056] An automobile comprises a front subframe structure.

[0057] The specific work flow of the present application is as follows:

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

[0059] The mounting section 6 extends rearward 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); at the inflection point between the mounting section 6 and the front cross beam connecting section 4, a first collapse section is formed;

[0060] The front subframe mounting bracket 7 is welded between the front cross beam connecting section 4 and the rear cross beam connecting section 5; the mounting sleeve 701 is arranged on the front subframe mounting bracket 7; and the mounting sleeve 701 is connected with the vehicle body;

[0061] 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 shedding groove 704 as a collision shedding point.

[0062] The present application has been described above with reference to the drawings. Obviously, the specific implementation of the present application is not limited to the above-described manner. As long as various non-essential improvements are made by adopting the method concept and technical solution of the present application, or the above-mentioned concept and technical solution of the present application is directly applied to other occasions without improvement, they are all within the protection scope of the present application.

Claims

1. A front subframe structure, characterized in that: The utility model provides a rear beam (1), the both ends of rear beam (1) are equipped with longitudinal beam (2) respectively, longitudinal beam (2) is equipped with bending collapse structure and crash off structure respectively, longitudinal beam (2) is connected with vehicle body, The one end of longitudinal beam (2) is equipped with front beam (3) away from rear beam (1), the both ends of front beam (3) are connected with longitudinal beam (2) respectively, bending collapse structure is equipped in the one end of longitudinal beam (2) close to front beam (3), crash off structure is equipped on longitudinal beam (2) and is connected with vehicle body, Longitudinal beam (2) includes front beam connecting section (4) and rear beam connecting section (5), bending collapse structure includes mounting section (6), mounting section (6) is connected with front beam connecting section (4) and front beam (3) respectively, the included angle is equipped between mounting section (6) and front beam connecting section (4), The included angle is equipped in the side of longitudinal beam (2) away from front beam (3), Crash off structure includes front subframe mounting bracket (7), front subframe mounting bracket (7) is equipped between front beam connecting section (4) and rear beam connecting section (5), front subframe mounting bracket (7) is equipped with mounting sleeve (701), mounting sleeve (701) is connected with vehicle body, Front subframe mounting bracket (7) is connected on the top surface of longitudinal beam (2), mounting hole (702) is equipped in front subframe mounting bracket (7), mounting sleeve (701) is connected in mounting hole (702), mounting face (703) is equipped in the one end of mounting sleeve (701) away from longitudinal beam (2), off slot (704) is equipped on mounting face (703).

2. A front subframe structure according to claim 1, characterized in that: Mounting section (6) includes lower reinforcing plate (601), the top of lower reinforcing plate (601) is equipped with upper reinforcing plate (602), the first cavity (605) is equipped between upper reinforcing plate (602) and internal reinforcing plate (603), the second cavity (606) is equipped between internal reinforcing plate (603) and lower reinforcing plate (601), connecting sleeve (604) is equipped in first cavity (605) and is communicated with second cavity (606).

3. A front subframe structure according to claim 2, characterized in that: The first cavity (605) is equipped between upper reinforcing plate (602) and internal reinforcing plate (603), the second cavity (606) is equipped between internal reinforcing plate (603) and lower reinforcing plate (601), connecting sleeve (604) is equipped in first cavity (605) and is communicated with second cavity (606).

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

5. An automobile characterized by comprising: The front subframe structure comprises the front subframe structure according to any one of claims 1-4.

Images