Auxiliary frame reinforcing plate with welding connection structure, installation method and auxiliary frame

Abstract

The invention discloses an auxiliary frame reinforcing plate with welding connection structures, an installation method and an auxiliary frame. The auxiliary frame reinforcing plate comprises two auxiliary frame longitudinal beam upper plates and an auxiliary frame front cross beam upper plate, and the two auxiliary frame longitudinal beam upper plates are connected to the two ends of the auxiliary frame front cross beam upper plate through the welding connection structures respectively; an overlapping surface is arranged at the connecting position of the auxiliary frame longitudinal beam upper plate and the auxiliary frame front cross beam upper plate, and the connecting position is connected by welding; the auxiliary frame longitudinal beam upper plate and the auxiliary frame front cross beam upper plate are connected through the welding seam connecting structure, the local stress of the welding seam can be remarkably reduced through the design of the welding seam connecting structure, the reliability and the using mileage of the auxiliary frame are improved, and the modal performance and the rigidity performance are improved; compared with the improvement of the overall structure of the existing auxiliary frame, only the local structure of the auxiliary frame needs to be improved, a new mold does not need to be arranged again, the cost is low, and the structure is simple.

Description

Technical Field

[0001] The invention relates to the technical field of automobiles, and in particular to a subframe reinforcement plate with a welding connection structure, a mounting method and a subframe. Background Art

[0002] The subframe is one of the important structural parts in the automobile structure. The subframe not only connects the vehicle body, but also serves as an important supporting structure for components such as stabilizer bars, steering gears, engine mounts, and swing arms. The vehicle is subjected to impact forces from all directions on the ground and engine loads during driving, and its complex forces require the subframe to have sufficient strength. In terms of comfort, the subframe needs to block vibration and noise and reduce transmission to the car compartment, so the modal and stiffness of the subframe are also very important.

[0003] At present, the subframe is mostly focused on the overall structural design of the subframe, such as improving the strength of the subframe by improving the overall structure of the subframe. This overall structural improvement has a significant change in the structure of the subframe, and a new mold needs to be redesigned to achieve it, resulting in low scalability of the subframe and high development costs. In addition, there is also the adjustment of the installation position of the subframe upper suspension, control arm bracket and bent arm bracket to improve the scalability of the subframe and reduce the development cost, but the subframe after the adjustment of the installation position may affect the force distribution of the subframe, thereby affecting the strength of the subframe.

[0004] In addition, the inventors found that the cross-sectional area of ​​the longitudinal beams (left and right longitudinal beams) of the existing front subframe is relatively small, and in order to maintain the rigidity of the connection with the longitudinal beams of the vehicle body, the front end of the longitudinal beam of the subframe needs to be arranged at an acute angle with the longitudinal beam of the vehicle body. As a result, the front part of the entire longitudinal beam of the front subframe is not crushed during the collision, and the front section of the longitudinal beam of the vehicle body is pulled to bend toward the passenger compartment, causing a large deformation of the passenger compartment, which is not conducive to the protection of the occupants in the vehicle. Summary of the invention

[0005] In view of the problems existing in the prior art, the present invention provides a subframe reinforcement plate with a welded connection structure, an installation method and a subframe. By improving the local structural design of the subframe and arranging a weld connection structure on the subframe reinforcement plate, the local stress of the weld can be significantly reduced, and the reliability and mileage of the subframe can be improved, as well as the modal and stiffness performance.

[0006] The technical solution of the present invention is as follows:

[0007] In a first aspect of the present invention, a subframe reinforcement plate with a welding connection structure is provided, comprising: two subframe longitudinal beam upper plates and one subframe front cross beam upper plate, wherein the two subframe longitudinal beam upper plates are respectively connected to the two ends of the subframe front cross beam upper plate by means of a welding connection structure; the subframe longitudinal beam upper plates and the subframe front cross beam upper plates have overlapping surfaces at the connection positions, and the connection positions are connected by welding.

[0008] In some embodiments of the present invention, the welded connection structure includes a welding surface provided on an upper plate of a longitudinal beam of the subframe and a welding line provided on an upper plate of a front cross beam of the subframe;

[0009] The welding surface includes the longitudinal beam upper plate side surface, the longitudinal beam upper plate chamfered surface and the longitudinal beam upper plate top surface which are connected in sequence;

[0010] The welding lines include side welding lines, rounded corner welding lines and top surface welding lines which are connected in sequence.

[0011] In some embodiments of the present invention, the side surface of the longitudinal beam upper plate is connected to the side surface welding line by welding, the rounded corner surface of the longitudinal beam upper plate is connected to the rounded corner welding line by welding, and the top surface of the longitudinal beam upper plate is connected to the top surface welding line.

[0012] In some embodiments of the present invention, the side surface of the longitudinal beam upper plate and the top surface of the longitudinal beam upper plate are respectively arranged perpendicular to the rounded corner surface of the longitudinal beam upper plate;

[0013] The side welding line and the top welding line are respectively arranged perpendicular to the rounded corner welding line.

[0014] In some embodiments of the present invention, the top surface welding line is arc-shaped, and the side edge of the top surface of the longitudinal beam upper plate is arc-shaped.

[0015] In some embodiments of the present invention, the sub-frame longitudinal beam upper plate and the sub-frame front cross beam upper plate are arranged at the front part of the sub-frame assembly.

[0016] In some embodiments of the present invention, the upper plate of the sub-frame longitudinal beam and the upper plate of the sub-frame front cross beam are both stamped and formed into an integral structure of high-strength steel.

[0017] In a second aspect of the present invention, a method for installing a subframe reinforcement plate having a welding connection structure is provided, comprising: welding two subframe longitudinal beam upper plates and one subframe front cross beam upper plate into an integrated structure through the welding connection structure to form a subframe reinforcement plate;

[0018] The subframe reinforcement plate is fixed to the crossbeam and longitudinal beam at the front of the subframe by means of a welding process.

[0019] In a third aspect of the present invention, a subframe is provided, comprising the subframe reinforcement plate with a welded connection structure as described in the first aspect, wherein a subframe front cross beam, a subframe middle cross beam, a subframe rear cross beam, a subframe front longitudinal beam and a subframe rear longitudinal beam are arranged on the subframe; the two ends of the subframe front cross beam and the subframe middle cross beam are connected via the subframe front longitudinal beam, and the two ends of the subframe middle cross beam and the subframe rear cross beam are connected via the subframe rear longitudinal beam; the subframe longitudinal beam upper plate is mounted on the subframe front longitudinal beam, and the subframe front cross beam upper plate is mounted on the subframe front cross beam.

[0020] In some embodiments of the present invention, the subframe is provided with a stabilizer bar mounting hole, a steering gear mounting hole, an engine suspension mounting hole and a vehicle body connection point.

[0021] One or more technical solutions of the present invention have the following beneficial effects:

[0022] (1) The subframe reinforcement plate with a welding connection structure provided by the present invention comprises two subframe longitudinal beam upper plates and one subframe front cross beam upper plate. The subframe longitudinal beam upper plates and the subframe front cross beam upper plates are connected by a weld connection structure. The design of the weld connection structure can significantly reduce the local stress of the weld, thereby improving the reliability and mileage of the subframe, as well as the modal and stiffness performance. Compared with the existing improvement of the overall structure of the subframe, the present invention only needs to optimize the welding of the local structure of the subframe to improve the performance of the subframe, and there is no need to re-set a new mold, which is low-cost and simple in structure.

[0023] (2) The subframe reinforcement plate with a welded connection structure provided by the present invention has an overlap surface between the subframe longitudinal beam upper plate and the subframe front cross beam upper plate, and the overlap surfaces of the two are connected by welding, and the welding line between the top surface of the longitudinal beam upper plate on the subframe longitudinal beam upper plate and the top surface of the subframe front cross beam upper plate is set to be an arc, and the connection length is increased by the direction of welding to enhance the strength performance.

[0024] (3) The subframe reinforcement plate with a welded connection structure provided by the present invention, the subframe longitudinal beam upper plate and the subframe front cross beam upper plate are stamped from high-strength steel, have a simple structure, are easy to stamp, and have strong versatility; the subframe longitudinal beam upper plate and the subframe front cross beam upper plate can be directly stamped using a stamping process according to the shape of the subframe, and the strength and rigidity of the subframe can be enhanced without changing the original structure of the subframe, and there is no need to set up a new mold, thereby reducing development costs.

[0025] (4) According to the installation method of the sub-frame reinforcement plate with a welding connection structure provided by the present invention, the processed sub-frame reinforcement plate can be directly installed on the sub-frame by bolts. The entire installation method is simple and easy to implement.

[0026] (5) The sub-frame provided by the present invention can effectively improve the strength performance of the sub-frame by designing the distribution of the cross beams and the longitudinal beams. Under the same sub-frame strength performance requirements, the thickness of the sub-frame, the upper plate of the sub-frame longitudinal beams and the upper plate of the front cross beam of the sub-frame can be reduced by designing the welding direction, thereby reducing weight and cost.

[0027] (6) The weld connection structure on the subframe reinforcement plate provided by the present invention can also be applied to the design of the stabilizer bar, steering gear, engine suspension mounting bracket and body welding on the subframe, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a sub-frame reinforcement plate with a welding connection structure according to Example 1 of the present invention;

[0029] Figure 2 This is a schematic structural diagram of an upper plate of a longitudinal beam of a sub-frame according to Embodiment 1 of the present invention;

[0030] Figure 3 This is a schematic structural diagram of an upper plate of a front cross beam of a sub-frame according to Embodiment 1 of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of the subframe assembly of Example 3 of the present invention.

[0032] In the figure: 1. upper plate of longitudinal beam of subframe; 101. side surface of upper plate of longitudinal beam; 102. rounded corner surface of upper plate of longitudinal beam; 103. top surface of upper plate of longitudinal beam; 2. upper plate of front cross beam of subframe; 201. side welding line; 202. rounded corner welding line; 203. top surface welding line; 3. subframe; 301. front cross beam of subframe; 302. middle cross beam of subframe; 303. rear cross beam of subframe; 304. front longitudinal beam of subframe; 305. rear longitudinal beam of subframe. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0034] Example 1

[0035] In a typical embodiment of the present invention, a subframe reinforcement plate having a welding connection structure is provided, such as Figure 1 As shown, it includes: two auxiliary frame longitudinal beam upper plates 1 and an auxiliary frame front cross beam upper plate 2, the two auxiliary frame longitudinal beam upper plates 1 are respectively connected to the two ends of the auxiliary frame front cross beam upper plate 2 through a welding connection structure; the auxiliary frame longitudinal beam upper plate 1 and the auxiliary frame front cross beam upper plate 2 have an overlap surface at the connection position, and the connection position is connected by welding. Among them, the width of the overlap surface is 8-10mm, and a width of not less than 8mm can ensure the welding quality. If the width is too large, although the welding quality can be guaranteed, it will increase the weight, resulting in an increase in weight and cost.

[0036] In this embodiment, the welding connection structure includes a welding surface arranged on the upper plate 1 of the sub-frame longitudinal beam and a welding line arranged on the upper plate 2 of the sub-frame front cross beam. The upper plate of the sub-frame longitudinal beam and the upper plate of the sub-frame front cross beam are welded together by welding the welding surface and the welding line.

[0037] like Figure 2 As shown, the welding surface includes a longitudinal beam upper plate side surface 101, a longitudinal beam upper plate chamfered surface 102 and a longitudinal beam upper plate top surface 103 which are connected in sequence, and the longitudinal beam upper plate side surface 101 and the longitudinal beam upper plate top surface 103 are respectively arranged perpendicular to the longitudinal beam upper plate chamfered surface 102, so that the longitudinal beam upper plate side surface 101, the longitudinal beam upper plate chamfered surface 102 and the longitudinal beam upper plate top surface 103 form an L-shaped structure to clamp the sub-frame longitudinal beam upper plate 1 on the sub-frame longitudinal beam.

[0038] like Figure 3 As shown, the welding line includes a side welding line 201, a chamfered corner welding line 202 and a top surface welding line 203 which are connected in sequence. The side welding line 201 and the top surface welding line 203 are respectively arranged perpendicular to the chamfered corner welding line 202, so that the shape of the welding line matches the shape of the welding surface to realize the connection between the welding surface and the welding line.

[0039] Specifically, when the welding surface and the welding line are connected, the longitudinal beam upper plate side surface 101 and the side welding line 201 are welded together, the longitudinal beam upper plate chamfered surface 102 and the chamfered welding line 202 are welded together, and the longitudinal beam upper plate top surface 103 and the top surface welding line 203 are connected.

[0040] In this embodiment, the top surface welding line 203 is arc-shaped, and the side of the top surface 103 of the longitudinal beam upper plate is arc-shaped. By setting the top surface welding line of the front cross beam of the sub-frame to be arc-shaped, the distance between two equal points will be longer than that of a straight line. The length of the weld can be significantly increased, and the arc stress is more uniform and smaller under the same force. Since the distance between the two points is longer, the overlap length of the components is increased, and the stiffness and modal performance of the local structure of the sub-frame assembly are also improved.

[0041] Taking into account that the subframe is deformed due to limited strength when the front part of the subframe collides, the subframe longitudinal beam upper plate and the subframe front cross beam upper plate of the subframe reinforcement plate provided in this embodiment are arranged at the front part of the subframe assembly, which can improve the strength of the front end of the subframe and reduce the deformation of the subframe when a collision occurs.

[0042] In this embodiment, the sub-frame longitudinal beam upper plate 1 and the sub-frame front cross beam upper plate 2 are both stamped into an integrated structure of high-strength steel, and the sub-frame longitudinal beam upper plate 1 and the sub-frame front cross beam upper plate are stamped according to the front end shape of the installed sub-frame.

[0043] The subframe reinforcement plate with a welding connection structure provided in this embodiment can be directly installed on the front part of the subframe, thereby improving the strength and rigidity of the front part of the subframe. At the same time, the subframe reinforcement plate is divided into two subframe longitudinal beam upper plates and one subframe front cross beam upper plate. The subframe longitudinal beam upper plates and the subframe front cross beam upper plates are welded together through a welding connection structure. The design of the weld can significantly reduce the local stress of the weld, thereby improving the reliability and service mileage of the subframe, as well as the modal and rigidity performance.

[0044] The subframe reinforcement plate with a welded connection structure provided in this embodiment can be directly stamped using a stamping process according to the shape of the subframe. The strength and rigidity of the subframe can be enhanced without changing the original structure of the subframe, and there is no need to set up a new mold, thereby reducing development costs.

[0045] Example 2

[0046] This embodiment provides a method for installing a subframe reinforcement plate with a welding connection structure, comprising: welding two subframe longitudinal beam upper plates and a subframe front cross beam upper plate into an integrated structure through the welding connection structure to form a subframe reinforcement plate;

[0047] The subframe reinforcement plate is fixed to the crossbeam and longitudinal beam at the front of the subframe by means of a welding process.

[0048] In this embodiment, the processed auxiliary frame reinforcement plate can be directly installed on the auxiliary frame, and the entire installation method is simple and easy to implement.

[0049] Example 3

[0050] In a typical embodiment of the present invention, a subframe is provided, including a subframe reinforcement plate with a welded connection structure of Example 1, and a subframe front crossbeam 301, a subframe middle crossbeam 302, a subframe rear crossbeam 303, a subframe front longitudinal beam 304 and a subframe rear longitudinal beam 305 are arranged on the subframe; the two ends of the subframe front crossbeam 301 and the subframe middle crossbeam 302 are connected by the subframe front longitudinal beam 304, and the two ends of the subframe middle crossbeam 302 and the subframe rear crossbeam 303 are connected by the subframe rear longitudinal beam 305; the connected subframe forms a Japanese-shaped structure, the subframe longitudinal beam upper plate 1 is installed on the subframe front longitudinal beam 304, and the subframe front crossbeam upper plate 2 is installed on the subframe front crossbeam 301.

[0051] In this embodiment, the subframe is provided with stabilizer bar mounting holes, steering gear mounting holes, engine suspension mounting holes and body connection points. These mounting holes and connection points are designed on the longitudinal beams and cross beams of the subframe, and their specific positions can be set as needed.

[0052] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A subframe reinforcement plate with a welding connection structure, characterized in that: include: Two auxiliary frame longitudinal beam upper plates and one auxiliary frame front cross beam upper plate, the two auxiliary frame longitudinal beam upper plates are respectively connected to the two ends of the auxiliary frame front cross beam upper plate through welding connection structures; the auxiliary frame longitudinal beam upper plates and the auxiliary frame front cross beam upper plates have overlapping surfaces at the connection positions, and the connection positions are connected by welding.

2. The subframe reinforcement plate with a welding connection structure according to claim 1, characterized in that: The welding connection structure includes a welding surface arranged on the upper plate of the auxiliary frame longitudinal beam and a welding line arranged on the upper plate of the auxiliary frame front cross beam; The welding surface includes the longitudinal beam upper plate side surface, the longitudinal beam upper plate chamfered surface and the longitudinal beam upper plate top surface which are connected in sequence; The welding lines include side welding lines, rounded corner welding lines and top surface welding lines which are connected in sequence.

3. The subframe reinforcement plate with a welding connection structure as claimed in claim 2, characterized in that: The side surface of the longitudinal beam upper plate is connected to the side surface welding line by welding, the rounded corner surface of the longitudinal beam upper plate is connected to the rounded corner welding line by welding, and the top surface of the longitudinal beam upper plate is connected to the top surface welding line.

4. The subframe reinforcement plate with a welding connection structure as claimed in claim 2, characterized in that: The side surface of the longitudinal beam upper plate and the top surface of the longitudinal beam upper plate are respectively arranged perpendicular to the rounded corner surface of the longitudinal beam upper plate; The side welding line and the top welding line are respectively arranged perpendicular to the rounded corner welding line.

5. The subframe reinforcement plate with a welding connection structure as claimed in claim 2, characterized in that: The top surface welding line is arc-shaped, and the side edge of the top surface of the longitudinal beam upper plate is arc-shaped.

6. The subframe reinforcement plate with a welding connection structure according to claim 1, characterized in that: The auxiliary frame longitudinal beam upper plate and the auxiliary frame front cross beam upper plate are arranged at the front part of the auxiliary frame assembly.

7. The subframe reinforcement plate with a welding connection structure according to claim 1, characterized in that: The auxiliary frame longitudinal beam upper plate and the auxiliary frame front cross beam upper plate are both stamped and formed into an integral structure with high-strength steel.

8. A method for installing a subframe reinforcement plate with a welding connection structure according to any one of claims 1 to 7, characterized in that: include: Two auxiliary frame longitudinal beam upper plates and one auxiliary frame front cross beam upper plate are welded together into an integrated structure through a welding connection structure to form an auxiliary frame reinforcement plate; The subframe reinforcement plate is fixed to the crossbeam and longitudinal beam at the front of the subframe by means of a welding process.

9. A sub-frame, comprising the sub-frame reinforcement plate with a welding connection structure as claimed in any one of claims 1 to 7, characterized in that: The subframe is provided with a subframe front crossbeam, a subframe middle crossbeam, a subframe rear crossbeam, a subframe front longitudinal beam and a subframe rear longitudinal beam; the two ends of the subframe front crossbeam and the subframe middle crossbeam are connected through the subframe front longitudinal beam, and the two ends of the subframe middle crossbeam and the subframe rear crossbeam are connected through the subframe rear longitudinal beam; the subframe longitudinal beam upper plate is installed on the subframe front longitudinal beam, and the subframe front crossbeam upper plate is installed on the subframe front crossbeam.

10. The subframe according to claim 9, characterized in that: The auxiliary frame is provided with a stabilizer bar mounting hole, a steering gear mounting hole, an engine suspension mounting hole and a vehicle body connection point.

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