CN205009912U - Adoption chassis torsion beam that thick plate was made that varies - Google Patents

Abstract

The utility model discloses an adoption chassis torsion beam that thick plate was made that varies belongs to vehicle chassis suspension system, and it is including horizontal crossbeam in the overall width direction, the part is described for the channel bar that the cross -section is U -shaped, V -arrangement or rectangle to the crossbeam, at two longitudinal walls that are fixed with of the mutual symmetry in crossbeam both ends, the crossbeam adopts the thick plate that varies to make, and this crossbeam is the setting of arc structure, and it is regional that its both sides are the gaff, the middle little stress region that is, and the board type of crossbeam is sunken to the middle part by both sides to both sides are the arc with the junction at middle part, and the regional board thickness of above -mentioned gaff will be greater than the thick at least 2mm of the regional board of above -mentioned little stress.

Description

A chassis torsion beam made of unequal thickness plates

technical field

The utility model relates to a chassis torsion beam, in particular to a chassis torsion beam made of unequal thickness plates, which increases the deformation and yield strength of the original torsion beam and improves product safety. At the same time, it also reduces the difficulty of product processing and reduces the overall quality, which is more in line with the needs of automotive lightweight processing.

Background technique

The torsion beam, also known as the torsion beam, is set on the chassis suspension of the car, and its two ends are respectively connected to a wheel. It is mainly used to balance the up and down jump of the left and right wheels, so as to reduce the shaking of the vehicle and keep the vehicle stable.

In the prior art, plates with equal wall thickness are usually used to manufacture torsion beams. The specific forming methods include stamping forming or internal high pressure forming. The company has disclosed a method for stamping the torsion beam of pipe fittings, which includes the following steps: 1) Determine the structural characteristics of the torsion beam of pipe fittings, and divide the torsion beam of pipe fittings from the middle to both ends into three areas: the middle section, the transition section and the end. And select the characteristic section for each area, and obtain the characteristic section line according to the characteristic section, that is, V shape, U shape, rectangle, and design the upper and lower dies of the stamping die based on this; The area is formed by step-by-step stamping forming method of 2 to 5 passes. During the forming process of the transition section, a mandrel is inserted into the transition section area, and the outline size of the mandrel is smaller than the characteristic section of the transition section; 3) Plastic processing is performed on the end of the pipe fitting , the shaping die is inserted into the pipe fitting between the upper and lower dies of the stamping die. The shape and size of the front part of the shaping die are basically the same as the shape and size of the transition section and end of the finished torsion beam, so as to shape the fillet and profile of the end of the pipe fitting , so as to achieve the predetermined torsion beam profile.

Another example is in the Chinese invention patent No. 201410705725.0, the applicant Xi’an Jiaotong University discloses a low-pressure internal high-pressure forming device for torsion beams, including a torsion beam internal high-pressure forming die, a dual-motor driven servo pressure control device and a liquid filling device. The circuit and the liquid filling circuit are respectively connected with the torsion beam forming mold and the servo pressure control device driven by dual motors through the high-pressure pipeline. The high pressure forming mold in the torsion beam includes an upper mold and a lower mold, and the servo pressure control device driven by dual motors includes a pressure cylinder. , the piston rod in the pressure cylinder is connected to the sliding plate, two straight rods pass through the sliding plate, two ball screw nuts are connected to the sliding plate, and the servo motor is connected to the ball screw. The utility model belongs to the "passive internal high pressure forming ", no ultra-high pressure source is required to provide ultra-high pressure, the liquid pressure inside the pipe is generated by the downward movement of the mold and the sealing of the liquid inside the pipe, which reduces the requirements for high-pressure power sources and reduces the difficulty of the process.

The torsion part of the torsion beam on both sides has the requirement of torsional rigidity. To meet this requirement, a certain wall thickness must be achieved at the torsion part, but other parts do not actually need so much wall thickness, but if the existing several This process is used to manufacture the torsion beam. After it is formed, the wall thickness of each part is equal, which increases the difficulty of processing and installation (inner high pressure forming requires greater clamping force), and also increases The weight of the entire torsion beam is reduced, which is not in line with the lightweight trend of the automotive industry.

Utility model content

The technical problem to be solved by the utility model is to provide a chassis torsion beam made of unequal thickness plates, which reduces the processing difficulty of the product on the basis of ensuring the original torsional rigidity. The overall quality is more in line with the needs of automotive lightweight processing.

In order to achieve the above object, the utility model provides the following technical solutions:

A chassis torsion beam made of unequal thickness plates, which belongs to the suspension system of the automobile chassis, includes a crossbeam placed across the vehicle width direction, and the crossbeam is in the shape of a U-shaped, V-shaped or rectangular groove rod There are two longitudinal arms fixed symmetrically to each other at both ends of the beam, and its characteristics are as follows:

The crossbeam is made of unequal thick plates, and the crossbeam is arranged in an arc-shaped structure, with large stress areas on both sides and small stress areas in the middle. The junction is arc-shaped, and the plate thickness of the above-mentioned large stress area is at least 2mm greater than that of the above-mentioned small stress area, and at least one lightening hole is opened on the beam, which can further reduce the overall weight.

Compared with the prior art, the utility model has the advantages that the strength of the plate can be increased while the overall mass is reduced, and the overall mass of the automobile can be reduced while improving the safety and stability of the automobile.

Description of drawings

Fig. 1 is the structural representation of conventional torsion beam product in the utility model embodiment;

Fig. 2 is the structural representation of the torsion beam whose overall thickness is 1mm in the embodiment of the present invention;

Fig. 3 is a schematic diagram of the structure of the torsion beam partially thickened by 2mm in the embodiment of the utility model.

detailed description

The utility model will be described in further detail below in conjunction with the accompanying drawings.

As shown in Figure 3, this embodiment is a chassis torsion beam made of unequal thickness plates, which belongs to the chassis suspension system of an automobile. U-shaped, V-shaped or rectangular groove rod-shaped components, two longitudinal arms (not shown in the figure) are fixed symmetrically at both ends of the beam. The beam is made of unequal thickness plates, and the beam is arc-shaped Structural settings, its two sides are large stress area 2, the middle is small stress area 3, the plate shape of the beam is concave from both sides to the middle, and the joint between the two sides and the middle is arc-shaped, the plate thickness of the above-mentioned large stress area should be The thickness of the plate is at least 2mm greater than that of the above-mentioned small stress area, and a plurality of lightening holes 4 are opened on the beam, which can further reduce the overall weight.

As shown in Figure 1, the torsion beam is a conventional product without section thickening, and its mass is 9.337Kg at this time,

In order to enhance the deformation and yield strength of the torsion beam, it needs to be thickened. If the current general overall thickening method is adopted, as shown in Figure 2, after the overall thickness is 1MM, the mass of the torsion beam reaches 12.35Kg.

If the unequal thickness plate of the present invention is used to manufacture the torsion beam, as shown in Figure 3, the local thickening of 2mm in the large stress area, the plate in the small stress area does not thicken, at this time, the overall quality of the plate is 11.08Kg.

It can be seen that when the section is thickened by 2mm, the overall quality of the plate is smaller than that of the overall thickness of 1mm, and at this time, the strength of the large stress area is much greater than that of the overall thickening of 1mm due to the thickening of 2mm. The strength of the sheet. Therefore, the advantage of adopting the torsion beam of the utility model is that the strength of the plate can be increased while the overall mass is reduced, and the overall mass of the automobile can be reduced while improving the safety and stability of the automobile.

In order to manufacture the torsion beams with unequal thickness plates mentioned above, the following processes can be used:

1. Thermoforming, that is, firstly heat-treat the sheet (pipe) at high temperature, then roll it into a plate shape with unequal thickness, and then cool it to obtain a plate with unequal thickness. This forming process can accurately control the shape of each part. The wall is thick, but the cost is high, and it is time-consuming, so it is not suitable for mass production of torsion beams;

2. Adopt special unequal plate thickness rolling mill for cold rolling forming process. Its main principle is to use the height difference between the rolls, so that the surface of the rolled plate is also correspondingly formed with different thicknesses. Finally, the strip rolled by the unequal thickness rolling mill is welded by high-frequency welding to form a tube. This forming method is low in cost and high in work efficiency, and is suitable for mass production.

The above descriptions are only preferred implementations of the present utility model, and the protection scope of the present utility model is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present utility model all belong to the protection scope of the present utility model. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims (2)

1. A chassis torsion beam made of unequal thickness plates belongs to the chassis suspension system of an automobile, and it includes a crossbeam placed horizontally in the vehicle width direction, and the crossbeam is a U-shaped, V-shaped or rectangular groove in cross section Rod-shaped parts, two longitudinal arms are fixed symmetrically at both ends of the beam, and its characteristics are: The crossbeam is made of unequal thick plates, and the crossbeam is arranged in an arc-shaped structure, with large stress areas on both sides and small stress areas in the middle. The junction is arc-shaped, and the plate thickness of the above-mentioned large stress area is greater than the plate thickness of the above-mentioned small stress area by at least 2mm. 2. The chassis torsion beam according to claim 1, characterized in that: at least one lightening hole is opened on the cross beam.