CN205202650U - Light -weighted back torsion roof beam - Google Patents

Abstract

The utility model discloses a light -weighted back torsion roof beam, including crossbeam, longitudinal wall, bearing, supporting spring seat and wheel hub mount pad, the longitudinal wall is the arc structure, and the top of longitudinal wall is connected with the bearing, and the bottom of longitudinal wall is connected with the wheel hub mount pad, and the cooperation setting that the supporting spring seat passes through the screw bolt and nut is on the longitudinal wall, the quantity of longitudinal wall is two, and two longitudinal walls symmetry sets up, and the distance between two longitudinal wall middle sections is less than two distances between the longitudinal wall top, the cross -section of crossbeam is the U -shaped structure, and the crossbeam includes entablature and bottom end rail, and the area of bottom end rail is greater than the area of entablature, and the both ends of crossbeam are connected with the longitudinal wall. The utility model discloses a go up bottom end rail area imbalance and curved longitudinal wall, under the circumstances of torsion -bar spring in the middle of not having, the torsion roof beam can fully be out of shape for torsion bar part commonly used in the back torsion roof beam assembly can be cancelled, reduces whole quality. Optimize the rigidity performance of back torsion roof beam to reduce manufacturing cost.

Description

A lightweight rear torsion beam

technical field

The utility model relates to the technical field of automobile suspension systems, in particular to a lightweight rear torsion beam.

Background technique

In the early days, the rear torsion beam, as the core component of the rear torsion beam suspension system, was responsible for the load bearing of the vehicle body and the torsion of the vehicle when driving on uneven roads. In order to avoid the deformation of parts and the fatigue effects of alternating loads, it is necessary to add a torsion bar spring in the middle position to increase the torsional stiffness of the rear suspension to ensure that no adverse effects such as rear axle fracture occur during actual driving. The obvious disadvantage of designing with intermediate torsion bars is that the design weight of the suspension system is increased, which is not conducive to lightweight requirements. Due to the long size of the middle torsion bar, it needs to be penetrated from one side and welded at both ends in the actual assembly manufacturing. The process arrangement in the manufacturing process is relatively difficult.

Utility model content

In order to solve the above technical problems, the utility model provides a lightweight rear torsion beam that does not need an intermediate torsion bar, has low manufacturing cost, and has good rigidity performance.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:

A lightweight rear torsion beam, comprising a cross beam, a trailing arm, a supporting seat, a supporting spring seat and a hub mounting seat, the longitudinal arm is an arc-shaped structure, the top end of the trailing arm is connected to the supporting seat, and the bottom end of the trailing arm It is connected with the hub mounting seat, and the support spring seat is set on the trailing arm through the cooperation of bolts and nuts; the number of the trailing arms is two, and the two trailing arms are arranged symmetrically. The distance between the middle sections of the two trailing arms Less than the distance between the top ends of the two longitudinal arms; the section of the cross beam is a U-shaped structure, the cross beam includes an upper cross beam and a lower cross beam, the area of the lower cross beam is larger than the area of the upper cross beam, and the two ends of the cross beam are connected with longitudinal arm.

The beneficial effect of the utility model is: the torsion beam can be fully deformed without the intermediate torsion bar spring through the unequal area of the upper and lower beams and the arc-shaped longitudinal arm, so that the torsion bar parts commonly used in the rear torsion beam assembly can be canceled , so that the overall mass of the assembly is reduced by more than 3kg, and the fuel economy of the vehicle and the efficiency of the use of electric energy are improved. Optimize the stiffness performance of the rear torsion beam and reduce manufacturing costs.

As a preferred structure of the present utility model, in order to improve the problem that the crossbeam breaks when it is twisted too much in actual use, the distance from the center of the crossbeam to the center of the hub mounting seat is greater than the distance from the center of the crossbeam to the center of the supporting seat. By reasonably arranging the position of the beam, the force of the beam in actual use can be balanced to avoid breaking when the torsion is too large.

As a preferred structure of the present utility model, in order to improve the problem that the upper beam and the lower beam cannot withstand greater torsion, the end faces of the upper beam and the lower beam are arc-shaped structures, and the width of the middle section of the upper beam and the lower beam is Less than the width of both sides of the upper beam and the lower beam. The end faces of the upper beam and the lower beam are arc-shaped structures to strengthen the bearing capacity of the upper and lower beams, so that both sides of the upper and lower beams can bear greater torsion.

As a preferred structure of the present invention, in order to improve the problem of low connection strength between the cross beam and the longitudinal arm, the middle section of the longitudinal arm is located between the upper cross beam and the lower cross beam and welded as a whole. In this way, through the welding of the longitudinal arm and the upper and lower beams as a whole, the connection strength of the welded part is strengthened, thereby ensuring the quality of the torsion beam.

As a preferred structure of the present invention, in order to improve the problem that the hub mounting seat cannot be accurately connected with the hub, the hub mounting seat includes a hub mounting positioning surface, and the hub mounting positioning surface is arranged on the outside of the longitudinal arm. By installing the positioning surface of the wheel hub, the installation accuracy of the torsion beam can be improved to ensure its stability.

Description of drawings

Fig. 1 is a structural schematic diagram of the lightweight rear torsion beam of the present invention.

Fig. 2 is a top view of the lightweight rear torsion beam of the present invention.

Label description:

1. Beam; 2. Longitudinal arm; 3. Support seat; 4. Support spring seat; 5. Wheel mounting seat.

detailed description

In order to describe the technical content, structural features, achieved goals and effects of the present utility model in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

Please refer to Fig. 1 and Fig. 2 together. As shown in the figure, the lightweight rear torsion beam of the present invention includes a beam 1, a longitudinal arm 2, a supporting seat 3, a supporting spring seat 4 and a hub mounting seat 5, and the longitudinal arm 2 It is an arc structure, the supporting seat 3 is connected with the top end of the trailing arm 2, the hub mounting seat 5 is connected with the bottom end of the trailing arm 2, the supporting spring seat 4 is arranged on the trailing arm 2 through the cooperation of bolts and nuts, and the supporting seat 3 is used for connecting with the vehicle body, the supporting spring seat 4 is used for installing the supporting spring, and the wheel hub mounting seat 5 is used for connecting with the wheel hub. The number of trailing arms 2 is two, and the two trailing arms 2 are mirror-symmetrically arranged, and the distance between the middle sections of the two trailing arms 2 is smaller than the distance between the top ends of the two trailing arms 2 . The cross-section of the beam 1 is a U-shaped structure. The beam 1 includes an upper beam and a lower beam. The area of the lower beam is larger than that of the upper beam. Both ends of the beam 1 are connected with longitudinal arms 2 . The end faces of the upper beam and the lower beam are arc-shaped, and the width of the middle section of the upper beam and the lower beam is smaller than the width of the two sides of the upper beam and the lower beam. The end faces of the upper beam and the lower beam are arc-shaped structures to strengthen the bearing capacity of the upper and lower beams, so that both sides of the upper and lower beams can bear greater torsion. Because the torsion beam will twist when the vehicle is driving on an uneven road, the traditional design often relies on the intermediate torsion bar spring to increase the stiffness. Because the upper side of the crossbeam 1 is subjected to a slightly greater force than the lower side when the torsion beam is torsionally moving, the utility model designs the crossbeam 1 connected in the middle as a structure in which the upper and lower sides are not aligned to ensure that there is no intermediate torsion bar spring. , can be fully deformed, avoiding the problem of excessive extrusion of the upper side material and cracking at the welded joint when the rear torsion beam is too large due to the cancellation of the middle torsion bar.

The middle section of the longitudinal arm 2 is located between the upper beam and the lower beam, and is welded as a whole. Through the arc structure of the upper and lower beams, the welding parts are further improved. At the same time, the connection strength of the welding parts is strengthened through the welding of the longitudinal arm 2 and the upper and lower beams, so that the beam 1 and the longitudinal arm 2 are firmly connected, thereby ensuring the quality of the torsion beam. . The distance from the center of the crossbeam 2 to the center of the hub mounting seat 5 is greater than the distance from the center of the crossbeam 2 to the center of the bearing seat 3 . By rationally arranging the position of the crossbeam 2, the stress on the crossbeam 2 in actual use can be balanced to avoid breaking when the torsion is too large. The hub installation seat 5 includes a hub installation positioning surface, and the hub installation positioning surface is arranged on the outer side of the trailing arm 2 . The mounting and positioning surface of the wheel hub is a smooth surface, through which the mounting accuracy of the torsion beam can be improved and its stability can be guaranteed.

During use, the hub mounting seat 5 is connected with the automobile wheel hub, the supporting seat 3 is connected with the vehicle body, the supporting spring is installed on the supporting spring seat 4, no intermediate torsion bar needs to be added in the crossbeam 1, and the crossbeam 1 and the longitudinal arm 2 are welded into a Integrated, reducing the assembly and welding production process of the torsion bar, and improving the production efficiency. The torsion beam is directly used as the rear suspension system of the automobile chassis. In the utility model, the cross beam 1 connected in the middle is designed as a structure in which the upper and lower sides are not aligned, so that it can be fully deformed without the middle torsion bar spring, and avoid excessive twisting of the rear torsion beam due to the cancellation of the middle torsion bar. A situation where the material on the upper side is squeezed occurs.

The above is only an embodiment of the utility model, and does not limit the patent scope of the utility model. Any equivalent shape or structural transformation made by using the specification of the utility model and the contents of the accompanying drawings, or directly or indirectly used in other related Technical fields are all included in the scope of patent protection of the utility model in the same way.

Claims (5)

1. torsion beam after a weight-saving, comprise crossbeam, trailing arm, supporting base, support spring seat and wheel hub mount, it is characterized in that: described trailing arm is arcuate structure, the top of trailing arm is connected with supporting base, the bottom of trailing arm is connected with wheel hub mount, and described support spring seat is equipped with on trailing arm by screw bolt and nut;

The quantity of described trailing arm is two, and two trailing arms are symmetrical arranged, and the distance between two trailing arm stage casings is less than the distance between two trailing arm tops;

The cross section of described crossbeam is U-shaped structure, and crossbeam comprises entablatrance and cross sill, and the area of described cross sill is greater than the area of entablatrance, and the two ends of described crossbeam are connected with trailing arm.

2. torsion beam after weight-saving according to claim 1, is characterized in that: the center of described crossbeam is greater than the distance of center to supporting base center of crossbeam to the distance at wheel hub mount center.

3. torsion beam after weight-saving according to claim 1, is characterized in that: the end face of described entablatrance and cross sill is arcuate structure, the width in described entablatrance and cross sill stage casing is less than the width of entablatrance and cross sill both sides.

4. torsion beam after weight-saving according to claim 3, is characterized in that: the stage casing of described trailing arm between entablatrance and cross sill, and is welded as a whole.

5. torsion beam after weight-saving according to claim 1, is characterized in that: described wheel hub mount comprises wheel hub and installs locating surface, and the outside that locating surface is arranged on trailing arm installed by described wheel hub.