Novel hydraulic pipe closed rear torsion beam

Abstract

This invention relates to the field of automobile chassis and discloses a novel hydraulic pipe-enclosed torsion beam. The torsion beam is a strip structure formed by hydraulic pipes, including a front side (1), a rear side (2), an outer side (3), and an inner side (4). The front side (1) and the rear side (2) are symmetrically distributed on the front and rear sides of the upper side with the same shape. A groove is formed on the inner side of the torsion beam, and the inner side (4) is a concave surface. The spline curve (5) of the inner side (4) is symmetrically arranged from the midpoint to both sides. Each spline curve (5) includes two segments, with the curvature of the end curve segment being greater than that of the middle curve segment. The tension between the end curve segment and the middle curve segment is 1. The spline curve (5) extends from the lower side of the end to the upper side of the middle. This torsion beam avoids stress concentration problems and has a longer service life through spline curve design.

Description

Technical Field

[0001] This invention relates to the field of automobile chassis, and mainly to a novel hydraulically sealed rear torsion beam. Background Technology

[0002] The torsion beam is a commonly used type of automotive suspension. It mainly uses a torsion beam to balance the vertical movement of the left and right wheels, and shock absorbers are installed on its side beams to connect to the shock absorber linkages to reduce vehicle sway and maintain vehicle stability. Its basic structure consists of a torsion beam and trailing arms welded together at both ends.

[0003] Chinese patent CN218929128U discloses a hydraulic pipe rear torsion beam with stress concentration, which uses a longitudinal arm structure design to absorb stress. However, it does not effectively solve the problem of stress concentration in the crossbeam. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies by providing a novel torsion beam with a closed hydraulic pipe and its assembly method.

[0005] A novel hydraulic pipe-sealed torsion beam is disclosed. The torsion beam is a strip-shaped structure formed from the hydraulic pipe, including a front side, a rear side, an outer side, and an inner side. The front and rear sides are symmetrically distributed with the same shape on the front and rear sides of the upper side. A groove is formed on the inner side of the torsion beam, and the inner side is a concave surface. The spline curves on the inner side are symmetrically arranged from the midpoint to both sides. Each spline curve includes two segments. The curvature of the end curve segment is greater than that of the middle curve segment. The tension between the end curve segment and the middle curve segment is 1. The spline curve extends from the lower side of the end to the upper side of the middle.

[0006] Preferably, the length of the end curve segment is half the length of the middle curve segment, and the slope of the middle curve segment near the midpoint is 0.

[0007] Preferably, the middle part of the outer side is the first surface, and the two sides are the second surface. The first surface is arched, and the second surface is flat. The junction of the first surface and the second surface is a smooth transition. The width of the second surface is narrower near the middle and wider near the ends.

[0008] Preferably, the front side is an outwardly inclined arc surface, the distance between the top of the outer side and the inner side gradually decreases from the end to the middle, and the distance between the middle area of ​​the front side and the middle area of ​​the front side of the inner side gradually decreases from the end to the middle.

[0009] Preferably, the front side end face and the lower front side of the inner side face are rounded and form a teardrop shape with a smaller top and a larger bottom cross-section.

[0010] Preferably, the longitudinal section of the torsion beam is a ">" shape with the pointed end facing upwards, which includes an outer layer formed by the front side, the rear side, and the outer side, as well as an inner layer formed by the inner side.

[0011] Preferably, the trajectory of the spline curve is the trajectory of the inner surface top surface.

[0012] Compared with existing technologies, this solution has the following advantages: The torsion beam structure in this solution is a tubular structure, which can provide reliable support. At the same time, by adjusting the curvature tension inside the inner curved surface, a new curve is established, changing the surface shape and stress distribution, thereby reducing local fatigue damage. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure.

[0014] Figure 2 yes Figure 1 Top view.

[0015] Figure 3 for Figure 2 A sectional view.

[0016] Figure 4 for Figure 2 A sectional view.

[0017] Figure 5 for Figure 2 A sectional view.

[0018] The technical names of the reference numerals in the figure are: 1—front side, 2—rear side, 3—outer side, 4—inner side, 5—spline curve, 6—first surface, 7—second surface, 8—teardrop shape, 9—outer layer, 10—inner layer. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0020] Example 1

[0021] A novel hydraulic pipe-sealed torsion beam is disclosed. The torsion beam is a strip-shaped structure formed from a hydraulic pipe, including a front side 1, a rear side 2, an outer side 3, and an inner side 4. The front side 1 and the rear side 2 are symmetrically distributed on the front and rear sides of the upper side. A groove is formed on the inner side of the torsion beam, and the inner side 4 is a concave surface. The spline curves 5 of the inner side 4 are symmetrically arranged from the midpoint to both sides. Each spline curve 5 consists of two segments, with the curvature of the end segment being greater than that of the middle segment. The tension between the end segment and the middle segment is 1. The spline curve 5 extends from the lower side of the end to the upper side of the middle. In this embodiment, the design of the spline curve 5 ensures that it meets the stress design requirements, ensuring that the stress distribution is concentrated at both ends, and that the stress in the middle can be promptly transferred to both ends. Furthermore, the overall cross-section and the side cross-sections are triangular structures.

[0022] The length of the end curve segment is half the length of the middle curve segment, and the slope of the middle curve segment near the midpoint is 0. This structural design ensures the stability of the entire torsion beam structure, and the stress distribution has been redesigned.

[0023] In this embodiment, the middle portion of the outer surface 3 is the first surface 6, and the two sides are the second surfaces 7. The first surface 6 is arched, and the second surface 7 is planar. The junction of the first surface 6 and the second surface 7 is a smooth transition. The width of the second surface 7 is narrower near the middle and wider near the ends. This structural design can better distribute stress to both ends, thereby achieving stress redistribution.

[0024] The front side 1 is an outwardly inclined arc surface. The distance between the outer side 3 and the top of the inner side 4 gradually decreases from the end to the middle. The distance between the middle area of ​​the front side 1 and the middle area of ​​the front side of the inner side 4 also gradually decreases from the end to the middle. Specifically, the end face of the front side 1 and the lower front end of the inner side 4 are rounded and form a teardrop shape 8 with a smaller top and a larger bottom.

[0025] In this design, the longitudinal section of the torsion beam is a ">" shape with the pointed end facing upwards. It includes an outer layer 9 formed by the front side 1, the rear side 2, and the outer side 3, as well as an inner layer 10 formed by the inner side 4. The double-layer structure design can better match the stress distribution. The trajectory of the spline curve 5 is the trajectory of the top surface of the inner side 4.

[0026] The torsion beam structure in this design is a tubular structure, which provides reliable support. At the same time, by adjusting the curvature tension inside the inner curved surface, a new curve is established, changing the surface shape and stress distribution, thereby reducing local fatigue damage.

[0027] Example 2

[0028] The difference between this embodiment and Embodiment 1 is that the torsion beam has longitudinal welding arms at both ends.

[0029] Example 3

[0030] The vehicle uses the torsion beam described in Example 1 or 2.

Claims

1. A novel torsion beam with a closed hydraulic pipe, characterized in that: The torsion beam is a strip structure formed by hydraulic tubes, including a front side (1), a rear side (2), an outer side (3), and an inner side (4). The front side (1) and the rear side (2) are symmetrically distributed on the front and rear sides of the upper side. The inner side of the torsion beam forms a groove, and the inner side (4) is a concave surface. The spline curve (5) of the inner side (4) is symmetrically set from the midpoint to both sides. Each spline curve (5) includes two segments. The curvature of the end curve segment is greater than that of the middle curve segment. The tension between the end curve segment and the middle curve segment is 1. The spline curve (5) extends from the lower side of the end to the upper side of the middle.

2. The novel hydraulic pipe-sealed torsion beam according to claim 1, characterized in that: The length of the end curve segment is half the length of the middle curve segment, and the slope of the middle curve segment near the midpoint is 0.

3. The novel hydraulic pipe-sealed torsion beam according to claim 2, characterized in that: The middle part of the outer side (3) is the first surface (6), and the two sides are the second surface (7). The first surface (6) is arched, and the second surface (7) is flat. The junction of the first surface (6) and the second surface (7) is a smooth transition. The width of the second surface (7) is narrow near the middle and wide near the end.

4. A novel hydraulic pipe-sealed torsion beam according to claim 2, characterized in that: The front side (1) is an arc surface that slopes outward as a whole. The distance between the outer side (3) and the top of the inner side (4) gradually decreases from the end to the middle. The distance between the middle area of ​​the front side (1) and the middle area of ​​the front side of the inner side (4) gradually decreases from the end to the middle.

5. A novel hydraulic pipe-sealed torsion beam according to claim 2, characterized in that: The front side (1) end face and the inner side (4) front side lower end are rounded and form a teardrop shape with a smaller top and a larger bottom (8).

6. A novel hydraulic pipe-sealed torsion beam according to claim 2, characterized in that: The longitudinal section of the torsion beam is a ">" shape with the pointed end facing upwards. It includes an outer layer (9) formed by the front side (1), the rear side (2) and the outer side (3), and an inner layer (10) formed by the inner side (4).

7. A novel hydraulic pipe-sealed torsion beam according to claim 1, characterized in that: The trajectory of spline curve (5) is the trajectory of the top surface of the inner side (4).

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