Hollow stabilizer bar

Abstract

A hollow stabilizer bar comprises a bar body, a pair of ends and a pair of transition sections connected between the two ends of the bar body and the ends respectively, the ends are of solid structures, the bar body and the transition sections are of hollow structures, and each transition section comprises a top wall, a bottom wall opposite to the top wall and two opposite side walls connected between the top wall and the bottom wall. Boundary lines between the top wall and the bottom wall of each transition section and the corresponding end are parabolas or arcs with openings facing the ends; the boundary lines of the two opposite side walls of each transition section and the corresponding ends are parabolas or arcs with openings facing the transition sections. The end socket is high in strength and good in durability under high stress.

Description

Technical Field

[0001] The utility model relates to an automobile stabilizer bar. Background Art

[0002] The stabilizer bar is a crucial component of the vehicle chassis, typically mounted on the subframe or mainframe. It plays a crucial role in ensuring the vehicle's lateral stability during driving. The stabilizer bar connects to other chassis components through the clamp and the end cap. The clamp is secured to the subframe or mainframe with specialized bolts and remains in a stable position during driving. The end cap is connected to components such as the shock absorber via a connecting rod or arm, and moves with the shock absorber's up-and-down motion during driving.

[0003] The rise of new energy vehicles has placed higher demands on vehicle lightweighting and stability. Regarding stabilizer bars, on the one hand, hollow stabilizer bars are being adopted by a large number of vehicles to meet the need for chassis weight reduction; on the other hand, to meet the requirements of vehicle stability and provide greater torsional rigidity, higher strength requirements are also being placed on the stabilizer bar end.

[0004] Currently, most hollow stabilizer bar manufacturers use end heat treatment to enhance the strength of hollow stabilizer bar ends. Specifically, after the stabilizer bar is formed, the end area is subjected to a special heat treatment to improve its strength. This method significantly improves end strength and can significantly alleviate the problem of premature end failure. However, for some hollow stabilizer bar products, the original wall thickness of the hollow stabilizer bar is too thin. The formed end and transition section are also thin due to the thickness of the tube. Furthermore, the stabilizer bar end is subject to very high loads. Even with heat treatment, the end still cannot meet the durability requirements under high stress. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide a hollow stabilizing rod with high end strength.

[0006] The hollow stabilizer rod of the embodiment of the present invention includes a rod body, a pair of end heads and a pair of transition sections respectively connected to the two ends of the rod body and the pair of end heads. The pair of end heads are both solid structures, and the rod body and the pair of transition sections are both hollow structures. Each transition section includes a top wall, a bottom wall opposite to the top wall and two opposite side walls connected between the top wall and the bottom wall. The intersection lines of the top wall and bottom wall of each transition section with the corresponding end heads are both parabolas or arcs with openings facing the end heads; the intersection lines of the opposite side walls of each transition section with the corresponding end heads are both parabolas or arcs with openings facing the transition sections.

[0007] The hollow stabilizer bar is characterized in that the top wall and the bottom wall are mirror-symmetrical in vertical direction, and the two opposite side walls are mirror-symmetrical in left-right direction.

[0008] In the hollow stabilizer bar, the top and bottom of each end are respectively provided with a first mounting plane and a second mounting plane, and each end is provided with a mounting through hole extending along the thickness direction of the end and passing through the first mounting plane and the second mounting plane.

[0009] In the above-mentioned hollow stabilizer rod, the top wall and the bottom wall of each transition section are perpendicular to the center line of the intersection line of the corresponding end head and intersect with the center axis of the mounting through hole.

[0010] The utility model has at least the following advantages:

[0011] In the embodiments of the present invention, the intersection lines between the top wall and the bottom wall of each transition section and the corresponding end head are parabolas or arcs with the openings facing the end heads, and the intersection lines between the opposite side walls of each transition section and the corresponding end heads are parabolas or arcs with the openings facing the transition section. This structure reduces the stress on the end heads and has a significant effect on improving the strength of the stabilizer rod end heads. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 and Figure 2 A schematic diagram of the three-dimensional structure and a schematic diagram of a top view of one end of a conventional hollow stabilizer bar are shown respectively.

[0013] Figure 3 and Figure 4 A three-dimensional structural schematic diagram and a top view schematic diagram of one end of a hollow stabilizer bar according to an embodiment of the present utility model are respectively shown.

[0014] Figure 5 A schematic cross-sectional view of one end of a hollow stabilizer bar according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0015] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 and Figure 2 The figures show a schematic three-dimensional structure and a top view of one end of a conventional hollow stabilizer rod. As shown, the conventional hollow stabilizer rod comprises a rod body 1a, a pair of end heads 2a, and a pair of transition sections 3a connected between the ends of the rod body 1a and the pair of end heads 2a. The pair of end heads 2a are both solid structures, while the rod body 1a and the pair of transition sections 3a are both hollow structures.

[0017] Since the structures of the pair of end heads of the hollow stabilizer bar are the same, the structures of the pair of transition sections are also the same. For the sake of simplicity, Figure 1 and Figure 2 Only the tip 2a and the transition section 3a at one end of the shaft 1a are shown.

[0018] The transition section 3a includes a top wall 31a, a bottom wall 32a opposite to the top wall 31a, and two opposite side walls connected between the top wall 31a and the bottom wall 32a (the opposite side walls include a left side wall 33a and a right side wall 34a). The top wall 31a and the bottom wall 32a are mirror-symmetrical in the upper and lower parts, and the opposite side walls are mirror-symmetrical in the left and right parts.

[0019] In the existing hollow stabilizer bar, the cross-sectional shape of the intersection between the transition section 3a and the end head 2a is roughly rectangular. In particular, the intersection line 311a between the top wall 31a of the transition section 3a and the end head 2a and the intersection line 311a between the bottom wall 32a and the end head 2a are both straight lines. It is easy to generate stress concentration at the intersection of the transition section and the end head, thereby reducing the durability of the end head under high stress.

[0020] Figure 3 and Figure 4 A three-dimensional structural schematic diagram and a top view schematic diagram of one end of a hollow stabilizer bar according to an embodiment of the present utility model are respectively shown. Figure 5 A cross-sectional schematic diagram of one end of a hollow stabilizer rod according to an embodiment of the present invention is shown. As shown, the hollow stabilizer rod comprises a rod body 1, a pair of end heads 2, and a pair of transition sections 3 connected between the ends of the rod body 1 and the pair of end heads 2, respectively. The pair of end heads 2 are both solid structures, while the rod body 1 and the pair of transition sections 3 are both hollow structures.

[0021] Since the structures of the pair of end heads of the hollow stabilizer bar are the same, the structures of the pair of transition sections are also the same. For the sake of simplicity, Figure 3 and Figure 4 Only the tip 2 and the transition section 3 at one end of the shaft 1 are shown.

[0022] The transition section 3 includes a top wall 31, a bottom wall 32 opposite to the top wall 31, and two opposite side walls connected between the top wall 31 and the bottom wall 32 (the opposite side walls include a left side wall 33 and a right side wall 34). The top wall 31 and the bottom wall 32 are mirror-symmetrical in the upper and lower parts, and the opposite side walls are mirror-symmetrical in the left and right parts.

[0023] Compared with the prior art, the main improvement of the embodiments of the present invention is that the intersection lines of the top wall 31 and the bottom wall 32 of each transition section 3 with the corresponding end head 2 are parabolas or arcs with the opening facing the end head 2; the intersection lines of the opposite side walls of each transition section 3 with the corresponding end head 2 are parabolas or arcs with the opening facing the transition section 3.

[0024] exist Figure 3 and Figure 4 In the example, the intersection line 311 between the top wall 31 of the transition section 3 and the end 2 is a parabola with an opening toward the end 2; the intersection line 341 between the right side wall 34 of the transition section and the end 2 is a parabola with an opening toward the transition section 3. The intersection line 311 and the intersection line 341 are connected in an S shape. Figure 3 and Figure 4Not shown, it can be seen from the upper and lower mirror symmetry of the top wall 31 and the bottom wall 32, and the left and right mirror symmetry of the opposite side walls that the intersection line of the bottom wall 32 of the transition section 3 and the end head 2 is a parabola with the opening toward the end head 2; the intersection line of the left side wall 33 of the transition section and the end head 2 is a parabola with the opening toward the transition section 3.

[0025] Please combine Figure 5 As shown. The top and bottom of the end cap 2 are respectively provided with a first mounting surface 21 and a second mounting surface 22. The end cap is provided with a mounting through-hole 23 extending along the thickness of the end cap and penetrating the first mounting surface 21 and the second mounting surface 22. The centerline X1 of the intersection 311 between the top wall 31 of the transition section 3 and the end cap 2, as well as the centerline (not shown) of the intersection between the bottom wall 32 and the end cap 2, are perpendicular and intersect at the central axis X2 of the mounting through-hole 23.

[0026] In another embodiment, the boundary line 311 between the top wall 31 of the transition section 3 and the end head 2 is an arc opening toward the end head 2 ; the boundary line 341 between the right side wall 34 of the transition section and the end head 2 is an arc opening toward the transition section 3 .

[0027] In another embodiment, the boundary line 311 between the top wall 31 of the transition section 3 and the end head 2 is a parabola opening toward the end head 2 ; the boundary line 341 between the right side wall 34 of the transition section and the end head 2 is an arc opening toward the transition section 3 .

[0028] In another embodiment, the boundary line 311 between the top wall 31 of the transition section 3 and the end head 2 is an arc opening toward the end head 2; the boundary line 341 between the right side wall 34 of the transition section and the end head 2 is a parabola opening toward the transition section 3.

[0029] In some specific implementations, the hollow stabilizer bar of this embodiment is made of 34MnB5 steel.

[0030] The embodiment of the utility model, on the basis of ensuring that the installation area of the stabilizer bar end head meets the requirements, sets the intersection lines of the top wall and bottom wall of each transition section with the corresponding end head as a parabola or arc with the opening facing the end head, and sets the intersection lines of the opposite side walls of each transition section with the corresponding end head as a parabola or arc with the opening facing the transition section, thereby avoiding stress concentration and reducing the stress of the stabilizer bar product end head, thereby improving the durability of the end head under high stress.

[0031] The above description is a further explanation of the present invention in conjunction with specific embodiments and the accompanying drawings. However, the present invention can obviously be implemented in a variety of other ways than those described herein, and those skilled in the art can generalize and deduce them based on actual usage without violating the scope of the present invention. Therefore, the content of the above specific embodiments should not limit the scope of protection of the present invention.

Claims

1. A hollow stabilizer rod, comprising a rod body, a pair of end heads, and a pair of transition sections respectively connected between the ends of the rod body and the pair of end heads, wherein the pair of end heads are both solid structures, the rod body and the pair of transition sections are both hollow structures, and each transition section includes a top wall, a bottom wall opposite to the top wall, and two opposite side walls connected between the top wall and the bottom wall, characterized in that: The intersection lines between the top wall and the bottom wall of each transition section and the corresponding end are parabolas or arcs with the openings facing the end; The boundary lines between the two opposite side walls of each transition section and the corresponding end head are both parabolas or arcs with openings facing the transition section.

2. The hollow stabilizer bar according to claim 1, characterized in that The top wall and the bottom wall are mirror-symmetrical in vertical direction, and the two opposite side walls are mirror-symmetrical in horizontal direction.

3. The hollow stabilizer bar according to claim 1, characterized in that The hollow stabilizer bar is made of 34MnB5 steel.

4. The hollow stabilizer bar according to claim 1, wherein: A first mounting plane and a second mounting plane are respectively provided on the top and the bottom of each end head. Each end head is provided with a mounting through hole extending along the thickness direction of the end head and passing through the first mounting plane and the second mounting plane.

5. The hollow stabilizer bar according to claim 4, characterized in that The top wall and the bottom wall of each transition section are perpendicular to the center line of the intersection line of the corresponding end head and intersect with the central axis of the installation through hole.

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