Rear lower swing arm bushing of electric vehicle
By adding inserts and designing a hollow and solid structure in the lower control arm bushing skeleton of the electric vehicle, the shortcomings of the bushing in torsional stiffness and vibration isolation performance are solved, achieving a high stiffness ratio and vibration isolation effect in different directions, and improving the handling performance of the whole vehicle.
Patent Information
- Application Number
- CN202520065319.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-10
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2035-01-10
AI Technical Summary
Existing electric vehicle lower control arm bushings are insufficient in terms of torsional stiffness and vibration isolation performance, especially in terms of stiffness ratio in the horizontal and vertical directions, which cannot meet the vibration isolation requirements in different directions.
Multiple inserts are added inside the bushing frame, and the structure is designed as hollow and solid in the vertical and horizontal directions. Different stiffness ratios are formed by the spacing between the inserts and the outer and inner tubes, as well as the combination of annular grooves and arc-shaped holes, to meet the vibration isolation requirements in different directions.
The torsional stiffness of the bushing was improved, enhancing the damping performance of torsional vibration, increasing the load-bearing capacity in the horizontal direction and the vibration isolation performance in the vertical direction, improving the handling performance of the whole vehicle, and ensuring the uniformity of the structure and the vibration isolation effect.
Smart Images
Figure CN223559437U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of automobile parts, specifically to a rear swing arm bushing of electric vehicle. BACKGROUND
[0002] The swing arm bushing is one of the chassis components of the electric vehicle, and it is very important, which can not only reduce equipment wear, but also effectively reduce vibration and noise during vehicle driving. The conventional front swing arm bushing is generally a skeleton bushing, which is formed by vulcanization of an inner tube, an outer tube and a rubber part, has large torsional stiffness and cannot realize large stiffness ratio in horizontal and vertical directions, and has general vibration isolation performance. SUMMARY
[0003] The utility model solves the technical problem, provides a skeleton in the middle increases a plurality of inserts, can reduce the torsional stiffness of the bushing, improves the performance of attenuating torsional vibration, and designs the bushing into a hollow and solid structure in the vertical and horizontal directions, which can provide a large stiffness ratio in the two directions.
[0004] The technical scheme of the utility model is to provide a rear swing arm bushing of electric vehicle with the following structure, which comprises an outer tube, an inner tube and a skeleton, the outer side wall of the skeleton is fixed with the inner wall of the outer tube, and the inner side wall is fixed with the outer side wall of the inner tube; characterized in that: a plurality of inserts are arranged in the skeleton, the plurality of inserts are located on the side wall of the same cylinder, and a spacing is arranged between the adjacent two inserts in the circumferential direction of the cylinder, and all the inserts have a spacing with the outer tube and the inner tube.
[0005] The skeleton is provided with a plurality of accommodating cavities consistent with the number of inserts, and each insert is embedded in the accommodating cavity and fixed.
[0006] The two end faces of the skeleton are provided with a first annular groove and a second annular groove, the first annular groove and the second annular groove are coaxial with the skeleton, the first annular groove is located on the inner side of the insert, and the second annular groove is located on the outer side of the insert.
[0007] The first annular groove of the end face of the skeleton is provided with a first arc-shaped hole penetrating through the two end faces, the second annular groove of the end face of the skeleton is provided with a second arc-shaped hole penetrating through the two end faces, a through hole is arranged between the first arc-shaped hole and the second arc-shaped hole, and the through hole communicates the first arc-shaped hole and the second arc-shaped hole.
[0008] The skeleton is provided with an inner ring and an outer ring, the height of the inner ring is consistent with the height of the inner tube and is tightly fitted on the outer wall of the inner tube, and the height of the outer ring is consistent with the height of the outer tube and is tightly fitted on the inner wall of the outer tube.
[0009] With the above structure, the present utility model has the following advantages: 1, on the basis of the skeleton structure, a plurality of semicircular middle inserts are added, the torsional stiffness of the bushing is reduced, and the performance of attenuating torsional vibration is improved; 2, and the bushing is designed into a hollow and solid structure in the vertical and horizontal directions, which can provide a large stiffness ratio in two directions, the high stiffness in the horizontal direction (solid direction) to bear a large impact load, which plays a role of rapid convergence, and the low stiffness in the vertical direction (hollow direction) to improve the vibration isolation performance; thereby the present application can meet different vibration isolation requirements in the vertical and horizontal directions. 3, the torsional vibration resistance of the bushing is improved, the horizontal bearing capacity and fatigue durability of the bushing are improved, the vertical vibration isolation performance of the bushing is improved, the handling performance of the whole vehicle is improved 4, the bushing is a symmetrical structure, thereby the structure is more uniform, which is conducive to stable vibration isolation. 5, the two rubber parts in the horizontal direction are not connected, thereby they can solve the vibration in the corresponding direction respectively, thereby mutual influence in the vibration isolation work is avoided as much as possible. BRIEF DESCRIPTION OF DRAWINGS
[0010] Figure 1 It is a sectional view of the rear lower swing arm bushing of the electric vehicle of the present utility model.
[0011] Figure 2 It is a sectional view of the rear lower swing arm bushing of the electric vehicle of the present utility model.
[0012] Figure 3 It is a sectional view of the rear lower swing arm bushing of the electric vehicle of the present utility model.
[0013] Figure 4 It is a sectional view of the rear lower swing arm bushing of the electric vehicle of the present utility model.
[0014] In the drawings:
[0015] 1, outer tube, 2, inner tube, 3, skeleton, 4, insert, 5, first annular groove, 6, second annular groove, 7, first arc-shaped hole, 8, second arc-shaped hole, 9, through hole. DETAILED DESCRIPTION
[0016] The present utility model will be further described below with reference to the drawings.
[0017] As Figures 1-4As shown, the utility model relates to a kind of electric vehicle rear lower swing arm bushing, including outer tube 1, inner tube 2 and framework 3, the outside wall of framework 3 is fixed with the inner wall of outer tube 1, inside wall is fixed with the outside wall of inner tube 2.The inside of framework 3 is equipped with multiple inserts 4, multiple inserts 4 are located in the side wall of same cylinder, two blocks in this embodiment, two blocks are arc structure, and the circumferential length thereof is less than 180 degrees, and two blocks are symmetrically arranged.The spacing is provided between the two adjacent inserts 4 in the circumferential direction of the cylinder, so that the spacing is between the side wall of two.
[0018] All inserts 4 have spacing with outer tube 1 and inner tube 2.The framework 3 is equipped with the accommodating cavity consistent with the number of inserts 4, and each insert 4 is embedded in the accommodating cavity and fixed.The inside and outside of accommodating cavity are solid structure, and framework 3 is generally made of rubber material, with good elasticity and reset.
[0019] As shown in Figure 2 And Figure 3 As shown, the end surface of framework 3 is equipped with first annular groove 5 and second annular groove 6, and first annular groove 5 and second annular groove 6 are coaxially arranged with framework 3, first annular groove 5 is located on the inside of insert 4, and second annular groove 6 is located on the outside of insert 4
[0020] As shown in Figure 4 The first annular groove 5 of the end surface of framework 3 is equipped with first arc-shaped hole 7 penetrating through both end surfaces, and the second annular groove 6 of the end surface of framework 3 is equipped with second arc-shaped hole 8 penetrating through both end surfaces, and through hole 9 is provided between first arc-shaped hole 7 and second arc-shaped hole 8, and through hole 9 communicates first arc-shaped hole 7 and second arc-shaped hole 8.
[0021] The framework 3 is equipped with inner ring and outer ring, the height of inner ring is consistent with the height of inner tube 2 and is tightly fitted on the outer wall of inner tube 2, and the height of outer ring is consistent with the height of outer tube 1 and is tightly fitted on the inner wall of outer tube 1.
[0022] As shown in Figure 4 As shown, hollow structure is designed in the vertical direction (Y axis direction of coordinate axis) of bushing, that is, hollow structure formed by first arc-shaped hole 7, second arc-shaped hole 8 and through hole 9, and the low stiffness of the structure improves the vibration isolation performance;And then the electric vehicle rear lower swing arm bushing can meet different vibration isolation requirements in vertical direction and horizontal direction.
[0023] Solid structure is designed in horizontal direction (X axis direction of coordinate axis), which can provide large stiffness ratio in two directions, and high stiffness in horizontal direction can bear large impact load, which plays a role of rapid convergence.
Claims
1. An electric vehicle rear lower swing arm bushing, comprising an outer tube (1), an inner tube (2) and a skeleton (3), the outer side wall of the skeleton (3) is fixed with the inner wall of the outer tube (1), and the inner side wall is fixed with the outer side wall of the inner tube (2); characterized in that: The skeleton (3) is internally provided with a plurality of inserts (4), each of which is located on the sidewall of a same cylinder, and the adjacent two inserts (4) are provided with a spacing in the circumferential direction of the cylinder, and all the inserts (4) are spaced apart from the outer tube (1) and the inner tube (2).
2. The electric vehicle rear lower swing arm bushing of claim 1, wherein: The skeleton (3) is provided with a number of accommodating cavities consistent with the number of inserts (4), and each insert (4) is embedded in the accommodating cavity and fixed.
3. The electric vehicle rear lower swing arm bushing of claim 1, wherein: The skeleton (3) is provided with a first annular groove (5) and a second annular groove (6) on the end face of the skeleton (3), the first annular groove (5) and the second annular groove (6) are coaxial with the skeleton (3), the first annular groove (5) is located on the inner side of the insert (4), and the second annular groove (6) is located on the outer side of the insert (4).
4. The electric vehicle rear lower swing arm bushing of claim 3, wherein: The first annular groove (5) of the end face of the skeleton (3) is provided with a first arc-shaped hole (7) penetrating through the two end faces, the second annular groove (6) of the end face of the skeleton (3) is provided with a second arc-shaped hole (8) penetrating through the two end faces, a through hole (9) is arranged between the first arc-shaped hole (7) and the second arc-shaped hole (8), and the through hole (9) communicates the first arc-shaped hole (7) and the second arc-shaped hole (8).
5. The electric vehicle rear swing arm bushing of claim 3, wherein: The skeleton (3) is provided with an inner ring and an outer ring, the height of the inner ring is consistent with the height of the inner tube (2) and is tightly fitted on the outer wall of the inner tube (2), and the height of the outer ring is consistent with the height of the outer tube (1) and is tightly fitted on the inner wall of the outer tube (1).