Automobile swing arm with long service life

Abstract

The utility model relates to the technical field of automobile parts, in particular to an automobile swing arm with long service life, which comprises an automobile swing arm body, a first connecting arm and a second connecting arm are arranged on the automobile swing arm body, and bushings are arranged on the first connecting arm and the second connecting arm. The first connecting arm and the second connecting arm are each provided with an installation base for press fitting of the lining, an installation hole is formed in each installation base in a penetrating mode, the inner wall of each installation hole is arranged in a stepped reducing mode, and the hole diameter is gradually decreased from one end to the other end. The automobile swing arm has the advantages that the problem of stress concentration between the lining and the lining mounting hole can be solved, and the automobile swing arm is long in service life.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile parts, and specifically relates to a light-weight automobile swing arm. BACKGROUND

[0002] The automobile swing arm is a key component in the suspension system of an automobile, which connects the vehicle body and the wheel assembly, supports and fixes the wheels, and also bears the functions of shock absorption and steering control. The automobile swing arm is usually made of metal material and has certain strength and rigidity. The design and adjustment of the automobile swing arm have important influence on the performance and maneuverability of the suspension system.

[0003] The automobile swing arm bears the gravity and vibration during the driving of the vehicle. They may be worn and damaged, especially the connecting part between the bushing and the bushing mounting hole on the automobile swing arm. Due to the traditional single straight hole of the mounting hole, the stress is concentrated on the edge of the hole, especially the stress concentration easily occurs at the bushing pressing part during the stress, thereby causing fatigue cracks and reducing the service life of the swing arm. SUMMARY

[0004] The utility model solves the technical problem in the prior art, and provides a long-service-life automobile swing arm capable of solving the stress concentration between the bushing and the bushing mounting hole.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a long-service-life automobile swing arm, which comprises an automobile swing arm body, a first connecting arm and a second connecting arm are arranged on the automobile swing arm body, a bushing is arranged on the first connecting arm and the second connecting arm, characterized in that: a mounting seat for pressing the bushing is arranged on the first connecting arm and the second connecting arm, a mounting hole is arranged through the mounting seat, the inner wall of the mounting hole is arranged in a stepped variable-diameter mode, and the hole diameter gradually decreases from one end to the other end.

[0006] Compared with the fatigue cracks caused by the stress concentration between the bushing and the bushing mounting hole in the prior art, the utility model can disperse the stress, so that the stress is not concentrated, the occurrence of fatigue cracks is reduced, and the service life of the automobile swing arm is improved by arranging the inner wall of the mounting hole in a stepped variable-diameter mode.

[0007] The utility model further provides that: one end of the mounting hole is an inlet end, the other end is a terminal end, the inner wall of the mounting hole is sequentially provided with a first hole diameter, a second hole diameter and a third hole diameter along the direction from the inlet end to the terminal end, the first hole diameter, the second hole diameter and the third hole diameter gradually decrease, and the first hole diameter, the second hole diameter and the third hole diameter are connected through inclined surfaces.

[0008] The technical scheme is as follows: in the pressing process, the first aperture facilitates initial insertion of the bushing, the third aperture provides a close fit (interference fit), and the second aperture serves as a buffer transition zone; by arranging multiple apertures, stress is dispersed to different inclined surfaces, stress concentration is reduced, and the service life of the automobile swing arm is further prolonged.

[0009] The mounting hole is provided with a chamfer between the inlet end and the first aperture, and the opening diameter of the mounting hole at the inlet end is smaller than the first aperture.

[0010] The technical scheme is as follows: by arranging the chamfer between the inlet end and the first aperture, the bushing is facilitated to be inserted and guided.

[0011] The mounting hole is provided with a chamfer between the inlet end and the first aperture, and the opening diameter of the mounting hole at the inlet end is smaller than the first aperture.

[0012] The technical scheme is as follows: by arranging the chamfer between the inlet end and the first aperture, the bushing is facilitated to be inserted and guided.

[0013] The technical scheme is as follows: by arranging the chamfer between the inlet end and the first aperture, the bushing is facilitated to be inserted and guided.

[0014] The technical scheme is as follows: by arranging the chamfer between the inlet end and the first aperture, the bushing is facilitated to be inserted and guided.

[0015] The technical scheme is as follows: by arranging the chamfer between the inlet end and the first aperture, the bushing is facilitated to be inserted and guided.

[0016] The technical scheme is as follows: by arranging the chamfer between the inlet end and the first aperture, the bushing is facilitated to be inserted and guided.

[0017] The technical scheme is as follows: by arranging the chamfer between the inlet end and the first aperture, the bushing is facilitated to be inserted and guided.

[0018] The technical scheme is as follows: by arranging the chamfer between the inlet end and the first aperture, the bushing is facilitated to be inserted and guided.

[0019] The utility model will be further explained in detail below in combination with the drawings and embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the whole structure schematic diagram of the utility model.

[0021] Figure 2 It is the bush structure schematic diagram of the utility model.

[0022] Figure 3 It is the mounting seat sectional view of the utility model.

[0023] Figure 4 It is the bush main view of the utility model.

[0024] Figure 5 It is the utility model explosion view.

[0025] Label explanation: automobile swing arm body 1, lightening hole 11, first connecting arm 2, second connecting arm 3, third connecting arm 4, mounting groove 41, riveting hole 42 (711), bush 5, taper surface 51, mounting seat 6, mounting hole 61, inlet end 611, chamfer 611a, end 612, first stage aperture 613, second stage aperture 614, third stage aperture 615, inclined surface 616, ball head assembly 7, mounting plate 71. DETAILED DESCRIPTION

[0026] The specific embodiment and disclosed embodiment drawing only involve the structure involved in the embodiment of the disclosure, other structures can refer to the usual design, and the person skilled in the art can make the modification without creative contribution to the embodiment after reading the present specification, but as long as it is within the scope of the claims of the utility model, it is protected by the patent law.

[0027] As Figures 1-5 Shown in the utility model discloses a long service life's automobile swing arm, including automobile swing arm body 1, automobile swing arm body 1 is hollow and is provided with lightening hole 11, automobile swing arm body 1 is provided with first connecting arm 2 and second connecting arm 3, first connecting arm 2 and second connecting arm 3 are provided with bush 5, bush 5 is made of rubber or polyurethane material, first connecting arm 2 and second connecting arm 3 are all provided with the mounting seat 6 of bush 5 pressure equipment, the mounting hole 61 of being provided with in mounting seat 6, the inner wall of mounting hole 61 is set up in ladder type and is gradually smaller in size from one end to the other end.

[0028] As Figure 3The mounting hole 61 is provided with a chamfer 611a between the entrance end 611 and the first aperture 613, and the opening diameter of the mounting hole 61 at the entrance end 611 is smaller than the first aperture 613.

[0029] As shown in the mounting hole 61, Figure 3 the chamfer 611a is provided between the entrance end 611 and the first aperture 613, and the opening diameter of the mounting hole 61 at the entrance end 611 is smaller than the first aperture 613.

[0030] As shown in the mounting hole 61, Figure 4 the taper surface 51 is provided on the outer wall of the bushing 5 corresponding to the chamfer 616 between the first aperture 613, the second aperture 614 and the third aperture 615, and the taper surface 51 can form a surface contact with the corresponding chamfer 616 after press fitting.

[0031] As shown in the mounting hole 61, Figure 5 The third connecting arm 4 is provided with the ball head assembly 7, and the third connecting arm 4 and the ball head assembly 7 are provided with the mounting groove 41 on the installation end side, the ball head assembly 7 is provided with the mounting plate 71, the mounting plate 71 can be inserted into the mounting groove 41, and the mounting plate 71 and the third connecting arm 4 are provided with the rivet hole 42 (711) corresponding to the mounting groove 41, and the rivet hole 42 (711) is riveted with the rivet.

[0032] Compared with the stress concentration leading to fatigue cracks between the bushing 5 and the mounting hole 61 of the bushing 5 in the prior art, the mounting hole 61 is designed in a stepped variable diameter in the utility model, the first aperture 613 is convenient for the initial insertion of the bushing 5 during the press fitting process, the third aperture provides a close fit (interference fit), the second aperture serves as a buffer transition zone, and the stress can be dispersed to different chamfers 616 through the arrangement of multiple apertures, thereby reducing the problem of stress concentration, avoiding the stress concentration caused by the right-angle mutation through the transition between different apertures through the chamfer 616, prolonging the service life of the automobile swing arm, and further providing the taper surface 51 on the outer wall of the bushing 5, so that the taper surface 51 can form a surface contact with the corresponding chamfer 616 after press fitting, the stress distribution is more uniform, the stepped structure forms mechanical interlocking, and the anti-loosening ability is stronger.

Claims

1. A long service life automobile swing arm, comprising an automobile swing arm body, a first connecting arm and a second connecting arm are arranged on the automobile swing arm body, and bushings are arranged on the first connecting arm and the second connecting arm, characterized in that: The first connecting arm and the second connecting arm are provided with mounting seats for press-fitting the bushings, the mounting seats are provided with mounting holes penetrating through the mounting seats, the inner walls of the mounting holes are provided with stepped variable-diameter structures, and the diameters of the mounting holes gradually decrease from one end to the other end.

2. The long service life automobile swing arm according to claim 1, characterized in that: One end of the mounting hole is an entry end, and the other end is a terminal end, the inner wall of the mounting hole is sequentially provided with a first-level hole diameter, a second-level hole diameter and a third-level hole diameter along the direction from the entry end to the terminal end, the first-level hole diameter, the second-level hole diameter and the third-level hole diameter gradually decrease, and the first-level hole diameter, the second-level hole diameter and the third-level hole diameter are connected through inclined surfaces.

3. The long service life automobile swing arm according to claim 2, characterized in that: The mounting hole is provided with a chamfer between the entry end and the first-level hole diameter, and the opening diameter of the entry end of the mounting hole is smaller than the first-level hole diameter.

4. The long service life automobile swing arm according to claim 3, characterized in that: The inner wall of the mounting hole is provided with a rubber layer.

5. The long service life automotive swing arm of any one of claims 1-4, wherein: The outer wall of the bushing is provided with a conical surface corresponding to the inclined surfaces between the first-level hole diameter, the second-level hole diameter and the third-level hole diameter, and the conical surface can form surface contact with the corresponding inclined surfaces after press-fitting.

6. The long service life automotive swing arm of any one of claims 1-4, wherein: The automobile swing arm body is further provided with a third connecting arm, the third connecting arm is provided with a ball head assembly, the third connecting arm and the side surface of the mounting end of the ball head assembly are provided with mounting grooves, the ball head assembly is provided with a mounting plate, the mounting plate can be inserted into the mounting grooves, and the mounting plate and the third connecting arm are provided with rivet holes corresponding to the mounting grooves, and the rivet holes are riveted with rivets.

7. The long service life automotive swing arm of claim 6, wherein: The automobile swing arm body is hollowed out to form a weight-reducing hole.

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