Wheel hub motor drive axle device

Abstract

A hub motor drive axle device in the field of hub motor technology includes a drive axle body, an air spring suspension, a hub motor, an air spring, a shock absorber, and a traction rod control arm; the drive axle body and the air spring suspension are connected together by connecting bolts and locating pins, the hub motor is connected to the middle part of the air spring suspension by connecting bolts, the air spring and the shock absorber are arranged at the end of the air spring suspension, the traction rod control arm is arranged on the drive axle body and the air spring suspension respectively, and the hub motor integrates the motor, the reducer, and the brake. The invention has a reasonable design, good overall strength and stiffness, uniform stress distribution, small deformation, and light weight under the same specifications.

Description

Technical Field

[0001] The present invention relates to a drive axle device in the technical field of wheel hub motors, in particular to a wheel hub motor drive axle device in which each cross section of an air spring suspension has different thicknesses. Background Art

[0002] The wheel hub motor technology is also known as the in-wheel motor technology. Its biggest feature is that the power, transmission and braking devices are integrated into the wheel hub, thus greatly simplifying the mechanical part of the electric vehicle. In the 1970s, this technology was applied in fields such as mining transport vehicles. As for the wheel hub motors used in passenger cars, Japanese manufacturers started the research and development of this technology earlier and are currently in a leading position. International auto giants including General Motors and Toyota have also been involved in this technology. Domestic research on wheel hub motors in my country is mostly concentrated in colleges and universities, and the products are all electric vehicles. However, the research on wheel hub motor drive technology is not yet mature, especially in the development of high-torque wheel hub motors. There is still a certain gap with foreign advanced products. Therefore, my country still needs to increase investment in the research and development of wheel hub motor technology, improve core competitiveness, narrow the gap, and strive to reach the world's advanced level.

[0003] The hub motor and the drive axle are two devices that complement each other. However, in the prior art, the drive axle design is still too complicated, the mass is heavy, and the stiffness and strength distribution is uneven. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides a wheel hub motor drive bridge device, which has good overall strength and stiffness, uniform stress distribution, small deformation and light weight.

[0005] The present invention is realized by the following technical scheme, which includes a driving axle body, an air spring suspension, a wheel hub motor, an air spring, a shock absorber, and a traction rod control arm; the driving axle body and the air spring suspension are connected together by connecting bolts and locating pins, the wheel hub motor is connected to the middle part of the air spring suspension by connecting bolts, the air spring and the shock absorber are both arranged at the end of the air spring suspension, the traction rod control arm is respectively arranged on the driving axle body and the air spring suspension, and the wheel hub motor integrates a motor, a reducer, and a brake.

[0006] Furthermore, in the present invention, the cross sections of the drive axle body and the air spring suspension have different thicknesses and irregular shapes.

[0007] Furthermore, in the present invention, the drive axle body and the air spring suspension are designed with local diamond-shaped reinforcement ribs or triangular ribs.

[0008] Furthermore, in the present invention, the driving axle body and the air spring suspension are assembled in a box-and-box manner, and are positioned by concave and convex platforms, reinforced by round pins, and assembled by screw assemblies.

[0009] Furthermore, in the present invention, the plurality of air springs and the plurality of shock absorbers are symmetrically arranged on the air spring suspension.

[0010] Furthermore, in the present invention, the traction rod control arm is arranged on the same side of the drive axle body and the air spring suspension.

[0011] Furthermore, in the present invention, the reducer is a sun-planet structure, and the brake includes a clutch left end plate, a clutch friction plate, a clutch steel plate, and a clutch right end plate.

[0012] Compared with the prior art, the present invention has the following beneficial effects: the present invention has a reasonable design and a simple structure, and can take into account strength, stiffness, stress distribution, strain, displacement and weight. Under the same specifications, the present invention has good strength and stiffness, uniform stress distribution, small deformation, light weight, and strong anti-twisting performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0014] Figure 2 Based Figure 1 A top view of

[0015] Figure 3 for Figure 1 Left view of;

[0016] Figure 4 It is a schematic diagram of the structure of the air spring suspension in an embodiment of the present invention;

[0017] Figure 5 FIG is a bottom view of the air spring suspension;

[0018] Figure 6 FIG. 1 is a front view of an air spring suspension;

[0019] Figure 7 for Figure 6 Schematic diagram of the structure of the AA section;

[0020] Figure 8 It is a structural schematic diagram of a drive axle body in an embodiment of the present invention;

[0021] Fig. 9 for Figure 8 A partial enlarged view of

[0022] Fig.10 It is a bottom view of the drive axle body;

[0023] Fig.11 It is a top view of the drive axle body;

[0024] Fig.12for Fig.11 Schematic diagram of the structure of the middle BB section;

[0025] Fig.13 for Fig.12 A partial enlarged view of

[0026] Among them: 1. Drive axle body, 2. Air spring suspension, 3. Hub motor, 4. Air spring, 5. Shock absorber, 6. Drawbar control arm, 7. Suspension bolt hole, 8. Suspension locating pin hole, 9. Suspension concave groove, 10. Suspension reinforcement rib, 11. Suspension locating concave platform, 12. Bridge body bolt hole, 13. Bridge body locating pin hole, 14. Bridge body locating boss, 15. Bridge body concave groove, 16. Bridge body reinforcement rib. DETAILED DESCRIPTION

[0027] The following is a detailed description of an embodiment of the present invention in conjunction with the accompanying drawings. This embodiment is based on the technical solution of the present invention and provides a detailed implementation method and a specific operation process, but the protection scope of the present invention is not limited to the following embodiment.

[0028] Example 1

[0029] Specific implementation examples Figures 1 to 13 As shown, the present invention includes a driving axle body 1, an air spring suspension 2, a hub motor 3, an air spring 4, a shock absorber 5, a traction rod control arm 6, a suspension bolt hole 7, a suspension locating pin hole 8, a suspension concave groove 9, a suspension reinforcing rib 10, a suspension locating concave platform 11, a bridge body bolt hole 12, a bridge body locating pin hole 13, a bridge body locating boss 14, a bridge body concave groove 15, and a bridge body reinforcing rib 16. Two air spring suspensions 2 are symmetrically arranged on both sides of the driving axle body 1; the driving axle body 1 and the two air spring suspensions 2 are connected together by installing connecting bolts and locating pins in the suspension bolt holes 7, the suspension locating pin holes 8, the bridge body bolt holes 12, and the bridge body locating pin holes 13; at the same time, the driving axle body 1 and the two air spring suspensions 2 are assembled in a sleeve box manner, and are matched and positioned by the suspension locating concave platform 11 and the bridge body locating boss 14 ; The two wheel hub motors 3 are connected to the middle parts of the two air spring suspensions 2 through connecting bolts; the four shock absorbers 5 are arranged at the extreme ends of the two air spring suspensions 2, and the four air springs 4 are arranged at the secondary ends of the two air spring suspensions 2, and the four shock absorbers 5 and the four air springs 4 are symmetrically arranged on the air spring suspensions 2; the two traction rod control arms 6 are arranged on the driving bridge body 1, and the two traction rod control arms 6 are arranged on the air spring suspension 2; the traction rod control arms 6 are arranged on the same side of the driving bridge body 1 and the air spring suspension 2; the suspension bolt hole 7, the suspension locating pin hole 8, the bridge body bolt hole 12, and the bridge body locating pin hole 13 are all round holes; the bridge body locating boss 14 matches the suspension locating recess 11, and the main contour part is a rectangle; the wheel hub motor 3 integrates the motor, the reducer, and the brake.

[0030] In the present invention, the overall rigidity of the present invention is improved by arranging the bridge body concave groove 15 and the bridge body reinforcing rib 16 on the driving bridge body 1, and arranging the suspension concave groove 9 and the suspension reinforcing rib 10 on the air spring suspension 2. At the same time, by making the thickness of each section of the driving bridge body 1 and the air spring suspension 2 unequal and irregular in shape, not only can the strength, rigidity, stress distribution, strain, displacement and weight be taken into account, but also, under the same specifications, the strength and rigidity are good, the stress distribution is uniform, the deformation is small, and the weight is light. The reinforcing ribs can be designed as local diamond reinforcing ribs or triangular ribs.

[0031] Example 2

[0032] In the first embodiment, the number of the air springs 4 and the shock absorbers 5 are both four, and in the present embodiment, both can be set to eight;

[0033] In Embodiment 1, the suspension bolt hole 7, the suspension positioning pin hole 8, the bridge bolt hole 12, and the bridge positioning pin hole 13 are all circular holes, and in this embodiment, they can be set to other shapes, such as elliptical.

[0034] In the first embodiment, the main contours of the bridge body positioning boss 14 and the suspension positioning recess 11 are rectangular, and in the present embodiment, they can be set to other shapes, such as an ellipse.

[0035] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art may make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. A wheel hub motor drive axle device, characterized in that: Including drive axle body, air spring suspension, wheel hub motor, air spring, shock absorber, and traction rod control arm; The driving axle body and the air spring suspension are connected together through connecting bolts and positioning pins; The wheel hub motor is connected to the middle part of the air spring suspension through connecting bolts; The air spring and the shock absorber are both arranged at the end of the air spring suspension; The traction rod control arms are respectively arranged on the drive axle body and the air spring suspension; The wheel hub motor integrates a motor, a reducer and a brake.

2. The wheel hub motor drive axle device according to claim 1, characterized in that The cross sections of the drive axle body and the air spring suspension have different thicknesses and irregular shapes.

3. The wheel hub motor drive axle device according to claim 1, characterized in that The driving axle body and the air spring suspension are designed with local diamond-shaped reinforcement ribs or triangular ribs.

4. The wheel hub motor drive axle device according to claim 1, characterized in that The driving axle body and the air spring suspension are assembled in a box-and-box manner, and are positioned by concave and convex platforms, reinforced by round pins, and assembled by screw assemblies.

5. The wheel hub motor drive axle device according to claim 1, characterized in that A plurality of air springs and a plurality of shock absorbers are symmetrically arranged on the air spring suspension.

6. The wheel hub motor drive axle device according to claim 1, characterized in that The traction rod control arm is arranged on the same side of the drive axle body and the air spring suspension.

7. The wheel hub motor drive axle device according to claim 1, characterized in that The reducer is a sun-planet structure, and the brake comprises a clutch left end plate, a clutch friction plate, a clutch steel plate, and a clutch right end plate.

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