CN216185429U - Hollow steering shaft of large-torque new energy automobile - Google Patents
Hollow steering shaft of large-torque new energy automobile Download PDFInfo
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- CN216185429U CN216185429U CN202121511355.9U CN202121511355U CN216185429U CN 216185429 U CN216185429 U CN 216185429U CN 202121511355 U CN202121511355 U CN 202121511355U CN 216185429 U CN216185429 U CN 216185429U
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- 230000007704 transition Effects 0.000 claims abstract description 10
- 230000008859 change Effects 0.000 claims description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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Abstract
The utility model discloses a large-torque new energy automobile hollow steering shaft which is of a variable-section full-hollow uneven internal tooth structure and comprises a large-diameter internal tooth section, a large-diameter variable-diameter section, a large-diameter middle section, a small-diameter variable-diameter section, a table stage, a small-diameter internal tooth section, a large-end internal tooth, a small-end internal tooth, a large-end wide key groove and a small-end wide key groove. The large-diameter inner tooth section and the large-diameter middle section are in circular arc transition through the large reducing section, the T-shaped inner teeth which are unevenly distributed inside the large-diameter inner tooth section penetrate through the whole large-diameter inner tooth section, and the uneven T-shaped inner teeth are convenient to position and assemble by arranging a large T-shaped groove. The large-diameter middle section is an original section and is transited to the step section through the small reducing section and then transited to the small-diameter inner tooth section, and the T-shaped inner teeth which are unevenly distributed in the small-diameter inner tooth section penetrate through the whole small-diameter inner tooth section and are extended and transited to the step section. The steering shaft is formed by rotary swaging, the larger middle section diameter can resist large torque, the structural strength and the fatigue resistance are ensured, meanwhile, raw materials are saved through the full hollow structure, and the light weight of automobile parts is realized.
Description
Technical Field
The utility model relates to the technical field of shaft part processing, in particular to an all-hollow EPS steering shaft of a large-torque new energy automobile.
Background
The steering shaft has the function of transmitting the steering torque of a driver acting on a steering wheel to the steering gear, is a core component of an automobile steering system, and has the advantages and disadvantages of performance directly related to traffic and personal safety, so the steering shaft has certain rigidity, and also has an energy absorption function and better anti-fatigue capability.
With the increasing shortage of energy and environmental pollution, energy conservation and environmental protection become important problems facing all countries in the world, new energy automobiles are vigorously developed, lightweight development of automobiles is promoted, traffic energy transformation is realized, and the method becomes an important way for realizing sustainable development of the automobile industry in the world. The large-torque full-hollow EPS steering shaft provided by the utility model meets the requirement of light weight of an automobile.
The main production and processing mode of the traditional automobile steering shaft is to forge a solid hollow steering shaft firstly and then process the full hollow structure of the steering shaft on a machine tool. Such production processes have several significant drawbacks, such as low material utilization, low production efficiency, and high production costs; and subsequent machining on a machine tool can damage the streamline structure of the forged steering shaft, and the structural strength of the steering shaft is adversely affected. The large-torque full-hollow EPS steering shaft adopts a rotary swaging technology, and continuously impacts and forms a blank while rotating around the outer diameter of the blank through two or more hammers. The product obtained by the rotary swaging technology can keep the streamline structure of the product, and the structural strength and the fatigue resistance of the steering shaft are improved. Simultaneously, the internal splines at two ends of the steering shaft and the variable-section large-diameter shaft can be forged at one time, so that the production efficiency is improved, and the problems are well solved.
According to the traditional full-hollow EPS steering shaft produced by adopting the rotary swaging technology, the wall thickness of a connecting section between a large-diameter section and a small-diameter section is greatly changed, and the diameter change of the large-diameter section and the small-diameter section is small. In actual use, torque peak values of the steering shaft are mainly concentrated near the middle section of the large end, and the large-diameter section of the traditional EPS steering shaft has poor torque resistance and fatigue resistance under the large-torque conditions of complex road conditions, severe working conditions and the like. Because the torque is mainly related to the diameter, the middle section of the large-torque EPS steering shaft adopts a larger diameter, and the large-diameter section and the small-diameter section are slowly transited through a longer variable-diameter section. Finally, the excellent fatigue resistance and the performance of coping with the complex working condition with large torque are achieved.
Disclosure of Invention
The utility model discloses a large-torque full-hollow EPS steering shaft which is characterized in that the large-torque full-hollow EPS steering shaft is capable of bearing large torque due to the fact that reducing transition of a large-diameter middle section and two ends of the steering shaft is excessive, and the structure of the large-torque full-hollow steering shaft comprises a large-diameter inner tooth section, a large reducing section, a large-diameter middle section, a small reducing section, a table stage, a small-diameter inner tooth section, a large-end inner tooth, a small-end wide key groove and a large-end wide key groove. Each section is of a hollow structure, the sections are in arc transition, and the whole steering shaft is axially symmetrical. The diameter of the large-diameter middle section is the largest of the original section, the large-diameter variable section is in arc transition, the small-diameter variable section is in linear transition, the diameter of the large-diameter inner tooth section is smaller than that of the large-diameter middle section, the step section is next, and the diameter of the small-diameter inner tooth section is the smallest.
In summary, the large-torque fully hollow EPS steering shaft according to the present invention is formed by swaging, compared with the conventional solid steering shaft and the hollow steering shaft formed by machining. The raw materials are saved while the structural strength is ensured, and the light weight is realized. And the streamline structure of the steering shaft is reserved, the structural strength and the fatigue resistance of the steering shaft are favorably improved, and the large diameter of the large-diameter middle section enables the steering shaft to have good large torque resistance.
Drawings
Fig. 1 is a high-torque hollow steering shaft according to the present invention, fig. 2 is a sectional view of the high-torque hollow steering shaft, and fig. 3 is an axial view of both ends of the high-torque hollow steering shaft.
The labels in the figures show: 1-large diameter inner tooth section, 2-large diameter section, 3-large diameter middle section, 4-small diameter section, 5-stage, 6-small diameter inner tooth section, 7-large end inner tooth, 8-small end inner tooth, 9-small end wide key groove and 10-large end wide key groove.
Detailed Description
The following detailed description of the embodiments of the utility model is provided in conjunction with the accompanying drawings.
As shown in the attached drawings of the specification, the high-torque all-hollow EPS steering shaft has the structural characteristics of all-hollow variable-section large-diameter uneven internal teeth. Tooth section 1 and 6 inside uneven T shape internal tooth main aspects internal teeth 7 and the tip internal tooth 8 of all being equipped with in minor diameter internal tooth section in major diameter 1, are equipped with the wide keyway 10 of major end in the major end internal tooth 7, are equipped with the wide keyway 9 of tip in the tip internal tooth 8, and the steering spindle has remain its streamline structure through the direct shaping of swaging technique, has good structural strength and size precision.
The longer length of the large-end internal teeth 7 and the small-end internal teeth 8 can provide enough clamping force and good matching effect. The large-end wide key groove 10 and the small-end wide key groove 9 are convenient to assemble and position. In the practical process of the steering shaft, the torque peak value is mainly concentrated at the middle part of the steering shaft close to the large-diameter inner tooth section 1, and the large-diameter inner tooth section 1 and the large-diameter middle section 3 are transited by the large-diameter reducing section 2. The torque is mainly related to the diameter of the steering shaft, and the larger diameter of the large-diameter middle section 3 can resist larger torque. The large-diameter middle section 3 is transited to a step section 5 through a small reducing section 4 and then transited to a small-diameter inner tooth section 6.
The small-end internal teeth 8 inside the small-diameter internal tooth section 6 extend and transition into the step section 5, so that a large contact surface is provided, and the clamping force and the safety of the steering shaft are improved.
The above-described embodiments are intended to be illustrative only, and not to be limiting, and various combinations, modifications, or equivalents may be made without departing from the spirit and scope of the present invention.
Claims (4)
1. A large-torque hollow steering shaft of a new energy automobile is characterized by comprising a full-hollow large-diameter variable-section uneven internal tooth structure, a large-diameter internal tooth section (1), a large-diameter variable-diameter section (2), a large-diameter middle section (3), a small-diameter variable-diameter section (4), a table stage (5), a small-diameter internal tooth section (6), a large-end internal tooth (7), a small-end internal tooth (8), a small-end wide key groove (9), a large-end wide key groove (10), a large-end internal tooth (7) arranged inside the large-diameter internal tooth section (1), a large-end wide key groove (10) arranged on the large-end internal tooth (7), one end of the large-diameter middle section (3) connected with the large-diameter internal tooth section (1) through the large-diameter variable-diameter section (2), the other end of the large-diameter middle section (3) connected with the step section (5) through the small-diameter variable-diameter section (4), the table stage (5) connected with the small-diameter internal tooth section (6), and a small-end internal tooth (8) arranged inside the small-diameter internal tooth section (6), a small end wide key groove (9) is arranged on the small end internal tooth (8).
2. The hollow steering shaft for the large-torque new energy automobile according to claim 1, wherein two ends of the steering shaft are respectively provided with non-uniform T-shaped internal teeth with large-end internal teeth (7) and small-end internal teeth (8), the large-end internal teeth (7) penetrate through the inner wall of the whole large-diameter internal tooth section (1), and the small-end internal teeth (8) penetrate through the small-diameter internal tooth section (6) and extend to transition to the inner wall of the step section (5).
3. The hollow steering shaft for the large-torque new energy automobile according to claim 1, wherein the large-diameter middle section (3) has a larger diameter and is in rapid transition with the large-diameter inner tooth section (1) through the arc of the large reducing section (2) and is in slow transition to the step section (5) through the small reducing section (4).
4. The hollow steering shaft of the large-torque new energy automobile as claimed in claim 1, wherein the whole steering shaft is of a full-hollow variable-section non-uniform internal tooth structure, the sections are in arc transition, the wall thickness change between the sections is small, and the wall thickness is uniform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121511355.9U CN216185429U (en) | 2021-07-05 | 2021-07-05 | Hollow steering shaft of large-torque new energy automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121511355.9U CN216185429U (en) | 2021-07-05 | 2021-07-05 | Hollow steering shaft of large-torque new energy automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216185429U true CN216185429U (en) | 2022-04-05 |
Family
ID=80894388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121511355.9U Expired - Fee Related CN216185429U (en) | 2021-07-05 | 2021-07-05 | Hollow steering shaft of large-torque new energy automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216185429U (en) |
-
2021
- 2021-07-05 CN CN202121511355.9U patent/CN216185429U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220405 |