CN113944683A - Carbon fiber variable cross-section shaft tube transmission shaft - Google Patents
Carbon fiber variable cross-section shaft tube transmission shaft Download PDFInfo
- Publication number
- CN113944683A CN113944683A CN202111223405.8A CN202111223405A CN113944683A CN 113944683 A CN113944683 A CN 113944683A CN 202111223405 A CN202111223405 A CN 202111223405A CN 113944683 A CN113944683 A CN 113944683A
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- carbon fiber
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- transmission shaft
- variable cross
- shaft tube
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 118
- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 110
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 110
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 105
- 238000013329 compounding Methods 0.000 claims description 4
- 239000010959 steel Substances 0.000 abstract description 27
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 15
- 229910000851 Alloy steel Inorganic materials 0.000 abstract description 9
- 239000007769 metal material Substances 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 18
- 239000000463 material Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C3/00—Shafts; Axles; Cranks; Eccentrics
- F16C3/02—Shafts; Axles
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The invention relates to the technical field of vehicle parts, in particular to a carbon fiber variable cross-section shaft tube transmission shaft, which comprises: the universal joint fork, carbon fiber variable cross-section shaft tube and spline housing. The universal joint fork is connected at one end of the carbon fiber variable cross-section shaft tube, and the spline housing is connected at the other end of the carbon fiber variable cross-section shaft tube. According to the carbon fiber variable cross-section shaft tube transmission shaft, the carbon fiber variable cross-section shaft tube is adopted to replace a traditional steel or aluminum alloy shaft tube, the length of the whole transmission shaft can be increased on the premise of ensuring the required strength, and the carbon fiber variable cross-section shaft tube transmission shaft is suitable for long-wheelbase vehicles. The weight of the carbon fiber variable cross-section shaft tube is lower than that of metal materials such as steel or aluminum alloy shaft tubes, and the lightweight of the transmission shaft is realized. In addition, compared with the carbon fiber shaft tube with the uniform cross section, the carbon fiber variable cross section shaft tube transmission shaft provided by the invention has the advantages that the appearance size is reduced on the premise of ensuring the strength of the transmission shaft, and the layout of the transmission shaft is more convenient.
Description
Technical Field
The invention relates to the technical field of vehicle parts, in particular to a carbon fiber variable cross-section shaft tube transmission shaft.
Background
The transmission shaft is an important part for transmitting power in an automobile transmission system, and the transmission shaft, a gearbox and a drive axle are used for transmitting the power of an engine to wheels so that an automobile generates driving force. At present, most of transmission shaft tubes of commercial vehicles are made of steel. For a steel transmission shaft, the following formula is generally adopted for calculating the critical rotating speed:
when the calculated critical speed n is lower than the maximum speed of the drive shaft, the drive shaft is at risk of use. The following formula is generally adopted for calculating the critical rotating speed of the aluminum alloy transmission shaft:
in terms of quantity, if the steel transmission shaft and the aluminum alloy transmission shaft have the same critical rotating speed, the outer diameter of the aluminum alloy transmission shaft needs to be increased. This is why aluminium alloy shafts have a larger external dimension than steel shafts during use. The application of the aluminum alloy transmission shaft is limited to a certain extent due to the limitation of the arrangement space of the automobile chassis. Meanwhile, since the critical rotation speed must be greater than the maximum rotation speed of the propeller shaft, the length of the propeller shaft is limited and cannot be too long.
The existing steel and aluminum alloy transmission shaft tube of the automobile has the defects of heavy weight, limited length and the like, and the traditional carbon fiber shaft tube has the problem of too much strength allowance.
Disclosure of Invention
The invention provides a carbon fiber variable cross-section shaft tube transmission shaft, which aims at the technical problems that in the prior art, the shaft tube of a steel or aluminum alloy transmission shaft of an automobile has the defects of heavy weight, limited length and the like, and the traditional carbon fiber shaft tube has too much strength margin.
The technical scheme for solving the technical problems is as follows:
a carbon fiber variable cross-section shaft tube transmission shaft comprises: the universal joint fork, the carbon fiber variable cross-section shaft tube and the spline housing;
the universal joint fork is connected to one end of the carbon fiber variable cross-section shaft tube, and the spline housing is connected to the other end of the carbon fiber variable cross-section shaft tube.
Furthermore, the carbon fiber variable cross-section shaft tube is of a symmetrical tubular structure with thick ends and thin middle.
Furthermore, a plurality of bulges which are uniformly distributed are arranged on the circumference of the inner sides of the two ends of the carbon fiber variable cross-section shaft tube;
a plurality of grooves which are uniformly distributed are formed in the circumferences of the outer sides of the universal joint fork and the spline sleeve;
the protrusion is tightly embedded with the groove.
Further, the carbon fiber variable cross-section shaft tube comprises: a first straight pipe portion, a variable cross-section pipe portion and a second straight pipe portion;
one end of the first straight pipe part is used for being connected with the universal joint fork, and the other end of the first straight pipe part is integrally connected with one end of the variable-section pipe part; one end of the second straight pipe part is used for being connected with the spline housing, and the other end of the second straight pipe part is integrally connected with the other end of the variable-section straight pipe part;
the inner diameter and the outer diameter of the first straight pipe part are the same as those of the second straight pipe part;
the variable-section pipe part is of a tubular structure which uniformly thins from two ends to the middle.
Furthermore, the carbon fiber variable cross-section shaft tube is formed by compounding multiple layers of carbon fibers.
The carbon fiber variable cross-section shaft tube transmission shaft provided by the invention at least has the following beneficial effects or advantages:
according to the carbon fiber variable cross-section shaft tube transmission shaft provided by the invention, the universal joint fork is connected to one end of the carbon fiber variable cross-section shaft tube, and the spline housing is connected to the other end of the carbon fiber variable cross-section shaft tube. According to the carbon fiber variable cross-section shaft tube transmission shaft, the carbon fiber variable cross-section shaft tube is adopted to replace a traditional steel or aluminum alloy shaft tube, the length of the whole transmission shaft can be increased on the premise of ensuring the required strength, and the carbon fiber variable cross-section shaft tube transmission shaft is suitable for long-wheelbase vehicles. The weight of the carbon fiber variable cross-section shaft tube is lower than that of metal materials such as steel or aluminum alloy shaft tubes, and the lightweight of the transmission shaft is realized. In addition, compared with the carbon fiber shaft tube with the uniform cross section, the carbon fiber variable cross section shaft tube transmission shaft provided by the invention has the advantages that the appearance size is reduced on the premise of ensuring the strength of the transmission shaft, and the whole transmission shaft is more conveniently distributed.
Drawings
FIG. 1 is a schematic structural view of a carbon fiber variable cross-section shaft tube transmission shaft provided by an embodiment of the invention;
FIG. 2 is a schematic view of a carbon fiber variable cross-section shaft tube structure provided by an embodiment of the invention;
fig. 3 is a sectional view F-F in fig. 1.
In the drawings, the components represented by the respective reference numerals are listed below:
the universal joint comprises a universal joint yoke 1, a carbon fiber variable cross section shaft tube 2, a first straight tube portion 21, a variable cross section tube portion 22, a second straight tube portion 23 and a spline housing 3.
Detailed Description
The invention provides a carbon fiber variable cross-section shaft tube transmission shaft, which aims at the technical problems that in the prior art, the shaft tube of a steel or aluminum alloy transmission shaft of an automobile has the defects of heavy weight, limited length and the like, and the traditional carbon fiber shaft tube has too much strength margin.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that terms such as "upper", "lower", "front", "rear", "left", "right", and the like in the embodiments indicate terms of orientation, and are used only for simplifying the positional relationship based on the drawings of the specification, and do not represent that the elements, devices, and the like indicated in the description must operate according to the specific orientation and the defined operation, method, and configuration, and such terms are not to be construed as limiting the present invention.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; may be directly connected or indirectly connected through an intermediate. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in conjunction with specific situations.
Referring to fig. 1, an embodiment of the present invention provides a carbon fiber variable cross-section shaft tube transmission shaft, which mainly includes: universal joint fork 1, carbon fiber variable cross section axle tube 2 and spline housing 3. The universal joint fork 1 is connected at the one end of carbon fiber variable cross section shaft pipe 2, and the spline housing 3 is connected at the other end of carbon fiber variable cross section shaft pipe 2. The carbon fiber variable cross-section shaft tube 2 can be formed by processing single-layer carbon fibers or compounding multiple layers of carbon fibers; when the carbon fiber variable cross-section shaft tube 2 is formed by compounding multiple layers of carbon fibers, carbon fiber materials with different specifications can be adopted to obtain the carbon fiber variable cross-section shaft tube 2 with different strengths.
For a general carbon fiber transmission shaft, the following formula is adopted for calculating the critical rotating speed:
for steel transmission shafts, aluminum alloy transmission shafts and carbon fiber transmission shafts, the calculation formulas of the critical rotation speeds can be unified as follows:
wherein E is the elastic modulus of the material; j is bending moment of inertia, J ═ pi (D)4-d4) A/64; q is the mass per unit length, q ═ pi (D)2-d2) Gamma/4, gamma being the material density (N/mm)3)。
The general carbon fiber has an elastic modulus of 1.0x105Mpa; the high-strength carbon fiber has an elastic modulus of 2.5x105Mpa; the high mode carbon fiber has an elastic modulus of 3.0x105Mpa. For the high-strength carbon fiber transmission shaft, the following formula is adopted for calculating the critical rotating speed:
for a high-model carbon fiber transmission shaft, the following formula is adopted for calculating the critical rotating speed:
therefore, compared with a steel transmission shaft, under the conditions of the same specification of shaft tube and the same critical rotating speed, the lengths of the universal type carbon fiber transmission shaft, the high-strength type carbon fiber transmission shaft and the high-model carbon fiber transmission shaft are respectively 1.21 times, 1.53 times and 1.6 times of the length of the steel transmission shaft. For the transmission shafts with the same length, under the condition that the thicknesses of the shaft tubes are the same, the corresponding relationship between the carbon fiber transmission shaft and the steel transmission shaft outer diameter D (Dt is the carbon fiber transmission shaft tube outer diameter, and Dg is the steel transmission shaft tube outer diameter) is as follows:
for the general carbon fiber transmission shaft, the relation between the outer diameter of the general carbon fiber transmission shaft and the outer diameter of the steel transmission shaft is calculated as follows: a 52-lug transmission shaft, Dt is 0.6835 Dg; a 57-ear hole transmission shaft Dt is 0.6855 Dg; 60 (the digital ear hole specification), Dt is 0.6858 Dg; a 62-ear hole transmission shaft, Dt is 0.6871 Dg; a 65-ear hole transmission shaft, Dt is 0.6861 Dg; 68 earhole transmission shaft, Dt is 0.6883 Dg; 72 earhole drive shaft, Dt is 0.6871 Dg. Therefore, no matter the size of the ear hole of the transmission shaft, the outer diameter relation of the universal carbon fiber transmission shaft and the steel transmission shaft is unified to be Dt which is 0.70 Dg; taking into account the safety factor, Dt is taken to be 0.80 Dg.
For the high-strength carbon fiber transmission shaft, the relation between the outer diameter of the high-strength carbon fiber transmission shaft and the outer diameter of the steel transmission shaft is calculated as follows: a 52-lug transmission shaft, Dt is 0.4434 Dg; a 57-ear hole transmission shaft Dt is 0.4466 Dg; a 60-ear hole transmission shaft, Dt is 0.4472 Dg; a 62-ear hole transmission shaft, Dt is 0.4492 Dg; a 65-ear hole transmission shaft, Dt is 0.4476 Dg; 68 earhole transmission shaft, Dt is 0.4514 Dg; 72 earhole drive shaft, Dt is 0.4494 Dg. Therefore, no matter the size of the ear hole of the transmission shaft, the relation between the high-strength carbon fiber transmission shaft and the outer diameter of the steel transmission shaft is unified to Dt which is 0.50 Dg; taking into account the safety factor, Dt is taken to be 0.60 Dg.
For the high-model carbon fiber transmission shaft, the relation between the outer diameter of the high-model carbon fiber transmission shaft and the outer diameter of the steel transmission shaft is calculated as follows: a 52-lug transmission shaft, Dt is 0.4069 Dg; a 57-ear hole transmission shaft Dt is 0.4103 Dg; a 60-ear hole transmission shaft, Dt is 0.4109 Dg; a 62-ear hole transmission shaft, Dt is 0.4131 Dg; a 65-ear hole transmission shaft, Dt is 0.4114 Dg; 68 earhole transmission shaft, Dt is 0.4153 Dg; 72 earhole drive shaft, Dt is 0.4133 Dg. Therefore, no matter the size of the ear hole of the transmission shaft, the outer diameter relation of the high-model carbon fiber transmission shaft and the steel transmission shaft is unified to be Dt which is 0.50 Dg; taking into account the safety factor, Dt is taken to be 0.55 Dg.
The price factors of high-strength and high-model carbon fiber materials are considered, and the high-strength carbon fiber transmission shaft is adopted on a high-vehicle-distribution type, so that the high-strength and high-model carbon fiber transmission shaft is more economical than the high-model carbon fiber transmission shaft.
It can be seen that, compared with a steel transmission shaft, under the condition of the same specification of shaft tube and the same critical rotating speed, the lengths of the universal type carbon fiber transmission shaft, the high-strength type carbon fiber transmission shaft and the high-model carbon fiber transmission shaft are respectively 1.21 times, 1.53 times and 1.6 times of the steel transmission shaft. On the premise of the same wall thickness and the same critical rotating speed, the outer diameters of the universal type, the high-strength type and the high-model carbon fiber transmission shaft tube are 0.8 time, 0.6 time and 0.55 time of the outer diameter of the steel transmission shaft tube.
Therefore, the carbon fiber variable-section shaft tube transmission shaft provided by the embodiment of the invention can improve the length of the whole transmission shaft and is suitable for long-wheelbase vehicles.
Referring to fig. 2, the carbon fiber variable cross-section shaft tube 2 is provided as a symmetrical tubular structure with thick ends and thin middle. Specifically, the carbon fiber variable cross-section shaft tube 2 includes: a first straight tube portion 21, a variable cross-section tube portion 22, and a second straight tube portion 23. One end of the first straight tube portion 21 is used for connection to the yoke 1, and the other end of the first straight tube portion 21 is integrally connected to one end of the variable-section tube portion 22. One end of the second straight tube portion 23 is used for connecting the spline housing 3, and the other end of the second straight tube portion 23 is integrally connected with the other end of the variable cross-section straight tube portion. The first straight tube portion 21 and the second straight tube portion 23 have the same inner diameter and outer diameter. The variable cross-section tube portion 22 is provided in a tubular structure that is uniformly tapered from both ends to the middle, but a middle section of the variable cross-section tube portion 22 may be provided as an equal cross-section tube. Compared with a carbon fiber shaft tube with a uniform cross section, the carbon fiber variable cross section shaft tube 2 reduces the appearance size on the premise of ensuring the strength of the transmission shaft, and is more convenient for the layout of the transmission shaft.
In order to realize the reliable connection of the universal joint yoke 1 and the spline housing 3, referring to fig. 3, in the embodiment of the invention, a plurality of uniformly distributed bulges are arranged on the circumference of the inner sides of two ends of the carbon fiber variable cross-section shaft tube 2; a plurality of uniformly distributed grooves are formed in the circumferences of the outer sides of the universal joint fork 1 and the spline housing 3; the protrusion is tightly embedded with the groove. Through setting up protruding and recess matched with structure, can add the grip between universal joint fork 1 and spline housing 3 and the variable cross-section shaft tube of carbon fiber 2 to guarantee the reliable operation of transmission shaft.
The carbon fiber variable-section shaft tube transmission shaft provided by the embodiment of the invention at least has the following beneficial effects or advantages:
according to the carbon fiber variable cross-section shaft tube transmission shaft provided by the embodiment of the invention, the universal joint fork is connected to one end of the carbon fiber variable cross-section shaft tube, and the spline housing is connected to the other end of the carbon fiber variable cross-section shaft tube. According to the carbon fiber variable cross-section shaft tube transmission shaft provided by the embodiment of the invention, the carbon fiber variable cross-section shaft tube is adopted to replace the traditional steel or aluminum alloy shaft tube, the length of the whole transmission shaft can be increased on the premise of ensuring the required strength, and the carbon fiber variable cross-section shaft tube transmission shaft is suitable for long-wheelbase vehicles. The weight of the carbon fiber variable cross-section shaft tube is lower than that of metal materials such as steel or aluminum alloy shaft tubes, and the lightweight of the transmission shaft is realized. In addition, compared with the carbon fiber shaft tube with the uniform cross section, the carbon fiber variable cross section shaft tube transmission shaft provided by the invention has the advantages that the appearance size is reduced on the premise of ensuring the strength of the transmission shaft, and the whole transmission shaft is more conveniently distributed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. The utility model provides a carbon fiber variable cross section axle tube transmission shaft which characterized in that includes: the universal joint fork (1), the carbon fiber variable cross-section shaft tube (2) and the spline housing (3);
the universal joint fork (1) is connected to one end of the carbon fiber variable cross-section shaft tube (2), and the spline sleeve (3) is connected to the other end of the carbon fiber variable cross-section shaft tube (2).
2. The carbon fiber section varying shaft tube transmission shaft according to claim 1, wherein the carbon fiber section varying shaft tube (2) is provided in a symmetrical tubular structure with a thick end and a thin middle.
3. The carbon fiber section-varying shaft tube transmission shaft according to claim 2, characterized in that a plurality of evenly distributed bulges are arranged on the circumference of the inner side of the two ends of the carbon fiber section-varying shaft tube (2);
a plurality of uniformly distributed grooves are formed in the circumferences of the outer sides of the universal joint fork (1) and the spline housing (3);
the protrusion is tightly embedded with the groove.
4. The carbon fiber variable section shaft tube transmission shaft according to claim 2, wherein the carbon fiber variable section shaft tube (2) comprises: a first straight tube section (21), a variable cross-section tube section (22), and a second straight tube section (23);
one end of the first straight pipe part (21) is used for being connected with the universal joint fork (1), and the other end of the first straight pipe part (21) is integrally connected with one end of the variable-section pipe part (22); one end of the second straight pipe part (23) is used for being connected with the spline housing (3), and the other end of the second straight pipe part (23) is integrally connected with the other end of the variable-section straight pipe part;
the first straight pipe portion (21) and the second straight pipe portion (23) have the same inner diameter and outer diameter;
the variable-section pipe part (22) is arranged into a tubular structure which uniformly tapers from two ends to the middle.
5. The carbon fiber variable cross-section shaft tube transmission shaft according to any one of claims 1 to 4, wherein the carbon fiber variable cross-section shaft tube (2) is formed by compounding multiple layers of carbon fibers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111223405.8A CN113944683A (en) | 2021-10-20 | 2021-10-20 | Carbon fiber variable cross-section shaft tube transmission shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111223405.8A CN113944683A (en) | 2021-10-20 | 2021-10-20 | Carbon fiber variable cross-section shaft tube transmission shaft |
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| Publication Number | Publication Date |
|---|---|
| CN113944683A true CN113944683A (en) | 2022-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111223405.8A Pending CN113944683A (en) | 2021-10-20 | 2021-10-20 | Carbon fiber variable cross-section shaft tube transmission shaft |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020195291A1 (en) * | 2001-06-21 | 2002-12-26 | Yasunori Nonogaki | Yoke, power transmission shaft, and method for manufacturing yoke |
| CN102815210A (en) * | 2012-08-30 | 2012-12-12 | 同济大学 | Composite-material automobile transmission shaft formed by pulling, squeezing and winding and preparation method thereof |
| CN111140601A (en) * | 2019-12-30 | 2020-05-12 | 东风汽车底盘系统有限公司 | Transmission shaft, transmission shaft assembly and transmission shaft welding method |
| US20200263727A1 (en) * | 2019-02-18 | 2020-08-20 | Hamilton Sundstrand Corporation | Drive shaft with non-cylindrical shape |
| CN112253606A (en) * | 2020-10-15 | 2021-01-22 | 东风越野车有限公司 | Lightweight carbon fiber transmission shaft and connection structure and whole car thereof |
| CN112283238A (en) * | 2020-09-22 | 2021-01-29 | 东风汽车底盘系统有限公司 | Novel super-long aluminum alloy transmission shaft |
-
2021
- 2021-10-20 CN CN202111223405.8A patent/CN113944683A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020195291A1 (en) * | 2001-06-21 | 2002-12-26 | Yasunori Nonogaki | Yoke, power transmission shaft, and method for manufacturing yoke |
| CN102815210A (en) * | 2012-08-30 | 2012-12-12 | 同济大学 | Composite-material automobile transmission shaft formed by pulling, squeezing and winding and preparation method thereof |
| US20200263727A1 (en) * | 2019-02-18 | 2020-08-20 | Hamilton Sundstrand Corporation | Drive shaft with non-cylindrical shape |
| CN111140601A (en) * | 2019-12-30 | 2020-05-12 | 东风汽车底盘系统有限公司 | Transmission shaft, transmission shaft assembly and transmission shaft welding method |
| CN112283238A (en) * | 2020-09-22 | 2021-01-29 | 东风汽车底盘系统有限公司 | Novel super-long aluminum alloy transmission shaft |
| CN112253606A (en) * | 2020-10-15 | 2021-01-22 | 东风越野车有限公司 | Lightweight carbon fiber transmission shaft and connection structure and whole car thereof |
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Application publication date: 20220118 |