CN112240354B - High-strength compact type three-pivot universal joint - Google Patents
High-strength compact type three-pivot universal joint Download PDFInfo
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- CN112240354B CN112240354B CN201910655365.0A CN201910655365A CN112240354B CN 112240354 B CN112240354 B CN 112240354B CN 201910655365 A CN201910655365 A CN 201910655365A CN 112240354 B CN112240354 B CN 112240354B
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- roller
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- universal joint
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
- F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
- F16D3/202—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints
- F16D3/205—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints the pins extending radially outwardly from the coupling part
- F16D3/2055—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members one coupling part having radially projecting pins, e.g. tripod joints the pins extending radially outwardly from the coupling part having three pins, i.e. true tripod joints
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
A high-strength compact type three-pivot universal joint comprises three pivots and a roller, wherein shaft heads on the three pivots are rotatably arranged in an inner cavity of the roller, an inner spline is arranged on the inner wall of each three pivot, and the ratio of the outer diameter of the roller to the diameter of a distribution circle of the roller is 0.915-0.935; the ratio of the width of the roller to the outer diameter of the roller is 0.21-0.25; the ratio of the platform height of the three pivots to the major diameter of the inner spline is 0.55-0.65. The three-pivot universal joint has the beneficial effects that the strength of the original weak parts is improved and the internal parts are more compact by adjusting the relevant sizes of all parts in the three-pivot universal joint on the premise of not changing the maximum outer diameter of the outer part of the universal joint, so that the high-strength requirement of an electric automobile is met, and the comfort of the electric automobile is improved.
Description
Technical Field
The invention relates to the technical field of universal joints, in particular to a high-strength compact type three-pivot universal joint.
Background
The three-pivot joint is the most common movable constant velocity joint and has been used for many years both at home and abroad. With the continuous development of automobile industry in recent years, the development speed of electric automobiles is faster and faster, but due to the design concept of the electric automobiles, compared with the traditional fuel oil automobiles, the electric automobiles have higher requirements on the mechanical strength, the fatigue endurance life and other performances of the constant-speed universal joint. Because the existing three-pivot constant velocity universal joint cannot well meet the high strength requirement of an electric automobile, the universal joint with the specification larger than that of a conventional type can only be selected at present, so that the product weight is increased, the product cost is increased, and certain waste is caused to resources.
Disclosure of Invention
In view of the above-mentioned drawbacks, the present invention provides a high-strength compact type three-pivot universal joint, which meets the high-strength requirement of electric vehicles.
A high-strength compact type three-pivot universal joint comprises three pivots and a roller, wherein shaft heads on the three pivots are rotatably arranged in an inner cavity of the roller, an inner spline is arranged on the inner wall of each three pivot, and the ratio of the outer diameter of the roller to the diameter of a distribution circle of the roller is 0.915-0.935; the ratio of the width of the roller to the outer diameter of the roller is 0.21-0.25; the ratio of the platform height of the three pivots to the major diameter of the inner spline is 0.55-0.65.
Preferably, the ratio of the outer diameter of the roller to the diameter of the distribution circle of the roller is 0.925.
Preferably, the ratio of the width of the roller to the outer diameter of the roller is 0.23.
Preferably, the ratio of the platform height of the three pivots to the major diameter of the internal spline is 0.6.
Preferably, the ratio of the shaft diameter of the shaft head to the diameter of the distribution circle of the roller is 0.517-0.537.
Preferably, the ratio of the shaft diameter of the shaft head to the diameter of the distribution circle of the roller is 0.527.
The three-pivot universal joint has the beneficial effects that the strength of the original weak parts is improved and the internal parts are more compact by adjusting the relevant sizes of all parts in the three-pivot universal joint on the premise of not changing the maximum outer diameter of the outer part of the universal joint, so that the high-strength requirement of an electric automobile is met, and the comfort of the electric automobile is improved.
Drawings
FIG. 1 is a front view of a three-pivot joint;
FIG. 2 is a cross-sectional view of a three-pivot joint;
element number description:
1 three pivots
11 shaft head
12 connecting hole
13 internal spline
2 universal joint outer part
3 roller
Axle diameter of A axle head
Width of B roller
Outer diameter of D roller
d major diameter of internal spline
Platform height of H three pivots
Distributed circle diameter of PCD roller
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and are not intended to limit the present invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by "upper", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.
As shown in fig. 1, the present invention provides a high-strength compact type three-pivot joint, which includes three pivots 1, rollers 3, and a joint outer member 2, wherein the inner wall of the joint outer member 2 is provided with raceways, and the rollers 3 are disposed in the raceways and can roll along the raceways. The shaft head 11 on the three-pivot shaft 1 is rotatably arranged in the inner cavity of the roller 3, a connecting hole 12 used for being connected with a driven shaft (not shown) is further formed in the three-pivot shaft 1, and internal splines 13 are distributed on the inner wall of the connecting hole 12. In operation, a driving shaft (not shown) drives the universal joint outer part 2 to rotate, the roller 3 drives the three-pivot shaft 1 to rotate along with the universal joint outer part, and the three-pivot shaft 1 is connected with a driven shaft through the spline 13, so that the driven shaft is driven to rotate, and power transmission is realized.
As shown in fig. 1 and 2, in order to improve the structural strength of the three-pivot type universal joint, the ratio of the outer diameter D of the roller 3 to the distribution circle diameter PCD of the roller 3 is 0.915-0.935, and the optimal ratio is 0.925, that is, by increasing the outer diameter D of the roller 3, the structural strength of the roller 3 is improved, so that the roller 3 can better drive the three-pivot 1 to rotate. The ratio of the width B of the roller 3 to the outer diameter D of the roller 3 is set to be 0.21-0.25, the optimal ratio is 0.23, and compared with the existing roller, the roller has the advantages that the width B of the roller 3 is reduced, the roller 3 is guaranteed to have enough up-and-down sliding distance on the shaft head 11, and good transmission performance is guaranteed. Meanwhile, the width B of the roller 3 is reduced, so that the assembly clearance between the outer surface of the roller 3 and the raceway is reduced, the roller 3 and the universal joint outer part 2 are assembled more tightly, vibration and noise generated in the working process of the universal joint are reduced, and the comfort of the electric automobile is improved.
In addition, the ratio of the platform height H of the three-pivot shaft 1 to the major diameter d of the internal spline 13 is set to be 0.55-0.65, preferably 0.6-0.65, and the optimal ratio is 0.6, wherein the platform height H specifically refers to the minimum vertical distance from the center of the connecting hole 12 to the connecting position of the shaft head 11 on the three-pivot shaft 1. According to the invention, by increasing the height H of the platform, the connection strength of the shaft head 11 on the three-pivot shaft 1 is improved, and the three-pivot shaft 1 and the universal joint outer member 2 are assembled more tightly on the basis of not changing the maximum outer diameter of the universal joint outer member 2.
In a preferred embodiment of the invention, the ratio of the shaft diameter A of the shaft head 11 to the distribution circle diameter PCD of the roller 3 is 0.517-0.537, and the optimal ratio is 0.527. Compared with the existing three-pivot, the invention further increases the shaft diameter of the shaft head 11, improves the strength of the shaft head 11 and simultaneously increases the outer surface area of the shaft head 11, so that more roller pins can be accommodated in the space between the shaft head 11 and the roller 3, the stress on each roller pin is reduced, the risk of fatigue failure of the roller pins is reduced, and the service life of the roller pins is prolonged.
In conclusion, the three-pivot universal joint has the advantages that the strength of the original weak parts is improved and the internal parts are more compact by adjusting the relevant sizes of the parts in the three-pivot universal joint on the premise of not changing the maximum outer diameter of the universal joint outer part, so that the high-strength requirement of an electric automobile is met, and the comfort of the electric automobile is improved.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (5)
1. A high-strength compact type three-pivot universal joint comprises three pivots (1) and a roller (3), wherein a shaft head (11) on the three pivots (1) is rotatably arranged in an inner cavity of the roller (3), an internal spline (13) is arranged on the inner wall of the three pivots (1), and the high-strength compact type three-pivot universal joint is characterized in that,
the ratio of the outer diameter of the roller (3) to the diameter of the distribution circle of the roller (3) is 0.915-0.935;
the ratio of the shaft diameter of the shaft head (11) to the diameter of the distribution circle of the roller (3) is 0.517-0.537;
the ratio of the width of the roller (3) to the outer diameter of the roller (3) is 0.21-0.25;
the ratio of the platform height of the three pivots (1) to the major diameter of the inner spline (13) is 0.55-0.65.
2. A triple-pivot joint according to claim 1, characterised in that the ratio of the outer diameter of the roller (3) to the diameter of the circle on which the roller (3) is distributed is 0.925.
3. A triple-pivot joint according to claim 1, characterised in that the ratio of the width of the roller (3) to the outer diameter of the roller (3) is 0.23.
4. A triple-pivot joint according to claim 1, characterised in that the ratio of the platform height of the triple pivot (1) to the major diameter of the internal spline (13) is 0.6.
5. A triple-pivot joint according to claim 1, characterised in that the ratio of the diameter of the shaft head (11) to the diameter of the circle on which the rollers (3) are distributed is 0.527.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910655365.0A CN112240354B (en) | 2019-07-19 | 2019-07-19 | High-strength compact type three-pivot universal joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910655365.0A CN112240354B (en) | 2019-07-19 | 2019-07-19 | High-strength compact type three-pivot universal joint |
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| Publication Number | Publication Date |
|---|---|
| CN112240354A CN112240354A (en) | 2021-01-19 |
| CN112240354B true CN112240354B (en) | 2021-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910655365.0A Active CN112240354B (en) | 2019-07-19 | 2019-07-19 | High-strength compact type three-pivot universal joint |
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| CN (1) | CN112240354B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1196112A (en) * | 1995-07-04 | 1998-10-14 | 德国Gkn汽车有限公司 | Tripode type constant velocity ratio universal joints |
| CN1576629A (en) * | 2003-07-16 | 2005-02-09 | Gkn传动***国际有限公司 | Constant velocity joint |
| CN1840925A (en) * | 2005-03-31 | 2006-10-04 | Ntn株式会社 | Tripod type constant velocity universal joint |
| CN102405357A (en) * | 2009-04-20 | 2012-04-04 | Ntn株式会社 | Tripod constant-velocity universal joint and method for producing the same |
| CN104513883A (en) * | 2013-10-07 | 2015-04-15 | 本田技研工业株式会社 | Thermal treatment device for external connector part and manufacture method for external connector part |
| CN105299071A (en) * | 2014-07-08 | 2016-02-03 | Ntn株式会社 | Tripod-type constant-velocity universal joint |
| CN107120356A (en) * | 2017-06-28 | 2017-09-01 | 上海纳铁福传动***有限公司 | Double rollers three pin-type moves universal joint |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100741308B1 (en) * | 2005-12-27 | 2007-07-23 | 한국프랜지공업 주식회사 | Structure for tripod constant velocity joint and method for assembling of roller assembly |
| US8568244B2 (en) * | 2011-02-09 | 2013-10-29 | Hyundai Wia Corporation | Tripod constant velocity joint |
| CN105909685A (en) * | 2016-06-02 | 2016-08-31 | 温州市冠盛汽车零部件集团股份有限公司 | Tripod universal joint and heavy load type transmission shaft assembly |
-
2019
- 2019-07-19 CN CN201910655365.0A patent/CN112240354B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1196112A (en) * | 1995-07-04 | 1998-10-14 | 德国Gkn汽车有限公司 | Tripode type constant velocity ratio universal joints |
| CN1576629A (en) * | 2003-07-16 | 2005-02-09 | Gkn传动***国际有限公司 | Constant velocity joint |
| CN1840925A (en) * | 2005-03-31 | 2006-10-04 | Ntn株式会社 | Tripod type constant velocity universal joint |
| CN102405357A (en) * | 2009-04-20 | 2012-04-04 | Ntn株式会社 | Tripod constant-velocity universal joint and method for producing the same |
| CN104513883A (en) * | 2013-10-07 | 2015-04-15 | 本田技研工业株式会社 | Thermal treatment device for external connector part and manufacture method for external connector part |
| CN105299071A (en) * | 2014-07-08 | 2016-02-03 | Ntn株式会社 | Tripod-type constant-velocity universal joint |
| CN107120356A (en) * | 2017-06-28 | 2017-09-01 | 上海纳铁福传动***有限公司 | Double rollers three pin-type moves universal joint |
Non-Patent Citations (1)
| Title |
|---|
| 三球销式万向节结构主参数的标准化与系列化设计;石宝枢;《轴承》;20081231;第9-15页 * |
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| CN112240354A (en) | 2021-01-19 |
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