CN112303119A - Ball spline shaft pair with through hole in middle - Google Patents
Ball spline shaft pair with through hole in middle Download PDFInfo
- Publication number
- CN112303119A CN112303119A CN202010545835.0A CN202010545835A CN112303119A CN 112303119 A CN112303119 A CN 112303119A CN 202010545835 A CN202010545835 A CN 202010545835A CN 112303119 A CN112303119 A CN 112303119A
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- CN
- China
- Prior art keywords
- ball spline
- spline shaft
- ball
- shaft
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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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
- F16C29/00—Bearings for parts moving only linearly
- F16C29/04—Ball or roller bearings
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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
- F16D3/02—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions
- F16D3/06—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions specially adapted to allow axial displacement
- F16D3/065—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions specially adapted to allow axial displacement by means of rolling elements
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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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bearings For Parts Moving Linearly (AREA)
Abstract
A ball spline shaft pair with a through hole in the middle is used in occasions requiring large displacement compensation or frequent axial expansion and contraction in a transmission device. The ball spline shaft is inserted in the ball spline sleeve, a plurality of rows of raceways are processed on the ball spline shaft and the ball spline sleeve, a ball retainer is arranged on the ball spline shaft and the ball spline sleeve, a ball hole corresponding to the raceways is formed in the ball retainer along the axial direction, balls are embedded in the ball hole to roll along the raceways, torque transmission and telescopic sliding are realized, the other end of the ball spline sleeve is welded with the connecting shaft into a whole, and through holes are processed on the ball spline shaft and the connecting shaft. The structural design of the ball spline shaft and the connecting shaft with the through hole in the middle can keep the air pressure balance between the inside of the ball spline shaft pair and the connecting parts at two sides and reduce the sliding resistance generated by the change of the air pressure; the lip seal is used at the auxiliary opening part of the ball spline shaft, so that the effects of dust prevention, water prevention and grease leakage prevention can be achieved, the special environment adaptability of the ball spline shaft pair for field, water, land amphibious and the like is improved, and the service life of the ball spline shaft pair is prolonged.
Description
Technical Field
The invention relates to the technical field of transmission devices, in particular to a ball spline shaft pair with a through hole in the middle.
Background
In the field of the existing transmission device, the ball spline pair has been replaced by a sliding friction pair more and more due to the good rolling friction, small resistance, stable operation and other performances, but the application of the ball spline pair still has great limitation. The conventional ball spline pair structure has insufficient sealing performance and is difficult to adapt to the working requirements of special environments such as field, water and land amphibious and the like; or the internal air pressure is closed and lacks circulation, and extra sliding resistance can be generated along with the change of the air pressure in the axial stretching process, so that the transmission effect is influenced, and the service life is prolonged.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a ball spline shaft pair with a through hole in the middle, so as to realize application in the transmission occasions requiring large displacement compensation or frequent axial expansion and contraction.
In order to achieve the purpose, the power of the ball spline shaft pair is input from the end of the ball spline shaft, the ball spline shaft is inserted into the ball spline sleeve, a plurality of rows of raceways are processed on the ball spline shaft and the ball spline sleeve, a ball retainer is arranged between the ball spline shaft and the ball spline sleeve, the ball retainer is axially provided with a ball hole corresponding to the raceways, balls are embedded in the ball hole and roll along the raceways, so that the torque transmission and the axial telescopic sliding of the ball spline shaft pair are realized, and the other end of the ball spline sleeve is welded with the connecting shaft into a whole to realize the power output of the ball spline shaft pair; the ball spline shaft and the connecting shaft are respectively provided with a through hole which can keep the air pressure balance between the inside of the ball spline shaft pair and connecting parts at two sides, reduce the sliding resistance caused by the change of the air pressure and realize the weight reduction.
And a first shaft retaining ring and a second shaft retaining ring which are used for limiting the ball retainer and ensuring that the balls always work at proper positions are arranged on two sides of a rolling path of the ball spline shaft, the second shaft retaining ring is arranged on the inner side of a shaft shoulder of the ball spline shaft, and the distance between the shaft shoulder and the lip seal is greater than the working tensile length of the ball spline shaft.
And a lip seal for preventing dust, water and grease leakage of the ball spline shaft pair is arranged between the opening part of the ball spline sleeve and the ball spline shaft, and is axially fixed by a hole retaining ring.
Compared with the prior art, the invention adopts the structural design of the ball spline shaft and the connecting shaft with the through hole in the middle, can keep the air pressure balance between the inside of the ball spline shaft pair and the connecting parts at the two sides, and reduces the sliding resistance generated by the change of the air pressure; the lip seal is used at the auxiliary opening part of the ball spline shaft, so that the effects of dust prevention, water prevention and grease leakage prevention can be achieved, the adaptability of the auxiliary ball spline shaft to special environments such as field, water and land amphibious environments is improved, and the service life of the auxiliary ball spline shaft is prolonged. The invention has simple and compact structure and convenient installation and use, and is mainly used for occasions requiring larger displacement compensation or frequent axial extension and retraction in a transmission device.
Drawings
FIG. 1 is a schematic diagram of the present invention.
In the figure: 1. a connecting shaft; 2. a ball spline housing; 3. a first shaft retainer ring; 4. a ball bearing; 5. a ball retainer; 6. a second shaft retainer ring; 7. lip seal; 8. a hole retainer ring; 9. a ball spline shaft; 10. a shaft shoulder; 11. and a through hole.
Detailed Description
As shown in fig. 1, the power of the ball spline shaft pair of the present invention is generally input from the end of the ball spline shaft 9, the ball spline shaft 9 is inserted into the ball spline housing 2, a plurality of rows of corresponding raceways are formed on the ball spline shaft 9 and the ball spline housing 2, a ball retainer 5 is disposed between the ball spline shaft 9 and the ball spline housing 2, the ball retainer 5 is axially provided with a ball hole corresponding to the raceway, balls 4 are embedded in the ball hole and roll along the raceway, so as to realize torque transmission and axial telescopic sliding of the ball spline shaft pair, and the other end of the ball spline housing 2 is welded with the connecting shaft 1 into a whole, so as to realize the power output of the ball spline shaft pair. The ball spline shaft pair structure can reduce the sliding resistance of the middle telescopic shaft (under the same working condition, because the rolling friction is much smaller than the maximum static friction and the sliding friction, under the general condition, the rolling friction is only 1/40 to 1/60 of the sliding friction resistance), reduce the friction heating, and more flexibly and quickly respond to the telescopic requirement of the length change of occasions requiring larger displacement compensation or frequent axial telescopic transmission.
A first shaft retaining ring 3 and a second shaft retaining ring 6 are installed on two sides of a rolling path of the ball spline shaft 9, the ball retainer 5 can be limited, balls 4 are guaranteed to work in proper positions all the time, the second shaft retaining ring 6 is arranged on the inner side of a shaft shoulder 10 of the ball spline shaft 9, the distance between the shaft shoulder 10 and the lip seal 7 is larger than the work stretching length of the ball spline shaft, and therefore interference between the shaft shoulder 10 and the lip seal 7 is avoided when the ball spline shaft 9 works in the stretching process.
Through holes 11 are formed in the ball spline shaft 9 and the connecting shaft 1, so that air pressure balance between the inside of the ball spline shaft pair and connecting parts on two sides can be kept, sliding resistance caused by air pressure change is reduced, and a weight reduction effect can be achieved.
A lip seal 7 is arranged between the opening part of the ball spline housing 2 and the ball spline shaft 9 and is axially fixed by a hole retainer ring 8, and the lip seal 7 can play a role in preventing dust, water and grease leakage of the ball spline shaft pair, so that the service life of the ball spline shaft pair is prolonged, and the maintenance or replacement cost is reduced; meanwhile, water or impurities can be prevented from entering the transmission part of the ball spline shaft pair, the corrosion rate of parts is reduced, the internal lubricating environment is protected, the transmission resistance is reduced, and the working requirement of the ball spline shaft pair in a special environment is met.
Claims (3)
1. The utility model provides a take ball spline shaft of through-hole in the middle of is vice which characterized in that: the power of the ball spline shaft pair is input from the end of the ball spline shaft (9), the ball spline shaft (9) is inserted in the ball spline sleeve (2), a plurality of rows of raceways are processed on the ball spline shaft (9) and the ball spline sleeve (2), a ball retainer (5) is arranged between the ball spline shaft (9) and the ball spline sleeve (2), the ball retainer (5) is axially provided with a ball hole corresponding to the raceway, balls (4) are embedded in the ball hole and roll along the raceway, so that the torque transmission and the axial telescopic sliding of the ball spline shaft pair are realized, and the other end of the ball spline sleeve (2) is welded with the connecting shaft (1) into a whole to realize the power output of the ball spline shaft pair; the ball spline shaft (9) and the connecting shaft (1) are respectively provided with a through hole (11) which can keep the air pressure balance between the inside of the ball spline shaft pair and connecting parts at two sides, reduce the sliding resistance caused by air pressure change and realize weight reduction.
2. The ball spline shaft pair with a through hole in the middle as set forth in claim 1, wherein: a first shaft retainer ring (3) and a second shaft retainer ring (6) which are used for limiting the ball retainer (5) and ensuring that the balls (4) always work at proper positions are arranged on two sides of the raceway of the ball spline shaft (9); the second shaft retainer ring (6) is arranged on the inner side of a shaft shoulder (10) of the ball spline shaft (9), and the distance between the shaft shoulder (10) and the lip seal (7) is greater than the working stretching length of the ball spline shaft (9).
3. The ball spline shaft pair with a through hole in the middle as set forth in claim 1, wherein: a lip-shaped seal (7) for preventing dust, water and grease leakage of the ball spline shaft pair is arranged between the opening part of the ball spline housing (2) and the ball spline shaft (9), and is axially fixed by a hole retainer ring (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010545835.0A CN112303119A (en) | 2020-06-16 | 2020-06-16 | Ball spline shaft pair with through hole in middle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010545835.0A CN112303119A (en) | 2020-06-16 | 2020-06-16 | Ball spline shaft pair with through hole in middle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112303119A true CN112303119A (en) | 2021-02-02 |
Family
ID=74336467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010545835.0A Pending CN112303119A (en) | 2020-06-16 | 2020-06-16 | Ball spline shaft pair with through hole in middle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112303119A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810845A (en) * | 2022-04-28 | 2022-07-29 | 洛阳轴承研究所有限公司 | Spline transmission device capable of realizing self-elimination of transmission side clearance |
| CN117052802A (en) * | 2023-10-11 | 2023-11-14 | 万向钱潮股份公司 | Transmission shaft capable of silencing and reducing noise |
-
2020
- 2020-06-16 CN CN202010545835.0A patent/CN112303119A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810845A (en) * | 2022-04-28 | 2022-07-29 | 洛阳轴承研究所有限公司 | Spline transmission device capable of realizing self-elimination of transmission side clearance |
| CN117052802A (en) * | 2023-10-11 | 2023-11-14 | 万向钱潮股份公司 | Transmission shaft capable of silencing and reducing noise |
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| SE01 | Entry into force of request for substantive examination | ||
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