CN201884466U - Ball spline group and spline shaft thereof - Google Patents
Ball spline group and spline shaft thereof Download PDFInfo
- Publication number
- CN201884466U CN201884466U CN2010206273300U CN201020627330U CN201884466U CN 201884466 U CN201884466 U CN 201884466U CN 2010206273300 U CN2010206273300 U CN 2010206273300U CN 201020627330 U CN201020627330 U CN 201020627330U CN 201884466 U CN201884466 U CN 201884466U
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- ball
- splined shaft
- rail slot
- axis
- spline group
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Abstract
A ball spline group comprises a spline shaft, an outer drum and two end covers. The spline shaft is provided with a shaft body and a plurality of track grooves, the shaft body is provided with a middle shaft, and the track grooves are arranged on the surface of the shaft body and symmetric to each other relative to the middle shaft. The outer drum is provided with a plurality of roller grooves, and the track grooves and the roller grooves correspondingly form a plurality of roller channels. The end covers are sleeved on the spline shaft and respectively arranged at two ends of the outer drum. The utility model additionally discloses the spline shaft. The ball spline group has the advantages of high rigidity, high precision, low cost and easiness in processing.
Description
Technical field
The utility model is about a kind of ball spline group and splined shaft thereof, particularly about a kind of ball spline group and splined shaft thereof of rail slot symmetry.
Background technique
In various ball spline groups, splined shaft has been played the part of the core roles of carrying and motor function simultaneously, must possess enough rigidity on the one hand, to provide the ball spline group enough support forces, high required precision is structurally arranged again on the other hand, not good with the operational effectiveness of avoiding whole assembly, or produce abnormal sound.
Fig. 1 is the schematic representation of known splined shaft when processing and fabricating.What need explanation earlier is that known splined shaft is the rail slot that three balls are set, and any angulation between the two is 120 ° a angle.Please refer to shown in Figure 1ly, in the processing procedure process, at first workpiece 11 is arranged on fixing device 12, and the position that makes predetermined processing is towards lapping device 13.After device 13 to be ground grinds and finishes a rail slot, rotate 120 ° by mechanism's (figure does not show) holding workpiece 11 in addition, again in next predeterminated position processing grinding with chuck and rotation calibration function.So, workpiece 11 must just can be made a splined shaft via three polish process and twice rotation start.
By above-mentioned complicated operation as can be known, the fabricating cost height of splined shaft, the rotation that not only is workpiece 11 is time-consuming, and each grinding only can be made a rail slot, makes prolong man-hour, in addition aspect precision, the also external force that can in each the grinding, only bear an axial Y because of workpiece 11, after being summed into gravity own, the as easy as rolling off a log structural bending that causes is out of shape, and influences the finished product yield.In addition, when carrying out angle-differentiated and rotating, also the problem of Chang Yinwei location and measurement causes departing from or error of abrasion site, is another big factors that reject ratio produces.Moreover the mechanism of tool rotation calibration function itself belongs to the tailored version board, complex structure, and application cost is also high.
Therefore, how to provide a kind of processing procedure simple, be easy to processing, and the ball spline group of tool highi degree of accuracy and high-reliability and splined shaft thereof have become an important problem.In addition, the splined shaft of this ball spline group is preferably to be wanted and can share machine table with the workpiece of other type, with further saving equipment cost.
The model utility content
Because above-mentioned problem, it is simple that the purpose of this utility model provides a kind of processing procedure, is easy to processing and the ball spline group and the splined shaft thereof of tool highi degree of accuracy and high-reliability.In addition, the splined shaft of this ball spline group is shared machine table than the workpiece of Canon and other type, with further saving equipment cost.
The utility model can be realized by the following technical solutions.
Comprise a body and most rail slot according to a kind of splined shaft of the present utility model.The axle body has an axis.The relative axis of described rail slot is symmetricly set on the surface of a body.
In part embodiment of the present utility model, described rail slot is the surface that relative axis is arranged on the axis left and right sides in pairs.
In an embodiment of the present utility model, the groove face of each rail slot is respectively Goethe's formula circular arc.
In an embodiment of the present utility model, relative axis and two rail slots being arranged on homonymy have an angle, and the scope of angle is that 30 degree are to 140 degree.
Comprise a splined shaft, a urceolus and two end caps according to a kind of ball spline group of the present utility model.Splined shaft has a body and most rail slot.The axle body has an axis, and the relative axis of described rail slot is symmetricly set on the surface of a body.Urceolus is sheathed and be slidingly arranged in splined shaft.Urceolus has most ball grooves, and rail slot and the corresponding ball channel that forms of ball grooves.End cap is set in splined shaft, and is separately positioned on the two ends of urceolus.
In part embodiment of the present utility model, urceolus has most circulation canals, and each end cap has most return flow lines.The position, return flow line is at the two ends of ball channel and circulation canal, and corresponding ball channel, circulation canal and return flow line form most ball circulation paths jointly.Wherein, the ball spline group also comprises most balls, is contained in ball circulation paths.
In an embodiment of the present utility model, described rail slot is the surface that relative axis is arranged on the axis left and right sides in pairs.
In an embodiment of the present utility model, the groove face of each rail slot is respectively Goethe's formula circular arc.
In part embodiment of the present utility model, two rail slots that are arranged on the axis left and right sides have an angle, and the scope of angle is that 30 degree are to 140 degree.
From the above, be the rail slot that symmetry is set by the surface at splined shaft according to ball spline group of the present utility model and splined shaft thereof, to form the low ball spline group of high rigidity, highi degree of accuracy and processing cost.Specifically, splined shaft of the present utility model utilize rail slot relatively in axisymmetric characteristic, the abrasive machining operation can be implemented by relative both sides simultaneously, not only exempt the easy operations that produce error such as rotation and location, effectively improve finished product accuracy, more save the cost that uses special equipment and repeatedly repeat operation.Moreover, because application of force direction is symmetrical, the bending deflection that unbalance stress is caused in the time of can significantly reducing workpiece because of abrasive machining.Compare with known technology, ball spline group of the present utility model and splined shaft thereof not only have above-mentioned advantage, also can further share same grinder station with other workpiece as types such as slide rails, increase the production product item of single manufacturer, promote competitive ability.
Description of drawings
Fig. 1 is the schematic representation of known splined shaft when processing and fabricating;
Fig. 2 is the decomposing schematic representation according to the ball spline group of the utility model preferred embodiment;
Fig. 3 is the sectional drawing of splined shaft shown in Figure 2;
Fig. 4 is the decomposing schematic representation of the ball spline group of another preferred embodiment of the utility model;
Fig. 5 A is according to the ball spline group of the another preferred embodiment of the utility model schematic representation at the directional profile of vertical splined shaft; And
Fig. 5 B is the enlarged diagram of the regional Z shown in Fig. 5 A.
The primary component symbol description:
11: workpiece
12: fixing device
13: lapping device
2,4,5: the ball spline group
21,41,51: splined shaft
211,411: the axle body
212,212a, 212b, 212c, 212d, 412,412a, 412b, 412c, 412d, 512: rail slot
213,413,513: axis
214,414: the surface
22,42,52: urceolus
221,421: locating slot
222,422,522: ball grooves
223,423: circulation canal
23,43,53: ball distance ring
231,431: positioning rib
232,432: the ball perforate
233,433: guide portion
24,44: end cap
241,441: the return flow line
25,45,55: ball
424: flange
L, R, A: arrow
RP, RP ': ball circulation paths
S1, S2, S3: straight line
Y: axially
Z: zone
θ, θ ': angle
Embodiment
Hereinafter with reference to correlative type, a kind of ball spline group and splined shaft thereof according to the utility model preferred embodiment are described, wherein same components is represented with same-sign.
Fig. 2 is the decomposing schematic representation according to the ball spline group of the utility model preferred embodiment, and Fig. 3 is the sectional drawing of splined shaft shown in Figure 2.Please refer to shown in Figure 2ly, in the present embodiment, ball spline group 2 comprises a splined shaft 21, a urceolus 22, a ball distance ring 23, two end caps 24 and most ball 25.
Below, cooperate with reference to figure 3, earlier the course of working and the structure characteristic of explanation splined shaft 21.Please refer to shown in Figure 3, splined shaft 21 has a body 211 and most rail slot 212, in the present embodiment, is that to have four rail slots 212 with splined shaft 21 be example, and for convenience of description, it further can be divided into rail slot 212a, 212b, 212c, 212d.Axle body 211 has an axis 213, and four rail slot 212 relative axis 213 are symmetricly set on the surface 214 of a body 211.Further define alleged " being symmetrical arranged " of present embodiment, it means with a straight line by axis is reference center, in the both sides of this straight line, has the rail slot of equal number.In aspect shown in Figure 3, be that each side to have two rail slots 212 respectively with the straight line S1 vertical with horizontal line be example, and rail slot 212a and rail slot 212b and rail slot 212c and rail slot 212d are that relative axis 213 is symmetricly set on the surface 214 of a body 211 left and right sides in pairs.
Need benly to be, the number of above-mentioned rail slot 212 does not exceed with four, looks closely the needs in the application, and is principle to be symmetrical arranged with respect to axis 213, so in other embodiments, splined shaft can have for example six or eight rail slots.Moreover the also non-limiting size of symmetrical rail slot 212, radian or shape are identical.In addition, what deserves to be explained is, compared to the design of three of known uses, the utility model be provided with four or even the rail slot more than four 212, also can effectively promote rigidity and load capacity.
Be with, please refer to shown in Figure 3, splined shaft 21 with said structure is when making, can see through its special rail slot 212 configuration modes, make lapping device implement processing grinding simultaneously on the surface, the left and right sides 214 of workpiece, a plurality of rail slots 212 are completed in once-through operation, also do not need to set up in addition simultaneously the rotary indexer structure.Moreover, because of the application of force direction (shown in arrow L, R among Fig. 3) of grinding also is mutually symmetrical,, avoid workpiece only to be subjected to unidirectional external force so can repeal by implication to a certain extent at every turn, cause bending deflection.
Two rail slots 212 that are arranged on the straight line S1 left and right sides by axis 213 have an angle theta, its angular range can be by 30 ° to 140 °, be to be the example explanation in the present embodiment to have 60 ° angle between rail slot 212a and rail slot 212c, but not as limit, look closely the needs of application purpose and carrying object, and can be principle with urceolus 22 and ball distance ring 23 corresponding matching.
Please again with reference to shown in Figure 2, urceolus 22 is sheathed and be slidingly arranged in splined shaft 21, have most locating slots 221 and the most ball grooves 222 corresponding with rail slot 212 numbers, in the present embodiment, be to have two locating slots 221 and four ball grooves 222 are example, but, require and design according to different not as limit with urceolus 22, urceolus 22 also can have one, two or three locating slots 221, perhaps also can more than four locating slots 221.
In addition, ball distance ring 23 also can have a guide portion 233 and rail slot 212 corresponding connections, reflux and avoid the rotational displacement of ball distance ring 23 with further guiding ball 25, yet guide portion 233 the non-restrictive condition that is is set.
Please refer to shown in Figure 2ly, in the present embodiment, two end caps 24 are set in splined shaft 21 respectively, and are separately positioned on the two ends of urceolus 22.In addition, urceolus 22 also has most circulation canals 223, and each end cap 24 has most return flow lines 241, in the present embodiment, be to have four circulation canals 223 and each end cap 24 with urceolus 22 to have four return flow lines 241 be example, with aforementioned other modular constructions of correspondence, but not as limit.241 of return flow lines are at the two ends of ball channel and circulation canal 233, and ball channel, circulation canal 233 and return flow line 241 are common forms most ball circulation paths RP.Ball 25 then is arranged on ball circulation paths RP.What need to specify is, Fig. 2 shows for clear, end cap 24 only show four return flow lines 241 one of them.
Fig. 4 is the decomposing schematic representation of the ball spline group of another preferred embodiment of the utility model.Please refer to shown in Figure 4ly, the ball spline group of present embodiment 4 is roughly the same with previous embodiment, has a flange 424 yet difference is urceolus 42.Whereby, can increase the application area of ball spline group 4 of the present utility model.
Fig. 5 A is according to the ball spline group of the another preferred embodiment of the utility model schematic representation at the directional profile of vertical splined shaft, and Fig. 5 B is the enlarged diagram of the regional Z shown in Fig. 5 A.Please refer to shown in Fig. 5 A, the ball spline group 5 of present embodiment is roughly the same with the ball spline group 2 of previous embodiment, and only the groove face of the ball grooves 522 of the rail slot 512 of splined shaft 51 and urceolus 52 is respectively Goethe's formula circular arc.Be with, please refer to shown in Fig. 5 B, ball 55 is contained in when carrying out shuttling movement in the ball channel, its ball-type surface can't be fitted in the groove face of rail slot 512 and ball grooves 522 fully, is the aspect (as the indicated position of arrow A) that is 4 contacts on the contrary.In the present embodiment, the straight line S3 of the point of contact of ball 55 to the axis 513 of the straight line S2 at ball center and splined shaft 51 to the ball center has an angle θ ', in the present embodiment, is that to be 40 ° with angle θ ' be example, and four point of contact are all identical, but non-be restricted.In other embodiments, above-mentioned angle θ ' also can optionally adjust, and for example is 45 °, and the utility model is not limit at this.
The utility model discloses a kind of splined shaft that is used in for example above-mentioned ball spline group in addition, yet its technology contents and configuration and aforementioned a plurality of embodiments' splined shaft is roughly the same, does not repeat them here.
In sum, be the rail slot that symmetry is set by the surface at splined shaft according to ball spline group of the present utility model and splined shaft thereof, to form the low ball spline group of high rigidity, highi degree of accuracy and processing cost.Specifically, splined shaft of the present utility model utilize rail slot relatively in axisymmetric characteristic, the abrasive machining operation can be implemented by relative both sides simultaneously, not only exempt the easy operations that produce error such as rotation and location, effectively improve finished product accuracy, more save the cost that uses special equipment and repeatedly repeat operation.Moreover, because application of force direction is symmetrical, the bending deflection that unbalance stress is caused in the time of can significantly reducing workpiece because of abrasive machining.Compare with known technology, ball spline group of the present utility model and splined shaft thereof not only have above-mentioned advantage, also can further share same grinder station with other workpiece as types such as slide rails, increase the production product item of single manufacturer, promote competitive ability.
The above only is an illustrative, and non-limiting.Anyly do not break away from spirit of the present utility model and category, and, all should be included in the claim institute restricted portion its equivalent modifications of carrying out or change.
Claims (10)
1. a splined shaft is characterized in that, comprising:
A body has an axis; And
Most rail slots, described relatively axis are symmetricly set on the surface of described axle body.
2. splined shaft according to claim 1 is characterized in that, described rail slot is the described surface that described relatively axis is arranged on the described axis left and right sides in pairs.
3. splined shaft according to claim 1 is characterized in that, the groove face of each described rail slot is respectively Goethe's formula circular arc.
4. splined shaft according to claim 1 is characterized in that, wherein described relatively axis and two described rail slots being arranged on homonymy have an angle, and the scope of described angle is that 30 degree are to 140 degree.
5. a ball spline group is characterized in that, comprising:
One splined shaft has a body and most rail slot, and described axle body has an axis, and the described relatively axis of described rail slot is symmetricly set on the surface of described axle body;
One urceolus, sheathed and be slidingly arranged in described splined shaft, described urceolus has most ball grooves, and described rail slot and described ball grooves are corresponding forms most ball channels; And
Two end caps are set in described splined shaft, and are separately positioned on the two ends of described urceolus.
6. ball spline group according to claim 5 is characterized in that, described rail slot is the described surface that described relatively axis is arranged on the described axis left and right sides in pairs.
7. ball spline group according to claim 5 is characterized in that, the groove face of each described rail slot is respectively Goethe's formula circular arc.
8. ball spline group according to claim 5 is characterized in that, wherein described relatively axis and two described rail slots being arranged on homonymy have an angle, and the scope of described angle is that 30 degree are to 140 degree.
9. ball spline group according to claim 5, it is characterized in that, described urceolus has most circulation canals, each end cap has most return flow lines, position, described return flow line is at the two ends of described ball channel and described circulation canal, and corresponding described ball channel, described circulation canal and described return flow line form most ball circulation paths jointly.
10. ball spline group according to claim 9 is characterized in that, also comprises:
Most balls are contained in described ball circulation paths.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206273300U CN201884466U (en) | 2010-11-26 | 2010-11-26 | Ball spline group and spline shaft thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206273300U CN201884466U (en) | 2010-11-26 | 2010-11-26 | Ball spline group and spline shaft thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201884466U true CN201884466U (en) | 2011-06-29 |
Family
ID=44182008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206273300U Expired - Lifetime CN201884466U (en) | 2010-11-26 | 2010-11-26 | Ball spline group and spline shaft thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201884466U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103707171A (en) * | 2012-09-28 | 2014-04-09 | 全球传动科技股份有限公司 | Abrasive machining method for outer barrel and inner ball grooves of ball spline set |
| CN104565030A (en) * | 2013-10-22 | 2015-04-29 | 上银科技股份有限公司 | Linear-transmission ball spline device |
| CN107000014A (en) * | 2014-11-26 | 2017-08-01 | 蒂森克虏伯普利斯坦股份公司 | The method and flexible steering spindle of the Special hollow axle of the flexible steering spindle of production |
| CN107542770A (en) * | 2016-06-24 | 2018-01-05 | 锕玛科技股份有限公司 | Ball spline axle construction and its manufacture method |
| CN112589608A (en) * | 2020-12-09 | 2021-04-02 | 陕西涵阳机械有限责任公司 | Grinding process of ball spline shaft raceway |
-
2010
- 2010-11-26 CN CN2010206273300U patent/CN201884466U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103707171A (en) * | 2012-09-28 | 2014-04-09 | 全球传动科技股份有限公司 | Abrasive machining method for outer barrel and inner ball grooves of ball spline set |
| CN104565030A (en) * | 2013-10-22 | 2015-04-29 | 上银科技股份有限公司 | Linear-transmission ball spline device |
| CN104565030B (en) * | 2013-10-22 | 2017-05-10 | 上银科技股份有限公司 | Linear-transmission ball spline device |
| CN107000014A (en) * | 2014-11-26 | 2017-08-01 | 蒂森克虏伯普利斯坦股份公司 | The method and flexible steering spindle of the Special hollow axle of the flexible steering spindle of production |
| US10634184B2 (en) | 2014-11-26 | 2020-04-28 | Thyssenkrupp Ag | Method for producing a profiled hollow shaft for a telescopic steering shaft and telescopic steering shaft |
| CN107542770A (en) * | 2016-06-24 | 2018-01-05 | 锕玛科技股份有限公司 | Ball spline axle construction and its manufacture method |
| CN112589608A (en) * | 2020-12-09 | 2021-04-02 | 陕西涵阳机械有限责任公司 | Grinding process of ball spline shaft raceway |
| CN112589608B (en) * | 2020-12-09 | 2023-08-01 | 陕西涵阳机械有限责任公司 | Grinding technology for ball spline shaft roller path |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110629 |
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| CX01 | Expiry of patent term |