CN104565030A - Linear-transmission ball spline device - Google Patents
Linear-transmission ball spline device Download PDFInfo
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- CN104565030A CN104565030A CN201310497988.2A CN201310497988A CN104565030A CN 104565030 A CN104565030 A CN 104565030A CN 201310497988 A CN201310497988 A CN 201310497988A CN 104565030 A CN104565030 A CN 104565030A
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- ball spline
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Abstract
The invention discloses a linear-transmission ball spline device. The linear-transmission ball spline device comprises a spline shaft and a moving body, wherein a plurality of rolling grooves are formed in the surface of the spline shaft; the moving body comprises a body, two reflowing components and a plurality of rolling components; the body is provided with a perforated hole for sleeving of the spline shaft; the perforated hole is provided with rolling slots corresponding to the rolling grooves; the rolling grooves and the rolling slots form a load path; a mounting hole is formed in each of the two ends of the perforated hole; the two reflowing components are accommodated inside the mounting holes respectively; each reflowing component is provided with reflowing passages with the number corresponding to that of the rolling slots; outlines of the reflowing passages are U-shaped; the two ends of each reflowing passage are jointed with the load path and reflowing holes respectively to form a circulating path; the rolling components are arranged inside the circulating path. By adopting the structure, the linear-transmission ball spline device can give full play to original functions, outside diameters of nut components can be extremely minimized, and the assembling workhour is saved; the linear-transmission ball spline device is cheap, and easy and convenient to manufacture, and the quality reliability can be retained.
Description
Technical field
The present invention is a kind of Linear transmission assembly, espespecially a kind of Linear transmission ball spline device.
Background technique
The invention relates to and make splined shaft and nut component be combined into the transmitting assemblies of linear relative movement through most ball, be used in the ball spline device of the straight line guide portion of work mechanism or various industrial machine or the moment of torsion communication portion of industrial robot etc.
Known, this kind of ball spline device there will be a known Japanese Unexamined Patent Publication 61-179414 Patent Case or JP 58-137616 Patent Case, the ball spline device disclosed.This ball spline device, be by: have the splined shaft of a plurality of sliding channels extended along length direction; And while being contained in above-mentioned splined shaft through most ball set, the nut component having above-mentioned ball Infinite Cyclic path formed, and the Infinite Cyclic along with ball can make above-mentioned nut component move freely along its length direction around splined shaft.
In addition, the ball Infinite Cyclic path that nut component possesses is by the sliding channel of nut component arranged for ball and the load passage that forms of the sliding channel of splined shaft; With the ball return passage of the parallel formation of this load passage; And form with these load passages and ball return passage the conversion road, U-shaped direction linked and formed.Then, conversion road, above-mentioned direction is configured by the two ends at load passage and ball return passage to form ball Infinite Cyclic road.
Above-mentioned document ball spline device is the gap installing synthetic resin retainer enclosing face and be arranged between this interior splined shaft enclosing face in the nut component forming cylindrical shape, utilizes the cooperation of this retainer and nut component to form ball return passage and conversion road, direction.
In addition, in order to allow the ball rolled at above-mentioned load passage move to ball return passage via direction conversion, need to allow this ball depart from the ball rolling groove of splined shaft.Therefore, known ball spline device is provided with portion in the ball in conversion road, above-mentioned direction is drawn continuously at above-mentioned retainer, make the ball moved at above-mentioned ball sliding channel trough roller cross this portion that drawn to depart from from this ball rolling groove, be formed as being housed in the conversion road, direction that formed by retainer and nut component cooperation.
But, in the known ball spline device of above-mentioned explanation, because being coordinated by retainer and nut component to form ball return passage, so this ball return passage is at least the distance must vacating retainer amount of thickness from splined shaft towards its radial direction.In addition, being formed with conversion road, above-mentioned direction or ball return passage in retainer, is utilize mould to make with synthetic resin ejection formation to realize this complicated shape.Therefore, the ball spline commonly used has following problem points:
If be located in nut component the retainer distortion in face of enclosing, then this retainer will contact splined shaft, causes hindering the motion of nut component, so retainer is difficult to be formed extremely slim.Therefore, with regard to the known ball spline device of accommodating retainer between splined shaft and nut component, the external diameter of nut component can be subject to the impact of retainer thickness, so that becomes large at nut component outside dimension.
Known ball spline device, utilizes above-mentioned retainer to make ball be able to Infinite Cyclic, but this retainer is plastic ejection moulding makes, and its length dimension is all fixing, therefore cannot be applicable to the nut of different length, and versatility is not high.
Summary of the invention
The present invention is the invention being in view of the problems referred to above point, its object is to provide one to give full play to original function, and nut component external diameter can limit miniaturization, and when assembling is not taken a lot of work, inexpensive and easy manufacture the ball spline device of reliability can be maintained again.
For reaching above-mentioned purpose, solution of the present invention is:
A kind of Linear transmission ball spline device, comprises:
One splined shaft, it extends to strip structure towards a direction, and defining this bearing of trend is axle direction, and the surface of this splined shaft is provided with a plurality of axially extended sliding channels;
One moving body, it comprises body, two return pieces and plural roll piece, this body is provided with a perforation supplying splined shaft sheathed, the inner edge surface of this perforation is provided with the rolling groove of relative sliding channel, sliding channel and rolling groove form a load path, and the two ends of this perforation are respectively equipped with a mounting hole, the diameter of mounting hole is greater than the diameter of this perforation and both are interconnected, body is more provided with the relative rolling groove of quantity and is parallel to the return port of rolling groove setting, the two ends of this return port are connected with this mounting hole, and the cross section of this return port is a circle; Two return pieces are placed in two mounting holes respectively, and return piece is provided with the backflow road of the relative rolling groove of quantity, and backflow road profile is a U-shaped, and its two ends are connected with load path and return port respectively and form a circulating path; Plural number roll piece is arranged at circulating path.
By above-mentioned structure, between splined shaft and body, nothing arranges retainer therefore can reduce the external diameter of this body, and this return piece system is arranged at the mounting hole at the two ends of this body, when this body only has axial length change, then this return piece still can be common to this body, therefore improves the versatility of this return piece.
Moreover for making this roll piece obtain preferably smooth degree when this circulating path runs, system of the present invention runs for the most easily causing roll piece the backflow road had some setbacks, and carry out the design of specific path, it is described as follows:
Described backflow road divides into four sections, and these four sections are sequentially connected for the section of climbing, the first meander sections, the second meander sections and joining section respectively; The width in backflow road is greater than the diameter of roll piece.
The described section of climbing part is located in sliding channel, and the section of climbing has a climb altitude and length of climbing, and climb altitude is less than length of climbing, and length of climbing meets this relation: the diameter of Zhi Jing≤Chang Du≤0.5 times roll piece that climbs of 0.25 times of roll piece.
The first described meander sections and the second meander sections form single-revolution section, and the radius of the Internal periphery of this meander sections meets this relation: the diameter of the Ban Jing≤roll piece of the Zhi Jing≤Internal periphery of 0.5 times of roll piece.
The first described meander sections and the second meander sections see it by axle direction, and this first meander sections is made up of the first arc section and the second arc section mutual tangent linking respectively with the bottom profile of the second meander sections, and the center of circle of the first arc section and the second arc section is different; And the length of this first arc section meets this relation: the length of second arc section of the length < 0.8 times of length < first arc section of 0.5 times of second arc section; And first the radius of arc section be less than the radius of the second arc section.
This return piece is fixed on mounting hole for stable by the present invention, inner edge surface depression in mounting hole is provided with the fixed groove of an annular, when this return piece arranges mounting hole, the end face of return piece and the tangent setting of inner side cell wall of fixed groove, one fixed block is arranged at this fixed groove, and this fixed block contacts at the end face of return piece.
By above-mentioned path design, the design of special required climb altitude when roll piece departs from this sliding channel, its climb altitude is dispersed to the definition of the leading portion of this section of climbing and the first meander sections: from the section of climbing and the first meander sections connecting points start to the total length being less than the first meander sections 1/2nd scope, allow roll piece in the climb altitude of the section of climbing compare design in the past low, relatively also reduce its resistance climbed, and can run smooth and easy when making roll piece depart from sliding channel.
Accompanying drawing explanation
Fig. 1 is the system figure of Linear transmission ball spline device of the present invention;
Fig. 2 is the constitutional diagram of Linear transmission ball spline device of the present invention;
Fig. 3 is the A-A sectional view of Fig. 2;
Fig. 4 is the stereogram of the return piece of Linear transmission ball spline device of the present invention;
Fig. 5 is that the path in the backflow road of return piece of the present invention forms schematic diagram;
Fig. 6 is that the path in the backflow road of return piece of the present invention forms schematic diagram, sees it by axle direction;
Fig. 7 is the B-B sectional view of Fig. 5, and the section of the climbing detailing in backflow road is described.
[symbol description]
1 splined shaft 11 sliding channel
2 bodies 21 are bored a hole
211 rolling groove 22 mounting holes
Cell wall inside 23 fixed grooves 231
24 return port 3 return pieces
31 backflow road 32 end faces
The A section of climbing B first meander sections
C second meander sections D joining section
The bottom profile of bottom profile C1 second meander sections of B1 first meander sections
Q points of tangency T roll piece rotary path
The radius of radius R 2 second arc section of R1 first arc section
The width in the Internal periphery radius U backflow road of R3 meander sections
H climb altitude C climbs length
90 load path 100 circulating paths
X axle direction 4 roll piece
The diameter that 5 fixed block D1 bore a hole
Diameter B2, C2 center of circle of D2 mounting hole.
Embodiment
In order to explain technological scheme of the present invention further, below by specific embodiment, the present invention will be described in detail.
Refer to Fig. 1 to Figure 3 shows that a preferred embodiment of the present invention, the present invention is a kind of Linear transmission ball spline device, comprises:
One splined shaft 1, it extends to strip structure towards a direction, and defining this bearing of trend is axle direction X, and the surface of this splined shaft 1 is provided with a plurality of sliding channels 11 that axially X is extended;
One moving body, it comprises body 2, two return pieces 3 and plural roll piece 4, this body 2 is provided with a perforation 21 supplying this splined shaft 1 sheathed, the inner edge surface of this perforation 21 is provided with the rolling groove 211 of this sliding channel 11 relatively, this sliding channel 11 forms a load path 90 with rolling groove 211, and the two ends of this perforation 21 are respectively equipped with a mounting hole 22, the diameter D2 of this mounting hole 22 is greater than the diameter D1 of this perforation 21 and both are interconnected, this body 2 is more provided with quantity this rolling groove 211 relative and is parallel to the return port 24 of this rolling groove 211 setting, the two ends of this return port 24 are connected with this mounting hole 22, the cross section of this return port 24 is a circle, that is this direction, return port 24 footpath is for closing kenel, two these return pieces 3 are placed in two these mounting holes 22 respectively, and this return piece 3 is provided with the backflow road 31 of quantity this rolling groove 211 relative, and this backflow road 31 profile is a U-shaped, and its two ends are connected with this load path 90 and return port 24 and form a circulating path 100 respectively, this plural roll piece 4 is arranged at this circulating path 100.
The present embodiment is in order to fix this return piece 3, inner edge surface depression in this mounting hole 22 is provided with the fixed groove 23 of an annular, when this return piece 3 arranges this mounting hole 22, the end face 32 of this return piece 3 and the tangent setting of inner side cell wall 231 of this fixed groove 23, relend after being arranged at this fixed groove 23 by a fixed block 5, this fixed block 5 contacts at the end face 32 of this return piece 3, to limit the axle direction X degrees of freedom of this return piece 3, and this fixed block 5 is that a C type be made of metal is buckled in the present embodiment, whereby, this return piece 3 is all enveloped by metal material in any direction, please coordinate shown in Fig. 2 and Fig. 3, the direction, footpath of this return piece 3 is coated by this mounting hole 22, and axle direction X one end of this return piece 3 is by this fixed block 5 part this end face 32 coated, its coated scope exceedes 1/2nd of this end face 32 for best, other end is arranged to this perforation 21, ball spline device so can be avoided because of factors such as improper uses, and cause roll piece 4 impact the power in this backflow road 31 excessive time, cause this return piece 3 crack damage (note: because this return piece major part is all manufactured by plastic ejection moulding), now because have metal barrier that roll piece 4 can be avoided to drop out this backflow road 31 around this return piece 3, the equipment installing this ball spline device can be avoided, equipment is made to lose the degrees of freedom originally limited because roll piece 4 departs from this body 2 and splined shaft 1 completely, and cause the associated components of equipment mutually clash into and damage, therefore the present invention is by the design of the special fixed structure of this return piece 3, therefore have and initiatively prevent the safe effect of quick-fried pearl (referring to roll piece) from occurring to avoid larger infringement.
Moreover, refer to shown in Fig. 3 to Fig. 7, when this circulating path 100 runs, preferably smooth degree is obtained for making this roll piece 4, therefore this backflow road 31 is divided into four sections by the present invention, these four sections are sequentially connected for the section of climbing A, the first meander sections B, the second meander sections C and joining section D respectively, wherein, this section of climbing A is connected with load path 90, and this joining section D is connected with return port 24; Refer to shown in Fig. 7, this section of climbing part A is located in this sliding channel 11, this section of climbing A has a climb altitude H and the length C that climbs, this climb altitude H is less than this length C that climbs, and this climbs, length C meets this relation: the diameter of the Zhi Jing≤length C≤0.5 times roll piece that climbs of 0.25 times of roll piece; This first meander sections B and the second meander sections C forms single-revolution section, the radius R 3 of the Internal periphery of this meander sections meets this relation: the diameter of the radius R 3≤roll piece of the Zhi Jing≤Internal periphery of 0.5 times of roll piece, and the width U in this backflow road 31 is greater than the diameter of this roll piece 4.
Refer to Fig. 6, this first meander sections B and the second meander sections C sees it by axle direction X, this first meander sections B is made up of the first arc section B1 and the second arc section C1 mutual tangent linking respectively with the bottom profile of the second meander sections C, it has a points of tangency Q, the center of circle B2 of this first arc section B1 and the second arc section C1, C2 is different, and the length of this first arc section B1 meets this relation: the length of the second arc section C1 of the length < 0.8 times of the length < first arc section B1 of 0.5 times of second arc section C1 (note: still continue to climb during the leading portion of roll piece 4 to the first meander sections B, therefore the length of this first arc section B1 must be greater than the length of the second arc section C1, the leading portion of the first meander sections B amplitude of climbing could be allowed comparatively mild, and allow the smooth and easy second meander sections C that moves to of roll piece 4, and obtain the rotary path T of more smooth-going roll piece 4), and the radius R 1 of this first arc section B1 is less than the radius R 2 of this second arc section C1, and the present invention is by above-mentioned path design, the design of special required climb altitude when roll piece 4 departs from this sliding channel 11, its climb altitude is dispersed to the definition of the leading portion of this section of climbing A and the first meander sections B: from the section of climbing and the first meander sections connecting points start to the total length being less than the first meander sections 1/2nd scope, allow roll piece 4 in the climb altitude of the section of climbing A compare design in the past low, relatively also reduce its resistance climbed, and can run smooth and easy when making roll piece 4 depart from sliding channel 11.
Above-described embodiment and graphic and non-limiting product form of the present invention and style, any person of an ordinary skill in the technical field, to its suitable change done or modification, all should be considered as not departing from patent category of the present invention.
Claims (6)
1. a Linear transmission ball spline device, is characterized in that, comprises:
One splined shaft, it extends to strip structure towards a direction, and defining this bearing of trend is axle direction, and the surface of this splined shaft is provided with a plurality of axially extended sliding channels;
One moving body, it comprises body, two return pieces and plural roll piece, this body is provided with a perforation supplying splined shaft sheathed, the inner edge surface of this perforation is provided with the rolling groove of relative sliding channel, sliding channel and rolling groove form a load path, and the two ends of this perforation are respectively equipped with a mounting hole, the diameter of mounting hole is greater than the diameter of this perforation and both are interconnected, body is more provided with the relative rolling groove of quantity and is parallel to the return port of rolling groove setting, the two ends of this return port are connected with this mounting hole, and the cross section of this return port is a circle; Two return pieces are placed in two mounting holes respectively, and return piece is provided with the backflow road of the relative rolling groove of quantity, and backflow road profile is a U-shaped, and its two ends are connected with load path and return port respectively and form a circulating path; Plural number roll piece is arranged at circulating path.
2. Linear transmission ball spline device as claimed in claim 1, is characterized in that: backflow road divides into four sections, and these four sections are sequentially connected for the section of climbing, the first meander sections, the second meander sections and joining section respectively; The width in backflow road is greater than the diameter of roll piece.
3. Linear transmission ball spline device as claimed in claim 2, it is characterized in that: the section of climbing part is located in sliding channel, the section of climbing has a climb altitude and length of climbing, climb altitude is less than length of climbing, and length of climbing meets this relation: the diameter of Zhi Jing≤Chang Du≤0.5 times roll piece that climbs of 0.25 times of roll piece.
4. Linear transmission ball spline device as claimed in claim 2, it is characterized in that: the first meander sections and the second meander sections form single-revolution section, the radius of the Internal periphery of this meander sections meets this relation: the diameter of the Ban Jing≤roll piece of the Zhi Jing≤Internal periphery of 0.5 times of roll piece.
5. Linear transmission ball spline device as claimed in claim 2, it is characterized in that: the first meander sections and the second meander sections see it by axle direction, this first meander sections is made up of the first arc section and the second arc section mutual tangent linking respectively with the bottom profile of the second meander sections, and the center of circle of the first arc section and the second arc section is different; And the length of this first arc section meets this relation: the length of second arc section of the length < 0.8 times of length < first arc section of 0.5 times of second arc section; And first the radius of arc section be less than the radius of the second arc section.
6. Linear transmission ball spline device as claimed in claim 1, it is characterized in that: the inner edge surface depression of mounting hole is provided with the fixed groove of an annular, when this return piece arranges mounting hole, the end face of return piece and the tangent setting of inner side cell wall of fixed groove, one fixed block is arranged at this fixed groove, and this fixed block contacts at the end face of return piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310497988.2A CN104565030B (en) | 2013-10-22 | 2013-10-22 | Linear-transmission ball spline device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310497988.2A CN104565030B (en) | 2013-10-22 | 2013-10-22 | Linear-transmission ball spline device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104565030A true CN104565030A (en) | 2015-04-29 |
| CN104565030B CN104565030B (en) | 2017-05-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310497988.2A Active CN104565030B (en) | 2013-10-22 | 2013-10-22 | Linear-transmission ball spline device |
Country Status (1)
| Country | Link |
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| CN (1) | CN104565030B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113236665A (en) * | 2021-03-19 | 2021-08-10 | 丽水市杰祥科技有限公司 | Sliding block with oil way distributor and using method thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4634296A (en) * | 1985-05-20 | 1987-01-06 | Nippon Thompson Co., Ltd. | Ball spline bearing |
| US4655611A (en) * | 1984-12-28 | 1987-04-07 | Nippon Thompson Co., Ltd. | Ball spline bearing assembly |
| JPS63140111A (en) * | 1986-12-03 | 1988-06-11 | Nippon Thompson Co Ltd | Ball spline bearing with drive device |
| US5669716A (en) * | 1995-03-14 | 1997-09-23 | Hiwin Technologies Corporation | Linear ball bearing |
| US5893646A (en) * | 1997-02-06 | 1999-04-13 | Nippon Thompson Co., Ltd. | Ball spline |
| EP1199485A1 (en) * | 2000-10-19 | 2002-04-24 | INA Wälzlager Schaeffler oHG | Linear rolling bearing |
| CN101317017A (en) * | 2005-11-01 | 2008-12-03 | Thk株式会社 | Movement guiding device |
| CN201884466U (en) * | 2010-11-26 | 2011-06-29 | 全球传动科技股份有限公司 | Ball spline group and spline shaft thereof |
| CN202811839U (en) * | 2012-02-22 | 2013-03-20 | 威海利奥泰儆自动化设备有限公司 | Flat surface raceway ball bearing spline pair |
-
2013
- 2013-10-22 CN CN201310497988.2A patent/CN104565030B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4655611A (en) * | 1984-12-28 | 1987-04-07 | Nippon Thompson Co., Ltd. | Ball spline bearing assembly |
| US4634296A (en) * | 1985-05-20 | 1987-01-06 | Nippon Thompson Co., Ltd. | Ball spline bearing |
| JPS63140111A (en) * | 1986-12-03 | 1988-06-11 | Nippon Thompson Co Ltd | Ball spline bearing with drive device |
| US4764032A (en) * | 1986-12-03 | 1988-08-16 | Nippon Thompson Co., Ltd. | Ball spline bearing provided with a driving unit |
| US5669716A (en) * | 1995-03-14 | 1997-09-23 | Hiwin Technologies Corporation | Linear ball bearing |
| US5893646A (en) * | 1997-02-06 | 1999-04-13 | Nippon Thompson Co., Ltd. | Ball spline |
| EP1199485A1 (en) * | 2000-10-19 | 2002-04-24 | INA Wälzlager Schaeffler oHG | Linear rolling bearing |
| CN101317017A (en) * | 2005-11-01 | 2008-12-03 | Thk株式会社 | Movement guiding device |
| CN201884466U (en) * | 2010-11-26 | 2011-06-29 | 全球传动科技股份有限公司 | Ball spline group and spline shaft thereof |
| CN202811839U (en) * | 2012-02-22 | 2013-03-20 | 威海利奥泰儆自动化设备有限公司 | Flat surface raceway ball bearing spline pair |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113236665A (en) * | 2021-03-19 | 2021-08-10 | 丽水市杰祥科技有限公司 | Sliding block with oil way distributor and using method thereof |
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| Publication number | Publication date |
|---|---|
| CN104565030B (en) | 2017-05-10 |
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