CN1991206A - Roller screw rod device - Google Patents
Roller screw rod device Download PDFInfo
- Publication number
- CN1991206A CN1991206A CN 200510135677 CN200510135677A CN1991206A CN 1991206 A CN1991206 A CN 1991206A CN 200510135677 CN200510135677 CN 200510135677 CN 200510135677 A CN200510135677 A CN 200510135677A CN 1991206 A CN1991206 A CN 1991206A
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- reflux
- nut
- screw rod
- spiral grooves
- roller
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Abstract
The invention relates to a roller screw device. It makes the reflux pathway be designed into the combination of a line segment and two reflux segments and the needed turn angle in rolling path of roller in cycle be designed in two reflux parts to form two reflux segment dispersedly. The reflux part is formed together by injection or cast and the straight segment is formed by the groove machined on the screw cap directly, and cover board covering on it. By setting the cover board two reflux parts can be fixed so that the machining and assembling of whole reflux pathway is easy. In addition, the straight segment of reflux pathway is set in the screw cap and two reflux segments is connected with two ends of the straight segment and two ends of helical groove so that the pathway with connecting the beginning and the end. By it the path of reflux pathway shortens and the section shape of reflux pathway is ensured so as to improve the regurgitant smooth degree of roller.
Description
Technical field
The present invention is relevant a kind of roller screw rod device, refers to especially a kind ofly can promote the backflow smooth degree, and is easy to make the roller screw rod device of assembling.
Background technique
Press, the structure of ball screw mainly is the corresponding spiral grooves that is provided with on mutually adaptive screw rod and nut, and most balls are set in the spiral grooves of nut, and being provided with current return circuit in the nut can circulate most balls endlessly in nut, and can so just can make ball screw in running, reach the effectiveness of low surface friction drag and high-accuracy location by ball as the driving medium between screw rod and nut.
Need know, be for a form that contacts, according to the hertz contact theorem between ball and the spiral grooves, ball and spiral grooves are and contact, its area of contact is little, and the external force that therefore can bear is also less relatively, so designs and is unfavorable for using occasion at high axial load.So just have the dealer to propose to replace ball (Ball) and the design of formation roller screw, as promptly disclosing the structure of roller screw in the patent cases such as U.S. Pat 3055230, US3192791 and US6481305 with roller (Roller).
Since roller must be in nut endless ground circulating rolling, therefore current return circuit can be set on nut, aforesaid three U. S. Patents all are to set up the current return circuit that a backflow bend pipe is used as roller on nut, shown in first figure, the V-arrangement spiral grooves 11 of corresponding setting on screw rod 1 and the nut 2,21 formed spaces can be arranged at therebetween for most rollers 3 and roll, and the two ends in the spiral grooves 21 of nut 2 are connected with a backflow bend pipe 22, and, make most rollers 3 can be in spiral grooves 11 with a fixed block 23 backflow bend pipe 22 that locks, circulating rolling in 21 runners that constituted with backflow bend pipe 22.
Yet the backflow bend pipe 22 that is connected the spiral grooves two ends itself also must be turned round except circumnutating and turn 90 degrees, and roller is being reentered with correct angle after the backflow among the spiral grooves, and such structure is very difficult in manufacturing.Do processing crooked and that reverse because backflow bend pipe 22 must be the pipe fitting of square with the inner hole section, endoporus can be out of shape and interference when causing roller to roll most probably after processing, even makes roller to roll to pass through.
Moreover; backflow bend pipe 22 for avoid because of the amplitude of crooked (circumnutating) excessive; cause the Internal Hole Deformation amount excessive and influence the rolling of roller; therefore the bend pipe 22 that refluxes can protrude nut one segment distance usually; thus; the length of whole backflow bend pipe 22 just can increase; that is roller 3 quantity that are in the backflow bend pipe 22 can be more; but roller 3 is to be in no load state in backflow bend pipe 22; must be by being positioned at spiral grooves 11; the roller 3 that is in load state in 21 promotes; so be arranged in the reflux cycle rolling that the roller quantity of backflow bend pipe 22 no load states the more more is unfavorable for roller, and can influence the smooth degree of most roller circulating rollings.
In addition, backflow bend pipe 22 protrudes from the outer design of nut, causes the backflow bend pipe by the collision-deformed situation of external force easily, and then produces rolling of interference roller even the problem that roller is stuck.
Certainly, the means that solve backflow bend pipe (outer circulation) design problem are also arranged in being similar to the ball screw field of roller screw, normally take the design of inner loop mode or end cap (plug) endless form, inner loop mode or end cap (plug) endless form has been given up the backflow bend pipe, and the backflow road directly is drilled with among nut, but such means but are difficult on roller screw if will directly migrate.
The reason of difficulty is that ball is the structure of spherical shape, so its cross section of fluid channel is circular, in other words, just can finish backflow runner in the nut as long as nut holed.Yet roller is columned structure, and its cross section of fluid channel is square, and it is quite difficult processing square slotted hole in the middle of nut.So the means of solution backflow bend pipe problem obviously can't directly be used on the roller screw and deal with problems in the middle of ball screw.
To sum up, use of the design of backflow bend pipe, not only be not easy to make, and can influence the smooth degree of roller circulating rolling, therefore in addition improved necessity arranged again for the roller reflux cycle.
Summary of the invention
First purpose of the present invention is to be to solve foregoing problems, and provides a kind of roller backflow stroke that can shorten to promote roller backflow smooth degree, and is easy to the roller screw rod device of manufacturing assembling.
Second purpose of the present invention is to be, be equipped with the nail (Scoop) in the spiral grooves that stretches into screw rod on each part that refluxes, and nail is the tangent direction that is parallel to the spiral grooves of screw rod, and each roller successfully can be guided backflow, and then reaches the effect of promoting roller backflow smooth degree.
For reaching aforementioned purpose, the present invention mainly is that the current return circuit with roller is arranged in the nut, and this current return circuit is to be made of a straightway and two reflux sections.Wherein this straightway is to extend axially in this nut, and this two reflux section is to be formed at respectively in the backflow part, and the part that respectively refluxes is the position that is individually fixed in the spiral grooves two ends of nut, make each reflux section be connected straightway two ends and spiral grooves two ends respectively, and constitute the path of end-to-end, and the cross section of this straightway and two reflux sections all be rectangular for roller in circulating rolling wherein.
Because the present invention is the angle with required turnover in the roller circulating rolling path, disperse to design in two backflow parts to form reflux section, and the backflow part can adopt worker's methods such as ejaculation or casting one-body molded, and the straightway of this current return circuit can directly be processed to form on nut, and fix two backflow parts by cover plate is sealed, make whole current return circuit be easy to make and assembling.
Moreover the length of return flow path can be effectively shortened in the design of aforesaid current return circuit, the roller quantity that is under the no load state is reduced, and can promote the smooth degree that roller refluxes.
In addition, each part that refluxes protrudes out a nail that extends to the spiral grooves of this screw rod in the reflux section of current return circuit and spiral grooves adjoiner, and this nail is the tangent direction that is parallel to the spiral grooves of screw rod, and can each roller guiding be entered in the reflux section of current return circuit by nail, and can promote the smooth degree that roller refluxes.
A kind of roller screw rod device, it comprises: a screw rod, its outer edge surface are concaved with the general V-shaped spiral grooves in a cross section; One nut, it is to cooperatively interact with this screw rod and can be arranged among this nut for screw rod, this nut inner edge surface is concaved with the general V-shaped spiral grooves in a cross section relatively to spiral grooves that should screw rod, and be provided with a current return circuit in this nut and be connected the two ends of spiral grooves to constitute the runner of end-to-end, and most rollers are set in runner, make most rollers can be in nut endless ground circulating rolling be used as driving medium between screw rod and the nut; This current return circuit is to be made of a straightway and two reflux sections, and each reflux section is to be connected straightway two ends and spiral grooves two ends respectively, and constitutes the runner of aforementioned end-to-end; This straightway is to extend axially in this nut, and the cross section of this straightway be rectangular for roller in wherein rolling; This two reflux section is to be formed at respectively in the backflow part, and each part that refluxes is the position that is individually fixed in the spiral grooves two ends of nut, and each reflux section is connected with the spiral grooves two ends respectively, and the cross section of each reflux section also rectangular for roller in wherein rolling; By this, make most rollers can be in the runner of the end-to-end that current return circuit and spiral grooves are constituted endless ground circulating rolling.
The outer edge surface of this nut is concaved with an axially extended rectangle groove, and to being provided with a cover plate by rectangle groove, makes the straightway that forms aforementioned current return circuit between this rectangle groove and this cover plate.
This nut corresponding to the position at spiral grooves two ends respectively ecto-entad offer a containing groove, each containing groove is to communicate with the straightway of current return circuit, and each containing groove does not run through nut fully, make the adjoiner of each containing groove and nut inner edge surface be formed with a stopper, and the cross section of each containing groove is to cooperate with each backflow part, but the part ecto-entad that respectively refluxes is embedded in each containing groove respectively, and respectively reflux part and locate by each stopper block, can be connected straightway two ends and spiral grooves two ends respectively in order to do respectively the reflux reflux section of part of order.
Each part that refluxes protrudes out a nail that extends to the spiral grooves of this screw rod in the reflux section of current return circuit and spiral grooves adjoiner, and the tangent plane of this nail is the tangent direction that drops on the spiral grooves of this screw rod, and each roller guiding can be entered reflux section.
This rectangle groove and each backflow part be the position on same straight line, make this cover plate can cross over the part that respectively refluxes, and each backflow part fixed by this cover plate.
Each part that refluxes is placed in wherein for this cover plate being respectively equipped with a recess by cover plate.
Beneficial effect of the present invention is:
1. a kind of roller backflow stroke that can shorten provided by the invention is promoted roller backflow smooth degree, and is easy to the roller screw rod device of manufacturing assembling;
2. a kind of roller backflow stroke that can shorten provided by the invention is promoted roller backflow smooth degree, be equipped with the nail (Scoop) in the spiral grooves that stretches into screw rod on each part that refluxes, and nail is the tangent direction that is parallel to the spiral grooves of screw rod, and each roller successfully can be guided backflow, and then reach the effect of promoting roller backflow smooth degree.
In order further to understand feature of the present invention and technology contents, see also following relevant embodiments of the present invention explanation and graphic, however this mode of execution and graphic only for explanation and with reference to usefulness, but not in order to the present invention is done any restriction.
Description of drawings
Fig. 1 is the roller screw structural representation with backflow bend pipe of prior art
Fig. 2 is a sectional structure schematic representation of the present invention
Fig. 3 is the three-dimensional exploded view of nut of the present invention
Fig. 4 is the structural representation that backflow part of the present invention cooperates with nut
The primary clustering symbol description
Prior art
Screw rod 1 nut 2
Spiral grooves 11,21 rollers 3
Backflow bend pipe 22 fixed blocks 23
The present invention
Screw rod 5 spiral grooves 51
Roller 7 current return circuits 8
Containing groove 84 stoppers 841
Recess 831 nails 832
Bolt 85 straightway L
Reflux section C
Embodiment
See also Fig. 2-Fig. 4, it is the first selected embodiment of the present invention.The roller screw rod device of present embodiment is made of a screw rod 5, a nut 6 and most roller 7, and the most rollers 7 in the present embodiment are that mode with cross arrangement is provided with.
The outer edge surface of this screw rod 5 is concaved with the general V-shaped spiral grooves 51 in cross section, and this nut 6 is to cooperatively interact with this screw rod 5 and can be arranged in wherein for screw rod 5, and the inner edge surface of this nut 6 is concaved with the general V-shaped spiral grooves 61 in cross section relatively to spiral grooves 51 that should screw rod 5, be provided with a current return circuit 8 in this nut 6 and be connected the two ends of spiral grooves 61 to constitute the runner of end-to-end, and most rollers 7 are set in runner, make most rollers 7 can be in nut 6 endless ground circulating rolling be used as driving medium between screw rod 5 and the nut 6.
This current return circuit 8 is made up of a straightway L and two reflux section C, and each reflux section C is connected straightway L two ends and spiral grooves 61 two ends respectively, and constitutes the runner of aforementioned end-to-end.
This straightway L extends axially in this nut 6, it in the present embodiment the axially extended rectangle groove 81 that processes a depression in the outer edge surface of this nut 6, and to being provided with a cover plate 82 by rectangle groove 81, these cover plate 82 two ends have a protuberance 821 respectively, when making this cover plate 82 be locked on this rectangle groove 81 with bolt 85, can between this rectangle groove 81 and this cover plate 82, form the rectangular current return circuit straightway L in cross section, for roller 7 in wherein rolling.
This two reflux section C is formed at respectively in the backflow part 83, and in present embodiment, the reflux section C in each part 83 that refluxes all is the bending of about 90 degree, and miter angle is all reversed in the rectangular cross section of each reflux section C.
Each part 83 that refluxes is the positions that are individually fixed in spiral grooves 61 two ends of nut 6, in present embodiment, nut 6 be aforesaid position respectively ecto-entad offer a containing groove 84, each containing groove 84 is to communicate with the straightway L (rectangle groove 81) of current return circuit 8, and each containing groove 84 does not run through nut 6 fully, make each containing groove 84 and the adjoiner of nut 6 inner edge surfaces be formed with a stopper 841, and the cross section of each containing groove 84 is to cooperate with each backflow part 83, but part 83 ecto-entads that respectively reflux are embedded in each containing groove 84 respectively, and respectively reflux part 83 and locate by each stopper 841 block, respectively the reflux reflux section C of part 83 can be connected respectively in straightway L two ends.
And this rectangle groove 81 is that the position is on same straight line with each backflow part 83, therefore this cover plate 82 can be crossed over the part 83 that respectively refluxes, and 83 pairs of the parts that respectively reflux should be respectively equipped with a recess 831 by cover plate 82, are placed in wherein for this cover plate 82, and can be by this cover plate 82 that each backflow part 83 is fixing.
Moreover, each part 83 that refluxes protrudes out a nail (Scoop) 832 that extends to the spiral grooves 51 of this screw rod 5 in reflux section C and spiral grooves 61 adjoiners, and the tangent plane of this nail 832 is the tangent directions that drop on the spiral grooves 51 of this screw rod 5, and can each roller 7 guiding be entered among the reflux section C by nail 832.By this, make most rollers 7 can be in the runner of current return circuit 8 and spiral grooves 61,51 end-to-ends that constituted endless ground circulating rolling.
The means that the present invention solves backflow bend pipe problem in the prior art are still current return circuit 8 are arranged in the middle of the nut, but the cross section of the path that refluxes for roller must be a rectangle, can't process in the mode of boring.Therefore, the outer edge surface that the present invention satisfies at this nut 6 processes an axially extended rectangle groove 81 with processing modes such as millings, but this rectangle groove 81 is open outwardly, so path that can't directly reflux as roller 7, be again to should a cover plate 82 being set rectangle groove 81 with the present invention, and these cover plate 82 two ends have protuberance 821 respectively, when making this cover plate 82 be locked on this rectangle groove 81, can between this rectangle groove 81 and this cover plate 82, form the rectangular path in cross section, to be provided as the straightway L of current return circuit 8, allow the roller 7 can be in wherein rolling.Such design is very to be convenient to make.
Then be connected by reflux section C between the straightway L two ends of current return circuit 8 and the spiral grooves 61, reflux section C is formed among the backflow part 83.Because roller is to be no load state in reflux course, the part 83 that therefore refluxes can adopt worker's methods such as ejection formation or casting one-body molded, reaches easily so the reflux section C that the cross section is square is set in backflow part 83.Thus just can be nut 6 inner formation for the current return circuits 8 of roller 7 circulating rollings by two reflux section C and straightway L.
And in order to make assembling more convenient, each containing groove 84 of the present invention is not run through nut 6 fully, makes each containing groove 84 and the adjoiner of nut 6 inner edge surfaces be formed with a stopper 841, and can produce the effect of location that stops to the backflow part 83 that is embedded in the containing groove 84; Moreover, this rectangle groove 81 and each backflow part 83 be the position on same straight line, so this cover plate 82 can cross over the part 83 that respectively refluxes, and just two backflow parts 83 also can be fixed in the lump when making locking cover plate 82, allow assemble more convenient.
Because current return circuit 8 of the present invention is arranged on nut 6 inside, therefore the stroke of whole current return circuit 8 can shorten many with respect to the backflow bend pipe of prior art, therefore make that also the roller quantity that is in no load state reduces, and can promote the smooth degree that roller 7 refluxes.
In addition, each part 83 that refluxes protrudes out a nail 832 that extends in the spiral grooves 51 of this screw rod 5 in reflux section C and spiral grooves 61 adjoiners, and this nail 832 is the tangent directions that are parallel to spiral grooves 51, therefore nail 832 can be guided the roller 7 in rolling among the reflux section C that enters current return circuit swimmingly, and can promote the smooth degree that roller refluxes.
In sum, roller screw rod device of the present invention can reach really and be easy to the effect of making, assembling, and can effectively promote the smooth degree that roller refluxes.
The above embodiment's announcement is in order to explanation the present invention, is not in order to restriction the present invention, so the displacement of the variation of numerical value and equivalent elements such as must be subordinate to category of the present invention.
Claims (6)
1. roller screw rod device is characterized in that it comprises:
One screw rod, its outer edge surface are concaved with the general V-shaped spiral grooves in a cross section;
One nut, it is to cooperatively interact with this screw rod and can be arranged among this nut for screw rod, this nut inner edge surface is concaved with the general V-shaped spiral grooves in a cross section relatively to spiral grooves that should screw rod, and be provided with a current return circuit in this nut and be connected the two ends of spiral grooves to constitute the runner of end-to-end, and most rollers are set in runner, make most rollers can be in nut endless ground circulating rolling be used as driving medium between screw rod and the nut;
This current return circuit is to be made of a straightway and two reflux sections, and each reflux section is to be connected straightway two ends and spiral grooves two ends respectively, and constitutes the runner of aforementioned end-to-end;
This straightway is to extend axially in this nut, and the cross section of this straightway be rectangular for roller in wherein rolling;
This two reflux section is to be formed at respectively in the backflow part, and each part that refluxes is the position that is individually fixed in the spiral grooves two ends of nut, and each reflux section is connected with the spiral grooves two ends respectively, and the cross section of each reflux section also rectangular for roller in wherein rolling;
By this, make most rollers can be in the runner of the end-to-end that current return circuit and spiral grooves are constituted endless ground circulating rolling.
2. roller screw rod device according to claim 1 is characterized in that: the outer edge surface of this nut is concaved with an axially extended rectangle groove, and to being provided with a cover plate by rectangle groove, makes the straightway that forms aforementioned current return circuit between this rectangle groove and this cover plate.
3. roller screw rod device according to claim 1, it is characterized in that: this nut corresponding to the position at spiral grooves two ends respectively ecto-entad offer a containing groove, each containing groove is to communicate with the straightway of current return circuit, and each containing groove does not run through nut fully, make the adjoiner of each containing groove and nut inner edge surface be formed with a stopper, and the cross section of each containing groove is to cooperate with each backflow part, but the part ecto-entad that respectively refluxes is embedded in each containing groove respectively, and respectively reflux part and locate by each stopper block, can be connected straightway two ends and spiral grooves two ends respectively in order to do respectively the reflux reflux section of part of order.
4. roller screw rod device according to claim 1, it is characterized in that: each part that refluxes protrudes out a nail that extends to the spiral grooves of this screw rod in the reflux section of current return circuit and spiral grooves adjoiner, and the tangent plane of this nail is the tangent direction that drops on the spiral grooves of this screw rod, and each roller guiding can be entered reflux section.
5. roller screw rod device according to claim 2 is characterized in that: this rectangle groove and each backflow part be the position on same straight line, make this cover plate can cross over the part that respectively refluxes, and each backflow part fixed by this cover plate.
6. roller screw rod device according to claim 5 is characterized in that: each part that refluxes is placed in wherein for this cover plate being respectively equipped with a recess by cover plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510135677 CN1991206A (en) | 2005-12-31 | 2005-12-31 | Roller screw rod device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510135677 CN1991206A (en) | 2005-12-31 | 2005-12-31 | Roller screw rod device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1991206A true CN1991206A (en) | 2007-07-04 |
Family
ID=38213649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510135677 Pending CN1991206A (en) | 2005-12-31 | 2005-12-31 | Roller screw rod device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1991206A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101354077B (en) * | 2007-07-23 | 2010-04-21 | 上银科技股份有限公司 | Drive element with lubrication induction die set |
| CN102037256A (en) * | 2008-04-09 | 2011-04-27 | 埃瑟泰克电子有限公司 | A linear actuator |
-
2005
- 2005-12-31 CN CN 200510135677 patent/CN1991206A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101354077B (en) * | 2007-07-23 | 2010-04-21 | 上银科技股份有限公司 | Drive element with lubrication induction die set |
| CN102037256A (en) * | 2008-04-09 | 2011-04-27 | 埃瑟泰克电子有限公司 | A linear actuator |
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