CN103939551A - Ball screw pair with nut main driving - Google Patents
Ball screw pair with nut main driving Download PDFInfo
- Publication number
- CN103939551A CN103939551A CN201410097935.6A CN201410097935A CN103939551A CN 103939551 A CN103939551 A CN 103939551A CN 201410097935 A CN201410097935 A CN 201410097935A CN 103939551 A CN103939551 A CN 103939551A
- Authority
- CN
- China
- Prior art keywords
- nut
- ball screw
- screw pair
- leading screw
- nut seat
- 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
Links
Classifications
-
- 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
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
- F16H25/2204—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
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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
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
-
- 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
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H2025/2062—Arrangements for driving the actuator
- F16H2025/2081—Parallel arrangement of drive motor to screw axis
Abstract
The invention discloses a ball screw pair with nut main driving. The ball screw pair comprises a lead screw, a nut, a nut base, a bearing mechanism and a driving motor. The nut is sleeved with the nut base in an embedded mode through the bearing mechanism, so that nut freely rotates in the circumferential direction relative to the nut base, the nut is connected with the driving motor through a driving device, and the nut base and a working table are connected together in an overall mode. The rotational inertia is small, the rigidity of the ball screw pair is high, the limit rotation speed of a system is greatly increased, and low-speed operation and high-speed driving are easy to achieve. Meanwhile, working precision is stable relatively, motor power is low, the overall structure is simple, and installing and commissioning are convenient.
Description
Technical field
The invention belongs to mechanical equipment technical field, relate to the main driving ball screw pair of a kind of nut.
Background technique
Along with the high speed development of the industries such as China's aviation, railway, boats and ships, electric power, the equipment of these industries is constantly updated, large-scale, heavy parts is on the increase, with it supporting part working machine tool also towards large-scale, heavy, at a high speed, efficient future development, this just requires the main driving mechanism ball screw pair nominal diameter of lathe larger, nominal lead is larger, and leading screw length is longer, support distances increasing etc.Traditional ball screw pair is using leading screw as main driving rotating machinery, the increasing of leading screw length and support distances add senior general and cause leading screw amount of deflection to increase, in mechanism system, can produce larger rotary inertia, greatly restrict the raising of system limits rotating speed, increased the power of drive motor simultaneously.Secondly, ball screw pair is to adjust gap assembling to regulate axial pretightening to reach certain rigidity by nut, then regulates rigidity by bearing preload is installed on leading screw axle journal.And in the use occasion of many high rigidity requirements, the ball screw pair that rotates to be main driving mode with leading screw improves rigidity and has had very large narrow limitation by strengthening axial prestretching force, cannot meet user's usage requirement.With respect to the ball screw pair using leading screw rotation as main driving mode, have an enormous advantage as rotation main driving mechanism tool with nut.Therefore, research and development are the inexorable trend of Rolling Components industry using nut rotation as the ball screw pair of main driving.
Summary of the invention
Main purpose of the present invention is to provide the main driving ball screw pair of a kind of nut, thereby solve, the existing ball screw pair rotary inertia using leading screw rotation as main driving mode is large, rotating speed cannot improve and the inadequate defect that causes bigger error of leading screw rigidity.
In order to realize goal of the invention, the technical solution adopted in the present invention is, the main driving ball screw pair of a kind of nut, include leading screw, nut, nut seat, gear mechanism and drive motor, described leading screw two ends are fixed on bed piece, nut is nested on leading screw, be provided with the spirality raceway of mutual correspondence along leading screw outer wall and nut inner wall, on raceway, be provided with corresponding reflux, in raceway and reflux, be provided with can circulating rolling ball, thereby described nut seat makes nut can along the circumferential direction rotate freely with respect to nut seat by nested being arranged on nut of gear mechanism, the front end of nut and nut seat is respectively arranged with corresponding flange arrangement, the flange arrangement of nut front end is connected with the rotating shaft of drive motor by transmission device, nut seat entirety links together with worktable.
Feature of the present invention is also, gear mechanism adopts two groups of Biserial cylindrical roller bearings and end face cylindrical roller thrust bearing to coordinate and installs, wherein one group of gear mechanism is arranged between nut seat and the flange arrangement of nut front end, and another group gear mechanism is arranged between nut seat and the tail end of nut.
Leading screw and nut two ends junction point are provided with dust ring, and dust ring prevents from by screw fastening.
The flange arrangement place on nut seat top is provided with the lubricant oil interface perpendicular to axis, in nut seat chamber, be provided with a main oil gallery, on main oil gallery, be provided with three branched bottoms, wherein two branched bottoms lead to gear mechanism, and another branched bottom leads to nut inside.
Transmission device be pulley gear, sprocket transmission device or gear drive one of them.
The invention has the beneficial effects as follows:
1) rotary inertia of the present invention is little, has greatly improved the limit speed of system, is easy to realize low-speed running high-speed drive, can make selected power of motor less simultaneously;
2) leading screw of the present invention does not rotate, and on its axle journal, without bearing is installed, can apply larger axial prestretching force to leading screw, makes the rigidity of a whole set of ball screw pair be able to great raising;
3) the present invention can install multiple rotating nut combining units on a rhizoid thick stick, and multiple worktable are by each self-driven at the same time or separately, its motion mutual noninterference;
4) leading screw of the present invention does not rotate, and its supplemental support place, middle part, without circumferential friction, does not exist local pyrexia problem, and therefore its operating accuracy is relatively stable;
5) leading screw of the present invention does not rotate, and cooling tube joint is more easily arranged, installed, and the mode that reduces temperature rise is also more;
6) rotating nut combining unit of the present invention integrates multiple functional parts, and simplified design, is convenient to installation and adjustment.
Brief description of the drawings
Fig. 1 is overall structure schematic diagram of the present invention;
Fig. 2 is nut seat structural representation of the present invention;
Fig. 3 is nut structure schematic diagram of the present invention;
Fig. 4 is leading screw of the present invention, nut and nut seat assembly structure schematic diagram.
In figure, 1. leading screw, 2. nut, 3. nut seat, 4. drive motor, 5. raceway, 6. reflux, 7. ball, 8. worktable, 9. Biserial cylindrical roller bearing, 10. end face cylindrical roller thrust bearing, 11. lubricant oil interfaces, 12. main oil galleries, 13. branched bottoms, 14. through holes, 15. belt pulleys, 16. transmission belts, 17. dust rings, 18. screws, 19. circlip for holes, 20. spacers, 21. packing rings, 22. locking nuts, 23. hexagonal cylindrical head screws.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
The invention provides the main driving ball screw pair of a kind of nut, as shown in Figure 1, include leading screw 1, nut 2, nut seat 3, gear mechanism and drive motor 4, described leading screw 1 two ends are fixed on bed piece, nut 2 is nested on leading screw 1, be provided with the spirality raceway 5 of mutual correspondence along leading screw 1 outer wall and nut 2 inwalls, on raceway 5, be provided with corresponding reflux 6, in raceway 5 and reflux 6, be provided with can circulating rolling ball 7, thereby described nut seat 3 makes nut 2 can along the circumferential direction rotate freely with respect to nut seat 3 by nested being arranged on nut 2 of gear mechanism, the front end of nut 2 and nut seat 3 is respectively arranged with corresponding flange arrangement, the flange arrangement of nut 2 front ends is connected with the rotating shaft of drive motor 4 by transmission device, nut seat 3 entirety link together with worktable 8.
When concrete enforcement, according to the demand of installing space, reflux 6 can adopt different time pearl endless form and preloading form, preferably adopts the reflux 6 of inner loop mode for good.Gear mechanism adopts two groups of Biserial cylindrical roller bearings 9 and end face cylindrical roller thrust bearing 10 to coordinate and installs, wherein one group of gear mechanism is arranged between nut seat 3 and the flange arrangement of nut 2 front ends, and another group gear mechanism is arranged between nut seat 3 and the tail end of nut 2.Nut 2 is in rotation and in moving process, will bear axial force and radial force vertically, the main bearing radial force of Biserial cylindrical roller bearing 9, and end face cylindrical roller thrust bearing 10 mainly bears axial force.Because of designing requirement compact structure, simple and easy, therefore lubricated aspect changes traditional Lubricant feeding mode, as shown in Figure 2, the present invention does not directly design oilhole on nut 2 matrixes, but at a standard lubricant oil interface 11 perpendicular to axis of the flange arrangement place on nut seat 3 tops design, concentrate lubricant oil is provided by gas station, in nut seat 3 chambeies, be provided with one along axial main oil gallery 12, on main oil gallery, 12 are provided with three branched bottoms 13, wherein two branched bottoms 13 lead to gear mechanism, another branched bottom leads to nut 2, as shown in Figure 3, on nut 2, be designed with circular groove along its circumferencial direction, several uniform through holes 14 of milling on circular groove, lubricant oil is flow in nut 2 inner chambers, for providing good lubrication between leading screw 1 and nut 2.Transmission device between nut 2 and drive motor 4 can select pulley gear, sprocket transmission device or gear drive one of them, the present invention preferably adopts pulley gear, correspondingly, belt pulley is installed respectively on the flange arrangement of nut front end and on drive motor 4 has cover on 15, two belt pulleys 15 of belt pulley to have transmission belt 16.
In installation process, in the raceway 5 of leading screw 1 and nut 2, fill ball 7 and pack reflux 6 into, as shown in Figure 4, packing dust ring 17 into and adopt that screw 18 is fastening to be prevented from the junction point at leading screw 1 and nut 2 two ends subsequently.Divide order to pack end face cylindrical roller thrust bearing 10 at nut seat 3 flange arrangement one end inner chambers, pack subsequently Biserial cylindrical roller bearing 9 into, reinstall circlip for hole 19, can limit bearing according to the relevance of the size of processing and axially scurry out and come off.In like manner, divide order to pack end face cylindrical roller thrust bearing 10, Biserial cylindrical roller bearing 9 and circlip for hole 19 at nut seat 3 tail end inner chambers.On the cylindrical of nut 2 flange arrangement one end, pack packing ring 21 into, then be inserted in the assemblying body of nut seat 3 and gear mechanism, the flange arrangement of nut seat 3 is towards the direction of nut 2 flange arrangements, between rear-end Biserial cylindrical roller bearing 9 and nut 2, pack spacer 20 into subsequently, pack packing ring 21 in spacer 20 outsides, finally screw in and regulate the prestretching force of gear mechanism to reach good rigidity by two groups of locking nuts 22, on the fit system of gear mechanism and nut 2 and nut seat 3, according to the manufacturability of assembling, between Biserial cylindrical roller bearing 9 inner rings and spacer 20, select transition fit, between spacer 20 and nut 2, carry out Spielpassung, must strict control gap amount.Biserial cylindrical roller bearing 9 outer rings and nut seat 3 are realized Spielpassung, strict control gap amount simultaneously, and the selection of above-mentioned fit system, has greatly reduced difficulty of processing in the rational while that has ensured technique.Afterwards two belt pulleys 15 are contained in respectively in the flange arrangement end face of nut 2 and the rotating shaft of drive motor 4, belt pulley 15 on nut 2 flange arrangements adopts hexagon socket cap head screw 23 fastening, puts transmission belt 16 and complete installment work on two belt pulleys 15.
In working procedure, drive motor 4 rotates around leading screw 1 by actuator drives nut 2, under the effect of spirality raceway 5 and ball 7, nut 2 can move vertically, moving axially by gear mechanism of nut 2 drives nut seat 3 motion vertically together, worktable 8, together with nut seat 3 integrated connections, thereby is followed nut seat 3 and is realized and moving axially together.The present invention can be by extending leading screw 1 and the textural associations of organizing nuts 2 and nut seat 3 being installed more on leading screw 1 and being realized multiple worktable 8 by each self-driven at the same time or separately, its motion mutual noninterference.
More than show and described basic principle of the present invention, major character and advantage of the present invention; above-mentioned mode of execution and specification are principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in claimed scope of the present invention.The protection domain that the present invention requires is defined by claims and equivalent thereof.
Claims (5)
1. the main driving ball screw pair of nut, it is characterized in that, include leading screw (1), nut (2), nut seat (3), gear mechanism and drive motor (4), described leading screw (1) two ends are fixed on bed piece, nut (2) is nested on leading screw (1), be provided with the spirality raceway (5) of mutual correspondence along leading screw (1) outer wall and nut (2) inwall, on raceway (5), be provided with corresponding reflux (6), in raceway (5) and reflux (6), be provided with can circulating rolling ball (7), described nut seat (3) by gear mechanism nested be arranged on nut (2) thus upper nut (2) can along the circumferential direction be rotated freely with respect to nut seat (3), the front end of nut (2) and nut seat (3) is respectively arranged with corresponding flange arrangement, the flange arrangement of nut (2) front end is connected with the rotating shaft of drive motor (4) by transmission device, nut seat (3) entirety links together with worktable (8).
2. the main driving ball screw pair of a kind of nut as claimed in claim 1, it is characterized in that, described gear mechanism adopts two groups of Biserial cylindrical roller bearings (9) and end face cylindrical roller thrust bearing (10) to coordinate and installs, wherein one group of gear mechanism is arranged between nut seat (3) and the flange arrangement of nut (2) front end, and another group gear mechanism is arranged between nut seat (3) and the tail end of nut (2).
3. the main driving ball screw pair of a kind of nut as claimed in claim 1, it is characterized in that, described leading screw (1) is provided with dust ring (17) with nut (2) two ends junction point, and dust ring (17) prevents from by screw (18) is fastening.
4. the main driving ball screw pair of a kind of nut as claimed in claim 1, it is characterized in that, the flange arrangement place on described nut seat (3) top is provided with the lubricant oil interface (11) perpendicular to axis, in nut seat chamber, be provided with a main oil gallery (12), on main oil gallery, (12) are provided with three branched bottoms (13), wherein two branched bottoms (13) lead to gear mechanism, and another branched bottom leads to nut (2) inside.
5. the main driving ball screw pair of a kind of nut as claimed in claim 1, is characterized in that, described transmission device be pulley gear, sprocket transmission device or gear drive one of them.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410097935.6A CN103939551A (en) | 2014-03-18 | 2014-03-18 | Ball screw pair with nut main driving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410097935.6A CN103939551A (en) | 2014-03-18 | 2014-03-18 | Ball screw pair with nut main driving |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103939551A true CN103939551A (en) | 2014-07-23 |
Family
ID=51187364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410097935.6A Pending CN103939551A (en) | 2014-03-18 | 2014-03-18 | Ball screw pair with nut main driving |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103939551A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106763697A (en) * | 2017-01-06 | 2017-05-31 | 柳州长虹数控机床有限责任公司 | The automatic lubricating system of numerical-controlled lathe ball screw |
| CN106979295A (en) * | 2017-05-15 | 2017-07-25 | 江苏启尖丝杠制造有限公司 | Force booster type ball screw assembly, positions pusher |
| CN107140184A (en) * | 2017-05-18 | 2017-09-08 | 北京科技大学 | A kind of electromechanical wing flap actuator based on antarafacial angular contact roller bearing |
| CN108463420A (en) * | 2016-01-11 | 2018-08-28 | 现代重工集团股份有限公司 | Board carrying robot |
| CN108561521A (en) * | 2018-07-18 | 2018-09-21 | 苏州德扬数控机械有限公司 | The lubrication system of lead screw device |
| CN109154370A (en) * | 2016-06-06 | 2019-01-04 | 索尤若驱动有限及两合公司 | Linear actuator with the nut and screw rod that are rotatably supported in support cap |
| CN109262339A (en) * | 2018-12-10 | 2019-01-25 | 吴行飞 | A kind of rolling ball screw pair screw nut radial floating compressing structure |
| CN109322978A (en) * | 2018-09-18 | 2019-02-12 | 陕西航天时代导航设备有限公司 | The automatic running in machine of ball-screw |
| CN111247904A (en) * | 2020-03-26 | 2020-06-09 | 南京绿源达农业设备有限公司 | Use convenient earth boring machine of planting |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH11257453A (en) * | 1998-03-12 | 1999-09-21 | Kawada Kogyo Kk | Motor-driven linear actuator |
| CN201021709Y (en) * | 2006-11-29 | 2008-02-13 | 李敬宇 | Ball bearing bolt device and rolling spiral drive device |
| US20080092679A1 (en) * | 2006-10-10 | 2008-04-24 | Ntn Corporation | Electrically Driven Liner Actuator |
| CN101648346A (en) * | 2009-06-24 | 2010-02-17 | 江苏瑞安特机械集团有限公司 | Nut rotating type ball screw pair |
| CN201448410U (en) * | 2009-05-25 | 2010-05-05 | 南京数控机床有限公司 | Screw driving device |
| CN202392064U (en) * | 2011-11-25 | 2012-08-22 | 昇章机械有限公司 | Circulator |
| CN103542055A (en) * | 2013-10-24 | 2014-01-29 | 南京工艺装备制造有限公司 | Swivel nut combination unit |
| CN203756897U (en) * | 2014-03-18 | 2014-08-06 | 陕西汉江机床有限公司 | Nut main-driving ball screw pair |
-
2014
- 2014-03-18 CN CN201410097935.6A patent/CN103939551A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11257453A (en) * | 1998-03-12 | 1999-09-21 | Kawada Kogyo Kk | Motor-driven linear actuator |
| US20080092679A1 (en) * | 2006-10-10 | 2008-04-24 | Ntn Corporation | Electrically Driven Liner Actuator |
| CN201021709Y (en) * | 2006-11-29 | 2008-02-13 | 李敬宇 | Ball bearing bolt device and rolling spiral drive device |
| CN201448410U (en) * | 2009-05-25 | 2010-05-05 | 南京数控机床有限公司 | Screw driving device |
| CN101648346A (en) * | 2009-06-24 | 2010-02-17 | 江苏瑞安特机械集团有限公司 | Nut rotating type ball screw pair |
| CN202392064U (en) * | 2011-11-25 | 2012-08-22 | 昇章机械有限公司 | Circulator |
| CN103542055A (en) * | 2013-10-24 | 2014-01-29 | 南京工艺装备制造有限公司 | Swivel nut combination unit |
| CN203756897U (en) * | 2014-03-18 | 2014-08-06 | 陕西汉江机床有限公司 | Nut main-driving ball screw pair |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108463420A (en) * | 2016-01-11 | 2018-08-28 | 现代重工集团股份有限公司 | Board carrying robot |
| CN109154370A (en) * | 2016-06-06 | 2019-01-04 | 索尤若驱动有限及两合公司 | Linear actuator with the nut and screw rod that are rotatably supported in support cap |
| CN109154370B (en) * | 2016-06-06 | 2022-04-08 | 索尤若驱动有限及两合公司 | Linear drive with a nut and a spindle rotatably mounted in a bearing cover |
| CN106763697A (en) * | 2017-01-06 | 2017-05-31 | 柳州长虹数控机床有限责任公司 | The automatic lubricating system of numerical-controlled lathe ball screw |
| CN106979295A (en) * | 2017-05-15 | 2017-07-25 | 江苏启尖丝杠制造有限公司 | Force booster type ball screw assembly, positions pusher |
| CN107140184A (en) * | 2017-05-18 | 2017-09-08 | 北京科技大学 | A kind of electromechanical wing flap actuator based on antarafacial angular contact roller bearing |
| CN108561521A (en) * | 2018-07-18 | 2018-09-21 | 苏州德扬数控机械有限公司 | The lubrication system of lead screw device |
| CN108561521B (en) * | 2018-07-18 | 2024-02-13 | 苏州德扬数控机械有限公司 | Lubrication structure of screw rod device |
| CN109322978A (en) * | 2018-09-18 | 2019-02-12 | 陕西航天时代导航设备有限公司 | The automatic running in machine of ball-screw |
| CN109262339A (en) * | 2018-12-10 | 2019-01-25 | 吴行飞 | A kind of rolling ball screw pair screw nut radial floating compressing structure |
| CN109262339B (en) * | 2018-12-10 | 2023-06-23 | 北京博鲁斯潘精密机床有限公司 | Radial floating compression structure of ball screw pair nut |
| CN111247904A (en) * | 2020-03-26 | 2020-06-09 | 南京绿源达农业设备有限公司 | Use convenient earth boring machine of planting |
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Application publication date: 20140723 |