CN201021709Y - Ball bearing bolt device and rolling spiral drive device - Google Patents
Ball bearing bolt device and rolling spiral drive device Download PDFInfo
- Publication number
- CN201021709Y CN201021709Y CNU2006200160571U CN200620016057U CN201021709Y CN 201021709 Y CN201021709 Y CN 201021709Y CN U2006200160571 U CNU2006200160571 U CN U2006200160571U CN 200620016057 U CN200620016057 U CN 200620016057U CN 201021709 Y CN201021709 Y CN 201021709Y
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- Prior art keywords
- ball
- nut
- ball nut
- screw
- bearing
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- Expired - Lifetime
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Abstract
The utility model discloses a ball nut device, and includes a ball nut and a nut seat, the inner hole surface of the ball nut has spiral rollaway nest, the nut seat is arranged on the ball nut through rolling bearing, the inside circumference of the rolling bearing is arranged immovably on the outer neck journal of the ball nut, the outside circumference of the rolling bearing is arranged immovably in the inner hole of the nut seat, one end of the ball nut is connected with the connector of the driving device. The utility model can overcome the vibration of the ball-screw pair caused by screw rod bending, and reduce the noise produced because of the vibration of equipment, so as to improve the working accuracy of the equipment. After the adoption of the utility model, the requirement for the curve degree of the screw rod can be lowered, so as to greatly prolong the service life of the screw rod and the ball-screw pair; since the naked screw rod does not rotate, so as not to cause threatening to the safety in production, and also reduce an unsafe factor of mechanical equipment.
Description
[technical field]
The utility model relates to the rolling screw drive technology, relates in particular to a kind of ball nut device and a kind of rolling screw transmission device that is applied in the ball screw pair.
[background technique]
Fill with steel ball between the spiral rolling track of screw rod and nut, when screw rod or nut rotation, steel ball rolls along spiral rolling track, and the friction between the screw pair is rolling friction, and this spiral is rolling screw or claim ball screw.Ball screw pair is the important execution functional part in the mechanized equipment.The motion state of ball screw pair directly has influence on the kinematic accuracy of whole machinery in mechanical transmission, all will develop the core technology of ball screw pair as a national equipment manufacture both at home and abroad.Because ball screw pair has characteristics such as high efficiency, highi degree of accuracy, is widely used in fields such as machinery, space flight, aviation, nuclear industry.Now, ball screw pair has become the first-selected parts of mechanical transmission and location.Traditional ball screw pair generally is ball screw rotation, thereby the ball nut that drive itself is not rotated is done the linarity motion, has realized that nut drove, as the linear reciprocating motion of operation mechanisms such as the upper slide rest in the lathe, middle carriage.Leading screw is elongated thick stick, under the effect of power and heat, can produce bending deflection, and the leading screw of distortion produces vibration and noise in transmission process, and passes to nut and operation mechanism, has reduced the operating accuracy of transmission and equipment.For equipment that runs up and jumbo,, bigger to the influence of equipment precision because of the bending deflection of the leading screw in the ball screw pair.Because leading screw bending deflection produces the reduction of vibration, noise and kinematic accuracy, ball screw pair is scrapped in advance, influenced the working life of ball screw pair, improved the operation cost of manufacturing enterprise.And the exposed leading screw that rotates also is a threat to safety in production.
[summary of the invention]
The technical problems to be solved in the utility model provides and a kind ofly can overcome leading screw bending deflection and cause ball screw secondary undulation and kinematic accuracy to reduce, keep the kinematic accuracy of ball screw pair in the long period, improve the ball nut device in the working life of ball screw pair.
Another technical problem that will solve of the utility model provides a kind of rolling screw transmission device, and this device can overcome ball screw bending deflection, improves the working life of ball screw pair, and the long period is kept the kinematic accuracy of transmission device.
In order to solve first technical problem, the technical solution adopted in the utility model is that a kind of ball nut device comprises ball nut and nut seat, the bore area of described ball nut has spiral rolling track, and described nut seat is crossed rolling bearing and is installed on the ball nut; The inner ring of rolling bearing is packed on the outer axle journal of ball nut, and the outer ring of rolling bearing is packed in the endoporus of nut seat; One end of described ball nut has the joint that connects drive unit.
Above-described ball nut device, described joint also is connected with drive unit.
Above-described ball nut device, described drive unit can be 1 kinds in belt pulley, gear and the worm gear.
Above-described ball nut device, described joint preferably adopts the external diameter of joint to feel relieved with drive unit, and end face connects with screw.
Above-described ball nut device, described joint is with having key or pin to drive between the drive unit.
Above-described ball nut device, described rolling bearing can be the biserial angular contact radial bearings.
Above-described ball nut device, described rolling bearing can also be the combinations of tapered roller bearing or angular contact radial bearing.
For above-mentioned ball nut device, preferably also comprise bearing clearance or pre-tightness regulating device, described regulating device comprises set screw nut and gap pad, and described set screw nut is installed in the ball nut one step bearing inner ring outside, and described gap pad is installed between 2 race rings.
The beneficial effect of the utility model ball nut device is: the ball screw pair that adopts ball nut device of the present utility model to match and form with leading screw, because ball nut rotates when work, leading screw can be completely fixed, ball nut when rotating along the axial moving linearly of leading screw, the vibration problem that causes because of bending deflection in the time of can overcoming leading screw and rotate.After adopting the utility model, reduce the noise that produces because of vibration equipment, improved the operating accuracy of equipment.After adopting the utility model, can reduce the requirement of leading screw tortuosity, thus the working life of improving leading screw and ball screw pair greatly; Because exposed leading screw no longer rotates, can not constitute the threat of safety in production, also reduced a unsafe factor in the machinery.
In order to solve another technical problem, the technical solution adopted in the utility model is that a kind of rolling screw transmission device comprises frame, power plant, ball screw pair and operation mechanism; Described operation mechanism is driven by ball screw pair by power plant, ball screw pair comprises ball screw, ball and nut, leading screw in the described ball screw pair is fixed with respect to frame, described nut is the described ball nut device of a last technological scheme, and the ball nut device is by the power plant rotary driving and drive operation mechanism's moving linearly.
[description of drawings]
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is the sectional view of the utility model embodiment 1 ball nut device.
Fig. 2 is the sectional view of the utility model embodiment 2 ball nut devices.
Fig. 3 is the sectional view of the utility model embodiment 3 ball nut devices.
Fig. 4 is the mechanism driving sketch of the utility model embodiment 4 rolling screw transmission devices.
[embodiment]
In the utility model ball nut device embodiment 1 shown in Figure 1, comprise ball nut 1, the bore area of ball nut has spiral rolling track, in order to the assembling ball, forms ball screw pair together with leading screw.This device comprises that also nut seat 2, nut seat 2 mistake rolling bearings 3 are installed on the ball nut 1.The rolling bearing that present embodiment adopts is the biserial angular contact radial bearing.The inner ring of bearing 3 is installed on the outer axle journal of ball nut 1, makes axial restraint by the convex and the set screw nut 4 of ball nut 1.The outer ring of bearing 3 is installed in the endoporus of nut seat 2, makes axial restraint by the convex and the set screw nut 5 of nut seat 2.The right-hand member of ball nut 1 has the joint 1a that connects drive unit, is connected with the drive unit 6 of ball nut on it, and in the present embodiment, drive unit 6 is belt pulleys.The external diameter of ball nut 1 joint 1a is done radial location with the endoporus cooperation of belt pulley.Belt pulley connects by the joint 1a of several screws 8 with ball nut 1.The end face of the right side of the joint 1a of ball nut 1 and the endoporus of belt pulley all has keyway, flat key 7 wherein is housed, in order to transmitting torque.In the present embodiment, the biserial angular contact radial bearing adopts oil lubricating, so between nut seat 2 is with set screw nut 4, and set screw nut 5 is with oil sealing 9 all is housed between the convex of ball nut 1,0 RunddichtringO 10 is arranged, to prevent lubricating oil leakage between set screw nut 4 endoporus are with ball nut 1.In the present embodiment, belt pulley is driven by power plant, drives ball nut 1 rotation again.Leading screw in the ball screw pair is fixed, and under the effect of leading screw reaction force, ball nut 1 drives the axial moving linearly of nut seat 2 along leading screw.Connect dish on the nut seat 2, in order to connect operation mechanism.
In the utility model ball nut device embodiment 2 shown in Figure 2, the rolling bearing of employing is a double-row conical bearing.2 inner rings of bearing 3 are installed on the outer axle journal of ball nut 1, make axial restraint by the convex and the set screw nut 4 of ball nut 1, and gapped pad 11 between the inner ring of 2 bearings is in order to adjust the bearing play.The outer ring of bearing 3 is installed in the endoporus of nut seat 2, makes axial restraint by the convex and the lock ring 12 of nut seat 2.In the present embodiment, drive unit 6 is gears, and gear is with also having pin 13 transmitting torques between the joint 1a of ball nut 1 except screw 8 connections are arranged.Present embodiment uses lubricating grease to come lubricating bearings, so do not have oil sealing and seal ring, adopts the clearance seal mode.
The utility model ball nut device embodiment 3 shown in Figure 3 is that with embodiment 2 the main distinction bearing 3 has adopted 2 angular contact radial bearings, and drive unit 6 has used worm gear.Spacer ring 14 is arranged between the outer ring of 2 angular contact radial bearings, inner ring is made axial restraint with the convex and the set screw nut 4 of ball nut 1, and set screw nut 4 adjusts nut at this and uses, to adjust bearing clearance or pre-tightness, its outside also has locking nut 15, prevents that set screw nut 4 from getting loose.
Though above embodiment only provides the example of several ball nut bearings that device adopts, in fact, the bearing of each axial force of bearing radial force or bearing combination simultaneously can be adopted.
The ball screw pair that adopts ball nut device of the present utility model to match and form with leading screw, because ball nut rotates when work, leading screw can be completely fixed, ball nut when rotating along the axial moving linearly of leading screw, the vibration problem that causes because of bending deflection in the time of can overcoming leading screw and rotate.Below with 30 millimeters of leading screw diameters, 20 millimeters of helical pitches, the leading screw that length overall is 1500 millimeters is that example illustrates this problem.If the crooked position of this leading screw maximum is at the middle part of leading screw, tortuosity is 0.1 millimeter, and ball nut also is in the middle part of leading screw.So, by the kind of drive that traditional leading screw rotates, leading screw whenever turns around, ball nut along lead screw shaft in 20 millimeters of moving linearlies, up-down vibration once, amplitude is 0.2 millimeter.As adopt the utility model ball nut device, and still same leading screw, but leading screw fixes, ball nut rotates, and nut whenever turns around, and along 20 millimeters of helical pitches of axial advancement of leading screw, ball nut rotates along leading screw displacement radially much smaller than 0.2 millimeter.If with 0.1 millimeter of the tortuosity of leading screw, along the length mean allocation of leading screw, only 0.00133 millimeter of the radial displacement of each helical pitch of leading screw, only have in other words 1 micron more.In fact the bending of leading screw is an arc, is using the most frequent middle part, crooked slope minimum, so the helical pitch of whenever advancing in the middle part of leading screw, the radial displacement of nut is far from so big.What is more important because leading screw no longer rotates, at nut along lead screw shaft in the progressive process, up-down vibration no longer, just along leading screw radially direction the displacement of trace is arranged.As long as leading screw is not multiple bending, this radial displacement be nut along the leading screw axially reciprocating once, finish a circulation.Its frequency is extremely low, does not form vibration at all.So behind employing the utility model, can overcome the vibration that causes because of the leading screw bending, reduced the noise that produces because of vibration equipment, improved the operating accuracy of equipment.After adopting the utility model, can reduce the requirement of leading screw tortuosity, thus the working life of improving leading screw and ball screw pair greatly.And behind employing the utility model, exposed leading screw no longer rotates, and can not constitute the threat of safety in production, has reduced a unsafe factor in the machinery.
The utility model embodiment 4 rolling screw transmission device rolling screw transmission devices shown in Figure 4, the ball screw pair and the operation mechanism 405 that comprise frame 401, motor 402, form by leading screw 403, ball and nut 404.Operation mechanism 405 is installed on the guide rail of frame 401, is driven by ball screw pair by motor 402.The two ends of the leading screw 403 in the ball screw pair are fixed on the frame 401, and nut 404 is ball nut devices of showing among the utility model embodiment 2.The nut seat of ball nut device 404 is connected with operation mechanism 405.Actuation gear on motor 402 output shafts is by the ball nut rotation in the actuation gear drive ball nut device of ball nut device.The ball nut of rotation is fixed on the effect of leading screw 403 reaction forces on the frame, and the guide rail moving linearly of mechanism 405 along frame 401 pushes the work forward.
Claims (9)
1. a ball nut device comprises ball nut, and the bore area of described ball nut has spiral rolling track, it is characterized in that, comprises nut seat, and described nut seat is installed on the ball nut by rolling bearing; The inner ring of rolling bearing is packed on the outer axle journal of ball nut, and the outer ring of rolling bearing is packed in the endoporus of nut seat; One end of described ball nut has the joint that connects drive unit.
2. ball nut device according to claim 1 is characterized in that described joint is connected with drive unit.
3. ball nut device according to claim 2 is characterized in that, described drive unit is a kind in belt pulley, gear and the worm gear.
4. according to the described ball nut device of arbitrary claim in the claim 1 to 3, it is characterized in that described joint adopts the external diameter of joint to feel relieved with drive unit, end face connects with screw.
5. ball nut device according to claim 4 is characterized in that, described joint is with having key or pin to drive between the drive unit.
6. according to the described ball nut device of arbitrary claim in the claim 1 to 3, it is characterized in that described rolling bearing is the biserial angular contact radial bearing.
7. according to the described ball nut device of arbitrary claim in the claim 1 to 3, it is characterized in that described rolling bearing is the combination of tapered roller bearing or angular contact radial bearing.
8. ball nut device according to claim 7, it is characterized in that, comprise bearing clearance or pre-tightness regulating device, described regulating device comprises set screw nut and gap pad, described set screw nut is installed in the ball nut one step bearing inner ring outside, and described gap pad is installed between 2 race rings.
9. a rolling screw transmission device comprises frame, power plant, ball screw pair and operation mechanism; Described operation mechanism is driven by ball screw pair by power plant, ball screw pair comprises ball screw, ball and nut, it is characterized in that, leading screw in the described ball screw pair is fixed with respect to frame, described nut is the described ball nut device of claim 1, and the ball nut device is by the power plant rotary driving and drive operation mechanism's moving linearly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200160571U CN201021709Y (en) | 2006-11-29 | 2006-11-29 | Ball bearing bolt device and rolling spiral drive device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200160571U CN201021709Y (en) | 2006-11-29 | 2006-11-29 | Ball bearing bolt device and rolling spiral drive device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201021709Y true CN201021709Y (en) | 2008-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200160571U Expired - Lifetime CN201021709Y (en) | 2006-11-29 | 2006-11-29 | Ball bearing bolt device and rolling spiral drive device |
Country Status (1)
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|---|---|
| CN (1) | CN201021709Y (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748440A (en) * | 2012-07-03 | 2012-10-24 | 山西模范机械制造有限公司 | Lifting screw rod and nut security device of lost foam forming machine |
| CN102927229A (en) * | 2012-10-31 | 2013-02-13 | 西安新竹防灾救生设备有限公司 | Ball nut transmission structure |
| CN103097772A (en) * | 2010-09-06 | 2013-05-08 | Thk株式会社 | Rolling element screw assembly |
| CN103542055A (en) * | 2013-10-24 | 2014-01-29 | 南京工艺装备制造有限公司 | Swivel nut combination unit |
| CN103939551A (en) * | 2014-03-18 | 2014-07-23 | 陕西汉江机床有限公司 | Ball screw pair with nut main driving |
| CN105121911A (en) * | 2013-04-08 | 2015-12-02 | Trw汽车股份有限公司 | Pulley and gear nut with such a pulley |
| 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 |
| CN109311507A (en) * | 2016-06-22 | 2019-02-05 | 蒂森克虏伯普利斯坦股份公司 | The ball-screw of electromechanical power steering system with one-piece corner connection touching ball bearing |
| CN109538722A (en) * | 2019-01-25 | 2019-03-29 | 南京工艺装备制造有限公司 | A kind of multistage planet roller screw pair gapless linear motion actuators |
| CN111279100A (en) * | 2017-10-31 | 2020-06-12 | Thk株式会社 | Lead screw nut or spline nut |
| US10913484B2 (en) | 2016-06-22 | 2021-02-09 | Thyssenkrupp Presta Ag | Ball screw drive of an electromechanical power steering device with deflecting bodies for a ball return |
| CN114152382A (en) * | 2021-12-03 | 2022-03-08 | 山东建筑大学 | Device and method for measuring friction moment of ball screw roller pair based on axial loading |
| CN114152382B (en) * | 2021-12-03 | 2024-04-26 | 山东建筑大学 | Axial loading-based ball screw pair friction moment measuring device and method |
-
2006
- 2006-11-29 CN CNU2006200160571U patent/CN201021709Y/en not_active Expired - Lifetime
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103097772B (en) * | 2010-09-06 | 2015-03-25 | Thk株式会社 | Rolling element screw assembly |
| CN103097772A (en) * | 2010-09-06 | 2013-05-08 | Thk株式会社 | Rolling element screw assembly |
| CN102748440A (en) * | 2012-07-03 | 2012-10-24 | 山西模范机械制造有限公司 | Lifting screw rod and nut security device of lost foam forming machine |
| CN102927229A (en) * | 2012-10-31 | 2013-02-13 | 西安新竹防灾救生设备有限公司 | Ball nut transmission structure |
| CN102927229B (en) * | 2012-10-31 | 2015-03-25 | 西安新竹防灾救生设备有限公司 | Ball nut transmission structure |
| US9958050B2 (en) | 2013-04-08 | 2018-05-01 | Trw Automotive Gmbh | Belt pulley and gear nut with such a belt pulley |
| CN105121911A (en) * | 2013-04-08 | 2015-12-02 | Trw汽车股份有限公司 | Pulley and gear nut with such a pulley |
| CN105121911B (en) * | 2013-04-08 | 2018-09-04 | Trw汽车股份有限公司 | Belt pulley and the transmission nut for including this belt pulley |
| CN103542055A (en) * | 2013-10-24 | 2014-01-29 | 南京工艺装备制造有限公司 | Swivel nut combination unit |
| CN103939551A (en) * | 2014-03-18 | 2014-07-23 | 陕西汉江机床有限公司 | Ball screw pair with nut main driving |
| US10913484B2 (en) | 2016-06-22 | 2021-02-09 | Thyssenkrupp Presta Ag | Ball screw drive of an electromechanical power steering device with deflecting bodies for a ball return |
| CN109311507A (en) * | 2016-06-22 | 2019-02-05 | 蒂森克虏伯普利斯坦股份公司 | The ball-screw of electromechanical power steering system with one-piece corner connection touching ball bearing |
| CN109311507B (en) * | 2016-06-22 | 2022-03-29 | 蒂森克虏伯普利斯坦股份公司 | Ball screw for an electromechanical power steering system with an integrated angular contact ball bearing |
| 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 |
| CN111279100A (en) * | 2017-10-31 | 2020-06-12 | Thk株式会社 | Lead screw nut or spline nut |
| US11060565B2 (en) | 2017-10-31 | 2021-07-13 | Thk Co., Ltd. | Screw nut |
| CN109538722A (en) * | 2019-01-25 | 2019-03-29 | 南京工艺装备制造有限公司 | A kind of multistage planet roller screw pair gapless linear motion actuators |
| CN114152382A (en) * | 2021-12-03 | 2022-03-08 | 山东建筑大学 | Device and method for measuring friction moment of ball screw roller pair based on axial loading |
| CN114152382B (en) * | 2021-12-03 | 2024-04-26 | 山东建筑大学 | Axial loading-based ball screw pair friction moment measuring device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shenzhen Weiyuan Precision Technology Ltd. Assignor: Li Jingyu Contract fulfillment period: 2009.9.16 to 2014.9.15 Contract record no.: 2009440001465 Denomination of utility model: Ball bearing bolt device and rolling spiral drive device Granted publication date: 20080213 License type: Exclusive license Record date: 20090924 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.9.16 TO 2014.9.15; CHANGE OF CONTRACT Name of requester: SHENZHEN CITY WEIYUAN PRECISION TECHNOLOGY CO., LT Effective date: 20090924 |
|
| CX01 | Expiry of patent term |
Granted publication date: 20080213 |
|
| EXPY | Termination of patent right or utility model |