CN104595446B - A kind of new Anti-blocking device of electromechanical actuator - Google Patents
A kind of new Anti-blocking device of electromechanical actuator Download PDFInfo
- Publication number
- CN104595446B CN104595446B CN201310524332.5A CN201310524332A CN104595446B CN 104595446 B CN104595446 B CN 104595446B CN 201310524332 A CN201310524332 A CN 201310524332A CN 104595446 B CN104595446 B CN 104595446B
- Authority
- CN
- China
- Prior art keywords
- support ring
- leading screw
- copper ball
- electromechanical actuator
- face
- 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.)
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Classifications
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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
- F16H25/2021—Screw mechanisms with means for avoiding overloading
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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
- 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
- F16H2025/204—Axial sliding means, i.e. for rotary support and axial guiding of nut or screw shaft
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The invention belongs to space flight servo techniques fields, and in particular to a kind of new Anti-blocking device of electromechanical actuator；The object of the present invention is to provide a kind of new Anti-blocking devices of electromechanical actuator for rolling spiral drive class electromechanical actuator；Including copper ball（1）, support ring（2）, slotted countersunk flat head screw（3）And leading screw（4）, wherein support ring（2）Left side endoporus is radial positioning face, with leading screw（4）Periphery for transition match somebody with somebody 4 slot sunk screws of merga pass（3）Connection fastening, copper ball（1）It is embedded in support ring（2）Right side inboard raceways in；Effectively reduce the pretightning force of generation, prevent that worm drive vice card is dead, effectively improve the reliability of electromechanical actuator, with the ability for absorbing shock loading, and with preferable overload performance, beneficial to the realization of miniaturization, and ball material elects beryllium-bronze as, meet applying working condition, elasticity modulus is relatively low, yield strength is relatively high.
Description
Technical field
The invention belongs to space flight servo techniques fields, and in particular to a kind of new Anti-blocking device of electromechanical actuator.
Background technology
Rolling spiral drive formula electromechanical actuator is when controlling open loop, it may appear that leading screw and nut end face fitting, and occur
Stuck phenomenon, for the problem, there are two aspects for analysis main cause：The existing transmission end face structure of 01 models is flat
When fitting, lubricating grease is scribbled in the gap of transmission engagement place for face, so that transmission forms an annular seal space, leading screw
It needs to overcome the resistance when unclamping with nut；02 leading screws and nut end face can generate end-face friction, leading screw and nut when being bonded
It needs to overcome the stiction during release, the size of the stiction depends on pretightning force and end face structure, open loop generally occurs
When, pretightning force is larger, has only and is realized by changing the form of end face structure and frictional force.Present invention seek to address that it asks above
Topic, and propose a kind of new Anti-blocking device.
The content of the invention
The object of the present invention is to it in view of the shortcomings of the prior art, provides a kind of for rolling spiral drive class electromechanical actuator
Electromechanical actuator with new Anti-blocking device.
The technical scheme is that：
A kind of new Anti-blocking device of electromechanical actuator, including copper ball, support ring, slotted countersunk flat head screw and leading screw,
Endoporus is radial positioning face on the left of middle support ring, is connected with the periphery of leading screw for transition with 4 slot sunk screws of merga pass
Fastening, copper ball are embedded in the right side inboard raceways of support ring.
The raceway arc chord angle is 60 °, and leading screw section arc chord angle is 150 °.
The radius of curvature of the support ring is 1.05 times of copper ball, and the radius of curvature of leading screw end face raceway is the 1.05 of copper ball
Times.
The copper ball and the contact point of support ring for the copper ball centre of sphere along support ring radially and the intersection point of support ring raceway, copper ball
It is the copper ball centre of sphere along the axial intersection point with leading screw end face raceway of leading screw with the contact point of leading screw end face raceway.
The beneficial effects of the invention are as follows：
1. when electromechanical actuator works to extreme position, by nut end face and the sliding friction of leading screw end contact generation
Rolling friction is converted into, effectively reduces the pretightning force of generation, prevents that worm drive vice card is dead, effectively improve electromechanical actuator can
By property；
It is axial, radial space is compact 2. the Anti-blocking device and rolling screw pair are highly integrated, make full use of nut and
The end face of leading screw does not increase axial dimension additionally, space product is suitble to require strictly bulk as arc contact surface
Feature；
3. the Anti-blocking device selects ball Contact Pair, design feature is determined with the ability for absorbing shock loading, and
With preferable overload performance, beneficial to the realization of miniaturization, and ball material elects beryllium-bronze as, meets applying working condition,
Its elasticity modulus is relatively low, yield strength is relatively high；
4. support ring material elects polytetrafluoroethylene (PTFE) as, possess certain self-lubricating property, and meet applying working condition carrying
Smaller feature.
Description of the drawings
Fig. 1 is a kind of new Anti-blocking device schematic diagram of electromechanical actuator；
Fig. 2 is to be rolled into arc chord angle schematic diagram；
Fig. 3 is that support ring and leading screw section are rolled into radius of curvature schematic diagram；
Wherein, 1. copper balls, 2. support rings, 3. slotted countersunk flat head screws, 4. leading screws.
Specific embodiment
A kind of electromechanical actuator proposed by the present invention is carried out with new Anti-blocking device with embodiment below in conjunction with the accompanying drawings
It is further to introduce：
The new Anti-blocking device of a kind of electromechanical actuator, including copper ball 1, support ring 2, slotted countersunk flat head screw 3 and leading screw
4, wherein 2 left side endoporus of support ring is radial positioning face, and the periphery with leading screw 4 is transition with 4 fluting countersunk heads of merga pass
The connection fastening of screw 3, copper ball 1 are embedded in the right side inboard raceways of support ring 2.
The raceway arc chord angle is 60 °, and 4 section arc chord angle of leading screw is 150 °.
The radius of curvature of the support ring 2 is 1.05 times of copper ball 1, and the radius of curvature of 4 end face raceway of leading screw is copper ball 1
1.05 again.
The contact point of the copper ball 1 and support ring 2 is the copper ball centre of sphere along 2 radial direction of support ring and the intersection point of support ring raceway,
The contact point of copper ball 1 and 4 end face raceway of leading screw is the copper ball centre of sphere along the axial intersection point with 4 end face raceway of leading screw of leading screw 4.
When electromechanical actuator works to extreme position, the sliding friction that nut end face and leading screw end contact generate is turned
Rolling friction is turned to, effectively reduces the pretightning force of generation, prevents that worm drive vice card is dead, effectively improves the reliable of electromechanical actuator
Property.
When servo mechanism controls open loop, ball-screw end face mutually to be hit with nut end face, both ends of the surface have circumferentially opposed fortune
Dynamic, copper ball 1 preferably changes sliding friction as rolling friction, and avoids the formation of ball screw assembly, closed chamber, in leading screw 4
It is rolled in the arc raceway formed with support ring 2.
When electromechanical actuator works to extreme position, the sliding friction that nut end face and leading screw end contact generate is turned
Rolling friction is turned to, effectively reduces the pretightning force of generation, prevents that worm drive vice card is dead, effectively improves the reliable of electromechanical actuator
Property；The Anti-blocking device and rolling screw pair are highly integrated, axial, radial space is compact, make full use of nut and leading screw
End face does not increase axial dimension additionally, space product is suitble to require the characteristics of stringent to bulk as arc contact surface；It should
Anti-blocking device selects ball Contact Pair, and design feature is determined with the ability for absorbing shock loading, and with preferable super
Performance is carried, beneficial to the realization of miniaturization, and ball material elects beryllium-bronze as, meets applying working condition, elasticity modulus phase
To it is relatively low, yield strength is relatively high；Retainer ring materials elect polytetrafluoroethylene (PTFE) as, possess certain self-lubricating property, and accord with
It closes applying working condition and carries smaller feature.
Claims (1)
1. a kind of new Anti-blocking device of electromechanical actuator, it is characterised in that：It is heavy including copper ball (1), support ring (2), fluting
Endoporus is radial positioning face on the left of head screw (3) and leading screw (4), wherein support ring (2), and the periphery with leading screw (4) is transition
With 4 slot sunk screw (3) connection fastenings of merga pass, copper ball (1) is embedded in the right side inboard raceways of support ring (2)；
The raceway arc chord angle is 60 °, and leading screw (4) section arc chord angle is 150 °；
The radius of curvature of the support ring (2) is 1.05 times of copper ball (1), and the radius of curvature of leading screw (4) end face raceway is copper ball
(1) 1.05 times；
The contact point of the copper ball (1) and support ring (2) is the copper ball centre of sphere along support ring (2) the radially friendship with support ring raceway
Point, the contact point of copper ball (1) and leading screw (4) end face raceway are axial with leading screw (4) end face raceway along leading screw (4) for the copper ball centre of sphere
Intersection point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310524332.5A CN104595446B (en) | 2013-10-30 | 2013-10-30 | A kind of new Anti-blocking device of electromechanical actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310524332.5A CN104595446B (en) | 2013-10-30 | 2013-10-30 | A kind of new Anti-blocking device of electromechanical actuator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104595446A CN104595446A (en) | 2015-05-06 |
| CN104595446B true CN104595446B (en) | 2018-05-18 |
Family
ID=53121411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310524332.5A Active CN104595446B (en) | 2013-10-30 | 2013-10-30 | A kind of new Anti-blocking device of electromechanical actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104595446B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111140880B (en) * | 2020-01-02 | 2021-07-09 | 宁波方太厨具有限公司 | Air door adjusting device and gas stove comprising same |
| JP2022109519A (en) * | 2021-01-15 | 2022-07-28 | Ntn株式会社 | Linear motion actuator |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2912588Y (en) * | 2004-11-26 | 2007-06-20 | 马英华 | Hospital bed on situ protective device |
| CN201714932U (en) * | 2010-05-17 | 2011-01-19 | 彭中 | Screw driving positioning device |
| CN202659837U (en) * | 2012-05-31 | 2013-01-09 | 常州市凯迪电器有限公司 | Ball screw type electric linear driver with limiting slip |
| CN102889352B (en) * | 2012-10-15 | 2015-06-10 | 中国航天科工集团第二研究院二十三所 | Backstop used for transmission spacing of lead screw and silk nut |
| 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 |
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2013
- 2013-10-30 CN CN201310524332.5A patent/CN104595446B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104595446A (en) | 2015-05-06 |
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