CN108253106A - A kind of leading screw and nut mechanism - Google Patents
A kind of leading screw and nut mechanism Download PDFInfo
- Publication number
- CN108253106A CN108253106A CN201611243621.8A CN201611243621A CN108253106A CN 108253106 A CN108253106 A CN 108253106A CN 201611243621 A CN201611243621 A CN 201611243621A CN 108253106 A CN108253106 A CN 108253106A
- Authority
- CN
- China
- Prior art keywords
- nut
- screw
- protective cover
- guide groove
- mounting 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.)
- Withdrawn
Links
- 230000007246 mechanism Effects 0.000 title claims abstract description 30
- 230000033001 locomotion Effects 0.000 claims abstract description 19
- 230000035939 shock Effects 0.000 claims abstract description 5
- 230000001681 protective effect Effects 0.000 claims description 25
- 238000009434 installation Methods 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 10
- 230000005484 gravity Effects 0.000 claims description 4
- 230000009471 action Effects 0.000 abstract description 2
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000001133 acceleration Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
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
- F16H25/2003—Screw mechanisms with arrangements for taking up backlash
- F16H25/2006—Screw mechanisms with arrangements for taking up backlash with more than one nut or with nuts consisting of more than one bearing part
-
- 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
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
-
- 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
- F16H57/00—General details of gearing
- F16H57/0006—Vibration-damping or noise reducing means specially adapted for gearings
-
- 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
-
- 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
- F16H2025/2084—Perpendicular arrangement of drive motor to screw axis
Abstract
A kind of leading screw and nut mechanism, including driving source, screw and the first nut, screw is vertically arranged and is rotated by driving source, first nut is mounted on screw, characterized by further comprising have the second nut and elastic component, second nut is mounted on screw and positioned at the lower section of first nut, elastic component is set between the first nut and the second nut and has elastic force straight up to the first nut, and then the first nut is avoided to generate shock with screw due to the fit clearance between screw during the motion.The advantage of the invention is that：The elastic component between the first nut and the second nut in the leading screw and nut mechanism can generate the first nut elastic force straight up, first nut is under the action of the elastic force, it can be to avoid generating shock with screw during fit clearance existing between screw during the motion, so as to which leading screw and nut mechanism be avoided to generate noise and shake during the work time so that its operation conditions can be in optimum state always.
Description
Technical field
The present invention relates to mechanical transmission mechanism, more particularly, to a kind of leading screw and nut mechanism.
Background technology
Leading screw and nut mechanism is the common transmission mechanism of machinery field, mainly includes two phase interworkings of screw and nut
The component of conjunction in general, load is mounted on nut, drives nut and load that can carry out phase along screw by the rotation of screw
It should move.At present, due to factors such as processing precision of products, the fit clearance of leading screw and nut mechanism is objective reality, i.e., at certain
A little cooperation positions certainly exist certain gap between the screw thread of nut and the screw thread of screw.The silk placed vertically for screw
For stem nut mechanism, nut can be included the dead weight of the gravity, nut of load by the resultant force F continued in downward direction, resultant force F
And component of the frictional force between screw and nut in vertically downward direction, when screw rotation and the downward uniform motion of nut
In the process, due to the presence of above-mentioned fit clearance, when nut moves to the position in gap, because the direction of resultant force F is downward, with
The direction of motion is identical, thus nut is made to will appear of short duration weightlessness, and downward acceleration can increase nut movement velocity, then
The lower interface in gap is hit, so as to generate impact noise, and such situation periodically occurs generally with the rotation of screw.It can
See, existing this leading screw and nut mechanism inevitably will appear operation noise and shake in the process of running.In conclusion need to existing
Some leading screw and nut mechanisms are further improved.
Invention content
The technical problems to be solved by the invention are present situations for the above-mentioned prior art, and providing a kind of can effectively eliminate movement
Noise and the leading screw and nut mechanism of shake in the process.
Technical solution is used by the present invention solves above-mentioned technical problem：The leading screw and nut mechanism, including driving source, silk
Bar and the first nut, the screw is vertically arranged and is rotated by driving source, and first nut is mounted on screw,
It is characterized in that：The second nut and elastic component are further included, second nut is mounted on the screw and positioned at described the
The lower section of one nut, the elastic component are set between the first nut and the second nut and have straight up to the first nut
Elastic force, and then the first nut is avoided to generate shock with screw due to the fit clearance between screw during the motion.
Elastic component can be there are many structure, it is preferable that and the bottom surface of first nut is equipped with the first installation step of indent,
The top surface of second nut is equipped with the second installation step of indent, and the elastic component is the spring being set on screw, institute
The both ends for stating spring are supported respectively on the first installation step and the second installation step described in being located at.
Further preferably, on first nut be used for installation load, the elastic component to the first nut generate vertically to
On elastic force F ＇, frictional force between the load gravity, the dead weight of the first nut and the first nut and screw vertically to
The component in lower direction forms resultant force F, also, the size of the elastic force F ＇ and resultant force F meets F ＇=F.In this way, the first nut to
It is upper to move and impact noise is all generated between screw during moving downward, so as to make the operation shape of leading screw and nut mechanism
Condition is best.
As the preferred of any of the above-described scheme, the driving source is driving motor, is pacified on the output shaft of the driving motor
Equipped with screw rod, the transmission gear that is coaxially disposed and can rotate synchronously with screw, the transmission are installed in the end of the screw
Gear is meshed with the screw rod.
Further preferably, upper mounting seat, lower mounting seat and the silk being fixed between upper mounting seat and lower mounting seat are further included
Bar protective cover is equipped with clutch shaft bearing in the upper mounting seat, and the upper end of the screw is mounted on the clutch shaft bearing, in institute
It states and second bearing is installed in lower mounting seat, the lower end of the screw is mounted in the second bearing, on the screw protective cover
The bar hole being vertically distributed is provided with, first nut and the second nut have locally through the bar hole and expose to institute
The screw protective cover stated.
In order to make the movement of the first nut and the second nut more steady, between first nut and screw protective cover with
And it is equipped with guiding fit structure between second nut and screw protective cover.
The guiding fit structure can be there are many structure, it is preferable that the guiding fit structure is vertically led including first
It is set on to slot, the first vertical convex ribs, the second vertical guide groove and the second vertical guiding convex ribs, first vertical guide groove of being oriented to
On the lateral wall of the screw protective cover and positioned at the left and right sides of the bar hole, the described first vertical convex ribs that are oriented to are set on the
It on one nut and the second nut and is embedded in the described first vertical guide groove, the second vertical guide groove is set on the screw
On the madial wall of protective cover, the second vertical guide groove and the first vertical guide groove are respectively arranged on the both sides of the screw, institute
The second vertical convex ribs that are oriented to are stated to be set on first nut and the second nut and be embedded in the described second vertical guide groove.
Compared with prior art, the advantage of the invention is that：The leading screw and nut mechanism is provided with below the first nut
Second nut, and the elastic force that the elastic component between the first nut and the second nut can be to the generation of the first nut straight up, first
Nut, can be to avoid producing existing between screw under the action of the elastic force during fit clearance with screw during the motion
It is raw to hit, so as to which leading screw and nut mechanism be avoided to generate noise and shake during the work time so that its operation conditions can be located always
In optimum state.
Description of the drawings
Fig. 1 is the structure diagram of the embodiment of the present invention；
Fig. 2 is to remove the structure diagram after screw protective cover in Fig. 1；
Fig. 3 is the lateral partial structurtes sectional view of the embodiment of the present invention；
Fig. 4 is the structure diagram of the screw protective cover of the embodiment of the present invention；
Fig. 5 is the structure diagram of the first nut of the embodiment of the present invention；
Fig. 6 is the structure diagram of the second nut of the embodiment of the present invention；
Fig. 7 is screw, the first nut and the matched structure diagram of the second nut of the embodiment of the present invention.
Specific embodiment
The present invention is described in further detail below in conjunction with attached drawing embodiment.
As shown in Fig. 1 to 7, leading screw and nut mechanism in the present embodiment includes driving motor 1, screw 2, the first nut 3, the
Two nuts 4, spring 5, screw rod 6, transmission gear 7, upper mounting seat 8, lower mounting seat 9, screw protective cover 10, clutch shaft bearing 11,
Two bearings, 12 grade primary clusterings.Wherein, screw 2 is vertically arranged, and screw rod 6 laterally sets and mounted on the output shaft of driving motor 1
On, the transmission gear 7 that is coaxially disposed and can rotate synchronously with screw 2, transmission gear 7 and screw rod 6 are installed in 2 upper end of screw
Be meshed, in this way, driving motor 1 by the transmission of screw rod 6 and transmission gear 7 with regard to screw 2 can be driven to be rotated.
First nut 3 and the second nut 4 are installed on screw 2, and the second nut 4 is located at the lower section of the first nut 3, bullet
Spring 5 is set on screw 2 and between the first nut 3 and the second nut 4.The bottom surface of first nut 3 is equipped with the first of indent
Installation step 31, the top surface of the second nut 4 are equipped with the second installation step 41 of indent, and the both ends of spring 5 are supported respectively is located at first
On 31 and second installation step 41 of installation step.
First nut 3 is for main nut and for installation load, the gravity of load, the dead weight of the first nut 3 and the first spiral shell
Frictional force between female and screw forms resultant force F in the component of vertically downward direction, and spring 5 has the first nut 3 always
Elastic force F ＇ straight up.
Two kinds of situations when the first nut of analysis below 3 is moved downward and moved upwards：
1., screw 2 rotation drive 3 downward uniform motion of the first nut
As 0≤F ＇ ＜ F, when the first nut 3 moves to the position in gap just, because F ＇ and F resultant direction to
Under, it is identical with the direction of motion of the first nut 3, at this point, the first nut 3 will appear of short duration weightlessness, downward acceleration
It can make the movement velocity of the first nut 3 increase, the lower interface in gap then be hit, so as to generate impact noise, such case one
As with the rotation of screw 2 and periodically occur.
As F ＇ >=F, the resultant direction of F ＇ and F are upward, and the direction of motion with the first nut 3 is on the contrary, at this point, the first nut
3 will not occur weightlessness, and mechanism will not generate noise and shake in the process of running；
2., screw 2 rotation drive 3 upward uniform motion of the first nut
As 0≤F ＇≤F, the resultant direction of F ＇ and F are downward, and the direction of motion with the first nut 3 is on the contrary, at this point, first
Weightlessness will not occur for nut 3, and mechanism will not generate noise and shake in the process of running；
As F ＇ ＞ F, when the first nut 3 moves to the position in gap just, because the resultant direction of F ＇ and F are upward,
Identical with the direction of motion of the first nut 3, at this point, the first nut 3 will appear of short duration weightlessness, mechanism can produce in the process of running
Raw noise and shake.
The above-mentioned two motion process of comprehensive first nut 3 can exist it is found that when meeting F ＇=F to avoid the first nut 3
Shock is generated with screw 2 due to the fit clearance between screw 2 in motion process up and down, and then avoids feed screw nut
Mechanism generates noise and shake during the work time.
In order to protect screw 2, screw protective cover 10 is covered with outside screw 2, the both ends of screw protective cover 10 are installed respectively
There are upper mounting seat 8 and lower mounting seat 9.Clutch shaft bearing 11 is installed in upper mounting seat 8, the upper end of screw 2 is mounted on first axle
It holds on 11, second bearing 12 is installed in lower mounting seat 9, the lower end of screw 2 is mounted in second bearing 12.Screw protective cover
The bar hole 13 being vertically distributed is provided on 10, the first nut 3 and the second nut 4 have locally through bar hole 13 and expose to silk
Bar protective cover 10.
In order to which the first nut 3, the second nut 4 and the load on the first nut 3 is enable steadily to move,
Guiding fit structure is equipped between one nut 3 and the second nut 4 and screw protective cover 10.In the present embodiment, guiding cooperation
Structure is vertically oriented to convex including the vertical guiding convex ribs 15 of the first vertical guide groove 14, first, the second vertical guide groove 16 and second
Muscle 17, wherein, the first vertical guide groove 14 is set on the lateral wall of screw protective cover 10 and is located at the left and right sides of bar hole 13,
The first vertical convex ribs 15 that are oriented to are set on the corresponding position of the first nut 3 and the second nut 4 and are embedded in the first vertical guide groove
In 14；Second vertical guide groove 16 is set on the madial wall of screw protective cover 10, and the second vertical guide groove 16 and first is vertically led
It is respectively arranged on the both sides of screw 2 to slot 14, in the present embodiment, second is equipped on two adjacent inside side walls of screw protective cover 10
Vertical guide groove 16, the second vertical convex ribs 17 that are oriented to are set on the corresponding position of the first nut 3 and the second nut 4 and are embedded the
In two vertical guide grooves 16.
The foregoing is merely the preferred embodiment of the present invention, it is noted that for those of ordinary skills,
Under the premise of the principle of the present invention is not departed from, a variety of remodeling or improvement can be carried out to the present invention, these are regarded as the present invention
Protection domain within.
Claims (7)
1. a kind of leading screw and nut mechanism, including driving source, screw (2) and the first nut (3), the screw (2) is vertically arranged simultaneously
In being rotated by for driving source, first nut (3) is on screw (2), it is characterised in that：The second spiral shell is further included
Female (4) and elastic component, second nut (4) on the screw (2) and positioned at the lower section of first nut (3),
The elastic component is set between the first nut (3) and the second nut (4) and has bullet straight up to the first nut (3)
Power, and then the first nut (3) is avoided to generate shock with screw due to the fit clearance between screw (2) during the motion.
2. leading screw and nut mechanism according to claim 1, it is characterised in that：The bottom surface of first nut (3) is equipped with interior
Recessed the first installation step (31), the top surface of second nut (4) are equipped with the second installation step (41) of indent, the bullet
Property part be the spring (5) being set on screw (2), the both ends of the spring (5) are supported is located at first installation step respectively
(31) and on the second installation step (41).
3. leading screw and nut mechanism according to claim 1, it is characterised in that：It is used for installing on first nut (3) negative
Carry, the elastic component generates the first nut elastic force F ＇ straight up, the load gravity, the first nut (3) dead weight with
And the first frictional force between nut and screw forms resultant force F, also, the elastic force F ＇ and conjunction in the component of vertically downward direction
The size of power F meets F ＇=F.
4. according to the leading screw and nut mechanism described in claims 1 or 2 or 3, it is characterised in that：The driving source is driving motor
(1), screw rod (6) is installed on the output shaft of the driving motor (1), is equipped in the end of the screw (2) and screw (2)
The transmission gear (7) that is coaxially disposed and can rotate synchronously, the transmission gear (7) are meshed with the screw rod (6).
5. leading screw and nut mechanism according to claim 4, it is characterised in that：Further include upper mounting seat (8), lower mounting seat
(9) and the screw protective cover (10) that is fixed between upper mounting seat and lower mounting seat, is equipped in the upper mounting seat (8)
One bearing (11), the upper end of the screw (2) are mounted on the clutch shaft bearing (11), are equipped in the lower mounting seat (9)
Second bearing (12), the lower end of the screw (2) are mounted in the second bearing (12), are provided on the screw protective cover (10)
The bar hole (13) being vertically distributed, first nut (3) and the second nut (4) have locally through the bar hole (13)
And expose to the screw protective cover (10).
6. leading screw and nut mechanism according to claim 5, it is characterised in that：First nut (3) and screw protective cover
(10) guiding fit structure is equipped between and between second nut (4) and screw protective cover (10).
7. leading screw and nut mechanism according to claim 6, it is characterised in that：It is vertical that the guiding fit structure includes first
Guide groove (14), the first vertical guiding convex ribs (15), the second vertical guide groove (16) and the second vertical guiding convex ribs (17) are described
First vertical guide groove (14) is on the lateral wall of the screw protective cover (10) and positioned at the left and right of the bar hole (13)
Both sides, the described first vertical guiding convex ribs (15) are on the first nut (3) and the second nut (4) and are embedded perpendicular described first
To in guide groove (14), the second vertical guide groove (16) is on the madial wall of the screw protective cover (10), and described the
Two vertical guide grooves (16) and the first vertical guide groove (14) are respectively arranged on the both sides of the screw (2), and described second vertically leads
It on first nut (3) and the second nut (4) and is embedded in the described second vertical guide groove (16) to convex ribs (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611243621.8A CN108253106A (en) | 2016-12-29 | 2016-12-29 | A kind of leading screw and nut mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611243621.8A CN108253106A (en) | 2016-12-29 | 2016-12-29 | A kind of leading screw and nut mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108253106A true CN108253106A (en) | 2018-07-06 |
Family
ID=62719178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611243621.8A Withdrawn CN108253106A (en) | 2016-12-29 | 2016-12-29 | A kind of leading screw and nut mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108253106A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021139460A1 (en) * | 2020-01-07 | 2021-07-15 | 丽水市英特轴承有限公司 | Novel screw nut pair |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1457409A (en) * | 2001-01-23 | 2003-11-19 | 索尼公司 | Feed screw driver and infromation recorder/reproducer |
| CN1699792A (en) * | 2004-05-14 | 2005-11-23 | 浜国际有限公司 | Moving body and actuating device having the same |
| CN102094950A (en) * | 2009-12-09 | 2011-06-15 | 鸿富锦精密工业（深圳）有限公司 | Screw thread transmission mechanism and combined nut adopted by same |
| CN202326960U (en) * | 2011-11-12 | 2012-07-11 | 嵇魁 | Anti-backlash self-adjusting non-return leadscrew nut |
| CN104776184A (en) * | 2014-01-14 | 2015-07-15 | 麦克森发电机股份公司 | Backlash-free spindle nut |
| CN205618620U (en) * | 2016-02-24 | 2016-10-05 | 北京润科通用技术有限公司 | Accurate position adjustment device and ball thereof |
| CN206290662U (en) * | 2016-12-29 | 2017-06-30 | 宁波方太厨具有限公司 | A kind of leading screw and nut mechanism |
-
2016
- 2016-12-29 CN CN201611243621.8A patent/CN108253106A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1457409A (en) * | 2001-01-23 | 2003-11-19 | 索尼公司 | Feed screw driver and infromation recorder/reproducer |
| CN1699792A (en) * | 2004-05-14 | 2005-11-23 | 浜国际有限公司 | Moving body and actuating device having the same |
| CN102094950A (en) * | 2009-12-09 | 2011-06-15 | 鸿富锦精密工业（深圳）有限公司 | Screw thread transmission mechanism and combined nut adopted by same |
| CN202326960U (en) * | 2011-11-12 | 2012-07-11 | 嵇魁 | Anti-backlash self-adjusting non-return leadscrew nut |
| CN104776184A (en) * | 2014-01-14 | 2015-07-15 | 麦克森发电机股份公司 | Backlash-free spindle nut |
| CN205618620U (en) * | 2016-02-24 | 2016-10-05 | 北京润科通用技术有限公司 | Accurate position adjustment device and ball thereof |
| CN206290662U (en) * | 2016-12-29 | 2017-06-30 | 宁波方太厨具有限公司 | A kind of leading screw and nut mechanism |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021139460A1 (en) * | 2020-01-07 | 2021-07-15 | 丽水市英特轴承有限公司 | Novel screw nut pair |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180706 |