CN201231421Y - Vertical displacement mechanism - Google Patents
Vertical displacement mechanism Download PDFInfo
- Publication number
- CN201231421Y CN201231421Y CNU2008201093821U CN200820109382U CN201231421Y CN 201231421 Y CN201231421 Y CN 201231421Y CN U2008201093821 U CNU2008201093821 U CN U2008201093821U CN 200820109382 U CN200820109382 U CN 200820109382U CN 201231421 Y CN201231421 Y CN 201231421Y
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- CN
- China
- Prior art keywords
- screw rod
- feed screw
- screw nut
- workbench
- lug
- 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.)
- Expired - Fee Related
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Abstract
The utility model belongs to a precision machinery technology and relates to a vertical displacement mechanism. The utility model adopts a screw rod nut mechanism which mainly comprises four screw rods and four screw rod nuts or comprises three screw rods and three screw rod nuts, wherein the screw rod nuts are connected with a worktable, each screw rod only retains a degree of freedom for rotating a shaft core of each screw rod, and each screw rod nut only retains a degree of freedom for making linear displacement along the axis of each screw rod. When the screw rods are driven to rotate by another driving device, the screw rod nuts move up and down along the screw rods so that the worktable also moves up and down. Through the mutual match of the four screw rod nuts, the worktable not only can vertically move, but also can make attitude adjustment within a small angle range (about 5 degrees), and the crew rod nuts simultaneously take double effects of guide and transmission without additionally exerting other mechanisms which singly take the effects of guide and transmission.
Description
Technical field
The utility model belongs to precision machinery technology, relates to a kind of vertical displacement mechanism.
Background technology
More existingly can make workpiece do precision to be better than 0.01mm, stroke gearshift greater than 10mm, the main workbench that adopts " lever " or principles such as " drifts ", its lever construction such as Fig. 3, form a tertiary gear reducing gear by 5 gears 11,12,13,14 and 15 among the figure, gear 11 links to each other with handwheel, the rotation of handwheel becomes the minor rotation of sector gear 16, in fact sector gear 16 is exactly a lever, this lever 16 is that center of rotation is made minor rotation with part 17, finally drives part 19 by part 18 and moves up and down.The shortcoming of these devices is that Motion Resolution power is low, and repeatable accuracy is poor, and the workpiece attitude can not be adjusted.
Adopt the workbench of drift principle, as shown in Figure 4, part 21,22,23,24 is spiral micro-displacement mechanisms among the figure, part 21 links to each other with handwheel, the rotation of handwheel becomes the straight-line displacement of push rod 23, push rod 23 promotes drift 25 again and does straight-line displacement, and drift push work platform 26 is again done straight-line displacement up and down.These two kinds of displacement platforms easily produce backlash because transmission link is many, and friction is big, so transmission resolving power and repetitive positioning accuracy degree can be very not high.
Summary of the invention
The purpose of this utility model is: propose that a kind of Motion Resolution power height, repeatable accuracy are good, the adjustable a kind of vertical displacement of workpiece attitude mechanism.Technical solution of the present utility model is that it is that four groups of axles are that vertical level is evenly distributed on the excircle of workbench that displacement mechanism has been formed identical four groups of axles by 4 feed screw nuts;
There is lug in the even branch of lower surface outer rim of workbench, and the end face of each lug has a through hole, a groove; Have a through hole, a groove on the end face of feed screw nut one side on the position relative with lug, the upper end of spring is inserted in the through hole on the lug, and hangs on the rope pin by cord; The lower end of spring is inserted in the through hole on the feed screw nut, and hangs on the bayonet lock; Insert steel ball in groove on the lug and the groove on the feed screw nut; The center of each feed screw nut screws in the leading screw that is complementary with feed screw nut.
The lower surface outer rim of workbench is provided with and the corresponding lug of feed screw nut quantity.
Feed screw nut is the ball-screw nut of little helical pitch.
Each leading screw by ceramic motor (its radial drive or by stepper motor, servomotor in its axial driving.
The utility model has adopted a kind of screw-nut body, this mechanism utilizes 3 or 4 leading screws and 3 or 4 feed screw nuts, feed screw nut is connected with workbench, and leading screw only keeps wrapping wire thick stick axle center rotation one degree of freedom, and feed screw nut only keeps along the leading screw axis does the straight-line displacement one degree of freedom.When leading screw is driven rotation by other drive unit, feed screw nut will be done upper and lower moving along leading screw, thereby make workbench also do upper and lower motion.Cooperatively interact between each feed screw nut of the utility model, workbench not only can be done upper and lower motion, and the adjustment that can in low-angle (about 5 °) scope, gesture, feed screw nut plays guiding and two effects of transmission at the same time, need not apply the mechanism that other plays guiding or transmission separately in addition again.The utility model adopts the ball-screw nut of little helical pitch to improve Motion Resolution power, and the steel ball between workbench and feed screw nut can be adjusted the workpiece attitude.This vertical displacement mechanism resolving power can reach 0.0005mm.Stroke is greater than 30mm.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the syndeton schematic diagram of workbench of the present utility model and feed screw nut;
Fig. 3 is a kind of lever micro-displacement mechanism figure of the prior art;
Fig. 4 is a kind of drift micro-displacement mechanism figure of the prior art;
Fig. 5 is that the attitude of the utility model mechanism is adjusted principle schematic;
Fig. 6 is the operation principle schematic diagram of the spring of the utility model mechanism;
Fig. 7 is the leading screw type of drive and the leading screw both ends structural representation of the utility model mechanism.
The specific embodiment
As Fig. 1, workbench 1, leading screw 2, feed screw nut 3.It is that four groups of axles are that vertical level is evenly distributed on the excircle of workbench 1 that 4 feed screw nuts 3 have been formed identical four groups of axles;
Fig. 2 understands each axle system, the structural relation of leading screw and feed screw nut, and the method for attachment of feed screw nut and workbench specifically.
There is lug 6 in the even branch of lower surface outer rim of workbench 1, and the end face of each lug 6 has a through hole 4, a groove 8; Have a through hole 7, a groove 10 on the end face of feed screw nut 3 one sides on the position relative with lug 6, the upper end of spring 5 is inserted in the through hole 4 on the lug 6, and hangs on the rope pin 28 by cord 29; The lower end of spring 5 is inserted in the through hole 7 on the feed screw nut 3, and hangs on the bayonet lock 34; Insert steel ball 9 in groove 8 on the lug 6 and the groove 10 on the feed screw nut 3; The center of each feed screw nut 3 screws in the leading screw 2 that is complementary with feed screw nut 3.
The lower surface outer rim of workbench 1 is provided with and the corresponding lug 6 of feed screw nut quantity.
Each leading screw 2 by ceramic motor 32 its radial drive or by stepper motor, servomotor in its axial driving.
Fig. 6 has illustrated how 5 of Fig. 2 medi-springs work.Because of workbench 1 is floating resting on the steel ball 9, little as workbench 1 weight, workbench 1 and steel ball 9 to contact meeting unreliable.Spring 5 plays the effects that the steel ball 9 that makes on workbench 1 and the feed screw nut 3 reliably contacts, and at this moment, spring force has been equivalent to strengthen the weight of workbench 1.Fig. 6 is the fundamental diagram how spring 5 works.When needs are adjusted spring 5 pulling force, rotate rope pin 28 and can make cord 29 elongated or shorten, when cord 29 is elongated, the pulling force of spring 5 diminishes, and when cord 29 shortened, it is big that the pulling force of spring 5 becomes, when the pulling force of spring 5 was adjusted to required size, lock-screw 27 can not rotate rope pin 28.
Fig. 5 can illustrate the principle that this attitude is adjusted, and is higher than the right side such as now measuring workbench 1 left side, and as workbench 1 leveling as long as the feed screw nut 3 on right side is suitably reduced, perhaps suitably will being raise the left side feed screw nut, workbench 1 just can flatten.Because all feed screw nuts 3 all adopt the ball-screw nut of little helical pitch, so, make the Motion Resolution power of workbench 1 enough high.Each leading screw 2 by ceramic motor 32 its radial drive or by stepper motor, servomotor in its axial driving.Workbench 1 is pressed on the steel ball 9, steel ball 9 is pressed on the feed screw nut 3, like this, it between workbench 1 and the feed screw nut 3 a kind of relation that flexibly connects, each steel ball 9 can be used as the pivot of workbench 1, each leading screw 2 usefulness Fig. 7 structure makes leading screw 2 except that keeping the axle center rotation of leading screw energy wrapping wire thick stick, and other frees degree can not be arranged.Each leading screw 2 to measure the anglec of rotation of leading screw 2 in real time, is promptly measured the adjustable height of feed screw nut 3 axially being connected with an encoder 33.By regulating the anglec of rotation of each leading screw 2, make workbench 1 adjustment that in small angle range, can gesture.The bearing clearance mechanism 30 that disappears is eliminated bearing clearance, and ceramic motor 32 drives ceramic rings 31 and leading screw 2 rotations.
Junction at each feed screw nut 3 and workbench 1, install one workbench 1 and feed screw nut 3 be pulled in together spring 5 in opposite directions, spring 5 plays the effects that the steel ball 9 that makes on workbench 1 and the feed screw nut 3 reliably contacts, at this moment, the spring force of spring 5 has been equivalent to strengthen the weight of workbench 1.
Each leading screw 2 by ceramic motor 32 in its radial drive, or each leading screw 2 by stepper motor in its axial driving, drive leading screw 2 rotations, make feed screw nut 3 do upper and lower moving, thereby make workbench 1 also do upper and lower motion along leading screw 2.
Claims (4)
1. a vertical displacement mechanism is characterized in that, it is that four groups of axles are that vertical level is evenly distributed on the excircle of workbench (1) that 4 feed screw nuts (3) have been formed identical four groups of axles; There is lug (6) in the even branch of lower surface outer rim of workbench (1), and the end face of each lug (6) has a through hole (4), a groove (8); Have a through hole (7), a groove (10) on the end face of feed screw nut (3) one sides on the position relative with lug (6), the upper end of spring (5) is inserted in the through hole (4) on the lug (6), and hangs on the rope pin (28) by cord (29); The lower end of spring (5) is inserted in the through hole (7) on the feed screw nut (3), and hangs on the bayonet lock (30); Insert steel ball (9) in groove (8) on the lug (6) and the groove (10) on the feed screw nut (3); The center of each feed screw nut (3) screws in the leading screw (2) that is complementary with feed screw nut (3).
2. a kind of vertical displacement according to claim 1 mechanism is characterized in that the lower surface outer rim of workbench (1) is provided with and the corresponding lug of feed screw nut quantity (6).
3. a kind of vertical displacement according to claim 1 mechanism is characterized in that feed screw nut (3) is the ball-screw nut of little helical pitch.
4. a kind of vertical displacement according to claim 1 mechanism is characterized in that each leading screw (2) is ceramic motor (32) or stepper motor, the servomotor for axially driving of radial drive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201093821U CN201231421Y (en) | 2008-07-23 | 2008-07-23 | Vertical displacement mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201093821U CN201231421Y (en) | 2008-07-23 | 2008-07-23 | Vertical displacement mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201231421Y true CN201231421Y (en) | 2009-05-06 |
Family
ID=40617797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201093821U Expired - Fee Related CN201231421Y (en) | 2008-07-23 | 2008-07-23 | Vertical displacement mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201231421Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102873557A (en) * | 2012-09-11 | 2013-01-16 | 马鞍山动力传动机械有限责任公司 | Device for reducing bearing weight of slotting machine worktable |
| CN108000169A (en) * | 2017-12-08 | 2018-05-08 | 桐乡胜辉精密机械有限公司 | A kind of processing platform regulating device |
-
2008
- 2008-07-23 CN CNU2008201093821U patent/CN201231421Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102873557A (en) * | 2012-09-11 | 2013-01-16 | 马鞍山动力传动机械有限责任公司 | Device for reducing bearing weight of slotting machine worktable |
| CN102873557B (en) * | 2012-09-11 | 2015-05-20 | 马鞍山动力传动机械有限责任公司 | Device for reducing bearing weight of slotting machine worktable |
| CN108000169A (en) * | 2017-12-08 | 2018-05-08 | 桐乡胜辉精密机械有限公司 | A kind of processing platform regulating device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090506 Termination date: 20150723 |
|
| EXPY | Termination of patent right or utility model |