CN2168992Y - Rack transmission with fast-slow speed - Google Patents
Rack transmission with fast-slow speed Download PDFInfo
- Publication number
- CN2168992Y CN2168992Y CN 93210068 CN93210068U CN2168992Y CN 2168992 Y CN2168992 Y CN 2168992Y CN 93210068 CN93210068 CN 93210068 CN 93210068 U CN93210068 U CN 93210068U CN 2168992 Y CN2168992 Y CN 2168992Y
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- China
- Prior art keywords
- nut
- lifting
- drive mechanism
- supporting base
- latch
- 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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- 230000005540 biological transmission Effects 0.000 title abstract description 5
- 230000000694 effects Effects 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 230000007935 neutral effect Effects 0.000 claims description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract 3
- 230000002349 favourable effect Effects 0.000 abstract 1
- 230000033001 locomotion Effects 0.000 description 3
- 230000003028 elevating effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model relates to a fast and slow screw rod transmission mechanism which is composed of a supporting seat, a half nut, a lifting sleeve, a screw rod and a locking mechanism. The utility model is characterized in that the side of the external surface of the half nut is provided with a guide face having the action of guide; the lower part and the upper part of the half nut are provided with cam lift curved faces which are respectively used for controlling the engagement and disengagement of the half nut and the screw rod. The utility model is easy to manufacture, the precision is easy to control, and is favorable to increase the manufacture efficiency and to reduce the manufacture cost.
Description
The present invention relates to a kind of screw driving mechanism, in the feeding transmission system between flat tongs, tailstock tool and the lathe working slider kinematic pair that is specially adapted to use on hand bench vice, the lathe, and all need on the device of fast moving with the threaded piece transmission.
The applicant is CN91201540.3 in China Patent No., name is called and " discloses a kind of screw driving mechanism in the patent application document of automatically opened or closed screw mechanism with lift nut; this mechanism adopts half-nut to do upper and lower elevating movement with respect to screw mandrel; make nut realize engagement fast and separate the screw thread of screw mandrel, crossed idle stroke, rapid adjustment fast apart from, the purpose of increasing work efficiency to reach.The elevator mechanism that is proposed in this application file is the lifting cover, the left end inner curve of this cover cam of forming the upper and lower lifting of control half-nut that matches with the half-nut cylindrical is paid, " cam contour surface " that wherein play the driving link effect is arranged on lifting cover inboard, the cusp that plays the driven member effect is arranged on half-nut Wai Yuan bottom, this Design and Machining cost height, complex structure.Also there is complex structure in the locking framework of being mentioned in this application file in addition, problems such as poor reliability.
The present invention is directed to the problems referred to above and improve, purpose is to provide a kind of quick and slow speed screw driving system of simple in structure, easy processing.
The present invention as shown in the figure, by supporting base 1, half-nut 2, lifting cover 3, screw rod 4, locking framework 5 is formed, wherein supporting base 1 is provided with bearing hole 11 for two ends, there is side plate 12 both sides, 13 frame shape, half-nut 2 endoporus have the internal thread that is not more than half cycle, 3 right-hand member endoporus are overlapped in lifting pawl device, left end is the lifting board 31 that acts on mutually with half-nut 1 cylindrical, half-nut 2, lifting cover 3 is arranged in the supporting base 1, screw rod 4 passes the bearing hole 11 of supporting base 1 and the half-nut 2 in the pedestal, thereby lifting cover 3 becomes an integral body, characteristics of the present invention are that the outer surface of half-nut is provided with the guide surface 21 that play the guiding role except that the side, outside 24, its guide surface 24 also has cam lift curved surface 22 to the bottom, the lifting board 31 interior acting surfaces 32 that act on mutually with outer nut 2 outer surfaces are a plane.When the present invention works, half-nut 2 is by the upper and lower lifting position of 22 controls of the cam lift curved surface on self outer surface, realize that half-nut internal thread and screw rod mesh fast, this structure half-nut had both played the effect of cam driving wheel, itself be again the displacement driven member, finish the rotational motion of cam structure so compact and ingenious structure by lifting cover 3, and half-nut, lifting cover easy processing, thereby realize purpose of the present invention.
When the lifting board 31 of screw rod 4 counter-rotating drive lifting covers 3 withdraws from half-nut 2 bottoms, in order to ensure half-nut fall with screw rod 4 on screw thread break away from, the guide surface 24 of half-nut 2 outer surfaces also is provided with cam lift curved surface 23 to the top, like this in the position process is taken back in the lifting board 31 counter-rotating arrival upper end portions of lifting cover 3 (as shown in Figure 3), by the interaction of the interior acting surface on the lifting board 31 32 with the cam lift curved surface 23 of half-nut 2, force half-nut 2 to bottom offset, screw thread is thrown off.The counter-rotating of lifting board 31 is spacing to be realized that by supporting base 1 side plate 12 tops the spacing boss 14 by supporting base 1 intracavity bottom of its forward rotation is realized.The cam lift curved surface 22 that is positioned at the outer surface hypomere of lifting cover 3 is generally made an appointment with neutral position formation effect cusp 221 in the bottom, so that the load center of gravity drops on the symmetrical center line.
After making the thread engagement on half-nut 2 and the screw rod 4, can pin certainly, the outer surface of the lifting board 31 of lifting cover 3 can be made circular arc 33 or a facet concentric with screw rod 4, during thread engagement, the symmetric points of this circular arc 33 or plane are just in time filled up the bottom of half-nut 2 or are crossed the position slightly, like this, lifting board 31 can not skid off half-nut 2 bottoms when stressed, and therefore stability preferably arranged.
Locking framework 5 of the present invention as shown in Figure 4, be made up of latch 51, spring 52, spring seat 53, eccentric handle 55, wherein latch 51 front ends are latch point 511, and the centre is provided with directional post 512, spring 52 is contained in the spring seat 53, and eccentric handle 55 is hinged by pin 54 and latch 51 tail ends.Locking framework 5 is arranged on the position of the corresponding lifting cover in supporting base 1 side, lifting cover 3 locking apertures 34 that are provided with corresponding to latch point 511, and when the lifting board 31 of lifting cover 3 was in half-nut 2 bottoms, locking aperture 34 was aimed at latch point 511.The working principle of above-mentioned locking framework 5 is as follows: when wish the slow-motion of screw rod tool, when moving back function slowly, eccentric handle 55 is transferred to arrow horizontal position (as shown in Figure 4), at this moment eccentric handle 55 is in minor axis location (bottom surface 552 that is eccentric handle 55 contacts with spring seat 53 front-end faces 531), latch 51 inserts in the locking aperture 34, lifting cover 3 is fixed on the position that embeds half-nut 2 bottoms, make half-nut 2 always remain on engagement, the function that screw mechanism is kept original slow-motion, moves back slowly; When wishing the F.F. of screw rod tool, rewind down function, eccentric handle 55 is transferred to the arrow vertical position, at this moment eccentric handle 55 is in major axis position (side 551 that is eccentric handle 55 contacts with spring seat 53 front-end faces 531), latch point 511 withdraws from the locking aperture 34 of lifting cover 3, lifting cover 3 is rotatable, drive half-nut 2 upper and lower liftings, screw mechanism can be realized the function of rapid adjustment distance.
The present invention is because the lift face of the upper and lower elevating movement of control half-nut is arranged on the half-nut outer surface, and therefore, half-nut, lifting cover easy processing, precision are controlled easily, and processing cost reduces.Compact structure of the present invention is reasonable, simple in structure, be easy to processing, help improving work efficiency, reduce fabricating cost.
Claims (6)
1, a kind of fast, screw drive mechanism at a slow speed, by supporting base 1, half-nut 2, lifting cover 3, screw rod 4, locking framework 5 is formed, wherein supporting base 1 is provided with bearing hole 11 for two ends, there is side plate 12 both sides, 13 frame shape, half-nut 2 endoporus have the internal thread that is not more than half cycle, 3 right-hand member endoporus are overlapped in lifting pawl device, left end is the lifting board 31 that acts on mutually with half-nut 1 cylindrical, half-nut 2, lifting cover 3 is arranged in the supporting base 1, screw rod 4 passes the bearing hole 11 of supporting base 1 and the half-nut 2 in the pedestal, thereby lifting cover 3 becomes an integral body, the outer surface that it is characterized in that described half-nut removes side and is provided with the guide surface 21 that play the guiding role, outside 24, its guide surface 24 also has cam lift curved surface 22 to the bottom, the lifting board 31 interior acting surfaces 32 that act on mutually with outer nut 2 outer surfaces are a plane.
2, screw drive mechanism according to claim 1 is characterized in that the guide surface 24 of above-mentioned half-nut 2 outer surfaces is provided with cam lift curved surface 23 to the top.
3, screw drive mechanism according to claim 1 is characterized in that above-mentioned lifting board 31 outer surfaces are circular arc 33 or a facet concentric with screw rod 4.
4, screw drive mechanism according to claim 1, the cam lift curved surface 22 that it is characterized in that above-mentioned half-nut 2 outer surfaces is at neutral position, bottom formation effect cusp 221.
5, screw drive mechanism according to claim 1, it is characterized in that above-mentioned locking framework 5 is made up of latch 51, spring 52, spring seat 53, eccentric handle 55, wherein latch 51 front ends are latch point 511, the centre is provided with directional post 512, spring 52 is contained in the spring seat 53, and eccentric handle 55 is hinged by pin 54 and latch 51 tail ends.
6, screw drive mechanism according to claim 5, it is characterized in that above-mentioned locking framework 5 is arranged on the position of the corresponding lifting cover in supporting base 1 side, lifting cover 3 locking apertures 34 that are provided with corresponding to latch point 511, when the lifting board 31 of lifting cover 3 was in half-nut 2 bottoms, locking aperture 34 was aimed at latch point 511.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93210068 CN2168992Y (en) | 1993-04-23 | 1993-04-23 | Rack transmission with fast-slow speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93210068 CN2168992Y (en) | 1993-04-23 | 1993-04-23 | Rack transmission with fast-slow speed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2168992Y true CN2168992Y (en) | 1994-06-15 |
Family
ID=33792075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93210068 Expired - Fee Related CN2168992Y (en) | 1993-04-23 | 1993-04-23 | Rack transmission with fast-slow speed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2168992Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1918405B (en) * | 2004-02-16 | 2010-05-05 | 必佳乐有限公司 | Apparatus for converting rotary motion into reverse and forward motion |
-
1993
- 1993-04-23 CN CN 93210068 patent/CN2168992Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1918405B (en) * | 2004-02-16 | 2010-05-05 | 必佳乐有限公司 | Apparatus for converting rotary motion into reverse and forward motion |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |