CN2837613Y - Screw and nut pair capable of safe caging - Google Patents
Screw and nut pair capable of safe caging Download PDFInfo
- Publication number
- CN2837613Y CN2837613Y CNU200520035212XU CN200520035212U CN2837613Y CN 2837613 Y CN2837613 Y CN 2837613Y CN U200520035212X U CNU200520035212X U CN U200520035212XU CN 200520035212 U CN200520035212 U CN 200520035212U CN 2837613 Y CN2837613 Y CN 2837613Y
- Authority
- CN
- China
- Prior art keywords
- nut
- screw mandrel
- cylinder
- key
- feather key
- 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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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
- F16H25/2015—Means specially adapted for stopping actuators in the end position; Position sensing means
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- Transmission Devices (AREA)
Abstract
But the utility model discloses the spacing screw mandrel of a kind of automatic safe, pair of nut.It comprises screw mandrel, the nut that matches with screw mandrel and is positioned at the outer cylinder of nut.Wherein have groove on the axial direction of nut, and be provided with in this groove and can move left and right can fluctuate again, the intermediate portion is cuboid, and left and right both sides are partly with the feather key on inclined-plane.Internal surface at cylinder is provided with fix stopper on the neutral position of bus simultaneously.In the counterbore at nut two ends, be provided with spring in addition.And wear on the aperture that hangs over feather key one of them termination of spring.This screw mandrel, nut structure are simple, and it is spacing not only reliably but also safety, and it can be widely used in power transmission, and displacement transmission and inconvenience are installed in the mechanism driving of limit switch.
Description
Affiliated technical field
The utility model relates to screw mandrel, the pair of nut in a kind of mechanical transmission, a kind of specifically can spacing safely screw mandrel, pair of nut.
Background technique
In the mechanical transmission of screw mandrel, pair of nut, usually require nut to stop in required specified location, used limit switch and automatic spacing device all can not reach the spacing protective function of automatic safe effectively reliably at present.Nut arrives qualifying bit postpone, and screw mandrel is rotated further and usually forces nut to move on, so can cause screw mandrel, nut transmission failure even cause device damage or other serious consequence.Therefore in existing screw mandrel, nut transmission, press for the spacing problem of automatic safe that solves them.
Summary of the invention
The purpose of this utility model is to overcome the prior art deficiency, and provides a kind of simple in structure, reliable operation, spacing property strong, can spacing screw mandrel, the pair of nut of automatic safe.
The purpose of this utility model reaches by following technical measures: this screw mandrel, pair of nut comprise screw mandrel, the nut that matches with screw mandrel and are positioned at the outer cylinder of nut.At first, have a groove in axial direction on the nut surface, and the feather key that can move left and right can fluctuate again is housed in this groove.Both ends of the surface at nut have the counterbore that concaves respectively simultaneously, and are respectively arranged with spring in these two counterbores, and wear respectively on the aperture that hangs over the feather key two ends these two springs termination separately.Secondly, the baffle ring that an energy and cylinder become one is housed respectively in the cylinder two ends, it is limited in neutral position in the cylinder with nut.On the inwall of cylinder, be provided with fix stopper simultaneously in the bus neutral position of cylinder.Its three, be respectively arranged with its external diameter fixedly back-up ring slightly littler than baffle ring internal diameter at two of screw mandrel.
The shape of feather key is that intermediate portion is the adjacent therebetween vertical flat surface in upper surface, lower surface and bi-side in the utility model, is cuboid.The left-hand component of intermediate portion and the upper surface of right-hand component then have along the inclined-plane of width of key direction, and the gradient direction that left-hand component and right-hand component are tilted is opposite.Be drilled with at the two ends of this feather key in addition and wear the aperture of hanging spring.
The utility model can also be on the nut surface have two grooves of symmetry mutually more in addition along axial direction, and the key bar that can move along axial direction is housed in these two grooves simultaneously.And the two ends of these two key bars respectively with set up outside the nut two ends, and be positioned at cylinder, be set on the key bar fixed plate Joint on the screw mandrel again.
The utility model has following advantage compared to existing technology: this screw mandrel, pair of nut are simple in structure, and it is spacing not only reliably but also safety.This technology can be widely used in power transmission, displacement transmission and inconvenience and install in the mechanical transmission of limit switch.
Description of drawings
Fig. 1 is a structural drawing of the present utility model
Fig. 2 is an A-A sectional view among Fig. 1.
Fig. 3 is the structural drawing of feather key.
Fig. 4 is the left view of Fig. 3.
Fig. 5 is the plan view of Fig. 3.
Embodiment
The utility model is described in further detail below in conjunction with embodiment and accompanying drawing: the spacing screw mandrel of this safety, pair of nut be by screw mandrel 1, the nut 3 that matches with screw mandrel 1, and be positioned at nut 3 outer cylinders 9 and form.Wherein in axial direction have a groove on nut 3 surfaces.And in this groove, the intermediate portion is housed and is cuboid, the upper surface of left-hand component then has sweptback inclined-plane, and the upper surface of right-hand component then has the feather key that the inclined-plane constituted 7 that turns forward.This feather key 7 can move left and right can fluctuate again in its groove.Also have two grooves of symmetry mutually on nut 3 surfaces in addition along axial direction simultaneously.And the key bar 5 that can move along axial direction is housed in these two grooves.The left end of these two key bars 5 be arranged on outside nut 3 left ends, and be positioned at cylinder 9, the left side key bar fixed plate 4 that is set on again on the screw mandrel 1 fixes; Its right-hand member be arranged on outside nut 3 right-hand members, and be positioned at cylinder 9, the right side key bar fixed plate 4 that is set on again on the screw mandrel 1 fixes.Both ends of the surface at nut 3 have the counterbore that concaves respectively, and are respectively arranged with spring 8 in these two counterbores.And this two springs 8 termination separately is to wear respectively on the aperture that hangs over feather key 7 two ends.And the baffle ring 2 that becomes one with cylinder 9 is housed in cylinder 9 two ends, it is limited in axis neutral position in the cylinder 9 with nut.In addition on the inwall of cylinder 9, be provided with in the neutral position of cylinder 9 buses can block inclined-plane in the feather key 7 back to the fix stopper 6 of flat surface.Last its external diameter fixedly back-up ring 10 slightly littler that be respectively arranged with at two of screw mandrel 1 than baffle ring 2 internal diameters.
This screw mandrel, when pair of nut work begins, on the screw mandrel about two fixedly back-up ring all away from nut.Being contained in the fix stopper that a side of the intermediate portion of the feather key on the nut is fixed on the cylinder simultaneously blocks.The rotation in a single day of screw mandrel this moment, the nut on the screw mandrel is dead by the retaining of the fix stopper on the cylinder by feather key intermediate portion thereon, and nut can not be rotated, and can only produce axial displacement on screw mandrel.When nut move to screw mandrel on the left side fixedly back-up ring contacts the time, fixedly back-up ring will be by the key bar fixed plate pressure spring on the left side, promote feather key simultaneously and move right, make the intermediate portion of feather key leave fix stopper, and the inclined-plane of the left-hand component of feather key is contacted with fix stopper.If this moment, screw mandrel was rotated further, then fixedly the contact pressure between back-up ring, left side key bar fixed plate, screw mandrel and the nut left side etc. and the frictional force that produces will drive nut and rotate on the left side, so the inclined-plane of the left-hand component of feather key can slip over along the bottom of fix stopper, force whole feather key to float simultaneously downwards.After feather key was crossed fix stopper, whole feather key was under the effect of spring, and the end face that makes feather key that can upwards reset automatically again contacts with cylinder inner surface.Also will by original direction be rotated further as screw mandrel this moment, and then nut will not have obstacle ground to rotate synchronously with screw mandrel in cylinder, thereby realize the purpose that its safety is spacing.When screw mandrel reverses, may together reverse with screw mandrel when nut is initial.When in the feather key left-hand component with the inclined-plane back to flat surface with after fix stopper contacts, will stop nut to be rotated further, and make nut recover opposite straight-line displacement.The fixedly back-up ring on the left side separates with the key bar fixed plate on the left side on the screw mandrel simultaneously, and feather key also resets to the neutral position.Thereafter kinematic relation process and aforementioned identical, just moving direction difference.
Claims (3)
1. one kind can comprise screw mandrel (1), the nut (3) that matches with screw mandrel (1) by spacing safely screw mandrel, pair of nut, with the cylinder (9) that is positioned at outside the nut (3), it is characterized in that at first having a groove in axial direction on nut (3) surface, and the feather key (7) that can move left and right can fluctuate again is housed in this groove, both ends of the surface at nut (3) have the counterbore that concaves respectively simultaneously, and be respectively arranged with spring (8) in these two counterbores, and wear respectively on the aperture that hangs over feather key (7) two ends this two springs (8) termination separately; Secondly, the baffle ring (2) that an energy and cylinder (9) become one is housed respectively in cylinder (9) two ends, it is limited in the interior neutral position of cylinder (9) with nut (3), on the inwall of cylinder (9), is provided with fix stopper (6) in the bus neutral position of cylinder (9) simultaneously; Its three, be respectively arranged with its external diameter fixedly back-up ring (10) slightly littler than baffle ring (2) internal diameter at two of screw mandrel (1).
2. according to claim 1 can spacing safely screw mandrel, pair of nut, the shape that it is characterized in that feather key (7) is that intermediate portion is the adjacent therebetween vertical flat surface in upper surface, lower surface and bi-side, be cuboid, the left-hand component of intermediate portion and the upper surface of right-hand component then have along the inclined-plane of width of key direction, and the gradient direction that left-hand component and right-hand component are tilted is opposite, is drilled with at the two ends of this feather key (7) in addition to wear the aperture of hanging spring (8).
3. according to claim 1 and 2 can spacing safely screw mandrel, pair of nut, it is characterized in that having two grooves of symmetry mutually in addition along axial direction on nut (3) surface, and the key bar (5) that can move along axial direction is housed in these two grooves simultaneously, and the two ends of these two key bars (5) respectively with set up outside nut (3) two ends, and be positioned at cylinder (9), be set on key bar fixed plate (4) Joint on the screw mandrel (1) again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200520035212XU CN2837613Y (en) | 2005-08-22 | 2005-08-22 | Screw and nut pair capable of safe caging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200520035212XU CN2837613Y (en) | 2005-08-22 | 2005-08-22 | Screw and nut pair capable of safe caging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2837613Y true CN2837613Y (en) | 2006-11-15 |
Family
ID=37392098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200520035212XU Expired - Fee Related CN2837613Y (en) | 2005-08-22 | 2005-08-22 | Screw and nut pair capable of safe caging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2837613Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102235474A (en) * | 2010-03-04 | 2011-11-09 | 文卡德埃尔赛弗公司 | Motor mechanism |
| CN102312970A (en) * | 2010-07-06 | 2012-01-11 | 第一传动科技股份有限公司 | Linear actuator and safety trip thereof |
| CN102889352A (en) * | 2012-10-15 | 2013-01-23 | 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 |
| CN104028370A (en) * | 2014-06-18 | 2014-09-10 | 江西稀有金属钨业控股集团有限公司 | Permanent magnetic roller, permanent magnetic roller surface magnetic field intensity adjusting method and material sorting method using permanent magnetic roller |
| CN105772591A (en) * | 2016-05-03 | 2016-07-20 | 芜湖飞驰汽车零部件技术有限公司 | Rim rolling positioning device |
-
2005
- 2005-08-22 CN CNU200520035212XU patent/CN2837613Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102235474A (en) * | 2010-03-04 | 2011-11-09 | 文卡德埃尔赛弗公司 | Motor mechanism |
| CN102235474B (en) * | 2010-03-04 | 2015-11-25 | 文卡德埃尔赛弗公司 | Motor mechanism |
| CN102312970A (en) * | 2010-07-06 | 2012-01-11 | 第一传动科技股份有限公司 | Linear actuator and safety trip thereof |
| CN102312970B (en) * | 2010-07-06 | 2013-08-07 | 第一传动科技股份有限公司 | Linear actuator and safety trip thereof |
| CN102889352A (en) * | 2012-10-15 | 2013-01-23 | 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 |
| 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 |
| CN104028370A (en) * | 2014-06-18 | 2014-09-10 | 江西稀有金属钨业控股集团有限公司 | Permanent magnetic roller, permanent magnetic roller surface magnetic field intensity adjusting method and material sorting method using permanent magnetic roller |
| CN104028370B (en) * | 2014-06-18 | 2017-02-15 | 江西稀有金属钨业控股集团有限公司 | Permanent magnetic roller, permanent magnetic roller surface magnetic field intensity adjusting method and material sorting method using permanent magnetic roller |
| CN105772591A (en) * | 2016-05-03 | 2016-07-20 | 芜湖飞驰汽车零部件技术有限公司 | Rim rolling positioning device |
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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 |