CN2900934Y - Nut structure for linear driving device - Google Patents
Nut structure for linear driving device Download PDFInfo
- Publication number
- CN2900934Y CN2900934Y CN 200620004157 CN200620004157U CN2900934Y CN 2900934 Y CN2900934 Y CN 2900934Y CN 200620004157 CN200620004157 CN 200620004157 CN 200620004157 U CN200620004157 U CN 200620004157U CN 2900934 Y CN2900934 Y CN 2900934Y
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- CN
- China
- Prior art keywords
- nut
- putting chamber
- safety
- cylindrical shell
- cap nut
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- Expired - Lifetime
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Abstract
Disclosed is a cap nut structure for linearly actuating device which is used for connecting a screwed jointing with the driving screw, which comprises a main cap nut, a safety cap nut, an elastic body and a spacing unit. The cap nut structure is characterized in that the main cap nut is made from plastic materials, the internal thread and the forming in slope of thread chamber are provided in the cap nut structure, the safety cap nut and the elastic body are provided in the chamber, the internal thread is equipped in the safety cap nut which can axially move with the main cap nut, the corresponding end face of the safety cap nut and the main cap nut are respectively supported in the ends of the elastic body, further, a spacing unit is fixedly connected with one side of the main cap nut chamber for spacing the main cap nut successive range in the chamber, thereby when frictional dissipation is produced between the main cap nut and the driving screw, the high safety of cap nut structure usage can be assured.
Description
Technical field
The utility model relates to a kind of nut structure that is used for linear actuator, refers in particular to a kind of Safety nut structure that is installed in linear actuator.
Background technique
Linear actuator utilizes driven units such as motor and worm and worm gear group, order about affixed telescopic pipe thereon simultaneously to drive the driving screw rotation, carry out the linear action of stretching out or withdrawing, therefore be widely used in the elevator mechanism of sick bed, or in the field domain of other running of need stretching, contract.And the driving screw of general linear actuator, the nut that has been threaded at its external screw thread place, the end at nut is connected with telescopic pipe again, however for reducing its friction noise and friction ractor to each other, this nut is made by plastic material; Yet, because driving screw is all made with metal material, so under long engagement driving, make this nut produce friction consume phenomenon unavoidably, thereby can't bear the function of original bearing load, more cause this linear actuator can't continue to use, make telescopic pipe moment sinking, cause the generation of hazard event even also have because of this nut can't bear load.
Known linear actuator has driving screw, along the nut structure of axially making linear displacement of driving screw and be fixed in the telescopic pipe of nut structure.The nut structure that is used for this linear actuator mainly comprises main nut, be located at pull pad between the end face of main nut and Safety nut of the Safety nut of main nut one side and folder, and on side of main nut and Safety nut, be respectively equipped with shrinkage pool and perforation, and on the surface of contact of pad and main nut, Safety nut, convex with locating column respectively.So, to constitute the nut security mechanism of linear actuator.
Yet, the known nut structure that is used for linear actuator, under using, reality still has following problem points, owing to contact for attaching mutually between this Safety nut and pad, main nut, and Safety nut equates with the internal screw thread pitch of main nut, when the internal screw thread friction consume of main nut, to between the internal screw thread of the external screw thread of driving screw and main nut, be formed with more and more big gap, and the internal screw thread of Safety nut is difficult for abrasion, therefore will make driving screw and nut structure produce stuck phenomenon in transmission process; In addition, be located at the effect that locating column on the pad is subjected to shearing stress for a long time, each locating column and pad or main nut produced break away to link, and then cause this nut structure to completely lose its protective action.
So, the design people puts and is engaged in research and development experience for many years in view of the above problems, and at inconvenience that can improve and problem points, concentrate on studies and cooperate actual utilization, and, propose a kind of reasonable in design and effectively improve the nut structure that is used for linear actuator of the problems referred to above point in line with excelsior spirit.
The model utility content
In order to solve above-mentioned existing issue, an aspect of the present utility model provides a kind of nut structure that is used for linear actuator, this linear actuator has driving screw and along the nut structure of axially making linear displacement of driving screw, this nut structure comprises main nut, Safety nut, elastomer and bounding means, wherein, this main nut is made by plastic material, the putting chamber that this main nut inside has the internal screw thread that is threaded mutually with driving screw and is formed at internal screw thread one side, in this putting chamber, dispose Safety nut and elastomer, this Safety nut also has the internal screw thread that is threaded mutually with driving screw, and it can move axially with respect to main nut, these elastomeric two ends respectively contact on the corresponding end face of main nut and Safety nut, putting chamber one side at main nut is connected with bounding means in addition, in order to the moving range of restriction Safety nut in putting chamber.
Of the present utility modelly be to provide a kind of nut structure on the other hand, this nut structure is threaded mutually with driving screw, and it comprises main nut, Safety nut, elastomer and bounding means, it is characterized in that described main nut is made by plastic material, portion has internal screw thread and is formed at the putting chamber of internal screw thread one side within it, in this putting chamber, dispose Safety nut and elastomer, this Safety nut also has internal screw thread, and it can move axially with respect to main nut, and these elastomeric two ends respectively contact on the corresponding end face of main nut and Safety nut, putting chamber one side at main nut is connected with bounding means in addition, in order to the moving range of restriction Safety nut in putting chamber.
The utility model is used for the nut structure of linear actuator, and it can carry the load of main nut consume by Safety nut, when producing the friction consume between main nut and driving screw, still can guarantee the tight security of its use.
Description of drawings
Fig. 1 is a three-dimensional exploded view of the present utility model;
Fig. 2 is a combination schematic representation of the present utility model;
Fig. 3 is an assembled sectional view of the present utility model;
Fig. 4 is the assembled sectional view that the utility model is applied to linear actuator;
Fig. 5 is the user mode figure of the utility model and driving screw.
In the accompanying drawing, the list of parts of each label representative is as follows:
Groove 15 external screw threads 16
Space 31, interval
Bounding means 40
Linear actuator 5
Motor 51 worm screws 511
Fixed base 52 driving screws 53
Worm gear 531 telescopic pipes 54
Embodiment
Relevant feature of the present utility model and technology contents see also following detailed description and accompanying drawing, and accompanying drawing only provides reference and explanation, is not to be used for the utility model is limited.
See also Fig. 1, Fig. 2 and shown in Figure 3, be respectively three-dimensional exploded view of the present utility model, combination schematic representation and assembled sectional view.The utility model provides a kind of nut structure that is used for linear actuator, and this nut structure 1 mainly comprises main nut 10, Safety nut 20, elastomer 30 and limiting board 40, wherein:
This main nut 10 is made by plastic material, having cylindrical shell 11 reaches from the outward extending convex section 12 of an end of cylindrical shell 11, the inside of this cylindrical shell 11 of a left side is formed with a putting chamber 13, and outside putting chamber 13 close side direction of convex section 12, protruded out location circular shaft 14, between the internal face of outer periphery face of locating circular shaft 14 and cylindrical shell 11, be formed with annular groove 15.Outer peripheral edge shaping surface at convex section 12 has external screw thread 16 in addition, and is inner then have the internal screw thread 17 that connects location circular shaft 14.In addition, in the outside of putting chamber 13 and be positioned at and offer a plurality of slots 18 on the cylindrical shell 11.
This Safety nut 20 can be made by metallic material, is configured in the putting chamber 13 of main nut 10, and can moves axially with respect to main nut 10, and the center of this Safety nut 20 of a left side also has internal screw thread 21.
This elastomer 30 can be a helical spring, it also is arranged in the putting chamber 13 of main nut 10, this elastomer 30 is socketed on the outside of location circular shaft 14 and is located in the groove 15, the biend of this elastomer 30 respectively contact on the corresponding end face of main nut 10 and Safety nut 20, and make and be formed with a space 31 at interval between the end face of Safety nut 20 and location circular shaft 14, with avoid because of the internal screw thread 17,21 of main nut 10 and Safety nut 20 do not wait abrasion, with the effectively anti-dead phenomenon of fabrication.
This bounding means 40 can be an annular slab, has outwards protruded out a plurality of positioning blocks 41 at the periphery of this annular slab, and this positioning block 41 cooperates with slot 18 relative set of main nut 10, in order to the moving range of restriction Safety nut 20 in the putting chamber 13 of main nut 10.
See also Fig. 4 and shown in Figure 5, be respectively the utility model be applied to linear actuator assembled sectional view and with the user mode figure of driving screw.Nut structure 1 of the present utility model can be applicable on the linear actuator 5, this linear actuator 5 comprises motor 51, fixed base 52, driving screw 53 and telescopic pipe 54, wherein motor 51 is fixed in the bottom side of fixed base 52, and be connected with a worm screw 511 that is inserted into fixed base 52 inside at place, the axle center of motor 51, be provided with by the made driving screw 53 of metallic material in the inside of fixed base 52 and perpendicular to the direction of worm screw 511 in addition, and be connected with the worm gear 531 of the transmission that is meshed with aforementioned worm screw 511 at an end of driving screw 53.Nut structure 1 of the present utility model is threaded on the driving screw 53, and can be along driving screw 53 axially make linear displacement.The external screw thread 16 of main in addition nut 10 is solidly connected with an end spiral shell of telescopic pipe 54.
During use, when ordering about worm screw 511, motor 51 rotates, worm gear 531 reaches and driving screw 53 rotations of worm gear 531 Joints with driving, after driving screw 53 begins rotation, with the main nut 10 and the Safety nut 20 of while drive nut structure 1, and make telescopic pipe 54 do to stretch out or the action of retraction with respect to fixed base 52.When between driving screw 53 and main nut 10 and Safety nut 20, making engagement driving, since the biend of elastomer 30 respectively contact between the corresponding end face of main nut 10 and Safety nut 20, the frictional damping that is produced between end face by elastomer 30 and main nut 10 and Safety nut 20, when the internal screw thread 17 of main nut 10 produces wearing and tearing, make Safety nut 20 can adjust the relative angle or the position of 53 of itself and driving screws automatically, and unlikelyly cause phenomenons such as stuck.
Yet, the above only is a preferable possible embodiments of the present utility model, be not so limit claim of the present utility model, the equivalent structure that all utilization the utility model specifications and accompanying drawing content are carried out changes, or directly or indirectly apply to other relevant technical field, all in like manner all be contained in the scope that the utility model contains.
Claims (11)
1. nut structure that is used for linear actuator, described linear actuator have driving screw and along the nut structure of axially making linear displacement of driving screw, it is characterized in that described nut structure comprises:
Main nut, made by plastic material, described main nut inside has the internal screw thread that is threaded mutually with described driving screw and is formed at the putting chamber of described internal screw thread one side;
Safety nut is configured in the putting chamber of described main nut, and described Safety nut also has the internal screw thread that is threaded mutually with described driving screw, and it can move axially with respect to described main nut;
Elastomer is arranged in the putting chamber of described main nut, described elastomeric two ends respectively contact on the corresponding end face of described main nut and Safety nut; And
Bounding means is fixed in putting chamber one side of described main nut, limits the moving range of described Safety nut in putting chamber.
2. the nut structure that is used for linear actuator as claimed in claim 1 is characterized in that described main nut has cylindrical shell and from the outward extending convex section of an end of described cylindrical shell, described putting chamber is formed at the inside of described cylindrical shell.
3. the nut structure that is used for linear actuator as claimed in claim 2, it is characterized in that in described putting chamber and near outside the side direction of convex section, having protruded out the location circular shaft, and between the internal face of the outer periphery of described location circular shaft and described cylindrical shell, being formed with groove, described location circular shaft and groove be the ccontaining described elastomer of socket respectively.
4. the nut structure that is used for linear actuator as claimed in claim 3 is characterized in that being formed with space at interval between the corresponding end face of described location circular shaft and Safety nut.
5. the nut structure that is used for linear actuator as claimed in claim 2, wherein in the outside of described putting chamber and be positioned at and offer a plurality of slots on the described cylindrical shell, described in addition bounding means is an annular slab, outwards protrudes out positioning block with the corresponding grafting of described slot at its periphery.
6. the nut structure that is used for linear actuator as claimed in claim 1 is characterized in that described elastomer is a helical spring.
7. a nut structure is characterized in that, comprising:
Main nut, made by plastic material, described main nut inside has internal screw thread and is formed at the putting chamber of described internal screw thread one side;
Safety nut is configured in the putting chamber of described main nut, and described Safety nut also has internal screw thread, and it can move axially with respect to described main nut;
Elastomer is arranged in the putting chamber of described main nut, described elastomeric two ends respectively contact on the corresponding end face of described main nut and Safety nut; And
Bounding means is fixed in putting chamber one side of described main nut, limits the moving range of described Safety nut in putting chamber.
8. nut structure as claimed in claim 7 is characterized in that described main nut has cylindrical shell and from the outward extending convex section of an end of described cylindrical shell, described putting chamber is formed at the inside of described cylindrical shell.
9. nut structure as claimed in claim 8, it is characterized in that, in described putting chamber and near outside the side direction of convex section, protruded out the location circular shaft, and between the internal face of the outer periphery of described location circular shaft and described cylindrical shell, being formed with groove, described location circular shaft and groove be the ccontaining described elastomer of socket respectively.
10. nut structure as claimed in claim 9 is characterized in that being formed with space at interval between the corresponding end face of described location circular shaft and Safety nut.
11. nut structure as claimed in claim 7 is characterized in that described elastomer is a helical spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620004157 CN2900934Y (en) | 2006-03-03 | 2006-03-03 | Nut structure for linear driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620004157 CN2900934Y (en) | 2006-03-03 | 2006-03-03 | Nut structure for linear driving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2900934Y true CN2900934Y (en) | 2007-05-16 |
Family
ID=38085097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620004157 Expired - Lifetime CN2900934Y (en) | 2006-03-03 | 2006-03-03 | Nut structure for linear driving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2900934Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103551863A (en) * | 2013-10-31 | 2014-02-05 | 无锡华联精工机械有限公司 | Anti-skid structure of movable roller carrier screw nut |
| CN107285247A (en) * | 2017-08-23 | 2017-10-24 | 上海联影医疗科技有限公司 | Lowering or hoisting gear and C arm machine |
-
2006
- 2006-03-03 CN CN 200620004157 patent/CN2900934Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103551863A (en) * | 2013-10-31 | 2014-02-05 | 无锡华联精工机械有限公司 | Anti-skid structure of movable roller carrier screw nut |
| CN107285247A (en) * | 2017-08-23 | 2017-10-24 | 上海联影医疗科技有限公司 | Lowering or hoisting gear and C arm machine |
| US10717635B2 (en) | 2017-08-23 | 2020-07-21 | Shanghai United Imaging Healthcare Co., Ltd. | Anti-fall mechanism for lifting equipment |
| US11247882B2 (en) | 2017-08-23 | 2022-02-15 | Shanghai United Imaging Healthcare Co., Ltd. | Anti-fall mechanism for lifting equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070516 |
|
| EXPY | Termination of patent right or utility model |