SU636439A1 - Screw-nut hydrostatic transmission - Google Patents
Screw-nut hydrostatic transmissionInfo
- Publication number
- SU636439A1 SU636439A1 SU731906453A SU1906453A SU636439A1 SU 636439 A1 SU636439 A1 SU 636439A1 SU 731906453 A SU731906453 A SU 731906453A SU 1906453 A SU1906453 A SU 1906453A SU 636439 A1 SU636439 A1 SU 636439A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- nut
- screw
- centering
- hydrostatic transmission
- pockets
- Prior art date
Links
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
- F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Description
Изобретение относитс к машиностроению и может быть использовано Б станкостроении, например в прецизионных металлорежущих станках. Известны гидростатические передачи винт-гайка, в которых, с целью центрировани гайки относительно вин та, использованы центрирующие втулки l, центрирующие карманы или же центрирование гайки относительно вин та обеспечиваетс при монтаже. Наиболее близким решением к данно му изобретению из известных вл етс передача винт-гайка, содержаща винт охваченный гайкой с центрирующими и несущими карманами, и дроссели сопротивлени на входе в карманы 2j. Недостатком указанной передачи вл етс наличие момента от действи радиальных составл ющих сил давлени рабочей среды, поворачивающего гайку относительно винта в осевой плоскости . Этот поворот нарушает равномерность дросселирующих зазоров между радиальными и боковыми поверхност ми профил резьбы винта и гайки и тем самьлм снижает несущую способность пе редачи и может, привести даже к метал лическому контакту между элементами резьбы винта и гайки. Целью изобретени вл етс улучшение условий гидростатического центрировани гайки относительно винта. Достигаетс эта цель тем, что на гайке выполнен участок без гидростатических карманов длиной в 0,5 витка винтовой линии резьбы, раздел ющий винтовую линию гайки с центрирующими и несущими карманами на две части с одинаковым и целым числом витков, при этом участок без гидростатических карманов соединен со сливом. Такое выполнение передачи винт-гайка обеспечивает исключение суммарного момента от действи радиальных составл ющих сил давлени рабочей среды , так как векторы моментов на част х передачи с центрирующими и несущими карманами, разделенных участком, в 0,5 витка винтовой линии без гидростатических карманов, взаимно противоположны . На фиг. 1 изображена предлагаема передача, продольный разрез; на фиг. 2 - то же, поперечный разрез; на фиг. 3 - усредненна эпюра радиальных составл ющих сил давлени рабочей среды. Передача содержит винт 1 и гайку 2. На гайке выполнены центрирующиеThe invention relates to mechanical engineering and can be used in machine tool industry, for example, in precision machine tools. Hydrostatic screw-nut gears are known in which, in order to center the nut relative to the screw, centering sleeves l, centering pockets or the centering of the nut relative to the screw are provided during installation. The closest solution to this invention known is the screw-nut transfer, which contains a screw covered by a nut with centering and supporting pockets, and resistance chokes at the entrance to the pockets 2j. The disadvantage of this transmission is the presence of torque from the action of radial component forces of the working medium pressure, turning the nut relative to the screw in the axial plane. This rotation violates the uniformity of the throttling gaps between the radial and lateral surfaces of the screw and nut thread profile, and thus reduces the bearing capacity of the gear and may even lead to metallic contact between the screw and nut thread elements. The aim of the invention is to improve the conditions of hydrostatic centering of the nut relative to the screw. This goal is achieved by the fact that the nut has a section without hydrostatic pockets with a length of 0.5 turns of the thread helix, which separates the nut helix with centering and carrying pockets into two parts with the same and a whole number of turns, while the section without hydrostatic pockets is connected with a sink. Such an implementation of the screw-nut transmission ensures the elimination of the total moment from the action of the radial component forces of the working medium pressure, since the moment vectors on the transmission parts with centering and bearing pockets separated by a section of 0.5 turns of the helix without hydrostatic pockets are mutually opposite . FIG. 1 shows the proposed transmission, longitudinal section; in fig. 2 - the same, cross section; in fig. 3 is the average plot of the radial components of the pressure forces of the working medium. Transmission contains screw 1 and nut 2. On the nut, the centering
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU731906453A SU636439A1 (en) | 1973-04-09 | 1973-04-09 | Screw-nut hydrostatic transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU731906453A SU636439A1 (en) | 1973-04-09 | 1973-04-09 | Screw-nut hydrostatic transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU636439A1 true SU636439A1 (en) | 1978-12-05 |
Family
ID=20549159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU731906453A SU636439A1 (en) | 1973-04-09 | 1973-04-09 | Screw-nut hydrostatic transmission |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU636439A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4586394A (en) * | 1982-07-30 | 1986-05-06 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Low noise lead screw positioner |
-
1973
- 1973-04-09 SU SU731906453A patent/SU636439A1/en active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4586394A (en) * | 1982-07-30 | 1986-05-06 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Low noise lead screw positioner |
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