Planetary roller screw and assembling method thereof

A technology of planetary rollers and assembly methods, which is applied to transmission devices, belts/chains/gears, mechanical equipment, etc., can solve problems such as difficulty in ensuring concentricity of nuts, and achieve the effect of reducing precision requirements
CN112032267APending Publication Date: 2020-12-04江西沃德成科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
江西沃德成科技有限公司
Publication Date
2020-12-04

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Abstract

The invention relates to a planetary roller screw. The planetary roller screw comprises a split type nut assembly, a lead screw, and a roller, wherein the split type nut assembly comprises a sleeve, afirst nut, a second nut and an axial positioning piece, wherein an opening for allowing the first nut and the second nut to be loaded therein is formed in one end of the sleeve, the first nut and thesecond nut are installed at the two ends of the sleeve, limiting structures are installed between the first nut and the sleeve and between the second nut and the sleeve so as to limit rotation of thefirst nut and the second nut, and the axial positioning piece is installed at the opening of the sleeve and is used for sealing the first nut and the second nut inside the sleeve; the lead screw is installed inside the split type nut assembly and is coaxial with the split type nut assembly; and the roller is installed between the outer wall of the lead screw and the inner wall of the split type nut assembly, and the lead screw, the roller and the split type nut assembly are connected in a thread fit mode. The planetary roller screw has the beneficial effects that the split type nut assembly is adopted, the nuts can be separately machined outside the sleeve, and the precision requirement on the process requirement is greatly reduced.
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Description

technical field

[0001] The application belongs to the technical field of planetary roller screws, and in particular relates to a planetary roller screw and an assembly method thereof. Background technique

[0002] The planetary roller screw is a new type of transmission that converts rotary motion into linear motion. The planetary roller screw has higher impact resistance than the traditional ball screw, the static load of the planetary roller screw is about 3 times that of the traditional ball screw, and the life is about 15 times that of the traditional ball screw. And the planetary roller screw can have higher rotation speed and rotation acceleration, so it is widely used in the fields of precision instruments, weapons and equipment, industrial robots and aerospace.

[0003] An existing standard planetary roller screw consists of a screw, bushing and rollers. The radial preload is realized through the pitch interference fit between the nut, the lead screw and the roller...

Claims

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