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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

Pending Publication Date: 2020-12-04
江西沃德成科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: in order to solve the problem that the nut of the planetary roller screw in the prior art is difficult to ensure the concentricity, thereby providing a planetary roller screw and its assembly method

Method used

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  • Planetary roller screw and assembling method thereof
  • Planetary roller screw and assembling method thereof
  • Planetary roller screw and assembling method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0057] This embodiment provides a planetary roller screw, such as Figure 1-5 shown, including:

[0058]A split nut assembly, the split nut assembly includes a sleeve 16, a first nut 11A, a second nut 11B, and an axial positioning member 15, and one end of the sleeve 16 has a socket for the first nut 11A, the The opening where the second nut 11B is installed, the first nut 11A and the second nut 11B are installed at both ends of the sleeve 16 respectively, the first nut 11A and the second nut 11B are connected to the There is a limiting structure between the sleeves 16 to limit the rotation of the first nut 11A and the second nut 11B; The first nut 11A and the second nut 11B are enclosed inside the sleeve 16;

[0059] Lead screw 12, installed inside the split nut assembly, coaxial with the split nut assembly;

[0060] The roller 13 is installed between the outer wall of the lead screw 12 and the inner wall of the split nut assembly, and the lead screw 12, the roller 13, and...

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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.

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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Application Information

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IPC IPC(8): F16H25/22
CPCF16H25/2252F16H25/2266
Inventor 欧东升
Owner 江西沃德成科技有限公司
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