Planetary rolled thread drive

A planetary roller and transmission mechanism technology, which is applied to transmission devices, gear transmission devices, mechanical equipment, etc., can solve the problems of expensive manufacturing of planetary roller screw transmission mechanisms, and achieve the effect of reducing requirements

Active Publication Date: 2013-06-05
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a planetary roller screw drive is very expensive to manufacture

Method used

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  • Planetary rolled thread drive

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Embodiment Construction

[0022] The single FIGURE shows a planetary roller screw drive according to the invention in longitudinal section. The spindle nut 1 is arranged on the spindle 2 . The spindle nut 1 or the spindle 2 can be driven and rotated by an electric drive (not shown).

[0023] A large number of planets 3 distributed over the circumference of the spindle 2 are in rolling engagement with the spindle 2 and the spindle nut 1 . The planets 3 run around the spindle axis of the spindle 2 on planetary orbits P arranged perpendicularly to the spindle axis. They rotate about their planetary axes and relative to the spindle 2 and the spindle nut 1 , wherein the planets 3 roll on the inner circumference of the spindle nut 1 and on the outer circumference of the spindle 2 .

[0024] The planets 3 are each formed by two coaxial planetary sub-parts 4 arranged axially one behind the other. The partial planets 4 are constructed identically. The planetary part 4 has a radially enlarged central section...

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Abstract

The invention relates to a planetary roller gear drive which has a spindle nut (1) that is arranged on a threaded spindle (2) and with planets (3) that are arranged distributed around the periphery and are in rolling engagement with the spindle nut (1) and the threaded spindle (2). The planets (3) revolve on a planetary orbit (P) that is arranged perpendicular to the spindle axis and the planets (3) are each divided into multiple planet parts (4) arranged one behind the other in the axial direction.

Description

technical field [0001] The invention relates to a planetary roller screw transmission mechanism, which converts the relative rotation between the screw nut and the screw into translational relative movement between the screw nut and the screw. Background technique [0002] A planetary roller screw drive is known from DE 10 2009 040 606 A1, which is provided with a large number of planets arranged distributed over the periphery, which are in rolling engagement with a spindle and a spindle nut, wherein the spindle has at least one thread The multitude of grooves are threads that are helically wound around the axis of the screw. The spindle nut is provided with a nut-side profile on its inner periphery, wherein the planet-side profile of the planets is in rolling engagement with the nut-side profile. The profile on the planet side is formed by annularly closed grooves arranged perpendicular to the planet axis. The planets run on planetary orbits arranged perpendicular to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H25/22
CPCF16H25/2252F16H1/28Y10T74/19791Y10T74/19795F16H25/2266F16H2025/2276
Inventor 迪特马尔·鲁迪
Owner SCHAEFFLER TECH AG & CO KG
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