Nut of a planetary roller screw drive, and method for producing such a nut

A thread transmission, planetary roller technology, applied in the direction of transmission, belt/chain/gear, mechanical equipment, etc., can solve the problem of high cost

Inactive Publication Date: 2013-02-13
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, such cutting operations are expensive

Method used

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  • Nut of a planetary roller screw drive, and method for producing such a nut
  • Nut of a planetary roller screw drive, and method for producing such a nut
  • Nut of a planetary roller screw drive, and method for producing such a nut

Examples

Experimental program
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Embodiment Construction

[0028] refer to Figure 4 First, the construction of a conventional planetary roller screw drive is described insofar as it is useful for understanding the present invention.

[0029] In this planetary roller screw transmission, the nut 1 is arranged on the threaded spindle 2 with the planetary elements 3 inserted in between. The lead screw 2 is provided with a helical thread 4 . The nut 1 is provided on its inner periphery with two groove profiles 5 which are each formed by a plurality of grooves 6 . The grooves 6 are annularly closed and are arranged parallel to one another in a plane lying transversely to the axis of the nut 1 .

[0030] The planet 3 has a central section 7 , and end sections 8 , which are radially descending relative to the central section 7 , and which are placed towards both axial sides of the central section 6 . The middle section 7 is provided with a grooved profile 9 on its outer circumference, which is formed by a plurality of grooves 10 . The gro...

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PUM

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Abstract

The invention relates to a nut (1, 13, 21, 25) of a planetary roller screw drive. A sleeve (14) which is produced by metal forming is provided, and two rings (16) that lie at a fixed distance with respect to each other in the axial direction are provided in said sleeve. In order to engage planets (3), the one ring (16) has the one groove profile (18), and the other ring (16) has the other groove profile (18).

Description

technical field [0001] The invention relates to a nut for a planetary roller screw transmission part. In planetary roller screw drives of this type, the spindle nut is usually arranged on the spindle, wherein the planets are distributed on one side of the circumference in an annular gap delimited by the spindle nut and the spindle One side is in rolling engagement with the lead screw, while the other side is in rolling engagement with the lead screw nut. When the lead screw nut and lead screw are twisted relative to each other, this relative rotation is converted into an axial relative movement between the lead screw and lead screw nut. In the axial direction, a form-locking connection is produced in the planetary roller screw drive due to the rolling engagement of the planets. There is no axial relative movement without relative rotation between the lead screw nut and the lead screw. Background technique [0002] From DE 10 2008 008013 B3, for example, a planetary roller...

Claims

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Application Information

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IPC IPC(8): F16H25/22
CPCF16H25/2252Y10T74/19795
Inventor 米夏埃尔·库尔茨迪特马尔·鲁迪雷纳·克莱贝尔托马斯·莫茨霍斯特·格雷迪马蒂亚斯·多尔
Owner SCHAEFFLER TECH AG & CO KG
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