Unlock instant, AI-driven research and patent intelligence for your innovation.

Actuators with planetary roller thread drives

A planetary roller, threaded transmission technology, applied in the field of clutches, to achieve the effect of having bearing capacity, reducing manufacturing and installation costs, and reducing the number of parts

Active Publication Date: 2021-04-02
SCHAEFFLER TECH AG & CO KG
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage here is that axial forces from one direction can only be supported when only one ring gear rolling bearing is used

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Actuators with planetary roller thread drives
  • Actuators with planetary roller thread drives
  • Actuators with planetary roller thread drives

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] figure 1 A longitudinal section through a planetary roller screw drive according to the prior art is shown. The screw 2 is engaged by a plurality of planetary rollers 3 which mesh with a ring gear 4 surrounding the planetary rollers. The planetary rollers 3 are positioned at both ends in a planetary roller carrier 5 , which is mounted in a rotationally fixed manner in a sleeve 6 surrounding the ring gear 4 . The sleeve 6 and the planetary roller carrier 5 supported therein are fixed axially and are connected in a rotationally fixed manner via the sleeve 6 to a rotor (not shown) of the drive. The sleeve 6 is rotatably mounted via the main bearing 8 , wherein a bearing raceway 8 . 1 for the interior of the main bearing 8 is contained in the sleeve 6 . The bearing outer ring 8.2 of the main bearing 8 has a radially outwardly directed flange 8.3 for axial and rotationally fixed support on a not shown stator-side housing. The axial support of the planetary roller carrier ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

According to the invention, an actuator with a planetary roller thread gear (PWG), in particular for actuating a clutch of a vehicle, is proposed, wherein a plurality of planetary rollers are engaged with a screw, said planetary rollers being connected to a ring surrounding the planetary rollers. The ring gear meshes, wherein the planetary rollers are positioned at both ends in the planetary roller carrier, and the planetary roller carrier is supported against rotation in a sleeve surrounding the ring gear, and wherein the ring gear according to the invention via at least one The ring gear bearing is supported by the ring gear bearing, which absorbs the axial force in the direction of the operating stroke and opposite thereto.

Description

technical field [0001] The invention relates to an actuator with a planetary roller screw gear (PWG) and applies in particular to actuating a clutch of a vehicle. Background technique [0002] Planetary roller screw drives (PWG), also known as planetary roller screw drives or planetary roller screws, are known for a long time and are described, for example, in DD 0 277 308 A5. For example, a planetary roller screw drive is known from document DE 10 2010 047 800 A1, which is incorporated in a hydrostatic actuator in the form of a hydrostatic clutch actuator in order to convert a rotational movement generated by means of an electric motor into an axial movement . From the document DE 10 2010 011820 A1 a planetary roller screw drive is known, which has: a screw; a nut arranged on the screw; and a plurality of distributed over the circumference, arranged on the screw and the nut The planetary elements are arranged in a rolling manner on the inner circumference of the nut and o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F16H25/22
CPCF16H25/2252F16D23/12F16D28/00F16H2025/2078
Inventor 拉斯洛·曼彼得·格雷布
Owner SCHAEFFLER TECH AG & CO KG