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1. WO2020001686 - SCREW DRIVE AND LINEAR ACTUATOR COMPRISING SAID SCREW DRIVE

Publication Number WO/2020/001686
Publication Date 02.01.2020
International Application No. PCT/DE2019/100538
International Filing Date 12.06.2019
IPC
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
H
GEARING
25
Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
18
for conveying or interconverting oscillating or reciprocating motions
20
Screw mechanisms
24
Elements essential to such mechanisms, e.g. screws, nuts
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
C
SHAFTS; FLEXIBLE SHAFTS; MECHANICAL MEANS FOR TRANSMITTING MOVEMENT IN A FLEXIBLE SHEATHING; ELEMENTS OF CRANKSHAFT MECHANISMS; PIVOTS; PIVOTAL CONNECTIONS; ROTARY ENGINEERING ELEMENTS OTHER THAN GEARING, COUPLING, CLUTCH OR BRAKE ELEMENTS; BEARINGS
19
Bearings with rolling contact, for exclusively rotary movement
22
with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
30
for axial load mainly
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
H
GEARING
25
Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
18
for conveying or interconverting oscillating or reciprocating motions
20
Screw mechanisms
22
with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
H
GEARING
25
Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
18
for conveying or interconverting oscillating or reciprocating motions
20
Screw mechanisms
F16H 25/24 (2006.01)
F16C 19/30 (2006.01)
F16H 25/22 (2006.01)
F16H 25/20 (2006.01)
CPC
B62D 7/146
F16C 19/305
F16C 2240/30
F16H 2025/2081
F16H 2025/2096
F16H 25/2252
Applicants
  • SCHAEFFLER TECHNOLOGIES AG & CO. KG [DE/DE]; Industriestraße 1-3 91074 Herzogenaurach, DE
Inventors
  • HAUSMANN, Alexander; DE
  • FABER, Daniel; DE
  • WÜBBOLT-GORBATENKO, Benjamin; DE
Priority Data
10 2018 115 788.629.06.2018DE
Publication Language German (DE)
Filing Language German (DE)
Designated States
Title
(DE) GEWINDETRIEB UND LINEARAKTUATOR MIT DIESEM GEWINDETRIEB
(EN) SCREW DRIVE AND LINEAR ACTUATOR COMPRISING SAID SCREW DRIVE
(FR) ENTRAÎNEMENT FILETÉ ET ACTIONNEUR LINÉAIRE COMPORTANT CET ENTRAÎNEMENT FILETÉ
Abstract
(DE)
Gewindetrieb, mit einem Gehäuse (5), und mit einer Mutter (2), die auf einer gegenüber der Mutter (2) axial verlagerbaren Gewindespindel (1 ) angeordnet ist, und mit einem Axialwälzlager (3) zur axialen Lagerung der drehbaren Mutter (2) an dem Gehäuse (5), wobei das Axialwälzlager (3) über den Umfang verteilt angeordnete stabförmige Wälzkörper (26) aufweist, die an Laufbahnen (18, 19) des Axialwälzlagers (3) abwälzen. Wenigstens ein stabförmiger Wälzkörper (26) ist als Reibwälzkörper (27) ausgebildet, dessen Rotationsachse radial beabstandet ist zur Lagerachse des Axialwälzlagers (3). Der Gesamtwirkungsgrad des Gewindetriebs kann unter 50 Prozent gehalten werden, also im Selbsthemmungsbereich liegen.
(EN)
A screw drive, comprising a housing (5), and comprising a nut (2) which is arranged on a threaded spindle (1) which is axially displaceable relative to the nut (2), and comprising an axial rolling bearing (3) for the axial mounting of the rotatable nut (2) on the housing (5), wherein the axial rolling bearing (3) has rod-shaped rolling bodies (26) which are arranged so as to be distributed over the circumference and which roll on raceways (18, 19) of the axial rolling bearing (3). At least one rod-shaped rolling body (26) is designed as a frictional rolling body (27), the axis of rotation of which is radially spaced apart from the bearing axis of the axial rolling bearing (3). The overall efficiency of the screw drive can be kept below 50 percent, that is to say can lie in the self-locking range.
(FR)
L'invention concerne un entraînement fileté, comprenant un boîtier (5) et un écrou (2) disposé sur une tige filetée (1) déplaçable de manière axiale par rapport à l'écrou (2), et comprenant un palier à roulement axial (3) pour le montage axial de l'écrou (2) rotatif sur le boîtier (5), le palier à roulement axial (3) comprenant des corps roulants (26) en forme de tige qui sont disposés sur sa périphérie et roulent sur les pistes (18,19) du palier à roulement axial (3). Au moins un élément roulant (26) en forme de tige se présente sous la forme d'un élément roulant à friction (27), dont l'axe de rotation est espacé de manière radiale à l'axe du palier à roulement axial (3). Le rendement global de l'entraînement fileté peut être maintenu en dessous de 50 %, c'est-à-dire à l'intérieur de la plage d'autoblocage.
Latest bibliographic data on file with the International Bureau