Processing

Please wait...

Settings

Settings

Goto Application

1. EP3315817 - WORM SPEED REDUCER

Office
European Patent Office
Application Number 16817503
Application Date 24.02.2016
Publication Number 3315817
Publication Date 02.05.2018
Publication Kind A4
IPC
F16H 1/16
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
HGEARING
1Toothed gearings for conveying rotary motion
02without gears having orbital motion
04involving only two intermeshing members
12with non-parallel axes
16comprising worm and worm-wheel
B62D 5/04
BPERFORMING OPERATIONS; TRANSPORTING
62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
DMOTOR VEHICLES; TRAILERS
5Power-assisted or power-driven steering
04electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
F16C 23/06
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
CSHAFTS; 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
23Bearings for exclusively rotary movement adjustable for aligning or positioning
06Ball or roller bearings
F16H 55/24
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
HGEARING
55Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
02Toothed members; Worms
22for transmissions with crossing shafts, especially worms, worm-gears
24Special devices for taking up backlash
CPC
B62D 5/0409
BPERFORMING OPERATIONS; TRANSPORTING
62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
DMOTOR VEHICLES; TRAILERS
5Power-assisted or power-driven steering
04electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
0409Electric motor acting on the steering column
F16H 55/24
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
HGEARING
55Elements with teeth or friction surfaces for conveying motion; Worms; Pulleys; Sheaves
02Toothed members; Worms
22for transmissions with crossing shafts, especially worms, worm-gears
24Special devices for taking up backlash
F16C 23/06
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
23Bearings for exclusively rotary movement adjustable for aligning or positioning
06Ball or roller bearings
F16H 1/16
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
HGEARING
1Toothed gearings for conveying rotary motion
02without gears having orbital motion
04involving only two intermeshing members
12with non-parallel axes
16comprising worm and worm-wheel
F16H 57/022
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
HGEARING
57General details of gearing
02Gearboxes; Mounting gearing therein
021Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
022Adjustment of transmission shafts or bearings
F16H 57/12
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
HGEARING
57General details of gearing
12Arrangements for adjusting or for taking-up backlash not provided for elsewhere
Applicants NSK LTD
Inventors SEGAWA TORU
Designated States
Priority Data 2015130136 29.06.2015 JP
2015156671 07.08.2015 JP
2015216238 04.11.2015 JP
2015216239 04.11.2015 JP
2015216240 04.11.2015 JP
2015245532 16.12.2015 JP
2016018456 03.02.2016 JP
Title
(DE) SCHNECKENDREHZAHLMINDERER
(EN) WORM SPEED REDUCER
(FR) RÉDUCTEUR DE VITESSE À VIS SANS FIN
Abstract
(EN) A pair of wedge-shaped pieces (24, 24) are provided in an annular space (34) that is defined between an inner circumferential surface of a holding recess portion (21) and an outer circumferential surface of a bearing holder (22) in two position that are symmetrical with each other with respect to a meshing portion between a worm wheel (13) and worm teeth (17) and an imaginary plane ± that contains a center axis of a worm (14) in such a way as to fill the annular space (34). Then, an elastic force is imparted to both the wedge-shaped pieces (24, 24) in a direction in which the pair of wedge-shaped pieces move away from the meshing portion in relation to a circumferential direction. According to the above, in a worm reduction gear including a biasing device that elastically biases the worm teeth towards the worm wheel, a distal end portion of the worm is prevented from being displaced in a direction that is at right angles to the biasing direction.
(FR) Une paire de pièces en forme de coin (24, 24) est prévue de manière à remplir un espace en forme d'anneau (34), qui existe entre la surface circonférentielle interne d'un évidement de maintien (21) et la surface circonférentielle externe d'un support de palier (22), à deux emplacements dudit espace en forme d'anneau (34) qui sont symétriques par rapport à un plan imaginaire (α), qui comprend la section où une roue à vis sans fin (13) s'engrène avec des dents de vis sans fin (17) et l'axe central de la vis sans fin (14). Des forces élastiques sont appliquées sur les deux pièces en forme de coin (24, 24) dans la direction circonférentielle en s'éloignant de la section d'engrènement. Dans un réducteur de vitesse à vis sans fin pourvu d'un moyen de sollicitation pour solliciter élastiquement les dents de vis sans fin vers la roue à vis sans fin, il est ainsi possible d'empêcher le déplacement de l'extrémité distale de la vis sans fin dans une direction perpendiculaire à la direction de sollicitation.