Processing

Please wait...

Settings

Settings

1. EP3396207 - WORM WHEEL, WORM DECELERATOR, AND METHOD FOR PRODUCING WORM WHEEL

Office European Patent Office
Application Number 17747293
Application Date 26.01.2017
Publication Number 3396207
Publication Date 31.10.2018
Publication Kind A4
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
55
Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
02
Toothed members; Worms
22
for transmissions with crossing shafts, especially worms, worm-gears
B PERFORMING OPERATIONS; TRANSPORTING
29
WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
C
SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
45
Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
14
incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
B PERFORMING OPERATIONS; TRANSPORTING
29
WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
C
SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
45
Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
17
Component parts, details or accessories; Auxiliary operations
26
Moulds
27
Sprue channels
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
1
Toothed gearings for conveying rotary motion
02
without gears having orbital motion
04
involving only two intermeshing members
12
with non-parallel axes
16
comprising worm and worm-wheel
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
55
Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
02
Toothed members; Worms
06
Use of materials; Use of treatments of toothed members or worms to affect their intrinsic material properties
F16H 55/22
B29C 45/14
B29C 45/27
F16H 1/16
F16H 55/06
CPC
B29C 45/0046
B29C 45/14311
B29C 45/1459
B29C 45/2708
B29C 2045/2714
B29L 2015/00
Applicants NSK LTD
Inventors KIYOTA HARUHIKO
YAMAMOTO TAKESHI
YASUDA KANAME
ARAI TOMOHIRO
TAKANO JUNICHI
HOTTA KAZUKI
Designated States
Priority Data 2016018234 02.02.2016 JP
2016249615 22.12.2016 JP
2017002669 26.01.2017 JP
Title
(DE) SCHNECKENRAD, SCHNECKENBREMSVORRICHTUNG UND VERFAHREN ZUR HERSTELLUNG EINES SCHNECKENRADS
(EN) WORM WHEEL, WORM DECELERATOR, AND METHOD FOR PRODUCING WORM WHEEL
(FR) ROUE À VIS SANS FIN, DÉCÉLÉRATEUR À VIS SANS FIN ET PROCÉDÉ DE FABRICATION DE ROUE À VIS SANS FIN
Abstract
(EN)
A first concave-convex part (23) is formed in an outer diameter side circumferential surface of a first annular concave part (22) provided in an axial one-side surface of an inner wheel element (15a), and a second concave-convex part (49) is formed in a bottom surface of a second annular concave part (38) provided in the axial other-side surface of the inner wheel element (15a). Using an outer circumferential surface of the inner wheel element (15a) as a cylindrical surface part (24), an outer circumferential part of the inner wheel element (15a) is embedded in an outer wheel element (16a), and synthetic resin forming the outer wheel element (16a) partially enters into a plurality of concave parts constituting the first concave-convex part (23) and the second concave-convex part (49). Thus, a configuration is achieved in which the holding power of a synthetic resin outer wheel can be secured from the metal inner wheel element, and the manufacturing error can be suppressed in the worm wheel tooth part provided in the outer circumferential surface of the outer wheel.

(FR)
Dans la présente invention : une première section concave/convexe (23) est prévue sur une surface périphérique du côté diamètre extérieur d'une première concavité annulaire (22) prévue sur une surface latérale de direction axiale d'un élément de roue intérieure (15a); et une seconde section concave/convexe (49) est prévue sur une surface inférieure d'une seconde concavité annulaire (38) prévue sur une autre surface latérale de direction axiale de l'élément de roue interne (15a). Une section périphérique extérieure de l'élément de roue interne (15a) est incorporée dans un élément de roue extérieur (16a), la surface périphérique extérieure de l'élément de roue interne (15a) étant une section de surface cylindrique (24); en outre, une petite partie de la résine synthétique constituant l'élément de roue externe (16a) est introduite dans une pluralité de concavités constituant la première section concave/convexe (23) et la seconde section concave/convexe (49). En raison de cette configuration, une structure est implémentée qui permet de supprimer des erreurs de fabrication dans une section de dent de roue à vis sans fin prévue sur la surface périphérique extérieure de la roue externe, tout en assurant la force de retenue de l'élément de roue externe, en résine synthétique, sur l'élément de roue interne en métal.