US 11,078,955 B2Granted

Tapered roller bearing

AssigneeNtn Corporation

InventorTomoki Matsushita

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Abstract

Provided is a tapered roller bearing (1, 1′, 21) which is to be used for a pilot portion and an idler portion of a synchronous mesh-type transmission in which a component corresponding to a bearing outer ring (3, 23) is formed of a gear (34, 43), wherein a ratio L/Dw of a roller length (L) of a tapered roller (4) serving as a rolling element to a roller diameter (Dw) is set to 1.7 or more, wherein a rolling surface (6) of the tapered roller (4) includes a straight portion (6a) in a center portion of the rolling surface (6) in an axial direction and crowning portions (6b, 6c) extending from the straight portion (6a) to both end portions, and wherein the crowning portions (6b, 6c) are each formed of logarithmic crowning.

Claims5

Dependent claims

A tapered roller bearing which is to be used for a pilot portion and an idler portion of a synchronous mesh-type transmission in which a component corresponding to a bearing outer ring is formed of a gear, the tapered roller bearing comprising a tapered roller,

wherein a ratio L/Dw of a length (L) of the tapered roller serving as a rolling element to a roller diameter (Dw) of the tapered roller is set to 1.7 or more,
wherein a rolling surface of the tapered roller comprises a straight portion in a center portion of the rolling surface in an axial direction and crowning portions extending from the straight portion to both end portions,
wherein the crowning portions are each formed of logarithmic crowning, and
wherein a ratio Dr/Dw of a drop amount (Dr) of one of the crowning portions of the rolling surface to the roller diameter (Dw) falls within a range of from 0.003 to 0.03.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 16/089,506Filed 23 Mar 2017
Priority: JP JP2016-0743321 Apr 2016
Published: US 2020/0300294 A124 Sep 2020
Granted: 3 Aug 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

F16C 19/364
With a single row of rollers: with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
F16C 33/366
With bearing-surfaces other than cylindrical, e.g. tapered; with grooves in the bearing surfaces: tapered rollers, i.e. rollers generally shaped…
F16C 33/581
Raceways; Race rings: integral with other parts, e.g. with housings or machine elements such as shafts or gear wheels
F16C 2240/50
Linear dimensions, e.g. length, radius, thickness, gap: crowning, e.g. crowning height or crowning radius

Family

US 2020/0300294 A1Pre-grant publication · published 24 Sep 2020
US 11,078,955 B2This patent

From the US filing history. Foreign family members aren’t listed.

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