US 9,752,662 B2Granted

Tensioner assembly

AssigneeNtn Corporation

InventorsTakehiro Takano, Seiji Sato

Life of this patent

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Abstract

A tensioner assembly includes a pulley arm pivotable about a pivot shaft, and a tension pulley mounted on the pulley arm at its end remote from the pivot shaft and pressed against a belt to keep the tension of the belt. The tension pulley is rotatably mounted around a base portion of the pulley arm through a rolling bearing with the inner surface and axial rear end surface of the bearing inner race in contact with the outer peripheral surface of the base portion and an end surface of a shoulder of the base portion, respectively. The base portion has an axial through hole formed with an internal thread on its inner surface. A support bolt is threaded into the through hole from the axial front end to press the rolling bearing against the end surface of the shoulder. The internal thread has an axial front end located in the vicinity of, or axially rearwardly of, the end surface of the shoulder.

Claims9

Dependent claims

A tensioner assembly comprising a pivot shaft, a pulley arm pivotable about the pivot shaft and having a base portion at an end of the pulley arm remote from the pivot shaft, a tension pulley rotatably mounted around the base portion through a rolling bearing, and a tensioner connected to the pulley arm and biasing the pulley arm such that the pulley arm pivots about the pivot shaft in a direction in which the tension pulley is pressed against a belt, thereby keeping constant the tension of the belt,

wherein the rolling bearing comprises an inner race having a radially inner surface in contact with an outer peripheral surface of the base portion, and an end surface formed at an axial rear end of the inner race and in contact with an end surface of a shoulder of the base portion, wherein the inner race has a chamfer extending along a ridge between the radially inner surface of the inner race and the end surface of the inner race, and wherein the base portion is formed with a through hole extending in an axial direction of the base portion and having an inner surface formed with an internal thread having an axial front end radially aligned with, or located axially rearwardly of, an axial front end of the chamfer.

wherein the rolling bearing comprises an inner race having a radially inner surface in contact with an outer peripheral surface of the base portion, and an end surface formed at an axial rear end of the inner race and in contact with an end surface of a shoulder of the base portion, wherein the base portion has a curved surface provided between, and smoothly connecting together, the outer peripheral surface of the base portion and the end surface of the shoulder of the base portion, and wherein the base portion is formed with a through hole extending in an axial direction of the base portion and having an inner surface formed with an internal thread having an axial front end radially aligned with, or located axially rearwardly of an axial front end of the curved surface.

Dependencies are inferred from the claim text.

Facts

Application: 14/886,129Filed 19 Oct 2015 · division
Priority: JP 2012-16373524 Jul 2012
Published: US 2016/0040760 A111 Feb 2016
Granted: 5 Sep 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

F16H 7/1281
Without vibration damping means: where the axis of the pulley moves along a substantially circular path
F16C 13/006
Rolls, drums, discs, or the like ; Bearings or mountings therefor: guiding rollers, wheels or the like, formed by or on the outer element of a…
F16C 33/586
Details of specific parts of races: outside the space between the races, e.g. end faces or bore of inner ring
F16C 33/7889
With a diaphragm, disc, or ring, with or without resilient members: mounted to an inner race and extending toward the outer race

Family

Application13/947,201Parent of this division · filed 22 Jul 2013
US 2016/0040760 A1Pre-grant publication · published 11 Feb 2016
US 9,388,882 B2Parent of this division
US 2014/0031157 A1Published application
US 9,752,662 B2This patent

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

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