JPH0441142U

JPH0441142U -

Info

Publication number: JPH0441142U
Application number: JP8392490U
Authority: JP
Priority date: 1990-08-07
Filing date: 1990-08-07
Publication date: 1992-04-08
Anticipated expiration: 2005-08-07
Also published as: JPH0749108Y2

Description

[Brief explanation of the drawing]

第１図ないし第６図は本考案の一実施例にかか
り、第１図はオートテンシヨナの一部切欠き正面
図、第２図は第１図における−線断面矢視図
、第３図は第２図における−線断面矢視図、
第４図は第２図における−線断面矢視図、第
５図はねじりトルク特性を示す図、第６図はベル
トの張力調節時の操作説明図である。また、第７
図は従来構造の要部縦断正面図、第８図は従来の
オートテンシヨナにおけるねじりトルク特性を示
す図である。１……ベース、２……テンシヨンアーム、２ａ
……ボス部、２ｃ……第２バネ受け部、３……テ
ンシヨンプーリ、５……コイルバネ、５ａ……一
端部、５ｂ……他端部、１１……第１バネ受け部
。 1 to 6 show an embodiment of the present invention, in which FIG. 1 is a partially cutaway front view of an autotensioner, FIG. 2 is a cross-sectional view taken along the line - in FIG. 1, and FIG. is a cross-sectional view taken along the - line in FIG. 2,
FIG. 4 is a cross-sectional view taken along the line - in FIG. 2, FIG. 5 is a diagram showing torsional torque characteristics, and FIG. 6 is an explanatory diagram of the operation when adjusting the tension of the belt. Also, the seventh
The figure is a longitudinal sectional front view of a main part of a conventional structure, and FIG. 8 is a diagram showing torsional torque characteristics in a conventional autotensioner. 1...Base, 2...Tension arm, 2a
...Boss part, 2c...Second spring receiving part, 3...Tension pulley, 5...Coil spring, 5a...One end part, 5b...Other end part, 11...First spring receiving part.

Claims

[Scope of Claim for Utility Model Registration] A tension arm equipped with a tension pulley is swingably supported as a base, and one end of a coil spring is attached to a boss part for a swing fulcrum protruding from the tension arm. The auto tensioner is configured such that one end of the coil spring is locked and fixed to the base, and the other end of the coil spring is locked to the tension arm so that the tension arm is biased to swing in a certain direction by the torsional restoring force of the coil spring. one end and the other end of the coil spring are respectively locked to a base and a tension arm at substantially the same phase angle position on the circumference, and about 90 degrees from the one end of the coil spring to the base. The tension arm is provided with a first spring receiving portion that receives the inner peripheral portion of the coil spring at a point up to the phase angle portion of approximately 90 degrees, and the tension arm is provided with a first spring receiving portion that receives the inner circumferential portion of the coil spring from the other end of the coil spring to the phase angle portion of approximately 90 degrees. An autotensioner characterized in that a second spring receiving part is provided to receive the inner peripheral part of the range at a point.