JPH0471845U

JPH0471845U -

Info

Publication number: JPH0471845U
Application number: JP11505190U
Authority: JP
Priority date: 1990-10-30
Filing date: 1990-10-30
Publication date: 1992-06-25
Anticipated expiration: 2005-05-17
Also published as: JPH0721946Y2

Description

[Brief explanation of the drawing]

第１図は第１実施例の正面図、第２図は第１図
の−線の断面図、第３図は第１図の−線
の断面図、第４図及び第５図はそれぞれピストン
に対する力の作用状態を示す図、第６図は第２実
施例の正面図、第７図は第６図の−線の断面
図、第８図は第７図の−線の断面図、第９図
は第３実施例の正面図、第１０図は第９図のＸ−
Ｘ線の断面図、第１１図は第９図の−Ｘ線
の断面図である。１……プーリ、２，３０……プーリ支持体、７
……支持軸、１２，３６……有底孔、１３……摩
擦部材、１４，３７，４１……ピストン、１６…
…弾性部材、１７，３８，４０……傾斜カム面、
２０，３４……張力調整バネ、Ａ……ベルト。 FIG. 1 is a front view of the first embodiment, FIG. 2 is a sectional view taken along the - line in FIG. 1, FIG. 3 is a sectional view taken along the - line in FIG. 6 is a front view of the second embodiment, FIG. 7 is a sectional view taken along the - line in FIG. 6, and FIG. 8 is a sectional view taken along the - line in FIG. FIG. 9 is a front view of the third embodiment, and FIG. 10 is a front view of the third embodiment.
11 is a sectional view taken along the -X line in FIG. 9. 1... Pulley, 2, 30... Pulley support, 7
... Support shaft, 12, 36 ... Bottomed hole, 13 ... Friction member, 14, 37, 41 ... Piston, 16 ...
...Elastic member, 17, 38, 40... Inclined cam surface,
20, 34...Tension adjustment spring, A...Belt.

Claims

[Scope of utility model registration request]

A pulley support body that rotatably supports a pulley,
The pulley is swingably mounted on a fixed member by a fulcrum shaft inserted eccentrically from the center of the pulley, and the pulley support is provided with a piston that moves forward and backward toward the fixed member parallel to the fulcrum shaft, and the piston and pulley support an elastic member that urges the piston toward the fixed member, and a friction member that presses against the circumferential surface of the piston with a radial force to generate frictional force, and the fixed member is provided with an elastic member that urges the piston toward the fixed member, and A slanted cam surface is formed in contact with the slanted cam surface to move the piston forward and backward in the axial direction when the pulley support swings. A belt tension adjustment device that connects a tension adjustment spring that biases the belt.