JPH0320751U

JPH0320751U -

Info

Publication number: JPH0320751U
Application number: JP8135789U
Authority: JP
Priority date: 1989-07-10
Filing date: 1989-07-10
Publication date: 1991-02-28
Anticipated expiration: 2004-07-10
Also published as: JPH0721945Y2

Description

[Brief explanation of drawings]

第１図は第１実施例の縦断側面図、第２図は同
上の正面図、第３図は第２図の−線の断面図
、第４図は同上の力関係の説明図、第５図は同上
の分解斜視図、、第６図は第２実施例の縦断側面
図、第７図は同上の正面図、第８図は第３実施例
の縦断側面図、第９図は同上の正面図、第１０図
は第４実施例の縦断側面図、第１１図は同上の正
面図、第１２図は同上の力関係の説明図である。１……プーリ、２……プーリ軸、３……内輪、
４……転動体、５……外輪、６……ボルト挿通孔
、７……段付き孔、８，８′……雌ねじ、９……
プレート、１０……ノツクピン、１１……ビス、
１２……孔、１３……腕、１４……張力調整バネ
、１５……プーリ取付基台、１６……プーリ台座
、１７，１７′……傾斜カム面、１８……固定ボ
ルト挿通孔、１９……ベルト、２０……ノツクピ
ン、２１……固定ボルト、２２……スリーブ、２
３……すべり軸受、２４……つば、２６，２６′
……雄ねじ、２７……キヤツプ部材、２８……凹
所、２９……ねじりコイルバネ、３０……ピン、
３１，３１′……ねじりコイルバネ、３２……ピ
ン、３３……突出部、３４……ビス。 Fig. 1 is a vertical sectional side view of the first embodiment, Fig. 2 is a front view of the same as above, Fig. 3 is a sectional view taken along the - line in Fig. 2, Fig. 4 is an explanatory diagram of the force relationship of the above, Fig. 5 The figures are an exploded perspective view of the same as above, Fig. 6 is a vertical side view of the second embodiment, Fig. 7 is a front view of the same as above, Fig. 8 is a longitudinal side view of the third embodiment, and Fig. 9 is a longitudinal side view of the same as above. 10 is a longitudinal sectional side view of the fourth embodiment, FIG. 11 is a front view of the same, and FIG. 12 is an explanatory diagram of the force relationship of the above. 1...Pulley, 2...Pulley shaft, 3...Inner ring,
4...Rolling element, 5...Outer ring, 6...Bolt insertion hole, 7...Stepped hole, 8, 8'...Female thread, 9...
Plate, 10...knot pin, 11...screw,
12... Hole, 13... Arm, 14... Tension adjustment spring, 15... Pulley mounting base, 16... Pulley pedestal, 17, 17'... Inclined cam surface, 18... Fixing bolt insertion hole, 19 ... Belt, 20 ... Knock pin, 21 ... Fixing bolt, 22 ... Sleeve, 2
3...Slide bearing, 24...Brim, 26, 26'
... Male thread, 27 ... Cap member, 28 ... Recess, 29 ... Torsion coil spring, 30 ... Pin,
31, 31'... Torsion coil spring, 32... Pin, 33... Protrusion, 34... Screw.

Claims

[Scope of Claim for Utility Model Registration] (1) A fixing bolt is inserted into an eccentric position of the pulley shaft, the pulley shaft is rotatably supported by the fixing bolt, and a tension is applied to the pulley shaft to urge the pulley in the belt tensioning direction. Attach one end of the adjustment spring, form an inclined cam surface facing the pulley shaft on the pulley base integrated with the pulley fixing member, and gradually move the inclined cam surface away from the pulley shaft in the direction in which the pulley swings when tensioning the belt. One end of a torsion coil spring that is formed to have an inclination that tends to separate, and that a male thread parallel to the fixing bolt is screwed into the pulley shaft, and its tip is brought into contact with the inclined cam surface, and that a rotational torque is applied to the male thread in the screwing direction. Belt tension adjustment device with attached. (2) The belt tension adjustment device according to claim 1, wherein the tension adjustment spring is omitted and the other end of the torsion coil spring is locked to the outer diameter surface of the pulley shaft. (3) A fixing bolt is inserted into the eccentric position of the pulley shaft, the pulley shaft is rotatably supported by the fixing bolt, an inclined cam surface is formed on the surface of the pulley shaft facing the pulley pedestal, and the inclined cam surface is The pulley is formed to have an inclination that gradually tends to move away from the pulley base in the direction in which the pulley swings when tensioning the belt,
A belt tension adjustment device in which a male screw is screwed into a pulley base in the opposite direction to the fixing bolt, the tip of the male screw is brought into contact with the inclined cam surface, and one end of a torsion coil spring is attached to the male screw to apply rotational torque in the screwing direction.