JPH0473646U

JPH0473646U -

Info

Publication number: JPH0473646U
Application number: JP11538390U
Authority: JP
Priority date: 1990-11-05
Filing date: 1990-11-05
Publication date: 1992-06-29

Description

[Brief explanation of the drawing]

第１図は本考案の第一実施例を示す断面図、第
２図は本考案の第二実施例を、第３図は同第三実
施例を示す、それぞれ要部断面図、第４図はオー
トテンシヨナを付設した補機の駆動機構を示す正
面図、第５図は同じくオートテンシヨナを付設し
たエンジンのタイミングベルト駆動機構を示す正
面図、第６図はこのタイミングベルト駆動機構に
組み込んだ、従来のオートテンシヨナの１例を示
す正面図、第７図は従来のオートテンシヨナの別
例を示す断面図である。１……ベルト、１ａ……タイミングベルト、２
……駆動プーリ、３……従動プーリ、４……テン
シヨンプーリ、５……固定軸、６……揺動部材、
７……腕片、８……引つ張りばね、９……ボルト
、１０……基板、１１……固定軸、１２……揺動
部材、１３……枢軸、１４……転がり軸受、１５
，１６……Ｏリング、１７……隙間空間、１８…
…固定軸、１９……底板部、２０……固定側ハウ
ジング、２１……凸部、２２……揺動部材、２３
……円筒部、２４……ケース、２５……揺動側ハ
ウジング、２６……腕部、２７……枢軸、２８…
…スリーブ、２９……捩りコイルばね、３０……
平板部、３１……円筒部、３２……蓋板、３３…
…非円形筒部、３４……非円形孔、３５……凹溝
、３６……Ｏリング、３７……凹溝、３８……Ｏ
リング、３９……隙間空間、４０……注入孔、４
１……鋼球、４２……クラツチスプリング、４３
……コイル部、４４……係止部、４５……係止孔
、４６……クラツチスプリング、４７……スリー
ブ。 Fig. 1 is a sectional view showing the first embodiment of the present invention, Fig. 2 is a sectional view of the second embodiment of the invention, and Fig. 3 is a sectional view of the third embodiment of the invention, respectively. 5 is a front view showing the auxiliary drive mechanism equipped with an auto-tensioner, FIG. FIG. 7 is a front view showing one example of a conventional autotensioner, and a sectional view showing another example of the conventional autotensioner. 1...Belt, 1a...Timing belt, 2
... Drive pulley, 3 ... Driven pulley, 4 ... Tension pulley, 5 ... Fixed shaft, 6 ... Swinging member,
7... Arm piece, 8... Tension spring, 9... Bolt, 10... Board, 11... Fixed shaft, 12... Rocking member, 13... Pivot, 14... Rolling bearing, 15
, 16... O-ring, 17... Gap space, 18...
... Fixed shaft, 19 ... Bottom plate part, 20 ... Fixed side housing, 21 ... Convex part, 22 ... Swinging member, 23
... Cylindrical part, 24 ... Case, 25 ... Swing side housing, 26 ... Arm part, 27 ... Pivot, 28 ...
...Sleeve, 29...Torsion coil spring, 30...
Flat plate part, 31...Cylindrical part, 32...Lid plate, 33...
...Non-circular cylindrical portion, 34...Non-circular hole, 35...Concave groove, 36...O-ring, 37...Concave groove, 38...O
Ring, 39...Gap space, 40...Injection hole, 4
1...Steel ball, 42...Clutch spring, 43
... Coil part, 44 ... Locking part, 45 ... Locking hole, 46 ... Clutch spring, 47 ... Sleeve.

Claims

[Scope of utility model registration request]

By fitting a fixed shaft and a cylindrical portion formed at the base onto the fixed shaft, a swinging member is swingably supported around the fixed shaft, and a part of this swinging member has the above-mentioned A pivot provided parallel to the fixed shaft, a tension pulley pivotally supported by the pivot, and a tension pulley provided around the cylindrical portion, with one end fixed to the fixed shaft and the other end fixed to the swinging member. A torsion coil spring that presses the tension pulley toward the member to which tension is to be applied by locking the spring, and a torsion coil spring whose inner diameter in the free state is the same as or greater than the outer diameter of the cylindrical portion. The clutch spring has a slightly small coil part, and a clutch spring is externally supported by a cylindrical part inside the torsion coil spring, with a part of the coil part being engaged with a part fixed to the fixed shaft. , when the swinging member swings against the elasticity of the torsion coil spring, the clutch spring tends to contract its inner diameter due to friction between the inner diameter surface of the coil portion and the outer circumference surface of the cylindrical portion. and an autotensioner that prevents the swinging member from swinging about the fixed shaft.