JPS62172846U

JPS62172846U -

Info

Publication number: JPS62172846U
Application number: JP6098286U
Authority: JP
Priority date: 1986-04-24
Filing date: 1986-04-24
Publication date: 1987-11-02
Also published as: JPH0144851Y2

Description

[Brief explanation of the drawing]

第１図は本考案の実施例の縦断面図、第２図は
他の実施例の縦断面図、第３図は従来例の縦断面
図である。１……ピストン、１_１……摺動部、１_２……ピ
ストン室、２……シリンダ、３……圧縮スプリン
グ、４……逆止弁、５……流通路、６……隔壁、
７……油戻し室、８……戻し通路、９……可変容
積貯溜室、９_１……ブーツ、１０……盲板、１１
……連通孔、１３……止め部、１４……弁バネ。 FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of another embodiment, and FIG. 3 is a longitudinal sectional view of a conventional example. DESCRIPTION OF SYMBOLS 1... Piston, 1 ₁ ... Sliding part, 1 ₂ ... Piston chamber, 2... Cylinder, 3... Compression spring, 4... Check valve, 5... Flow path, 6... Partition wall,
7...Oil return chamber, 8...Return passage, 9...Variable volume storage chamber, 9 ₁ ...Boot, 10...Blind plate, 11
...Communication hole, 13...Stopping portion, 14...Valve spring.

Claims

[Claims for Utility Model Registration] 1. In a hydraulic chain tensioning device that applies tension to a chain or belt that transmits power and absorbs vibrations, a piston 1 having a sliding portion ₁₁ of a chain A presses a compression spring 3. The oil return chamber 7 and the piston chamber ₁₂ are connected to each other by a partition wall 6 which is movably fitted into the cylinder 2 through the cylinder 2 and provided with a flow passage 5 having a check valve 4 in the cylinder 2. 1 ₂ A tensioning device for a chain or the like, characterized in that a return passage 8 is provided in circulation communication with the oil return chamber 7 and the oil return chamber 7, and an elastic variable volume storage chamber 9 is formed in the middle of the return passage 8. 2. The piston 1 has a hollow cylindrical portion, and the peripheral wall is provided with a communicating hole 11 connected to the hollow portion to form a piston chamber ₁₂ , and the spring 3
The tensioning device according to claim 1, which is a device that is fitted and slidably fitted into the cylinder 2. 3. The tensioning device according to claim 1 or 2, wherein the oil return chamber 7 is partitioned by a blind plate 10 fitted to the cylinder 2. 4. The elastic variable volume storage chamber 9 is configured in a sealed structure with a flexible boot ₉₁ , and is attached to the piston 1 and the cylinder 2. The tensioning device according to any one of items 1 to 3. 5 The elastic variable volume storage chamber 9 is formed by partitioning the oil return chamber 7 with a flexible blind plate 10, and is connected to the piston 1 which opens into the piston chamber ₁₂ through the return passage 8. The tensioning device according to any one of claims 1 to 3 of the utility model registration, which communicates with the fitting gap.