Tensioner
AssigneeTsubakimoto Chain Co.
InventorYuichiro Ishikawa
Life of this patent
Estimating the term…
Abstract
Provided is a tensioner which has a small total number of components and no risk of incorrect assembly, allows easy load change, is easy to assemble, and excellently stabilizes an oil pressure in a pressure oil chamber. The tensioner 100 includes a relief mechanism that relieves oil to the outside of a plunger 110 when the oil pressure in the pressure oil chamber formed between the plunger 110 and a plunger containing hole 121 in a housing 120 increases, relief holes 141 extending through the plunger 120 from the inside of a plunger inner space 111 to an outer circumferential side thereof, and a hole closing member 142 that is pressed into an opening of each of the relief holes 141 on the outer circumferential side.
Claims7
A tensioner comprising:
- a plunger having a rearwardly open plunger inner space;
- a housing having a forwardly open plunger containing hole that contains the plunger;
- a main biasing means extendably and retractably contained in a pressure oil chamber formed between the plunger and the plunger containing hole to forwardly bias the plunger;
- and
- a relief mechanism that relieves oil in the pressure oil chamber to the outside of the plunger when an oil pressure in the pressure oil chamber increases,
- the relief mechanism including a relief hole extending through the plunger from the inside of the plunger inner space to an outer circumferential side thereof and a hole closing member pressed into an opening of the relief hole on the outer circumferential side.
Dependencies are inferred from the claim text.