Tensioner for a chain, a belt or the like
AssigneeNHK Spring Co., Ltd.
InventorsJuji Ojima, Kazuo Ishii, Fumio Numakura
Life of this patent
Estimating the term…
Abstract
A tensioner is provided with a female screw member for the tension adjustment of a belt or a chain screwed with a male screw provided a rotation force by a spring and a bearing in which the female screw member is inserted and constrains the rotation of the female screw member. In this tensioner, an outer form of the female screw member is formed so as to correspond to a bearing hole of the bearing. By this, an approximately whole length of the female screw member is able to slide through the bearing hole, and the stroke length of the female member can be secured sufficiently even if the size of the device in a tension controlling direction is shortened.
Claims14
In a tensioner for a chain, a belt or the like which comprises a male screw member and a female screw member installed within a casing in a screwed state, a spring which provides a rotation force to said male member and a bearing into which the female screw member is inserted so that the female screw may advance in a axial direction by the rotation of the male screw member together with constraining the rotation of said female member;
- said tensioner being charaterized in that said female screw member is screwed with said male screw member at the outside thereof and said spring is provided at the outside of the same female screw member thereby forming a triple construction.
Dependencies are inferred from the claim text.