Automatic shoe clearance adjustment apparatus
AssigneeNisshinbo Industries, Inc.
InventorsYuusuke Taniguchi, Nobuhisa Arai
Life of this patent
Estimating the term…
Abstract
To reduce the number of components of the automatic shoe clearance adjustment apparatus and to improve the ease of assembly of the same, the proximal portion of the driving member is fixed on the strut. The operating portion and the arm of the driving member are integrally formed therewith is placed between the brake shoe and the strut. The operating portion together with the arm of the driving member are moved (rotated) so as to follow the movement of the brake shoe by utilizing the resilient force of the driving member, and the pawl at the end of the arm drives the adjustment teeth of the strut to extend the entire length of the strut.
Claims17
An automatic shoe clearance adjustment apparatus having:
- a strut and a driving member,
- said strut is comprised of a screw-engaging unit having a nut and a bolt screwed therebetween and a fitting member rotatably fitting with said screw-engaging unit, and extended between one brake shoe and the other brake shoe, and
- said driving member engages with adjustment teeth integrated with said screw-engaging unit of the strut,
- in which said automatic shoe clearance adjustment apparatus has an automatic shoe clearance adjustment mechanism, automatically extending an entire length of said strut to adjust a shoe-to-drum clearance by driving the adjustment teeth in one direction when strokes of the brake shoes exceed a predetermined value or range, wherein
- said driving member is comprised of a proximal portion fixed on said strut at a side being near to said one brake shoe,
- an operating portion extending from said proximal portion and resiliently abutting against said one brake shoe between said one brake shoe and said strut in a longitudinal direction of said strut, and
- an arm having a pawl extending from said operating portion toward said adjustment teeth to make an engagement therebetween.
Dependencies are inferred from the claim text.