| 摘要 |
PROBLEM TO BE SOLVED: To manually perform a switching operation even if a free wheel hub mechanism of a four-wheel device vehicle cannot perform automatically the switching of the connection and disconnection of driven-side wheels and driven-side axles.SOLUTION: One end part of a cylindrical operation piece 38 which opposes an axial end part 11a of a front-side axle (driven-side axle) 11 in an axial direction is fit into an attachment hole 37 formed at a hub housing 17 so as to be turnable, a sleeve 41 which is slidably fit into an external periphery of the operation piece 38 at the other side is slidably and non-rotatably supported to the operation piece 38, an engagement groove 41b which obliquely extends to the axial direction is formed at the sleeve 41, a pin 43 which is inserted into the engagement groove 41b of the sleeve 41 is arranged at the operation piece 38, and a slide gear 19 attached to the front-side axle 11 can be engaged with an outer gear 18 attached to a front wheel (driven-side wheel) 13, or released therefrom by moving the sleeve 41 to the axial direction by manually turning the operation piece 38.SELECTED DRAWING: Figure 3 |
