| 摘要 |
<p>PURPOSE:To improve pressure resistance at a contact position of a cam surface with a shoe by adopting the cam surface wherein a normal vector at a position corresponding to a bottom dead center is inclined outward or inward in respect to a rotary shaft, and arranging the shoes between a piston and the cam surface of a web cam. CONSTITUTION:A rotary shaft 3 is supported to a pair of cylinder blocks 1, 2 through radial bearings 4, 5. A double-head piston 6 is slidably fitted to cylinder bores 1a, 2a of the cylinder blocks 1, 2. A web cam 7 is fixed to the rotary shaft 3. A pair of shoes 8, 9 are arranged between the double-head piston 6 and front/rear cam surfaces 7a, 7b of the web cam 7. A normal vector at a position of the front cam surface 7a corresponding to a bottom dead center is inclined outward in respect to a rotational axis L of the rotary shaft 3. A normal vector at a position of the rear cam surface 7b corresponding to the bottom dead center is also inclined outward in respect to the rotational axis L.</p> |
