| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a two-speed hydraulic motor, in which a two-speed piston is so constituted that a two-speed piston hole is not pushed to cause a low-speed/high-speed switching defective hardly and to cause the wears of the cylindrical face of the two-speed piston and the cylindrical face of the two-speed piston hole hardly.SOLUTION: A two-speed piston 16 of a cylindrical shape for switching the low-speed state and the high-speed state of a hydraulic motor 10 is fitted in a two-speed piston hole part 17 of a casing 13 of the hydraulic motor 10, and the pressure oil acts on the lefthand side end face of the two-speed piston 16 at the time when the hydraulic motor 10 is in the two-speed state, so that a ball 18 contacts the reverse side end face of the two-speed piston 16, and so that the ball 18 has its about one half confined in a swash plate 19. The ball 18 is rotatably press-fitted in the swash plate 19.</p> |
