| 摘要 |
PURPOSE:To lessen the restriction in designing installation of a change cam cylinder by coupling pressurizing chambers in front of and behind a pressurizing cylinder with pressure receiving chambers in front of and behind a pressure receiving cylinder through hoses, and turning the change cam cylinder for a certain angle one by one through the swinging action of a swing pinion. CONSTITUTION:Pressurizing chambers 3 are formed on both sides of a plunger 2 of a pressurizing cylinder 1, while pressure receiving chambers 13 are formed on both sides of a pressure receiving plunger 11 of a pressure receiving cylinder 10. The pressurizing chambers 3 are coupled with the pressure receiving chambers 13 through hoses 14. When a change lever 6 is stamped down, the plunger 2 is pulled to cause the oil in the pressurizing chambers 3 to give an oil pressure to the pressure receiving chambers 13 through the hoses 14, which pushes out the pressure receiving plunger 11 to cause a rack 15 to swing a swing pinion 18, and thereby a change cam cylinder 16 is rotated for a certain angle. If this stamping motion of the change lever 6 is repeated, rotation of the change cam cylinder 16 proceeds one by one, and transmission gears are shifted to higher side one by one. Operation of the change lever 6 in the direction of off-stamping, on the contrary, will shift in the direction to lower side. |
