| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic infinite variable-speed drive capable of reducing operation noise.SOLUTION: A hydraulic infinite variable-speed drive 1 is provided with gear changing means 1a which includes: a housing 4 for rotatably supporting an input shaft 2; a plunger block 7 to be rotated integrally with the input shaft 2; an input side plunger 8 to be inserted into an input side plunger hole 31; a swash plate 6 forming a swash plate face 6a on which the input side plunger 8 is abutted and capable of obtaining a transmission gear ratio by changing an inclination angle of the swash plate face 6a; an input side timing spool 9 to be inserted into an input side timing spool hole 32; and an input side spool cam 37 forming an input side spool cam groove 37a with which the input side timing spool 9 is engaged and attached to the housing 4. By rotating the input side spool cam 37 in a peripheral direction of the input shaft 2, a position of the input side timing spool 9 against the housing 4 can be changed. |
