| 摘要 |
PROBLEM TO BE SOLVED: To provide a static hydraulic infinite variable-speed drive having a simple structure and capable of easily changing a biasing force of a neutral biasing mechanism for returning a swash plate to the neutral position.SOLUTION: A neutral biasing mechanism 25 comprises a first turning arm 26 integrally attached to a trunnion shaft 24 and having a cam part 29 reentrant toward the trunnion shaft 24 side formed; a second turning arm 27 rotated around an oscillating shaft 32 in parallel with the trunnion shaft 24; a roller 28 rotatably supported at the second turning arm 27 and fitted into the cam part 29 to cause the first turning arm 26 to rotate in a neutral attitude N2 corresponding to a neutral position N1 of a swash plate 23; and two springs 40 and 41 attached to the second turning arm 27 and a fitting member 20 so as to bias the second turning arm 27 in such a way that the roller 28 may be fitted to the cam part 29. A biasing force of the second spring 41 of the two springs 40 and 41 can be changed.SELECTED DRAWING: Figure 3 |
