| 摘要 |
1,122,711. Change-speed and reverse gear; change-speed control. DEERE & CO. 15 Sept., 1965 [15 Sept., 1964], No. 39481/65. Heading F2D. A vehicle transmission comprises input, counter, intermediate and output shafts A, B, C, D, the axes of shafts B, C, D passing the corners of a triangle; of the gears 36, 38, 40, 42 fast with shaft C, the gear 36 permanently meshes a reverse gear 48 rotatable relative to shaft D; and members 52, 54 are splined to shaft D and movable to connect gears 48 or 38 or 40 or 42 to shaft D to produce eight forward ratios and four reverse ratios. Shaft C can be driven direct from shaft A via gear 60, clutch 64 and gear 62 for the high forward ratios or via gears 58, 68, shaft B, slidable element 70 and gear 38 for the low ratios; for reverse ratios the element 70 engages reverse gear 48. Clutch 64 can engage fixed teeth 80 only when a gear ratio is established for a parking lock. Shaft A is driven from engine crank-shaft 12 through clutch 14, 16 and a two-speed power-take-off is driven via clutch 14, 18, shaft 22 and gears 24, 26, 28, 30. The transmission is controlled by two levers, each operating two rods, Fig. 4 (not shown), one lever controlling the establishment of the high, low, reverse ranges and park by moving element 70 and clutch 64 and the other lever moves elements 52, 54 to establish the different speed ratios. Each rod has a member to locate it in a desired position and the rods are interlocked, whereby one rod of each pair can only be moved when the other is in neutral. Also the rods are interlocked so that parking lock can only be established when a gear ratio is established. |
