| 摘要 |
1480962 Change-speed gear KLOCKNERHUMBOLDT-DEUTZ AG 28 Jan 1975 [2 Feb 1974] 3668/75 Heading F2D A change-speed gear for a vehicle comprises an auxiliary gear-box 4 providing two forward speeds and one reverse depending on the engagement of three friction clutches 29, 17, 22 the input members of which 1, 15 are permanently connected to the input 1 of the gear-box, this gear-box 4 being located ahead of further gears 5, 6. The auxiliary gear-box 4 provides direct drive from an input flywheel 1 to an output shaft 21 with clutch 29 engaged, provides a lower ratio through gear-wheels 12, 13, 18 and 20 with clutch 17 engaged and provides reverse through gears 23, 26 and 27 with clutch 22 engaged. Clutches 17 and 22 are parts of a double clutch 16, and may be multiplate fluid-pressure operated clutches. The use of friction clutches allows reverse to be directly engaged under load. A main gear-box 5 in series with gear-box 4 has shaft 21 as its input shaft, a layshaft 31 being provided with gear-wheels 33, 34 and 35 meshing with gear-wheels 36, 38 and 39 which can be selectively clutched to the output shaft 30 to provide three forward ratios. A fourth ratio is obtained by clutching input shaft 21 to output shaft 30. The layshaft 31 is driven through gear-wheels 27, 32 from input shaft 21. A supplementary gear-box 6 in series with gear-box 5 has an output shaft 42 driven from the output shaft 30 of gear-box 5 through one of the three gear pairs 41, 43, 45, 46 and 47, 48 depending on the engagement of clutches 44, 49. A creep speed is also available with a clutch 57 engaged, when drive is through gears 47, 48, 51, 52, 55 and 56, with gears 52 and 55 being on a layshaft 53. The output shaft 42 drives wheels 11 through a differential 8, reduction gearing 9 and half-shafts 10. A further output from shaft 42 may be taken from a gear-wheel 58. Power take-off is from a shaft 25 driven through gear-wheels 12 and 60 from the input shaft 2 of gear-box 4. A first power take-off is from gears 62 or 63 to drive, e.g. an auxiliary pump or a compressor, and a further power take-off is from a shaft 74 driven by either a gear 73 or a gear 75, which gears are driven in turn from a shaft 66 through a clutch 69, shaft 66 being driven by shaft 25 through gears 64, 65. The take-off shaft 74 is driven at one of two speeds depending on the engagement of a clutch 76. |
