| 摘要 |
1,189,488. Variable speed gearing. CITROEN S.A. (Automobiles Citroen, Berliet, Panhard). 22 June, 1967 [27 June, 1966], No. 28957/67. Heading F2D. A variable speed gear comprises a hydrodynamic torque converter 101 having its output member connected to the input shaft 105 of a mechanical continuously variable speed gear 102, the ranges of reduction ratio D c , D v of the torque converter and mechanical gear respectively being such that the values of ratio D v /D c at the extremes of the range of overall ratio lie between 0.6 and 1.5. As shown, a separating clutch 123 is included between the torque converter output and the input of the mechanical gear 102. For forward drive, a double clutch 124 connects the input shaft 105 to a shaft 106 driving a primary shaft 108 via gears 107. The gear 102 includes two similar interpenetrating disc stages in series. Shaft 108 carries friction discs 109 interleaved between rings 110 splined to a casing 111 which in turn is splined to a shaft 112 carrying friction discs 109 interleaved with a second set of rings 110 splined in a ring 113 which is splined to an output shaft 118. Casing 111 and shaft 112 are rotatably mounted in an arm 122 pivoted at 117 to the gear housing. To vary the ratio of gear 102 the arm 122 is pivoted in one or other direction by opposed fluid actuated rams 116. For reverse, a pinion is clutched to shaft 105 by clutch 124 to drive the output shaft 118 directly through meshed gears (119), (Fig. 4, not shown), the friction gearing being bypassed. In Fig. 2 (not shown), a torque converter (1) drives a toric disc type of continuously variable speed gear (2), the inclination of two sets of idler rollers (11, 12) being adjustable in unison to vary the gear ratio. |
