| 摘要 |
CONSTANT-MESH TRANSMISSION WITH A CHAIN DRIVE AND DOUBLE DISCONNECT REVERSE The constant-mesh transmission (10) includes a gear case (12), an input shaft (14), a counter shaft (16) and an output shaft (18). An input drive gear (22) integral with the input shaft (14) meshes with the counter shaft drive gear (44). First, second and third speed counter shaft gears (46, 48 and 50) are integral with the counter shaft (16). A fifth speed counter shaft gear (52) and a counter shaft sprocket (76) are journaled on the counter shaft. First, second and third speed driven gears (54, 58 and 62) are journaled on the output shaft (18) and in mesh with the first, second and third speed counter shaft gears. A reverse driven sprocket (7a) is journaled on the output shaft. A fifth speed output shaft gear (66) is secured to the output shaft (18). A chain (80) is trained around the sprockets (76 and 78). Clutch assemblies (70, 72 and 82) are mounted on the output shaft (18) and clutch (74) is mounted on the counter shaft. The clutch (70) locks gears (54 or 58) to the output shaft (18) for first and second speed. The clutch (72) locks a gear (62) to the output shaft for third speed or locks the input shaft (14) to the output shaft (18) for fourth speed. The clutch (74) locks gear (52) to the counter shaft (16) for fifth gear or locks drive sprocket (76) to the counter shaft (16). The clutch (82) locks driven sprocket (78) to the output shaft (18). A shift fork (132) simultaneously locks sprocket (76) to the counter shaft (16) and locks sprocket (78) to the output shaft (18) to drive the output shaft in a reverse direction from the input shaft rotation. Some of the clutches include synchronizers. |
