| 摘要 |
A combination creeper gear and control system for a transmission is disclosed having a range selector gear followed by a change speed gear. The combination includes an engine-driven drive shaft connected through a creeper gear mechanism to an input shaft which extends into the transmission. The creeper mechanism includes a drive gear mounted on the drive shaft, a driven gear mounted on the input shaft and a lay shaft aligned parallel to both the drive shaft and the input shaft. The lay shaft supports a compound gear which includes a first and a second gear, wherein the first gear meshes with the drive gear and the second gear meshes with the driven gear. The combination further includes a synchronizer located between the drive gear and driven gear which is selectively engageable between a direct mode and a creep mode. In the direct mode, the drive shaft is directly connected to the input shaft, while in the creep mode, the drive shaft is connected to the input shaft by way of the compound gear. The creeper mechanism is activated by a selector control which consists of a first and a second shift rod and a locking pin movably positioned between the two shift rods. The first shift rod is associated with the creeper gear mechanism while the second shift rod is associated with the range selector gear. The locking pin controls the movement of the first and second shift rods such that the creep mode cannot be selected when the range selector gear is in a high speed range, but which can be selected in either a forward or reverse low-speed range. |
