What are the differences between the direct slip gear shift and the union sleeve shift in the gear shift commonly used in transmission?
(one of the gears is hollow, usually with needle bearings) on the shaft, and the power connection is completed by a slip union sleeve (involute spline structure).
The gear shifting can be made with a helical gear, and the gear is always in the engaged position
The straight tooth sliding gear shift must be the straight gear engagement, through a slip one of the gear, causes a pair of gears to enter the meshing position.
