Patent ID: 8286523
Filing Date: 2012-10-16
Classification: F16H,Y10T

Abstract:
1. A transmission for a vehicle comprising: a plurality of gear trains for respective speed steps, said speed steps being capable of being selectively established and being accommodated in an engine case; a shift drum having a first axis and being rotatably supported by the engine case to selectively establish the gear trains in accordance with a rotational position of the shift drum itself; shift-position changing-driving means interlocked with and connected to a first end portion of the shift drum for driving the shift drum to rotate, wherein said shift-position changing-driving means includes a shift spindle with an axis parallel with the shift drum, said shift spindle including a first end portion projecting from a shift cover and further including a shift lever operatively connected at the first end portion of the shift spindle; a shift-position sensor for detecting which of the plurality of gear trains is established, said shift-position sensor having a separate axis relative to the first axis and being adjacent to the first end portion of the shift drum; a transmitting mechanism for transmitting a rotational movement of the shift drum, said transmitting mechanism being disposed adjacent to the first end portion of the shift drum and being interlocked with and connected to the first end portion of the shift drum and being configured to transmit the rotational movement of the shift drum while reducing the speed of the rotational movement, said transmitting mechanism includes a drive gear fixed to a shift cam with a first idle gear meshing with the drive gear, a second idle gear that rotates along with the first idle gear and a sector gear meshing with the second idle gear; and a shift rod operatively connected to the shift lever for movement in an axial direction in response to rotational movement of the shift spindle, wherein rotational movement of the shift spindle arm about the shift spindle imparts movement to the shift cam for intermittently imparting movement to the shift drum; said shift-position sensor disposed adjacent to the first end portion of the shift drum is fixed to the outside of the engine case for detecting an acting amount that is transmitted by the transmitting mechanism.