Patent ID: 7677124
Filing Date: 2010-03-16
Classification: F16H,Y10T

Abstract:
1. A transmission of a vehicle comprising: a plurality of change gears supported by a plurality of gear support shafts, the plurality of gear support shafts having an axial direction; a shift member configured to change an engaged state of the change gears by moving in the axial direction of the gear support shafts; a change drum having a cam groove configured to engage the shift member in an outer peripheral surface thereof and move the shift member in the axial direction of the gear support shafts by rotating at a predetermined angle; a change shaft configured to be rotationally operated at a predetermined angle by a rider; and a change operation force transmitting mechanism configured to transmit the rotation of the change shaft to the change drum, wherein the change operation force transmitting mechanism includes: a driven body configured to integrally rotate with the change drum and having an inner side and a concave portion in an inner peripheral surface thereof; a pole holder arranged in the inner side of the driven body and configured to rotationally reciprocate on the basis of the rotational operation of the change shaft; a pole having a supporting point, being held to the pole holder, and being displaceable around the supporting point between an engaged state in which a leading end of the pole is engaged with the concave portion and a disengaged state in which the leading end is disengaged from the concave portion toward an inner side in a radial direction of the pole holder; an energizing device configured to push the pole to the engaged state; and a limiting device configured to limit displacement of the pole around the supporting point of the pole with respect to the pole holder, wherein the pole has a cross sectional shape, and a base with a cross sectional shape and the cross sectional shape of the base end of the pole is formed in a partially circular shape, a portion of the pole engaged with the concave portion is formed in a semicircular shape, and the base end is rotatable around the supporting point of the pole; and wherein the cross sectional shape of the pole in an axial direction of the pole holder is identical over an entire width of the pole holder and a back surface of the pole with which a push rod is brought into contact is formed in a concaved circular arc shape when viewed from a side of the pole.