Patent ID: 9664255
Date: 2017-05-30
CPC Classifications: F16H,Y10T

Claim:
1. A power unit for a saddle vehicle wherein: gear trains of a plurality of shift stages one of which is selectively established according to rotation of a shift drum are provided in a power train system between a drive source that exerts a driving force and a drive wheel; a change mechanism that rotates the shift drum includes a shift spindle that rotates according to input of a gear shifting operating force and a shift arm that engages with a locking pin provided on a side of the shift drum and is fixed to the shift spindle; and a detection shaft of a shift position sensor for detecting a rotational position of the shift drum is interlocked and connected with the shift drum; the power unit for a saddle vehicle comprising: an interlocking shaft for interlocking and connecting the detection shaft of the shift position sensor is connected to the shift drum in such a manner so as to be coaxial with a rotational axis line of the shift drum and is incapable of rotation relative to the shift drum; in the shift arm, an engagement hole is formed having an elongate hole shape extending along one diameter line of the shift spindle in such a manner so as to allow insertion and engagement of the locking pin and an insertion hole is formed extending into an arc shape centered at a center axis line of the shift spindle in such a manner so as to allow insertion of the interlocking shaft; at least a part penetrating through the insertion hole in the interlocking shaft is formed with a diameter smaller than a diameter of the locking pin and a width of the insertion hole is set smaller than a width of the engagement hole; and a second engagement pin, fitted into an engagement recess, is formed at an end part of a joint component on the side of the shift position sensor and is located on one diameter line of the joint component said second engagement pin is provided in parallel to a first engagement pin fitted into the engagement groove provided on the joint component connected to the detection shaft in such a manner so as to be incapable of rotation relative to the detection shaft.