Front loader and working vehicle

Abstract

Included are: a fixing member (boom rotating shaft) fixed to the first member (side frame); a rotating member (sensor stay) relatively rotatable with respect to the fixing member, a portion to be detected (magnet) fixed to one (boom rotating shaft) of the fixing member and the rotating member, a detection unit (sensor body) fixed to the other (sensor stay) of the fixing member and the rotating member and configured to detect a relative rotation angle of the portion to be detected, and an engagement member (detection rod) fixed to the second member (boom) and engaged with the rotating member in a state of allowing movement of the rotating member in an axial direction of a rotating shaft.

What is claimed is: 
     
         1 . A front loader including a first member, and a second member relatively rotatable with respect to the first member about a predetermined rotating shaft, the front loader comprising:
 a fixing member fixed to the first member;   a rotating member relatively rotatable with respect to the fixing member;   a portion to be detected fixed to one of the fixing member and the rotating member;   a detection unit fixed to another of the fixing member and the rotating member and configured to detect a relative rotation angle of the portion to be detected; and   an engagement member fixed to the second member and engaged with the rotating member in a state of allowing movement of the rotating member in an axial direction of the rotating shaft.   
     
     
         2 . The front loader as claimed in  claim 1 , wherein
 an engagement groove extending in a radial direction about the rotating shaft is formed in the rotating member, and   the engagement member is formed in a longitudinal shape extending in the axial direction and is inserted into the engagement groove.   
     
     
         3 . The front loader as claimed in  claim 2 , wherein
 the engagement member is disposed so as to protrude from the rotating member in the axial direction, and   a protruding amount of the engagement member with respect to the rotating member is formed to be larger than a backlash amount between the first member and the second member.   
     
     
         4 . The front loader as claimed in  claim 1 , wherein
 the rotating member includes a fitting portion fitted so as to be relatively rotatable with respect to the fixing member, and   further includes a restriction portion configured to restrict movement of the fitting portion in the axial direction with respect to the fixing member.   
     
     
         5 . The front loader as claimed in  claim 1 , wherein
 the rotating member includes a fitting portion fitted so as to be relatively rotatable with respect to the fixing member, and   at least one of the portion to be detected and the detection unit is accommodated inside the fitting portion.   
     
     
         6 . A working vehicle comprising the front loader as claimed in  claim 1 . 
     
     
         7 . A working vehicle comprising the front loader as claimed in  claim 2 . 
     
     
         8 . A working vehicle comprising the front loader as claimed in  claim 3 . 
     
     
         9 . A working vehicle comprising the front loader as claimed in  claim 4 . 
     
     
         10 . A working vehicle comprising the front loader as claimed in  claim 5 .