Work machine

Abstract

An electric shovel as a work machine includes an electric motor, a working portion rotated by the electric motor, and a restricting member that restricts rotation of the working portion.

1 . A work machine comprising:
 an electric motor;   a working portion rotated by the electric motor; and   a restricting member that restricts rotation of the working portion.   
     
     
         2 . The work machine according to  claim 1 , wherein the restricting member includes:
 a first restricting member that restricts rotation of the working portion on one side in a rotation direction; and   a second restricting member that restricts rotation of the working portion on an other side in the rotation direction.   
     
     
         3 . The work machine according to  claim 2 , wherein the working portion includes:
 an arm, and   an attachment rotatably coupled to the arm, and   wherein:
 the attachment includes a coupling portion connected to the arm, and 
 the coupling portion abuts against the restricting member when the attachment is rotated. 
   
     
     
         4 . The work machine according to  claim 3 , wherein the attachment includes:
 an attachment main body portion coupled to the coupling portion; and   a coupling shaft portion coupling the attachment main body portion and the coupling portion, and   wherein:
 the coupling portion abuts against the first restricting member when the attachment is rotated to the one side in the rotation direction, and 
 the coupling shaft portion abuts against the second restricting member when the attachment is rotated to the other side in the rotation direction. 
   
     
     
         5 . The work machine according to  claim 4 , wherein the second restricting member includes a recessed portion against which the coupling shaft portion abuts. 
     
     
         6 . The work machine according to  claim 1 , wherein the restricting member has a planar portion against which the working portion abuts. 
     
     
         7 . The work machine according to  claim 6 , wherein the planar portion is formed of an elastic body. 
     
     
         8 . The work machine according to  claim 1 , comprising:
 a first sensor that detects a rotation angle of the working portion; and   a control device that controls rotation of the electric motor, wherein the control device stops the electric motor when a rotation angle of the working portion is out of a predetermined range before the working portion abuts against the restricting member.   
     
     
         9 . The work machine according to  claim 8 , comprising a second sensor that detects an approach of the working portion to the restricting member,
 wherein the control device stops the electric motor based on a detection result of the second sensor before the working portion abuts against the restricting member.