| 摘要 |
PROBLEM TO BE SOLVED: To provide a power steering device capable of absorbing a difference in inner wheel when an electric wheelchair turns. SOLUTION: A turning motor and a cam 5 are connected and rotated and the rotation is transmitted to 4a from a toothed pulley 4b through a toothed belt 8 to constituted a means for deflecting front wheels and make angles of left and right front wheels free. Distances between curves of toothed belts 9a and 9b interlocked with a front wheel pulley are set to the same length to use them as a home position for straight running. A connection plate 10, a cam transmission arm 7, and traveling rollers 12a, 12b having free rotation structure for receiving the transmission of the rotation of a cam 5 constituted by transfer toothed pulleys 11a, 11b, 13a, 13b having free rotation structure differing between the right and left between curves of transmitted toothed belts 9a and 9b and the traveling rollers 12a, 12b having free rotation structure and connected by the connection plate 10 by a cam roller through the connection plate 10 pulled by a spring and the cam transmission arm 7 move forward and backward to change distance between curves of the toothed belts 9a and 9b so as to correct a difference in inner wheel of front wheels. |
