US 12,442,155 B2
Wheel loader
Yoko Tsukada, Tokyo (JP); Hidekazu Moriki, Tsuchiura (JP); and Yoshiaki Tsutsumi, Tsuchiura (JP)
Assigned to Hitachi Construction Machinery Co., Ltd., Tokyo (JP)
Appl. No. 18/023,431
Filed by Hitachi Construction Machinery Co., Ltd., Tokyo (JP)
PCT Filed Dec. 17, 2021, PCT No. PCT/JP2021/046800
§ 371(c)(1), (2) Date Feb. 27, 2023,
PCT Pub. No. WO2022/185669, PCT Pub. Date Sep. 9, 2022.
Claims priority of application No. 2021-031953 (JP), filed on Mar. 1, 2021.
Prior Publication US 2023/0304254 A1, Sep. 28, 2023
Int. Cl. E02F 3/43 (2006.01); E02F 3/28 (2006.01); E02F 3/42 (2006.01); E02F 9/22 (2006.01); E02F 9/26 (2006.01)
CPC E02F 3/43 (2013.01) [E02F 3/283 (2013.01); E02F 3/422 (2013.01); E02F 9/2271 (2013.01); E02F 9/26 (2013.01); E02F 9/2228 (2013.01); E02F 9/2285 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A wheel loader comprising:
a vehicle body;
a lift arm provided in the vehicle body so as to be vertically rotatable;
a bucket provided on a tip end side of the lift arm so as to be able to perform dumping or tilting operation;
a drive unit that is provided in the vehicle body and that drives wheels;
a hydraulic actuator including a lift arm cylinder that actuates the lift arm and a bucket cylinder that actuates the bucket;
a pressure sensor that detects a pressure of the hydraulic actuator;
a posture sensor that detects a posture of the bucket;
an external environment recognition sensor that recognizes a target vehicle for loading; and
a controller that controls the hydraulic actuator and the drive unit,
wherein
the controller includes:
a load computing section that computes a load of a target object loaded in the bucket, on the basis of the pressure detected by the pressure sensor;
a loading platform recognition section that recognizes a loading platform of the target vehicle for loading that is detected by the external environment recognition sensor;
a loading position computing section that computes loading sections such that the target object loaded in the bucket is evenly loaded onto the loading platform by sectioning, into a plurality of sections in a traveling direction of the vehicle body, the loading platform of the target vehicle for loading that is recognized by the loading platform recognition section;
a bucket control section that controls a loading quantity for each of the sections such that the target object with a weight equal to the load of the target object divided by a number of sections of the loading platform is loaded for each of the sections on the basis of the load of the target object computed by the load computing section and the sections of the loading platform computed by the loading position computing section; and
a travel control section that controls the drive unit to, when loading the target object to each of the sections of the loading platform is completed, cause the vehicle body to move a distance corresponding to a length of each of the sections of the loading platform on the basis of the sections of the loading platform computed by the loading position computing section.