US 11,891,290 B2
Hydraulic control system and forklift
Xiaoxiao Dai, Huzhou (CN); and Chunxi Chen, Huzhou (CN)
Assigned to ZHEJIANG JIALIFT WAREHOUSE EQUIPMENT CO., LTD., Huzhou (CN)
Filed by ZHEJIANG JIALIFT WAREHOUSE EQUIPMENT CO., LTD., Zhejiang (CN)
Filed on May 12, 2020, as Appl. No. 15/930,409.
Claims priority of application No. 201910391832.3 (CN), filed on May 13, 2019.
Prior Publication US 2020/0385254 A1, Dec. 10, 2020
Int. Cl. B66F 9/22 (2006.01); B66F 9/12 (2006.01); B66F 9/14 (2006.01); B66F 9/16 (2006.01); B66F 9/20 (2006.01)
CPC B66F 9/22 (2013.01) [B66F 9/122 (2013.01); B66F 9/146 (2013.01); B66F 9/16 (2013.01); B66F 9/205 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A hydraulic control system comprising a hydraulic module, a PLC control module, a hydraulic valve group control module, a manipulation module, and an action module, wherein
the manipulation module is connected with the PLC control module and is configured to input an operation instruction to the PLC control module, wherein the manipulation module includes a forward/backward switch, a tilt switch, a lateral moving switch, and a lift switch;
the PLC control module is respectively connected to the hydraulic module and the hydraulic valve group control module, and is configured to
output a control signal corresponding to the operation instruction to the hydraulic valve group control module, and
control activation of the hydraulic module to provide hydraulic pressure to the hydraulic valve group control module; and
the action module is connected with the hydraulic valve group control module, and is configured to perform an action corresponding to the control signal, wherein the action module includes a forward/backward unit, a tilt unit, a lateral moving unit, and a lift unit; and the forward/backward unit, the tilt unit, the lateral moving unit and the lift unit respectively correspond to the forward/backward switch, the tilt switch, the lateral moving switch and the lift switch, wherein a pulley block is provided on an oil line connection between the hydraulic valve group control module and the lift unit, wherein
the forward/backward unit is configured to receive the control signal from the PLC control module to cause a fork of a forklift to move forward or backward;
the tilt unit is configured to receive the control signal from the PLC control module to cause the fork of the forklift to tilt forward or backward;
the lateral moving unit is configured to receive the control signal from the PLC control module to cause the fork of the forklift to open toward both sides or contract toward the middle; and
the lift unit is configured to receive the control signal of the PLC control module to lift or lower of the fork of the forklift.