Doosan Corporation

3optics Co., Ltd.

Dong Ho Han

Dal Sik Jang

Kil Woo Park

Jong Hee Kim

Dong Myung Ham

The present invention is related to a cooling device for a forklift brake system, which is capable of maintaining a predetermined level of heat-radiation performance by reducing heat when heat is generated in a service brake that is provided at a forklift driving shaft. A cooling device for a forklift brake system according to an exemplary embodiment of the present invention allows cooling oil to bypass a cooler when a pressure of the cooling oil is abnormally increased or there is a concern that a pressure of the cooling oil is increased, thereby preventing the cooler from being damaged.

Cooling device for forklift brake system

Glasses for watching stereoscopic images

The present disclosure relates to an energy reclaiming system for an electric forklift truck. The energy reclaiming system includes an electronic device operated by a motor when a working machine is raised and operated by a generator when the working machine is lowered, a hydraulic pump/motor connected to the electronic device and configured to perform two functions of a hydraulic pump and a hydraulic motor, a main control valve unit including a lift cylinder operating unit connected to the hydraulic pump/motor and configured to operate a lift cylinder and a secondary consumer operating unit connected to the hydraulic pump/motor and configured to operate a secondary consumer, and a control lever including a control valve configured to control the lift cylinder or the secondary consumer through the lift cylinder operating unit and the secondary consumer operating unit of the main control valve unit, respectively. The energy reclaiming system includes: a working fluid return line provided with a flow amount limiting valve configured to interrupt a flow of a return flow amount generated by the lift cylinder when the working machine (or fork carriage) is lowered; and an energy reclaiming unit installed in the working fluid return line and configured to, if a return flow amount generated when the working machine is lowered is smaller than a flow amount consumed by the secondary consumer, reclaim the return flow amount to an oil tank, and, if the return flow amount generated when the working machine is lowered is larger than the flow amount consumed by the secondary consumer, guide the return flow amount to the hydraulic pump/motor.

Energy reclaiming system for electric forklift truck

Growing community of inventors

Seoul, South Korea

Dong Ho Han