Hitachi Construction Machinery Co., Ltd.

Central Japan Railway Company

Hitachi Power Solutions Co., Ltd.

Toshio Shikama

Shinji Akino

Hiroyuki Kanazawa

Isao Naruse

Yasuki Nakakura

Junichi Fujiwara

Kenichi Kitazawa

Fumio Okimoto

Yasutaka Terada

Nobuo Yamanaka

A pantograph device of a trolley-type truck includes: a base frame; a bottom frame rockably attached to the base frame; a top frame rockably attached to the vicinity of the top end portion of the bottom frame through a connecting shaft; a collector shoe rockably supported in proximity to the top end portion of the top frame; a hydraulic cylinder for raising and lowering the bottom frame, attached to the base frame; and a spring which acts so as to rotate the top frame upward through the connecting shaft. By erecting the bottom frame by the hydraulic cylinder, the tensile force produced in the spring is increased and the top frame is rotated upward through the connecting shaft. This makes it possible to obtain a wide movable range without use of a long and strong spring and enhance the followability to overhead wires without increasing pressing force.

Pantograph device of trolley truck

An object of the present invention is to realize a structure able to well retain contact performance between an overhead line and a slider, across the entire lengthwise direction of the slider. The sliderformed of slider elementsanddivided in the crosswise direction of a vehicle, is supported on the upper surface of a slider support body. A center support memberforming the slider support bodyis elastically deformed downward in a concaved shape across the longitudinal direction, due to a load applied due to contact between the overhead lines and the slider. Also, together with this, both ends of the center support memberare supported on a shoe bodyso as to allow free oscillation via the respective end section support members. As a result, even if the overhead lines are positioned on both of the end sections in the lengthwise direction of this slider, the slideris able to track the movement of the overhead lines due to elastic deformation of the center support memberand to the rising and falling of the center support member, and hence the above object can be achieved.

Collector shoe device

Growing community of inventors

Sayama, Japan

Toshio Shikama