Hitachi, Ltd.

Japanese National Railways

Japan National Railway

Hideo Takai

Katsuyuki Terada

Michio Sebata

Isao Okamoto

Kenji Kobayashi

Morishige Hattori

Toshiaki Makino

Yasushi Takano

Motomi Hiraishi

Akiyoshi Iida

Masabumi Oshima

Chisachi Katoo

Toshi Yasui

Hiroshi Higaki

Hiromi Go

Kenjiro Kasai

Tetsuji Hirotsu

Minoru Nakamura

Katsuyuki Iwasaki

Toshihiko Sunaseki

Takao Shozi

Terumichi Muramoto

Kastuyuki Terada

A subframeis connected via a vibration isolatorto a floorof a railway car body, and the subframehas a center pinprotruding downward therefrom and connected to a bogie. The subframeis connected to a coupling device, and is disposed so as to come into contact with stopperson side beamsof the car body. According to this structure, since the coupling deviceis not directly connected to the car body, there is no need to weld a rigid member to the bottom surface of the floor, and the railway car body can be manufactured easily. Moreover, since the subframeis connected to the floorvia a vibration isolator, less noise is transmitted to the car body. Power is transmitted from the coupling deviceor bogieto side beams, so the structure of the car body can be simplified.

Railway car and bogie for railway car

The railway car comprises a subframedisposed below a floor of the car body with a clearance therebetween, and a bogiedisposed below the subframewith a clearance therebetween, wherein car bodyand subframeare connected via a first center pinprotruding downward from car bodyor via a first center pinprotruding upward from subframetoward car body, and subframeand bogieare connected via a second center pinprotruding downward from the subframe. A two-step bumperis disposed between the first center pinand the corresponding adjacent member, and two-step bumperis disposed on both sides of center pinin the width direction of car body. Car bodyswings in the width direction when the bogie passes a point. After passing the point, car bodyreturns to its original position by the force of two-step bumper

Railway car and bogie of railway car

A low noise current collector 20 having excellent controllability and response, and a high speed railway train using such current collectors. The current collector 20 includes an aerodynamically shaped current collector head 22, a driving cylinder 32 to move the current collecting head, a supporting insulator 30, and a cable head 50 supporting a conductor 53 for conducting current from current collecting head 22 to a load. The current collector 20 is controlled by a cylinder 7 for raising and lowering so that the current collector may be contained in a dome 4 when it is in use. A multi-car train has four current collectors, two toward each end, and each current collector has its front side directed toward the center of the train. The two current collectors at the rear of the train are utilized, while the two at the front are contained within their domes 4. Therefore, the train can run in either direction, utilizing the appropriate pair of current collectors.

High speed low noise current collecting equipment and method on

A current collector for a railway trolley vehicle includes a current collecting member having a contact strip, a driving system for moving the current collecting member into and out of contact with a trolley wire, a load cell for detecting force acting between the current collecting member and the driving system, a displacement meter for detecting displacement of the driving system, first and second estimating circuits, and a control circuit. The first estimating circuit provides an estimated value of the contact force between the current collector and the trolley wire by estimating values of first parameters of the contact strip, the current collecting member, and the trolley wire and summing products of each of these values and a corresponding weighting factor. The second estimating circuit provides an estimated value of a disturbance suppressing force by estimating values of second parameters of the contact strip, the current collecting member, and the trolley wire and summing products of each of these values and a corresponding weighting factor. The control circuit calculates a difference force value by subtracting the estimated contact force value and the estimated disturbance suppressing force value from a contact force target value. The control circuit then adjusts a pushing-up force of the driving system on the basis of the calculated force difference value.

The invention relates to a current collector for an electrically powered vehicle. The collector includes a current collecting member which collects current from a current supplying body and conducts the current to a load in the vehicle. The current collecting member is coupled to a driving system through a first insulating element. The driving system moves the current collecting member to the current supplying body. A sensor for controlling the driving system is positioned between the driving system and the insulating element.

A wheelset steering apparatus and method for the truck of railway vehicles, wherein an axle box rotatably provided on the opposite ends of the wheelset is elastically supported in the longitudinal direction as well as in the lateral direction of the truck with respect to a truck frame. Vertical loadings on the truck frame are carried by the axle box. A spring constant in the longitudinal direction of the truck in a state of being elastically supported with respect to the truck frame of the axle box is varied when the vehicle runs. The self-steering property of the wheelset is enhanced, and stability in running on a straight track is secured.

Wheelset steering apparatus and method for the truck of railway vehicles

In a truck for a railway vehicle having a plurality of wheels-and-axles, an arrangement is provided for permitting each wheel-and-axle an optimal steering operation when the truck runs on a curved track, and to simplify the construction of journal box locator. Each journal box is located and fitted to a truck frame by the journal box locator for locating and fitting the journal box to the truck frame in such a fashion that the orbit of movement of the journal box expands upward with respect to the center axis of the truck, and permits the relative displacement between the journal box and the truck frame by elastic deformation of elastic members.

Truck for railway vehicle

A vibration control apparatus for vehicles to be installed on the vehicle wherein a vehicle body is supported on a truck through springs and damping mechanisms, for suppressing the vibrations of the vehicle body and enhancing the riding quality of the vehicle, comprising a vibration detector which detects the vibration of the vehicle body, a compensator circuit which compensates the detection output of the vibration detector and produces a control output for suppressing the vibration of the vehicle body, a fluid operating mechanism which controls the relative displacement between the vehicle body and the truck and which is connected to the vehicle body on one side and to the truck on the other side, a fluid control device which controls the fluid operating mechanism by the use of the control output produced by the compensator circuit, and damping control means to suppress the damping function of the damping mechanism upon sensing the state under which the vibration of the vehicle body is suppressed by the fluid operating mechanism.

Vibration control apparatus for vehicles

This invention relates to a superior suppressing of vibration in a car body when a vehicle runs on a straight railroad and a curvilinear railroad. The invention is comprised of a fluid pressure-acting mechanism arranged between the car body and the truck along with springs for positively controlling a force acting between the car body and the truck with the supplied pressure fluid, an acceleration detector for detecting an acceleration of the car body, and means for determining a displacement generated relatively between the car body and the truck under a steady acceleration acting against the car body. The invention further comprises a controller for receiving a vibration suppressing control signal as a control input representing a result of detection of the acceleration detector, and for receiving a value corresponding to a relative displacement between the car body and the truck contained in the vibration suppressing control signal as a result of the determination from the means for determining a relative displacement between the car body and the truck. The controller subtracts this value from the vibration suppressing controlling signal and outputs it as a control signal. The invention further includes a fluid control unit for controlling a fluid pressure to be supplied to the fluid pressure-acting mechanism with a control signal output by the controller, wherein vibration caused by a relative displacement generated between the car body and the truck with a steady acceleration acting against the car body can be presented to improve driving comfort.

Apparatus for controlling vibration of vehicle

A bogie truck car body support system wherein a car body is directly supported on a truck frame by bolster springs, the system including a link arranged longitudinally of the car body and connected at one end to a link support which is fixed to the car body by a play-free shock absorber and at the other end to a pin through a play-free shock absorber and a bush rotatably fitted on the pin. The car body has neither the bush nor center pin directly connected thereto which might become wobbly. The system can be readily assembled and disassembled and is capable of reducing vibration and noise transmitted from the truck to the car body.

Growing community of inventors

Hikari, Japan

Hideo Takai