Hitachi, Ltd.

Japanese National Railways

Michio Sebata

Hideo Takai

Toshiaki Makino

Katsuyuki Terada

Kenji Kobayashi

Morishige Hattori

Yasushi Takano

Akiyoshi Iida

Masabumi Oshima

Chisachi Katoo

Toshi Yasui

Hiroshi Higaki

Motomi Hiraishi

Isao Okamoto

Minoru Nakamura

Hiromi Go

Terumichi Muramoto

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

On an outer periphery of a link for connecting a member car body and a bogie car frame vessel is provided and into which particle shaped members are inserted. A rotation vibration generated from a drive system of a running electric motor a transmission apparatus and a shaft coupling is transmitted to the link The vibration energy generated at link is converted to the kinetic energy in response to the collision of the particle-shaped members contained in the vessel so that the vibration at the link is reduced. Accordingly, the propagation of the vibration to a car body can be restrained. The particle-shaped members can be inserted into a cylindrical portion of the link Further, the particle-shaped members can be inserted movably into a column In a railway vehicle having a bogie car, the vibration caused by the unbalance of the drive system can be restrained and the noise in a car accompanied with the vibration can be reduced.

Railway vehicle

A traction link of a bogie frame is connected to a connection member which extends down from a car body. In an interior portion of the connection member, a large number of particle-shaped members are accommodated. The rotation vibrations which are generated from a system drive of a running electric motor, a reduction gear unit and a shaft coupling are transmitted to the connection member and the car body through the traction link. The vibration energy generated in the connection member is converted to kinetic energy in the particle-shaped members by collisions between the particle-shaped members inside the connection member and, so that the vibrations in the connection member can be reduced. Accordingly, the propagation of the vibrations to the car body can be restrained. In a railway vehicle bogie car, the vibrations which are generated by an unbalance of the drive system can be restrained, and the noise inside the car produced by the vibrations can be reduced.

Railway vehicle and railway vehicle use bogie 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

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.

Growing community of inventors

Kudamatsu, Japan

Michio Sebata