Abstract: A subframe 50 is connected via a vibration isolator 40 to a floor 11 of a railway car body 10, and the subframe 50 has a center pin 60 protruding downward therefrom and connected to a bogie 30. The subframe 50 is connected to a coupling device 70, and is disposed so as to come into contact with stoppers 13 on side beams 12 of the car body 10. According to this structure, since the coupling device 70 is not directly connected to the car body, there is no need to weld a rigid member to the bottom surface of the floor 11, and the railway car body can be manufactured easily. Moreover, since the subframe 50 is connected to the floor 11 via a vibration isolator, less noise is transmitted to the car body. Power is transmitted from the coupling device 70 or bogie 30 to side beams, so the structure of the car body can be simplified.

Abstract: The object of the present invention is to provide an axle box suspension for a railway car with a simple structure to fix coil springs and support rubbers, and enabling easy mounting operation. Coil springs 21 and 22 are disposed on top of an axle box 10. Support rubbers 30 are disposed on front and rear portions of the axle box 10 with respect to the traveling direction of the railway car. A support shaft 31 is disposed at the axial center position of the support rubber 30, and the upper end of the support shaft 31 is passed through the side beam 6. The upper end of the support shaft 31 protruding from the upper surface of the side beam 6 is fixed via a nut. The operation of fixing the support shaft 31 to the side beam 6 by tightening the nut 40 can be performed at the upper surface area of the side beam 6, so the operation is facilitated.

Abstract: A subframe 50 is connected via a vibration isolator 40 to a floor 11 of a railway car body 10, and the subframe 50 has a center pin 60 protruding downward therefrom and connected to a bogie 30. The subframe 50 is connected to a coupling device 70, and is disposed so as to come into contact with stoppers 13 on side beams 12 of the car body 10. According to this structure, since the coupling device 70 is not directly connected to the car body, there is no need to weld a rigid member to the bottom surface of the floor 11, and the railway car body can be manufactured easily. Moreover, since the subframe 50 is connected to the floor 11 via a vibration isolator, less noise is transmitted to the car body. Power is transmitted from the coupling device 70 or bogie 30 to side beams, so the structure of the car body can be simplified.

Abstract: At one end in a running direction of a bogie, two guiding wheels are arranged, and at another end in the running direction of the bogie, two stabilizing wheels are arranged. The stabilizing wheels are positioned at a level lower than that of the guiding wheels. The stabilizing wheels function to guide the bogie along the monorail and prevent the bogie from falling off the track. With this arrangement, the total number of guiding wheels and stabilizing wheels can be reduced, and particularly, the number of the guiding wheels can be reduced. Accordingly, the bogie can be manufactured with a low cost. A traction link for connecting the bogie and the car body is arranged on one end of the bogie, and, accordingly the length of the bogie can be shortened.

Abstract: On an outer periphery of a link 30 for connecting a member car body 20 and a bogie car frame 11, vessel is provided and 42 into which particle shaped members 41 are inserted. A rotation vibration generated from a drive system of a running electric motor 14, a transmission apparatus and a shaft coupling is transmitted to the link 30. The vibration energy generated at link 30 is converted to the kinetic energy in response to the collision of the particle-shaped members 41 contained in the vessel 42 so that the vibration at the link 30 is reduced. Accordingly, the propagation of the vibration to a car body can be restrained. The particle-shaped members 41 can be inserted into a cylindrical portion 31 of the link 30. Further, the particle-shaped members 41 can be inserted movably into a column 32. 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.

Abstract: 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.

Abstract: One end of a running direction of a bogie, two guiding wheels are arranged, another end of the running direction of the bogie, two stabilizing wheels are arranged. The stabilizing wheel is positioned in a lower portion of the guiding wheel. The stabilizing wheel has a function for guiding the bogie along to the monorail and a function for presenting a falling of the bogie. A total number of the guiding wheels and the stabilizing wheels can be lessened, in particularly a number of the guiding wheels can be lessened, and accordingly the bogie can be manufactured with a low cost. A traction link for connecting the bogie and the car body is arranged on one end of the bogie, and accordingly a length of the bogie can be shortened.

Abstract: 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.

Abstract: 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.