Railway rolling stock – Trucks – Axle bearing mounting
Reexamination Certificate
1998-11-20
2001-05-15
Morano, S. Joseph (Department: 3617)
Railway rolling stock
Trucks
Axle bearing mounting
C105S003000, C105S004400, C105S096100, C105S175100, C105S199500, C104S032100
Reexamination Certificate
active
06230631
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a single-axle running gear with movable independent wheels for articulated wagons intended for transporting cars and able to run at speeds of 200 km/h. Incorporating running gears of this type on such wagons will make it possible for them to be used for two different track guages.
BACKGROUND OF THE INVENTION
As is known, transporting cars by rail is done with articulated platform wagons which, normally, are designed to run on a single track gauge. Nevertheless, it would be desirable for these wagons to be able to be fitted with single-axle running gears with movable independent wheels and thus to be made able to run on railway networks with two different track gauges.
The problem of constructing running gears with movable independent wheels has already been solved by the applicant, who is the holder of patent FR-A-1, 558, 329, in which are described single-axle bogies with a variable distance between the wheels. In this patent, each set of running gear of the bogie consists of a half-axle, a wheel, two brake discs integral with each other and two axle boxes mounted at both ends of the half-axle, the said axle boxes being fixed in the position corresponding to each track gauge by means of respective locking keys.
SUMMARY OF THE INVENTION
Starting with the bogie described in the abovementioned French patent, and taking account of the particular characteristics of the articulated platform wagons intended for transporting cars, the applicant has developed a single-axle running gear with movable independent wheels which can be fitted to such wagons, incorporated in two trailers which are connected together, so that they can run not just on a single track gauge, but on two different track guages. Moreover, given the characteristics offered by these wagons after they have been equipped with the running gears in accordance with the invention, such as those of making use of independent wheels, not having to withstand heavy loads and being equipped with guidance systems, the said wagons are then able to run at speeds of 200 km/h.
Consequently, the invention provides a single-axle running gear with movable independent wheels for articulated car transporter wagons, this running gear being capable of running on two different track gauges, and including two sets of running gear, each of which comprises a half-axle, a wheel, two brake discs integral with each other and two axle boxes which are mounted at both ends of the half-axle and which are fixed to it in the position corresponding to each track gauge by means of respective locking keys, the said running gear comprising:
a carrying frame in which are incorporated the axle boxes of each set of running gear and the mechanisms necessary for translating and locking the said sets;
suspension springs incorporated in housings in the lateral parts of the carrying frame and provided with vertical dampers mounted inside them;
sliding shoes incorporated in the lateral parts of the carrying frame and intended to support the running gear during the process of changing track gauge;
suspension headers on which the upper parts of the suspension springs bear, and in which the bells of the vertical dampers are fixed;
arms for stabilizing the suspension headers;
hanging suspension links connected at their upper ends to the suspension headers and at their lower ends to corresponding supports integral with the frame of the wagon; and
guidance systems for causing the angle formed by the rim of the wheel and the tangent to a curve of the track to be zero at the point of contact with the track.
According to the invention, each set of running gear carries two locking keys, one for each axle box.
Likewise, according to the invention, the brake of each set of running gear is of the calliper type and comprises a pneumatic actuating cylinder and friction linings which are applied by the said cylinder against half-discs fastened to the web of the corresponding wheel. Both the pneumatic actuating cylinder and the brake calliper with the friction linings are integral with a support which is fixed to the inner axle box of the corresponding wheel and can be moved as a unit with the set of running gear.
The systems for guiding the running gear of the invention will differ according to whether an intermediate running gear or an extreme running gear is involved. Thus, in the case of an intermediate running gear, the guidance system consists of two guidance lever arms fitted in a horizontal position in the carrying frame of the running gear and of two pairs of guide bars which are fixed at one end to the said lever arms and at their other end to the respective adjacent end faces of the two trailers constituting the wagon. In the case of an extreme running gear, the guidance system consists of a control mechanism and of a guidance mechanism proper, of which the guidance mechanism is formed by two lever arms and two pairs of bars which are connected at one end to the said lever arms, the other end of the first pair of said bars being connected to bell cranks which form part of a compensation mechanism, and the other end of the second pair of said bars being connected to a support of the wagon, while the control mechanism consists of two control bars; one of the said ends is connected to the end face of the adjacent trailer and the other end is articulated to corresponding lever arms, adjustable bars being fitted between the said lever arms and the bell cranks of the compensation mechanism, and the longitudinal arms of the said bell cranks being connected together by means of a crossbar which also forms part of the said compensation mechanism.
REFERENCES:
patent: 4480554 (1984-11-01), Brodeur et al.
patent: 4637318 (1987-01-01), Paton
patent: 5001989 (1991-03-01), Mulcahy et al.
patent: 5524552 (1996-06-01), Weber
Aldeanueva Luis Archilla
Frutos Aguado Julio
Jules Frantz
Ladas & Parry
Morano S. Joseph
Patents Talgo S.A.
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