Railway rolling stock – Locomotives – Gripping drivers
Patent
1992-10-23
1994-06-28
Oberleitner, Robert J.
Railway rolling stock
Locomotives
Gripping drivers
1051991, 1051992, B61C 1100
Patent
active
053237102
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to an arrangement intended for driving a trackbound traction vehicle with carriages coupled thereto and with track inclinations of up to 1:4, and particularly to a drive arrangement which is self-adjusting in both the forward and rearward directions.
The Swedish Patent Application No. 8700667-2 teaches an arrangement of a similar kind intended for driving a trackbound traction unit with carriages at such track inclinations, although this arrangement is only self-adjusting in the forward direction of the traction unit. Consequently, when this known traction unit is driven in reverse, the drive wheels and the center rail of the drive arrangement are subjected to considerable wear and the pressure and/or driving force exerted by the drive wheels of the arrangement is reduced, and the risk of the traction unit being derailed is increased when, for instance, there is a fault in the tracks or rails or when the center rail of the drive arrangement is warped or twisted.
SUMMARY OF THE INVENTION
The object of the present invention is to provide an arrangement for driving a trackbound traction unit which is self-adjusting in both the forward and rearward direction of movement, thereby to overcome the drawbacks of known arrangements of this kind when driving the traction unit in reverse.
BRIEF DESCRIPTION OF THE DRAWING
The invention will now be described in more detail with reference to an exemplifying, preferred embodiment thereof and with reference to the accompanying drawings, in which:
FIG. 1 is a longitudinal sectional view of a trackbound traction unit provided with a drive arrangement provided in accordance with principles of the present invention, this view being taken on the line A--A of FIG. 2;
FIG. 2 is a top plan view of the traction unit shown in FIG. 1;
FIG. 3 is a cross-sectional view of the traction unit and drive arrangement, taken on the line B--B of FIG. 1; and
FIGS. 4 and 5 are respectively a side view and an end view of the drive arrangement with the drive wheels inclined in two mutually perpendicular vertical planes in relation to the track plane.
DETAILED DESCRIPTION
As will be seen from the drawings and from FIGS. 1, 2 and 3 in particular, the illustrated embodiment of the drive arrangement of the present invention includes, in a known manner, at least two drive wheels 1 with associated transmissions 2, two carrier arms 3 which extend substantially parallel with the length direction of the traction unit and at one end of which drive wheels are journalled, a holder 4 in which the other end of the carrier arms is pivotally mounted by means of spherical bearings 5, a hydraulic clamping piston-cylinder device 6 which is connected to the firstmentioned ends of said carrier arms, and a rail 7 which is fixedly mounted on the supporting surface in the center of the track. The carrier arms 3 are substantially perpendicular to the geometric axes of respective drive wheels 1 and are intended to pivot the drive wheels 1 into pressured abutment with the center rail 7, through the medium of the hydraulic piston-cylinder device 6. The drive arrangement of the invention also includes a frame R of substantially elongated rectangular configuration.
The holder 4 projects from the left short side (FIG. 2) of the frame and the frame is suspended from the chassis U of the trackbound traction unit by four resilient articulated piston-cylinder devices FO which are pivotally journalled at the top and at the bottom thereof by means of, e.g., spherical bearings, and which are attached to the chassis and to the frame at respective attachment points F1 and F2. Alternatively, the frame can be suspended from the chassis in telescopic rods sprung with the aid of springs.
The articulated piston-cylinder device FO are connected to a source of hydraulic pressure which is adapted so as to balance the frame R and hold the frame positioned substantially in a horizontal plane. The frame together with associated components will then behave as though it were weightl
REFERENCES:
patent: 645648 (1900-03-01), Morgan
patent: 720291 (1903-02-01), Smith
patent: 2310223 (1943-04-01), Cheneau
patent: 3240291 (1966-03-01), Bingham
patent: 3456597 (1969-07-01), Jackson
patent: 3673966 (1972-07-01), Wilson
Morano S. Joseph
Oberleitner Robert J.
Svenska Kraftbyggarna Entreprenad AB
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