CZ306771B6 - Actuation of the bogie, especially for a low-floor rail vehicle - Google Patents

Abstract

With the actuation of the bogie, especially for a low-floor rail vehicle, the traction engine (5), the brake unit (4) and the drive shaft of the traction engine are arranged coaxially, outside the travelling wheels (2). The brake disk (3) is located between the traction engine (5) shield and the disk of the travelling wheel (2), while the brake disk (3) is connected to the disk of the travelling wheel (2) with the connecting pipe (10) and while the traction engine (5) is rigidly mounted on the frame (11) of the bogie, which is placed on the axle housing (1) via the primary springing (12).

Description

Technical field

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to the drive of a bogie with a large construction width between wheels for a low-floor passenger rail vehicle.

BACKGROUND OF THE INVENTION

In the bogies of a low-floor tram vehicle with direct wheel drive, i.e. without a gearbox, as stated, for example, in the Czech patent application CZ-PV-2007-519 A3, the brake unit is currently mounted on the axle and surrounds the trolley. This solution does not make it possible to create a low floor at least 600 mm wide above the end bogie, ie in the standard width, which is given by the general dimensional requirements for low-floor trams. This is due to the fact that the braking unit is mounted on the axle above the wheels, which is advantageous in terms of the axle load itself, but it reduces the space for the interior of the vehicle when the chassis is swiveled under the vehicle body as it passes through the arch.

When swiveling the chassis under the vehicle body, the chassis occupies a certain working space, which is given, inter alia, by the split between the running wheels, the chassis angle and 2k where k is part of the brake unit width from the inner surface of the wheel. cabinets above the chassis. This solution does not, by its very nature, make it possible to create a low floor at the maximum possible width in the area above the outer bogie using standard wheels. This is due to the fact that the braking unit is positioned diagonally above the wheels on the axle, which is advantageous in terms of the axle load itself, but it reduces the space for the vehicle body structure when the chassis is rotated under the vehicle body as it passes through the arch. If the brake unit could be placed outside the wheels, the space for the interior design would be increased and a narrow aisle width of at least 600 mm could be created, the standard width given by the general dimensional requirements for low-floor trams.

Some of these requirements have been met in the solutions disclosed in AT 409 842, EP 609 705 and EP 413 337, but in which the traction motors are part of the unsprung masses of the chassis so that the weight of the traction motors increases the size of the unsprung masses of the whole chassis.

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION It is an object of the present invention to provide a wide-width bogie drive arrangement for articulated low-floor tram vehicles, comprising a brake disc between the traction motor shield and the drive wheel disc, the brake disc being connected to the drive wheel via a connecting tube and the traction motor is further fixed to the bogie frame which is supported on the axle via the primary suspension units.

The drive shaft of the traction motor is disposed within the connecting tube of the brake disc.

The solution according to the invention makes it possible to install a friction-adhesion brake disc between the running wheel and the traction motor and subsequently to attach the brake unit to the traction motor housing, thereby increasing the space for the interior design. Thus, when the chassis is swiveled, the operating space is not reduced, so the 2k measure is not applied here, since the space is limited only by the wheels. This makes it possible to increase the residual free space for the vehicle body structure and thus increase the space for the interior design.

- 1 GB 306771 B6

This arrangement of the axle and the drive is usable precisely thanks to the regulation of the force flows in terms of the required strength of the individual components. It makes it possible to create an aisle with a width of at least 600 mm, ie in the standard width, which is given by the general dimensional requirements for low-floor trams.

A significant technical effect is the distribution of the force flow for driving mode and brake mode, so that in the brake mode the drive shaft and toothed clutches are not stressed by the braking forces that occur between the brake disc and the brake unit. The gripping of the brake unit behind the primary suspension creates a prerequisite for reducing noise when the wheels run over track unevenness.

The technical solution allows better access to the brake unit from outside the vehicle for service and maintenance, as the brake unit has approached the outer contour of the vehicle, reducing repair costs and saving time.

This arrangement of the axle and the drive of the traveling wheel, i.e. the traction motor, the brake disc, the brake unit and the drive shaft of the traction motor, is usable only and by directing the force flows in terms of the required strength of the individual components. From the dimensional and strength point of view, the arrangement according to the invention is optimal.

Clarification of drawings

The solution according to the present invention is illustrated in more detail in the accompanying drawings, in which Fig. 1 shows a construction node of the bogie with drive, bogie frame and axle in axonometric view, and Fig. 2 shows a schematic cross-section through this design node showing mutual arrangement of individual chassis parts.

DETAILED DESCRIPTION OF THE INVENTION

A solution of components for driving a bogie with a large construction width between wheels for a low-floor passenger rail vehicle is shown in Figures 1 and 2. The chain of components is arranged such that when the traction motor 5 exerts the driving force, by means of the drive shaft 8 of the traction motor 5, which passes through the hollow shaft 9 of the traction motor 5 and through the connecting tube 10 of the brake disc 3. When applying the braking force by the brake unit 4 this force is transmitted to the traveling wheel 2 by the connecting tube 10 of the brake disc 3, which surrounds the drive shaft 8 of the traction motor 5.

Thus, the drive shaft 8 of the traction motor 5 and the gear clutch 7 transmits only and only the forces exerted by the traction motor 5, and the coupling tube 10 of the brake disc 3 transmits only the forces exerted on the brake disc 3 by the brake unit 4. which is mounted on the axle 1 via the primary suspension units 12.

Industrial applicability

The bogie drive according to the invention can be used in particular for low-floor rail vehicles, in particular multi-sectional tram vehicles, or even with one vehicle body, with a pivotal bearing of the vehicle body on the bogies.

Claims (2)

PATENT CLAIMS A bogie drive, in particular for a low-floor rail vehicle, wherein the traction motor, the brake unit and the drive shaft of the traction motor are disposed coaxially outside the running wheels, characterized in that between the traction motor shield (5) and the running wheel disc (2) a brake disc (3) is provided, the brake disc (3) being connected to the drive wheel disc (2) by a connecting tube (10), and wherein the traction motor (5) is fixedly mounted on the chassis frame (11), the axle (1) through the primary suspension units (12). Swivel bogie drive, in particular for a low-floor rail vehicle, according to claim 1, characterized in that the drive shaft (8) of the traction motor (5) is arranged inside the connecting tube (10) of the brake disc (3).