CZ201796A3 - Drive of a wheel set of a narrow-gauge tram chassis - Google Patents

Abstract

In the case of a wheelset drive for narrow gauge trolleys, particularly designed for a narrow gauge tram vehicle, the bearing housings (4) are located outside the wheelsets (3) with a primary suspension formed by a parallel pair of stack springs (2) arranged one above the other. Outside the frame (1), a drive (5) connected to the frame (1) is provided, which is formed by a traction motor (51) and a gear housing (52). Between the wheelset axle (3) and the outboard side of the output gear (56) of the gearbox (52) there is a connecting shaft (6) which is both gearbox (52) with the wheelset axle (3) and the output gear (56) ) connected by a pair of angularly displaceable connectors (61, 62).

Description

Technical field

The invention is a structural arrangement of the drive of a narrow-gauge traction truck. Its bearing housings are positioned outside the wheelset with a primary suspension made by a parallel pair of leaf spring bundles arranged one above the other. A drive coupled to the frame is formed outside the frame and comprises a traction motor and a gearbox.

BACKGROUND OF THE INVENTION

Lowering the chassis height is necessary for passenger cars, especially for trams. Trams as well as urban vehicles

traffic in general, are designed as low-floor with a minimum height difference between the vehicle floor and the level of the external surface. If the chassis design does not pursue a greater reduction in the walking surface height of the vehicle floor, such arrangements are sufficient. For traction bogies for low-floor vehicles, the location of the drive between the axles appears to be a limiting factor that limits the floor height. Since the secondary suspension is located at the ends of the intermediate cross member, there is still sufficient width for the lowered floor of the vehicle, usually a tram. Height-intensive chassis parts fit into spaces on the sides of the vehicle body, where there is no walkable floor area. For this reason it has adopted a solution where traction drives, usually consisting of an electric motor and a gearbox, are connected to the axles from the outside. In such solutions, the limiting factor is to align the height movement of the bogie frame and the traction drive associated therewith with respect to the fixed axle. Other embodiments require a larger wheelbase i

´ ·· ····? *> ** - * chassis, thus longer chassis frame side members, resulting in increased weight.

SUMMARY OF THE INVENTION

The narrow-track trolley bogie wheel drive system according to the invention is intended, in particular, for a narrow-track tram vehicle whose bearing housings are located outside the wheelset with a primary suspension performed by a parallel pair of leaf spring bundles arranged one above the other. A drive coupled to the frame is formed outside the frame and comprises a traction motor and a gearbox. A propeller shaft is provided between the axle of the wheelset and the remote side of the gearbox output gearwheel, which is angularly coupled to the gearbox axle and the gearbox output gearwheel pair.

• • • · deflection couplings. The flexible suspension by means of a silentblock between the traction motor and the bracket protruding from the frame and the flexible hinge between the gearbox and the cantilever protruding from the frame guarantee adequate independence of the vertical movement of the drive relative to the vertical movement of the bearing housings. Bearing housings with a primary suspension consisting of a pair of parallel leaf springs shorten the overall length of the chassis as the leaf springs protrude from the short side members into which they are fitted. The friction between the leaves of the leaf springs assumes the function of a friction damper, its value has not changed over the years. Such a chassis allows low-floor solutions with a short wheelbase and is therefore suitable for narrow-gauge tram vehicles.

on the drawings

A general view of the design of the narrow-track tramcar bogie wheel drive is shown in Fig. 1 and in detail

Fig. 2 is a cross-sectional view of the transmission of torque from the gearbox to the wheelset.

The wheelset drive according to the invention of the narrow-track traction bogie is intended in particular for a narrow-track tram vehicle. The bearing housings 4 are mounted outside the wheelset 3 with a primary suspension made by a parallel pair of leaf spring bundles 2 arranged one above the other on the bearing housings 4. Outside the frame 1 there is an actuator 5 connected to the frame 1. the motor 51 is provided with a disc brake 55 from the opposite side to the gearbox 52. The flexible suspension of the drive 5 by means of a silentblock 53 between the traction motor 51 and the bracket 12 protruding from the frame 1 and following the use of a pair of angular deflection couplings 61, 62, adequate independence of the vertical movement of the drive 5 relative to the vertical movement of the bearing housings 4. Between the axle of the wheelset 3 and the remote side of the output gear 56the axle of the wheelset 3 and the output gear 56 of the gearbox 52 are connected by a pair of angularly deflectable couplings 61, 62.

The deflection clutch 61 is designed as a toothed clutch 61 with the output gear 56. The propeller shaft 6 is connected to the axle of the wheelset 3 by a deflectable clutch 62 designed as a wedge.

List of reference frames Frame bracket Leaf spring bracket Two-wheel Bearing housing Drive traction motor Gearbox Silentblock Flexible hinge Disc brake Gear Shaft Coupling shaft

61, 62 swiveling couplings

Claims (1)

Claims intended in particular for a narrow-gauge tram vehicle of which:. The bearing housings (4) are mounted outside the wheelset (3) with the primary suspension by a parallel pair of leaf spring bundles (2) arranged one above the other, having a drive (5) mounted outside the frame (1) a frame (1) comprising a traction motor (51) and a gearbox (52), characterized in that between the axle of the wheelset (3) and the remote side of the gearbox output gear (56) ( 52) a connecting shaft (6) is provided which is connected to both the axle of the wheelset (3) and the output gear (56) of the gearbox (52) by a pair of angularly deflectable couplings