RU2406632C1 - Traction truck of electric running stock - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: invention relates to rail transport facilities and can be used on whatever rail transport facility. Proposed traction truck comprises frame with two beams each supporting two drive wheels with their drives. Electromagnetic brake shoe with coil are mounted on traction truck by means of two tie rods and two springs. Two driven thrusts are fitted on each lengthwise beam. Said driven thrusts interacts with tie rods to provide in one position, with coil energised, the clearance between the shoe and rail, and, on another position, to allows pressing the shoe to the rail.

EFFECT: higher specific traction.

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Description

The invention relates to rail vehicles and can be used both in railway transport and on tram cars, and on toy railways or rolling stock for them.

Known traction carts of electric trains and tram cars, which are equipped with a rail electromagnetic brake [1]. The specified brake contains a brake pad with an electromagnetic coil, which, when voltage is applied to it, creates an attractive force to the rails, which ensures that the pads are pressed against them and the truck is braked.

Closest to the claimed invention in terms of essential features is the traction car of a tram car model 71-402 manufactured by FSUE Uraltransmash [2]. The indicated trolley has a frame with two longitudinal beams, each of which has two driving wheels fixed by a drive electric motor. A rail electromagnetic brake mounted on each longitudinal beam using two vertically arranged rods and springs, includes a brake pad with an electromagnetic coil. In the idle position, the brake shoe is held by two springs with a gap of approximately 10 mm from the level of the rail head. When voltage is applied to the coil, an electromagnetic attraction force arises, which compresses the springs, and the brake shoe is pressed against the rails, which ensures braking of the truck and the whole car.

The disadvantage of the prototype is the lack of specific traction, because it is limited by the gravity of the car acting on the bogie, and the magnitude of the coefficient of adhesion of the wheels to the rails, and with a sufficiently large drive torque on the drive wheels, they slip.

The problem to which the invention is directed is to increase the specific traction force of the trolley, which will allow the train or tram car to accelerate with great acceleration, overcome steeper slopes, and move without slipping on icy and snowy rails.

The invention consists in the following. On each longitudinal beam of the trolley, two movable stops are additionally installed, which are moved by their drives relative to the longitudinal beam, with the ability to limit the vertical movement of the rail brake shoe to ensure a guaranteed clearance between the shoe surface and the rails. If it is necessary to increase the specific traction force of the trolley, the movable stops from the initial (inoperative) position by their drives move to the operating position, restricting the vertical downward movement of the brake shoe. After that, voltage is applied to the brake shoe coil, an electromagnetic attraction force arises, the brake shoe lowers down to contact with the movable stops, and a gap is maintained between the shoe surface and the rails. Thus, the force of electromagnetic attraction through the movable stops is transmitted to the longitudinal beam and further to the wheels. This increases the total (i.e. taking into account the gravity of the car) pressure of the wheels of the cart on the rails, which allows, with sufficient torque acting from the side of the drive to the wheels, to proportionally increase the specific traction force of the cart.

If it is necessary to brake the trolley, the movable stops with their drives move relative to the longitudinal beam to the initial position, in which they do not prevent the brake shoe from lowering down until it is pressed against the rails.

A new set of structural elements, as well as the presence of connections between them, allows, in particular, due to:

mounted on the longitudinal beams of the traction carriage of the movable stops, to ensure a guaranteed gap between the brake pads and rails when voltage is applied to the coil;

The interaction of brake pads with movable stops and longitudinal beams allows the transmission of electromagnetic attraction forces to the longitudinal beams and to the wheels of the traction trolley.

The invention is illustrated in the drawing, which shows a side view of a traction trolley. The frame of the traction trolley includes two longitudinal beams 1, each of which has two driving wheels 2. The brake shoe 3 of the electromagnetic brake containing the coil, using two rods 4 and two springs 5 is mounted on the longitudinal beam 1, which also contains two movable an emphasis 6 with drives for their movement. The lever 7 connects the brake shoe 3 with the longitudinal beam 1 and serves to transmit the braking force that occurs when the brake shoe 3 is pressed against the surface of the rail 8, on the longitudinal beam 1 and the entire truck.

The functioning of the proposed traction trolley is as follows. In the process of movement of the trolley, the brake shoe 3, through the rods 4, rests on the springs 5 and is held by them with a gap of about 10 mm from the surface of the rail 8, the movable stops 6 are in the initial (inoperative) position. If it is necessary to increase the specific traction force of the truck, the movable stops 6 with their drives move along the longitudinal beam 1 to the working position (as shown in the drawing), in which they limit the lowering of the brake pad 3 and thereby provide a guaranteed clearance between it and the rail 8. After that voltage is applied to the coil of the brake shoe 3, an electromagnetic attraction force arises between the shoe 3 and the rail 8, which is transmitted through the rods 4 to the movable stops 6 and then to the longitudinal beam 1 and wheel 2, which Allows you to increase the specific traction force of the trolley.

If it is necessary to brake the trolley, the movable stops 6 with their drives move relative to the longitudinal beam 1 to the initial position, in which they do not prevent the brake shoe 3 from lowering down until it is pressed against the rail 8. After that, voltage is applied to the brake shoe 3 coil, the electromagnetic attraction force compresses the springs 5 and presses the block 3 against the rail 8, while the lever 7 transmits the braking force to the longitudinal beam 1 and the wheels 2.

Information sources

1. Electrical reference book. In 3 vol. Vol. 3: In 2 kn. Book 2. The use of electrical energy / Under the total. ed. professors MPEI: I.N.Orlova (chap. ed.) and others - 7th ed., rev. and additional - M .: Energoatomizdat, 1988 .-- 616 p.

2. Four-axle passenger tram car model 71-402 "Spectrum". Operating Instructions, Part 1, 71-402.00.00.000 OM, 2001

Claims (1)

Traction trolley of electric rolling stock, including a frame with two longitudinal beams, each of which has two drive wheels with a drive, and using two rods and two springs, an electromagnetic brake block with a coil is installed, characterized in that two longitudinal beams are mounted movable stops with drives, interacting with rods and providing a gap between the block and the rail when applying voltage to the coil in one position, and in the other position, pressing the block against the rail.

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