RU27658U1 - CLUTCH FIST - Google Patents

Description

Ml-F16D 4/48

Gimbal cam

f fcTif f-tta

The invention relates to motor cars of electric trains and subways.

The electric motors of motor cars are connected to gearboxes that transmit torque to the wheelsets using a cardan coupling. One of the critical components of the universal joint coupling is the cam.

Known cam device for cardan clutch, drawing I 2.7020.31.53.055.10Р1СБ, manufactured by the Mytishchi Engineering Plant.

The disadvantages of the design of the camshaft cam indicated are that there are three repair options for extending the life of the cam, which is under the influence of shock-dynamic loads, as the cam pin, needle rollers and bearing holder are worked out. At the same time, the cam trunnions are shlifzgut, replace the bearings and needle rollers, putting them larger, taking into account the wear of the cam trunnions. By grinding the trunnions, it is not always possible to remove the layer with scuffs and dents.

The objective of the invention is to extend the life of the cam of the cardan clutch. The technical result is the reduction of material costs for the manufacture of cams of cardan couplings, the reduction of their accidental repair on rolling stock.

The technical result is achieved by the fact that in the cam device of a cardan coupling containing a cam with trunnions for bearings, a bearing race, needle rollers, a washer, a cap, a screw, a grover washer in the repair version, the cam trunnion diameter is reduced by 0.858 from the original, and used to restore the trunnion diameter bushings of the same material as the cam with a centered outer surface that are worn when heated.

In FIG. 1. The cam of the cardan clutch adopted as a prototype is shown. The diagram shows: 1-cam of the cardan clutch, 2- bearing cage, 3-needle roller, 4-washer, 5-cap, 6-screw, 7-washer Grover.

In FIG. 3 shows the installation diagram of the sleeve in the repair version of the cam.

In FIG. 4 shows a diagram of a cardan coupling. The diagram shows: 1-shaft of the electric motor, 2-shaft of the gearbox, 3- cam of the cardan coupling, 4-fork of the cardan coupling.

During the repair work of the cam, three repair options provided by the drawings are first used. However, when operating the cams of the cardan couplings, it is often impossible to carry out any repair option by grinding the trunnions. After polishing, dents remain, scoring to a depth greater than that provided by the third repair option.

To extend the life of the cam use the device of the invention. The cam pin is extended to a diameter of 0.858d and a sleeve is put on it in the heated state (Fig. 2,3). In subsequent repairs, the sleeve is heated by inductive current and removed. A new bushing is put on its place in the heated state. The quality of the repair options depends on the loading cycles and the fatigue strength of the modified trunnions.

Cardan coupling works as follows. Rotation from the electric motor 1 is transmitted to the cam 3 connected to the plug 4 of the electric motor. The fork 4 of the gearbox engages with the cam of the gearbox 2. There are gaps between the cam 3 and the fork 4. When transmitting torque, the cam bearings experience shock-dynamic loads.

As practice has shown, the life of the cams due to the use of the sleeve is increased by about 2 times.

Authors / 5 5 2 ::: - -M.V.Bibanov

L.L. Ponomarev

Claims (1)

A cardan coupling cam containing a cam with trunnions for bearings, a bearing race, needle rollers, a washer, a cap, a screw, a grover washer, characterized in that in the repair case, the cam trunnion diameter is reduced by 0.858 from the original, and bushings of that type are used to restore the trunnion diameter the same material as the cam with a cemented outer surface that is worn when heated.