RU128139U1 - DEVICE FOR BORING INSERTS OF MOTOR AXIAL BEARINGS OF TRACTION MOTOR MOTOR - Google Patents

Abstract

A device for boring the liners of motor-axial bearings, containing the main drive and feed movement mechanisms and mounted on a traction motor, characterized in that it is equipped with two three-jaw self-centering cartridges, with which it is based on a traction motor, and two tool holders mounted on spline bushings, which are placed on the spindle and connected through connecting mechanisms to the spindles, providing movement of the cutting tool pipe in the direction of feed movement.

Description

The utility model relates to the field of mechanical processing of wear-out parts of the rolling stock of railway transport during the maintenance period in the conditions of repair production and is a prototype of a portable boring machine [1].

Wheel-motor blocks (KMB) during the operation of electric locomotives are subject to significant dynamic loads, especially with axial-axial suspension of the traction electric motor, which accounts for 15-20% of unplanned calls of electric locomotives for repairs due to KMB malfunctions. More than 12% of KMB faults are attributable to motor-axial bearings (MOS), through which the traction motor relies, in one part, on the axis of the wheelset. During operation, wear of the motor-axial bearings is observed both on the inner surface, filled with babbitt and in contact with the axis of the wheelset, and on the outer surface, conjugated with the backbone of the traction motor. To eliminate the above mentioned malfunctions, restoration work is carried out, the essence of which is as follows: remove the old babbitt layer, carry out incoming inspection of the brass shells of the bushings, if necessary, restore the geometric parameters of the shells of the bushing shells, fill the shells of the shells with babbitt and bore the inner surface of the bushing shells in a babbitt layer under the axle of the wheelset.

Currently, a stationary boring machine, type СРС-1, is used to bore MOS liners under the axle of a pair of wheels.

The traction motor when boring the MOS in the babbit is installed on the machine in the assembled form strictly aligned with the armature shaft of the TED along the diameter of the neck of the axle of the wheel pair, taking into account the radial clearance.

The use of this equipment in the implementation of the technological process has the following disadvantage: the process of installing a traction motor on the machine and its alignment along the spindle axes is laborious and significantly reduces the productivity of the operation of boring MOS liners under the axle of the wheelset.

To eliminate the aforementioned drawback, it is proposed to use a device for boring inserts of motor-axial bearings of a traction motor developed at Omsk State University of Railways at the department "Technology of transport engineering and rolling stock repair".

The boring device (Fig. 1) consists of an electric motor 1, gearbox 2, spindles 3, spindles 4, connecting mechanisms 5, spline bushings 6, tool holders 7 and self-centering cartridges 8. When processing the MOS liners, device 1 is installed on the traction motor 2 ( figure 2) and using self-centering cartridges, set along the axis of the motor-axial necks. Then turn on the electric motor 1 (Fig. 1), which transmits the rotation through the gearbox 2, to the spindles 3 and the spindles 4. From the spindles 3, the rotation is transmitted to the toolholders 7 with cutting tools placed in them, providing the main cutting movement. The rotation of the spindles 4 through the connecting mechanisms 5, is converted into the translational movement of the spline bushings 6, on which the toolholders are fixed 7. Thus, the feed of the cutting tool and the processing of the inner surface of the MOS liners along the entire length are ensured. The advantage of this device is mobility and ease of use.

The use of a device for bore liners of motor-axial bearings of a traction electric motor will increase the productivity of the bore of MOS liners by 1.5-2 times by reducing the auxiliary time spent on transporting the TED and installing it on the machine.

List of literary sources

1. Pat. 5939 Russian Federation, IPC В23В 41/08 Portable boring machine / M. M. Yamilev; Applicant and patent holder Open Joint-Stock Company “Institute of Technology and Organization of Production”. - No. 96124102/20; declared 12/24/1996; publ. 02.16.1998.

Claims (1)

A device for boring the liners of motor-axial bearings, containing the main drive and feed movement mechanisms and mounted on a traction motor, characterized in that it is equipped with two three-jaw self-centering cartridges, with which it is based on a traction motor, and two tool holders mounted on spline bushings, which are placed on the spindle and connected through connecting mechanisms with spindles, providing movement of the cutting tool pipe in the direction of feed movement.

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