The connection of the wheels with the axis of the wheels of the vehicles

 

(57) Abstract:

The invention relates to railway transport, in particular to the connection of the wheels to the axle of the wheelset, and can be used to join parts with tightness in mechanical engineering. The connection of the wheels with the axis of the wheels of the vehicles contains associated with tightness of the cylindrical surface of one element of the wheel pair and another element is the axis of the groove with a curved forming paired surfaces of one of the connected elements depth equal to the greatest movement of other associated surfaces of the elastic deformation in the connection. Mentioned grooves wavy closed, opposite the location of the peaks of the waves and the amplitude of each wave is not less than the width of the groove is made by covering the surfaces of the hub of the wheel pair. This increases the load capacity of the connection of the wheels to the axle of the wheelset. 3 Il.

The invention relates to railway transport, in particular to the connection of the wheels to the axle of the wheelset, and can be used to join parts with tightness in mechanical engineering.

You know the connection of the wheels to the axle of the wheel Grooves reduce tension connections in the areas of high stress concentration - at the ends pressed wheels. However, in operation detected cracks in the bottoms of the grooves, due to the stress concentration, the reduction of the diameter axis and a lower quality of hardening of the rolling surfaces of the grooves. These defects lead to failure of the axle (see, for example, Schoolboy L. M. improving the strength of the axles of railway rolling stock. M.: Transport, 1964, S. 51 - 54).

For the prototype accepted connection tightness covering and covered parts that contain grooves with curved forming on one of the mating surfaces of the joints of depth equal to the greatest displacement from the elastic deformation of the other related surface (see patent 2106544, F 16 B 4/00, 1998). Running grooves with curved forming as part toroidal surfaces located symmetrically relative to the longitudinal plane of the mating cylindrical parts, filling them with material after Assembly contributes to the increase of carrying capacity as torque and axial sliding force. The disadvantage of such a device connection is the unidirectionality of curvature of the grooves, which reduces the strength of the press is connected to the extra effort they can change the axial position of the wheels and move the circles skating wheels on invalid distances.

The challenge which seeks the invention is to increase the load capacity of the connection of the wheels to the axle of the wheelset, containing paired with tightness cylindrical surface of one element of the wheel pair and another element is the axis of the groove with a curved forming paired surfaces of one of the connected elements depth equal to the greatest movement of other associated surfaces of the elastic deformation in the connection.

The problem is solved by performing on covering the cylindrical surface of the wheel hubs closed undulating grooves with opposite location of the peaks of the waves, the amplitude of each wave is not less than the width of the groove and a depth equal to the greatest movement of a cylindrical surface the axis of the elastic deformations after mating surfaces of wheel and axle.

The connection includes axle 1 and a pair of wheels 2 and 3, mounted on the wheel seat parts 4 and 5 axis 1 with tension. The landing surface 6 (see Fig. 2) wheel hub contains wavy closed ditches the voltage of the mating surfaces, the number of grooves is not less than two.

The joint Assembly is carried out by press-fitting the wheel hubs on the axle with level control final effort of pressing, recorded by the chart. The result of elastic deformation in the assembled connection covered the surface of the wheel seat parts 4 and 5 axis 1 fill in the grooves on covering surfaces of the hubs of the wheels 2 and 3 (see Fig. 3). Wavy grooves provide discrete stress state of the mating surfaces, the change in the intensity of the connection areas 11 of the location of the grooves. The scale of the waves is not less than the width of the groove provides a discontinuity stresses in any section perpendicular to the axis of the wheel in the area of the wave. Opposite the location of the peaks of the waves creates a wedge effect, which increases with the increase in the amplitude of the wave. It determines the additional component of the clutch cover and the covered surfaces of the connection, thereby increasing the load capacity of the connection of the wheels to the axle of the wheelset.

The proposed technical solution with more durable press connection of the wheels to the axle of the wheelset increases safety and provides increased speed galleriesee associated with tightness of the cylindrical surface of one element of the wheel pair and another element is the axis of the groove with a curved forming paired surfaces of one of the connected elements depth equal to the greatest movement of other associated surfaces of the elastic deformation in the connection, characterized in that the said grooves wavy closed, opposite the location of the peaks of the waves and the amplitude of each wave is not less than the width of the groove is made by covering the surfaces of the hub of the wheel pair.

 

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SUBSTANCE: method comprises steps of separately making metallic convex bottoms with cylindrical collar and backing ring. Thermal expansion factor of backing ring exceeds that of bottoms; outer diameter of backing ring provides close fit of bottoms onto it at 20°C; cooling preliminarily assembled backing ring with bottoms until cryogenic temperature; sliding bottoms on backing ring in cooled state until mutual touch of cylindrical collars of bottoms; heating assembly up to 20°C in order to provide close fit of backing ring in cylindrical collars of bottoms; welding bottoms along butt of assembly and then removing backing ring by chemical milling.

EFFECT: simplified process of making envelopes with enhanced mass characteristics.

2 cl, 4 dwg, 1 ex

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