SU382865A1 - TOROIDAL FRICTIONAL VARIATOR I. F. TELEZHNIKOVA - Google Patents

Description

one

The invention relates to mechanical engineering and, in particular, can be used in machine tools to test abrasive wheels for dynamic strength.

Known toroidal variators with a friction pair of steel-textolite of the TsNIITMASH.4 design, which is based on the Gerdes geometrical scheme.

A feature of the known construction is that a floating frame is inserted into it, on the traverses of which rotating textolite rollers are fixed.

However, in the presence of a floating frame, the rollers in variators of a known construction, such as 7, work with an edge and with different angular velocities. At a concentration of high specific pressures and increased slip, the textolite acquires abrasive properties, which leads to significant wear of both steel cups and textolite rollers. In addition, if there is a floating frame, a cut is formed on the working surface of the rollers (a layer of worked material), causing strong noise and vibration.

The aim of the invention is to increase the rigidity of the friction pair assembly, durability and load capacity.

For this, each roll has a rigid kinematic connection with its corresponding

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the intermediate element, which is mounted in the housing so that it can be rotated about its axis, the centers of curvature of the forming rollers are offset relative to the median plane passing between the plates by 0.1-0.2 mm, and the pivot point of the roller axis lies on the median plane.

The invention is illustrated in the drawings.

FIG. I shows the design of the variator in cross section; in fig. A 2-roller with the center of curvature of the generatrix mixed by 0.1-0.2 mm relative to the plane passing between the cups.

Each textolite roller / (see Fig. 1) is mounted on its axle boxes 2 with semi-axes rotating in ball bearings 3, traverse 4 being bore in the bore 4. Traverse 4 is mounted with its pivots in the variator casing 5.

When the gear ratio is changed, the yoke 4 is rotated relative to its axis of the pivot 6. The six toothed sectors 7 and 5 and the rails of the lever 9 perform the simultaneous rotation of the yokes with textolite rollers.

Subject invention

Toroidal friction variator, comprising a housing and located therein

friction elements interacting with each other, the cups of which are made of steel, and the rollers are made of a textolyte and mounted on intermediate elements, characterized in that, in order to increase rigidity, durability and load capacity, each roller has a hard kinematic connection with its corresponding intermediate element which is installed in the corns with the possibility of rotation about its axis, the centers of curvature of the forming rollers are shifted from the middle plane passing between the cups by 0.1-0.2 mm, and the exact Turning the axis of the roller lies on the middle plane.

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