SU1366328A1 - Toothed reduction gear - Google Patents

Abstract

The invention relates to mechanical engineering, in particular to the field of manufacturing gear wheels of medium and high hardness. The purpose of the invention is to expand the technological capabilities of the device due to rolling Novovik 's gears while maintaining the guaranteed difference in the radii of curvature of the normal sections of the adjacent tooth sections of the gear pair. When the shaft 2 rotates, the gears 4 and 5 are driven in with Novikov's gearing. Bearing bearings of shaft 2 are made unregulated by 1 meter, and bearings 6 and 7 of shaft 3 are located in eccentric bushings 8 and 9. To ensure synchronous rotation of eccentric bushings 8 and 9, the gearbox is equipped with a gear train consisting of gear rings, gears on bushings 8 and 9, gears wheels 12 and 13, rigidly mounted on shaft 3, and two two-crowned blocks 10 and 11, freely mounted on shaft 2. The change in center distance by rotating the eccentric bushings causes the movement of the contact point along the height of the tooth and the change pressure angle in engagement. 1 il. with S (L

Description

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The invention relates to mechanical engineering, in particular to the field of manufacturing gear wheels of medium and high hardness.

The purpose of the invention is to expand the technological capabilities of the device due to rolling Novovik 's gears while maintaining the guaranteed difference in the radii of curvature of the normal sections of the adjacent tooth sections of the gear pair.

The drawing is a diagram of the gear for running gears.

In the housing 1 on the shafts 2 and 3 mounted gears A and 5 with Novikov engagement. The bearings of the shaft 2 are made unregulated. The bearings 6 and 7 of the shaft 3 are located in eccentric bushings 8 and 9 installed in the holes of the housing 1 with the possibility of synchronous rotation, and are equipped with gear rings, which engage with the gear units 10 and 11 freely seated on the shaft, meshes with gears 12 and 13, which are rigidly mounted on the shaft 3, are engaged.

The gearbox works as follows.

When the shaft 2 rotates, the gears 4 and 5 are driven in with Novikov's gearing. A shaft 3 rigidly connected to the gear wheel 5 by means of gears 12 and 13 transfers the rotation to freely mounted gear wheels 10 and 11, which cause the eccentric bushings 8 and 9 to rotate. As a result, the center distance changes systematically with a frequency determined by the dependence

 Gp, "- ---,

30 and where n, - the number of revolutions leading

shaft; 2; and - total gear ratio

attitude;

and, - the gear ratio of the driven gear wheels 4 and 5;

Uj - gear ratio of gear elements 12 and 10.13

and 11;

Ug - gear ratio gear elements 10 and 8, 11 and 9.

.

3663282

To prevent rolling-in of specifically interacting tooth areas, it is necessary that the total gear ratio does not equal the whole number and gear ratio of the driven gear wheels U, i.e. and And n and, where n is an integer. Change in center distance

Q by rotating the eccentric sleeves causes the displacement of the point of contact along the height of the tooth and a change in the pressure angle in the engagement. In the presence of errors in the center distance

15, the magnitude of the difference in the radii of curvature of the normal sections of the adjacent tooth portions has a significant effect on the change in the pressure angle in the gear. Moreover, since

The 20th gear with Novikov's gearing is sensitive to a change in the center distance, and this factor is positive when teeth are broken in, a regular change in the axial spacing causes the displacement of the contact point along the height of the tooth, which is accompanied by uniform wear of the tooth. Thus, the difference in the radii of curvature of the normal sections of the mating parts of the gear and wheel teeth is maintained.

Thus, the design of the gearbox for running gear

35 wheels allows to maintain the difference in the radii of curvature, the normal sections of the adjacent tooth sections, provided for by the initial contour, during running-in and to eliminate the adverse effect

40 errors of real gear Novikov on its load capacity and reliability.

Claims (1)

Invention Formula A gear reducer, in the casing of which the gears are rigidly mounted on shafts housed in bearing supports, while the bearings of one of the shafts are mounted in eccentric bushings, characterized in that, in order to expand the technological capabilities by rolling Novikov gears in a condition of guaranteed maintenance difference of the radii of curvature of the normal sections of the mating sections of the teeth of the gear pair, the gearbox is equipped with a kinematic connection 1366328 eccentric bushings with a shaft among the wheels rigidly mounted on the shaft by means of a gear, which is coaxial to the bushings, and two two-curl gears made of blocks, freely mounted on eccentric bushings, gears to the second shaft of the gearbox.