RU2600363C1 - Gear wheel - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to machine building and can be used in heavily loaded tooth gears subjected to impact loads. Gear wheel comprises a body, a toothed rim with teeth of height and a pair of flat ring pads of width a secured on the teeth ends. Pads sections adjacent to the teeth ends and fixed on them are shifted radially relative to the teeth vertices towards the wheel center. Sections of the pads located between adjacent teeth have the outer profile curvature larger than the curvature of the circle, in which the outer sides of the pads sections fixed on the teeth ends are fit. Curvature of the outer profile of the plates sections arranged between adjacent teeth is equidistant to the curvature of their outer profile.

EFFECT: provided is higher reliability of the gear wheel.

1 cl, 2 dwg

Description

The invention relates to mechanical engineering, in particular to machine parts, and can be used in heavily loaded gears subject to shock loads.

Known gear wheel containing the body and the ring gear with teeth - see, for example, "General technical reference book / Ed. E.A. Skorokhodova - 2nd ed., Revised. and add. - M.: Mechanical Engineering, 1982. - 415 p., Ill. (Series of reference books for workers), p. 287, fig. 18, a.

The disadvantage of this design of the gear wheel is that the teeth of the wheel, especially heavily loaded, are subject to bending loads that can lead to fracture of the teeth.

As a prototype, the design of a gear wheel containing a body, a gear ring with teeth and a pair of flat cylindrical annular overlays mounted on the ends of the teeth, adjacent to their vertices, was taken - see A.S. USSR No. 1578406, class F16H 55/12, publ. 07/15/90, bull. No. 26. Pads linking the teeth of the wheel to each other increase their mutual stiffness and bending strength.

The disadvantage of the prototype is that the annular lining, connecting the teeth of the wheel and increasing their mutual rigidity, have the form of external and internal profiles in the form of circles with the same radii and the same curvature around the entire circumference of the wheel, equidistant with respect to the circumference of the wheel. In the case of impact on the teeth of the wheel of the wheel, the execution of ring pads of a similar shape will impose excessive rigidity to the teeth of the wheel, which will lead to impacts on the wheel as a whole, which, in turn, will lead to impacts on the shaft on which the wheel is mounted, and the mechanism with which this shaft is connected.

The invention solves the problem of damping shock loads acting on the teeth of the wheel during its operation.

To this end, the gear wheel contains a body, a ring gear with teeth and a pair of flat annular overlays mounted on the ends of the teeth; moreover, the areas of the pads adjacent to the ends of the teeth and mounted on them are offset radially relative to the tops of the teeth towards the center of the wheel; sections of the plates located between adjacent teeth have a curvature of the external profile greater than the curvature of the circle into which the outer sides of the sections of the plates mounted on the ends of the teeth fit; and the curvature of the internal profile of the patches located between adjacent teeth is equidistant to the curvature of their external profile.

The invention is illustrated by the drawing, which shows: a fragment of a gear wheel - end view (Fig. 1) and a section of a fragment of a wheel - side view (Fig. 2).

от вершин зубьев (2) до накладок (3, 4), расстояние c от накладок до оснований зубьев, радиус R₃ окружности вписывания внешних сторон накладок на торцах зубьев.The drawing shows: body 1, ring gear with teeth 2, ring overlays 3 and 4, circle of 5 vertices of the ring gear, circle of 6 bases of the ring gear, height h of the teeth, width a of the ring linings, radii R ₁ and R _{2 of the} curved sections of the linings, distance

from the tops of the teeth (2) to the pads (3, 4), the distance c from the pads to the base of the teeth, the radius R _{3 of the} circle of inscribing the outer sides of the pads on the ends of the teeth.

. Участки накладок, расположенные между соседними зубьями, имеют кривизну (радиусом R₁) внешнего профиля большую, чем кривизна окружности, в которую вписываются внешние стороны участков накладок, укрепленных на торцах зубьев (радиусом R₃), а кривизна (радиусом R₃) внутреннего профиля накладок, расположенных между зубьями, эквидистантна кривизне (R₁) их внешнего профиля.The gear wheel contains a body 1, a ring gear with teeth 2 of height h and a pair of flat annular overlays 3 and 4 of width a , mounted on the ends of the teeth. The sections of the pads adjacent to the ends of the teeth and mounted on them are shifted radially relative to the circumference of the vertices of the 5 teeth in the direction of the center of the wheel - by

. The areas of the pads located between adjacent teeth have a curvature (radius R ₁ ) of the external profile greater than the curvature of the circle into which the outer sides of the sections of the pads mounted on the ends of the teeth (radius R ₃ ) fit in, and the curvature (radius R ₃ ) of the internal profile the lining located between the teeth is equidistant to the curvature (R ₁ ) of their external profile.

- позволяет дополнительно демпфировать ударные нагрузки, действующие на зубья (за счет освобождения участков головок зубьев - на участках размером

- от жесткой их связи между собой накладками).When the wheel is in gear, in the mode of its loading, the annular linings 3 and 4, interconnecting the teeth 2 of the ring gear, increase their mutual stiffness and bending strength. The implementation of the sections of the plates located between adjacent teeth and having increased curvature allows you to dampen shock loads acting on the teeth and the gear wheel as a whole. And the displacement of the pads relative to the tops of the teeth (in the areas of their attachment to the ends of these teeth) - by the amount

- allows additional damping of shock loads acting on the teeth (due to the release of sections of the tooth heads - in sections of size

- from their rigid connection between themselves with overlays).

Compared with the prototype, the proposed design of the gear allows damping of shock loads acting on the wheel during its operation. This increases the reliability of the gear and the smoothness of its work.

Claims (1)

A gear wheel, mainly heavily loaded, subject to shock loads, comprising a body, a gear rim with teeth and a pair of flat ring plates mounted on the ends of the teeth, characterized in that the sections of the flat ring plates adjacent to the ends of the teeth and mounted on them are offset radially relative to the tops of the teeth toward the center of the gear, sections of flat annular overlays located between adjacent teeth have a curvature of the external profile greater than the curvature of the circle into which I enter Xia outer side portions flat annular linings fixed on the ends of the teeth, and the curvature of the internal profile portions flat annular pad disposed between adjacent teeth, equidistant curvature of the outer profile.

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