RU2600362C1 - Gear wheel - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to machine building and can be used in coarse-grained toothed gears lubricated by plastic lubricants. Gear wheel comprises a body, a toothed rim with teeth, volumes of scallops between which not occupied during engagement by teeth of the conjugated wheel are filled with inserts fixed in them, and a pair of end face pads fixed on end faces of the body sections. Pads are adjacent to the toothed rim with gaps relative to the teeth end faces. Inserts have a length exceeding the toothed rim width by the value of dimensions of the pair of gaps between end faces of the toothed rim and the end face pads.

EFFECT: provided is higher quality of the gear wheel lubrication.

1 cl, 2 dwg

Description

The invention relates to mechanical engineering, in particular to machine parts, and can be used in large-modular gears lubricated with plastic lubricants.

It is known a gear wheel containing a body and a gear ring with teeth, the volume of the hollows between which are not occupied by the teeth of the mating wheel are filled with inserts made of other material, such as rubber, reinforced in them, the length of the inserts is equal to the width of the gear ring, and between the inserts and the tops of the teeth of the mating wheel made the minimum gaps (see patent for the invention of the Russian Federation No. 2390678, class F16H 57/04, publ. 05/27/2010, bull. No. 15). The inserts filling the aforementioned volumes of the depressions do not allow the plastic lubricant displaced during operation of the wheel into gears from the lateral (working) surfaces of the teeth to accumulate in these areas of the depressions and to be excluded from the lubrication of the friction surfaces of the teeth of the wheel. This reduces the consumption of lubricant used to lubricate the teeth of the wheel, and optimizes the lubrication mode of the wheel.

The disadvantage of this design of the gear wheel is that when the wheel is lubricated with plastic lubricant, this lubricant is also displaced to the ends of the teeth and, falling on these ends, outside the zone of engagement of the gears of the wheel and the teeth of the pair of wheels, is excluded from the lubrication of friction (lateral) tooth surfaces. This leads to an excessive consumption of lubricant and worsens the lubrication mode of the teeth of the wheel.

As a prototype taken gear design on.with. USSR No. 1618972, class F16H 57/04, publ. 01/07/91, bull. No. 1. Its essence lies in the fact that the gear wheel contains a body, a ring gear with teeth and a pair of ring plates mounted on the parts of the ends of the body, with gaps relative to the ends of the teeth of the wheel. The pads hold plastic lubricant displaced from the lateral (friction) surfaces of the teeth to the sides of the tooth ends in the friction region of the mating teeth of the pair gear wheels, which reduces the consumption of the used lubricant and optimizes the lubrication process of the gear teeth.

The disadvantage of the prototype is that in the case of filling the base of the hollows between the teeth of the inserts, the length of which is equal to the width of the tooth rim, and the presence of end plates having gaps relative to the ends of the teeth, the plastic material displaced from the lubrication zone of the teeth falls into the gaps between the ends of the inserts and the internal surfaces end plates, eliminating from the lubrication process. This leads to an overspending of the used lubricant and impairs the lubrication mode of the teeth of the wheel.

The invention solves the problem of improving the quality of lubrication of the teeth of the wheel.

To this end, the gear wheel contains a body, a ring gear with teeth, the volumes of the depressions between which are not occupied by the teeth of the mating wheel are filled with reinforced inserts, and a pair of ring plates mounted on the ends of the body parts adjacent to the ring gear, with gaps relative to the ends of the teeth; moreover, the inserts have a length greater than the width of the ring gear by the size of the pair of gaps between the ends of the ring gear and the end plates.

The invention is illustrated by drawings, which depict: a fragment of the gear wheel from the end (Fig. 1), the same fragment in section - side view (Fig. 2).

The drawings show: body 1, ring gear with teeth 2, ring overlays 3 and 4, inserts 5, height h of inserts, gaps Δ between the ends of the teeth and the overlays, the radius R _{o1 of the} circumference of the tooth bases (2) of the wheel, the radius R _{in1 of the} circle of the vertices gear teeth, radius R _B2 circumference of the tops of the teeth of the twin wheels.

The gear wheel contains a body 1, a ring gear with teeth 2 and a pair of annular plates 3 and 4, mounted on parts of the ends of the body adjacent to the ring gear with gaps Δ relative to the ends of the teeth. The volumes of cavities between the teeth that are not occupied when the teeth of the mating wheel are engaged (with a circle of vertices of radius R _B2 ) are filled with inserts 5 of height h and a length equal to the distance between the inner surfaces of the plates (3 and 4).

During the operation of the gear wheel, a plastic lubricant displaced from the side (working) surfaces of the teeth by 2 teeth of the twin gear wheels is displaced towards the ends of the teeth (2) and the inner surfaces of the end plates (3, 4). The implementation of the length of the inserts 5 equal to the distance between the inner surfaces of the linings prevents the displaced lubricant from entering the gaps (Δ value) between the ends of the inserts and the inner surfaces of the end plates.

Compared with the prototype, the proposed design of the gear wheel reduces the consumption of lubricant used to lubricate the teeth of the wheel, and improves the quality of their lubrication.

Claims (1)

A gear wheel, mainly large-caliber, lubricated with a plastic lubricant, containing a body, a gear ring with teeth, the hollow spaces between which are not occupied by the teeth of the mating wheel are filled with inserts reinforced in them, and a pair of end plates mounted on the ends of the body parts adjacent to the ring gear with gaps relative to the ends of the teeth, characterized in that the inserts have a length greater than the width of the ring gear by the size of the pair of gaps between the ends of the ring gear and t rtsevymi overlays.

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