RU2599851C1 - Gear wheel - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to machine building and can be used in tooth gears lubricated by plastic lubricants. Gear wheel includes body, gear rim with teeth and two end patch pieces fixed on body ends sections adjacent to gear rim. Patch pieces sections with radius larger than teeth bases circle radius are located at acute angle relative to toothed rim end faces.

EFFECT: higher quality of gear wheel lubrication.

1 cl, 1 dwg

Description

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

A gear wheel is known that contains a body and a ring gear with teeth - see, for example, “Iosilevich GB and other Applied Mechanics: For students of technical colleges / G.B. Iosilevich, P.A. Lebedev, V.S. Strelyaev. - M.: Mechanical Engineering, 1985. - 586 p., Ill. ", P. 315, Fig. 20.2 a.

The disadvantage of this design of the gear wheel is that when it is in gear, the lubricant deposited on the side (working) surfaces of its teeth is displaced by the teeth of the twin wheels - on the ends of the teeth and the ends of the wheel body. The displaced lubricant is excluded from the process of lubricating the teeth of the wheel, which intensifies the process of their wear.

As a prototype, the design of the gear wheel containing the body, a gear ring with teeth and a pair of end plates, the outer diameter of which is equal to the diameter of the circumference of the tops of the teeth of the wheel; pads mounted on the ends of the wheel body; and the pads themselves are parallel to the ends of the teeth of the wheel and are installed with gaps relative to them - see A.S. USSR No. 1618972, class F16H 57/04, publ. 01/07/91, bull. No. 1. The inner surfaces of the linings, together with the ends of the teeth of the wheel, form lubricant pockets that hold plastic lubricant displaced from the side surfaces of the teeth; from these pockets, the lubricant migrates back to the side surfaces of the teeth by virtue of its adhesive properties, lubricating them and stabilizing the processes of tooth friction, which improves the quality of their lubrication during operation.

The disadvantage of the prototype is that the plastic lubricant displaced - when the gear is in gear - from the side surfaces of its teeth and falling into the storage pockets formed by the ends of the teeth and the inner surfaces of the end plates, may not fit in these pockets. This will lead to the fact that the lubricant, having filled the pockets, will be squeezed out of them onto the outer surfaces of the end plates, while excluding the lubricant displaced onto these surfaces from the lubrication of the friction surfaces of the teeth, it contaminates these surfaces, this also leads to an excessive consumption of the lubricant . All this affects the lubrication quality of the gear.

The invention solves the problem of improving the quality of lubrication of the gear.

To this end, the gear wheel contains a body, a ring gear with teeth and a pair of end plates mounted on portions of the body ends adjacent to the ring gear, with gaps relative to the ends of the teeth; moreover, the sections of the end plates, having a radius greater than the radius of the circumference of the base of the teeth, are located at an acute angle relative to the ends of the ring gear.

The invention is illustrated in the drawing, which shows a fragment of a gear wheel - side view in section.

The drawing shows: the body 1, the gear tooth 2, end caps 3 and 4, the ends 5 of the body (1), the ends 6 of the teeth (2), the radius R _{in the} circumferential vertices gear teeth, the radius R _of the circle bases toothing, the inner radius R _ext end cover plates (3 and 4), the angle α between the inner surfaces of the end cover plates (3 and 4) and the end faces 6 of the teeth (2).

The gear wheel consists of a body 1, a ring gear with teeth 2 and a pair of end plates 3 and 4, mounted on sections of the ends 5 of the body adjacent to the ring gear. End pads are made in the form of rings with an inner radius R _ext and an outer radius equal to the radius R _{in the} circumference of the tops of the teeth. Moreover, the areas of the plates with a radius greater than the radius R _{about the} circumference of the base of the teeth are located at an acute angle α relative to the ends 6 of the ring gear (teeth 2).

When the gear is working with lubricating its teeth with plastic lubricant, this material, displaced from the side (working) surfaces of the teeth by 2 teeth of the mating gear, is squeezed into the grease pockets formed by the ends of the 5 teeth 2 and the inner surfaces of the end plates 3 and 4. When increasing the amount of lubricant displaced from the side surfaces of the teeth of the teeth, it enters the pockets, remote from the tooth bases 2 (and the volume of these pockets increases with increasing distance from the base th teeth).

Compared with the prototype, the proposed design of the gear wheel allows - due to the location of the end plates at an angle to the ends of the gear rim - to prevent the penetration of plastic lubricant displaced from the side surfaces of the teeth of the wheel onto the outer surfaces of the end plates. This ensures the localization of the lubricant in the zone of friction of the teeth and improving the quality of lubrication of the gear.

Claims (1)

A gear wheel, lubricated predominantly with plastic lubricant, containing a body, a gear ring with teeth and a pair of end plates mounted on portions of the ends of the body adjacent to the ring gear, with gaps relative to the ends of the teeth, characterized in that the sections of the end plates having a larger radius, than the radius of the circumference of the base of the teeth, are located at an acute angle relative to the ends of the ring gear.

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