RU2600389C1 - Gear wheel - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to machine building and can be used in gearings with heavy-duty gear wheels, lubricated by fictile lubricants. Gear wheel includes body, gear rim with teeth and two bearing end pads, fixed on teeth and wheel body ends. In pads external and internal surfaces corrugations forming radially oriented slots are made. Adjacent to teeth slots and acting as lubricating pockets are made to fit in them in teeth side surfaces plane in wheel rotation plane. These slots volumes on slots to wheel body ends abutment sections are filled with resilient inserts.

EFFECT: higher quality of gear wheel lubrication.

1 cl, 3 dwg

Description

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

A known design of a gear wheel containing a body, a ring gear with teeth and a pair of power plates in the form of flat rings with an outer diameter equal to the diameter of the circle of the tops of the ring gear, mounted on the ends of the teeth and parts of the ends of the body adjacent to the ring gear, see, for example, US patent No. 3861231, CL. 74-410, 1976. Power pads, connecting the teeth of the wheel, increase their mutual stiffness and flexural strength.

The disadvantage of this design of the gear wheel is that when lubricating its teeth with plastic lubricant, this material, displaced from the side (working) surfaces of the teeth by the teeth of the twin wheels, when they are interfaced, is displaced to the sides of the tooth ends and, being abutted by the end plates, is displaced in the sides of their upper circles - to the outer perimeter of the linings, and from there - to the outer ends of the linings (because in the case of end linings there is no volume to hold the displaced lubricant in the engagement zone paired gear teeth). This displaced lubricant is excluded from the process of lubricating the teeth of the wheel, which intensifies the processes of their wear and leads to an increase in the consumption of the lubricant necessary for the formation (restoration) of the lubricant layer on the friction lateral surfaces of the teeth (new portions of the lubricant have to be fed into the tooth engagement zone).

As a prototype taken gear design according to A.S. USSR No. 1523756, cl. F16H 55/12, publ. 11/23/89, bull. No. 43. Its essence is that the gear wheel contains a body, a gear ring and a pair of power end plates with an outer diameter equal to the diameter of the circumference of the tops of the gear rim, mounted on the ends of the teeth and the parts of the ends of the body adjacent to the gear rim; radial grooves are formed in the outer and inner surfaces of the linings, forming corrugations, and the inner grooves closest to the teeth are made adjacent to the lateral surfaces of the teeth along their entire length, equidistant to these surfaces. Power linings increase the rigidity and flexural strength of the teeth of the wheel; grooves forming corrugations optimize tooth rigidity during impact loads on these teeth that occur when the wheel is in gear; grooves (corrugations) adjacent to the lateral (working) surfaces of the teeth form lubricant pockets for plastic lubricant displaced from the tooth lateral surfaces - from these pockets, friction zones are fed on the lateral surfaces of the teeth due to adhesion forces, which optimizes the friction process of these teeth.

The disadvantage of the prototype is that the grooves (corrugations) of the pads adjacent to the side surfaces of the teeth and perform the function of lubricant pockets are located equidistant to these surfaces (along the entire length of these surfaces); and since Since the tooth flanks have a curved profile, are not flat, these grooves (corrugations), not radially oriented, have increased deformation stiffness, much larger than the other grooves (corrugations) of the overlays. Even the side surfaces of the teeth of the wheels of the semi-circular gears, being flat, are not radially oriented. As a result of this, the grooves (corrugations) adjacent to the lateral surfaces of the teeth do not perform their function (deformation, compensating shock loads).

The invention solves the problem of optimizing the design of the gear wheel: ensuring the operability of all grooves (corrugations) of the end plates with the provision of the fulfillment of their function as lubrication pockets.

To this end, the gear wheel contains a body, a ring gear with teeth and a pair of power end plates mounted on the ends of the teeth and parts of the ends of the body adjacent to the ring gear; radially oriented grooves forming corrugations are made in the outer and inner surfaces of the linings; moreover, the grooves adjacent to the teeth and acting as lubrication pockets are made with inscribed in them in terms of the lateral surfaces of the teeth in the plane of rotation of the wheel; and the volumes of these grooves in the areas adjacent to the grooves to the ends of the wheel body are filled with elastic inserts.

The invention is illustrated by the drawing, which shows: a fragment of a gear wheel with a local cut - end view (Fig. 1), the same is a side view (Fig. 2) and a section of a fragment (Fig. 3).

The drawing shows: the body of the wheel 1, the ring gear with teeth 2, the end plates 3 and 4, the ends 5 of the teeth, the ends 6 of the wheel body, grooves (corrugations) 7, side (working) surfaces 8, elastic inserts 9, diameter D _{in a} circle tooth top, the diameter D _o tooth root circle, the inner diameter D _ext end linings, linings and width, the width b of grooves (corrugations).

The gear wheel comprises a body 1, the ring gear with the teeth 2 end and a pair of power pads 3 and 4 with a width of an outer diameter equal to the diameter D _at vertices circumference toothing and the inner diameter D _ext smaller circle diameter D _o tooth root; pads mounted on the ends of 5 teeth and the ends 6 of the wheel body. In the outer and inner surfaces of the plates, there are made radially oriented grooves 7 of width b , forming corrugations (over the entire width a of the plates). The grooves adjacent to the teeth (2) and acting as lubrication pockets are made by inscribing 8 teeth in the planes of the wheel rotation into the planes of the side surfaces, and the cavities of these grooves between the diameters D _o and D _{inner are} filled with elastic inserts 9 made of oil and rubber resistant .

When the gear wheel is operating, the end-face power plates 3 and 4, connecting the teeth of the 2 wheels to each other (and the wheel body 1), increase their mutual stiffness and flexural strength. The grooves 7 forming the corrugations, allow damping shock loads acting on the teeth of the wheel during its operation in gear. The grooves (7) adjacent to the teeth (2) perform the function of lubrication pockets that hold plastic lubricant displaced from the side (working) surfaces of the 8 teeth with 2 teeth of the mating paired wheel, from which the lubricating material of the rubbing side (working) surfaces 8 gear teeth. The elastic inserts 9 do not allow the lubricant to be displaced through the bottom of the grooves 7 outside the zone of engagement of the teeth of the wheel, but allow the surfaces of the linings forming the grooves to deform under impact loads acting on the teeth of the wheel.

Compared with the prototype, the proposed gear design allows the grooves (corrugations) 7 due to their radial orientation to perform its function of damping shock loads acting on the gear teeth. At the same time, they are provided with the function of lubricating pockets holding the lubricant displaced from the tooth lateral surfaces and feeding them friction of these lateral surfaces.

Claims (1)

A gear wheel, mainly heavily loaded, lubricated with a plastic lubricant, containing a body, a gear ring with teeth and a pair of power end plates mounted on the ends of the teeth and the gear body, in the outer and inner surfaces of which are made radially oriented grooves forming corrugations, characterized in that that the grooves adjacent to the teeth are made with inscribing in them in terms of the lateral surfaces of the teeth in the plane of rotation of the gear wheel, and the volumes of these grooves in the areas where the grooves adjoin The body of the gear wheel is filled with elastic inserts.

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