RU2630847C1 - Gear wheel - Google Patents

Abstract

FIELD: machine engineering.

SUBSTANCE: invention can be used in gears lubricated by magnetic powder method. The gear comprises a body and a toothed rim with teeth made of ferromagnetic material. A pair of circular straps made of diamagnetic material adjasent to the rear rim is secured on teeth ends and sections of the body ends. The outer diameter of the lining is not less than the diameter of the circumference of the gear rim vertices, and the side of each lining along its inner perimeter is located at obtuse angle with respect to the end of the wheel body.

EFFECT: improved quality of gear wheel lubrication quality.

2 dwg

Description

The invention relates to mechanical engineering, in particular to machine parts, and can be used in gears lubricated by the magnetic particle method.

A gear wheel is known that contains a body and a ring gear with teeth made of a ferromagnetic material and lubricated with a magnetic active powder lubricant activated by a magnetic field - see, for example, “Drozdov Yu.N. et al. Friction and wear under extreme conditions: Reference book / Yu.N. Drozdov, V.G. Pavlov, V.N. Puchkov. - Engineering, 1986. - 224 p.: Ill. - (the basics of the design of machines), p. 132, Fig. 2.

The disadvantage of this gear wheel is that under the influence of a magnetic field, a magnetically active powder lubricant is captured not only by the lateral surfaces of the gear teeth involved in the engagement and friction process with the mating lateral surfaces of the gear teeth of the paired gear, but also by the ends of the gear teeth and portions of the ends body adjacent to the ring gear, in the processes of friction are not involved and do not need lubrication. This impairs the quality of the lubrication process.

As a prototype taken analog design.

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

For this, the gear wheel contains a body and a ring gear with teeth made of ferromagnetic material. At the ends of the teeth of the ring gear and the parts of the ends of the body adjacent to the ring gear, a pair of ring plates made of diamagnetic material is strengthened, the outer diameter of which is not less than the diameter of the circle of the tops of the ring gear. The sides of the pads along their inner perimeter are beveled relative to the ends of the body at an obtuse angle.

The invention is illustrated by drawings, which depict: a fragment of a gear wheel with a local cut - end view (Fig. 1) and a section of this fragment, side view (Fig. 2).

The drawings show: the body 1 of the gear wheel, the ring gear with teeth 2, the ring lining 3 and 4; radius R _{in the} circle of the tops of the ring gear; radius R _{about the} circumference of the bases of the ring gear; tooth height h; tooth width B; inner radius R _ext annular pads; width in ring overlays; thickness C of the ring pads; and the difference between the radii R _o and R _ext; the angle α of the bevel of the ring plates on their inner perimeter.

The gear wheel consists of a body 1 and a ring gear with teeth 2 made of ferromagnetic material; the radius of the circumference of the tops of the ring gear - R _in ; the radius of the circumference of the bases of the ring gear - R _about ; tooth height - h; the width of the teeth is B. At the ends of the teeth 2 and the ends of the body 1 adjacent to the ring gear, a pair of annular plates 3 and 4 are made of diamagnetic material, for example, plastic. The outer radius of the pads is equal to R _in ; the inner radius of the pads - R _int ; lining thickness - C; the width of the pads - in , they overlap part of the ends of the body 1 - by the value of a . The sides of the plates along the inner perimeter (radius R _ext ) are beveled, with the formation of an obtuse angle α between them and the ends of the wheel body.

When the gear wheel is lubricated by the magnetic particle method, ring linings 3 and 4 made of diamagnetic material shield the ends of the teeth 2 of the gear rim and the adjacent parts of the ends of the body 1 from sticking to them magnetically active powder lubricant, improving the quality of the gear lubrication process. The parameters of the pads - their thickness C and the amount of overlap a of the ends of the body are set based on the used powder material, magnetic field strength, etc. The presence of an angle α between the inner sides of the pads 3, 4 and the ends of the body 1 does not allow the powder lubricant to be held on these sides of the pads.

Compared with the prototype, the proposed design of the gear wheel allows you to prevent the sticking of lubricant on the surface of the wheel, not requiring lubrication. This improves the quality of the gear lubrication process.

Claims (1)

A gear wheel, lubricated mainly by the magnetic particle method, containing a body and a gear ring with teeth made of ferromagnetic material, characterized in that at the ends of the teeth of the gear ring and parts of the body ends adjacent to the gear ring, a pair of ring plates made of diamagnetic material is strengthened, the outer diameter of which is not less than the diameter of the circumference of the tops of the ring gear, and the side of each annular lining along its inner perimeter is located at an obtuse angle relative to the end of the body ubchatogo wheel.

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