RU2635434C1 - Gear wheel - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: gear wheel comprises a body and a toothed rim with teeth made of ferromagnetic material. A pair of circular straps made of diamagnetic material is secured on teeth ends. The outer diametre of the lining is not less than the diametre of the circumference of the gear rim vertices, the inner diametre of the lining is greater than the diametre of the circumference of the gear rim bases. The ends of the wheel from the ring linings to the shaft on which the gear wheel is mounted are coated with a diamagnetic material.

EFFECT: improved quality of gear wheel lubrication.

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 - not involved in the friction processes and not in need of 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 gear ring with teeth made of ferromagnetic material. At the ends of the teeth of the ring gear a pair of annular plates made of diamagnetic material is strengthened. The outer diameter of the linings is not less than the diameter of the circumference of the tops of the ring gear, the inner diameter of the linings is larger than the diameter of the circle of the bases of the ring gear. And on both ends of the wheel - from the ring plates to the shaft on which the gear wheel is mounted, a coating of diamagnetic material is applied.

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 is a side view (Fig. 2).

The drawings show: the body of the gear 1, the ring gear with teeth 2, the ring lining 3 and 4, coating 5; 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; radius R _{VN of the} inner perimeter of the ring plates; width _ of ring overlays; thickness _ annular linings; the difference between the radii R _o and R _ext.

The gear wheel contains 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 is R _в , the radius of the circle of the bases of the ring gear is R _о , the height of the teeth is h, the width of the teeth is B. A pair of ring plates 3 and 4 made of diamagnetic material are fixed at the ends of the teeth 2. The radius of the outer perimeter of the pads is equal to R _in , the radius of the inner perimeter of the pads R _{VN is} greater than the radius of the circumference of the bases of the ring gear (Ro). The width of the pads is equal to a , the thickness of the pads is equal to c. Between the inner circumference of the crown overlays and depressions are formed in the window height, through which the toothing hollows in communication with the ends of the wheel. On the parts of the ends of the teeth 2 - between the inner perimeters of the linings 3, 4 and the circumference of the bases of the gear (radius Ro) - and on the ends of the body 1, between the circumference of the bases of the gear and the shaft on which the gear is mounted, a coating 5 of diamagnetic material is applied ( smearing method).

When the gear wheel is lubricated by the magnetic particle method, ring linings 3 and 4 made of diamagnetic material (the thickness of which is equal to c) shield the ends of the teeth 2 from sticking powder lubricant on them (the teeth are more likely to stick than other parts of the wheel - wheel body ends). A coating 5 of diamagnetic material shields the ends of the body 1 and the parts of the ends of the legs of the teeth 2 on which this coating is applied. The presence of gaps (in height) between the linings 3, 4 and the base of the tooth cavities do not allow the accumulation of powder lubricant in the base of the hollows of the ring gear, thereby preventing jamming of the mating teeth of the pair gears of the gear; through these gaps, the powder lubricant can self-remove from the base area of the depressions of the ring gear.

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 powder method, containing a body and a gear ring with teeth made of ferromagnetic material, characterized in that a pair of ring plates made of diamagnetic material are strengthened at the ends of the teeth, the outer diameter of the ring plates is not less than the diameter of the circle of the tops of the ring gear, the inner diameter of the ring plates is larger than the diameter of the circumference of the bases of the ring gear, and on both ends of the gear from the inner perimeter of the ring plates to the shaft on which the gear is mounted is coated with diamagnetic material.

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