RU2552579C1 - Tooth-wheel - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: tooth-wheel consists of a body in the form of a disk with a hub and of a toothed rim with teeth. The outer disk diameter is equal to the outside diameter of the gear rim. The toothed rim is made as shaped ring out of strap with width equal to width of teeth of the toothed rim. The external profile of the ring corresponds to the profile of the toothed rim, ring by one end face is secured in the disk end face. On the end face of the internal surface of the profiled ring removed from the disk, and on end face of the disk the cone ring is secured, it is tapered towards the disk.

EFFECT: optimised design of the tooth-wheel, lower costs of its manufacturing.

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Description

The invention relates to mechanical engineering, namely to machine parts, and can be used in gears.

A gear wheel is known that contains a body with a hub and a gear rim with teeth made of one workpiece - see, for example, "General Technical Reference / Ed. Skorokhodova - 2nd ed., Revised. and add. - M.: Mechanical Engineering, 1982. - 415 p., Ill. (Series of reference books for workers) ”, p. 287.

The disadvantage of this design of the gear wheel is that with large-modulus teeth, the magnitude of the bending moments acting on the teeth, which can lead to their fracture, increases.

As a prototype, the design of a composite gear wheel is taken, in which the body with the hub and the gear ring are manufactured separately, with subsequent assembly into a single unit, and the gear ring consists of a ring gear with teeth along its outer perimeter - see "Production of gears: Reference / S.N. Kalashnikov, A.S. Kalashnikov, G.I. Kogan et al .; Under the total. ed. B.A. Thai. - 3rd ed., Revised. and extra. - M.: Mechanical Engineering, 1990. - 464 p.: Ill. ", P. 36.

The disadvantage of this design of the gear wheel is that with large-modulus teeth, bending loads on the teeth increase, which can lead to their breakage.

The invention solves the problem of optimizing the design of the gear wheel and reducing the cost of its manufacture.

For this, the gear wheel contains a body in the form of a disk with a hub and a ring gear, the outer diameter of the disk being equal to the diameter of the circle of the tops of the ring gear, the ring gear is made in the form of a profile ring from a strip with a width equal to the width of the teeth of the ring gear; the outer profile of the ring corresponds to the profile of the ring gear; the ring is fixed at one end of the disk with one of its ends; at the end of the inner surface of the profile ring, remote from the disk, and the end of the disk is mounted a conical ring, tapering towards the disk.

The invention is illustrated in the drawing, which shows: a gear wheel - end view (figure 1) and the same wheel - side view (figure 2).

The drawing shows: the disk 1 of the body, the hub 2, the ring gear 3 with teeth 4, a conical ring 5; the width of the ring gear; diameter D _{In the} circumference of the tops of the ring gear; diameter D _{VP of the} circumference of the depressions of the ring gear; diameter D of the inner circumference of the profile ring (ring gear); thickness C of the strip from which the ring gear 3 is made; small diameter D _{To the} conical ring.

The gear wheel consists of a body in the form of a disk 1 with a hub 2 and a gear ring 3 with teeth 4 made of a strip of width B equal to the width of the teeth of the gear ring and thickness C (selected taking into account the rigidity of the gear ring); the outer diameter of the ring is equal to the diameter D _{In the} circumference of the tops of the ring gear; the outer profile of the ring corresponds to the profile of the ring gear with the diameter of the circumference of the troughs D _{VP of the} ring gear; the inner diameter D of the ring corresponds to the diameter of the circumference of the depressions of the ring gear D _VP minus the double thickness C of the strip. The profile ring is fixed with one end on the end face of the disk 1 of the wheel body. At the end of the inner surface of the profile ring (ring gear), remote from the disk, and the end of the disk, a conical ring 5 is strengthened, tapering towards the disk. The conical ring 5 serves to increase the rigidity of the profile ring (ring gear) 3, the inner diameter of the conical ring 5 is set based on providing them with the required increase in rigidity of the profile ring (ring gear) 3.

Compared with the prototype, the proposed gear design is optimal for coarse-grained narrow teeth of lightly loaded gears; it allows to reduce the material consumption of gears and material costs in their manufacture.

Claims (1)

A gear wheel, mainly large-module, lightly loaded with narrow teeth, containing a body in the form of a disk with a hub and a ring gear, characterized in that the outer diameter of the disk is equal to the diameter of the circle of the tops of the ring gear; the ring gear is made in the form of a profile ring from a strip with a width equal to the width of the teeth of the ring gear; the outer profile of the ring corresponds to the profile of the ring gear; the ring is fixed at one end of the disk with one of its ends; at the end of the inner surface of the profile ring, remote from the disk, and the end of the disk is mounted a conical ring, tapering towards the disk.

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