SU754147A1 - Flexible toothed gear for wave gearing - Google Patents

Description

(54) FLEXIBLE GEAR SPOTTED WHEELED TRANSMISSION

This invention relates to mechanical engineering and can be used in a national household. A flexible wave gearing gear is known, which contains a gear ring made in the form of profiled corrugations and a cylindrical shell 11. Such a flexible gear works under conditions not only compressing but also bending loads at the points of engagement, which reduces its service life and leads to the need for expensive materials. The closest to the invention according to the technical essence is a flexible wave gear gear containing a gear ring made in the form of a corrugated corrugation, a shell and connected from conical} that transition part with incomplete tooth profiles 2 .. The flexible wheel has uneven strength in length because it is manufactured with irregular corrugated wall thickness, which affects the durability of the transmission operation. The purpose of the invention is to increase the durability and simplify the manufacturing technology of the flexible wheel. The goal is achieved by the fact that the cross-sectional area of the flexible wheel along its entire length is flat and the diameter of the shell is 1.5–2 times larger than the diameter of the gear rim. FIG. 1 shows a flexible gear wheel, a general view; in fig. 2 shows section A-A in FIG. 1. A flexible gear wheel contains a gear ring 1, made in the form of profiled corrugations, cylindrical surround 2 and the conical transition part 3 joining them with non-full-length profiles of teeth 4, which come to nothing as the diameter of the shell increases. From the conditions of equal strength of the flexible wheel, it follows that the length of the side surface of the teeth should be equal to the circumference of the cylindrical part of the shoe. For an involute profile, the projection of the side of the tooth on the pitch diameter equal to a quarter of the pitch P, we obtain the difference between the lengths of the projection and the actual side surface of the other side of the tooth with the engagement. 20 equal to h Pt 2, e 1.85, cos 20 ° 4 0, 4

h is the height of the tooth;

Where

m is a module.

Taking into account the two lateral sides of the tooth, the length of the lateral surface of the ring gear is equal to the circumference of the diametrical diameter, summed with the filter D 6 on the projection of the lateral surface of the tooth multiplied by the number of teeth

L-5d42AeL.

Substituted the value (1), we get

L ftdtS.TdSb.Sc). The same length corresponds to the length of the shell or

wheel blank diameter D, i.e.

From equality 6, D we find the ratio, 46 D.

Taking into account that the outer diameter is on average equal to dq 1,060d, we get.

With such a ratio of the diameters of the shell and the crown, the teeth roll up without drawing the walls with a constant thickness along the entire perimeter.

Claims (2)

Invention Formula A wave gear flexion wheel containing a gear ring made in the form of profiled corrugations, a shell and a conical transitional part connecting them with incomplete tooth profiles, so that, in order to increase durability and simplify the manufacturing technology, the cross-sectional area the flexible wheel along its entire length is constant, and the diameter of the shell is 1.5-2 times the diameter of the gear crown. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 179153, cl. F 16 H 1/00, 1964. 2. USSR author's certificate No. 485259, cl. F 16 × 1/00, 1972 (prototype) glo () 754147 In the process of making a flexible wheel (knurled stretching takes place along the sides of the teeth. With this phenomenon in mind, the ratio of the specified diameters is within D (l, 5-2) dq ..