Cross-ratio teeth number distribution instrument

Abstract

The invention relates to an anharmonic ratio teeth number distribution instrument, which mainly comprises two sliding blocks, two pin slots, a core pin, a bottom ruler which is connected with a flat head pin, a parallel four link mechanism which is formed by two swing stems and an upper connecting bar, a left swing ruler and a right swing ruler which are moveably connected on the joint between the swing stems and the upper connecting bar through the core pin. The two swing stems, the upper connecting bar, the bottom ruler, an upper sliding gauge and a lower sliding gauge are moveably connected together on a left lower and a right upper diagonal positions of a parallelogram through a pressure plate, the pin slots, a screw and a countersunk cushion, and scales are marked on the bottom ruler, the upper sliding gauge and the lower sliding gauge. The method for using the anharmonic ratio teeth number distribution instrument comprises assuring the overall speed ratio of gear transmission according to needs, and then adjusting the sliding blocks to a corresponding staff gauge, respectively fixing the sliding blocks on the bottom ruler through a top wire, rotating the swing stems, and then reading out the teeth number distribution values which are satisfied with requirements on the lower sling gauge and the upper sliding gauge. The anharmonic ratio teeth number distribution instrument can simply and conveniently get a group of optimum teeth number distribution values.

Description

Technical field: [0001] The invention relates to the technical fields of scientific instruments, calculation tools and visual teaching aids, in particular to a tooth number allocator used in gear design and a use method thereof. Background technique: [0002] In the existing gear design, the number of teeth distribution is manually calculated, which is time-consuming, laborious, and not accurate enough. Up to now, there is no specially designed tooth number distribution instrument. A method of using reconciliation is mentioned in the patent 85103479.A A teaching aid "harmony instrument" designed based on the principle of comparison, which is composed of a pair of symmetrical crank-slider mechanisms, a perfect circular dial, and a screw shaft with a positioning pin embedded in it. As a drawing instrument, it is A successful application of the principle of harmonic ratio. The harmonic ratio and non-harmonic ratio (cross ratio) are two basic invariants in projective geometry. ...

AI Technical Summary

Problems solved by technology

[0002] In the existing gear design, the number of teeth distribution is manually calculated, which is time-consuming, laborious, and not accurate enough. Up to now, there is no specially designed tooth number distribution instrument. A method of using reconciliation is mentioned in the patent 85103479.A A teaching aid "harmony instrument" designed based on the principle of comparison, which is composed of a pair of symmetrical crank-slider mechanisms, a perfect circular dial, and a screw shaft with a positioning pin embedded in it. As a drawing instrument, it is A Successful Application of the Principle of Harmony and Ratio

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