Two freedom degree straight line ring surface worm transmission and method for manufacturing same

Abstract

The invention discloses a novel dual-freedom straight annular worm transmitter and relative production. The invention comprises a worm rod (1), a worm (2), a blade base (3), a worm roller (4), a worm axle (5), a worm axle (6), a blade base axle (7), and a straight blade (8). The straight blade (8) processes dual-freedom motion to form the screw face of annular worm rod (1), to obtain the dual-freedom straight annular worm rod. And the worm roller (4) has same face with the screw face of annular worm, to process the tooth of worm (2). The annular worm rod (1) and the worm (2) form the dual-freedom straight annular worm rod transmission, with the advantages of straight annular worm, better contact area and contact quality.

Description

technical field [0001] The invention relates to a novel toroidal worm transmission and a manufacturing method thereof, belonging to the toroidal worm transmission. technical background [0002] Straight-profile toroidal worm drives are widely used at home and abroad, and the most famous brand is "Cone Drive" in the United States, which has a history of more than 80 years. [0003] When machining a straight-profile toroidal worm, the turning tool is installed on the rotary tool holder, and the straight blade is on the axis plane of the worm, and the radius is r b The forming circle is tangent; the worm blank and the tool seat are according to the transmission ratio i ld When doing relative motion, the car goes out of the helical surface of the worm. The rotation angle of the worm is the only independent motion parameter, and the linear blade has only 1 degree of freedom. Use the hob with the same production surface as the helical surface of the straight-profile toroidal wo...

AI Technical Summary

Problems solved by technology

[0005] The disadvantage of the straight-profile toroidal worm drive is: the original type without modification, although the two-line contact, but one of them is the straight line where the middle plane of the worm gear and the tooth surface intersect, which is a constant contact line, while the rest of the contact lines are distributed on the worm gear tooth surface Not only the half of the tooth surface is not fully utilized, but also the working conditions of the constant contact line are poor, and pitting corrosion is prone to occur

Through modification, the contact quality is improved by removing the normal contact line with the worst contact quality, but the single-line contact on the tooth surface, and the contact line is concentrated on a part of the worm gear tooth surface, which fails to make full use of the entire tooth surface

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