The Method of Involute Helical Double Forming Surface into Point Contact Toroidal Worm Pair

A toroidal worm and point contact technology is applied to the tooth surface forming of the involute helical double-shaped surface respectively developed into a toroidal worm and a worm gear, and the involute spiral double-shaped surface developed into a point contact toroidal worm pair. It can solve the problems of no regrindability, insensitivity to errors and high bearing capacity of hob or shaving cutter, so as to avoid complex manufacturing, reduce sensitivity and improve production efficiency.

Active Publication Date: 2021-06-22
CHINA AGRI UNIV +1
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  • Abstract
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Problems solved by technology

[0003] In the toroidal worm drive, hobs or gear shaving cutters are not regrindable, and the manufacturing is complicated. At present, there is no public report on the method of developing the involute spiral double-shaped surface into a point-contact toroidal worm pair. The principle that the conjugate tooth surfaces of the gear pair can form point or line contact provides a theoretical basis for the involute helical double-shaped surface to develop a point-contact toroidal worm pair, and the point-contact hypoid gear pair has a high load-carrying capacity and is Error insensitivity is widely used

Method used

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  • The Method of Involute Helical Double Forming Surface into Point Contact Toroidal Worm Pair
  • The Method of Involute Helical Double Forming Surface into Point Contact Toroidal Worm Pair
  • The Method of Involute Helical Double Forming Surface into Point Contact Toroidal Worm Pair

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Embodiment Construction

[0013] Embodiments of the present invention will be described below according to the accompanying drawings.

[0014] The relevant parameters for designing the toroidal worm pair are: the number of 1 head of the right-handed toroidal worm z 1 = 1, right-handed worm gear 2 teeth number z 2 =45, constituting the axis angle Σ 12 =90°, center distance a 12 =90.5mm, transmission ratio i 12 =45 involute spiral double production shape surface primary envelope point contact ring surface worm drive, worm working length L w1 = 30mm.

[0015] According to the design requirements, the relevant parameters for selecting the involute cylindrical worm cutter 3 are: the number of 3 heads of the right-handed involute cylindrical worm cutter z 3 =2. Lead angle of indexing circle γ 3 =10.73°, axial modulus m x3 =3.6mm, graduation circle diameter d 3 =38mm, diameter of dedendum circle d f3 =29.51mm, addendum circle diameter d a3 =45.07mm, base circle radius r b3 =8.65mm. The relevant pa...

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Abstract

The invention relates to a method for developing a double-shaped involute spiral surface into a point-contact ring surface worm pair, which belongs to the technical field of mechanical transmission. The toroidal worm 1 and the involute helical gear tool 4 form the tooth-cutting meshing transmission of the involute helical primary enveloping toroidal worm, and the helical surface S4 of the involute helical gear tool 4 develops into the tooth surface of the torus worm 1 S1; the worm gear 2 and the involute cylindrical worm tool 3 form the tooth-cutting and meshing transmission of the involute cylindrical worm primary enveloping worm gear, and the spiral surface S3 of the involute cylindrical worm tool 3 is developed into the tooth surface S2 of the worm wheel 2; The axes of the toroidal worm 1 and the worm gear 2 are installed staggeredly, and the tooth surface S1 of the toroidal worm 1 and the tooth surface S2 of the worm gear 2 are in point-contact conjugate meshing to obtain a point-contact toroidal worm pair to replace the one that is sensitive to manufacturing and installation errors. Line contact toroidal worm drive.

Description

technical field [0001] The invention relates to a method for developing a point-contact toroidal worm pair with an involute spiral double-shaped surface, which belongs to the technical field of mechanical transmission, and in particular to a tooth with an involute spiral double-shaped surface respectively developed into a toroidal worm and a worm wheel surface forming method. Background technique [0002] Straight-profile toroidal worm drives, plane primary and secondary enveloping toroidal worm drives, double-cone enveloping toroidal worm drives and other worm drives are all multi-tooth and line contact drives, which make the drive very sensitive to manufacturing and installation errors. The meshing tooth surface of the worm pair requires high machining accuracy and installation accuracy. The main reason is that the worm gear is generally developed by a hob or razor whose helical surface is consistent with the worm helical surface. The helical surface of the worm wheel and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23F11/00B23F13/00B23F13/06
CPCB23F11/00B23F13/00B23F13/06
Inventor 李海涛任雯龙新佳妮许召宽李苗苗
Owner CHINA AGRI UNIV
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