초록 ▼

A self-locking dual worm gear with parallel axes and linear contact for the worms with involute herringbone gears is characterized by the fact that the cross sections for curvature radii pnm1 and pnm2 and the longitudinal sections for curvature radii pxm1 and pxm2 of the worm profile are always dete

A self-locking dual worm gear with parallel axes and linear contact for the worms with involute herringbone gears is characterized by the fact that the cross sections for curvature radii pnm1 and pnm2 and the longitudinal sections for curvature radii pxm1 and pxm2 of the worm profile are always determined at the point of contact M for the teeth and with the following equations: pnm1=ptm1/cos bB1; pnm2=ptm2/cos bB2 pxm1=pnm1ㆍsin bB1=ptm1ㆍgbB1; pxm2=pnm2ㆍsin bB2=ptm2ㆍtgbB2 wherein ptm1 and ptm2 represent the curvature radii of an involute profile in the cross section at contact point M and bB1 and bB2 are the tooth edge inclinations for the worms with [Figure] wherein rm1 and rm2 represent the operational radii for the circles, which run through contact point M and rB1 and rB2 are the basic circle radii for the worms. One tool for manufacturing the worm profiles for the self-locking dual worm gear has turning tools with rounded cutting edges and curvature radii R1 and R2 which are determined with the following formulas: [Figure] [Figure]

대표청구항 ▼

A Self-locking dual worm gear having parallel axes and linear contact of the worms with an involute tooth system and wherein the worm profile cross sections of curvature radii pnm1 and pnm2 and the longitudinal sections of curvature radii pxm1 and pxm2 are determined respectively at a contact point

A Self-locking dual worm gear having parallel axes and linear contact of the worms with an involute tooth system and wherein the worm profile cross sections of curvature radii pnm1 and pnm2 and the longitudinal sections of curvature radii pxm1 and pxm2 are determined respectively at a contact point M of the worm teeth using the following equations: pnm1=ptm1/cos bB1; pnm2=ptm2/cos bB2, Pxm1=Pnm1ㆍsin bB1=ptm1ㆍtgbB1; Pxm2=pnm2ㆍsin bB2=Ptm2ㆍtgbB2, wherein ptm1 and ptm2 represent the curvature radii of an involute profile cross section at contact point M and bB1 and b2 are the tooth inclination angles at the base circles for the worms; and [Figure] wherein rm1 and rm2 are the operational radii for the circles, which run through contact point M, and rB1 and rB2 are the base circle radii for the worms.