SU1346865A1 - Profile keyless joint - Google Patents

Abstract

The invention relates to mechanical engineering and can be used for the mobile connection of parts such as a hub-shaft in the transmission of torque. The aim of the invention is to increase the reliability of the connection. When a torque is applied, the shaft 1 and the sleeve 2 rotate one relative to the other around the axis of symmetry O, along the surfaces of the centering sections 3 and 4 before contact at the corresponding points of the moment-transmitting sections 5 and 6. In this position, the torque is transmitted. When a torque is applied in the other direction, the shaft 1 and the sleeve 2 are pivoted relative to each other around the axis symmetrically along the surfaces of the centering sections 3 and 4, while the moment-transmitting sections 5 and 6 exit the contact at the indicated points. The relative rotation of the shaft 1 and the sleeve 2 continues until the contact of the moment-transmitting sections 5 and 6 at certain points corresponding to a given direction of rotation. 2 Il. (/) 00 j: 35 EO 05 cl

Description

one

The invention relates to a structure and can be used to connect parts such as a sleeve-shaft in the transmission of torque.

The purpose of the invention is to increase the reliability of the connection with an arbitrary number of faces.

Figure 1 shows the connection in the unloaded condition, a general view; Fig. 2 shows the same, when a torque is applied.

The connection includes a shaft 1 and a sleeve 2, mated on. non-circular profiles. The matching surfaces have the centering sections 3 and 4 with central angles Y and jf made with radius R with center at point 0. (center of symmetry of the joint), and moment transferring sections 5 and 6 with central angles J a and), made with radii P, and P with centers at points 0 and 0. The centers of the radii of curvature of the moment-transmitting sections 5 and 6 are located on the same line. The radius of curvature of the shaft 1 is less than the corresponding radius of curvature of the sleeve 2, and the moment-transmitting stations 5 and 6 are located relative to each other with a gap about equal to the difference of the inscribed circles r and r and defined as half of the sum of the largest limiting deviations of the shaft profile in accordance with with the selected quality of connection accuracy.

If the moment transmitting sections 5 and 6 of the shaft 1 and the sleeve 2 are described by circular arcs, then taking into account the accepted conditions of force closure of the shaft and sleeve on the moment transmitting surfaces at the points of contact of the contour profile curves, the condition for determining the radius of the arc of the moment transmitting sections of the sleeve 2 given values of the radius P of the arcs of the moment-transmitting sections of the shaft 1 can be written as

. .i ii-l - p

 . )% yy (, .s) - i

46865 -2

When a torque is applied, the shaft 1 and the sleeve 2 rotate one OTHOJ relative to the other around the axis of symmetry 0 along the surfaces of the centering sections 3 and 4 before contact. At points A, A and A of the moment-transmitting sections 5 and 6. In this position the transfer of the torque of the moment. Q When a torque is applied in the other direction, the shaft 1 and the sleeve 2 rotate one relative to another around the axis of symmetry O along the surfaces of the centering sections 3 and 4, while the moment-transmitting sections 5 and 6 emerge from the contact at points A, A- and relative the rotation of the shaft 1 and the sleeve 2 continues until the contact of the moment-transmitting 2Q sections 5 and 6 at points B, B and

the use of the proposed connection will reduce the dynamic loads, increase the resource, and therefore, increase the reliability of the connection. Formula of the invention

A profile keyless joint containing a shaft and a sleeve, whose 2Q contours in cross section are made in the form of cyclically repetitive centering sections, described by circular arcs whose center coincides with the center of symmetry of the connection, and the moment-transmitting curvilinear sections with a center of curvature not coinciding with a center of symmetry of the joint, characterized in that, in order to increase the reliability of the joint with an arbitrary number of faces, the length of the arcs of the centering sections of the shaft contour is less than the length of the arcs corresponding to Enikeev centering sleeve portions and the radii of curvature smaller than the shaft portions momentoperedayuschih respective radii of curvature of the sleeve portions momentoperedayuschih in any cross-section, wherein the shaft and sleeve are mounted rotatably relative to one another by less than half of the difference of the lengths of the arcs of the centering portions.

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Editor A. Kozoriz

Compiled by V.Ivanov

Tehred I.Popovich Proofreader M.Demchik

Order 5111 / 36Tirage.803 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

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Claims (1)

SUMMARY OF THE INVENTION A profile keyless connection comprising a shaft and a sleeve, the mating contours of which in cross section are made in the form of cyclically repeating centering sections described by arcs of a circle whose center coincides with the center of symmetry of the connection, and moment-transmitting curved sections with a center of curvature that does not coincide with the center connection symmetry, characterized in that, in order to increase the reliability of the connection with an arbitrary number of faces, the length of the arcs of the centering sections of the shaft contour is less arc lengths corresponding centering bushing portions and the radii of curvature momentoperedayuschih uchast45 ^J Cove shaft smaller than the corresponding radii of curvature of the sleeve momentoperedayuschih portions at any cross-section, wherein the shaft and sleeve are mounted to crank one ⁵⁰ relative to the other by less than half of the difference of the lengths of the arcs centering portions .