SU1275172A1 - Device for converting rotary motion to translational motion - Google Patents

Abstract

The invention relates to mechanical engineering, in particular, to devices for converting vras, body movements into translational. The purpose of the invention is to improve the accuracy of motion transfer due to the implementation of intermediate elements in the form of swivel rollers, due to the intersection of the rail, their grooves, equidistant cycloids, and a certain location of the rollers in them. The device on the rail 2 has intersecting grooves 3, with which the swivel rollers 5 interact. The rollers are placed in the grooves so that the ratio of the outer diameter of the rollers to the diameter of their location for the number n of rollers (more than three) is equal to or less than the value of 2sin

Description

The invention relates to mechanical engineering, in particular, to devices for converting rotary motion into translational.

The purpose of the invention is to improve the accuracy of motion transmission by making intermediate elements in the form of rollers installed with the possibility of rotation, and making intersecting grooves equidistant to cycloids on the rail, and a certain ratio of the outer diameter of the rollers to the diameter of their location.

FIG. I shows a device for converting rotary motion into a single position} 1st, general view; in fig. 2 - schemes of engagement of the rollers with the rail with different numbers of rollers.

A device for converting rotary motion into a translational movement comprises the directions 1.u.u 1, installed therein with the possibility of translational movement of the rail 2, on which the intersecting grooves 3 are made, equidistant to cycloid. The device also contains a rotary disk 4 with diametrically arranged on it intermediate engagement elements made in the form of rollers 5 installed rotatably, and the ratio of the outer diameter of the rollers to the diameter of their location for the two rollers is chosen equal to or smaller than

CONDITIONS cos (tl) where the angle t is equal to t-sint, for the three rollers is chosen equal to or less than 1 PMU, 1 is 11111, determined from the condition “. 2l 1- costi, 2sin4 where the angle ti is 1 | - sinti 2 and for n (more than three) number of rollers is chosen equal to or less than the value of „. A 2 liter of 2sin- - A device for converting rotary motion into translational works as follows. When the disc 4 is rotated, for example, clockwise, the rollers 5 interact with the side walls of the groove 3 and the rail 2 moves in the direction of the arrow B. When changing 1 in the direction of the rotation of the disc 4, the rollers 5 begin to interact with the opposite walls of the groove 3 and the rail 2 moves in Reverse arrow in direction. When changing the direction of rotation, the backlash of the rail is within the tolerance for movement of the roller in the groove.

With two rollers (Fig. 2) at the moment the roller 5 leaves the engagement with the point W while moving in the direction of the arrow. And the other rail 5 must engage with the point L. At the same time, the backlash-free transmission is provided with the ratio of the outer diameter of the rollers to the diameter of their location, equal to or less than the value determined from the condition

0 i-th -2cos ().

cos ()

where the angle t is found from the condition t-sint - 2

With three rollers (Fig. 3) at the moment of roller 5 coming out of engagement with point I

5 of the rail 2 when moving in the direction of the arrow P, the roller must engage with point C. In this case, the backlash-free transmission is provided with a ratio of the outer diameter of the rollers to the diameter of their location equal to or smaller than

0 specific condition

 L- cost I

Z (S „;„ 2 ЗГ}

3

where the angle ti is found from the condition ti-sinti V

For l (more than three) rollers (Fig. 4), a backlash-free transmission is ensured when the outer diameter of the rollers is related to the diameter of their location, equal to or less and 1 size, determined by my condition

2.Pl

2sin-cos-l

Claims (1)

n At the moment the roller 5 leaves the link with the point Y while moving in the direction of the arrow F, the other roller 5 must enter into the link with the point C. Apparatus of the Invention A device for converting rotary motion into a translational movement comprising a railing mounted on it with the possibility of translational movement and a rotary disk with intermediate elements of an engagement diametrically arranged on it, characterized in that, in order to improve the accuracy of motion transmission, the intermediate elements of engagement are made in the form of rollers installed with the possibility of rotation, and intersecting grooves are equidistant to cycloid on the rail; the diameter of the rollers to the diameter of their location for two rollers is chosen equal to or smaller than a, determined from the condition of - 2COS, 3l- t N cos () 2) where the angle t is found from the condition t-sint 4-FOR the three rollers is selected to be equal to or less than the value a determined from the condition Oh, 2n 1- costi a, 2 (sm3gsinA where the angle is 11. find from the condition ti-sinti - and for n (more than three) number of rollers is chosen equal to or less than the value of Oz AZ ncos- - fpuz.Z FIG L