SU1740832A1 - Device for imparting rotary motion at regularly changing ratio - Google Patents

Abstract

Use: mechanical engineering, in particular, mechanical transmissions, used to communicate rotational motion with a periodically varying gear ratio in the drives of various machines. SUMMARY OF THE INVENTION: With an input link plug, a carrier is connected in conjunction with a shaft of satellites with a swing washer. With its spikes, the output link plug is pivotally connected. The central wheel is installed in the housing with the possibility of rotation perpendicular to the axis of the input link and is spring-loaded. The axes of the input and output links of the central wheel, the satellite shaft, spikes of the swinging washer and the spikes of the carrier intersect in the common center. The resulting rotation of the output link is the sum of the uniform rotation with the frequency of the input link and the oscillation of the spikes of the rocking washer with a frequency equal to the gear ratio of the planetary gear. By varying the inclination of the central wheel to the axis of the input link, the amplitude of the oscillation ratio of the output link changes. 1 h. the item of f-ly, 4 ill. Nw e

Description

The invention relates to mechanical engineering, in particular, to mechanical gears used to communicate rotational motion with a periodically varying gear ratio in the drives of various machines,

A device for communicating rotational motion with a periodically varying gear ratio is known, comprising a housing, an input and an output link connected to these links, and non-circular gear wheels with a closed initial curve (elliptical or derived from them are oval) meshed with each other. ).

The disadvantages of such a device are the need for large dimensions.

gears with an increase in the frequency of oscillations of the gear ratio, the difficulty of profiling and manufacturing non-circular gears, as well as the inability to adjust the amplitude of the oscillations of the gear ratio.

A device for communicating rotational motion with a periodically varying gear ratio is known, comprising a housing, an input and output link, a planetary gear, including a central wheel and a carrier with a satellite, the shaft of which is rotatably mounted in the navigator. The planetary transmission contains two lars of gear non-circular wheels: a driving central satellite wheel and a driven central wheel XI

-N

eight

s go

forest satellite The axis of the satellite shaft is parallel to the axis of the input and output links.

The disadvantages of this device are limited functionality, since it does not provide the ability to adjust the frequency and amplitude of the gear ratio. In addition, non-circular gears are difficult to shape and manufacture, as well as to ensure the joint operation of such wheels during operation.

The purpose of the invention is to enhance the functionality by adjusting the gear ratio.

The present invention improves the versatility of the device and simplifies its manufacture.

The goal is achieved by the fact that in the device the central wheel of the planetary gear is installed in the housing, a fork is made at the output link of the device, a swinging washer with two oppositely directed spikes connected with the fork of the output link is installed on the satellite shaft of the planetary mechanism, and the carrier is connected with the input link, while the axes of the input and output links, the central wheel, the satellite shaft and the spikes of the swinging washer intersect in a common center. The central wheel is pivotally mounted. perpendicular to the axis of the input link and spring-loaded relative to the housing; on the input link there is a fork, and the carrier has two opposing spikes pivotally connected to the input link fork, and the axis of the carrier spikes passes through a common center.

Fig, 1 shows a device, a longitudinal section; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one; in fig. 4 shows the dependence of the angle of rotation of the output link of the device on the angle of rotation of the input link and the kinematic diagram of the device.

A device for communicating rotational motion with a periodically varying gear ratio comprises a split housing 1 in which input 2 and output 3 shafts are mounted, mounted in bearings 4 and 5, respectively, and equipped with forks b and 7 with coaxial holes in the lugs. Two radial, oppositely directed spikes 8 led 9, fitted with bearings 10, are inserted into the openings of the plug b of the input shaft 2. The holes 11 have a carrier, the axis of which is perpendicular to the axis of the studs 8, in bearings 12 there is a splined shaft 13, which has a conical head at the ends of the slots

14, and at the other end on the bearing 15 - a conical satellite 16

Satellites 14 and 16 are engaged with a conical central wheel 17 rigidly mounted on the end wall of a glass 18 equipped with two radial oppositely directed hollow spikes 19 inserted into sleeves 20 of housing 1. The sleeves 2Q are rigidly connected to the housing, fitted with internal splines and closed with caps 21. Each hollow spike 19 is also provided with internal splines, into which the splined end of the torsion 22 is inserted. Its second end (also splined) is inserted into the internal splines of the corresponding sleeve 20.

The central wheel 17, the satellites 14 and 16, the shaft 13 and the carrier 9 form a planetary mechanism,

The splines of the middle part of the shaft 13 are worn with a washer, containing an inner sleeve 23 with internal splines and an outer sleeve 25 connected to it by means of two bearings 24 and provided with two radial

opposing spikes 26. On the shaft 13 between the sleeve 23 and the bearings 12 were installed spacer sleeves 27. The sleeve 25 is fixed on the bearings 24 retaining rings 28.

The studs 26 are inserted into the holes of the lugs of the plug 7 of the output shaft 3 and are equipped with bearings 29 mounted on these holes and fixed by retaining rings.

The axes of the input and output (3) shafts, the shaft 13 of the satellites, the studs 26 of the swinging washer, the studs 8 drove, the studs 19 of the cup 18 and the central wheel 17 intersect in a common center. The axis of the studs 19 is perpendicular to the axis of the input shaft 2.

The device works as follows.

The input shaft 2 rotates uniformly from the drive and the fork 6 rotates the carrier 9, which causes the shaft 13 to rotate, and with it the satellites 14 and 16, as well as the sleeve 25 of the rocking washer. The satellite 14, rolling around the central wheel 17, rotates the shaft 13, and with it the inner sleeve 23 of the swash plate, which, when rotated, causes the outer sleeve 25 to describe the conical surface (precess). Consequently, in any plane passing through the axis of the satellite shaft 13, the axis of the sleeve 25 oscillates during one revolution of the shaft 13 by an angle equal to twice the angle between the said axes. The rotation of the satellite shaft 13 around the axis of the input shaft 2 is completely transmitted to the sleeve 25 thus participating in two movements simultaneously - in rotation around the axis of the input shaft 2 and in the procession around the axis of the shaft 13 of the satellites. Output shaft 3 is transmitted resulting rotation, consisting of a uniform rotation of the input shaft 2 and oscillating spikes 26 of the sleeve 25 around the axis of the output shaft 2, It is described by the expression

. tg i farctg cos QMg 00 ROUTE p + arctg (1)

where dit is the angle of rotation of the output shaft; p is the angle of rotation of the input shaft;

do is the angle between the axis of the swinging washer and the axis of the satellite shaft;

I- gear ratio of a pair of central wheel - satellite;

and - the angle between the axis of the Central wheel and the axis of the input shaft.

FIG. Figure 4 shows the dependence of the angle Х on the angle р for various combinations of parameters 50, i and a. From a comparison of the curves (i 2; (30 15 °; a 0 °) and (I 4; 60 15 °; a 0 °) it can be seen that the number of periods of oscillation of the angle of rotation of the output shaft 3 is equal to the gear ratio I. From the comparison of the curves ( I 4; 50 15 °; a 0e) and (i 4; 50 15 °; a 30 °) shows the influence of the angle a on the axis of the central wheel 17 to the axis of the input shaft 2.

The satellites 14 and 16, rolling on the central wheel 17, provide automatic installation of the shaft 13 and the carrier 9 at an angle depending on the angle of installation of the central wheel to the axis of the input shaft 2 and the angle of rotation of this shaft, while the carrier 9 oscillates around axes of the spikes 8. The required inclination of the central wheel is established by interchanging the splines of the torsions 22 in the splines of the sleeves 20 or hollow spikes 19. The inclined position of the central wheel is shown by dashed lines in FIG. 2. When a dynamic overload occurs on the output shaft associated with its acceleration when the angular velocity fluctuates, the torsions 22 of the spring and the central wheel 17 change the angle of tilt, resulting in a reduction in the dynamic loads on the shaft. Also see

device operation and at the moments of change

sign of the angular acceleration of the output shaft 3

The device is reversible, i. E.

the output shaft can be input, connected to the drive, and the output - input, while all the patterns of operation of the device are preserved. The device can also operate in the conversion mode of non-uniform rotation into uniform,

For example, in reciprocating engines of internal combustion, in piston pumps, etc. According to the invention, embodiments of individual elements of the device are possible. For example, a planetary gear.

can be made friction; satellite 14 is integral with shaft 13; torsions 22 can be replaced by double-sided spring dampers; the device body can be made integral with

Claims (2)

1. A device for communicating rotational motion with a periodically varying gear ratio, comprising a housing, an input and output link, and a planetary gear, including a central wheel and a carrier with a satellite, the shaft of which is rotatably mounted in the carrier, the purpose of extending the functionality by adjusting the gear ratio, the central wheel is installed in the housing, a fork is made on the output link, a swinging washer with two anti-knobs is installed on the satellite shaft The pressure spikes pivotally coupled to the output link fork, a carrier associated with an input link and the axis of the input and output units, a central wheel, the satellite shaft spines and swashplate intersect generally center. 2. The device according to claim 1, characterized in that the central wheel is mounted rotatably perpendicular to the axis of the input link and is spring-loaded relative to the housing, a fork is made on the input link, and the carrier has two opposing spikes pivotally connected to the input link fork , while the axis of thorns drove passes through a common center 1 Bl dd g gpf 2S80Sh 90