RU19564U1 - VARIABLE VARIATOR - Google Patents

Abstract

An infinitely variable variator comprising input and output shafts, a housing inside which central ring elements and drive disks are mounted, between which satellites are arranged for rotation, axial and radial movement and interaction with central ring elements, drive disks and with a carrier, characterized in that the contacting surfaces of the central annular elements and the drive disks interacting with the satellites are made with bevels, which make it possible to increase their contact surface, and The spine of the input and output shaft is provided by their telescopic connection using at least one common support in the form of a needle bearing.

Description

Stepless variator. F 16 H 15/52; 15/14.

The stepless variator is intended for use in drives of various machines and mechanisms where smooth (stepless) speed control of the output shaft is required.

The utility model relates to the field of engineering and machine parts and can be used both in general engineering and for stepless regulation of the number of revolutions of the output shaft of various other mechanisms.

A stepless transmission is known according to the application of the Federal Republic of Germany No. OS 38 04 648 (see “Inventions of the World, issue 93, No. 9, Moscow, 1989, p. 36), with an input and output. The transmission has a carrier and satellites mounted on it with the possibility of rotation. Satellites are placed on three supports with rolling surfaces concentric with respect to the carrier. And one of the supports is at least axially displaceable to regulate the gear ratio, and a servo arrangement is provided for axial displacement. And one or two supports are placed with the possibility of rotation and connection with the input and output. The axis of rotation of the satellites are rotatable in the planes passing through them, and three corresponding contact surfaces of the supports. The circumferential surfaces of each satellite have such a shape that, by axial movement of the support, the satellite can be rotated while maintaining the fit of the supports. The disadvantage of this design is the significant amount of slippage of the satellites and possible jamming and vibration due to the small contact surface of the satellite support and the skew during rotation of the satellites.

2001103997

399 A continuously variable transmission is known according to the application EPONO 290400 (see

"Inventions of the world, issue 93, No. 12, Moscow, 1989, p. 34), containing coaxial input and output shafts and a number of conical disks spaced around the circumference, inside which parts are clamped between two opposite leading ring elements connected to the input shaft. Two opposing guide ring elements, mounted on a key on the output shaft, clamp the outer parts of the discs, which transmit corresponding movement to them. The axis of the discs is mounted with the possibility of rotation and sliding movement in the transverse sockets on two coaxial adjustable elements. Changing the relative angular position of the elements provides for the regulation of the radial position of the disks and, therefore, the speed of the output shaft. The disadvantage of this design is the significant amount of slippage of the disks and increased vibration due to the small contact surface and the insufficient alignment of the input and output shaft.

The design of the variator is known - see the patent of R. F. No. 2091636 C. R 16H 15/14; 15/52; 55 / 32.1997., Containing packets of beaded disks with external and internal touch and packages of intermediate disks installed with the possibility of interaction with the beaded disks and with the possibility of movement relative to them. In this case, the working surface of the flange disks is made convex, and parts of the working surface of the intermediate disks are concave.

The design of a multi-disk variator is known - see the patent of R.F. No. 2091638 C. F16H 15/52; 15/14, 1997 - adopted by the authors for a prototype, containing two central wheels and axially displaced packages of beaded disks mounted on them with one outer touch and one inner touch on the other. The swivel arms are pivotally mounted on the carrier. The axles are mounted on rotary levers with the possibility of rotation. The axes are equipped with packages of conical disks intended for interaction with packages of beaded disks.

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The thrust elements of the automatic tensioning device are installed with the possibility of interaction with all of the flanged discs, and the interaction zones of the flanged discs with the corresponding conical discs and thrust elements are located on different sides of the flanged discs and in circles of different diameters. The disadvantage of the design adopted for the prototype is the significant amount of slippage of packs of beaded discs in interaction with the central wheels, possible jamming and excessive vibration due to:

1. Small contact surface of the central wheel - beaded disk;

2. Decrease in effort in compression of central wheels;

3. The lack of alignment of the input and output shafts.

The essence of the utility model: a stepless variator contains an input and output shafts, a housing, inside which two central ring elements and two drive disks are installed. Between the central ring elements and the driving discs, satellites (conical discs) are installed that interact with them and have the ability to rotate, axial and radial movement. The axles of the satellites are pivotally mounted on the carrier, and the drive discs are on the input shaft and spring-loaded. The input and output shafts are coaxial and have a telescopic connection. The central ring elements have thrust elements of an automatic spring-loaded device in the form of springs, bearings and a separator with balls, ensuring their interaction with satellites. The carrier is fixed rigidly on the output shaft.

The technical result of the utility model is to reduce the slippage of the satellites, eliminate the possibility of jamming them, ensure the alignment of the input and output shafts, as well as reduce the vibration of the entire mechanism.

The specified technical result is achieved by the fact that the contacting surfaces of the central annular elements and the driving disks interacting with the satellites are made with bevels, which make it possible to increase their contact surface. and the alignment of the input and output shaft is provided by their telescopic connection

using at least one common support in the form of a needle bearing. Thus, the distinguishing features of the proposed utility model are:

1. A constructive form of execution of the working surfaces of the edges (contacting surfaces) of the drive discs and the central annular elements in the form of bevels. The bevel value is h 1 ± 0.2 mm. at an angle a 4 ° ± 5. These values were obtained during bench testing of a prototype of a stepless variator, experimental work;

2. The telescopic arrangement of the input and output shaft of the variator using at least one common support.

In FIG. 1 shows a sectional view of a stepless variator (general view).

In FIG. Figure 2 shows the working edge of the drive discs and the central core elements, in contact with the satellite.

In FIG. 3 is a view of “A of FIG. 1.-control mechanism of a stepless variator.

A useful model is a stepless variator, consists of a housing 1, two side covers 2 and 3, an input shaft 4 and an output shaft 5 installed in pillow blocks 6, drive disks 7 and 8 connected by a key 9 to the input shaft, and satellites 10 made for integral with the axis, and the central ring elements 11 and 12. The satellites, central ring elements, drive discs and ring support are made of heat treated steel 111X15. The central annular element 11 is fixed in the housing fixedly, and the central annular element 12 has the ability to slightly move and rotate its curved surface along the separator with balls 18. The drive discs are pressed by springs 13. The satellites on the outer surface are simultaneously clamped by the edges of the drive discs and central ring elements, and their axes are located in the holes of the sliders 14, which can move in the grooves of the carrier 15

4 in the radial direction, while the carrier is directly connected to the exit

shaft. The central annular elements are automatically spring-loaded through a group of springs 16, a support 17, a separator with balls 18 adjacent to the profiled surfaces of the support and to the central annular element 12. The leash 19 is connected to the central annular element 12 and to the coupling 20 sitting on the spindle 21, which installed in the upper arm 22 in the bearings 23 and 24, forming a control unit of a stepless variator. To limit the clutch stroke, stops 25 are provided. The input and output shafts have at least one common support in the form of a needle podshpshshka 26. Industrial oil is poured into the internal cavity of the variator (approximately one third of its height). To seal the output of the shafts, sealing devices 27 are provided in the form of cuffs.

The operation of the continuously variable variator is as follows. When loading the input shaft with a torque, it is distributed among the driving, driven, and brake links. The driving disks 7 and 8, rotating together with the input shaft 4, carry satellites 10 behind them, which begin to run around the central annular elements 11 and 12 and rotate around their own axes in the sliders 14, moving in the radial direction and dragging the carrier 15, and with it, and the output shaft 5. The radial movement of the satellites 10 in this case, and therefore the speed of the output shaft 5, will depend on the position of the central ring elements 11 and 12, that is, the gap between them. The speed control is carried out with the help of a screw 21, rotating which, the coupling 20 is moved and act through the lead 19 on the central annular element 12. The angular and axial movement of the central annular element 12 changes the gap between it and the central annular element 11 and, accordingly, changes the radial the position of the satellites 10. This ensures stepless speed control of the variator on the output shaft 5.

5 The required interval for controlling the speed of the variator is set by the stops 25.

The enterprise has made a prototype of a utility model, a stepless variator, which has passed bench tests. To increase the contact surfaces between the satellites, the driving disks and the central ring elements, the edges of the latter (disks and rings) were made with bevels of 0.2 mm and an angle of 4 ° ± 5, and the surfaces of the satellites with respect to their axes were made with an angle of inclination (all sizes obtained empirically); shafts (input-output) were made coaxially in the form of a telescopic connection with one common support. As bench tests showed, this design allowed to significantly reduce the vibration and noise of the entire device and reduce the slippage of satellites by 8-12% against the prototype. The stepless variator will find application at our enterprise in the manufacture of the manufacture of caramel lines for confectionery factories.

The number of satellites in stepless variators can vary from 4 to 7 depending on the transmitted power: high power - a larger number of satellites.

The variator can be made in the form of a motor - variator. In this case, an additional device will be required on the input shaft side: a housing with a gearbox and an electric motor.

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Claims (1)

An infinitely variable variator comprising input and output shafts, a housing inside which central ring elements and drive disks are mounted, between which satellites are arranged for rotation, axial and radial movement and interaction with central ring elements, drive disks and with a carrier, characterized in that the contacting surfaces of the central annular elements and the drive disks interacting with the satellites are made with bevels, which make it possible to increase their contact surface, and The spine of the input and output shaft is provided by their telescopic connection using at least one common support in the form of a needle bearing.