SU1232883A1 - Stepless power transmission - Google Patents

Description

2. Transmission in accordance with claim 1, in connection with the fact that, in order to expand the range of adjustment, it is equipped with an additional output shaft, a cam adjuster and a variator, including two pulleys with stationary and. movable discs interconnected by the regulating invention. The invention relates to engineering and can be used mainly in automatic continuously variable transmissions of vehicles.

The purpose of the invention is to increase the reliability of operation and to expand the range of adjustment by increasing the service life of the V-belts by maintaining the constant tension of the belts in all modes and reducing their transfer during operation.

Figure 1 shows the transmission section; Fig. 2 - the same, with an additional output shaft, a cam controller and a variator with a regulating mechanism.

The transmission contains a drive shaft I, on which a rigid support is fixed. Visional / disk 2 and movable disk 3 of a continuously variable transmission pulley. Each of disks 2 and 3 are equipped with bearings with limiting sleeves 4 with a tapered profile for a V-belt 5. On the drive shaft 1 a centrifugal-lever regulator 6 is installed for axial movement of the moving disk 3, to which is attached a pulley 7j consisting of adjustable and non-adjustable discs. The drive pulley of the transmission through V-belt 5 is connected to the driven pulley mounted on the driven shaft 8 and containing a fixed disk 9 rigidly mounted on the driven shaft 8, and the movable disk 10, the latter rigidly connected to the ring 11 by means of t g 12, evenly spaced along circumference and passing through holes drilled in a fixed disk 9; An elastic element 13 is installed between the fixed disk 9 and the ring 11 (for example, a cylindrical steel spring 23 28883

Haniem, spring-loaded along the axles of the pulleys, one of the pulleys is mounted on the driven shaft, the second is on the additional output shaft, and on the last there is a cam controller, which is kinematically connected with the regulator, its mechanism,

on) . The ring 11 by means of a thrust bearing 14 is connected with the ring 5, which is in contact with the levers of the centrifugal-lever regulator 16 for the axial movement of the movable disk 10 of the driven pulley mounted on the sleeve 17 rotating on the bearings I8 on the driven shaft 8 and having a pulley 19, consisting of adjustable and unregulated discs and connected via a V-belt 20 to a pulley 7.

The gear ratio of the transmission, kinematically linking centrifugal-lever gears 6 and 16, is chosen equal to one. The driven shaft 8 can be mounted on bearings in eccentric sleeves 21, which can be fixed to the gear housing 22 and fixed therein by known means (for example, by means of seals on the sleeves and hollows on the housing; with the aid of zips and bolts). I

To increase the transmission control range, it can be equipped with an additional output shaft 23 with a cam controller 2D and a variator mounted on it, including two pulleys with stationary 25 and sub-1: 26 disks, interconnected by a regulating mechanism, spring-loaded along the axes of the pulleys. The adjustment mechanism is made in the form of a slider 27 placed in bearings of the housing 28 and rigidly coupled forks 29 interacting with movable pulley disks 25 through thrust bearings. The slider 27 is spring-loaded with the elastic element 30 and is kinematically connected through the thrust bearings with the movable cam-controller part 24 with the help of

For example, a two-shouldered lever 31 hinged to the housing 22. The bearings of the slider 27 and the output shaft 23 can be installed in eccentric bushings 32 and 33 by analogy with the installation of bearings of the driven shaft 8, One of the variator pulleys is mounted on the shaft 8, the second - on the additional output shaft 23, and between the pulley disks there is a V-belt 34.

The transmission works as follows.

First, the permutation of the eccentric bushings 21 and 33 establishes the initially specified tension of the V-belts 5 and 34 in both transmission circuits (Figs. 1 and 2). The drive shaft 1 is then rotated, which simultaneously rotates the drive pulley and the centrifugal lever controllers 6 and 16, which are interconnected by a V-belt 20, which surrounds the pulleys 7 and 19 of both controllers.

At the same time, at idling, the V-belt 5 with its side surfaces is placed in the limiting bushings 4 and does not interact with the disks 2 and 3 of the driving pulley, as a result of which the transfer of the payload from the driving to the driven pulleys does not occur. With an increase in the rotational speed of the driving pulley, the centrifugal-lever regulator 6 moves the movable disk 3 until it touches the V-belt 5. Simultaneously, through the pulley 7 and V-belt 20, the rotation is transmitted to the pulley 19, causing

an increase in the speed of rotation of the centrifugal-lever controller 16, which with its levers acts through the ring 15, the saddle bearing 14, the ring 11 and the gy 12 on the movable

the disk 10, moving it to the right, squeezing up the element 13 and allowing the V-belt 5 to move closer to the axis of rotation of the slave

pulley.

Upon further movement of the movable disk 3 to the right, the crank belt 5 locks1.1 between the disks 2 and 3 of the drive pulley and transfers the payload to the driven pulley of the transmission, and hence to the driven shaft 8. From the driven shaft 8, the rotation is transmitted by means of the placed between the disks 25 and 26 V-belt 34 day off

shaft 23 with a cam regulator 24 placed on it, which under the action of a load applied to the output shaft 23 creates an additional axial force with its moving part

pressing the movable discs 26 of the variator pulleys with the help of a two-sided drill 31, slider 27 and forks 29, thereby changing the overall gear ratio of the transmission depending on

rotational speeds of shafts 1 and 8 and the load on the output shaft 23. When the load on the output shaft 23 and the axial force of the cam regulator 24 on the moving disks of the pulleys 26 is increased, the elastic element 30 moves the slider 27 to the moving disks 26 to the right, thus reducing In other words, the gear ratio is set by the cam controller 24 and the centrifugal-lever regulators 6 and 16.

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Editor N. Yatsola

Compiled by O. Klimov

Tehred I.PopoogGCH Proofreader A.T.

Order 2753/37, Circulation 880 Subscription

VNIIPI USSR State Committee

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

Production and printing pred1: Ry tie, the city of Uzhg on a clan, Project St., 4

Claims (2)

1. A stepless power transmission, comprising drive and driven shafts, pulleys mounted on them with fixed and movable disks, a movable disk of one of the pulleys is spring-loaded to a fixed one, a belt covering pulleys and pressure devices interacting with movable disks, characterized in that, for the purpose of increase reliability, the pressure devices of each pulley are centrifugal-lever regulators, one of which is rigidly connected to the drive shaft, and the other is mounted on the driven shaft with the possibility of rotation and kin mathematically connected to the first gear having a gear ratio of one. Figure 1 2. The transmission according to claim 1, characterized in that, in order to expand the control range, it is equipped with an additional output shaft, cam control and variator, including two pulleys with fixed and. movable disks interconnected by a regulating mechanism, spring-loaded along the axes of the pulleys, one of the pulleys is mounted on the driven shaft, the second on the additional output shaft, and the cam is placed on the latter, kinematically connected with the regulating mechanism.