SU1236234A1 - Friction variable-speed drive - Google Patents

Description

The invention relates to mechanical engineering and can be used as an element of drives for various machines, in particular, machine tools for various purposes.

The purpose of the invention is to increase the load capacity by increasing the contact area between the friction elements.

FIG. 1 shows the variator, general view; in fig. 2 shows section A-A in FIG. one; in fig. 3 is a view B in FIG. one.

The friction variator comprises a housing 1, a drive shaft 2 connected to the engine 3, the driven shafts 4 and 5, and a pair of sidewalls 6, 7 and 8, 9. The friction discs 10-13, mounted respectively on the sidewalls 6-9 parallel to each other, have the possibility of rotation in opposite directions and kinematically associated with the drive shaft 2. The friction discs 10 and 12 are connected with the drive shaft 2, respectively, by means of an asterisk 14, chain-, pi 15, asterisk 16 and asterisk 17, chain 18, asterisks 19. The friction discs 11 and 13 are connected with the drive shaft 2, respectively, by means of n 20 and 21, asterisks 22, chains 23, asterisks 24 and gears 25 and 26, asterisks 27, chains 28, asterisks 29. Gears 20 and 25 and asterisks 14 and 17 are rigidly fixed on shaft 2, gear 21 and asterisk 22 - on shaft 30, and gear 26 and sprocket 27 - on shaft 31. Sprockets 16, 24, 29 and 19 are rigidly fixed on the axes of the respective friction disks 10, G1, 13 and 12. The driven elements 32 and 33 interact respectively with friction discs 10, 11, and 12, 13, located between the ends of the latter. The variator is equipped with two control conical gear wheels 34 and 35, interconnected mechanics The control frame is made in the form of a handle 36 installed in the groove of the axis 37 of the gear 34 and having an arcuate bracket by means of which the handle 36 interacts through the shaft 38 and a pair of bevel gears 39 with a bevel gear 35. Two pairs of driven wheels 40

41 and 42, 43 are placed on corus 1. Slave 151e elements 32 and 33 cover each pair of 40, 41 and 42, 43 driven wheels and are made

in the form of a flexible link with rollers placed on it with the possibility of rotation and fixed from axial movement. The sides 6-9 are mounted on the drive shaft 2 with the ability

rotation, and the control wheels 34 and 35 are placed between the sidewalls of each pair 6, 7 and 8, 9 and interact with the sidewalls by means of the gear sectors 44 mounted on each

sidewall.

Friction variator works as follows.

The rotation from the engine 3 is transmitted to the gears 20 via the drive shaft 2.

and 25 and sprockets 14 and 17, and then converted into rotation of the friction discs 10-13 using chain and gear-chain transmissions. At the same time, the disks 10, 11 and 12, 13 rotate in the opposite directions. In the initial position, when the driven members are located in the center of each of the discs 10-13, the rollers of the driven members roll between the friction

disk: 1Uy and the translational movement of the slave element does not occur. When the handle 36 is rotated, either the bevel gears 34 and 35 are rotated, or only one of them. The rotation of the wheels 34 and 35 causes a rotation on the shaft 2 in mutually opposite directions: the sidewalls 6, 7 and 8, 9.

As a result, the friction discs 10, 11 and 12, 13 shift.

relative to the driven members 32 and 33. In this case, the rollers of the flexible members 32 and 33 receive forward movement, the flexible members 32 and 33 begin to move and result in the rotation of the pair of driven wheels 40, 41 and 42, 43. The greater displacement the friction discs receive, the more speed of rotation of the driven wheels and, accordingly, the driven shafts 4 and 5. When

this may produce different

rotational speeds of each pair of driven wheels and their rotation in opposite directions.

Vidb

fig.Z

Editor B.Papy

Compiled by V.Karasev

Tehred M. Proofreader M. Maksiminets

Order 3076 / 39Ction 880 Subscription

VNIIPY USSR State Committee

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

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

Claims (1)

FRICTION VARIATOR, comprising a housing, drive and driven shafts, pairs of sidewalls, friction discs mounted on the sidewalls parallel to the shaft, and driven elements interacting with friction discs, characterized in that, in order to increase the load capacity, it is equipped with two steering wheels, interconnected by a control mechanism, two pairs of driven wheels, located on the housing and mounted on the driven shafts, each driven element is made in the form of flexible communication covering each pair of driven wheels with a size mounted on it with the possibility of rotation and fixed from axial movement of the rollers, the sidewalls are mounted on the drive shaft rotatably to each other with the possibility of rotation in opposite directions and kinematically connected with the leading company, and the steering wheels are located between the sides of each pair and interact with them. f