SU1523793A1 - Friction variable-speed drive - Google Patents

Abstract

The invention relates to mechanical engineering and can be used in continuously variable transmissions. The aim of the invention is to increase the reliability of the variator. When moving from the drive of the intermediate rollers 18 relative to the driving and driven discs, a continuously variable change in the gear ratio occurs. When the gap between the leading and the driven disks increases, the yoke 15 with carriages 11, shaft 17 and intermediate rollers 18 under the action of springs 19 moves in the slots 14 and along the supporting surfaces 13 of the frame 10 to one or the other of the friction disks until the pressure between the friction disks and intermediate rollers. 3 il.

Description

one

(21) 4244877 / 25-28

(22) 15.05.87

(46) 23,11,89, Bull. - 43

(71) Scientific and Production Association for the mechanization and automation of the production of machines for cotton growing Technologist

(72) I.A. Smirnov

(53) 621.839 (088.8)

(56) Pronin B.A., and Revkov G, A. Stepless klinoremennye and friction transmissions (variators), - M .: Mashinostroenie, 1967, p. 281, rice, 136,

(54) FREEZE VARIATOR

(57) The invention relates to mechanical engineering and can be used in

stepless gears. The aim of the invention is to increase the reliability of the variator. When moving from the drive of the intermediate rollers 18 relative to the drive and the driven disc, a continuously variable change in the gear ratio occurs. When the gap between the leading and the driven disks increases, the yoke 15 with carriages 11, shaft 17 and intermediate rollers 18 under the action of springs 19 moves in the slots 14 and along the supporting surfaces 13 of the frame 10 to one or the other of the friction disks until the pressure between the friction disks and intermediate rollers, 3 Il.

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OK

The invention relates to mechanical engineering and can be used in infinitely variable transmissions.

The purpose of the invention is to increase reliability by automatically obtaining reliable contact between the interacting friction surfaces in the event of wear or inaccurate manufacturing.

Fig about 1 shows a friction variator, a general view; in fig. 2 is a section A-A in FIG. one; FIG. 3 is a section BB in FIG. one.

The variator comprises a housing 1, on the front wall of which there is a mounted electric motor 2, carrying a drive disk 3 mounted on the shaft, and on the rear side — a gearbox 4 coaxial with the engine, having a disk 5 on the input shaft. Between the disks 3 and 5, the axes perpendicular to them are located formed by the running screws 6 installed in the housing 1.

The lead screws 6 through gears 7 and 8 are kinematically connected with each other and with an electric motor drive 9. The screw holes on the running screws 6 accommodate the frame 10 of the swivel and press device, carrying the carriages 11 with the rollers 1.2 interacting with the supporting surfaces 13 of the frame 10 and grooves 14 perpendicular to the face surfaces of the friction discs; mounted clip. 15, bearing on the bearings 16 located at the level of the axis of the disks 3 and 5, the shaft 17 with fixed intermediate rollers 18. The holder 15 is spring-loaded with respect to the carriages 11 around its own longitudinal axis by the springs 19 through the pins 20.

The variator works as follows.

When the shaft of the electric motor 2 with the drive disk 3 rotates, the rotation is transmitted to the driven disk 5 via intermediate rollers 18 and shaft 17. At the same time, the smallest number of revolutions on the driven shaft with disk 5 will correspond when one of the intermediate rollers 18 gets rotation from the smallest diameter of the driving disk 3 and transmits it through the shaft 17 and the second intermediate roller 18 to the maximum diameter of the driven disk 5.

0

five

0

five

For infinitely variable speed control while the gear is running, the motor 9 is turned on with the desired direction of rotation, and gear 7 is obtained. and 8 and spindle screws 6, on which a frame 10 with carriages 11, a yoke 15, a shaft 17, rollers 18 moves along the threads.

The maximum rotational speed on the driven shaft will be reached when one ;; from the intermediate rollers 18 receives rotation from the largest diameter of the drive disk 3 and transmits it through the shaft 17 and the second, intermediate roller 18 to the minimum diameter of the driven disk 5.

If there are inaccuracies made in the manufacture of individual parts and the entire variator, in the form of non-parallelism of the surfaces of the friction disks 3 and 5, their uneven distance from the guide chassis 6, or when wear appears on the disks 3 and 5 in the form of annular grooves, during the transition from one speed to another, compensating for enumeration, numerical errors and ensuring the normal operation of the variator is carried out automatically.

This is achieved due to the fact that the cage 15 with the carriages 11, the shaft 17 and the daily rollers 18 under the action of the springs 19 move in the grooves 14 and along the supporting surfaces 13 of the frame 10 to one or the other of the friction discs 3 and 5 friction discs and intermediate rollers.

Claims (1)

Formula Fig. eteny A friction variator comprising a housing in which the driving and driven shafts with friction disks are installed in parallel, interacting with each other through intermediate rollers mounted on the shaft and pressed against the diametrically opposite face of the friction disks, the device turning and pressing the latter to the disks and connected to It has a straight-line drive parallel to the face surface of 5 surfaces of the friction discs, characterized in that, in order to increase reliability, the device is rotated and pressed performed at 0 five 0 0 The form of a frame with grooves perpendicular to the face surfaces of friction discs and supporting surfaces of two carriages with rollers, one of the k6-. They are placed in the grooves, while others interact with the supporting surfaces and the intermediate roller carrier, which is connected to the carriages and can be rotated around an axis parallel to the end surfaces of the friction discs and is spring-loaded in the same direction. / f Fig. / /