SU1195094A1 - Flexible coupling transmission - Google Patents

Abstract

TRANSMISSION WITH A FLEXIBLE CONNECTION, including an adjustable pulley containing two disks, the first of which is fixed from angular and axial movements and has on the end surface radial grooves installed between the disks with the possibility of radial movement of sectors having on both end surfaces protrusions interacting with radial grooves and a second disk, characterized in that, for the purpose of automatic adjustment, the force of the tension of the flexible element, the second disk is mounted with the possibility of angular rotation and has filled on the end surface, involute grooves interacting with the protrusions of the sectors .. (L: o JV; o

Description

The invention relates to mechanical engineering, and can be used in machine drives for transmitting torque by flexible couplings.

The purpose of the invention is the automatic adjustment of the tension force of a flexible element, working in tandem with a pulley. _. :

.Na. · FIG E’G depicts an adjustable pulley with flexible coupling, obZy view; in FIG. 2 .. - / section AA on

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IU l * ί Device; includes an adjustable shktsv containing a disk 1, fixed from angular rotation and axial movement, a disk 2 mounted with the possibility of angular rotation, sectors 3 with protrusions 4, installed between the disks 1 and 2. The disk 1 has radial grooves 5 interacting with the protrusions of the sectors 3, and the disk 2 has involute grooves 6 interacting with the protrusions of the sectors 3. The outer surface of the sectors 3 corresponds to the working surface of a flexible element that is paired with a pulley, and can be any of the known.

The transmission by screw coupling with an adjustable pulley works as follows.

Before starting operation, the belt is pre-tensioned (not shown). When the pulley rotates, the centrifugal force acts on the pulley sectors 3, as a result of which the sectors 3 move in the radial direction, increasing the force of the belt attaching.

Simultaneously with the movement of the sectors 3 along their grooves, the disk 2 rotates in the angular direction due to the interaction of the protrusions 4 with the involute grooves 6. The movement of the sectors 3 occurs until the centrifugal force and the belt tension force are balanced.

Due to the fact that the centrifugal force is proportional to the square of the angular velocity, and the resistance to rotation is proportional to the first degree of the angular velocity, the grooves of the disk 2 are made in the form of an involute. Thus, the proposed pulley design allows automatic adjustment of the tension of the belt, simplifies the operation of the device with such a pulley.

figure 2

VNIIIPI Order 7400/40

Circulation 897 Subscription

Branch of PPP Patent,

Uzhhorod, Project 4,

Claims (1)

FLEXIBLE TRANSMISSION, including an adjustable pulley containing two disks, the first of which is fixed from angular and axial movements and has radial grooves on the end surface mounted between the disks with the possibility of radial movement of sectors * having protrusions on both end surfaces interacting with radial grooves and a second disk, characterized in that, for the purpose of automatic adjustment, the force · tension of the flexible element, the second disk is mounted with the possibility of angular rotation and has nnye on the end surface involute grooves cooperating with protrusions sectors .. Figure 1 1195094.