SU1295098A1 - Device for tightening flexible members - Google Patents

Abstract

The invention relates to mechanical engineering and can be used to tension the flexible elements of drives of machines with flexible coupling. The purpose of the invention is to improve ease of operation by providing the possibility of infinitely variable adjustment of tension on the go. For this purpose, an eccentric 2 with a tension roller fixed on it 4 isceet frik74 (Lew co-eaten c phage.

Description

Surfaces mated with similar surfaces of the disk 8, which is associated with the holder 5 of the housing 1 by means of a free wheeling mechanism. To tighten the friction surfaces, use the screw 9 screwed into the threaded hole 7 of the eccentric 2 and having a turnkey head. When the screw 9 is rotated counterclockwise, the friction surfaces of the eccentric 2 and disc 8 are

The invention relates to machine building and can be used to tension the flexible elements of drives of machines with flexible coupling.

The purpose of the invention is to improve ease of operation by allowing infinite adjustment of the tension on the go.

FIG. 1 shows the proposed device, a longitudinal section; FIG. 2 is a view A of FIG. one.

The device for eccentric tensioning of flexible elements consists of a housing 1, inside which there is an eccentric 2 with an axis 3 mounted on it. The tension roller 4 is fixed on an axis. A freewheel mechanism 5 is rigidly attached to the housing 1. The eccentric 2 has a comic shoulder 6 and a central threaded hole 7. At the hub of the eccentric 2, a conical disk 8 is freely mounted, which with its cone mates with the shoulder 6 of the eccentric 2. A screw 9 threaded into the central boring hole 7 of the eccentric 2, threaded to the stop shoulder 10 and turnkey head. The direction of threading the screw 9 is chosen such that, under the influence of the tension moment, the disk 8 is pressed against the eccentric 2 (in Fig. 1, the right-hand thread). The yoke 5 is provided with a groove 11, decreasing in the direction of the tensioning torque (in Fig. 2 counterclockwise). In the groove laid wedge segment 12 and the spring 13, the outside closed ring kryakoy 14. Cage 5, disk 8 and

clinically affected. Due to this, it becomes possible to continue the unceasing adjustment of the tension force of the flexible elements on the go in the gears for

by turning the eccentric 2 or disc 8 in one direction or another, followed by fixing the new position of the eccentric 2 and disc 8 using a screw 9 and a free wheeling mechanism. 2 Il.

ABOUT

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the wedge segment 12 forms a free wheeling mechanism with the possibility of rotation of the disk 8 only in the direction opposite to the effect of the tension moment (in Fig. 2. in the clockwise direction).

The device for tensioning the flexible elements operates as follows.

For tensioning, the screw 9 is turned with a key worn on the head in the direction of the tension (in Fig. 2 clockwise). The screw 9 interacts along the thread of the hole 7 with the eccentric 2 and through the stop collar 10 with the disk 8. The eccentric 2 senses the oppositely directed torque of the tension of the flexible elements through the tension roller 4 and the axis 3, therefore the friction pair (eccentric 2 and disk 8) is clamped with a force proportional to this moment, and rotates together with the screw 9 relative to the holder 5 and the case 1. Due to the friction of the disk 8, the wedge segment 12 rises through the groove 11, deforms the bias spring 13, and does not resist to tension.

In the tensioned position, the key is removed from the head of the screw 9. Under the influence of the tension forces of the flexible elements, the friction pair remains clamped, and the wedge segment 12 under its own weight and (or) the action of the pressure spring 13 takes the initial position, jamming the disk 8 relative to the yoke 5 and an obstacle

31295098 4

turning the eccentric 2 towards the center of the friction pair, the eccentric 2 is a tension drop (in Fig. 2, the disk 8 is again tightened with the screw 9.

clock hand) ..

Claims (1)

Invention Formula To loosen the tension of the flexible elements, the screw 9 is rotated in the corresponding direction (counter-clockwise in FIG. 2). At the same time, the disk 8 cannot rotate together with the screw m 9 due to the wedging action of the wedge segment 12, and the eccentric 2 is braked by the friction effect on its shoulder 6 of the disk 8 cone. Under the action of flexible elements, the eccentric 2 rotates on the screw 9, and the device gaps, after A device for tensioning flexible elements, comprising a housing, an eccentric with a tension roller, which can be rotated in it, a disc mounted in the housing, forming a friction pair with the eccentric and fixing the last screw, characterized in that providing the possibility of infinitely variable tension adjustment on the run, the disk is mounted in the housing with the possibility of axial movement and is connected to the latter by means of a free wheeling mechanism. Vida 74 Editor I.Gorn Compiled by O. Klimov Tehred V. Kadar Order 601/40 Circulation 812 Subscription VNIIPI USSR State Committee for Inventions and Discoveries 4/5, Moscow, Zh-35, Raushsk nab. 113035 Production and printing company, Uzhgorod, st. Project, 4 Q3U2.Z Proofreader A.T. sko