SU1216120A1 - Elevator drive - Google Patents

Description

The invention relates to the field of hoisting-and-transport machinery, in particular, to hoist drives.

The purpose of the invention is to increase the drive performance by increasing its drive capacity.

FIG. 1 shows a lift, general view; in fig. 2 - the same, side view; in fig. 3 - drive, cross section; in fig. 4 - flexible connection, longitudinal section; in fig. 5 - kinematics of interaction of drive elements.

The lift drive contains a pulley 1 rolling with a multi-roll carrier 2, covered by a flexible coupling 3, connected to a lifting vessel (Grp) and counterweight (Gnp), the driving motor 4, coupled by clutch 5 to the drive shaft b, on which installed drove 2, and a mechanical brake 7. All drive assemblies are mounted on the support beam 8.

The rolling wheel 2 consists of two coaxial toothed disks 9, and the flexible coupling is an endless toothed belt 10 consisting of two layers. Moreover, the narrow inner layer 11 enters with its teeth into the hollows of the wide outer branch 12 of the same belt 10. These branches are interconnected, for example, by rivets 13.

The layer of the belt 11 with a smooth back part contacts with the rollers 14 of the carrier 2 placed on the axes 15. The layer of the belt 12 contacts with the teeth of the disks 9 with its teeth. The toothed belt 10 is reinforced with steel cables 16.

The gear discs 9 are fixed in the supports 17 by means of the keys 18.

The elevator drive works as follows.

When the multi-roller carrier 2 rotates counterclockwise with the angular frequency P1 in the flexible traction coupling 3, an elastic deformation wave arises, which causes it to slowly roll over the rolling wheel 1 with the coaxial gear teeth 9 and the outer branch 12

Cat belt. The inner layer 11 synchronously moves with the outer branch due to the gearing between them and interacts with the rollers 14 of the carrier 2. Thus, the load is lifted and the counterweight is lowered.

The speed of movement of the flexible connection (load) is based on the following considerations.

In one revolution, the carrier bends the bond 3 moves to the distance

LSV 1-L-7-I t,

where is the number of rollers 14 drove 2; AZ is the difference between the number of teeth in the perimeter acdb and the support arc of rolling ab (Fig. 5), i.e.

AZ - Rob

lt

where n acdb; Doe ab are the values depending on the radius R of the circumference of the centers of rotation of the rollers; diameter DO initial circumference of coaxial disks 9; the girth angle 7 by the flexible connection of these disks in the zone of one roller and the fictitious radius of the GF roller, which is found from the expression

gf g + s,

where g is the actual radius of the roller (Fig. 1);

b-conditional thickness of the belt (Fig. 4).

The value of AZ can only be an integer (, 2, ..., 3).

The speed of lifting (lowering) the load is from the obvious expression

or

9gr Dsv P1, Egr 1-P | lt l-z-10,

where P1 is the angular frequency of rotation of the carrier,

rpm; W - engagement module, mm.

/ //. / 2. /

with I

ssgagi3SsgeSKEss35

. 2

fig.Z

FIG.

. d

Compiled by l. Lapenko

Editor T KugryshevaTehred I. VeresKorrektor O. Lugova

Order 954/25 Circulation 800 Subscription

VNIIPI USSR State Committee

for inventions and discoveries

113035, Moscow, Zh-35, Raushsk nab. 4/5

Branch PPP "Pateit, Uzhgorod, st. Project, 4

Claims (1)

A LIFT DRIVE containing a rolling pulley consisting of two coaxial disks and a multi-roller carrier placed between them, covered by a flexible traction coupling, one end of which is connected to a lifting vessel and the other to a counterweight, and a drive motor with a mechanical brake mounted on a support beam characterized in that, in order to increase the performance of the drive by increasing its traction ability, teeth are made on the outer surface of the coaxial disks, while the flexible traction coupling is a two-layer a flat belt with teeth made on one side adjacent to one another, the belt layers having different widths and its wider layer meshing with the coaxial disks, and the other layer resting on a multi-roller carrier. FIG. 1