SU1216522A1 - Pulley of belt transmission - Google Patents

Description

The invention relates to mechanical engineering, in particular to belt drives, and can be used in various fields of technology. .

The purpose of the invention is to increase the pulley capacity of the pulley.

FIG. 1 shows a pulley rim, axial section; FIG. 2 is a section A-A in FIG. one; in fig. 3 is a view B in FIG. 1j in FIG. 4 shows an embodiment of a pulley rim with a device for adjusting the curvature of the rods.

The device contains a hub (not shown) and evenly located on the outer working surface of the rim 1 of the pulley in the longitudinal grooves 2 lining in the form of elastic rods 3 of spring-spring steel with a curved middle part 4 placed and fixed in the grooves 2 protruding beyond the outer working surface the rim 1 and interacting with the belt 5. The rim of the pulley may have a device for adjusting the curvature of the middle part 4 of the elastic rods 3, made, for example, in the form of a threaded ring 6 mounted on one of the ends of the and acting on the pulley and the end face of each elastic rod 3.

Pulley works as follows

When the pulley is rotated, the belt 5 runs over the working surface of the rim 1 of the pulley with the elongated protruding rods 3, while bending

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This middle part 4 of the elastic rods 3, deforming in the radial direction within the elastic deformation, with a force acts 5 on the inner surface of the belt 5, thereby facilitating self-tensioning of the transmission. At the same time, the middle part 4 of the elastic rods 3, protruding outwards, gives a bulge to the rim of the pulley, which makes it impossible for the belt 5 to go off the rim 1. The contact surface of the belt 5 with the pulley rim occurs both on the outer working surface of the rim 1 of the pulley, and protruding elastic rods m 3, which increases the traction ability of the belt drive.

Depending on the acting force in the belt transmission, the position of the elastic rods 3 in the longitudinal grooves 2 can vary, while the profile of the middle part 4 of the rods 3 becomes more or less convex, and with the force from the belt 5 more elastic force of the rods 3 can be completely recessed in the longitudinal grooves 2 rim pulley. When the threaded ring 6 rotates, the latter, moving in the longitudinal direction and acting on the mountaineer of each elastic rod / 3, changes the curvature of the middle part 4, which helps to compensate for belt stretch - 5, as well as smooth the starting dynamics of the belt drive.

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Editor I. Nikolaichuk

Compiled by O. Klimov

Tehred S. Migunova Proofreader V. But ha

Order 983/45 Circulation 880 Subscription

VNYIPI USSR State Committee

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

Branch PChT Patent, Uzhgorod, st. Project, 4

Claims (2)

1. Belt drive pulley, comprising a hub and a rim with overlays uniformly located and fixed on a cylindrical surface along it, characterized in that, in order to increase traction ability, grooves are made on the cylindrical surface, the overlays are placed and fixed in them and made in in the form of elastic rods, the middle part of which is curved, and the pulley is equipped with a device for adjusting the curvature of elastic rods. 2. Pulley in π. 1, characterized in that the device for adjusting the curvature of the elastic rods is made in the form of a ring interacting with the ends of each elastic rod and connected with one of the ends of the rim by a threaded connection. SU 1216522 ' I