SU1293423A1 - Pulley of self-tightening gearing with flexible member - Google Patents

Abstract

The invention relates to mechanical engineering and can be applied in drives of various machines and mechanisms. The circuit of the invention is an increase in the durability of the elements of the mechanism by providing automatic adjustment of the belt tension depending on the transmitted load transfer. The self-tensioning pulley with a flexible link contains a hub i 1, two pressure elements 2 and 3 in a tube (L

Description

 cam clutches, two disks 4 and 5, connected with pressure elements and having conical holes 9 and 10, interacting with conical fingers 7 and 8, mounted at the ends of the rim 6, placed with the possibility of radial displacement between disks 4 and 5. Rotation from The hub 1 is transmitted by means of pressure elements.

The invention relates to mechanical engineering and can be applied in drives of various agricultural, road, construction and other machines.

The purpose of the invention is to increase the durability of the mechanism by providing automatic control of belt tension, depending on the transmitted load transfer.

Figure 1 presents the pulley, a General view; figure 2 - section aa in figure 1.

The self-tensioning flexible transmission pulley comprises a hub 1, two pressure elements 2 and 3 placed on it, two disks 4 and 5 mounted between the latter with axial movement, each of which is associated with a corresponding pressure element, and a rim 6 mounted between the disks having the possibility of displacement in the radial direction. On the outer surface of the rim 6 can be made grooves under the V-belt. The pulley is provided with circumferentially spaced tapered fingers 7 and 8 at both ends of the rim, interacting with conical holes 9 and 10, made around the circumference of each of the disks 5 and 4. The diameters of the circles that contain the tapered fingers 7 and 8 and the tapered holes 9 and 10 are equal. Each pressure element is designed as a cam clutch, one of the half couplings of which is rigidly fixed on the hub 1, and the other on the disk {4 and 5).

The self-tensioning pulley operates as follows.

93423.

2 and 3 to the disks 4 and 5, and from them through the conical fingers 7 and 8 of the rim 6. Depending on the size of the transmitted load, the displacement occurs under the action of the pressure elements 2 and 3 of the disks 4 and 5 and the eccentricity of the rim 6 changes. that the automatic change of the tension of the flexible connection, 2 Il.

The rotation from the hub 1 is transmitted by means of the pressure elements 2 and 3 to the disks 5 and 4, and from them by means of the conical fingers 7 and 8 - the rim 6.

5 Under the action of the tension force of the flexible connection, the rim 6 is located eccentrically with respect to the hub 1. As the transmitted torque increases, the pressure elements 2 and 3 move the disks 4 and 5 towards each other, causing: 5 to move in the radial direction the rim 6 due to The interaction of the conical surfaces from Versions 9 and 10 with the fingers 7 and 8. The eccentricity of the rim 6 of the pulley with respect to the hub 1 decreases, and the flexible coupling is tensioned, proportional to the value of the transmitted

Q load. When transferring the maximum load, the axis of rotation of the rim 6 and the hub 1 coincide. As the torque decreases, the tension force of the flexible connection increases, acting on

5, the rim 6, pushes the discs 4 and 5 apart, increases the eccentricity of the rim 6 As a result, the tension value of the flexible coupling decreases and is in accordance with the magnitude of the transmitted load. When the pulley is in idle mode, the eccentricity of the rim. 6 is greatest and corresponds to the mini-preload of a flexible coupling.

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Claims (1)

Invention Formula A self-coupling flexible transmission pulley containing a hub, two pressure elements placed on it, installed between the latter with the conical fingers interconnected around the rim of the rim and interacting with conical vertices in each the possibility of axial movement of two discs, each of which is associated with a corresponding pressure member, and a rim mounted between the discs, having a possibility of displacement in the radius of 5 discs, and each pressure element, which is different in that, in order to increase durability, the pulley is provided with a cam sleeve one of the coupling halves which is rigidly fixed on the hub, and the other on around the ends of the rim around the circumference of the rim with conical fingers interacting with the conical apertures formed in each of the disks, and each pressure element It is a cam clutch, one of the half couplings of which is rigidly fixed on the hub and the other on the disc W Compiled by V.Karasev. Editor L.Veselovska Tehred M.Hodanych365 / 38 Circulation 812 Subscription VNISh State Committee of the USSR for inventions and discoveries 113035, Moskvae Zh-35, Raushsk nab., d, 4/5 Production and printing company, Uzhgorod, st. Project, 4 Proofreader S. Shekmar