SU1742542A1 - Shaft-to-bush joint for transmission of torque - Google Patents

Abstract

Use: in the field of engineering for connecting torque transmitting parts. The invention: on the shaft there are mainly three flats, and on the ends of the sleeve in the tangential grooves there are mainly six prismatic keys, which are in contact with the flats of the shaft in one plane. From axial displacement, the keys are held by caps fastened with screws to the ends of the sleeve. This constructive implementation allows to reduce the labor intensity of manufacturing while simplifying the processes of assembly and repair of the joint. 3 hp f-ly. 2 Il.

Description

The invention relates to mechanical engineering and can be used to transmit torque.

A keyed joint is known in which the coupling of the shaft with the sleeve is carried out by means of three evenly spaced dowels installed in the slots of the sleeve and with their flat surfaces supported on the shaft bristles.

This compound is non-technological, both in terms of manufacturing and in terms of assembly and repair processes.

The purpose of the invention is to increase reliability by reducing the loosening of the sleeve when making keyways and reducing the labor intensity of manufacturing while simplifying the assembly and repair processes of the joint.

FIG. 1 shows the connection, the general view (the screws holding the cover, and the threaded holes for them are not shown); FIG. 2 is a section A-A in FIG. one.

The connection consists of shaft 1 with flats 2, bushings 3 with tangential grooves under

prismatic keys 4, cover 5 and stop 6.

The shaft 1 of circular section in the movement area along its sleeve 3 is made with at least one bald patch 2, and the optimal number of bald spots 2 is three - evenly around the circumference, and two pins 4 can contact the bald patch 2, one at each end of sleeve 3. With three coats 1, the number of keys 4 reaches six. The bushing 3 with the central bore is mated with the outer surface of the shaft 1 along a sliding fit (with a small clearance). Preferably, both ends of the sleeve 3 have blind grooves of rectangular cross section, the inner walls of the grooves being separated from the center of the shaft 1 by the same distance as the flats 2 of the shaft 1. The peripheral walls of these grooves usually extend over a distance greater than the radius shaft 1. The depth, height and length of the grooves correspond to the dimensions of the keys 4, which fit into the grooves with a small gap, and their sides are in contact with the bottom of the grooves and flat ring covers 5 attached to the sleeve with 3 screws

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(not shown) - at least three screws evenly around the circumference. The faces of the bald spots 2 and the surfaces of the keys 4 that are in contact with them are usually hardened and ground. To limit the movement of the sleeve along the shaft 1 (or vice versa), an end is made at the end of the shaft 1, for example, in the form of a locking ring 6.

The connection works as follows.

Sleeve 3 through the tabs 4 is in contact with the flips 2 of shaft 1 and is mounted on it along a sliding fit. This ensures the mobility of the sleeve 3 along the shaft 1 (or vice versa), as well as the ability to transmit torque, i.e. The proposed connection works similarly to known key joints. At the same time, the joint provides better maintainability compared to the spline one, since as the grooves and the keys 4 have peripheral walls, flat thin gaskets can be installed and they are pressed onto the lids 5. The overhaul of the joint is also simple: you need to polish the flat faces 2 of the shaft 1 and make new tabs 4.

The use of the invention allows to reduce the labor intensity for the manufacture and repair of the joint. The joint can be made on universal metal-cutting equipment.

Claims (4)

Claims 1. Shaft sleeve type coupling for transmitting torque, comprising a section of a shaft of circular cross section mounted on it with the possibility of an axial perforation five 0 five 0 five The sleeve and the means of communication of these elements in the circumferential direction are uniformly made on the shaft evenly around the circumference and placed in the slots made in the sleeve evenly around the circumference of the keys, in contact with their flat surfaces, the sleeve is provided with means for fixing the keys in the slots axial movement, characterized in that, in order to increase reliability by reducing the loosening of the sleeve when making keyways, reducing the labor intensity of manufacture while simplifying the assembly processes and repair of the joint, keyways are located tangentially on the side of at least one end of the sleeve and are blind, end surfaces of the grooves are radial, keys are prismatic with means for reducing stress concentration on the end surfaces, and the length of keys is the length of the key grooves. 2. Connection pop. 1, characterized by That means of reducing the stress concentration on the end surfaces of the dowels x are made in the form of rounded sections with a radius of curvature corresponding to the radius of the response surfaces of the key grooves. 3. Compound according to Claim 1, characterized in that the means for reducing the stress concentration on the end surfaces of the keys are chamfered. 4. The connection according to claim 1, characterized in that the key grooves with the keys arranged in them are made on both ends of the sleeve. Aa A L / Rig 2.