RU2476737C1 - Slider coupling - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: slider coupling includes two half-couplings with projections and an intermediate floating insert in the form of a parallelepiped. There are grooves on inner surface of projections of half-couplings, which are directed along longitudinal axis of the coupling. There are grooves on outer surfaces of the insert, which lie in the plane perpendicular to longitudinal axis of the coupling. Rollers are placed in the corresponding grooves of half-couplings and the insert during assembly at the points of their intersection. Surfaces of grooves are conjugated with surfaces of rollers.

EFFECT: reduction of loads on attached shafts and increasing the durability of slider coupling.

3 cl, 1 dwg

Description

The invention relates to the field of engineering, in particular to connecting devices of drives designed to transmit torque between the shafts.

Known cross coupling containing two coupling halves with protrusions connecting the shafts, and an intermediate floating liner, made in the form of a disk with mutually perpendicular grooves, the reciprocal protrusions of the coupling halves. Thus, the coupling halves mounted on the shafts are interconnected by means of a disk due to the fact that there are grooves on the ends of the disk in which corresponding protrusions of the coupling halves are placed. Since the grooves of the disk are mutually perpendicular, the coupling provides free radial movement of the connected shafts and also allows slight axial and angular movement of these shafts. In this case, the friction forces additionally load the ends of the shafts, increasing the load on the bearing bearings (Reshetov D.N. Machine details: textbook for high schools / Ed. 3rd, revised. And revised. - M .: Mashinostroenie, 1974. - P.554 )

The disadvantages of this cross coupling are the inability to reduce the loads transmitted through the connected shafts and the reduced durability due to increased loss of sliding friction and, accordingly, wear of the contacting surfaces, due to the sliding of the protrusions of the coupling halves in the grooves on the ends of the disk.

Closest to the proposed invention in technical essence and the achieved result (prototype) is a cross coupling containing two coupling halves with protrusions and an intermediate floating liner having the shape of a parallelepiped. The coupling halves have two protrusions that carry out the direction of the liner. Due to the sliding of the liner along the surface of the protrusions, the coupling compensates for some radial displacement of the ends of the connected shafts and also allows their axial and angular displacement to be negligible. In this case, the friction forces additionally load the ends of the shafts, increasing the load on the bearing bearings (Reshetov D.N. Machine details: textbook for high schools / Ed. 3rd, revised. And revised. - M .: Mashinostroenie, 1974. - P. 555 )

The main disadvantages of the described cross coupling are the impossibility of reducing the loads transmitted through the connected shafts, and low durability due to significant loss of sliding friction and wear of the contacting surfaces caused by the sliding of the liner on the surfaces of the protrusions.

The objective of the invention is to reduce the loads on the connected shafts and increase the durability of the cross coupling.

The problem is solved in that in a cross coupling containing two half-couplings with protrusions and an intermediate floating element in the form of a parallelepiped-shaped insert, according to the invention, grooves are made on the inner surfaces of the protrusions directed along the longitudinal axis of the coupling on the outer surfaces of the liner in a plane perpendicular to the longitudinal the axis of the coupling, grooves are also made, and rollers are placed in the corresponding grooves of the protrusions of the coupling halves and the outer surfaces of the liner during assembly at the intersections awn chutes is associated with the roller surface.

To increase the load capacity of the coupling, the number of gutters both on the protrusions of the coupling halves and on the outer surfaces of the liner is at least one.

To increase the range of acceptable values of the angular distortions of the shaft ends, the end surfaces of the protrusions of the coupling halves are made spherical with the centers of the spheres lying on the longitudinal axes of the coupling halves.

Reducing the loads caused by the friction forces on the connected shafts and increasing the durability of the cross coupling due to the reduction of wear of its contacting surfaces are ensured by rolling the rollers along the grooves introduced into the device during rotation transmission, which significantly reduces friction losses, since rolling friction is significantly lower than friction slip.

Figure 1 shows the design of a reversible cross coupling.

The cross coupling contains a leading coupling half 1 and a driven coupling half 2 with protrusions 3 and 4 and grooves 5, respectively. The intermediate floating liner 6, made in the form of a parallelepiped, is placed in the volume formed by the inner surfaces of the protrusions 3 and 4 of the coupling halves 1 and 2.

On the inner surfaces of the protrusions 3 and 4 of the coupling halves 1 and 2, respectively, grooves 5 are made, directed along the longitudinal axis of the coupling. On the outer surfaces of the liner 6 in a plane perpendicular to the longitudinal axis of the coupling, grooves 7 are made lying in a plane perpendicular to the longitudinal axis of the coupling.

When assembling at the intersection of the grooves 5 protrusions 3 and 4 of the coupling halves and grooves 7 of the outer surfaces of the liner 6, the rollers are placed 8. The surface of these grooves is associated with the surface of the rollers 8.

Cross coupling works as follows. The grooves 7 on the outer surfaces of the liner 6 are in contact with the rollers 8. The rollers 8 are in contact with the grooves 5 of the protrusions 3 and 4 of the coupling half 1 and 2, providing rotation transmission from the leading coupling half 1 to the driven coupling half 2. The rollers 8 rolling along the grooves 7 during the rotation of the coupling , provide radial displacement of the liner 6, compensating for the radial misalignment of the connected shafts.

Thus, the proposed invention can reduce the load on the connected shafts and increase the durability of the cross coupling.

Claims (3)

1. A cross coupling containing two coupling halves with protrusions and an intermediate floating liner in the shape of a parallelepiped, characterized in that grooves are made on the inner surfaces of the protrusions directed along the longitudinal axis of the coupling, and grooves are also made on the outer surfaces of the liner in a plane perpendicular to the longitudinal axis of the coupling and in the corresponding grooves of the protrusions of the coupling halves and the outer surfaces of the liner when assembling in the places of their intersection placed rollers, and the surface of the grooves is associated with the surface of the rollers. 2. The cross coupling according to claim 1, characterized in that the number of grooves in the protrusions of the coupling halves and on the outer surfaces of the liner is at least one. 3. The cross coupling according to claim 1, characterized in that the end surfaces of the protrusions of the coupling halves are made spherical with the centers of the spheres lying on the longitudinal axes of the coupling halves.