UA134929U - FLANGE ELASTIC COUPLING - Google Patents

Abstract

The flange elastic coupling contains two half-couplings in the form of hubs with flanges connected by bolts. The hub of one half-coupling is made of a coaxial axial hole with three or four, or six, or other number of longitudinal semicircular grooves, axisymmetrically placed on the inner cylindrical surface. In this hole is inserted a profile sleeve with a cross section, respectively, in the form of an equilateral triangle or square, or hexagon, or other rational cross-section with circular vertices extended to the outside. The outer dimensions of the circular vertices of the profile sleeve are equal to or very slightly larger than the dimensions of the longitudinal semicircular grooves. The profile sleeve has a transition sleeve with an outer shape in the form of an equilateral triangle or square, or hexagon, or other rational shape and an inner hole with a circular shape for installation on a round shaft and connecting it with dowels or slots.

Description

The useful model belongs to mechanical engineering and can be used to connect the shafts of mechanical drives of machines, at the same time to extinguish dynamic loads during the transmission of rotational moments by the shafts and to compensate for inaccuracies in their connection.

Well-known flanged couplings (see book V.O. Malashchenko Drive couplings. Designs and examples of calculations: Study guide. - Lviv: Publishing House of the National University "Lviv Polytechnic", 2006. - 196 p., fig. 2.7, p. 27 .) which contain two half-couplings, in the form of hubs with flanges, connected to each other by bolts placed in holes with a gap - one option, and placed in holes without a gap - the second option, which transmit torque due to the frictional forces that arise on the contact surface of the half-coupling in the first version and directly with bolts that are under the influence of shear deformation in the second version and serve for a rigid connection of coaxial shafts.

The main disadvantage of such couplings is that they do not compensate for inaccuracies that occur when connecting shafts and transfer the load rigidly, which negatively affects the drive parts and the machine as a whole.

The basis of the useful model is the task of reducing the influence of the clutch on inaccuracy when connecting shafts and softening the transmission of torque.

The technical result is achieved by the fact that in the hub of one of the half-couplings, a coaxial axial hole is made with three or four, or six or another number of longitudinal semicircular grooves, axisymmetrically located on the inner cylindrical surface, a profile sleeve is inserted into this hole, with a cross section, respectively, in the form of an equilateral triangle or square, or hexagon, or other rational cross-section, with circular tops extended outward, and the outer dimensions of the circular tops of the profile sleeve are equal to or very slightly larger than the dimensions of the longitudinal semicircular grooves, a transition sleeve is installed in the profile sleeve, with the outer outline of an equilateral triangle or square, or hexagon, or other rational outline and an internal hole with a circular outline for installation on a round shaft and connection to it with keys or slots.

The proposed elastic flanged coupling reduces the impact on inaccuracy when connecting shafts and softens the transmission of torque due to the deformation of the profile sleeve.

The essence of the useful model is explained by the drawings: flanged elastic coupling, general view with a longitudinal section (Fig. 1); cross-section AA, sleeve in the form of an equilateral triangle (Fig. 2); A-A cross-section, a bush in the form of a square (Fig. 3); A-A cross-section, a sleeve in the form of a hexagon (Fig. 4).

The elastic flanged coupling consists of two half-couplings 1 and 2 in the form of hubs with flanges, connected by bolts 3. In the hub, for example, half-coupling 2, a coaxial axial hole 4 is made with three or four, or six, or another number of longitudinal semicircular grooves 5, arranged axially on the inner cylindrical surface of the hole 4. A profile sleeve 6 with a cross-section, respectively, in the form of an equilateral triangle 7 or a square 8, or a hexagon 9, or another rational cross-section, with circular tops 10 extended outwards, and the outer dimensions of the circular tops, is inserted into the hole 4 10 of the profile bushing 6 are equal to or very slightly larger than the longitudinal semicircular grooves 5. In the profile bushing 6, a transition bushing 11 is installed, with an external outline of an equilateral triangle 7 or a square 8, or a hexagon 9, or another rational outline and an internal hole with a circular outline 12 for installation on a round shaft and connection to it with keys or slots.

The flexible flange coupling works like this. The torque from the semi-coupling 1 is transmitted to the semi-coupling 2 through bolts 3, and then to the profile sleeve 6 in the form of an equilateral triangle 7 or a square 8 or a hexagon 9 or another rational section. Next, the torque is transmitted through the adapter sleeve 11 to the shaft, with which it is connected by keys or slots. An increase in the torque leads to the deformation of the profile sleeve 6 due to the compression of its faces and the hollow circular tops 10 of an equilateral triangle 7 or a square 8 or a hexagon 9 or another rational section. This leads to a reduction of high impact dynamic loads. In addition, due to the deformation of the profile sleeve 6, the inaccuracies that occur when connecting the shafts are compensated.

The proposed flexible flanged coupling reduces the influence of inaccuracies when connecting shafts to the mechanism and softens the transmission of the rotational moment due to the deformation of the profile sleeve. (510)

Claims (5)

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