RU2176342C2 - Universal joint coupling - Google Patents

Abstract

FIELD: transport engineering. SUBSTANCE: invention relates to devices for connecting misaligned shafts changing their relative position in operation. Proposed device has forks installed on shafts to be connected, crosses and bearings. Forks installed on shafts are made in form of bushings with trunnions over periphery. At least one of forks is installed on shaft through splined bushing to provide axial displacement. Crosses are made in form of rings with trunnions over periphery and holes in which forks are fitted on bearings. Trunnions of crosses are connected by means of bearings with coupling members fastened to each other. Crosses and coupling members are provided with side recesses at holes. EFFECT: increased efficiency of compensation for radial, axial and angular displacement of connected shafts. 3 dwg

Description

 The invention relates to the field of engineering, and in particular to devices for connecting misaligned shafts of the engine and mechanism, which have a change in relative position during operation. For example, the connection of an electric motor with a gearbox in the drive of electric train cars.

 Known dual coupling for connecting shafts containing traditional forks and crosses and connecting elements [1]. The disadvantages of this design are the inability to create a compact design for connecting the shafts with axial compensation of the position of the shafts.

 Known double cardan joint [2], which also contains traditional forks, crosses and connecting elements. The disadvantages of this design are similar to the above and, in addition, the impossibility of quick installation and dismantling in the drives of cars.

 Known driveshaft with high torsional flexibility [3]. However, the use of such a design solution in the coupling is almost impossible.

 The closest to the proposed solution in technical essence, and the achieved result is a homokinetic double hinge [4], containing forks, crosses and an internal double fork and providing the possibility of quick and easy installation and disassembly. The disadvantage of this hinge is the high complexity and the impossibility of implementation in limited dimensions for transmitting moments up to 2500 Nm when compensating axial displacements of the shafts.

 The aim of the invention is to simplify the design of the universal joint with compensation for radial, axial, angular fluctuations in the position of the connected shafts. This goal is achieved in that the forks mounted on the connected shafts are made in the form of bushings with trunnions on the periphery, two crosses made in the form of rings with trunnions on the periphery and holes in which the forks are mounted by bearings, and the trunnion trunnions are connected by bearings with half-couplings fastened together, while at least one of the forks is mounted on the shaft through a spline sleeve with the possibility of axial movement.

 Compared with the prototype, the specified set of features is new, that is, the claimed technical solution meets the criterion of "novelty." No known technical solutions have been found in known sources of information.

 The above allows us to conclude that the claimed technical solution meets the criterion of "inventive step".

 The essence of the solution is illustrated by drawings: in FIG. 1 shows a general view of the cardan coupling, in FIG. 2 is a view along A, in FIG. 3 is a section along BB. The cardan coupling includes forks 1 and 2, which are bushings with trunnions on the periphery that are mounted on the connected shafts 3 and 4, and the plug 2 is mounted on the shaft through a splined sleeve 6. The forks 1 and 2 with trunnions are installed in the holes of the crosspieces 7 and 8 by bearings which are made in the form of rings with trunnions on the periphery and holes. On the trunnion trunnions by means of bearings, half-couplings 9 and 10 are mounted, which are essentially forks, interconnected by end cams 11 and fastened by bolts 12. Bearings are fixed by covers 13. To ensure assembly of the cross-pieces 7, 8 and half-couplings 9, 10 through the holes for bearings 14 equipped with recesses 15. Cardan coupling operates as follows. Each coupling assembly is a Hook joint. Two Hooke hinges transmit rotation from shaft 3 to shaft 4 almost synchronously and in the spline connection of one of the forks with the shaft provide compensation for the radial, axial and angular relative displacements of the connected shafts.

Sources of information
1. O.A. Ryakhovsky, S. S. Ivanov "Coupling Handbook". -L .: "Polytechnic", 1991, 370 p., P. 59.

 2. USSR patent N 1539413, M. cl. F 16 D 3/30 from 1/30/90, Bull. N 4.

 3. O.A. Ryakhovsky, S. S. Ivanov "Coupling Handbook". - L .: "Polytechnic", 1991, 370 p., P. 65.

 4. USSR patent N 1595351, M. cl. F 16 D 3/40 from 09/23/90, Bull. N 35.

Claims (2)

 1. A cardan coupling containing forks mounted on the connected shafts, crosses, bearings, characterized in that the forks mounted on the connected shafts are made in the form of bushings with pins on the periphery, with at least one of the forks mounted on the shaft through a spline sleeve with the possibility of axial movement, two crosses are made in the form of rings with trunnions on the periphery and holes in which forks are mounted by bearings, and trunnion trunnions are connected by means of bearings with coupling halves fastened between wallpaper.  2. The cardan coupling according to claim 1, characterized in that the crosses and coupling halves are provided with side recesses through the holes.

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