Multi-torque flexible coupling system
Patent Information
- Application Number
- BR102012021084
- Authority / Receiving Office
- BR · BR
- Patent Type
- Patents
- Current Assignee / Owner
- Publication Date
- 2026-09-15
Smart Images
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Abstract
Description
1 / 9 MULTI-TORQUE FLEXIBLE COUPLING SYSTEM
[001] The present invention patent refers to a coupling system composed of identical hubs for the driven and driving parts, central part and elastomer-filled pads with metal inserts (filling), wherein each hub has radial and axial movements with respect to the central part, radially displaced 90°, perpendicular to the axis of rotation.
[002] The present system can be applied to grinding mills, rolling mills, vibrating tables and all equipment that requires high radial, angular and axial elasticity, high torsional elasticity, directed towards high torques at low or high speeds. The present system allows absorbing and damping continuous torque oscillations and shocks coming mainly from the driven parts, protecting the input gears of the reducers and bearings, making them fit smoothly, minimizing abrasion and cracks, and especially absorbing large radial, angular and axial misalignments.
[003] The present system also allows a significant radial displacement of the coupled shafts relative to each other and allows tolerable radial reaction forces.
[004] There are currently three types of couplings for grinding mills and rolling mills on the market:
[005] 1) By gloves and sticks - drive system composed of two gloves and an intermediate shaft called a stick. One glove is fitted to the outlet of the Petition 870260063573, dated 06 / 26 / 2026, page 23 / 41 2 / 9 of the gearbox is connected to the mill drive input by a connecting rod. The loose couplings and the rod length allow for the necessary clearances between the hubs to absorb misalignments. It is a torsionally rigid system, not absorbing any type of torque stress, with a high wear rate for both the coupling and the shaft end, and it does not protect the gearboxes and other components.
[006] 2) By spherical joints or links - coupling system where the traction of the torque transmission is done through connecting rods or links and / or polyester straps. This system does not absorb radial misalignments and does not have torsional elasticity, a system of clearances that in the case of continuous torque oscillations the transmission is done with torque thrusts, not absorbing any torque peak, and, consequently, the torque oscillations are passed on to the reducers.
[007] 3) Torsionally rigid couplings, comprising two hubs, each equipped with an external indentation, and two sleeves equipped with an internal indentation cooperating with each external indentation, connected by a shaft. They allow small axial displacements.
[008] In addition, the movements between the hubs and the intermediate (central) part can be in three ways: by sliding (OLDHAM); through connecting rods or link elements; and by bending and compression in elastomers. Petition 870260063573, dated 06 / 26 / 2026, p. 24 / 41 3 / 9
[009] PI9711405-7 - Coupling for transmitting torque between a primary shaft and a secondary shaft refers to a device for coupling the transmission of torque between a primary shaft and a secondary shaft to enable angular and / or radial misalignment and / or longitudinal displacement between the two shafts, comprising two hubs each equipped with an external indentation normally symmetrically convex with respect to a symmetrical plane and a sleeve equipped with an internal indentation cooperating with each external indentation and capable of sliding longitudinally on them;The limiting stop devices are arranged in an annular space between a wall bearing the external indentation and part of at least one of the cubes, and comprising an annular limiting stop fixed to the cube in the symmetrical plane and, on at least one side of the limiting stop, a limiting pin associated with the limiting stop, arranged in the form of a ring of the same diameter as that of the limiting stop, perpendicular to the geometric axis of the sleeve, and fixed to it.
[0010] The MU8602898-7 - Ball bearing coupling for multi-misalignment, with central torque transmitter - allows for both axial and angular misalignment between shafts. The coupling is particularly suitable for use in high torque and low speed applications, especially where relative shaft movements are common under operating conditions due to, for example, expansions, Petition 870260063573, dated 06 / 26 / 2026, page 25 / 41 ¢ / 9 deflections or the nature of the driven machinery, or similar.
[0011] PI0500473-0 - Torque coupling device - refers to a hydraulically actuated torque coupling device for transmitting a drive torque from one input to at least one output.The torque coupling device comprises a rotating hydraulic pipe block having a plurality of cylinder bores defined therein, a rotating cam ring with multiple lobes coaxially with the pipe block, a plurality of pistons, each disposed within a corresponding bore of the plurality of cylinder bores in the pipe block to reciprocate within the same after relative rotational movement between the pipe block and the cam ring and defining a plurality of pressure chambers within corresponding cylinder bores, and a restrictor device in fluid communication with each chamber of the plurality of pressure chambers such that the restrictor device controls a discharge pressure obtainable within each chamber of the plurality of pressure chambers during discharge strokes. Each piston of the plurality of pistons rotatably engages at least one cam ring at distant ends thereof.
[0012] Unlike the object of the present patent, the patents referred to above do not exhibit radial misalignment and torsional elasticity or angle of twist. They are torsionally rigid couplings that require Petition 870260063573, dated 06 / 26 / 2026, page 26 / 41 5 / 9 lubrication systems have moving parts and do not protect the actuating and driven equipment because they are torsionally rigid, and they do not absorb shocks or vibrations.
[0013] US patent 2009 / 0186707 A1 discloses a TORSIONAL ELASTIC SHAFT COUPLING that exhibits structural and directional behavior differences, whose cavities (13, 15) are asymmetrical, having a steep flank and a shallow flank, which causes the rollers (16) to work exclusively under compression and the system to rotate in a single directional direction. In turn, the present application, however, solves the mechanical problem through an orthogonal arrangement: six pads (4) of a hub (2) are arranged in parallel, while the other six pads (4) fixed to the central part (3) of the drive hub (2) are displaced by 90°. This specific 90° displacement ensures that the elastic elements (the pads) (4) yield substantially in the radial direction, allowing extreme radial movements of up to 50mm based on the Oldham principle, but remain rigid in the peripheral direction, working efficiently under both tension and compression.
[0014] This patent offers the following advantages:.
[0015] - less wear on the shaft ends;
[0016] - longer service life of gearboxes;
[0017] - less wear on the teeth;
[0018] - reduced gearbox maintenance Petition 870260063573, dated 06 / 26 / 2026, page 27 / 41 6 / 9
[0019] - longer service life for bearings, bushings and gears;
[0020] - minimizing cracks and shaft breaks;
[0021] - Extended predictive maintenance.
[0022] The MULTI-TORQUE FLEXIBLE COUPLING SYSTEM in its preferred constructive form produces resulting bending and compression effects in elastomers, in addition to allowing displacements in all four directions, operating at low and high speeds.
[0023] The system can be understood through the attached figures and their description, in which:
[0024] Figure 1 illustrates a side view of the assembled coupling system.
[0025] Figure 2 illustrates a front view of the fastening system for the elastic elements.
[0026] Figure 3 illustrates a perspective view of the fastening flanges of the coupling's elastic elements.
[0027] Figure 4 illustrates a side view of the fastening system for the elastic elements of the coupling.
[0028] Figure 5a illustrates a side perspective view of the assembled coupling system.
[0029] Figure 5b illustrates a front view of the assembled coupling system.
[0030] Figure 6 illustrates a perspective view of one of the elastic elements, the cushion, fixed to the mounting bracket. Petition 870260063573, dated 06 / 26 / 2026, page 28 / 41 7 / 9
[0031] Figure 7 illustrates a side view of one of the elastic elements, the cushion, fixed to the mounting bracket.
[0032] Figure 8 illustrates a cross-sectional view of the coupling system.
[0033] Figure 9 illustrates radial motion - very elastic.
[0034] Figure 10 illustrates the considerably elastic torsional motion.
[0035] Figure 11 illustrates the considerably flexible axial movement.
[0036] Figure 12 illustrates the considerably flexible angular motion.
[0037] According to Figures 1 to 8, the coupling system (1) is formed by identical cubes (2) equipped with elastic elements - pads (4) arranged in parallel and connected to the central part (3), fixed through the support (5); each cube (2) has six pads (4) connected in parallel to the central part (3), fixed through supports (5), and six other pads fixed through other supports (5) that act on the central part (3) next to the actuating cube (2), also parallel, but displaced by 90°; the elastic elements (4) are positioned so as to yield in the radial, angular and axial directions of the coupling to allow a large radial movement; when fused, the elastomer and metal layers will be vulcanized together; in the peripheral direction of the coupling, the pads (4) are relatively rigid, of the multi-type Petition 870260063573, dated 06 / 26 / 2026, page 29 / 41 8 / 9 torque, because in this sense it has circumferential force—for the transmission of torque.
[0038] According to Figures 9 to 12, due to its torsional elasticity (angle of twist), the system (1) has a great capacity to absorb shocks and vibrations. The angle of twist of the coupling at the nominal torque TKn is approximately 3.7° in the standard version, and can be increased or decreased depending on the dimensions and elasticity of the pads.
[0039] The system can be scaled for any torque by changing the dimensions of the coupling structure to be larger or smaller, as well as the quantities and dimensions and elasticities of the pads (4).
[0040] Enables multi-torque coupling, i.e., for the same coupling size, different torques where, by changing the stiffness of the pad (4), the coupling torque is changed to more or less.
[0041] Requires no maintenance or lubrication.
[0042] All relative displacements are absorbed by the elastic elements (4), without any type of abrasion, therefore, without ecological damage.
[0043] Because it is free of axial forces, torque transmission always occurs in the radial direction with respect to the axes (2).
[0044] Furthermore, in system (1), rotation and torque transmission always occur in the same direction, the coupling being asymmetrical, i.e., the pads Petition 870260063573, dated 06 / 26 / 2026, pp. 30 / 41 9 / 9 elastic (4) are mounted and positioned for only one direction of rotation, aiming to save space and reduce costs. However, if the pads (4) are positioned symmetrically during assembly, the coupling rotates in both directions.
[0045] The coupling system (1) therefore has two rows of six pads (4), totaling twelve pads (4). The two rows with six pads (4) each are in the direction of the force, coupled in series. Consequently, the coupling results in significant torsional elasticity.
[0046] Axial and angular misalignments are also absorbed, with such absorption being carried out with minimal reaction forces.
[0047] The object of this patent may be dimensioned and constructed according to the required torque, rotation and misalignments, and for any type of application. Petition 870260063573, dated 06 / 26 / 2026, pp. 31 / 41
Claims
1 / 2 CLAIMS 1. MULTI-TORQUE FLEXIBLE COUPLING SYSTEM, comprising a coupling (1) formed by hubs (2), characterized in that the hubs (2) are identical and have pads (4) arranged in parallel, connected to a central part (3) and fixed by means of the support (5); wherein each hub (2) has six pads (4) in parallel connected to the central part (3), fixed by means of the support (5) that act on the central part (3) next to the actuating hub (2), also parallel, but displaced by 90°; the pads (4) are positioned so as to yield in the radial, angular and axial direction of the coupling (1) to allow radial movement; the pads (4), when fitted, comprise layers of elastomer and metal vulcanized together; and, in the peripheral direction of the coupling (1), the pads (4) are rigid, presenting circumferential force for the transmission of torque.
2. MULTI-TORQUE FLEXIBLE COUPLING SYSTEM, according to claim 1, characterized by comprising a torsion angle which, due to its torsional elasticity, absorbs shocks and vibrations; the torsion angle of the coupling at the nominal torque TKn is 3.7° in the standard version, and, depending on the dimensions of the pads (4), may be increased or decreased; the system (1) may be dimensioned for any torque by changing the dimensions of the coupling structure to more or less, as well as the quantities and dimensions of the pads (4); for the same coupling size, it allows different torques in which, by changing the stiffness of the pad (4), the torque of the coupling is changed to more or less; the relative displacements are absorbed by the pads (4), without any type of abrasion; free from axial forces, torque transmission always occurs in the radial direction with respect to the axes (2).
3. MULTI-TORQUE FLEXIBLE COUPLING SYSTEM, according to any of the preceding claims, characterized by a system (1) whose rotation and torque transmission are always in the same direction, the coupling being asymmetrical in which the elastic pads (4) are mounted and positioned only for one direction of rotation; when the mounting of the pads (4) is in a symmetrical position, the rotation of the coupling becomes in both directions; the coupling system (1) has two rows of six pads (4), totaling twelve pads (4); the two rows with six pads (4) each are in the line of the direction of the force, coupled in series; consequently, the coupling results in torsional elasticity. Petition 870260063573, dated 06 / 26 / 2026, page 13 / 41