FR3042833A3 - COUPLING DEVICE FOR THE ROTATIONAL TRAINING OF TWO TREES WITH NON-ALIGNES BUT COMBINING AXES - Google Patents

Abstract

Coupling device for driving in rotation two shafts with non-aligned but concurrent axes. The invention relates to a device for articulating two shafts around two orthogonal axes. It consists of two shafts (1) each comprising a yoke (1 ') equipped with two pions (3) with cylindrical head (3') each housed in one of four equidistant holes drilled on the same diametral section of the sphere central (2) which binds them, so as to constitute an orthogonal hinge hinge for these two trees. The device according to the invention is particularly intended for easy repair after wear.

Description

The present invention relates to a coupling device for driving in rotation two shafts with non-aligned but concurrent axes.

In this field of mechanics the most commonly used device is the "CARDAN" seal. This type of very advantageous use joint for the transmission of high-speed high-speed torques becomes expensive for the same type of solicitations but lower in the case of accessory uses such as the maneuvering of mechanical robot elements, linkages, flight controls, etc. In addition, the repair by exchange of parts after wear, too expensive or impossible, is often not considered.

The device according to the invention overcomes these disadvantages. It comprises for this purpose the same kinematic principle of articulation of the two shafts but excludes the spider for their coupling. It is characterized in that it comprises in replacement a central sphere, pierced with four equidistant holes in the same diametrical section so as to accommodate the sliding cylindrical head of the two slugs which equip the end cap of each of the two shafts, these heads thus forming the articulation hinge of the latter around two orthogonal axes. According to a second feature dependent on the previous one, this sphere is pierced by a diametrical bore perpendicular to the plane formed by the four holes mentioned above so as to allow the introduction of the slidably fitted pins to the support of their head on the inner face of the corresponding clevis arm to which they are bound and locked by an anti-rotation washer and a nut on the outer face of the latter. According to a third characteristic dependent on the two preceding ones, the blocking in rotation of each pin is ensured by a washer comprising for this on its external contour, a flat part put in support against a shoulder of the tree provided for this purpose, of a then a hole for housing and locking the two flats below their thread on which is the clamping nut, on the other hand.

The accompanying drawings illustrate the invention:

Figures 1 and 2 show in section the device of the invention, Figure 3 an external view thereof. Figures 4, 5 and 6 show the connecting elements.

With reference to these drawings, the device consists of the following elements: • Two identical shafts (1) each comprising at one of their two ends a clevis (1 ') with a shoulder (1' ') on the outer face of each of its two arms, • A sphere (2) pierced with four equidistant holes (2 '') on the same diametrical section thereof and a diametrical bore (2 '') perpendicular to this section, • Four pieces ( 3) with a cylindrical head (3 '), a threaded end, and two flats (3' ') under the thread, • Four anti-rotation washers (4) with flat (4') and oblong hole (4 '') .

The connection of the two shafts (1) on the sphere (2) therefore consists in introducing into the bore (2 ') thereof the pins (3) which are then slid into its holes (2' ') until 'in support of their head (3') on the inner face of the corresponding screed arm. On the outer face of this same arm, the anti-rotation washer (4) is placed so that its flat part (4 ') bears against the shoulder (1' ') of the latter on the one hand and that its oblong hole (4 '') straddles the two flats (3 '') of the pin on the other hand, which is blocked axially by the nut (5).

The device according to the invention is particularly intended for easy repair after wear.

Claims (3)

1 / Device for coupling and driving in rotation of two shafts (1) non-aligned axes but concurrent characterized in that it comprises for their connection a central sphere (2) pierced in the same diameter section of four equidistant holes (2 '') for the housing and the articulation in each of the sliding cylindrical head sliding (3 ') of the two pins (3) which equip the clevis (1') at the end of the two shafts, these heads thus forming the articulation hinge of the latter around two orthogonal axes. 2 / Apparatus according to claim 1 characterized in that the sphere (2) is pierced by a diametrical bore (2 ') perpendicular to the plane formed by the four holes (2' ') so as to allow the introduction of the pins (3). ) until the support of their cylindrical head (3 ') against the inner face of the corresponding clevis arm to which they are connected and blocked by an anti-rotation washer (4) and a nut (5) on the outer face of this last. 3 / Apparatus according to the preceding claims characterized in that the locking in rotation of each pin (3) is provided by a washer (4) comprising for this on its outer contour a flat (4 ') abutted against the shoulder ( 1 '') provided for this purpose on the outer face of each clevis arm (1 ') at the end of the shaft, on the one hand, then on the other hand, an oblong hole (4' ') for housing and locking in rotation the two flats (3 '') below the thread of these pins axially clamped by the nut (5).