DE102007057046A1 - Sealing structure arrangement for connection, particularly bellows arrangement for shaft joint, has sealing structure, particularly bellows which are positioned on shafts through interconnection of bearing - Google Patents

Abstract

The sealing structure arrangement has a sealing structure, particularly bellows (1) which are positioned on shafts (2,3) through interconnection of a bearing (5). The bearing enables a rotary motion of the respective shafts against the sealing structure. The shafts are arranged angular to each other. The shaft joint (4) transmits a rotary motion between the shafts.

Description

The The invention relates to an arrangement of a sealing structure for a Rotary movement between shafts, which are arranged angularly to each other can, transferring Connection, in particular a bellows arrangement for a corresponding Wave joint.

generally known mechanically moving parts are lubricated to reduce friction losses and to minimize mechanical wear. To this lubrication from external influences, such as Dirt or water, protect, is the range of motion usually across from the environment sealed by a so-called sealing structure here. In the case of cardan shafts, this sealing structure is customary formed by a so-called. Bellows, the shaft joint, which a rotational movement of a first shaft on a second shaft transmitting Connection represents, envelops. Usually The bellows is end-to-end with the driving and with the abortive Shaft firmly connected, thereby forming a closed space around the shaft joint, with the bellows at speed of the said Waves are rotating.

If the interconnected shafts are at an angle to each other, d. H. do not describe a common line and thus an angular offset is present, it is with a rotational movement of the waves attached thereto Bellows or generally a shaft joint enclosing sealing structure continuously deformed. In the case of a bellows, this deformation absorbed by the folds of the bellows, so that during one complete revolution the bellows at a point once maximally compressed and once maximally pulled apart.

There the bellows, or generally a sealing structure enveloping the shaft joint or shaft connection at higher Speeds and / or greater angular misalignment is very heavily used and thus can take damage, should hereby a remedy for this Problems are shown (= object of the present invention).

The solution this task is for an arrangement of a sealing structure for a rotational movement between Waves that can be arranged at an angle to each other, transmitting Compound, in particular for a bellows arrangement for a corresponding shaft joint, characterized in that the Sealing structure, in particular the bellows, on each of the shafts with the interposition of a rotational movement of the respective shaft across from permitting the sealing structure Warehouse is stored. Preferably, the sealing structure is spatially fixed and the bearing may be a sealed ball bearing.

According to the invention is thus proposed, the movement of the bellows through preferably sealed Bearings, preferably ball bearings, from the rotary motion of the shafts to decouple, so that the Faltenalg only the said angular displacement balance and can stand still, so that at or despite a rotational movement of the waves no continuous deformation of the Bellows (or the seal structure) takes place.

This can also be explained with reference to the accompanying schematic diagram in which the reference numeral 2 a first wave and the reference numeral 3 a second shaft is marked, which has a shaft joint 4 are connected to each other in such a way that, in spite of an apparent as angular position of the two waves 2 . 3 to each other a rotational movement of a shaft can be transmitted to the other shaft.

To this shaft joint 4 As well as a lubrication of the same to protect against external influences, this is of a (usual) bellows 1 wrapped, with its two ends each with the interposition of a rotational movement of the respective shaft 2 respectively. 3 opposite the bellows 1 enabling warehouse 5 on the waves 2 . 3 stored or supported. About these camps 5 , which are preferably sealed to the outside ball bearings, is the bellows 1 from the rotary motion of the waves 2 . 3 decoupled. Preferably, the bellows 1 in a suitable place 6 spatially fixed, ie connected to the environment, not to the waves 2 . 3 by the friction in the bearings 5 to be put into a rotary motion.

If, however, the bellows 1 with both ends firmly with the two waves 2 . 3 connected, the bellows would rotate with a rotation of these waves and would therefore alternately compressed and relaxed. This burden is avoided by the arrangement described, wherein it should be noted that quite a variety of details may be deviated from the above explanations, without departing from the content of the claims. In particular, any deformable or expandable sealing structure between rotatable parts, which may be offset from one another, can be generally decoupled from the rotational movement of these parts, using the proposed principle, namely, mounting via a rotary movement of the respective part relative to the sealing structure enabling bearings on the respective parts , Due to the decoupling of rotational movement and offset is significantly reduces the stress on the deformable seal structures.

Claims (3)

Arrangement of a sealing structure ( 1 ) for a rotational movement between shafts ( 2 . 3 ), which can be arranged at an angle to each other, transmitting connection, in particular bellows arrangement for a corresponding shaft joint ( 4 ), wherein the sealing structure, in particular the bellows ( 1 ), on each of the waves ( 2 . 3 ) with the interposition of a rotational movement of the respective shaft ( 2 . 3 ) relative to the sealing structure ( 1 ) enabling warehouse ( 5 ) is stored. Arrangement according to claim 1, characterized in that the sealing structure ( 1 ) is spatially fixed. Arrangement according to claim 1 or 2, characterized in that the bearing ( 5 ) is a sealed ball bearing.