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1. (WO2018222682) BEARING UNIT FOR A TURBOCHARGER ROTOR
ملاحظة: نص مبني على عمليات التَعرف الضوئي على الحروف. الرجاء إستخدام صيغ PDF لقيمتها القانونية

Claims

A bearing unit (10) for a turbocharger rotor (200) comprising

a bearing housing (100); and

a bearing bush (300) which is arranged in a central hole (110) for radial bearing of a turbocharger rotor (200) in the bearing housing (100);

characterized by elastic anti-rotation means (400), wherein the anti- rotation means (400) are arranged radially between the bearing bush (300) and the bearing housing (100) and are designed to prevent a rotation of the bearing bush (300) relative to the bearing housing (100).

The bearing unit according to Claim 1, characterized in that the anti- rotation means (400) do not limit an axial movement of the bearing bush (300) relative to the bearing housing (100) in at least one direction.

The bearing unit according to Claim 1 or Claim 2, characterized in that a frictional engagement is formed between the anti-rotation means (400) and the bearing housing (100) to prevent a rotation of the bearing bush (300) relative to the bearing housing (100); and/or

that a positive-locking connection is formed between the anti-rotation means (400) and the bearing housing (100) to prevent a rotation of the bearing bush (300) relative to the bearing housing (100).

The bearing unit according to any one of the preceding claims, characterized in that the elastic anti-rotation means (400) are configured as an annular, spring-elastic clamp.

5. The bearing unit according to Claim 4, characterized in that the clamp has a non-closed annular shape.

6. The bearing unit according to Claim 4 or Claim 5, characterized in that an outer diameter (dl) of the anti-rotation means (400) in at least the

unloaded state of the anti-rotation means (400) is greater than or equal to an inner diameter (d2) of the central hole (110), at least in one area of the central hole (110) in which the anti-rotation means (400) are arranged.

The bearing unit according to any one of Claims 4 through 6, characterized in that the clamp has at least one protrusion (450) facing radially outward, wherein the protrusion (450) engages in a recess (130) in the central hole (110) of the bearing housing to provide a positive-locking connection between the anti-rotation means (400) and the bearing housing (100) to prevent a rotation of the bearing bush (300) relative to the bearing housing (100).

The bearing unit according to any one of the preceding claims, characterized in that an inner periphery of the anti-rotation means (400) and an outer periphery of the bearing bush (300), located opposite the inner periphery of the bearing bush, have geometric shapes adapted to one another which prevent a rotation of the bearing bush (300) relative to the anti-rotation means (400).

The bearing unit according to any one of the preceding claims, characterized in that an outer periphery of the anti-rotation means (400) is configured as circular, polygonal, or as circular with lateral flattened areas (430) or concave indentations (460).

The bearing unit according to any one of the preceding claims, characterized in that the inner periphery of the anti-rotation means (400) is configured as circular or polygonal, wherein straight sections (440) extending parallel to one another or convex projections (470) are provided on opposite lateral areas of the anti-rotation means (400).

The bearing unit according to any one of the preceding claims, characterized in that the bearing bush (300) has an accommodation area (310) for the anti-rotation means (400), in particular wherein the

accommodation area (310) is a groove extending on an outer periphery of the bearing bush (300).

The bearing unit according to Claim 11, if Claim 11 is dependent on Claim 10, characterized in that the accommodation area (310) has flattened areas (320) extending parallel to one another or concave indentations (330) on opposite peripheral areas, wherein the flattened areas (320) or the concave indentations (330) interact with the straight sections (440) or the convex projections (470) of the anti -rotation means (400) to prevent a rotation of the bearing bush (300) relative to the anti -rotation means (400).

The bearing unit according to any one of the preceding claims, characterized in that the bearing housing (100) has at least one radial hole (120) in the area of the anti -rotation means (400) for accommodating a locking pin (600), wherein the locking pin (600) engages through the hole (120) into a projection (480) of the anti -rotation means (400) facing radially inward to form a positive-locking connection between the bearing housing (100) and the anti-rotation means (400).

A charging device for an internal combustion engine, comprising a compressor with a compressor housing and a compressor wheel arranged therein; and

a bearing unit (10) according to any one of the preceding claims.

15. The charging device according to Claim 14, characterized in that the charging device is an exhaust gas turbocharger, and additionally comprises a turbine with a turbine housing and a turbine wheel arranged therein.