| DE1261704B | 1968-02-22 | |||
| FR2155640A5 | 1973-05-18 | |||
| DE3533759A1 | 1986-04-30 | |||
| US1924562A | 1933-08-29 | |||
| US4239303A | 1980-12-16 | |||
| DE742727C | 1943-12-10 | |||
| US3965880A | 1976-06-29 | |||
| US3375563A | 1968-04-02 | |||
| GB2127107A | 1984-04-04 |
| 1. | Λ . A slide bearing for crank shafts (4) of internal combustion engines, in particular, engines of automotive vehicles, characterized in that provided in the area of t radial slide face (2) is a dualconical formation (3). |
| 2. | A slide bearing according to claim Λ , characterized in that the dualconical bearing layer (3) is applied to a steel beam (5) which, in its turn, is held, by means of a lateral flange (6), on the engine block (7) and on the bearing cap of the engine for taking up the axial forces. SUBSTITUTE SHEET Title: Radial/Axial Slide Bearing for Crank Shafts of Internal Combustion Engines SUMMARY The invention provides a slide bearing for crank shafts of internal combustion engines, in particular, engines of automotive vehicles. To achieve a defined lubricating film between slide bearing and crank shaft at manufacturing costs reduced compared to the stateofart bearings, and to attain a precise axial guidance of the crank sha t, a dualconical formation is provided in the area of the radial slide face. Advantageously, the dualconical bearing layer is applied to a steel beam which, in its turn, for taking up the axial forces, is held by means of lateral flanges, on the engine block and on the bearing cap of the engine. SUBSTITUTE SHEET. |
The present invention is concerned with a radial/ axial slide bearing for crank shafts of internal combustion engines.
Hitherto, flange-type bearings have been used with crank shafts for taking up the axial forces, wherein the frictior. conditions prevailing on the flanges have been undefinable. Mixed friction, at best, is achieved. Owing to the design, no dynamic lubricating film can develop. A precise axial guidance of the crank shaft only conditionally is attainable. In the past, tests were carried out with form- locking connections between the flanges and the bearing shell, yielding no satisfactory results.
It is, therefore, the object of the invenτio to provide a slide bearing for crank shafts that avoids the afore- described disadvantages and is characterized by a defined lubricating pattern, low manufacturing costs and a precise axial guidance of the crank shaft.
This problem, in the practice of the invention, is substantially solved in that the slide bearing, in the area of the radial slide ace, is provided with a dual-conical ormation.
SUBSTITUTE SHEET
The afore-mentioned dual-conical configuration cf the slide face enables radial forces as well as axial forces tc be taken up. The slide bearing according to the invention provides for defined lubricating film conditions. Ihe required adjustment of the crank shaft to the dual-conical formation of the slide bearing is readily attainable, for example, by rotary broaching or grinding measures. In the event that, as an alternative to a flange-type bearing, starting discs are provided, the same can be eliminated by employing the slide bearing of the invention.
According to a peferred form of embodiment cf the invention, the dual-conical bearing layer is applied tc a steel beam which, in its turn, for taking up the axial forces is held, by means of lateral flanges, en the engine block and on the bearing cap of the engine.
Further objects, advantages, features and fields cf end-use application of the present invention will become manifest from the following description of one form cf embodiment with reference to the drawing, wherein all described and/cr graphically shown features, by themselves or in any desired reasonable combination, form the subject matter of the present invention, irrespective of the composition thereof in the claims or the dependence thereof.
According to the depict, the radial/axial slide bearing for the crank shaft of an engine, in the area cf the slide face 2, is provided with a dual-conical formation 3 which can be achieved, for example, by a corresponding drilling operation. The dual-conical bearing layer J is cast onto a steel bean 5 which is supported by lateral flanges 5 on engine block 7 . thereby deflecting the axial forces as developed ont the engine block "* . In addition t;
SUB STITU TESHEET
a defined lubricating film, a precise axial guidance of the crank shaft will be achieved thereby.
Concerning the bearing material, the use of any customary and commercially available substances can be employed.
SUBSTITUTE SHEET