DE102006033555A1 - Roller bearing with associated oil filter for e.g. automotive applications, agricultural machinery, marine diesel engines - Google Patents

Abstract

Claimed is an oil filter for use in association with e.g. automotive roller bearings. The roller bearing has an outer ring (1) separated by rollers (4) from an inner ring (3). The bearing is lubricated by oil within a closed loop of which it forms a part. The bearing oil feed pipe (5) has a particle filter immediately prior to the bearing inlet.

Description

The The invention relates to a bearing consisting of one on an axis arranged inner ring that over Rolling elements one outer ring wearing, wherein in the rolling elements receiving Space between the inner ring and the outer ring lubricating oil is supplied, the above an oil supply line an oil circuit a machine in which the bearing is installed, is removed.

overlays with rolling elements (for Example ball bearings, roller bearings) require good lubrication for one long lifetime. Not only suitable lubricating oils are to be used but also on the maintenance of oil change intervals and minimum purities of the lubricating oil to pay attention. Impurities can to increased Wear, larger particles lead to a very rapid failure of the bearing.

Around Guaranteeing the achievement of a long service life becomes common required, impurities and attrition on particle sizes of smaller than 15 μm to limit.

built up Bearings that do not have autarkic lubrication, but to the oil circuit connected to a corresponding machine, a device or a gearbox are particularly endangered by so-called primeval dirt.

The Machines, devices or gearbox usually have an integrated oil filter in the lubricating oil circuit. This protects but not before particles in the feeds of the lubricating oil to the bearing already at commissioning of the machine, the device or the gearbox were; be it by insufficient cleaning or by loosening while of the operation.

From the EP 1 348 879 A1 is a bearing consisting of an inner ring arranged on an axle, which carries an outer ring via rolling elements, wherein in the rolling body receiving space between the inner ring and the outer ring lubricating oil is supplied via an oil supply to an oil circuit of a machine in which the bearing is installed, is taken, known. This bearing is installed in a transmission for a vehicle and specially adapted to this use. Specifically, in this camp two inner rings are present, which are axially spaced from each other by a spacer ring. Through channels through the spacer ring lubricating oil is conveyed to the rolling elements. The channels are oil supply lines in the axis on which the bearing is arranged, connected.

Of the Invention is based on the object, a generic bearing to improve so that in the lubricating oil entrained impurities and existing Abrasion with particles of a harmful size, not to the Get rolling bodies.

According to the invention this Task solved by that at least one filter for the lubricating oil in the warehouse itself or in the oil supply line directly is arranged in front of the warehouse. This will close the oil just before it is fed filtered the rolling elements. Particles with a harmful size can thus from the oil be separated.

In an embodiment of the invention the oil supply line integrated into the axle and the filter is a sieve filter. By the mesh size of the filter can adjust the filter fineness become. The size of the filter depends on the expected amount of dirt. In engines with one Main oil filter essentially drops only the original dirt. Therefore, the filter can be made relatively small be.

In In another embodiment, the bearing has two inner rings, wherein the two inner rings by a spacer axially from each other are spaced. The oil supply line ends in the spacer ring and the spacer ring consists of a filter forming filter material through which the oil is passed to the rolling elements. By This configuration requires no additional parts and thus the effort and costs are minimized.

Prefers If the spacer is made of a porous or porous material, for example sintered material. This spacer ring with its pores filters the lubricating oil. Due to the pore size can be set the filter fineness. A sufficient filter surface is by the size of the spacer ring and the cross section of the directly connected oil supply line set.

One needs larger quantities of oil, for example for intensive cooling bearings, it is possible to divide filtering.

In an inventive embodiment of the invention is in the oil supply arranged in the axis of a pre-filter and a fine filter in the camp.

Of the Prefilter in the axle can be a coarse mesh screen filter and the fine filter already described porous spacer ring or a sintered ring. Of the Sinterring takes over then the function of fine filtering. This division has the advantage that on the one hand small filters can be installed, but these are not worth mentioning increase the flow resistance cause and do not clog.

For small amounts of oil, the filter can in a be arranged radial bore of the axis.

In Further embodiment of the invention, the bearing has two outer rings on, with the two outer rings axially spaced apart by a spacer ring. The oil supply line ends in the spacer ring and the spacer ring consists of a Filter forming filter material through which the oil is passed to the rolling elements. This embodiment is normally used to support a rotating shaft. According to the invention Distance ring to the oil supply line connected and is at the same time as a filter, for example as Sinterring formed.

Of the Sinterring then sits between the outer races of the two Tapered roller bearings.

The inventive bearing may be a ball bearing or a roller bearing. Basically, that is Subject of the present invention also in a plain bearing applicable, in particular for bearings where no direct Bearing material such as bearing bronzes or plastics for Application come. For example, bearing pairings react steel / steel or steel / cast iron very sensitive to dirt and prone to Eat.

In In accordance with an embodiment of the invention, the engine is an internal combustion engine, preferably a self-igniting Internal combustion engine.

In Another embodiment is the bearing in the gear drive of the internal combustion engine arranged and the oil circuit is the lubricating oil circuit the internal combustion engine.

Further advantageous embodiments of the invention are the description of the figures to take in the embodiments closer to the invention are described.

1 shows a section of a self-igniting internal combustion engine 9 ,

In the wheel drive 10 this internal combustion engine 9 is an idler 11 stored with two pairs of tapered roller bearings. The bearings sit on an axle 2 , in turn, on the crankcase 12 via a fastening screw 13 is attached. The intermediate wheel 11 is provided on its outer peripheral surface with a toothing, which on the one hand with a drive wheel 14 , here the camshaft, and on the other hand with a driven wheel 15 engaged.

The tapered roller bearings have two inner rings 3 on, between which a spacer ring 7 is arranged, the a defined distance between the two inner rings 3 established.

Between these inner rings 3 and the two outer rings 1 are rolling elements 4 , The rolling elements 4 have the shape of a truncated cone and are also against the axis 2 mirror-symmetrically inclined.

For cooling and lubrication of the rolling elements 4 is via an oil supply line 5 under a predetermined pressure lubricating oil through a cavity in the axis 2 directed. In the cavity is a sieve filter 6 arranged as a pre-filter, through which the conveyed lubricating oil is pressed through.

The cavity of the axle 2 is over a radial bore 8th with an outer annular groove 16 in the axis 2 connected. This ring groove 16 adjoins the spacer ring 7 ,

The spacer ring 7 is designed as a fine filter and consists of a porous filter material or a sintered material.

According to a specification only the sieve filter can be used 6 or the porous spacer ring 7 to be built in.

2 shows such a variant, in which in the cavity in the axis 2 no filter is placed and only the spacer ring 7 is designed as a filter.

3 shows a further variant, in which in the cavity in the axis 2 a sieve filter 6 is arranged and the spacer ring 7 has no filter function. There are one or more radial holes in it 17 arranged, over which the oil to the rolling bodies 4 arrives.

4 shows a filtering with small amounts of oil. Here is in a radial hole 8th a filter 18 arranged.

1

outer ring

2

axis

3

inner ring

4

rolling elements

5

oil supply

6

strainer

7

spacer

8th

drilling

9

Internal combustion engine

10

gear drive

11

idler

12

crankcase

13

fixing screw

14

drive wheel

15

output gear

16

ring groove

17

radial Bore in the spacer ring

18

filter

Claims (13)

Bearing, consisting of one on an axis ( 2 ) arranged inner ring ( 3 ), which via rolling elements ( 4 ) an outer ring ( 1 ), in which the rolling elements ( 4 ) receiving space between the inner ring ( 3 ) and the outer ring ( 1 ) Lubricating oil is supplied via an oil feed line ( 5 ) is taken from an oil circuit of a machine in which the bearing is installed, characterized in that at least one filter for the lubricating oil in the bearing itself or in the oil supply ( 5 ) is arranged immediately in front of the camp. Bearing according to claim 1, characterized in that the oil supply line ( 5 ) into the axis ( 2 ) and that the filter is a sieve filter ( 6 ). Bearing according to claim 1 or 2, characterized in that the bearing has two inner rings ( 3 ), wherein the two inner rings ( 3 ) by a spacer ring ( 7 ) are axially spaced from each other, that the oil supply ( 5 ) via a bore ( 8th ) and an annular groove ( 16 ) in the spacer ring ( 7 ) and that the spacer ring ( 7 ) consists of a filter material forming the filter, through which the oil to the rolling elements ( 4 ). Bearing according to claim 3, characterized in that the filter material is a porous one or porous material, preferably a sintered material. Bearing according to one of claims 1 to 4, characterized in that in the oil supply ( 5 ) in the axis ( 2 ) are arranged a pre-filter and a fine filter in the camp. Bearing according to claim 5, characterized in that the fine filter in the spacer ring ( 7 ) is integrated. Bearing according to one of claims 1 to 6, characterized in that the filter in a radial bore ( 8th ) of the axis ( 2 ) is arranged. Bearing according to one of claims 1 to 7, characterized in that the bearing two outer rings ( 1 ), wherein the two outer rings ( 1 ) by a spacer ring ( 7 ) are axially spaced from each other, that the oil supply ( 5 ) in the spacer ring ( 7 ) and that the spacer ring ( 7 ) consists of a filter material forming the filter, through which the oil to the rolling elements ( 4 ). Bearing according to one of claims 1 to 8, characterized that the bearing is a ball bearing or a roller bearing. Bearing according to one of claims 1 to 9, characterized that the engine is an internal combustion engine, preferably a self-igniting internal combustion engine is. Bearing according to claim 10, characterized in that the bearing in the wheel drive ( 10 ) of the internal combustion engine is arranged and the oil circuit of the lubricating oil circuit of the internal combustion engine. Bearing according to one of claims 1 to 7, characterized in that the two outer rings ( 1 ) are integrally formed. Bearing according to one of claims 1 to 7, characterized in that the two outer rings ( 1 ) and intermediate wheel ( 11 ) are integrally formed.