FR2561331A1 - BEARING BEARING WITH DOUBLE ROW ROLLS - Google Patents

Abstract

BEARING, ESPECIALLY FOR THE EXCITATION SHAFT OF VIBRATING DRUM CRUSHERS OR OTHER SIMILAR MACHINES, WITH A DOUBLE ROW OF ROLLER BEARING, OR ONE OF THE BEARING RINGS IS MADE IN ONE PIECE WITHOUT SHOULDERS AND OR THE OTHER RING OF THE BEARING CONSISTS OF TWO SEPARATE RINGS WITH SHOULDERS. THE TWO INTERNAL RINGS 5 EQUIPPED WITH SHOULDERS 9, ON THE UPPER FACES 13 ON WHICH THE CAGES 12 REST WITH LOW CLEARANCE, ARE SPACED FROM ONE OF THE OTHER IN THE AXIAL DIRECTION BY A COLLAR 11 OF THE SHAFT OR OTHER SIMILAR ELEMENT.

Description

- 1 - Company called: SKF GMBH Invention of Heribert RUSEOH Priority of a

  utility model application filed in R.F.A. on March 13, 1984 under No. G 84 07 600.3 Rolling bearing with double row of rollers

  The invention relates to a bearing, particularly for the exciter shaft.

  vibratory drum mills or other similar machines with a double-row roller bearing, where one of

  The bearing is made of one piece without shoulders and the other one

  the bearing consists of two separate rings with

  Elements e. Rolling bearing with double row of rollers of the type presented

  above is known for example from patent application DE-16 05 119.

  On this rolling bearing known, the two bearing rings provided with shoulders are installed contiguously next to each other in the bore of a housing. The bearing rings are fixed in the axial direction by a cover of the housing and by screws. It often happens that the assembly of such a bearing is delicate: thus, when the outer ring is subjected to a circumferential load, it requires a tight fit in the housing, and that the latter can not be heated because its mass is too important. As to perform during assembly a cooling of the entire bearing or the outer ring with the sets of rollers it contains, this is a complicated operation and includes in

in addition to the risks of corrosion.

  The present invention aims to provide a rolling bearing

  Double row of rollers of the type presented in the introduction which can be assembled without problems and which ensures a distribution

optimal loads.

  This object is achieved by the invention by means of a bearing characterized in that the two inner rings provided with shoulders on the upper faces of which rest with a small clearance the cages, are arranged spaced from each other in the axial direction by 2 -

  a collar of the tree or other similar element.

  According to a further characteristic of the invention, the outer ring has between the raceways a recess and

lubrication ports.

  Used for example for the drum vibratory mill excitation shaft, a bearing thus produced has the advantage of ensuring, during the start-up of the mill, a driving effect of the sets of rollers, so that the paths internal rings do not slip. In addition, the realization in one piece of the ring

  external reduces the wear of the ring in the bore of the housing.

  Finally, the grease can easily penetrate the bearing during the re-greasing, the centrifugal force leading to the bearing tracks of

the outer ring.

  The following description presents in more detail the invention in

  using an example of embodiment shown in the accompanying drawing.

  The single figure shows the sectional view of a rolling bearing with

  double row of cylindrical rollers.

  The cylindrical roller bearing consists of an outer ring 2 in one piece provided with two raceways 3, cylindrical rollers 4 and two inner rings 5. The ring

  2 shows in the middle part of its bore an

  6 and a hole 7 extending radially.

  to introduce a lubricant. By lubricating orifices 8, the lubricant arrives directly to the races 3. The inner rings 5 are provided with shoulders 9 and are installed on the shaft 1 spaced from each other by an axial distance A. The distance A between the end faces 10 facing each other of the inner rings 5 corresponds to the width of the collar 11 of the shaft, so that the bearing is fixed in the axial direction on the shaft 1. The rolling bodies 4 are arranged in cages 12 guided on the upper surfaces 13 of the shoulders 9. When placing the bearing, the outer ring 2 is first inserted into the bore of a housing 14 (suggested on the face). To mount it, this ring 2 in one piece can be easily cooled, and

  fitted tightly in the bore 15 of the housing. We then slide

3 -

  on the shaft i the inner rings 5 with the rollers 4, jus-

  that they stumble against the front faces 16 of the collar 11 of

  the tree. After installing the spacer rings 17 and the rods

  18, the lids 19 of the housing are placed in place.

  which is fixed by screw to housing 14.

  The exemplary embodiment presented above is in no way

  tative. It is entirely possible in the context of the invention of

  modify the construction of the different rooms.

-4 -

Claims (2)

  1. Bearing, in particular for the excitation shaft of grinders vi-   drums or similar machines with a bearing   double row of rollers, where one of the bearing rings is   one piece without shoulders and o the other bearing ring   consists of two separate rings with shoulders, which are   characterized in that the two inner rings (5) provided with shoulders (9), on the upper faces (13) of which rest with a small clearance the cages (12), are arranged spaced from each other in the   axial direction by a collar (11) of the shaft or the like.   Bearing according to Claim 1, characterized in that the outer race (2) has a bearing race (3) between   recess (6) and lubrication holes (7).