DE1947337U - ELASTIC ROLLER BEARING. - Google Patents

Description

RA.42912WILe.68. ".Iy,

BROWF, BOVERI & CIE AG:

Mannheim · . " .. '- -. -

Mannheim, February 24, 1966 Pat. Ld / Pr

Mp. He. 541/66

■ Elastic roller bearing

When storing shafts, especially those that are exposed to radial and axial impacts, it is advantageous to in order to reduce the mass impact forces, a small amount of axial and radial leathering is possible. Constructions about this have become known; z. B. by spring washers, which rest axially against the rolling bearing rings, or by means of spring lamellas, which are attached to the circumference of the outer ring of the rolling bearing are arranged. It is sometimes advantageous to axially brace roller bearings in order to eliminate the axial clearance to bring, whereby an additional side impact force reduction is guaranteed. Even with constructions, which high thermal stresses are exposed, one must have certain suspension elements in the axial and especially in the radial direction provide, which the, due to the thermal expansion en * conditional radial tensioning of the rolling bearing and thus preventing the rollers or balls from being constrained. One can then with constructions, which are subject to thermal expansion, it is advantageous to install bearings that have very little internal clearance. With some Constructions, especially in the case of shafts for cantilevered, supported gears, it is due to the torque transmission always existing elastic bending deformations of the shafts necessary that spherical roller bearings are used to to avoid ten pressures in the rolling elements. .

It is therefore desirable for certain applications to connect a roller bearing with its surroundings that it allows an axial suspension, a radial suspension and a cardanic movement of the .bearing shaft relative to the storage. : "■■■■. ''.;'"'-. .- ■■ '■■■ ■■ _..-; ■

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. The purpose of the invention is to bring about all of these advantages by 'the arrangement of an elastic layer in the outer ring of the roller bearing. Preferably one becomes this elastic layer to ensure the better gimbal movement and a greater axial To get spring constant; run in spherical form.

In Figure 1 z. B. is the concept of the invention for a roller bearing shown. The outer ring of the rolling bearing shown, which consists of the inner ring 5 and the rolling elements 4 is divided into two concentric partial rings, namely a race 3 and a fastening ring 1, which by an intermediate layer of elastic material 2 to each other are connected. The elastic layer is useful designed spherically and can advantageously consist of rubber 2. which is vulcanized onto the raceway 3 and the fastening ring 1 is. This rubber layer 2 will advantageously be prestressed in the radial direction. This bias can be achieved by calibrating the fastening ring 1 after Vulcanize. In some cases it will be advantageous to divide the fastening ring 1 into segments in order to provide an attachment. to ensure pressure in the mounting hole.

FIG. 2 shows a correspondingly designed ball bearing. FIG. 3 shows the possibility of axial movement present in the invention and axial suspension with restoring force. FIG. 4 shows the gimbal that is present in the invention Possibility of movement. The possibility of radial movement is due to "the suspension in the radial direction within the rubber ' layer guaranteed. Due to the radial suspension within the In the rubber layer, forces caused by thermal expansion in the radial direction are avoided, as well as the mass impact forces in the radial direction Direction lower. The particular advantage of the construction is that the arrangement of the rubber layer inside There is no metallic connection between the shaft and the bearing bore of the outer ring. This means that a " Structure-borne sound insulation instead, which is particularly desirable for bearings on gear shafts. In addition, the present. Invention has the great advantage that the arrangement of the rubber layer within the outer ring of the rolling bearing in

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Compared to all previously known designs that have the suspension elements outside of the rolling bearing, leads to a unitary component that is optimally small Has outer diameter and can be manufactured in terms of production in a simple and compact unit. the The height and width of the rubber layer depends on the ratio of the permissible maximum or static radial load of the Y rebate bearing and that of the speed depending on the application: and service life expectancy dependent small permissible operating radial load dependent. In some cases it can therefore be advantageous, especially if you have an axial suspension want to have and also "a large radial force is present, the rubber layer is multilayered, d. H. to be carried out with vulcanized metal spacer rings. The desired compressive bias within As mentioned, the rubber layer can also be segmented of the 'outer ring or by dividing the outer ring in "circumferential direction along with axial bracing. Off For manufacturing reasons, it may be advantageous to have the race J connected to one another in two by a tight fit or a press fit Divide rings.

The elastic roller bearing is advantageous for devices or - ■ Use units that are exposed to vibrations, shocks, oscillations or impacts. By in all Levels of elasticity are in particular the stresses that are dependent on the oscillation frequency and the inertia forces. chungsspitζen lower, resulting in a longer service life of the Rolling bearings and the devices or aggregates leads. In vehicle construction, especially for. the use in cradle bearing motors for electric Locomotives, roller axle bearings for rail vehicles, electrical machines in rail vehicles and also in the motor vehicle sector the mentioned technical advantages can be expected when using the elastic roller bearing. Simultaneously are undesirable in ■ electric traction vehicles. Current transfers through the roller bearings are avoided, as the elastic layer has an insulating effect.

Claims (6)

■ - 4 - 541/66 I .; RA. ι <2512Μ 6.8.66 Pat. 1. Elastic rolling bearing, characterized in that . the outer ring in two concentric rings, namely a race ring (3) and a fastening ring (l) is divided, which are connected together by an intermediate layer (2) of resilient M _a TERIAL. 2. Elastic rolling bearing according to claim 1, characterized in that that the race (3) consists of two concentric ones that are connected to one another by plague or press fit Partial rings exist. 3. Elastic rolling bearing according to claim 1 or 2 characterized; characterized in that the intermediate layer (2) made of elastic material 'is spherical in shape. 4. Elastic rolling bearing according to Claim 1 or 2 or 3 characterized in that the elastic intermediate layer (2) consists of natural or artificial rubber and on the rings are vulcanized. 5. Elastic rolling bearing according to claim 4, characterized in that the rubber layer is biased to pressure. 6. Elastic rolling bearing according to one of the existing claims characterized in that the fastening ring (I) -in .Segments is divided.