Hub bearings with light alloy rotor hubs
A kind of wheel hub bearing and bearing technology, which is applied in the direction of rotary motion bearings, wheel hubs, bearings, etc., can solve problems such as unfavorable axial dimensions and inability to obtain flanged hubs.
Active Publication Date: 2019-06-07
AB SKF
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- Description
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- Application Information
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Problems solved by technology
This means that the flanged hub is made of high strength material (such as steel used in the cited prior art) to limit the thickness and thus the overall size of the flanged part
Optionally, flanged hubs give the flange part a large thickness, to the detriment of the overall axial dimension, if they are made of a lighter and low mechanical resistance material, such as aluminum or other lightweight alloys
Thus, the known solution has the disadvantage of not being able to obtain a flanged hub that is both lightweight and of small size
Method used
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[0020] according to figure 1 , the wheel hub bearing according to the first embodiment of the present invention, denoted as a whole by 10 .
[0021] Assembly 10 includes hub 20 and bearing unit 30 . Throughout this description and the claims, terms and expressions indicating position and direction such as "radial" and "axial" refer to the axis of rotation X of the bearing unit 30 . Whereas the terms "axially outer" and "axially inner" refer to the conditions of installation, in this case respectively to the motor wheel side and to the opposite side.
[0022] The bearing unit 30 comprises a radially outer ring 31 , a pair of stationary radially inner rings 32 , 33 , and two sets of rotatable rolling elements 34 , 35 , in this example balls, arranged between the outer ring 31 and the inner ring 32 , Between 33.
[0023] The stationary outer ring 31 has an axially extending tubular body portion 31 a internally defining a raceway for the rolling elements 34 , 35 .
[0024] The...
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A wheel hub bearing assembly (10, 110, 210) is provided with: a bearing unit (30), including a stationary radial outer ring (31), a pair of rotatable radial inner rings (32, 33) and two rows of Rolling elements (34, 35), which are arranged between the radially inner ring and the radially outer ring, their centers arranged with respect to the axis of symmetry (X) of the hub bearing assembly (10, 110, 210) along a radius of The first arc of (R), the rotor hub (20, 120, 220) is rotatable and made of lightweight alloy, with a radial inner ring (32, 33) installed on its upper part, the rotor hub includes a tubular portion (21, 221), the flange part stably fixed to the tubular part (21, 221), axially externally provided with a plurality of fixing holes (24), relative to the axis of symmetry (X) of the hub bearing assembly (10, 110, 210) Their axes are arranged along a second arc of a circle with a radius (r), the radius (R) of the first arc of the center of the rolling elements (34, 35) being greater than the radius of the second arc of the axis of the fixing hole (24) (r).
Description
technical field [0001] The invention relates to a hub bearing assembly comprising a light alloy hub configured as a rotor. The assembly is suitable for applications where the inner ring of the bearing is rotatable, in other words for a drive wheel of a motor vehicle. Background technique [0002] Known in the art are flanged hub bearing assemblies for drive wheels of motor vehicles. One example is described in European patent EP1031439B1 and comprises a radially outer ring, a pair of radially inner rings and two rows of rolling elements (in this application, balls) arranged radially between the outer ring and the pair of inner rings . The outer ring has a cylindrical outer surface adapted to be forcibly inserted into a cartridge seat formed at the joint of the suspension. The radially inner ring is mounted to a steel hub, connected in a known rotatable manner to the end of a main shaft or shaft of a motor vehicle transmission unit. [0003] The flanged hub has a flange p...
Claims
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IPC IPC(8): F16C19/18F16C33/66F16C33/32
CPCB60B27/00B60B27/0005B60B27/0042B60B27/0052B60B27/0084F16C2326/02F16C35/063F16C19/184F16C2240/80F16D2003/22326
Inventor D·博思科L·斯古奥蒂
Owner AB SKF