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Sealing device for a wheel-hub unit and wheel-hub unit equipped with such a sealing device

A technology of sealing device and wheel hub unit, which is applied in the direction of wheel hub, measuring device, caster, etc., and can solve the problems of reduced signal emission, wear of shielding parts, and wear of the magnetized part of the sound wheel, etc.

Active Publication Date: 2019-06-25
AB SKF
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] This unintentional contact over time leads to wear of the shield, which in some cases can negatively affect the sealing ability, as well as wear of the magnetized part of the tonewheel, resulting in a reduction in the signal it emits

Method used

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  • Sealing device for a wheel-hub unit and wheel-hub unit equipped with such a sealing device

Examples

Experimental program
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Effect test

Embodiment Construction

[0014] Referring to the drawings, 1 generally denotes a sealing device for a hub unit 2 .

[0015] The unit 2 is provided with a rolling bearing 3 comprising an outer ring 4 coaxial with the axis of rotation A of said bearing 3 (shown schematically in the drawing) and an inner ring 5 coaxial with the outer ring 4 and a plurality of rolling members ( / rolling bodies) 8, such as balls, arranged between the outer ring 4 and the inner ring 5, so that the inner ring 5, which is allowed to rotate during use, is opposed to the outer ring 4, which is fixed during use rotate. The outer ring 4 of the bearing 3 has a collar 41 delimited by an annular front surface 43 , a cylindrical inner surface 44 and a cylindrical outer surface 45 . Instead the inner ring 5 is provided with a phonic wheel 51 rigidly connected to the inner ring 5 and having: a mounting support 52 preferably defined by a folded sheet metal having an L-shaped cross-section; and A ring 53 of ferromagnetic material, fixed...

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Abstract

A sealing device (1) for a wheel-hub unit (1) provided with a rolling bearing (3) and having a central axis (A) is provided with a shielding member (6) joined together with an outer ring (4) of the bearing so as to sealingly isolate the bearing, and then is equipped with a cylindrical mounting wall (61) coaxial with the central axis and engaged with a collar (41) of an outer ring of the bearing, and an annular reading wall (63), arranged transversely with respect to the axis (A), connected to the cylindrical wall (61) and facing a phonic wheel (51) mounted inside the bearing. The thickness (S)of the annular reading wall (63) can be variable radially depending on an angle (alpha) of oscillation of the phonic wheel between an undeformed position of the annular front surface (53a) of the phonic wheel equidistant from the plane P perpendicular to the axis (A) and a possible deflection position of the annular front surface (53a), which may be arranged to be equidistant from the annular reading wall but not in contact with the annular reading wall, of the phonic wheel.

Description

technical field [0001] The invention relates to a sealing device for a hub unit. The invention also relates to a hub unit equipped with the sealing device. [0002] The invention is particularly, although not exclusively, applicable in the field of hub units of motor vehicles provided with (vehicle) wheel rolling bearings. In these applications, the inner ring of the bearing is keyed to the (axis) of the (vehicle) wheel and transmits its subsequent rotational motion, while the outer ring of the bearing is keyed to a fixed (wheel) hub, For example the (wheel) hub of a motor vehicle suspension. The ensuing description will refer to this specific application by way of example, without thereby losing its general character. Background technique [0003] Known types of seals have an axisymmetric "cup" form which is intended to be closed centrally ( / closed in the center) in non-drive wheel applications, thus having no shaft passing along the axis of the bearing, and The outer r...

Claims

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Application Information

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IPC IPC(8): F16C33/76
CPCF16C2240/60F16C33/7816F16C33/7879F16C41/007F16C19/186G01P3/443F16C2326/02F16C2240/30B60B27/0073B60B2900/511F16C33/78
Inventor 多梅尼科·博斯克达尼埃莱·杜赫
Owner AB SKF
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