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Bearing Apparauts for a Wheel of Vehicle

a technology for bearings and vehicles, applied in mechanical devices, rigid supports of bearing units, transportation and packaging, etc., can solve problems such as complicated assembly of bearing apparatuses, and achieve the effect of reducing weight, size and number of parts

Inactive Publication Date: 2007-12-13
NTN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007] It is therefore an object of the present disclosure to provide a vehicle wheel bearing apparatus which can reduce the weight, size and the number of parts. Also, a bearing apparatus can prevent the ingress of rain water or dusts and the leakage of differential gear oil.

Problems solved by technology

Also, the assembly of the bearing apparatus is complicated due to the requirement of a large number of structural parts.

Method used

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  • Bearing Apparauts for a Wheel of Vehicle
  • Bearing Apparauts for a Wheel of Vehicle
  • Bearing Apparauts for a Wheel of Vehicle

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0034]FIG. 1 is a longitudinal-section view of a vehicle wheel bearing apparatus. FIG. 2 is a partially enlarged longitudinal-section view of FIG. 1. In the present description, a side of the bearing positioned outward of a vehicle, when it is mounted on the vehicle, is referred to as the “outboard” side (the left side in a drawing). A side inward of the vehicle is referred to as the “inboard” side (the right side in a drawing).

[0035] In the vehicle wheel bearing apparatus, a wheel hub 1 and a double row rolling bearing 2 are formed as a unit and are connected to a drive shaft “D / S”. The double row rolling bearing 2 includes an inner member 3, an outer member 4, and double row rolling elements (tapered rollers) 5 freely rollably contained between the inner and outer members 3 and 4. The inner member 3 includes the wheel hub 1 and a pair of inner rings 10 press-fit onto the wheel hub 1. The wheel hub 1 is integrally formed, at its outboard side, with a wheel mounting flange 6 on whic...

third embodiment

[0048]FIG. 5 is an enlarged partial view of a vehicle wheel bearing apparatus. The same numerals are used as those in the previous embodiments to designate the same structural elements.

[0049] In this embodiment, a cap 21 is press-fit into an opening of the wheel hub 1 at its outboard side. The cap 21 is made of austenitic-stainless steel sheet (JIS SUS 304 etc.) or preserved cold rolled steel sheet (JIS SPCC etc.) and includes a metal core 21a formed from steel. The cap 21 has a substantially “C”-shaped cross-section. An elastic member 21b extended from the inner circumferential surface to the cylindrical fitting portion of the metal core 21b. The elastic member 21b is formed from a material such as rubber bonded, via vulcanization, to the surface of the metal core 21a. The elastic member 21b functions to prevent the generation of rust on the metal core 21a and seals the inside of the wheel hub 1 from the outside with intimate contact of the elastic member 21b to the inner circumfer...

fourth embodiment

[0051]FIG. 6 is an enlarged partial view of the vehicle wheel bearing apparatus. The same numerals are used as those used in the previous embodiments to designate the same structural elements.

[0052] In this embodiment, an annular recess 25, having a circular arc cross section, is formed on the inner circumferential surface (bore) of the wheel hub 1. A cap 26 is formed with a projection 26a having a cross section corresponding to the annular recess 25. The cap 26 is snapped into the recess 25. This makes the mounting of the cap 26 easy and also prevents axial movement of the cap 26 with a simple structure. In this case, it is unnecessary to form the projection 26a on the whole circumference of the cap 26. Thus, three or more projections will sufficiently perform this function.

[0053]FIG. 7 is a partially enlarged longitudinal-section view of a modification of the fourth embodiment. The same numerals are used as those used in the previous embodiment (FIG. 6) to designate the same stru...

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PUM

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Abstract

A vehicle wheel bearing apparatus which reduces the weight, size and number of parts and also prevents ingress of rain water or dusts and leakage of differential gear oil has an axle housing supported under a body of a vehicle. A hollow drive shaft is inserted into the axle housing. A wheel bearing is arranged between the drive shaft and an opening of the axle housing and is structured as a unit including a wheel hub and a double row rolling bearing. The wheel bearing includes an inner member with a wheel hub integrally formed with a wheel mounting flange on one end and an axially extending cylindrical portion. At least one inner ring is press-fit onto the cylindrical portion of the wheel hub. The inner ring is formed with at least one of the inner raceway surfaces on its outer circumferential surface. An outer member is arranged around the inner member and formed with double row outer raceway surfaces on its inner circumferential surface opposite to the inner raceway surfaces. Double row rolling elements are arranged between the inner and outer raceway surfaces of the inner member and the outer member. A cage freely rollably holds the rolling elements. Seals seal an annular space between the inner member and the outer member. A cap, having a metal core formed from steel, is press-fit into an end of a central bore of the wheel hub.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application is a National Stage of International Application No. PCT / JP2004 / 015144, filed Oct. 14, 2004, which claims priority to Japanese Patent Application No. 2003-401112, filed Dec. 1, 2003, Japanese Patent Application No. 2004-0079683, filed Mar. 19, 2004 and Japanese Patent Application No. 2004-269093, filed Sep. 16, 2004. The disclosures of the above applications are incorporated herein by reference.FIELD [0002] The present disclosure relates to a vehicle wheel bearing apparatus to rotatably support the wheel relative to a suspension apparatus of the vehicle and, more particularly, to a vehicle wheel bearing apparatus of the semi-floating type where a driving wheel is supported by a double row rolling bearing. BACKGROUND [0003] In a vehicle such as a truck having a body with a frame structure, an axle structure of a driving wheel of a full-floating type bearing has been widely adopted. In recent driving wheel supporting stru...

Claims

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Application Information

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IPC IPC(8): F16C19/28B60B27/00B60B35/14F16C19/38F16C33/60F16C33/64F16C33/72F16C33/76F16C35/063F16J15/06F16J15/08
CPCB60B27/00B60B35/121F16C19/386F16C2326/02F16J15/04F16J15/121Y02T10/86F16C35/063F16C43/04
Inventor KAWAMURA, HIROSHISHIGEOKA, KAZUHISAFUJIMURA, AKIRANISHINO, KOJIOHTSUKI, HISASHI
Owner NTN CORP