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Wheel bearing sealing device

A technology of wheel bearings and sealing devices, which is applied in bearing assembly, bearings, axles, etc., can solve problems such as muddy water ingress, sealing device damage, sealing member fastening force and follow-up ability degradation, etc., so as to improve the sealing performance and eliminate the sealing performance The effect of the change

Active Publication Date: 2014-12-17
NTN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of sealing devices in harsh environments with low temperature and muddy water is one of the causes of premature failure of sealing devices
It is worrying that even if the sealing member is formed of a material with improved low-temperature performance, the buckling force and followability of the sealing member will deteriorate due to the decrease in elasticity in the low-temperature environment, which will cause muddy water to enter the bearing interior prematurely.

Method used

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  • Wheel bearing sealing device
  • Wheel bearing sealing device
  • Wheel bearing sealing device

Examples

Experimental program
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Embodiment approach

[0035] One embodiment of the present invention will be described with reference to the drawings.

[0036] figure 1 is a longitudinal section of an embodiment of the wheel bearing sealing device of the present invention; figure 2 yes figure 1 A partially enlarged view showing a sealing device; image 3 is showing figure 2 An explanatory diagram of the total fastening force of the sealing device; Figure 4 is an explanatory diagram showing the fastening force under the condition that the dust lip is not provided with a clamping coil spring; Figure 5 is a graph showing the measurement results of the fastening force of the radial lip under a severe environment at normal temperature; and Figure 6 It is a graph showing the measurement results of the fastening force of the radial lip in a severe environment of low temperature. In the description of this specification, the outer side of the sealing device when installed on the vehicle is referred to as "outer side" ( fig...

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Abstract

Provided is a wheel bearing sealing device that sets the optimum specification based on the tension force of a radial lip in a pack seal and improves the sealing performance in low-temperature environments and muddy water environments. The wheel bearing sealing device comprises a seal plate (12) constituted by a seal member (15) bonded to a cored bar (14) through adhesion by vulcanization, and a slinger (13) that includes a cylindrical portion (13a) and a vertical plate portion (13b) extending outward in the radial direction. The seal member (15) includes a side lip (15b) which extends outward at an angle in the radial direction and slides against the vertical plate portion (13b) via axial-direction interference, and a radial lip that is formed in a bifurcated shape on an inner diameter side of the side lip (15b) and is constituted by a grease lip (15c) and a dust lip (15d) slide-contacting the cylindrical portion (13a) via radial-direction interference. A garter spring (17) is mounted on the dust lip (15d), and the tension force is set to be 50% or higher of the entire tension force while the tension force in a state where there is no garter spring (17) is set to be at least 3N.

Description

technical field [0001] The present invention relates to a sealing device for a wheel bearing for rotatably supporting a wheel with respect to a suspension device of a vehicle. Background technique [0002] The wheel bearing device is intended to freely rotatably support a hub wheel for mounting a wheel by means of double rows of rolling elements, and there are wheel bearing devices for a driving wheel and a driven wheel. For structural reasons, the inner ring rotation type is used for the driving wheel, and both the inner ring rotation type and the outer ring rotation type are used for the driven wheel. There are four generations of types in wheel bearing devices, namely: the first generation type in which a wheel bearing including a double row angular contact ball bearing etc. is fitted between the knuckle forming part of the suspension device and the wheel hub; Among them, the body mounting flange or the wheel mounting flange is formed directly on the outer circumference ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C33/78B60B35/18F16C19/38F16C41/00F16J15/32F16J15/3212F16J15/3232F16J15/3252F16J15/3284
CPCF16J15/3264F16C33/7813F16C33/7883F16C41/007F16C19/386F16C33/7823F16J15/164F16J15/3212F16C2326/02F16C2240/12F16C2240/46B60B27/001B60B27/0073
Inventor 关诚马场智子
Owner NTN CORP
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