Rolling bearing unit with encoder for supporting drive wheel

A coding device and rolling bearing technology, applied in wheel bearings, rolling contact bearings, bearing components, etc., can solve the problems of density deviation, which is not conducive to ensuring the reliability of rotation speed detection, and achieve the effect of ensuring reliability and preventing strain deformation.

Active Publication Date: 2012-05-30
NSK LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the density of the magnetic flux emitted from the detected surface of the encoder body 24 and reaching the detection portion of the sensor 4 varies, which is not conducive to ensuring the reliability of rotation speed detection.

Method used

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  • Rolling bearing unit with encoder for supporting drive wheel
  • Rolling bearing unit with encoder for supporting drive wheel
  • Rolling bearing unit with encoder for supporting drive wheel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0067] An example of a test conducted to confirm the effects of the present invention will be described below. In the test, using Figure 5 Cover 19c of the third example shown. Cover 19c with thickness dimension t 19 Made of 0.6mm SUS304 material. The outer diameter dimension D of the cover 19c 19 57mm, axial length L 19 7.8mm, the value of the interference (the inner diameter of the axially inner end of the outer ring 7 and the outer diameter D of the cover 19c 19 The absolute value of the difference) is 0.18mm (180μm).

[0068] Further, the cap 19c is provided with a partial conical convex portion with an axial dimension of 2.2 mm and an inclination angle α of approximately 20 degrees. The cylindrical portion 20 of the cap 19c is fitted into the axially inner end portion of the outer ring 7 . In this state, the predetermined position near the outer diameter of the flat plate portion is 0, and the amount of deformation of the portion of the flat plate portion 21 facin...

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PUM

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Abstract

A structure is realized which can prevent a flat-plate portion (21) of a cover (19a) from being distorted or deformed in the axial direction when a cylindrical portion (20) of the cover (19a) for blocking an axial inner end opening of an inner space (17) in which an encoder (1) is installed is securely fitted into an axial inner end portion of an outer ring (7). On the entire circumference of an axial inner end portion of the cylindrical portion (20), formed is a non-contact portion (26a) which has an outer diameter less than the inner diameter of the axial inner end portion of the outer ring (7) and an axial size (L26) that is equal to or greater than two times the thickness size (t19) of the plate member constituting the cover (19a). Then, with the cover (19a) fitted in the axial inner end portion of the outer ring (7), the cylindrical portion (20) is fitted into the axial inner end portion of the outer ring (7) substantially by interference fit only of a portion that is located axially outward with respect to the non-contact portion (26a).

Description

technical field [0001] The present invention relates to a rolling bearing unit that rotatably supports a wheel of a motor vehicle with respect to a suspension device, and is attached with an encoding device (encoder) for detecting the rotational speed of the wheel. More specifically, it relates to an improvement of a rolling bearing unit for supporting a wheel with an encoding device. The rolling bearing unit for supporting a wheel with an encoding device has a cover that closes an opening at an axial inner end of an internal space where the encoding device is provided. A structure that is fitted and fixed at the axially inner end of the outer ring. Background technique [0002] Various structures are known in the prior art as a rolling bearing unit that rotatably supports a wheel on a suspension device of a motor vehicle and is attached with a rotation speed detection device for detecting the rotation speed of the wheel. In either structure, the detection part of the senso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60B35/02F16C19/18F16C33/76F16C41/00G01P3/487
CPCF16C33/723G01P3/487F16C33/768F16C41/007B60B35/02B60Y2200/11B60B27/0005F16C2326/02B60B27/0068B60B2900/3312B60B2900/325F16C19/186B60B2380/12B60B2380/73G01P3/443F16C19/18F16C33/76F16C41/00B60B7/0013B60B27/0073F16C2240/30F16C2240/40F16C2240/60
Inventor 猪八重顺也金子吉男永野正人
Owner NSK LTD
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