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Rolling bearing unit with encoder for supporting 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: 2016-05-25
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 wheel
  • Rolling bearing unit with encoder for supporting wheel
  • Rolling bearing unit with encoder for supporting wheel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0068] 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).

[0069] 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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Abstract

The present invention provides a rolling bearing unit with encoder for supporting wheel. Construction is achieved that is able to prevent strain deformation in the axial direction of a flat plate section (21) of a cover (19a) when a cylinder section (20) of the cover (19a), which covers the opening on the inside end in the axial direction of an internal space where an encoder (1) is located, is fitted into and fastened to the inside end section in the axial direction of an outer ring (7). A non-contact section (26a) is formed all the way around the inside end section in the axial direction of the cylinder section (20) such that the outer diameter is smaller than the inner diameter of the inside end section in the axial direction of the outer ring, and the dimension (L26) in the axial direction is two times or more the thickness dimension (t19) of a plate member of the cover (19a). With the cover (19a) fitted into the inside end section in the axial direction of the outer ring (7), only the portion of the cylinder section (20) that is nearer the outside in the axial direction than the non-contact section (26a) is substantially fitted into the inside end section in the axial direction of the outer ring (7) with an interference fit.

Description

[0001] This application is a divisional case of an invention patent application titled "Rolling bearing unit for wheel support with coding device", the international application date is February 7, 2011, the international application number is PCT / JP2011 / 052479, and the national application number is 201180000026.0 Application. technical field [0002] 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 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 techniq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C19/18F16C33/76F16C41/00G01P3/487B60B35/02
CPCB60B35/02F16C19/18F16C33/76F16C41/00G01P3/487B60B7/0013B60B27/0005B60B27/0068B60B27/0073B60B2380/12B60B2380/73B60B2900/325B60B2900/3312B60Y2200/11F16C19/186F16C33/723F16C33/768F16C41/007F16C2240/30F16C2240/40F16C2240/60F16C2326/02G01P3/443
Inventor 猪八重顺也金子吉男永野正人
Owner NSK LTD
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