Rotational speed sensor device

A technology of speed sensor and detection sensor, applied in the field of speed sensor device and double row rolling bearing, can solve the problem of not considering the temperature measurement of double row rolling bearing 1, etc.

Inactive Publication Date: 2003-04-23
NSK LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the example of the conventional structure described in Japanese Patent No. 2838701, only the rotation speed detection of the inner ring 7 is considered, but the vibration generated in the double row rolling bearing 1 part and the temperature measurement of the double row rolling bearing 1 are not considered

Method used

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Embodiment Construction

[0079] Similar to the conventional rotational speed sensor device as described above, the rotational speed sensor device of the present invention includes an encoder supported by a rotating sleeve for supporting a rolling bearing unit of a wheel concentric with the rotating sleeve so that the characteristic of the detected part or the encoder Alternating in the circumferential direction, and a rotation detection sensor supported by a non-rotating part so that its detection part surface faces the detected part or the encoder. The detection signal of the rotation detection sensor is sent to the controller installed on the chassis side by wireless transmission.

[0080] In particular, the rotational speed sensor device according to the present invention is equipped with a self-diagnostic circuit to determine whether there is any problem or abnormality in detecting the rotational speed.

[0081] Using the rotational speed sensor of the present invention, the function of detecting ...

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Abstract

A rotation-speed sensor device is provided, comprising an encoder supported by a rotating race of a rolling bearing unit for vehicle wheel support to be concentric with the rotating race and having a detected portion the characteristics of which are alternately changed in a circumferential direction, a rotation detection sensor supported by a non-rotating member on the vehicle chassis side and having a detecting portion facing the detected portion to produce a detection signal, a wireless transmission device for sending the detection signal from the rotation detection sensor to a controller provided on the vehicle chassis side, and a self-diagnosis circuit to judge whether there is an error or not in the rotation detection sensor.

Description

technical field [0001] The present invention relates to a rotational speed sensor device, and in particular to a rotational speed sensor device for detecting the rpm of an automobile wheel. [0002] The present invention relates to a double row rolling bearing with a sensor unit for rotatably supporting a wheel of a locomotive or an automobile, or a rotating shaft of a metalworking mill, to a frame or a suspension system that does not rotate even in use, and to detect the double row rolling bearing the state of the part. The double row rolling bearing with sensor unit can effectively detect the rotation speed of the wheel, shaft, etc., and detect the state (temperature, vibration, etc.) of the double row rolling bearing, so as to judge the presence / absence of errors or abnormalities in the double row rolling bearing part. Background technique [0003] In order to control the anti-lock braking system (ABS) or the traction control system (TCS) in order to maintain the car's s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P1/02G01P3/44
CPCF16C2326/02F16C41/004F16C19/34G01P3/446G01P3/443B60C23/0408F16C41/007B60C23/042G01P1/026F16C41/008F16C19/185F16C19/186F16C19/386
Inventor 森田耕一坂谷郁纪远藤茂宫崎裕也坂本润是中村雄二
Owner NSK LTD
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