JP2007010083A - Rolling bearing with rotary sensor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a trouble in a fit with a bearing shaft or a casing even if a rotary part or a fixed part of a rotary sensor is pressed into an outer ring end or an inner ring end. <P>SOLUTION: A step 11 as an escape part is formed on the internal diameter surface of the extensional end 1a of an inner ring 1 in the back face side into which a press-in ring 9 is inserted as a fixed part provided with a detection element 8a of the rotary sensor. By this way, the fit with the bearing is so designed as not to cause any trouble even if the internal diameter surface of the extensional end 1a of the inner ring 1 is elastically deformed by press-in pressure so as to shrink a diameter. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rolling bearing with a rotation sensor, and in particular, rolling with a rotation sensor in which at least one of a rotating part and a fixed part of a rotation sensor is fixed to an inner diameter surface of an outer ring end or an outer diameter surface of an inner ring end by press-fitting. Related to bearings.

  A rolling bearing with a rotation sensor to which a rotation sensor is attached may be used as a bearing that supports an output shaft of an engine or motor or a bearing that supports a wheel in order to detect the rotation speed or rotation angle. In order to facilitate the mounting of the rotation sensor, the rolling bearing with the rotation sensor includes a rotating portion having a rotation element of the rotation sensor and a fixing portion having a detection element for detecting the rotation of the rotation element. Some are fixed to the inner diameter surface of the end portion or the outer diameter surface of the inner ring end portion by press-fitting (for example, see Patent Document 1). In what is described in Patent Document 1, a rotating part having a pulsar ring as a rotating element is press-fitted into an end of the rotating side raceway, and a press-fitting ring as a fixing part having a detecting element is inserted into the fixed side raceway. It is press-fitted into the end.

Japanese Utility Model Publication No. 5-55070 (Figs. 2 and 6)

  In a rolling bearing with a rotation sensor in which the rotation part and the fixed part of the rotation sensor described above are fixed to the outer ring end part and the inner ring end part by press-fitting, the rotation part and the fixed part have an anti-extraction force (for example, 10 kgf or more) required for fitting. ) Can be secured with a large tightening allowance. For this reason, when they are press-fitted into the inner diameter surface of the outer ring end by this press-fitting pressure, they are elastically deformed so that the outer diameter surface on the back side expands and are press-fitted into the outer diameter surface of the inner ring end. In this case, there is a problem that the inner diameter surface on the back side is elastically deformed so as to reduce the diameter, and the fitting with the shaft or casing to which the bearing is attached is hindered.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to prevent the fitting with the shaft and casing of the bearing from being hindered even if the rotating part and the fixed part of the rotation sensor are press-fitted into the outer ring end part and the inner ring end part. It is.

  In order to solve the above-described problems, the present invention provides at least one of the rotating part and the fixing part of a rotation sensor including a rotating part having a rotating element and a fixing part having a detection element for detecting the rotation of the rotating element. In a rolling bearing with a rotation sensor fixed to the inner diameter surface of the outer ring end portion or the outer diameter surface of the inner ring end portion by press-fitting, the outer portion of the outer ring end portion on the back surface side where the rotating portion or fixed portion of the rotation sensor is press-fitted. A configuration in which a relief portion is provided on the radial surface or the inner diameter surface of the inner ring end is adopted.

  That is, by providing a relief portion on the outer diameter surface of the outer ring end portion on the back surface side where the rotating portion or the fixed portion of the rotation sensor is press-fitted or on the inner diameter surface of the inner ring end portion, the outer diameter surface of the outer ring end portion is changed by the press-fitting pressure. Even if it is elastically deformed so as to expand its diameter or is elastically deformed so that the inner diameter surface of the inner ring end is reduced, it does not hinder the fitting with the shaft and casing of the bearing.

  The relief portion may be formed with a taper or a step.

  In the rolling bearing with a rotation sensor of the present invention, the relief portion is provided on the outer diameter surface of the outer ring end on the back surface or the inner diameter surface of the inner ring end where the rotation portion or the fixed portion of the rotation sensor is press-fitted. Even if it is elastically deformed so that the outer diameter surface of the outer ring end portion is expanded, or it is elastically deformed so that the inner diameter surface of the inner ring end portion is reduced, it interferes with the fitting of the shaft and casing of the bearing. You can avoid it.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a first embodiment. This rolling bearing with a rotation sensor is a double-row ball bearing in which two rows of balls 3 are held by a cage 4 between an inner ring 1 and an outer ring 2, and the inner ring 1 is a fixed ring and the outer ring 2 is a rotating ring. Contact seals 5 and 6 for sealing the bearing space are attached to the inner diameter surfaces of both ends of the outer ring 2.

  A pulsar ring 7 as a rotating element of a rotation sensor is attached to the core 5a of the contact seal 5 attached to one end of the outer ring 2, and the outer diameter surface of the extended end 1a of the inner ring 1 extended to the outside thereof. In addition, a press-fitting ring 9 is press-fitted as a fixed portion provided with a detection element 8a of a rotation sensor and an electric circuit board 8b, to which an output cable 8c is connected. A seal lip 10 is also attached to the press-fitting ring 9, and the seal lip 10 comes into contact with the inner diameter surface of the extended end 2a extended to one end of the outer ring 2 to seal the detection part of the rotation sensor. .

  The extension end 1a of the inner ring 1 and the extension end 2a of the outer ring 2 are formed to be thin in order to secure a space for mounting the rotation sensor, and the extension end 1a of the inner ring 1 into which the press-fit ring 9 is press-fitted. On the inner diameter surface on the back side, a step 11 is formed as an escape portion for releasing the reduced diameter due to elastic deformation during press-fitting.

  FIG. 2 shows a second embodiment. This rolling bearing with a rotation sensor is also a double row ball bearing similar to that of the first embodiment, and the pulsar ring 7 as the rotating element is press-fitted into the inner diameter surface of the extended end portion 2a of the outer ring 2, and its back surface. A difference is that a taper 12 is formed on the outer diameter surface on the side as a relief portion for escaping the diameter expansion due to elastic deformation during press-fitting. In this embodiment, the pulsar ring 7 also serves as a shield, and the contact seal 5 on one side is omitted. Other parts are the same as those of the first embodiment.

  In each of the above-described embodiments, the rolling bearing is a double-row ball bearing having an outer ring as a rotating ring. However, the rolling bearing with a rotation sensor according to the present invention is another type of rolling bearing such as a single-row ball bearing or a roller bearing. It can also be applied to bearings. It can also be applied to a rolling bearing with an inner ring as a rotating ring. In this case, the rotation part of the rotation sensor is provided on the inner ring side, the fixed part is provided on the outer ring side, and at least one of them is provided at the end of these bearing rings. Just press fit.

Partially omitted vertical sectional view showing a rolling bearing with a rotation sensor according to the first embodiment Partially omitted vertical sectional view showing a rolling bearing with a rotation sensor of a second embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inner ring 2 Outer ring 1a, 2a Extension end 3 Ball 4 Cage 5, 6 Contact seal 5a Core metal 7 Pulsar ring 8a Detection element 8b Electric circuit board 8c Output cable 9 Press-fit ring 10 Seal lip 11 Step 12 Taper

Claims (2)

  At least one of the rotating part and the fixing part of the rotation sensor including a rotating part provided with a rotating element and a fixing part provided with a detecting element for detecting the rotation of the rotating element is used as an inner diameter surface of the outer ring end or an inner ring. In a rolling bearing with a rotation sensor fixed to the outer diameter surface of the end portion by press-fitting, escape to the outer diameter surface of the outer ring end portion on the back surface side or the inner diameter surface of the inner ring end portion to which the rotating portion or fixed portion of the rotation sensor is press-fitted. A rolling bearing with a rotation sensor, characterized in that a portion is provided.   The rolling bearing with a rotation sensor according to claim 1, wherein the relief portion is formed with a taper or a step.

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