JP2006046558A - Double-row rolling bearing with ic tag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a double-row rolling bearing capable of equalizing rotation balance even though an IC tag is attached, and preventing the impairing of assembling workability, and to prevent the application of bearing load onto the IC tag attached to the bearing. <P>SOLUTION: A non-contact communication-type IC tag 9 is attached to a peripheral face 2a between rolling faces 7, 7 of both rows of a fixed-side ring 2 of the inner ring 2 and outer ring 3. The bearing 1 is an angular ball bearing, and the peripheral face 2a is smaller than a peripheral face 2b at a back face side when parts 2A, 2A of both rows of the inner ring 2 are kept in a face-to-face state. The IC tag 9 is attached to the peripheral face 2a of the smaller diameter. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a double row rolling bearing with an IC tag to which an IC tag is attached in a double row rolling bearing such as an angular ball bearing used in outer ring rotation.

In recent years, there has been an increasing demand for traceability, ie, the ability to pursue the history, application, or location of what is being considered. In the case of a rolling bearing, information such as a production number and a production location is recorded by marking of each part or a laser marker.
IC tags using RFID (Radio Frequency Identification) technology capable of non-contact communication are becoming more compact and widely used in logistics. It has been proposed to attach such an IC tag to a gear or other various mechanical parts and store and manage an ID code and various information associated therewith (for example, Patent Document 1).
JP 2002-049900 A

  In bearings, it is difficult to know detailed information only by using identification information such as markings conventionally used. There are many bearings with different appearances, specifications, etc., such as heat treatment conditions, internal gaps, and encapsulated grease, even though they have the same appearance. In order to know such information, it is necessary to make an inquiry to the manufacturer, which requires time-consuming processing. In addition, the stamp or the like may be difficult to distinguish due to deterioration due to long-term use.

  Therefore, an attempt was made to attach an IC tag in a double row rolling bearing. However, in the case of a rolling bearing, if the IC tag is attached, the rotational balance is lost or the assemblability is lowered. For this reason, it is difficult to select an appropriate mounting location. In addition, when a bearing load acts on the IC tag, there is a concern that the function of the IC tag is deteriorated or damaged during long-term use, and the mounting reliability is lowered.

An object of the present invention is to provide a double row rolling bearing with an IC tag which can make the rotation balance uniform while avoiding the deterioration of assembling while attaching the IC tag.
Another object of the present invention is to prevent a bearing load from acting on an IC tag attached to a bearing.

The double row rolling bearing with an IC tag according to the present invention is a double row rolling bearing in which rolling elements are interposed between the inner ring and the outer ring, and the rolling surfaces of both rows in the fixed side wheel of the inner ring and the outer ring. A non-contact communication type IC tag is attached to the peripheral surface.
According to this configuration, since the non-contact communication type IC tag is attached, it is easy to obtain detailed information about the bearing by recording the bearing identification information and manufacturing information. Since the mounting position of the IC tag is the fixed side wheel of the inner ring and the outer ring, unlike the case of mounting on the rotating side wheel, it is possible to prevent the rotation balance from being lost due to the weight of the IC tag. Some IC tags are small and light, but in rolling bearings, it is necessary to avoid uneven weight as much as possible. Further, since the mounting position of the IC tag is the peripheral surface between the rolling surfaces of both rows, the IC tag is unlikely to become an obstacle when the bearing is assembled.

The present invention is even more effective when the rotating side wheel is an inner ring, that is, when the outer ring rotates. In the case of rotating the outer ring, the outer ring cannot be attached to the housing on the fixed side, so there are many restrictions on the attachment position when attaching the IC tag.
However, by attaching the IC tag to the outer peripheral surface between the rolling surfaces of both rows in the inner ring, it is possible to attach the IC tag without losing the rotational balance and avoiding deterioration in assemblability.

In the present invention, the double row rolling bearing may be a double row angular ball bearing. In that case, the fixed side wheel of the inner ring and the outer ring has both rows facing the front, and the circumferential surface between the rolling surfaces of both rows is farther from the pitch circle diameter position than the circumferential surface on the back side. The IC tag may be attached to a peripheral surface which is located at a remote position.
In the angular ball bearing, because of its contact angle, the bearing load does not act on the front side of the race, and the wall thickness can be reduced. Therefore, it is at a position farther from the pitch circle than the peripheral surface on the back side. By attaching the IC tag to the distant circumferential surface, the IC tag is unlikely to interfere with the holder when the holder is inserted in the assembly process, and deterioration of assembling is avoided. Further, the IC tag is attached to the front side portion of the race, and no bearing load acts on the front side portion, so that the influence of the bearing load on the IC tag itself and its attachment is avoided.

In this invention, each row has a pair of cages for holding rolling elements, and these cages are comb-shaped consisting of a ring portion and a plurality of column portions, and the ring portion is outside the bearing width direction. It may be located.
If it is a comb-shaped cage and the ring portion is located outside, the peripheral surface between the rolling surfaces of the races is in a position that does not interfere with the cage. Therefore, the interference between the cage and the IC tag in the assembly process can be avoided more reliably. In addition, the IC tag can be attached in a wide area without causing a problem of interference between the cage and the IC tag during use, and an allowance can be obtained for restrictions on the external dimensions of the IC tag to be used.

The double row rolling bearing with an IC tag according to the present invention is a double row rolling bearing in which rolling elements are interposed between the inner ring and the outer ring, and the rolling surfaces of both rows in the fixed side wheel of the inner ring and the outer ring. Since the non-contact communication type IC tag is attached to the peripheral surface between them, the uniformity of the rotation balance can be maintained while the IC tag is attached, and the deterioration of assemblability can be avoided.
In addition, in the case of a double row angular contact ball bearing, when an IC tag is attached to a peripheral surface portion where the bearing portions of both rows face each other, the bearing load does not act on the IC tag. Further, it is possible to avoid the deterioration of the function of the IC tag during long-term use and the reduction of the mounting reliability.

  A first embodiment of the present invention will be described with reference to FIGS. This embodiment is an example applied to a double row angular ball bearing, and is used in outer ring rotation. For example, a pulley in an automobile engine, a pulley in an electrical system, a pulley in various industrial machines, a gear, or the like is attached to the outer periphery of the outer ring 3 and used.

  This double-row rolling bearing 1 with an IC tag includes an inner ring 2, an outer ring 3, and a double-row rolling element 4 interposed between the double-row rolling surfaces 6 and 7 provided on the inner and outer rings 2 and 3. Prepare. The inner ring 2 is a fixed side wheel and the outer ring 3 is a rotating side wheel. The rolling element 4 is made of a ball and is held by a cage 5 for each row. Both ends of the bearing space between the inner and outer rings 2 and 3 are sealed with seals 8. The seal 8 is a contact seal and is attached to a seal groove formed on the inner peripheral surface of the outer ring 3, and the tip on the inner diameter side is in sliding contact with the outer peripheral surface of the inner ring 2. The cage 5 is a comb-shaped member composed of a ring portion 5a and a plurality of column portions 5b protruding from a plurality of locations in the circumferential direction, and a space between the adjacent column portions 5b serves as a pocket for holding the rolling elements 4.

In the inner ring 2 that is a fixed side wheel, the inner ring portions 2A and 2A of both rows face the front, and the circumferential surface 2a between the rolling surfaces 7 and 7 in both rows is more pitch circle than the circumferential surface 2b on the back side. It is in a position far from the diameter position PCD. In the case of the inner ring 2, the peripheral surface 2 a between the rolling surfaces 7 and 7 has a smaller diameter than the peripheral surfaces 2 b on both sides, so that it is far from the pitch circle diameter position PCD. An IC tag 9 is attached to the center of the circumferential surface 2a between the rolling surfaces 7 and 7 in the width direction. The IC tag 9 may be attached to the peripheral surface 2a by being attached to the surface thereof, or may be attached in an embedded state by providing a concave portion on the peripheral surface 2a.
In addition, in a bearing having a contact angle such as an angular contact ball bearing, the distinction between the front and the back is determined on the outer ring 3 side, and therefore the angular contact ball bearing of this embodiment is a back-to-back bearing.

The IC tag 9 is capable of non-contact communication. For example, an RFID tag is used. The IC tag 9 will be specifically described with reference to FIGS. The IC tag 9 can record and read information without contact or cannot be overwritten. The IC tag 9 includes an IC chip (integrated circuit chip) 25 and an antenna 26. The IC chip 25 and the antenna 26 are integrally surrounded by, for example, a resin (not shown).
Reading and writing of information with respect to the IC tag 9 is performed by the tag communicator 20. If the IC tag 1 is of a type capable of both reading and writing as the tag communicator 20, an IC tag reader / writer is used. If the IC tag 9 is a read-only type, an IC without a writing function is used. A tag reader is used. The tag communication device 20 has an antenna 21 that faces the IC tag 9. The tag communication device 20 may be connected to an appropriate information processing device 15 such as a computer, or may be a terminal having a communication function or an information processing function.

There are various types, shapes, and sizes of IC tags. In addition to strips and plates, there are, for example, squares and spheres having a size of less than 1 mm. There is also an IC tag that is formed directly on an object by printing or the like. Although there are various storage capacities, they may be appropriately selected according to the use and the size and type of the object to be attached.
As the IC tag 9, for example, an RFID tag using RFID (Radio Frequency Identification) technology can be used. There are RFID-type IC tags that use electrostatic coupling, electromagnetic coupling, electromagnetic induction, microwave, light, or the like as a transmission method, and any of these types may be used. For example, an electromagnetic induction type or a microwave type is used.

  FIG. 3 shows a specific circuit example of the IC tag 9. The IC chip 25 of the IC tag 1 has a central processing unit (CPU) 27, a memory 28, a transmission / reception circuit 29, and a power supply circuit 30, and the power supply circuit 30 obtains power from an antenna 26. . As the memory 28, a memory that does not require a power source is used.

  According to the double-row rolling bearing 1 with an IC tag having this configuration, since the non-contact communication type IC tag 9 is attached, the identification information, manufacturing information, etc. of the bearing 1 can be recorded to check the information about the bearing in detail. Easy to do. The identification information is information such as a lot number, a production number, a production date, and a production location. The manufacturing information includes the specifications of the bearing 1, the results of various inspections, and other processes such as forging, turning, heat treatment, and grinding of the inner and outer rings 2, 3 and the rolling elements 4 that are each component. Conditions, measurement results, etc. Depending on the storage capacity of the IC tag 9, only the identification information may be stored.

In this embodiment, since the mounting position of the IC tag 9 is the inner ring 2 which is a fixed side wheel, unlike the case where the IC tag 9 is mounted on the rotating side wheel, it is possible to prevent the rotation balance from being lost due to the weight of the IC tag 9. Although the IC tag 9 is small and light, it is necessary to avoid unevenness of weight as much as possible in a rolling bearing.
Further, since the mounting position of the IC tag 9 is the peripheral surface 2a between the rolling surfaces 7 and 7 in both rows, the IC tag 9 is unlikely to become an obstacle when the bearing 1 is assembled. In particular, when the cage 5 is assembled, interference with the cage 5 is avoided. When the cage 5 is of a comb shape as shown in the drawing and the ring portion 5a is attached so as to face the outside of the bearing, the IC tag 9 on the peripheral surface 2a between the rolling surfaces 7 and 7 is used. Is less likely to cause interference.

The double-row rolling bearing 1 in this embodiment is an inner ball rotating angular ball bearing, and the circumferential surface 2a between the rolling surfaces 7 and 7 of the inner ring 2 has a small diameter. Therefore, an IC tag 9 is provided on the circumferential surface 2a. By attaching, the IC tag 9 becomes more difficult to interfere with the cage 5.
Further, when the inner ring is a front-to-front double row angular contact ball bearing, the peripheral surface 2a is a portion where the bearing load hardly acts due to the contact angle. Therefore, when the IC tag 9 is attached to the peripheral surface 2a, the IC tag 9 is not affected by the bearing load, which may cause the IC tag 9 to fail during long-term use, or the IC tag 9 may be attached. Uncertainty is avoided. Even if the IC tag 9 is embedded in the portion of the peripheral surface 2a by providing a mounting recess (not shown), the problem of insufficient strength due to the formation of the recess does not occur.

  Further, when the IC tag 9 is attached to the inner ring 2 as in this embodiment, for example, by attaching the IC tag 9 after the heat treatment and polishing of the inner ring 2, manufacturing information about the inner ring 2 before the assembly of the bearing is obtained. It is also possible to record on the IC tag 9 in the inspection process of the inner ring 2 or the like.

  In addition, although the said embodiment demonstrated the case where it applied to the angular ball bearing, this invention is applicable to a double row rolling bearing generally. For example, the present invention can be applied to a double-row deep groove ball bearing, a double-row cylindrical roller bearing, a double-row tapered roller bearing, and can also be applied to a multi-row rolling bearing having three or more rows. The present invention can also be applied to an inner ring rotary type double row rolling bearing.

  FIG. 4 shows an embodiment applied to an outer ring rotation type double row deep groove ball bearing. The double-row rolling bearing 1A with an IC tag in this example is the same as the embodiment of FIG. 1 except that it is in the form of a deep groove ball bearing.

It is sectional drawing of the double row rolling bearing with an IC tag concerning 1st Embodiment of this invention. It is explanatory drawing which shows the relationship between the IC tag and a tag communication device. It is a circuit block diagram of the IC tag. It is sectional drawing of the double row rolling bearing with an IC tag concerning other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Double row rolling bearing 2 with an IC tag 2 ... Inner ring 2a, 2b ... Circumferential surface 2A ... Inner ring part 3 ... Outer ring 4 ... Rolling element 5 ... Retainer 5a ... Ring part 5b ... Column part 6 ... Rolling surface 7 of outer ring Rolling surface 8 of inner ring ... Seal 9 ... IC tag PCD ... Pitch circle diameter position

Claims (4)

  In a double row rolling bearing in which rolling elements are interposed between an inner ring and an outer ring in a double row, a non-contact communication type IC is provided on a peripheral surface between the rolling surfaces of both rows in the fixed side wheel of the inner ring and the outer ring. A double row rolling bearing with an IC tag, characterized by having a tag attached.   2. The double row rolling bearing with an IC tag according to claim 1, wherein the fixed side wheel is an inner ring.   3. The double-row rolling ball bearing according to claim 1, wherein the double-row rolling ball bearing is a double-row angular contact ball bearing, and the fixed-side wheels of the inner ring and the outer ring have portions in both rows facing the front, A double-row rolling bearing with an IC tag in which the peripheral surface between the surfaces is located farther from the circumferential surface on the back side with respect to the pitch circle diameter position, and the IC tag is attached to the peripheral surface at the far position. In any 1 item | term of Claim 1 thru | or 3, It has a pair of holder | retainer which hold | maintains a rolling element for every row | line | column, These holder | retainers are comb type | molds which consist of a ring part and a some pillar part, A double row rolling bearing with an IC tag in which the ring portion is located outside the bearing width direction.

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