JP2005299689A - Rolling bearing unit - Google Patents

Abstract

Provided is a rolling bearing unit capable of preventing the rolling bearing from being contaminated by an adhesive applied to a joining region when the rolling bearing is joined to an attachment object.
A rolling bearing unit that supports an attachment object in a relatively rotatable manner by applying an adhesive to a joining region F1 between various attachment objects 14 and the rolling bearing 2, and at least one of the rolling bearings. A concave groove 14a extending along the circumferential direction of the attachment object is formed at one end L1 of the attachment region of the attachment object facing the end surface position E1, and the rolling bearing is joined to the attachment object. At this time, all of the adhesive leaking from the joining region is collected in the concave groove.
[Selection] Figure 1

Description

  The present invention relates to a rolling bearing unit that supports various attachment objects so as to be relatively rotatable, and in particular, when a rolling bearing is joined to an attachment object, the rolling bearing is contaminated by an adhesive applied to a joining region. The present invention relates to a rolling bearing unit that can be prevented.

Conventionally, a rolling bearing that supports various attachment objects (for example, a bush, a shaft, a housing, etc.) while supporting a load so as to be relatively rotatable is known.For example, the bush and the shaft are joined to the inner ring of the rolling bearing, for example, The housing is joined to the outer ring.
In this case, as a method of joining the mounting object to the rolling bearing, for example, an adhesive is applied to the joint region between the bush and the shaft and the inner ring or the joint region between the housing and the outer ring and bonded to each other. Thus, the attachment object is joined to the rolling bearing (see, for example, Patent Document 1). In addition, a method is also known in which a concave groove is formed in a joint region of a bush, a shaft, or a housing, and an adhesive is filled in the concave groove to join an object to be mounted to a rolling bearing.

However, in the conventional joining method, when joining the mounting object to the rolling bearing, the extra adhesive out of the adhesive applied to the joining region does not fit in the joining region or the recessed groove (for example, It may leak to the end face of the rolling bearing and contaminate the rolling bearing. For example, when the inner ring of a rolling bearing is joined to a bush or a shaft, the inner ring and the vicinity thereof may be contaminated by an adhesive that leaks to the outside from within the joining region or the groove. In addition, for example, when the outer ring of the rolling bearing is joined to the housing, the outer ring and the vicinity thereof may be contaminated by the adhesive leaked to the outside from within the joining region or the groove.
When the rolling bearing is contaminated with the adhesive as described above, the rolling bearing may not be able to rotate smoothly and stably depending on the amount and range of the leaked adhesive.
Japanese Patent Laid-Open No. 2004-19864

  The present invention has been made to solve such problems, and its purpose is to prevent the rolling bearing from being contaminated by the adhesive applied to the joining area when the rolling bearing is joined to the mounting object. An object of the present invention is to provide a rolling bearing unit that can be used.

In order to achieve such an object, the present invention is a rolling bearing unit that supports an attachment object in a relatively rotatable manner by applying an adhesive to a joining region between various attachment objects and the rolling bearing. A groove extending in the circumferential direction of the mounting object is formed at least at one end of the joining region of the mounting object facing the position of one end surface of the rolling bearing.
According to this structure, all the adhesive agent leaked from the joining region when joining the rolling bearing to the attachment object is collected in the concave groove.
In the present invention, the concave groove is formed to extend along the circumferential direction of the attachment object at the other end portion of the attachment region of the attachment object facing the position of the other end surface of the rolling bearing. In this case, one or a plurality of concave grooves are formed at a predetermined interval in the joining region of the attachment object. Moreover, the concave groove is formed continuously or intermittently along the circumferential direction of the attachment object. Furthermore, the joining area of the attachment object is positioned with a predetermined height difference with respect to the other area, and the concave groove is formed at the boundary between the joining area and the other area.
In the present invention, the rolling bearing includes an inner ring and an outer ring that rotate relative to each other, and a plurality of rolling elements that are arranged to freely roll between the inner and outer rings, and the mounting object is an inner ring of the rolling bearing. And / or joined to the outer ring.

  According to the rolling bearing unit of the present invention, the concave groove extending along the circumferential direction of the mounting object is formed at least at one end of the joining region of the mounting object facing the position of the one end surface of the rolling bearing. Since the adhesive leaked from the joining area when the rolling bearing is joined to the attachment object is all collected in the concave groove, it is possible to prevent the rolling bearing from being contaminated by the adhesive.

Hereinafter, a rolling bearing unit according to an embodiment of the present invention will be described with reference to the accompanying drawings.
As the rolling bearing, for example, a radial bearing or a thrust bearing such as a single-row or double-row ball bearing or a roller bearing can be assumed. In the following description, a single-row ball bearing is illustrated as an example. explain.

  1A to 1D show the configuration of a rolling bearing unit according to the first embodiment of the present invention. In the rolling bearing unit according to the present embodiment, the rolling bearing 2 includes an inner ring 4 and an outer ring 6 that are rotatably arranged relative to each other, and a plurality of rolling elements 8 that are arranged to freely roll between the inner and outer rings. A cage 10 is provided for holding the rolling elements 8 in a freely rollable manner, and a sealing plate (for example, a seal or a shield) 12 is attached between the inner and outer rings. In the drawing, a non-contact type sealing plate 12 is shown as an example of the sealing plate 12, and the tip thereof is maintained in a non-contact state with respect to the inner ring 4.

  When a rolling bearing unit is configured by joining such a rolling bearing 2 and various mounting objects, an adhesive (not shown) applied to a bonding area between the mounting object and the rolling bearing 2 leaks and rolls. In order to prevent the bearing 2 from being contaminated, the rolling bearing unit of the present embodiment includes at least one end portion of the joint area of the mounting object facing the position of the one end surface of the rolling bearing. A concave groove extending in the direction is formed.

FIG. 1A illustrates a case where a bush 14 is applied as an attachment object, and the bush 14 and the inner ring 4 of the rolling bearing 2 are joined to form a rolling bearing unit.
In this example, a part of the bush 14 (joining region F1) is joined to the inner ring 4. At the time of joining, the other region (non-joining region F2) is the position of one end surface of the rolling bearing 2. The state of protruding outward from E1 is maintained. In addition, about the dimension, material, etc. of the rolling bearing 2 and the bush 14, since it sets arbitrarily according to the intended purpose and usage environment of a rolling bearing unit, it does not specifically limit.

  As a joining method, for example, the inner ring 4 is joined along the joining region F <b> 1 of the bush 14 while sliding the rolling bearing 2 in the arrow direction S with respect to the bush 14. In the joined state, the one end surface position E1 of the rolling bearing 2 is positioned at one end L1 of the joining region F1 of the bush 14. In this case, the one end L1 is located at the boundary between the joining region F1 and the non-joining region F2, and the concave groove 14a extends continuously along the circumferential direction of the one end L1 (the circumferential direction of the bush 14). It is formed by extension (see FIG. 1 (d)).

  According to such a rolling bearing unit, when the one end surface position E1 of the rolling bearing 2 is positioned at one end L1 of the joining region F1 of the bush 14, excess adhesive leaks out of the adhesive applied to the joining region F1. Even in this case, all of the excess adhesive is recovered in the concave groove 14a formed in the one end L1. As a result, it is possible to prevent the rolling bearing 2 from being contaminated by the adhesive, and it is also possible to prevent the adhesive from spreading beyond the one end L to the non-joined region F2 and contaminating the bush 14.

  Further, since all of the excess adhesive is collected in the concave groove 14a, for example, after the rolling bearing 2 and the bush 14 are joined, the adhesive in the concave groove 14a can be easily wiped off. Furthermore, for example, when an ultraviolet curable adhesive is used, all the leaked adhesive can be reliably cured by simply irradiating ultraviolet rays toward the adhesive collected in the groove 14a. It is easy to irradiate ultraviolet rays.

In the rolling bearing unit according to the first embodiment, in addition to the concave groove 14a, it is also preferable to form one or a plurality of concave grooves in the joining region F1 of the bush 14 at a predetermined interval.
For example, as shown in FIG. 1B, when the concave grooves 14a and 14b are formed at symmetrical positions (K1 = K2) with respect to the bush 14, the joining direction (arrow R) of the rolling bearing 2 with respect to the bush 14 is not limited. Even if the rolling bearing 2 is joined to the bush 14 from any direction, the adhesive leaked from the joining region F1 is all collected in the concave groove 14a or 14b. Further, since the adhesive can be retained and retained in the plurality of concave grooves 14a and 14b in the joining region F1, the adhesive strength can be improved by the adhesive in the concave grooves 14a and 14b. The rolling bearing 2 and the bush 14 can be firmly joined.

Further, for example, as shown in FIG. 1 (c), in addition to the concave grooves 14a and 14b, a concave groove 14c is further formed in the joint region F1 of the bush 14, thereby forming the concave grooves 14b and 14c in the joint region F1. Therefore, the adhesive strength can be further improved, and as a result, the rolling bearing 2 and the bush 14 can be joined more firmly.
In this case, the concave groove 14a of the one end portion L1 is formed so as to continuously extend along the circumferential direction of the one end portion L1 (the circumferential direction of the bush 14) in order to reliably accommodate all leaked adhesive. However, the concave grooves 14b and 14c in the joining region F1 may be formed intermittently along the circumferential direction as shown in FIG. 3 (e), for example. You may form intermittently along the direction (inclination direction) which cross | intersects a direction. The number and shape of the concave grooves formed in the joining region F1 are not particularly limited because they are arbitrarily set according to the purpose and environment of use of the rolling bearing unit.

FIGS. 2A to 2D show the configuration of a rolling bearing unit according to the second embodiment of the present invention, and a bush 14 larger than the rolling bearing 2 is applied as an attachment object. Has been. In addition, since the structure of the rolling bearing 2 is the same as 1st Embodiment mentioned above, the description is abbreviate | omitted.
In the present embodiment, a part of the bush 14 (joining region F1) is joined to the inner ring 4. At the time of joining, the other region (non-joining regions F2 on both sides of the joining region) The rolling bearing 2 is maintained in a state of protruding outward from the one end surface position E1 and the other end surface position E2. In addition, about the dimension, material, etc. of the rolling bearing 2 and the bush 14, since it sets arbitrarily according to the intended purpose and usage environment of a rolling bearing unit, it does not specifically limit.

  As a joining method, for example, the inner ring 4 is joined along the joining region F <b> 1 of the bush 14 while sliding the rolling bearing 2 in the arrow direction S with respect to the bush 14. In the joined state, the one end face position E1 of the rolling bearing 2 is positioned at one end L1 of the joining area F1 of the bush 14, while the other end face position E2 of the rolling bearing 2 is located in the joining area F1 of the bush 14. It is positioned at the other end L2. In this case, the one end L1 and the other end L2 are located at the boundary between the joining region F1 and the non-joining region F2, respectively, and the concave groove 14a is formed in the circumferential direction of the one end L1 (the circumferential direction of the bush 14). It extends continuously along the line (see FIG. 1D).

  According to such a rolling bearing unit, when the one end surface position E1 of the rolling bearing 2 is positioned at one end L1 of the joining region F1 of the bush 14, excess adhesive leaks out of the adhesive applied to the joining region F1. Even in this case, all of the excess adhesive is recovered in the concave groove 14a formed in the one end L1. As a result, it is possible to prevent the rolling bearing 2 from being contaminated by the adhesive, and it is also possible to prevent the adhesive from spreading beyond the one end L to the non-joined region F2 and contaminating the bush 14. Since other functions and effects are the same as those of the first embodiment described above, description thereof is omitted.

In the rolling bearing unit according to the second embodiment, in addition to the concave groove 14a, the concave groove 14b is formed in the other end portion L2 of the joint region F1 of the bush 14 facing the other end surface position E2 of the rolling bearing 2. It may be formed extending along the circumferential direction of the bush 14.
For example, as shown in FIG. 2B, if the concave grooves 14a and 14d are formed in the one end L1 and the other end L2 of the bush 14, respectively, the joining direction (arrow R) of the rolling bearing 2 with respect to the bush 14 is not limited. Even if the rolling bearing 2 is joined to the bush 14 from any direction, the adhesive leaked from the joining region F1 is all collected in the concave groove 14a or 14d of the one end L1 or the other end L2. As a result, it is possible to prevent the rolling bearing 2 from being contaminated by the adhesive, and it is also possible to prevent the adhesive from spreading beyond the one end L1 or the other end L2 to the non-joined region F2 and contaminating the bush 14.

Furthermore, for example, as shown in FIG. 2C, it is also preferable to form one or a plurality of concave grooves at a predetermined interval in the joint region F1 of the bush 14.
In the figure, an example in which two concave grooves 14b and 14c are formed in the joining region F1 is shown, but according to this, the adhesive remains in the concave grooves 14b and 14c in the joining region F1. Therefore, the adhesive strength in the concave grooves 14b and 14c can be improved, and as a result, the rolling bearing 2 and the bush 14 can be joined firmly. In this case, the four concave grooves 14a, 14b, 14c, 14d are formed symmetrically with respect to the bush 14 (K1 = K2, M1 = M2), whereby the concave grooves 14a, 14b, Since the adhesive can be uniformly retained in 14c and 14d, the adhesive strength in the grooves 14a, 14b, 14c and 14d can be made uniform, and as a result, the rolling bearing 2 and The bush 14 can be stably and firmly joined.

  In this case, the concave grooves 14a and 14d of the one end L1 and the other end L2 are arranged in the circumferential direction of the one end L1 and the other end L2 (the circumferential direction of the bush 14) in order to securely store all the leaked adhesive. However, the concave grooves 14b and 14c in the joining region F1 are formed intermittently along the circumferential direction as shown in FIG. 3 (e), for example. Alternatively, it may be formed intermittently along a direction intersecting the circumferential direction (inclination direction). In addition, since the number of the recessed grooves formed in the joining area | region F1 is arbitrarily set according to the intended purpose and usage environment of a rolling bearing unit, it does not specifically limit.

FIG. 3A shows a configuration of a rolling bearing unit according to a third embodiment of the present invention. As an attachment object, a shaft 16 is applied, and the shaft 16 and the rolling bearing 2 are combined. A rolling bearing unit is configured by joining the inner ring 4. In addition, since the structure of the rolling bearing 2 is the same as 1st Embodiment mentioned above, the description is abbreviate | omitted.
In the present embodiment, the number, position, or shape of the concave grooves 14a, 14b, 14c, 14d formed in the bush 14 (see FIG. 2) of the second embodiment described above can be applied. The description is omitted. In the figure, only three concave grooves 14a, 14b, and 14d are shown as an example.

  According to such a rolling bearing unit, for example, by forming the concave grooves 14a and 14d in the one end L1 and the other end L2 of the joining region F1 of the shaft 16, the joining direction of the rolling bearing 2 with respect to the shaft 16 (arrow) R) is not limited, and any adhesive leaking from the joining region F1 is collected in the concave groove 14a or 14d of the one end L1 or the other end L2 even if the rolling bearing 2 is joined to the shaft 16 from any direction. Is done. As a result, it is possible to prevent the rolling bearing 2 from being contaminated by the adhesive, and it is also possible to prevent the adhesive from spreading beyond the one end L1 or the other end L2 to the non-joined region F2 and contaminating the shaft 16. Since other functions and effects are the same as those of the first embodiment described above, description thereof is omitted.

  Moreover, although the example which formed one ditch | groove 14b in the joining area | region F1 was shown in the figure, according to this, since an adhesive agent can be retained and retained in the ditch | groove 14b in the joining area | region F1, it is. The adhesive strength in the concave groove 14b can be improved, and as a result, the rolling bearing 2 and the shaft 16 can be firmly joined.

FIG. 3B shows a configuration of a rolling bearing unit according to the fourth embodiment of the present invention. As an attachment object, a housing 18 is applied, and the housing 18 and the rolling bearing 2 are arranged. A rolling bearing unit is configured by joining the outer ring 6. In addition, since the structure of the rolling bearing 2 is the same as 1st Embodiment mentioned above, the description is abbreviate | omitted.
In the present embodiment, the number, position, or shape of the concave grooves 14a, 14b, 14c, 14d formed in the bush 14 (see FIG. 2) of the second embodiment described above can be applied. The description is omitted. In the figure, only three concave grooves 14a, 14b, and 14d are shown as an example.

  According to such a rolling bearing unit, since the concave grooves 14a and 14d are formed in the one end L1 and the other end L2 of the joining region F1 of the housing 18, the joining direction of the rolling bearing 2 with respect to the housing 18 (arrow R). ) Is not limited, the adhesive leaked from the joining region F1 is collected in the concave groove 14a or 14d of the one end L1 or the other end L2 even if the rolling bearing 2 is joined to the housing 18 from any direction. The As a result, it is possible to prevent the rolling bearing 2 from being contaminated by the adhesive, and it is also possible to prevent the adhesive from spreading beyond the one end L1 or the other end L2 to the non-joined region F2 and contaminating the housing 18.

  Moreover, although the example which formed one ditch | groove 14b in the joining area | region F1 was shown in the figure, according to this, since an adhesive agent can be retained and retained in the ditch | groove 14b in the joining area | region F1, it is. The adhesive strength in the concave groove 14b can be improved, and as a result, the rolling bearing 2 and the housing 18 can be firmly joined. Since other functions and effects are the same as those of the first embodiment described above, description thereof is omitted.

FIG. 3 (c) shows the configuration of a rolling bearing unit according to the fifth embodiment of the present invention. As an attachment object, a bush 14, a shaft 16 or a housing 18 is assumed. The joining region F1 of these attachment objects is positioned with a predetermined height difference G with respect to another region (non-joining region F2), and a concave groove (a concave portion of one end L1 or the other end L2 of the joining region F1). The groove 14a or 14d) is formed at the boundary between the bonding region F1 and the non-bonding region F2.
In this case, the magnitude of the height difference G is not particularly limited because it is arbitrarily set according to the purpose of use and the usage environment of the rolling bearing unit.

  According to such a configuration, all of the adhesive leaking from the joining region F1 is collected so as to flow down into the concave groove 14a or 14d of the one end L1 or the other end L2. In this case, since the adhesive accommodated in the concave grooves 14a and 14d accumulates at a position away from the rolling bearing 2, the degree of contamination and the amount of contamination on the rolling bearing 2 can be greatly reduced. Since other functions and effects are the same as those of the first embodiment described above, description thereof is omitted.

In the first to fifth embodiments described above, the shape of the concave grooves 14a, 14b, 14c, and 14d of the attachment object is not particularly described, but the adhesive leaked from the joining region F1 is surely obtained. Any shape can be applied as long as it can be accommodated. For example, various shapes such as a triangular cross section, a circular arc shape, a rectangular cross section, a rounded triangular cross section, a U-shaped cross section, and a trapezoidal cross section can be applied in order from the top of FIG.
Further, the size and depth of the concave grooves 14a, 14b, 14c, and 14d are not particularly limited because they are arbitrarily set depending on the purpose and environment of use of the rolling bearing unit.
Furthermore, in the treatment process for forming the concave groove in the attachment object, there is an advantage that the escape of the gas becomes better when baking (heat treatment) due to the concave groove.

It is sectional drawing which shows the structure of the rolling bearing unit which concerns on the 1st Embodiment of this invention, Comprising: (a) is a figure which shows the structural example by which the ditch | groove was formed in the one end part of the joining area | region of an attachment target object. (B) is a figure which shows the structural example in which the ditch | groove was formed in the symmetrical position with respect to the attachment target object, (c) is the structure by which the several ditch | groove was formed in the joining area | region of the attachment target object. The figure which shows an example, (d) is a perspective view of an attachment target object. It is sectional drawing which shows the structure of the rolling bearing unit which concerns on the 2nd Embodiment of this invention, Comprising: (a) is a figure which shows the structural example by which the ditch | groove was formed in the one end part of the joining area | region of an attachment target object. (B) is a figure which shows the structural example in which the ditch | groove was formed in the one end part and other end part of the joining area | region of an attachment target object, (c) is a some recessed groove in the joining area | region of an attachment target object. The figure which shows the structural example in which was formed. (a) is sectional drawing which shows the structure of the rolling bearing unit which concerns on the 3rd Embodiment of this invention, (b) is a cross section which shows the structure of the rolling bearing unit which concerns on the 4th Embodiment of this invention. (C) is sectional drawing which shows the structure of the rolling bearing unit based on the 5th Embodiment of this invention, (d) is a figure which shows the kind of shape of a ditch | groove, (e) is a ditch | groove The partial expanded view of the attachment target object which shows the formation state and formation direction of.

Explanation of symbols

2 Rolling bearing 4 Inner ring 6 Outer ring 8 Rolling element 10 Cage 12 Sealing plate 14 Bush (attachment object)
14a, 14b, 14c, 14d Groove 16 shaft (object to be mounted)
18 Housing (object to be mounted)
E1 One end surface position of the rolling bearing E2 Other end surface position of the rolling bearing F1 Joining region F2 Non-joining region L1 One end portion L2 of the joining region Other end portion of the joining region

Claims (7)

A rolling bearing unit that supports the mounting object in a relatively rotatable manner by applying an adhesive to the joint area between the various mounting objects and the rolling bearing,
A concave groove extending along the circumferential direction of the mounting object is formed at one end of the joining area of the mounting object facing at least one end surface position of the rolling bearing,
A rolling bearing unit characterized in that all of the adhesive leaked from the joining area when the rolling bearing is joined to the attachment object is collected in the concave groove.   The concave groove is formed to extend along the circumferential direction of the mounting object at the other end of the joining region of the mounting object facing the position of the other end surface of the rolling bearing. The rolling bearing unit described.   3. The rolling bearing unit according to claim 1, wherein one or a plurality of the concave grooves are formed at a predetermined interval in a joining region of the attachment object.   The rolling bearing unit according to claim 1, wherein the groove is formed continuously or intermittently along the circumferential direction of the attachment target.   The bonding area of the attachment object is positioned with a predetermined height difference with respect to the other area, and the concave groove is formed at a boundary between the bonding area and the other area. Rolling bearing unit in any one of -4.   The rolling bearing includes an inner ring and an outer ring that rotate relative to each other, and a plurality of rolling elements that are arranged to freely roll between the inner and outer rings, and the mounting object is joined to the inner ring of the rolling bearing. The rolling bearing unit according to any one of claims 1 to 5, wherein The rolling bearing includes an inner ring and an outer ring that rotate relative to each other, and a plurality of rolling elements that are movably arranged between the inner and outer rings, and the mounting object is joined to the outer ring of the rolling bearing. The rolling bearing unit according to any one of claims 1 to 5, wherein

Images