JP6237262B2 - Dimensional measuring jig for thrust roller bearing and dimension measuring method of thrust roller bearing - Google Patents

Description

  The present invention relates to a dimension measuring jig for a thrust roller bearing and a dimension measuring method for a thrust roller bearing. The present invention relates to a dimension measuring jig for a thrust roller bearing and a dimension measuring method for a thrust roller bearing that are preferably used for measuring the dimension of a roller bearing that supports a rotating shaft of a table of a multi-axis machine, for example.

  Conventionally, as a dimension measuring jig of a roller bearing, there is one described in JP 2009-229190 A (Patent Document 1).

  This dimension measuring device measures a clearance between pockets of a cage of a tapered roller bearing. This dimension measuring device includes a supporting means, a measuring jig, and an axial position measuring means. The support means supports a cage assembly comprising a cage and a plurality of tapered rollers.

  The measuring jig is arranged on the inner periphery of the tapered roller assembly supported by the supporting means. The measurement jig has a tapered outer peripheral surface. The tapered outer peripheral surface is moved in the axial direction relative to the tapered roller assembly until the tapered outer peripheral surface contacts the conical rolling surface of the tapered roller.

  This dimension measuring apparatus measures the radial position of the tapered roller corresponding to the axial position of the measuring jig on a one-to-one basis by measuring the axial position of the measuring jig with the axial position measuring means. The size of the gap between the pockets of the cage that is specified and corresponds to the radial position of the tapered roller on a one-to-one basis is measured.

JP 2009-229190 A (FIG. 3)

  The present inventor has found the following problems regarding the thrust roller bearing. The following description has been prepared by the present inventor in order to easily explain the problem of the present invention, and the following description cannot be used as a conventional example for rejecting the present invention.

  The multi-axis processing machine includes an arm and a turning table, and the arm has a large number of joints and can freely move. The arm has a cutting part such as a drill. The swivel table is configured to place a workpiece. In the multi-axis machining apparatus, the direction of the workpiece can be changed by rotating the table as appropriate. In the multi-axis machining apparatus, the arm is freely moved and the table is also swiveled as appropriate, and the workpiece on the swivel table is cut into a desired shape by the cutting portion of the arm.

  In a multi-axis machine, the swivel table must support the workpiece, and the swivel table is also subjected to complex loads that occur with the movement of the arm. In such a situation, the turning table is required to turn freely without shaking. Therefore, a roller bearing having a large capacity is used as the thrust roller bearing for supporting the rotating shaft of the turning table, and the roller bearing requires high dimensional accuracy.

  FIG. 2 is a schematic diagram showing a basic configuration of a thrust cylindrical roller bearing for supporting the rotating shaft of the turning table.

  This thrust cylindrical roller bearing (hereinafter simply referred to as a roller bearing) is used in a state in which the rotating shaft of the swivel table is parallel to the vertical direction. This roller bearing includes a first bearing ring 50, a second bearing ring 51, a plurality of cylindrical rollers 52, and a cage 53. In use, the second bearing ring 51 is more than the first bearing ring 50. Is also positioned below the vertical direction indicated by arrow C in FIG. The cage 53 has an annular guide portion 55. The cage 53 is positioned by bringing a guide surface 56, which is a flat portion of the guide portion 55, into contact with the upper surface of the second track ring 51.

  FIG. 3 is a schematic view showing the structure of the cage 53. In FIG. 3, the side surface 62 of the pocket 60 of the cage 53 is shown on the left side. As shown in FIG. 3, the side surface 62 of the pocket 60 has an arc shape. By holding the rolling surface of the cylindrical roller 52 (see FIG. 2) so as to be held by the side surface 62 of the arc-shaped pocket 60, the relative position of the cylindrical roller 52 with respect to the pocket 60 is positioned.

  This cylindrical roller bearing is required to have high accuracy in the distance between the center P ′ of the pocket 60 indicated by the arrow D in FIG. 3 and the guide surface 56 of the guide portion 55 of the cage 53. This is because, with reference to FIG. 2, the cage 53 is positioned with respect to the second race 51 and each cylindrical roller 52 is sandwiched between the first race 50 and the second race 51. . Therefore, if the distance indicated by D is not a predetermined dimension, the center of the cylindrical roller 52 and the center P ′ of the pocket 60 do not coincide with each other, and each cylindrical roller 52 receives an unexpected force from the cage 53. This is because the rolling performance of each cylindrical roller 52 is deteriorated.

  In such a background, the accuracy of the distance between the center position of the pocket 60 and the guide surface 56 of the guide portion 55 is important. In the first place, the existing roller bearing including the dimension measuring jig of the conventional roller bearing is included. In the dimension measuring jig, the distance indicated by D cannot be measured.

  When the distance indicated by D is measured by a distance measuring device such as a caliper, the reference surface mounting protrusion 96 of the retainer 53 has a processing machine 70 as shown in FIG. Therefore, measurement is difficult because the space is narrow. Therefore, in order to measure the distance indicated by D, the holder 53 must be lowered from the processing machine 70. Therefore, in order to manufacture the cage, it is necessary to repeat the removal and installation of the cage with respect to the processing machine, and a large man-hour is required to measure the distance indicated by D above.

  Therefore, the object of the present invention is to measure the dimensions of a thrust roller bearing that can easily measure the distance between the center of the pocket and the guide surface of the guide portion of the cage, while the cage is still placed on the reference surface of the processing machine. An object of the present invention is to provide a dimension measuring method for a jig and a thrust roller bearing.

In order to solve the above-mentioned problem, the dimension measuring jig for thrust roller bearing of the present invention is:
A main body having a conical outer peripheral surface;
An extension portion extending from the main body portion to a region located on the opposite side of the axial outer circumferential surface side with respect to the axially small diameter end of the outer circumferential surface of the cone,
The extension portion is opposed to the extension line of the central axis of the outer circumferential surface of the cone at a region located on the opposite side, with a radial interval between the outer circumferential surface of the cone and a straight line substantially parallel to the extension line. It has the flat part containing.

  The present invention relates to a thrust roller bearing retainer (hereinafter referred to as a pocket having a circular arc-shaped side surface in a circumferential direction and a guide portion having a flat portion in contact with the upper surface of a bearing ring located on the lower side in the vertical direction in use) , A dimension measuring jig for thrust roller bearings (hereinafter, simply referred to as a jig) for measuring the dimensions of the cage, and more specifically, the axial direction between the center of the pocket of the cage and the flat part of the guide part It is a jig for measuring the distance (in the axial direction of the cage).

  According to the present invention, the angle formed between the generatrix of the cone outer peripheral surface and the central axis of the cone outer peripheral surface is made larger than the angle formed between the generatrix included in the side surface of the pocket and the central axis of the pocket, and By making the maximum diameter of the cone outer peripheral surface larger than the maximum diameter of the arc of the pocket, the cone outer peripheral surface can be locked to the side surface of the pocket without any gap. Accordingly, the outer circumferential surface of the cone can be accurately positioned with respect to the center of the pocket.

  Accordingly, the main body portion is inserted into the pocket from the radially outer side of the cage with the small diameter side of the outer peripheral surface of the cone as the head, with the planar portion of the extending portion being substantially parallel to the planar portion of the cage. Sometimes, by confirming that the tip of the extension part collides with the guide part, the distance between the central axis of the outer peripheral surface of the cone of the jig and the flat part of the extension part is the center of the pocket of the cage. It can be strictly recognized that the distance is shorter than the distance between the guide portion and the flat portion.

  Further, in the state in which the flat portion of the extending portion is substantially parallel to the flat portion of the cage, the jig is in the above-described posture, and the main body portion starts from the small-diameter side of the outer circumferential surface of the cone, outward in the radial direction. The central part of the cone outer peripheral surface and the flat part of the extension part are confirmed by confirming that the flat part of the extension part and the flat part of the guide part overlap in the axial direction of the cage when inserted into the pocket from It can be strictly recognized that the distance to the portion is longer than the distance between the center of the cage pocket and the flat portion of the guide portion.

  Therefore, by preparing at least two jigs having different distances between the central axis of the outer peripheral surface of the cone and the flat portion of the extending portion, the distance between the center of the cage pocket and the flat portion of the guide portion is set to a predetermined value. Precise measurement within the error range.

  Further, according to the present invention, the dimension of the jig in the radial direction (meaning the radial direction of the outer circumferential surface of the cone) can be set to the same dimension as the distance between the center of the pocket and the flat portion of the guide portion. Therefore, since the dimension of the jig can be approximately the same as the dimension of the cage in the axial direction, the jig can be easily attached to and detached from the cage even when the cage is placed on the reference surface of the processing machine. Therefore, the distance between the center of the pocket and the guide surface of the guide portion of the cage can be easily measured even when the cage is placed on the reference surface of the processing machine.

The dimension measuring method of the thrust roller bearing of the present invention is
Two thrust roller bearing dimension measuring jigs according to claim 1, wherein the radial distance between the extension of the central axis and the flat portion is different from each other. Jig preparation process to prepare,
The circumferential side surface has a circular arc-shaped pocket, and a guide portion having a flat portion in contact with the upper surface of the bearing ring located on the lower side in the vertical direction when in use, and the radially outer side of the pocket has a diameter. A cage preparing step of preparing a thrust roller bearing cage that is open in a direction;
Of the two dimension measuring jigs for thrust roller bearings, the outer circumferential surface of one of the thrust roller bearing dimension measuring jigs having a small radial distance is connected to the dimension measuring jig for one thrust roller bearing. When the planar portion of the extending portion is inserted into the pocket from the radially outer side in a state in which the planar portion of the extending portion is substantially parallel to the planar portion of the guide portion, The extension portion contacts the side surface of the guide portion of the thrust roller bearing retainer, and the cone of the other thrust roller bearing dimension measuring jig of the two thrust roller bearing dimension measuring jigs. When the outer peripheral surface is locked to the side surface of the pocket in a state where the flat portion of the extension portion of the other dimension measuring jig for thrust roller bearing is substantially parallel to the flat portion of the guide portion, Thrus Judgment is made as to whether or not the flat portion of the dimension measuring jig for roller bearings is in a dimension allowable range in which the flat portion of the guide portion of the thrust roller bearing retainer overlaps the axial direction of the thrust roller bearing retainer. And a dimension confirmation process.

  According to the present invention, in the dimension confirmation step, the extension portion of the one jig contacts the side surface of the guide portion, and the plane portion of the other jig is in contact with the plane portion of the guide portion of the cage. The distance between the center of the cage pocket and the flat part of the guide part is determined by the distance between the central axis of the conical outer peripheral surface of one jig and the flat part of the extending part. And the distance between the center axis of the outer circumferential surface of the cone of the other jig and the distance between the flat portion of the extending portion can be confirmed. Therefore, by setting the distance of the one jig as the allowable lower limit of the distance of the cage, and setting the distance of the other jig as the allowable upper limit of the distance of the cage The distance of the cage can be set to a highly accurate value with little error with respect to a predetermined value.

  According to the present invention, the dimensions for the thrust roller bearing can easily and accurately measure the distance between the center of the pocket and the guide surface of the guide portion of the cage even when the cage is placed on the reference surface of the processing machine. A measuring jig can be realized. Further, according to the present invention, the last roller bearing that can easily and accurately measure the distance between the center of the pocket and the guide surface of the guide portion of the cage even when the cage is placed on the reference surface of the processing machine. The dimension measuring method can be realized.

It is a perspective view of the dimension measuring jig for thrust roller bearings of one embodiment of the present invention. It is a schematic diagram which shows the basic composition of the thrust cylindrical roller bearing for supporting the rotating shaft of the turning table of a multi-axis processing machine. It is a schematic diagram which shows the structure of the holder | retainer of the said thrust cylindrical roller bearing.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view of a dimension measuring jig for a thrust roller bearing according to an embodiment of the present invention.

  As shown in FIG. 1, the thrust roller bearing dimension measuring jig (hereinafter simply referred to as a jig) includes a main body 1 and an extension 5. The main body 1 has a conical outer peripheral surface 11.

  As shown in FIG. 1, the extending portion 5 is a region located on the opposite side of the axial outer circumferential surface 11 side from the axially smaller end 14 of the cone outer circumferential surface 11 from the main body 1. It extends to. The extending portion 5 overlaps the radial direction of the conical outer peripheral surface 11 only in one continuous specific phase in the circumferential direction of the conical outer peripheral surface 11. In the circumferential direction of the cone outer peripheral surface 11, the extending portion 5 exists only in a part of the phase of the cone outer peripheral surface 11 in the circumferential direction.

  The extending part 5 has a flat part 18. The plane portion 18 exists in a region located on the opposite side. The plane portion 18 is opposed to the extension line 21 of the central axis P of the cone outer peripheral surface 11 with a gap in the radial direction of the cone outer peripheral surface 11. The plane portion 18 includes a straight line substantially parallel to the extension line 21. The angle formed by the center of the cone outer peripheral surface 11 and the generatrix of the cone outer peripheral surface 11 is about 1/100 [°].

  The dimension indicated by the arrow B in FIG. 1 indicates the maximum distance between the central axis P of the conical outer peripheral surface 11 of the jig and the extending portion 5. Further, the dimension indicated by the arrow E in FIG. 3 is the pocket 60 when the reference surface mounting protrusion 96 that is the flat surface portion of the cage 53 is mounted on the reference surface 71 of the processing machine 70 that is the flat surface portion. The axial distance of the cage 53 from the center P ′ to the reference plane 71 is shown.

  At this time, the dimension indicated by the arrow B in FIG. 1 is smaller than the dimension indicated by the arrow E in FIG. 3 is larger than the minimum outer diameter of the conical outer peripheral surface 11 indicated by reference numeral 37 in FIG. 1, while the conical outer peripheral surface indicated by reference numeral 38 in FIG. 11 is smaller than the maximum outer diameter. The angle formed between the generatrix of the cone outer peripheral surface 11 and the central axis P of the cone outer peripheral surface 11 is larger than the angle formed between the generatrix included in the side surface of the pocket 60 and the center axis of the pocket 60.

  Further, the dimension indicated by the arrow A in FIG. 1 indicates the distance between the extension line 21 and the flat portion 18 of the extending portion 5. 3 indicates a distance in the axial direction of the cage 53 between the center P ′ of the pocket 60 and the guide surface 56 formed of a flat portion of the guide portion 55.

  When A is a dimension equal to or smaller than D, the outer side in the radial direction of the pocket 60 of the retainer 53 is opened in the radial direction. When 18 is inserted into the pocket 60 from the radially outer side of the retainer 53 in a state substantially parallel to the flat portion of the guide portion 55, the tip 90 of the extension portion 5 is the side surface 64 of the guide portion 55 of the retainer 53. (See FIG. 3).

  On the other hand, when A is larger than D, the outer side in the radial direction of the pocket 60 of the cage 53 is opened in the radial direction, and this jig is used as a flat portion of the extension portion 5. When 18 is inserted into the pocket 60 from the radially outer side of the cage 53 in a state substantially parallel to the planar portion of the guide portion 55, the planar portion 18 of the jig is brought into contact with the planar portion of the guide portion 55 of the cage 53. The cage 53 overlaps in the axial direction. Further, when A is larger than D, any part in the axial direction of the conical outer peripheral surface 11 is locked to the arc-shaped side surface 62 of the pocket 60 of the cage 53 without any gap. . When A is larger than D, the distal end 90 of the extending portion 5 is guided by the guide portion 55 in the radial direction of the reference surface mounting protrusion 96 of the retainer 53 (the radial direction of the retainer 53). It is located on the side surface 89 (see FIG. 3) at a distance in the radial direction.

  By using this jig as described below, it is determined with high accuracy whether the dimension D of the cage 53 has a determined length.

  Specifically, first, in the jig preparing step, the two jigs, each having the dimension A, that is, the radial distance between the extension line of the central axis of the outer peripheral surface of the cone and the flat part of the extending part. Prepare two different jigs.

  Next, in the cage preparation step, the guide portion 55 having a flat surface portion that comes into contact with the upper surface of the cage 53 shown in FIG. 3, that is, the raceway ring 51 (see FIG. 2) positioned on the lower side in the vertical direction in use. And a cage 53 in which the circumferential side surface 62 has an arcuate pocket 60 and the radially outer side of the pocket 60 is opened in the radial direction.

  Next, in the dimension checking step, one jig having the smaller dimension A is arranged on the outer circumferential surface of the cone, and the flat part of the extending part of the one jig is substantially parallel to the flat part of the guide part 55. In this state, it is inserted into the pocket 60 from the radially outer side. And it is test | inspected whether the extension part of the one jig | tool contacts the side surface 64 of the guide part 55 of the holder | retainer 53. FIG. At this time, when the extension part of the jig does not contact the side face 64 of the guide part 55 of the cage 53, it is judged that the dimension D is short, and the cage is judged to be defective.

  On the other hand, when the extension part of one jig contacts the side face 64 of the guide part 55 of the cage 53, the other jig having the larger dimension A is connected to the outer circumferential surface of the cone. The flat portion of the extending portion of the tool is inserted into the pocket 60 from the radially outer side in a state of being substantially parallel to the flat portion of the guide portion. And it is test | inspected whether the extension part of the other jig | tool contacts the side surface 64 of the guide part 55 of the holder | retainer 53. FIG. At this time, the tip of the extension part of the other jig does not contact the side face 64 of the guide part 55 of the cage 53, and the plane part of the other jig is held by the plane part of the guide part 55 of the cage 53. When overlapping in the axial direction of the vessel 53, it is determined that the dimension D is within a predetermined error range with respect to the desired dimension. On the other hand, when the tip of the extension part of the other jig contacts the side face 64 of the guide part 55 of the cage 53, it is determined that the dimension D is large, and the flat part of the guide part 55 is polished or the like. The flat portion of the other jig overlaps the flat portion of the guide portion 55 of the retainer 53 in the axial direction of the retainer 53.

  In this way, the extension part of one jig contacts the side face 64 of the guide part 55 of the cage 53, and the plane part of the other jig is in contact with the plane part of the guide part 55 of the cage 53. 53, it is determined that the dimension is within the allowable range by overlapping in the axial direction, and that the dimension D of the cage 53 has a small error and a high precision with respect to the desired dimension. to decide.

  According to the above embodiment, the center P of the pocket 60 of the cage 53 is prepared by preparing a plurality of jigs having different distances between the central axis P of the outer circumferential surface 11 of the cone and the flat surface portion 18 of the extending portion 5. The distance between 'and the flat portion of the guide portion 55 can be precisely measured within a predetermined error range.

  Moreover, according to the said embodiment, the dimension of the radial direction (diameter direction of a cone outer peripheral surface) of a jig | tool shall be a dimension comparable as the distance of center P 'of the pocket 60, and the plane part of the guide part 55. FIG. Can do. Therefore, since the dimension of the jig can be approximately the same as the dimension of the cage 53 in the axial direction, the jig can be easily placed on the cage 53 even when the cage 53 is placed on the reference surface 71 of the processing machine 70. The distance between the center P ′ of the pocket 60 and the guide surface 56 of the guide portion 55 of the holder 53 can be easily measured even when the holder 53 is placed on the reference surface 71 of the processing machine 70. .

  According to the embodiment, the angle formed by the center of the cone outer peripheral surface 11 and the generatrix of the cone outer peripheral surface 11 is an angle of about 1/100 [°]. The angle formed by the center of the outer circumferential surface of the cone and the generatrix of the outer circumferential surface of the cone of the jig may be any angle other than 1/100 [°].

  In the above embodiment, the distance from the central axis of the pocket 60 of the thrust roller bearing retainer 53 for the cylindrical roller 52 to the flat portion of the guide portion 55 is measured. However, the jig of the present invention may be used to measure the distance from the center of the pocket of the thrust roller bearing cage for the tapered roller to the flat portion of the guide portion. In this case as well, the angle formed between the generatrix of the outer periphery of the cone of the jig and the central axis of the outer periphery of the cone of the jig is formed by the generatrix of the side surface of the pocket consisting of the conical surface of the pocket and the central axis of the pocket. Needless to say, the angle is larger than the angle and the conical outer peripheral surface of the jig is locked with no gap at the side surface portion of the pocket.

  Moreover, in the said embodiment, when inserting the main-body part 1 of a jig | tool in the pocket 60, the judgment part which judges whether the main-body part 1 was inserted with the correct attitude | position did not exist. However, according to the present invention, a magic or a notch is marked on both sides in the circumferential direction of the radially outer end face of the cage when the radially outer side of the pocket is opened, and the jig is cured. You may make it mark by the magic, a notch, etc. in two points | pieces which pinch | interpose on the diameter of the end surface by the side of the large diameter of the cone raceway surface of a tool main body part. Then, when these jigs are used as judgment parts, when the jig is inserted into the pocket, the cone outer peripheral surface of the jig is matched with the phase of the mark on the pocket and the phase of the mark on the jig. You may make it insert in a pocket. In this case, it is possible to reliably insert the main body of the jig into the pocket from the radially outer side in a state where the flat portion of the extending portion of the jig is substantially parallel to the flat portion of the guide portion. .

  In the present invention, for example, the difference in dimension indicated by A (see FIG. 1) in the two jigs prepared in the jig preparing step can be set to 10 [μm]. However, in the present invention, of course, the difference between the dimensions indicated by A (see FIG. 1) in the two jigs prepared in the jig preparing process may be any length other than 10 [μm]. It is.

  Further, with the jig of the present invention, the cage for measuring the distance from the center of the pocket to the guide surface of the guide portion is an annular member having an opening on the radially outer side of the pocket after the measurement by the jig. Of course, it may be occluded. Further, it goes without saying that the present invention can be used for measuring the dimensions of a cage of any industrial machine or construction machine other than a multi-axis machine. Moreover, it is needless to say that a new embodiment can be constructed by combining two or more of the configurations described in the above embodiments and modifications.

DESCRIPTION OF SYMBOLS 1 Main-body part 5 Extension part 11 Cone outer peripheral surface 14 End on the small diameter side of the cone outer peripheral surface 18 Plane part of extension part 21 Extension line of central axis of cone outer peripheral surface 50 First track ring 51 Second track ring 52 Cylindrical Roller 53 Cage 55 Cage Guide 56 Cage Guide 60 Cage Pocket 62 Pocket Side 64 Cage Guide Side 70 Processing Machine 71 Processing Machine Reference Surface 90 Extension Tip P The central axis of the outer peripheral surface of the cone P 'The center of the pocket

Claims (2)

A main body having a conical outer peripheral surface;
An extension portion extending from the main body portion to a region located on the opposite side of the axial outer circumferential surface side with respect to the axially small diameter end of the outer circumferential surface of the cone,
The extension portion is opposed to the extension line of the central axis of the outer circumferential surface of the cone at a region located on the opposite side, with a radial interval between the outer circumferential surface of the cone and a straight line substantially parallel to the extension line. A dimension measuring jig for a thrust roller bearing, comprising a flat portion including Two thrust roller bearing dimension measuring jigs according to claim 1, wherein the radial distance between the extension of the central axis and the flat portion is different from each other. Jig preparation process to prepare,
The circumferential side surface has a circular arc-shaped pocket, and a guide portion having a flat portion in contact with the upper surface of the bearing ring located on the lower side in the vertical direction when in use, and the radially outer side of the pocket has a diameter. A cage preparing step of preparing a thrust roller bearing cage that is open in a direction;
Of the two dimension measuring jigs for thrust roller bearings, the outer circumferential surface of one of the thrust roller bearing dimension measuring jigs having a small radial distance is connected to the dimension measuring jig for one thrust roller bearing. When the planar portion of the extending portion is inserted into the pocket from the radially outer side in a state in which the planar portion of the extending portion is substantially parallel to the planar portion of the guide portion, The extension portion contacts the side surface of the guide portion of the thrust roller bearing retainer, and the cone of the other thrust roller bearing dimension measuring jig of the two thrust roller bearing dimension measuring jigs. When the outer peripheral surface is locked to the side surface of the pocket in a state where the flat portion of the extension portion of the other dimension measuring jig for thrust roller bearing is substantially parallel to the flat portion of the guide portion, Thrus Judgment is made as to whether or not the flat portion of the dimension measuring jig for roller bearings is in a dimension allowable range in which the flat portion of the guide portion of the thrust roller bearing retainer overlaps the axial direction of the thrust roller bearing retainer. And a dimension confirming step for measuring the dimension of the thrust roller bearing.

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