JP2017207381A - Relief groove width dimension determination method of roller bearing and determination jig used in the method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a relief groove width dimension determination method of a roller bearing which can easily manage a relief groove width dimension at a low cost without using a high-accuracy measurement apparatus, and a determination jig used in the method.SOLUTION: A pin 11 whose outside diameter is set according to a relief groove width tolerance of a relief groove 29 is made to abut on a collar face 13 of a roller bearing in which the relief groove 29 is recessively formed at a corner at which a raceway surface 15 of a bearing ring and the collar face 13 of the bearing ring intersect with each other. The pin 11 is made to slide toward the relief groove 29 until a pin tip face 33 abuts thereon while making a pin side face 31 abut on the collar face 13. The pin 11 is made to slide from a position in which the pin 11 abuts and is stopped along the raceway surface 15, and slide resistance after a start of movement along the raceway surface 15 of the pin 11 is detected. It is determined whether or not a groove width dimension of the relief groove 29 is within the relief groove width tolerance on the basis of a change of the detected slide resistance.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for determining a clearance groove width dimension of a roller bearing and a determination jig used therefor.

  In the roller bearing, a relief groove is recessed at a corner where the raceway surface and the flange surface of the outer ring or the inner ring intersect. When the groove width dimension is larger than the specified tolerance, an edge load due to roller contact is generated and the bearing life is reduced. Further, when the tolerance is smaller than the specified tolerance, there is a possibility that interference of the tool may occur when the raceway surface or the collar surface is processed. For this reason, it is necessary to confirm that the clearance groove width dimension of the clearance groove is within a specified tolerance.

  In rolling bearing production lines, measuring instruments that can set dimensions of multiple parts such as the outer diameter, inner diameter, raceway diameter, and width of inner and outer rings are known as check items for workpieces after machining (Patent Literature). 1). This measuring instrument measures the dimension of a measurement part by bringing a measurement part corresponding to an item to be measured out of a plurality of measurement parts attached to a measurement lever into contact with the measurement part of the object to be measured.

Japanese Utility Model Publication No. 7-8709

  However, the above conventional measuring device can easily measure the dimensions using a micrometer, but there is a problem of further improving the measurement reliability of the measurement of the groove width dimension for the relief groove which is a minute part. . Therefore, the clearance groove width dimension cannot always be managed with sufficient accuracy. Further, if an advanced measuring device is used, the clearance groove width dimension can be managed with high accuracy, but the measuring operation itself becomes complicated, and the equipment cost and the equipment maintenance cost increase.

  The present invention has been made in view of the above situation, and an object of the present invention is to determine a clearance groove width dimension determination method for a roller bearing capable of easily managing the clearance groove width dimension at low cost without using an advanced measuring instrument, and to this. It is to provide a determination jig to be used.

The above object of the present invention is achieved by the following configuration.
(1) An outer diameter is set on the collar surface of the roller bearing in which a relief groove is recessed at a corner where the raceway surface of the raceway and the collar surface of the raceway intersect, depending on a clearance groove width tolerance of the relief groove. The pin side of the pin
The pin is slid toward the opening on the raceway surface side of the escape groove while abutting against the collar surface until the tip end surface of the pin abuts.
Sliding the pin along the track surface from the position where the pin hits and stops,
Detecting the sliding resistance of the pin after starting to move along the track surface of the pin,
Based on the detected change in the sliding resistance, it is determined whether the groove width dimension that opens along the raceway surface of the escape groove is within the clearance groove width tolerance,
A method for judging the clearance groove width of roller bearings.
According to the method for determining the clearance groove width dimension of the roller bearing configured as described above (1), the following effects are exhibited. That is, when using a pin whose outer diameter is set by the maximum tolerance of the clearance groove width, when the pin is advanced along the flange surface toward the clearance groove, the clearance groove width on the raceway surface side is related to the bearing width direction. When it is within the clearance groove width tolerance, the tip end surface of the pin hits the raceway surface, and the pin does not enter the escape groove that opens on the raceway surface side. When the pin is slid along the track surface in this state, the sliding resistance of the pin remains substantially constant. On the other hand, when the clearance groove width on the raceway surface side is larger than the clearance groove width tolerance, the pin enters the opening on the raceway surface side of the escape groove, and the pin tip surface comes into contact with the escape groove. When the pin is slid along the raceway surface in this state, the sliding resistance of the pin once increases when it climbs from the escape groove to the raceway surface. By detecting this change in sliding resistance, it is possible to accurately determine whether or not the clearance groove that opens along the raceway surface is within the clearance groove width tolerance.
Also, when using a pin whose outer diameter is set by the minimum tolerance of the clearance groove width, if the pin is advanced along the flange surface toward the clearance groove, the clearance groove width on the raceway surface side is related to the bearing width direction. When it is within the clearance groove width tolerance, the pin enters the opening on the raceway surface side of the clearance groove, and the tip end surface of the pin hits the clearance groove. On the other hand, when the clearance groove width on the raceway surface side is smaller than the clearance groove width tolerance, the pin tip surface comes into contact with the clearance groove, and the pin does not enter the escape groove opened on the raceway surface side. When the pin is slid along the raceway surface in the abutted state, the sliding resistance of the pin changes in the same manner as described above. Therefore, it is possible to accurately determine whether the escape groove is within the clearance groove width tolerance. Thereby, the clearance groove width dimension can be easily managed without using an advanced measuring instrument.

(2) An outer diameter is set on the raceway surface of the roller bearing in which a relief groove is recessed at a corner where the raceway surface of the raceway and the collar surface of the raceway intersect, depending on a clearance groove width tolerance of the relief groove. The pin side of the pin
The pin is slid toward the flange surface side opening of the escape groove while abutting against the raceway surface until the pin tip surface abuts,
Sliding the pin along the collar surface from the position where the pin hits and stops,
Detecting the sliding resistance of the pin after starting to move along the collar surface of the pin;
Based on the detected change in the sliding resistance, it is determined whether the groove width dimension that opens along the flange surface of the escape groove is within the clearance groove width tolerance,
A method for judging the clearance groove width of roller bearings.
According to the method for determining the clearance groove width dimension of the roller bearing configured as described above (2), the following effects are exhibited. That is, when using a pin whose outer diameter is set by the maximum tolerance of the clearance groove width, when the pin is advanced toward the clearance groove along the raceway surface, the clearance groove width on the collar surface side is related to the bearing radial direction. When the clearance is within the clearance groove width tolerance, the pin tip surface comes into contact with the flange surface, and the pin does not enter the clearance groove opened on the flange surface side. When the pin is slid along the collar surface in this state, the sliding resistance of the pin remains substantially constant. On the other hand, when the clearance groove width on the flange surface side is larger than the clearance groove width tolerance, the pin enters the opening on the flange surface side of the clearance groove, and the pin tip surface abuts in the clearance groove. When the pin is slid along the collar surface in this state, the sliding resistance of the pin once increases when it climbs from the escape groove to the collar surface. By detecting this change in sliding resistance, it is possible to accurately determine whether or not the clearance groove that opens along the flange surface is within the clearance groove width tolerance.
Also, when using a pin whose outer diameter is set by the minimum tolerance of the clearance groove width, if the pin is advanced toward the clearance groove along the raceway surface, the clearance groove width on the collar surface side will be related to the bearing radial direction. When the clearance is within the clearance groove width tolerance, the pin enters the opening on the flange surface side of the clearance groove, and the tip surface of the pin abuts in the clearance groove. On the other hand, when the clearance groove width on the flange surface side is smaller than the tolerance of the clearance groove width, the pin tip surface comes into contact with the flange surface. If the pin is slid along the flange surface in such a state, the sliding resistance of the pin changes in the same manner as described above, so it is accurately determined whether the escape groove is within the relief groove width tolerance. it can. Thereby, the clearance groove width dimension can be easily managed without using an advanced measuring instrument.

(3) A determination jig including the pin used in the roller groove relief groove determination method according to (1) or (2).
According to the determination jig having the configuration (3) above, whether or not the clearance groove is within the clearance groove width tolerance can be easily and accurately determined by determining whether or not the pin enters the clearance groove. Can be judged.

(4) The determination jig according to (3), further including a block that detachably fixes the pin base end of the pin with the pin front end surface as a front end.
According to the determination jig configured as described in (4) above, the block attached to the pin serves as a handle, and the handleability is improved. In addition, since the block supports the pin in a detachable manner, even if the pin is damaged or worn, it is only necessary to replace the pin, thereby improving maintenance.

(5) The determination jig according to (4), wherein the block supports the pin in a state where a pin side surface protrudes over the entire length of the pin.
According to the determination jig having the configuration (7), the side surface of the pin can be brought into contact with the surface of the roller bearing over the entire length of the pin, and the pin and the sliding surface can be easily arranged in parallel. Thereby, the workability of the determination work is improved and the determination accuracy is also improved.

(6) The determination jig according to any one of (3) to (5), wherein the pin has a circular axial cross-sectional shape.
According to the determination jig configured as described in (6) above, when the pin slides on the sliding surface, the distance between the pin and the sliding surface can be made constant even if the pin rotates about the axis. . Thereby, the determination accuracy of the clearance groove width dimension is enhanced.

(7) In the block, a slit that supports the pin is formed on one flat side surface, and the slit is an arc that exceeds a half of the outer circle of the pin in a cross-sectional view orthogonal to the extending direction of the slit. (6) The determination jig according to (6), further including a pin holding portion that holds the region.
According to the determination jig having the configuration (7), the pin having a circular shaft cross-sectional shape can be stably supported on one side surface of the block. Thereby, it becomes easy to move a pin side surface in parallel with a to-be-slided surface, and workability | operativity is improved.

(8) The determination jig according to (6) or (7), wherein the pin tip surface is a flat surface having an outer diameter equal to an outer diameter of the pin.
According to the determination jig configured as described in (8) above, the outer diameter of the pin tip surface that enters the clearance groove can be matched with the pin outer diameter set by the clearance groove width tolerance with high accuracy. Thereby, the determination accuracy of the clearance groove width dimension is enhanced.

(9) A roller bearing is manufactured by using the race ring in which the clearance groove is within the clearance groove width tolerance according to the clearance groove width determining method of the roller bearing according to (1) or (2). Manufacturing method of bearing.
According to the method for manufacturing a roller bearing of (9) above, since the race ring having the clearance groove width formed with high accuracy is used, it is possible to manufacture a roller bearing having a long bearing life that hardly causes an edge load.

  According to the present invention, the clearance groove width dimension can be easily managed at low cost without using an advanced measuring instrument.

It is explanatory drawing which shows the procedure of the clearance groove width dimension determination method of the roller bearing which concerns on this invention. It is sectional drawing showing an example of the roller bearing to which the clearance groove width dimension determination method of a roller bearing is applied. (A)-(C) is process explanatory drawing showing the clearance groove width dimension determination method of the roller bearing according to the movement process of a pin. It is a graph which shows typically the relation between the movement distance of a pin, and the sliding resistance of a pin. It is process explanatory drawing when an escape groove is smaller than the outer diameter of a pin front end surface. It is process explanatory drawing which shows the state which contacted the pin side surface with the track surface. It is a principal part expanded sectional view of the roller bearing in which a flange surface inclines. It is process explanatory drawing which shows the procedure of the clearance groove width dimension determination method of a roller bearing using the jig | tool for determination of another structure. It is a top view which shows an example of the jig | tool for evaluation which has a block. (A) is the sectional view on the AA line of FIG. 9, (B) is the sectional view on the BB line of FIG. It is a principal part expanded sectional view of the pin clamping part of the jig for determination. It is the perspective view which notched a part of other cylindrical roller bearing. It is the perspective view which notched a part of tapered roller bearing. (A) is a perspective view of a judgment situation when the pin is slid from the collar surface side, and (B) is a perspective view of a judgment situation when the pin is slid from the raceway surface side. It is explanatory drawing showing the determination result of the clearance groove width of a track surface. It is explanatory drawing showing the determination result of the clearance groove width | variety by the side of a collar surface.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
<First determination example>
FIG. 1 is an explanatory view showing a procedure of a method for determining a clearance groove width dimension of a roller bearing according to the present invention.
In the method for determining the clearance groove width dimension of the roller bearing, a pin 11 having an outer diameter φD set by a clearance groove width tolerance of the clearance groove 29 is generally used as the determination jig 100. The pin side surface 31 of the pin 11 is brought into contact with the collar surface 13 of the raceway (first moving step). Next, the pin 11 is slid toward the opening on the raceway surface side of the escape groove 29 while being in contact with the flange surface 13 until the pin tip surface 33 abuts (second movement step). Then, the pin 11 is slid along the raceway surface 15 of the raceway from the position where the pin 11 hits and stops (third movement step). The sliding resistance of the pin 11 after starting the movement along the raceway surface 15 of the pin 11 is detected (sliding resistance detection step), and the opening is made along the raceway surface based on the change of the detected sliding resistance. It is determined whether the clearance groove width LB of the clearance groove 29 is within the clearance groove tolerance (determination step).

An example in which the above-described roller groove clearance groove size determination method is applied to the following roller bearing will be described in detail.
FIG. 2 is a cross-sectional view showing an example of a roller bearing to which the roller groove clearance groove size determining method is applied.
The roller bearing 17 includes an outer ring 19 having a raceway surface 15 on an inner peripheral surface and an inner ring 23 having a raceway surface 21 on an outer peripheral surface. A plurality of rolling elements 25 are arranged between the raceway surface 15 of the outer ring 19 and the raceway surface 21 of the inner ring 23 so as to be able to roll. The plurality of rolling elements 25 are held by the cage 27 at substantially equal intervals in the circumferential direction. In the roller bearing 17 of this configuration, the escape groove 29 is recessed at the corner where the raceway surface 15 of the outer ring 19 and the flange surface 13 of the outer ring 19 intersect. In the following description of the present configuration, the track surface is described as indicating the track surface 15 of the outer ring 19, and the collar surface is the collar surface 13 of the outer ring 19.

  A determination jig 100 shown in FIG. 1 is formed of a pin 11 having a circular cross section perpendicular to the axial direction and having an outer diameter (pin diameter) φD set by a maximum tolerance value of the clearance groove width LB of the clearance groove 29. . The clearance groove width LB is an opening width in the bearing width direction along the raceway surface 15 on the raceway surface 15 side of the escape groove 29. The outer diameter φD of the pin 11 is preferably set to a diameter slightly smaller than the maximum tolerance value of the clearance groove width LB. By doing so, when the clearance groove width LB is substantially the same as the tolerance maximum value, the pin 11 easily enters the clearance groove, and whether or not the pin can be inserted is determined with the tolerance maximum value as a boundary.

3 (A) to 3 (C) are process explanatory views showing the roller groove relief groove width determining method for each pin moving process.
In the first moving step in the above-described roller bearing relief groove width determining method, as shown in FIG. 3A, the pin 11 is parallel to the flange surface 13 of the outer ring 19 and the axial direction of the outer ring 19. The pin side surface 31 is brought into contact with the collar surface 13 by moving in the direction indicated by the middle arrow S1.

  Next, as shown in FIG. 3 (B), in the second movement step, the pin 11 is slid in the direction indicated by the arrow S2 in the figure toward the radially outer side while the pin side surface 31 is in contact with the collar surface 13. Let That is, the pin 11 is slid radially outward toward the opening on the raceway surface 15 side of the escape groove 29 until the pin tip surface 33 abuts.

  At this time, if the clearance groove width LB (see FIG. 1) of the clearance groove 29 is larger than the maximum clearance groove width tolerance, the pin tip surface 33 of the pin 11 escapes as illustrated in FIG. 3B. The pin 29 enters the groove 29 and the pin front end surface 33 abuts in the escape groove 29 and stops.

  Then, as shown in FIG. 3C, in the third movement step, from the abutting position of the outer ring 19 against which the pin tip surface 33 of the pin 11 is abutted, an arrow S3 in the figure that is the axial direction of the outer ring 19 The pin 11 is slid along the track surface 15 in the direction shown.

  In the case of the illustrated example, when the pin 11 is slid along the track surface 15, the sliding resistance of the pin 11 temporarily increases when the pin 11 rides on the track surface 15 from the escape groove 29. That is, the pin 11 is caught when sliding.

  FIG. 4 is a graph schematically showing the relationship between the moving distance of the pin and the sliding resistance of the pin. As shown in the figure, during the period in which the pin slides with the inclined surface of the relief groove, a sliding resistance peak is generated in which the sliding resistance once increases. Then, as shown in FIG. 3C, when the pin 11 completely rides on the raceway surface 15, the sliding resistance is lowered and changes at a substantially constant value.

  On the other hand, as shown in FIG. 5, when the clearance groove width LB of the clearance groove 29 is within the clearance groove width tolerance, even if the pin 11 is slid along the arrow S <b> 2 in the figure, the pin 11 remains in the clearance groove 29. A part of the pin tip surface 33 comes into contact with the raceway surface 15 and stops.

  In this state, when the pin 11 is slid along the raceway surface 15 in the direction indicated by the arrow S3 in the figure, the sliding resistance of the pin 11 remains substantially constant. That is, immediately after the movement in the S3 direction, the pin 11 does not enter the escape groove 29 and moves without being caught.

  By detecting the change in the sliding resistance with the sense of the judge, it can be determined whether or not the clearance groove width LB is within the clearance groove width tolerance. The presence or absence of this change in sliding resistance can be reliably perceived as the presence or absence of catching by the feel of the judge.

  That is, when detecting the sliding resistance, if the pin 11 does not change in sliding resistance and smoothly moves in the direction of S3, the clearance groove width LB is equal to or smaller than the pin diameter φD (or smaller than the pin diameter φD). It turns out that it is. That is, the clearance groove width LB is within the clearance groove width tolerance and is determined to be OK. On the contrary, when the pin 11 is moved in the S3 direction and the sliding resistance changes and a peak occurs, the pin 11 has entered the escape groove 29, and the escape groove width LB is greater than the pin diameter φD. It can be seen that it is large (or a width equal to or larger than the pin diameter φD). That is, the clearance groove width LB is larger than the clearance groove width tolerance and is judged as NG. As a result, the clearance groove width can be easily managed at low cost without using an advanced measuring instrument.

  In the above determination example, the outer diameter of the pin 11 is set by the maximum tolerance value of the clearance groove width LB to determine whether the clearance groove width is within the tolerance. However, the outer diameter of the pin 11 is determined to be within the clearance groove width LB. By setting the minimum tolerance value, it is possible to determine whether the clearance groove width is within the tolerance by the same procedure as described above.

  That is, when the outer diameter of the pin 11 is set by the minimum tolerance value of the clearance groove width LB, if the pin 11 enters the clearance groove 29, the clearance groove width is within the tolerance and the OK determination is made. If the pin 11 does not enter the clearance groove 29, the clearance groove width is smaller than the tolerance, and an NG determination is made.

  In the above determination example, the outer ring 19 is a determination target. However, when the escape groove exists in the inner ring 23, the clearance groove width dimension is escaped similarly to the above using the raceway surface and the collar surface of the inner ring 23. It can be determined whether the tolerance is within the groove width.

  As described above, the outer diameter of the pin 11 is formed slightly smaller than the standard value which is the maximum tolerance value or the minimum tolerance value of the clearance groove widths LA and LB. The difference from this standard value is determined. It can be appropriately changed according to the groove shape of the object. For example, the difference is a value that is smaller than a specified value, and is a difference between 0 and 0.1 mm, that is, a difference between −0.1 mm. The difference is preferably between -0.05 mm, more preferably between -0.01 mm.

  For example, as the outer diameter of the pin 11 becomes smaller from the maximum tolerance, even if the pin 11 enters the escape groove 29, it may not necessarily be a determination object for NG determination. Therefore, the slightly smaller diameter is a dimension that allows the pin 11 to easily enter the clearance groove, and is set to a dimension that does not substantially reduce the accuracy of determining whether the clearance groove width is within the tolerance. .

  Thus, according to this determination method, the OK / NG determination of the determination target can be performed accurately. Therefore, for example, when processing an object to be determined on the production line, only the OK determination product can be transported to the subsequent stage of the manufacturing line, and the NG determination product can be reliably removed from the production line, thereby generating unnecessary processing. A highly efficient production line can be constructed.

<Second determination example>
Next, a procedure for moving the pin 11 in the direction opposite to that in the first determination example and determining the clearance groove width dimension in the radial direction will be described. In the following description, the same members and corresponding members are assigned the same reference numerals, and the description thereof is simplified or omitted.

FIG. 6 is a process explanatory diagram illustrating a state in which the pin side surface 31 is in contact with the raceway surface 15.
In this determination example, the clearance groove width LH is determined. The clearance groove width LH is a radial opening width along the flange surface 13 on the flange surface 13 side of the escape groove 29.

  In this case, the pin 11 having the pin diameter φD set by the maximum tolerance value of the clearance groove width LH of the clearance groove 29 to be determined is used. The pin 11 is moved parallel to the raceway surface 15 in the direction of the arrow S1 in the figure, and the pin side surface 31 of the pin 11 is brought into contact with the raceway surface 15. Then, the pin 11 is moved toward the opening on the flange surface 13 side of the escape groove 29 until the pin tip surface 33 abuts against the raceway surface 15 while the pin side surface 31 abuts. That is, the pin 11 is slid in the direction of the arrow S2 in the figure, which is the axial direction of the outer ring 19.

Next, the pin 11 is slid along the collar surface 13 from the abutting position where the pin 11 is abutted. That is, the pin 11 is slid in the direction of the arrow S3 in the figure toward the radially inner side of the outer ring 19. And the sliding resistance after a movement start to the direction of S3 along the collar surface 13 of the pin 11 is detected with a judge's sense.
Based on the change in the sliding resistance detected at this time, it is determined whether the clearance groove width LH of the clearance groove 29 is within the clearance groove width tolerance.

  When the pin 11 is moved in the direction of S3, when the sliding resistance remains constant and no sliding resistance peak occurs, the clearance groove width LH is equal to or smaller than the pin diameter φD (or smaller than the pin diameter φD). ). That is, the clearance groove width LH is within the clearance groove width tolerance, and is OK. On the other hand, when the pin 11 moves in the S3 direction and the sliding resistance changes and peaks, the pin 11 enters the escape groove 29, and the escape groove width LH is greater than the pin diameter φD. It can be seen that it is large (or more than the pin diameter φD). That is, the clearance groove width LH is larger than the clearance groove width tolerance, and is judged as NG.

  In some roller bearings, as shown in FIG. 7, the flange surface 13 is inclined at an angle θ with respect to the radial direction. Thus, in the roller bearing in which the flange surface 13 is inclined, it is preferable to determine the clearance groove width dimension according to the procedure shown in the second determination example.

  According to the above-described method of determining the clearance groove width of the roller bearing, the pin 11 is moved toward the clearance groove 29 while being in contact with the flange surface 13 or the raceway surface 15. The clearance groove width LB can be determined by the sliding resistance of the pin 11 which is different depending on whether or not. Thereby, the clearance groove width dimension can be easily managed without using an advanced measuring instrument.

  In the above determination example, the outer diameter of the pin 11 is set by the maximum tolerance value of the clearance groove width LH, and it is determined whether the clearance groove width is equal to or less than the maximum tolerance value. By setting with the minimum tolerance value of the width LH, it is possible to determine whether the clearance groove width is within the tolerance by the same procedure as described above.

  That is, when the pin 11 enters the clearance groove 29, the clearance groove width is within the tolerance, and the determination is OK. If the pin 11 does not enter the clearance groove 29, the clearance groove width is smaller than the tolerance and an NG determination is made.

  In the above determination example, the outer ring 19 is a determination target. However, when the escape groove exists in the inner ring 23, the clearance groove width dimension is escaped similarly to the above using the raceway surface and the collar surface of the inner ring 23. It can be determined whether the tolerance is within the groove width.

  In the determination jigs 100 and 110 described above, the axial cross-sectional shape of the pin 11 is circular. Therefore, when the pin 11 is slid with the sliding surface (the collar surface 13 and the raceway surface 15), the distance between the pin 11 and the sliding surface is kept constant even if the pin 11 rotates around the axis. it can. Thereby, the determination accuracy of the clearance groove width dimension does not decrease.

<Other configuration examples of the determination jig>
FIG. 8 is a process explanatory view showing the procedure of a method for determining a clearance groove width dimension of a roller bearing using a determination jig having another configuration.
This configuration example is the same as the configuration and procedure shown in the first and second determination examples described above, except that the determination jig 110 having a configuration in which the block 35 is attached to the pin 11 is used as the determination jig. .

  In the determination jig 110 of this configuration, the block 35 is attached to the pin 11, so that the block 35 becomes a handle and the handleability is improved. The block 35 may be a member using a metal material such as a steel material or a brass material, a resin material, or the like, or may be a member combining a plurality of types of materials, and has a strength capable of fixing the pin 11. Just do it.

  In the determination jig 110, the pin proximal end of the pin 11 opposite to the pin distal end surface 33 is fixed to the block 35. If the block 35 is configured to support the pin 11 in a detachable manner, even if the pin 11 is damaged or worn, it is only necessary to replace the pin 11 and the maintainability is improved.

9 is a plan view showing an example of an evaluation jig having a block, FIG. 10A is a cross-sectional view taken along line AA in FIG. 9, and FIG. 9B is a cross-sectional view taken along line BB in FIG.
As shown in FIG. 9, the block 35 of this configuration is formed in an L-shaped plate, and the pin 11 is attached to one side surface 37 on one end side and one side surface 37 on the other end side of the L-shaped plate block 35. The slits 39 to be sandwiched are respectively formed. As shown in FIGS. 10A and 10B, the slit 39 is a groove that bisects one end side and the other end side of the block 35 in the plate thickness direction.

  The block 35 is L-shaped so that two pins 11 can be attached to one block 35. For example, the determination of the escape groove width LB or the escape groove width LH is performed by attaching a pin set with the maximum tolerance value of the clearance groove width LB or the clearance groove width LH and a pin set with the minimum tolerance value to one block 35. Only one evaluation jig is required. Further, when determining only the maximum tolerance side of the clearance groove width LB and the clearance groove width LH, a pin set by the maximum tolerance value of the clearance groove width LB and the clearance groove width LH is provided in one block 35. It may be configured. Similarly, in the case where only the tolerance minimum value side is determined, a pin set by each tolerance minimum value may be provided in one block 35. Thereby, only one evaluation jig is used, and the working efficiency is improved. Further, by making the block 35 L-shaped, the evaluation jig itself can be made compact, and interference with surrounding members can be reduced during determination use.

  The block 35 sandwiches the pins 11A and 11B in the formed slit 39 and fastens them with fixing bolts 41 to fix the pins 11A and 11B, respectively. Thereby, the block 35 can support a plurality of types of pins having a pin diameter φD in a replaceable manner.

  The block 35 can also display identification information such as the pin diameter size on the identification unit 43 so that identification can be made for each different clearance groove width LB. Information such as characters and marks may be engraved on the identification unit 43, and a sticker on which the information is written may be attached. In addition, the color of the identification unit 43 may be changed for identification, or an identification medium such as an RFID tag, a barcode, or a QR code (registered trademark) may be arranged.

  In the pins 11A and 11B, the peripheral edge of the pin tip surface 33 is an edge portion that is not chamfered. Accordingly, the pin tip surface 33 is a flat surface having an outer diameter equal to the outer diameter of the pins 11A and 11B. These pins 11A and 11B can be used by cutting a commercially available pin gauge or the like, and a highly accurate outer diameter can be easily obtained.

FIG. 11 is an enlarged cross-sectional view of the main part of the pin clamping portion of the determination jig.
In the block 35, a pin clamping portion 45 is formed on a flat one side surface 37 along an extending direction orthogonal to the depth direction of the slit 39. The pin clamping portion 45 is formed in an arc shape along the outer circle of the pin 11 in a cross-sectional view orthogonal to the extending direction of the slit 39. The pin-clamping portion 45 having an arc-shaped cross section has an arc surface that clamps an arc region that exceeds half of the outer circle 47 of the pin 11. That is, the pin clamping portion 45 has an arc surface with a height exceeding the center O from the inner end Pin of the outer circle 47 of the pin 11 in the cross section shown in FIG. 11, and prevents the pin 11 from coming off from the pin clamping portion 45. Hold it.

  The block 35 has an outer end Pout of the outer circle 47 of the pin 11 protruding outward from one side surface 37 of the block 35 over the entire length of the pin 11.

  According to the determination jig 110 configured as described above, since the cylindrical pin 11 can be held in parallel with the one side surface 37 of the block 35, the pin side surface 31 can be easily moved in parallel with the sliding surface. Therefore, the workability of the determination work can be improved and the determination accuracy can be improved.

  The application target of the roller groove clearance groove determining method described above is not limited to the roller bearing 17 shown in FIG. For example, the clearance groove width can be similarly determined and managed for the roller bearings having other configurations shown in FIGS.

  FIG. 12 is a perspective view in which a part of another cylindrical roller bearing is cut out, and FIG. 13 is a perspective view in which a part of the tapered roller bearing is cut out.

  A cylindrical roller bearing 53 shown in FIG. 12 is incorporated in a rotation support portion to which a radial load is applied. The cylindrical roller bearing 53 includes an outer ring 19 having a cylindrical concave outer ring raceway 57 on the inner peripheral surface, an inner ring 23 having a cylindrical convex inner ring raceway 59 on the outer peripheral surface, and the outer ring raceway 57 and the inner ring raceway 59. A plurality of cylindrical rollers 61 each provided as a rolling element are provided so as to be able to roll while being held by the cage 27. Further, an inward flange 63 is formed at both ends of the inner peripheral surface of the outer ring 19, and an outward flange 65 is formed at one end of the outer peripheral surface of the inner ring 23. In this case, the method for determining the clearance groove width dimension of the roller bearing and the determination jig used therefor are the clearance groove 29 between the outer ring raceway 57 and the inward flange portion 63, and between the inner ring raceway 59 and the outward flange portion 65. This is applicable to the determination of the escape groove 29.

  A tapered roller bearing 55 shown in FIG. 13 includes an outer ring 19 having a conical concave outer ring raceway 57 on the inner peripheral surface, an inner ring 23 having a conical convex inner ring raceway 59 on the outer peripheral surface, and these outer ring raceway 57 and inner ring raceway. 59, a plurality of tapered rollers 67, each of which is a rolling element, are provided so as to be able to roll while being held by the cage 27. In addition, among the both ends of the outer peripheral surface of the inner ring 23, a large-diameter side collar 69 is formed at the large-diameter side end, and a small-diameter side collar 71 is formed at the small-diameter side end. In this case, the method for determining the clearance groove width dimension of the roller bearing and the determination jig used therefor are between the inner ring raceway 59 and the large diameter side flange 69 and between the inner ring raceway 59 and the small diameter side flange 71. This is applicable to the determination of each escape groove 29.

  Furthermore, the method for determining the clearance groove width dimension of the roller bearing and the determination jig used therefor can be applied to a clearance groove provided in the spherical roller bearing, although illustration is omitted.

  The present invention is not limited to the above-described embodiments, and the configurations of the embodiments may be combined with each other, or may be modified or applied by those skilled in the art based on the description of the specification and well-known techniques. The invention is intended and is within the scope of seeking protection.

  For example, although the determination jig of the above configuration example has been described as being determined based on the operator's touch, the determination jig is provided with a sensor for detecting sliding resistance in a block or the like, and changes in sliding resistance are detected by a speaker. The operator may be informed with a simple configuration such as a sound from a light source, light emission of a light source such as an LED, display of numerical information by a meter, or the like. As a sensor for detecting sliding resistance, a pressure sensor, an acceleration sensor, or the like can be used.

  The roller bearings to be judged are gearboxes such as transmissions and differential gears, vehicles such as automobiles and railway vehicles, construction machinery vehicles, steel manufacturing facilities, papermaking facilities, windmills, water mills, machine tools, construction machinery, mining machinery. It can be suitably applied to uses such as agricultural machinery, roller support such as conveyance and rolling.

Using the determination jig 110 manufactured with the above configuration, OK / NG determination of the clearance groove width LB (confirmation that there was no tolerance upper limit deviation) was performed. The results will be described below.
14A is a perspective view of a judgment situation when the pin is slid from the collar surface side, FIG. 14B is a perspective view of a judgment situation when the pin is slid from the raceway surface side, and FIG. FIG. 16 is an explanatory diagram showing the determination result of the clearance groove width LB on the collar surface side, and FIG. 16 is an explanatory diagram showing the determination result of the clearance groove width LH on the flange surface side.

  The OK / NG determination of the clearance groove widths LB and LH was performed by a touch determination by confirming whether or not the pin 11 could be inserted into the clearance groove 29 by seven persons. In addition, the judgment person was made to judge by two choices whether the pin 11 enters the known escape groove 29 (NG) or not (OK) without giving information on the diameter of the pin 11.

  FIG. 15 shows the accuracy confirmation result of the clearance groove width LB determined by sliding the pin 11 from the collar surface shown in FIG. FIG. 16 shows the accuracy confirmation result of the clearance groove width LH determined by sliding the pin 11 from the rolling surface shown in FIG. As can be seen from FIGS. 15 and 16, the NG determination could be confirmed with 100% accuracy when the pin 11 having an outer diameter of −0.02 mm with respect to the actually measured value was used for determination. Therefore, if the pin diameter is −0.02 mm with respect to the standard value, a determination result with high reproducibility can be obtained by determining whether or not the pin 11 has been inserted into the clearance groove 29. In other words, an object to be determined that clearly deviates from the standard value can be reliably determined as NG regardless of the difference of the determiner. As described above, in this determination method, the outer diameter of the pin 11 may be adjusted according to the accuracy required for the determination target and the work efficiency of the determination person. In this case, the determination of the determination target is performed under the optimum conditions. Can be implemented.

  In addition, when the determination was performed by three determiners using a general thickness gauge, the detection accuracy exceeded 0.1 mm.

11 Pin 13 Collar surface 15 Raceway surface 17 Roller bearing 19 Outer ring 23 Inner ring 29 Relief groove 31 Pin side surface 33 Pin tip surface 35 Block 37 One side surface 39 Slit 45 Pin clamping portion 47 External circle 100, 110 Judgment jig LB Relief groove width

Claims (3)

A pin whose outer diameter is set on the collar surface of the roller bearing in which a relief groove is recessed at a corner where the raceway surface of the raceway and the collar surface of the raceway intersect is set by the clearance groove width tolerance of the relief groove. Abut the pin side,
The pin is slid toward the opening on the raceway surface side of the escape groove while abutting against the collar surface until the tip end surface of the pin abuts.
Sliding the pin along the track surface from the position where the pin hits and stops,
Detecting the sliding resistance of the pin after starting to move along the track surface of the pin,
Based on the detected change in the sliding resistance, it is determined whether the groove width dimension that opens along the raceway surface of the escape groove is within the clearance groove width tolerance,
A method for judging the clearance groove width of roller bearings. A pin whose outer diameter is set on the raceway surface of the roller bearing in which a relief groove is recessed at the corner where the raceway surface of the raceway and the collar surface of the raceway intersect is set by the clearance groove width tolerance of the relief groove. Abut the pin side,
The pin is slid toward the flange surface side opening of the escape groove while abutting against the raceway surface until the pin tip surface abuts,
Sliding the pin along the collar surface from the position where the pin hits and stops,
Detecting the sliding resistance of the pin after starting to move along the collar surface of the pin;
Based on the detected change in the sliding resistance, it is determined whether the groove width dimension that opens along the flange surface of the escape groove is within the clearance groove width tolerance,
A method for judging the clearance groove width of roller bearings.   A determination jig including the pin used in the method for determining a clearance groove width of a roller bearing according to claim 1.

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