JP6648583B2 - measuring device - Google Patents

Description

  The present invention relates to a measuring device for measuring the diameter of a rolling bearing.

  For example, a dial gauge is used to measure an outer diameter and an inner diameter of a rolling bearing (for example, see Patent Document 1). In order to automate this measurement by, for example, a measuring device, it is necessary to accurately position and install a rolling bearing to be measured at a predetermined position of the measuring device. Therefore, conventionally, as shown in FIG. 7, a receiving jig 99 for positioning the rolling bearing 90 is used. The receiving jig 99 has a convex portion 98 for positioning the inner ring 91 in the radial direction, an annular receiving surface 97 for receiving the axial side surface of the rolling bearing 90, and an annular shape for positioning the outer ring 92 in the radial direction. Has an outer wall portion 96.

  The bearing jig 99 positions the rolling bearing 90 in the radial direction and the axial direction, and a measuring tool such as a dial gauge approaches the rolling bearing 90 to measure the diameter of the rolling bearing 90.

JP 2011-232173 A

  In order to install the rolling bearing 90 on the receiving jig 99 shown in FIG. 7, the inner peripheral surface 91a of the inner ring 91 is fitted to the convex portion 98, and the side surface 91b of the inner ring 91 is brought into contact with the annular receiving surface 97. It is necessary to fit the outer peripheral surface 92a of the outer race 92 to the outer wall 96. The rolling bearing 90 shown in FIG. 7 is an angular ball bearing, and since the difference width δ is provided between the inner ring 91 and the outer ring 92, the side surface 91b of the inner ring 91 comes into contact with the receiving surface 97 at the surface. .

  In the case of the receiving jig 99 shown in FIG. 7, it is necessary to fit the inner ring 91 to the convex portion 98 and the outer ring 92 to the outer wall portion 96 at the same time. Conventionally, when the size (model number) of the rolling bearing 90 changes, the receiving jig 99 must always be replaced. For example, even if the inner diameter of the inner ring 91 is the same, if the outer diameter of the outer ring 92 is different, another receiving jig corresponding to this is required. For this reason, it takes time to select and replace the receiving jig 99, and if the workability of installing the rolling bearing 90 on the jig 99 is poor as described above, it takes time for the measurement work, and the productivity is high. Improvement is hindered.

  Therefore, the present invention provides a rolling bearing having a model number in which one of the inner diameter and the outer diameter is the same but the other is different, while the work of receiving the rolling bearing to be measured is easily installed on the jig. It is still another object of the present invention to provide a measuring apparatus which can perform positioning without changing a receiving jig.

  The present invention is a measuring device for measuring the diameter of a rolling bearing in which an outer ring is movable in a small dimension in an axial direction from a reference state with respect to an inner ring, and a bearing for holding the rolling bearing in a mounted state. A jig and a measuring means for measuring a diameter of the rolling bearing held by the receiving jig, wherein the receiving jig has an annular shape in contact with a side surface on the other axial side of the inner ring. An inner receiving surface, an inner receiving portion having a convex portion for fitting with the inner peripheral surface of the inner ring and positioning the inner ring in the radial direction, and an annular outer surface abutting on the other axial side surface of the outer ring. An outer receiving portion that has a receiving surface and is in non-contact with the outer peripheral surface of the outer ring, wherein the inner receiving surface is a surface on a first virtual horizontal plane, and the outer receiving surface is the first virtual A plane on a second virtual horizontal plane parallel to the horizontal plane, and The inner receiving surface and the outer receiving surface are provided at different positions in the vertical direction with a dimensional difference not less than the difference width between the inner ring and the outer ring and not more than the sum of the difference width and the minute dimension. .

According to the receiving jig of this measuring device, in order to position the rolling bearing, the inner ring may be fitted to the convex portion of the inner receiving portion, the inner ring may be placed on the inner receiving surface, and the outer ring may be placed on the outer receiving surface. . When the outer ring is placed on the outer receiving surface, the outer receiving portion is not in contact with the outer peripheral surface of the outer ring. In other words, in order to position and hold the rolling bearing on the jig, it is not necessary to fit the inner ring to the convex portion and to fit the outer ring to the outer wall portion, unlike the conventional method. The work of installing the bearing on the jig becomes easy.
Also, even when measuring the diameter of a rolling bearing having the same inner diameter but a different outer diameter (for example, a larger outer diameter), the outer receiving portion of the receiving jig is in non-contact with the outer peripheral surface of the outer ring. Therefore, it is possible to measure the positioning and the diameter of such rolling bearings having different model numbers. That is, even if the rolling bearings have the same inner diameter but different outer diameters, the positioning can be performed without replacing the receiving jig, and the diameter can be measured.

  The inner receiving surface is a surface on a first virtual horizontal plane, and the outer receiving surface is a surface on a second virtual horizontal plane parallel to the first virtual horizontal plane. The surface is provided at a position different in the vertical direction by a dimensional difference not less than the difference width between the inner ring and the outer ring and not more than the sum of the difference width and the minute dimension. Therefore, if the inner ring is placed on the inner receiving surface and the outer ring is placed on the outer receiving surface, the center line of each of the inner ring and the outer ring is oriented in a vertical direction and positioned. For this reason, by measuring the diameter of the rolling bearing from the horizontal direction by the measuring means, the measurement can be performed with high accuracy.

  In the rolling bearing to be measured, the inner ring and the outer ring can move in the axial direction by a small dimension from the reference state due to the axial internal clearance of the rolling bearing.

  Further, the inner receiving surface and the outer receiving surface are provided at different positions in the axial direction with a dimensional difference that is larger than the difference width between the inner ring and the outer ring and is equal to or less than the sum of the difference width and the minute size. Preferably. In this case, it is possible to cope with a rolling bearing in which the accuracy of the difference width varies. Further, even when a rolling bearing of a model number whose difference width is slightly larger than that of the rolling bearing previously measured is measured, the receiving jig does not need to be replaced.

  Further, the present invention is a measuring device for measuring the diameter of a rolling bearing in which the inner ring can move in a small dimension in the axial direction from the reference state with respect to the outer ring, and holds the rolling bearing in a state where the rolling bearing is mounted. And a measuring means for measuring the diameter of the rolling bearing held by the receiving jig, wherein the receiving jig abuts on the other axial side surface of the outer ring. An outer receiving surface having an annular outer surface, an outer receiving portion having an annular outer wall portion for fitting with the outer peripheral surface of the outer ring and positioning the outer ring in the radial direction, and abutting against the other axial side surface of the inner ring; Having an annular inner receiving surface, and having an inner receiving portion that is not in contact with the inner peripheral surface of the inner ring, wherein the inner receiving surface is a surface on a first virtual horizontal plane, and the outer receiving surface is A surface on a second virtual horizontal plane parallel to the first virtual horizontal plane And the inner receiving surface and the outer receiving surface are displaced in the vertical direction by a dimensional difference not less than the difference width between the inner ring and the outer ring and not more than the sum of the difference width and the minute dimension. It is provided.

According to the receiving jig of this measuring device, in order to position the rolling bearing, the outer ring is fitted to the annular outer wall portion of the outer receiving portion, the outer ring is placed on the outer receiving surface, and the inner ring is placed on the inner receiving surface. I just need. When the inner ring is placed on the inner receiving surface, the inner receiving portion is not in contact with the inner peripheral surface of the inner ring. In other words, since the outer ring is fitted to the outer wall and the inner ring is not required to be fitted to the convex portion as in the related art in order to position and hold the rolling bearing on the jig, the rolling object to be measured is not required. The work of installing the bearing on the jig becomes easy.
Further, even when measuring the diameter of a rolling bearing having the same outer diameter but a different inner diameter (for example, a smaller inner diameter), the inner receiving portion of the receiving jig does not contact the inner peripheral surface of the inner ring. Therefore, it is possible to perform positioning and measurement of the diameter of such rolling bearings having different model numbers. That is, even if the rolling bearings have the same outer diameter but different inner diameters, they can be positioned without changing the receiving jig, and the diameter can be measured.

  The inner receiving surface is a surface on a first virtual horizontal plane, and the outer receiving surface is a surface on a second virtual horizontal plane parallel to the first virtual horizontal plane. The surface is provided at a position different in the vertical direction by a dimensional difference not less than the difference width between the inner ring and the outer ring and not more than the sum of the difference width and the minute dimension. Therefore, if the inner ring is placed on the inner receiving surface and the outer ring is placed on the outer receiving surface, the center line of each of the inner ring and the outer ring is oriented in a vertical direction and positioned. For this reason, by measuring the diameter of the rolling bearing from the horizontal direction by the measuring means, the measurement can be performed with high accuracy.

  Further, the inner receiving surface and the outer receiving surface are provided at different positions in the axial direction with a dimensional difference that is larger than the difference width between the inner ring and the outer ring and is equal to or less than the sum of the difference width and the minute size. Preferably. In this case, it is possible to cope with a rolling bearing in which the accuracy of the difference width varies. Further, even when a rolling bearing of a model number whose difference width is slightly larger than that of the rolling bearing previously measured is measured, the receiving jig does not need to be replaced.

  According to the measuring device of the present invention, the work of receiving the rolling bearing to be measured and installing it on the jig becomes easy, and the rolling of a model number in which one of the inner diameter and the outer diameter is the same but the other is different. Even a bearing can be positioned without changing a receiving jig. For this reason, it can contribute to the efficiency of the measurement operation.

It is a front view showing one embodiment of a measuring device of the present invention. It is a side view of the measuring device shown in FIG. It is sectional drawing of a rolling bearing. It is sectional drawing which shows the state in which the rolling bearing was mounted on the receiving jig. It is explanatory drawing in case an outer ring moves to one axial direction about a predetermined dimension. It is sectional drawing which shows the state in which the rolling bearing was mounted on the receiving jig of another form. It is sectional drawing of the conventional receiving jig and rolling bearing.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[About the outline of the measuring device]
FIG. 1 is a front view showing an embodiment of the measuring device of the present invention. FIG. 2 is a side view of the measuring device shown in FIG. The measuring device 10 includes a receiving jig 11 that holds a rolling bearing 40 to be measured as a mounted state, and a measuring unit that measures a diameter of the rolling bearing 40 held by the receiving jig 11. Have. The measuring device 10 shown in FIGS. 1 and 2 measures the inner diameter measuring means 51 for measuring the inner diameter D1 of the rolling bearing 40 (the inner ring 41) and the outer diameter D2 of the rolling bearing 40 (the outer ring 42) as the measuring means. And an outer diameter measuring means 52 for measuring. In this measuring device 10, when the rolling bearing 40 is placed on the receiving jig 11, the inner diameter D1 and the outer diameter D2 are automatically measured. In FIG. 1, the rolling bearing 40 and the receiving jig 11 are shown as cross sections.

[About rolling bearings to be measured]
As shown in FIG. 3, the rolling bearing 40 includes an inner ring 41, an outer ring 42, a plurality of balls (rolling elements) 43 interposed between the inner ring 41 and the outer ring 42, and the balls 43 are arranged in a circumferential direction. It has an annular retainer 44 that holds it at intervals along it. In this embodiment, the rolling bearing 40 to be measured is an angular ball bearing, and the ball 43 contacts the raceway surface 41a of the inner race 41 at a predetermined contact angle, and contacts the raceway surface 42a of the outer race 42 at a predetermined angle. Contact at a contact angle of.

  The rolling bearing 40 has a difference width δ1 between the inner ring 41 and the outer ring 42 in an assembled state in which a plurality of balls 43 are interposed between the inner ring 41 and the outer ring 42 and the balls 43 are held by the retainer 44. are doing. In the present embodiment, the difference width δ1 is a dimension in the axial direction between the side surface 48 of the inner ring 41 and the side surface 49 of the outer ring 42 in a reference state described later. In the reference state according to the present embodiment, when the inner ring 41 is installed on a horizontal plane with the center line C2 of the rolling bearing 40 in the assembled state as a vertical direction, the outer ring 42 contacts the ball 43 by its own weight, and The state 43 is in contact with the inner ring 41 (that is, a natural state in which only gravity acts). Further, the rolling bearing 40 also has the difference width δ2 on the side opposite to the side surfaces 48 and 49 in the axial direction. The difference width δ2 is a dimension in the axial direction between the side surface 46 of the inner ring 41 and the side surface 47 of the outer ring 42 in the reference state. In the illustrated form, the value of the difference width δ1 and the value of the difference width δ2 are larger than 0, but these values may be 0 or negative, and these values may be the same or different. It may be. In the case of angular contact ball bearings, the difference widths δ1 and δ2 are highly accurate with respect to design values because the side surfaces 46, 47, 48 and 49 are polished.

  In this rolling bearing 40, the outer ring 42 can be moved from the reference state with respect to the inner ring 41 in the axial direction to one side (upward in FIG. 3) at least for the minute dimension s. As described above, the outer ring 42 can move in the axial direction with respect to the inner ring 41 by a small dimension s from the reference state due to the axial internal clearance of the rolling bearing 40. Further, the value of the minute dimension s is also caused by the axial internal clearance of the rolling bearing 40. FIG. 5 is an explanatory diagram in the case where the outer ring 42 has moved to one side in the axial direction (upward in FIG. 5) for the predetermined dimension t. The broken line in FIG. 5 indicates the outer ring 42 in the reference state, and the solid line in FIG. 5 indicates the state in which the outer ring 42 has moved vertically from the reference state by a predetermined dimension t. The predetermined dimension t is a value equal to or smaller than the small dimension s (in FIG. 5, the predetermined dimension t is a value smaller than the small dimension s).

[About the measuring device 10]
The configuration of the measuring device 10 will be described with reference to FIGS. The measuring device 10 includes, in addition to the receiving jig 11, the inner diameter measuring means 51, and the outer diameter measuring means 52, a rotation actuator 53 for rotating the receiving jig 11 around the apparatus center line C0, and the receiving jig 11 in the horizontal direction. And a control device 15 including a computer device. The device center line C0 is a vertical reference line, and is positioned so that the center line C2 (see FIG. 3) of the rolling bearing 40 coincides with the jig center line C1 (see FIG. 4) of the receiving jig 11, Further, the measuring device 10 is configured so that the jig center line C1 coincides with the device center line C0 and the diameter is measured.

  The linear actuator 54 reciprocates the receiving jig 11 between the measurement zone and the evacuation zone. 1 and 2 show a state in which the receiving jig 11 is located in the measurement zone. In the measurement zone, the jig center line C1 (see FIG. 4) coincides with the apparatus center line C0. The retreat zone is a position on the left side of the measurement zone in FIG. With the receiving jig 11 in the evacuation zone, the rolling bearing 40 to be measured is set on the receiving jig 11. When the rolling bearing 40 is installed on the receiving jig 11 in the evacuation zone, the receiving jig 11 is moved from the evacuation zone to the measurement zone by the linear actuator 54, and the diameter measurement is started. At this time, a part of the inner diameter measuring means 51 has been retracted upward.

  The inner diameter measuring means 51 has a pair of inner diameter measuring elements 51a, 51a provided 180 degrees apart from the apparatus center line C0, and an actuator 51b for horizontally moving the inner diameter measuring elements 51a, 51a. . The inner diameter measuring elements 51a, 51a are lowered from the retracted position to the lower measuring position, the actuator 51b moves the inner diameter measuring elements 51a, 51a horizontally in the radial direction, and the inner diameter measuring elements 51a, 51a contact the inner peripheral surface of the inner ring 41. Let it. The inside diameter D1 can be measured by controlling the positions of the inside diameter tracing styluses 51a, 51a by the control device 15.

The outer diameter measuring means 52 includes a pair of outer diameter measuring elements 52a, 52a which are provided 180 degrees apart from the apparatus center line C, and connects the outer diameter measuring elements 52a, 52a in the radial direction (the apparatus center line C0). And an actuator 52b that moves horizontally (toward). The actuator 52b horizontally moves the outer diameter measuring elements 52a, 52a, and makes the outer diameter measuring elements 52a, 52a contact the outer peripheral surface of the outer ring 42. The position of the outer diameter tracing styluses 52a, 52a is managed by the control device 15, so that the outer diameter D2 can be measured.
The inner diameter measuring means 51 and the outer diameter measuring means 52 may be other types of measuring means.

  The rotation actuator 53 rotates the receiving jig 11 around the apparatus center line C0 when the inner diameter measuring means 51 and the outer diameter measuring means 52 measure the inner diameter D1 and the outer diameter D2 of the rolling bearing 40. This makes it possible to measure the inner diameter D1 and the outer diameter D2 at a plurality of locations, measure the average, and measure the roundness.

[About receiving jig 11]
FIG. 4 is a sectional view of the receiving jig 11 and the rolling bearing 40. The receiving jig 11 is a disc-shaped member, and has a radially inner inner receiving portion 20 and a radially outer outer receiving portion 30. In the present embodiment, the inner receiving portion 20 and the outer receiving portion 30 are integrated. The rolling bearing 40 is mounted on the receiving jig 11 such that the side surfaces 46 and 47 on one axial side of the inner ring 41 and the outer ring 42 face upward. FIG. 4 shows a state where the rolling bearing 40 is installed at a regular position of the receiving jig 11.

  The inner receiving portion 20 has an annular inner receiving surface 21 and a convex portion 22 raised from the inner receiving surface 21. The inner receiving surface 21 is a horizontal annular surface that comes into contact with the side surface 48 on the other axial side of the inner ring 41. The convex portion 22 is a portion for positioning the inner ring 41 in the radial direction, has a cylindrical shape, and fits with the inner peripheral surface 41 b of the inner ring 41. For example, the convex portion 22 and the inner ring 41 have a clearance fit relationship. By fitting the inner ring 41 to the projection 22, the center line of the inner ring 41 and the jig center line C1 of the receiving jig 11 coincide with each other, and the rolling bearing 40 is positioned in the radial direction. The inner ring 41 is placed on the inner receiving portion 20 in a state where the annular inner receiving surface 21 is in surface contact with the side surface 48 of the inner ring 41 over the entire circumference.

  The outer receiving portion 30 has an annular outer receiving surface 31. The annular outer receiving surface 31 is a horizontal annular surface that comes into contact with the side surface 49 on the other axial side of the outer ring 42. The outer receiving portion 30 has a shape that does not contact the outer peripheral surface 42 b of the outer ring 42. That is, the outer peripheral edge of the annular outer receiving surface 31 is an end of the outer receiving portion 30, and the outer receiving portion 30 does not have a portion that protrudes above the outer receiving surface 31. The outer ring 42 is placed on the outer receiving portion 30 in a state where the annular outer receiving surface 31 is in surface contact with the side surface 49 of the outer ring 42 over the entire circumference.

The inner receiving surface 21 is a surface on the first virtual horizontal plane K1. The outer receiving surface 31 is a surface on a second virtual horizontal plane K2 parallel to the first virtual horizontal plane K1. The inner receiving surface 21 and the outer receiving surface 31 are provided at different positions in the vertical direction due to a dimensional difference G defined below.
Dimension difference G: not less than the difference width δ1 (see FIG. 3) between the inner ring 41 and the outer ring 42 and not more than the sum of the difference width δ1 and the minute dimension s (see FIG. 5).
The difference width δ1 here is a design value.

  According to the receiving jig 11 having the above configuration, in order to position the rolling bearing 40, the inner ring 41 is fitted to the convex portion 22 of the inner receiving portion 20, and the inner ring 41 is attached to the inner receiving surface 21. The outer ring 42 may be placed on the outer receiving surface 31. When the outer race 42 is placed on the outer race surface 31, the outer race 30 is not in contact with the outer peripheral surface 42 b of the outer race 42, as shown in FIG. That is, in order to position and hold the rolling bearing 40 on the jig 11, in the related art (see FIG. 7), the inner peripheral surface 91 a of the inner ring 91 is fitted to the projection 98 and the outer peripheral surface 92 a of the outer ring 92 is formed. Is required to be fitted to the outer wall portion 96, but according to the present embodiment (see FIG. 4), this is not necessary, so that the work of installing the rolling bearing 40 to be measured on the jig 11 is easy. Becomes

  Further, for example, even when measuring the diameter of the rolling bearing 40 of a model number in which the inner diameter of the inner ring 41 is the same (the difference width δ1 is the same) but the outer diameter of the outer ring 42 is different (for example, the outer diameter is large). According to the receiving jig 11 of this embodiment, since the outer receiving portion 30 is not in contact with the outer peripheral surface 42b of the outer ring 42, positioning and measurement of the diameter of the rolling bearings 40 having different model numbers are possible. Becomes In other words, even if the rolling bearings 40 have the same inner diameter but different outer diameters, the positioning can be performed without replacing the receiving jig 11, and the diameter can be measured.

  And, as described above, the inner receiving surface 21 is a surface on the first virtual horizontal plane K1, and the outer receiving surface 31 is a surface on the second virtual horizontal plane K2 parallel to the first virtual horizontal plane K1. In addition, the inner receiving surface 21 and the outer receiving surface 31 have a dimensional difference G that is equal to or greater than the difference width δ1 between the inner ring 41 and the outer ring 42 and equal to or less than the sum of the difference width δ1 and the small dimension s in the vertical direction. It is provided in a different position. Therefore, when the inner ring 41 is placed on the inner receiving surface 21 and the outer ring 42 is placed on the outer receiving surface 31, the center line of each of the inner ring 41 and the outer ring 42 is oriented in a vertical direction. As a result, as shown in FIG. 1, by measuring the inner diameter D1 and the outer diameter D2 of the rolling bearing 40 from the horizontal direction by the inner measuring means 51 and the outer measuring means 52, measurement with high accuracy is possible. .

  Note that, as in the related art (see FIG. 7), the inner ring 91 contacts the horizontal receiving surface 97, but when the outer ring 92 is not in contact, the center line of the inner ring 91 is oriented vertically. However, the center line of the outer ring 92 may be slightly inclined with respect to the vertical direction (because the outer ring 92 and the outer wall portion 96 have a clearance fit). In this case, there is a high possibility that a measurement error will occur even if the outer diameter of the outer ring 92 is measured from the horizontal direction by the measuring means (51, 52).

  The dimensional difference G may be the same as the difference width δ1 between the inner ring 41 and the outer ring 42 (G = δ1), but in the present embodiment, is larger than the difference width δ1 and smaller than the difference width δ1. It is less than or equal to the sum of the minute dimensions s (δ1 + s ≧ G> δ1). That is, the inner receiving surface 21 and the outer receiving surface 31 are provided at different positions in the axial direction with a dimensional difference G larger than the difference width δ1 and equal to or smaller than the sum of the difference width δ1 and the minute dimension s. I have. For this reason, it is possible to cope with the rolling bearing 40 having a variation in the accuracy of the difference width δ1 (a variation that is larger than a design value). Further, even when the rolling bearing 40 of a model number having a slightly larger difference width δ1 than that of the rolling bearing 40 previously measured is to be measured, the receiving jig 11 does not need to be replaced.

  Further, since the annular groove 25 is formed between the inner receiving surface 21 and the outer receiving surface 31, even if the model number of the rolling bearing 40 is changed, these inner receiving surface 21 and the outer receiving surface 31 are changed. 31 function independently of each other. That is, only the inner ring 41 can be placed on the inner receiving surface 21, and the outer ring 42 cannot be placed on the inner receiving surface 21. Then, only the outer ring 42 can be placed on the outer receiving surface 31, and the inner ring 41 cannot be placed on the outer receiving surface 31.

FIG. 5 shows a case where the rolling bearing 40 to be measured is placed on the receiving jig 11 so that the outer ring 42 moves in one axial direction for a predetermined dimension t. That is, in FIGS. 4 and 5, the inner receiving surface 21 and the outer receiving surface 31 are provided at different positions in the axial direction with a dimensional difference G slightly larger than the difference width δ1 of the rolling bearing 40. In a state in which the inner ring 41 comes into contact with the inner receiving surface 21 on the surface and the outer ring 42 comes into contact with the outer receiving surface 31 on the surface, as shown in FIG. 5, the outer ring 42 moves upward from the reference state. This movement amount (displacement amount) corresponds to the difference (G-δ1) between the dimensional difference G and the difference width δ1.
The rolling bearing 40 placed on the receiving jig 11 is located in the measurement zone in this state, and the diameters are measured by the measuring means 51 and 52 (see FIG. 1). In the measurement zone, the center line C1 of the jig coincides with the center line C0 of the device, so that the radial positioning of the inner ring 41 of the rolling bearing 40 becomes accurate with respect to the center line C0 of the device, enabling highly accurate measurement. Becomes As shown in FIG. 5, the outer ring 42 has a clearance formed in the radial direction, and the outer diameter measuring means 52 includes a pair of outer diameter measuring elements provided at 180 degrees apart from the center line C of the apparatus. 52a, 52a, which are brought into close contact with the outer peripheral surface of the outer race 42, so that highly accurate measurement is possible. Further, since the rolling bearing 40 can be rotated by the rotary actuator 53, the receiving jig 11 is rotated together with the rolling bearing 40 while the pair of outer diameter measuring elements 52a, 52a are in contact with the outer ring 42, so that the outer ring is rotated. Measurement with high accuracy is also possible for 42.

  If the difference (G-δ1) between the dimensional difference G and the difference width δ1 is reduced, the clearance is reduced, and the outer ring 42 can be positioned more precisely. The difference (G-δ1) needs to be equal to or larger than zero (or larger than zero), so that the inner ring 41 comes into contact with the inner receiving surface 21 and the outer ring 42 comes into contact with the outer receiving surface 31. The rolling bearings 40 are brought into contact with each other, and the rolling bearing 40 is held by the receiving jig 11 at the regular position.

[Another form of receiving jig 11]
FIG. 6 is a cross-sectional view showing a state where the rolling bearing 40 is mounted on a receiving jig 11 of another embodiment. When the embodiment shown in FIG. 6 is compared with the embodiment shown in FIG. 4, the receiving jig 11 is different, but other configurations are the same. The receiving jig 11 shown in FIG. 4 is a jig in the case where the side surfaces 46 and 47 of the rolling bearing 40 are placed with the side facing upward, while the receiving jig 11 shown in FIG. This is a jig for mounting in an upward direction. FIG. 6 shows a state where the rolling bearing 40 is installed at a regular position of the receiving jig 11.

In the rolling bearing 40 mounted on the receiving jig 11 shown in FIG. 6, the inner ring 41 can be moved at least in the axial direction (in the case of FIG. 6) at least a small dimension s from the reference state with respect to the outer ring 42. In the reference state in the present embodiment, the inner ring 41 contacts the ball 43 by its own weight when the outer ring 42 is installed on a horizontal surface with the center line C2 of the rolling bearing 40 in the assembled state as a vertical direction, and the ball 43 A state 43 is in contact with the outer ring 42 (that is, a natural state in which only gravity acts).
As described above, in the rolling bearing 40, the inner ring 41 can move in the axial direction with respect to the outer ring 42 by a small dimension s from the reference state due to the axial internal clearance of the rolling bearing 40. Further, the value of the minute dimension s is also caused by the axial internal clearance of the rolling bearing 40. In the case of the rolling bearing 40, the difference width δ2 is provided between the side surface 46 and the side surface 47 as described above (see FIG. 3). In the present embodiment, the difference width δ2 is a dimension in the axial direction between the side surface 46 of the inner race 41 and the side surface 47 of the outer race 42 in the reference state.

  The receiving jig 11 is a disc-shaped member, and has a radially inner inner receiving portion 20 and a radially outer outer receiving portion 30. The rolling bearing 40 is mounted on the receiving jig 11 such that the side surfaces 48 and 49 on one axial side of the inner ring 41 and the outer ring 42 face upward.

The outer receiving portion 30 has an annular outer receiving surface 31 and an annular outer wall portion 32 raised from the outer receiving surface 31. The annular outer receiving surface 31 is a horizontal annular surface that contacts the side surface 47 on the other axial side of the outer ring 42.
The annular outer wall portion 32 is a portion for positioning the outer ring 42 in the radial direction, has an annular shape, and is fitted to the outer peripheral surface 42b of the outer ring 42. For example, the outer wall portion 32 and the outer ring 42 have a clearance fit relationship. When the outer ring 42 is fitted to the outer wall portion 32, the center line of the outer ring 42 matches the jig center line C1 of the receiving jig 11, and the rolling bearing 40 is positioned in the radial direction. The outer ring 42 is placed on the outer receiving portion 30 in a state where the annular outer receiving surface 31 is in surface contact with the side surface 47 of the outer ring 42 over the entire circumference.

  The inner receiving portion 20 has an annular inner receiving surface 21. The inner receiving surface 21 is a horizontal surface that contacts the side surface 46 on the other side in the axial direction of the inner ring 41. The inner receiving surface 21 is a circular horizontal surface, and the upper surface of the peripheral portion contacts the side surface 46. The inner receiving portion 20 does not have a portion projecting above the inner receiving surface 21. As a result, the inner receiving portion 20 comes into non-contact with the inner peripheral surface 41b of the inner race 41. The inner ring 41 is placed on the inner receiving portion 20 in a state where the annular inner receiving surface 21 is in surface contact with the side surface 46 of the inner ring 41 over the entire circumference.

The inner receiving surface 21 is a surface on the first virtual horizontal plane K1. The outer receiving surface 31 is a surface on a second virtual horizontal plane K2 parallel to the first virtual horizontal plane K1. The inner receiving surface 21 and the outer receiving surface 31 are provided at different positions in the vertical direction due to a dimensional difference G defined below.
Dimensional difference G: not less than the difference width δ2 (see FIG. 3) between the inner ring 41 and the outer ring 42 and not more than the sum of the difference width δ2 and the minute dimension s.
The difference width δ2 here is a design value.

  According to the receiving jig 11, in order to position the rolling bearing 40, the outer ring 42 is fitted to the annular outer wall portion 32 of the outer receiving portion 30, and the outer ring 42 is placed on the outer receiving surface 31, and the inner ring 41 is placed. On the inner receiving surface 21. When the inner ring 41 is placed on the inner receiving surface 21, the inner receiving portion 20 is not in contact with the inner peripheral surface 41 b of the inner ring 41 as shown in FIG. That is, in order to position and hold the rolling bearing 40 on the jig 11, in the related art (see FIG. 7), the outer peripheral surface 92 a of the outer ring 92 is fitted to the outer wall portion 96, and the inner peripheral surface 91 a of the inner ring 91 is formed. Has to be fitted to the convex part 98, but according to the present embodiment (see FIG. 6), this is not necessary, so that the work of installing the rolling bearing 40 to be measured on the jig 11 is easy. Becomes

  Further, for example, even when measuring the diameter of the rolling bearing 40 of the model number in which the outer diameter of the outer ring 42 is the same (the difference width δ2 is the same) but the inner diameter of the inner ring 41 is different (for example, the inner diameter is small), According to the receiving jig 11 of the present embodiment, since the inner receiving portion 20 is not in contact with the inner peripheral surface 41b of the inner ring 41, positioning and measurement of the diameter of the rolling bearings 40 having different model numbers are possible. Becomes In other words, even if the rolling bearings 40 have the same outer diameter but different inner diameters, the positioning can be performed without replacing the receiving jig 11, and the diameter can be measured.

  And, as described above, the inner receiving surface 21 is a surface on the first virtual horizontal plane K1, and the outer receiving surface 31 is a surface on the second virtual horizontal plane K2 parallel to the first virtual horizontal plane K1. The inner receiving surface 21 and the outer receiving surface 31 have a dimensional difference G that is equal to or larger than the difference width δ2 between the inner ring 41 and the outer ring 42 and equal to or smaller than the sum of the difference width δ2 and the small dimension s in the vertical direction. It is provided in a different position. Therefore, when the inner ring 41 is placed on the inner receiving surface 21 and the outer ring 42 is placed on the outer receiving surface 31, the center lines of the inner ring 41 and the outer ring 42 are oriented in the vertical direction and positioned. As a result, as shown in FIG. 1, by measuring the inner diameter D1 and the outer diameter D2 of the rolling bearing 40 from the horizontal direction by the inner measuring means 51 and the outer measuring means 52, measurement with high accuracy is possible. .

  The dimensional difference G may be the same as the difference width δ2 between the inner ring 41 and the outer ring 42 (G = δ2), but in the present embodiment, is larger than the difference width δ2 and smaller than the difference width δ2. It is equal to or less than the sum of the minute dimensions s (δ2 + s ≧ G> δ2). That is, the inner receiving surface 21 and the outer receiving surface 31 are provided at different positions in the axial direction with a dimensional difference G larger than the difference width δ2 and equal to or smaller than the sum of the difference width δ2 and the minute size s. I have. For this reason, it is possible to cope with the rolling bearing 40 having a variation in the accuracy of the difference width δ2 (a variation that is larger than a design value). Further, even when the rolling bearing 40 of a model number having a slightly larger difference width δ2 than that of the rolling bearing 40 previously measured is to be measured, the receiving jig 11 does not need to be replaced.

  Further, since the annular groove 25 is formed between the inner receiving surface 21 and the outer receiving surface 31, even if the model number of the rolling bearing 40 is changed, these inner receiving surface 21 and the outer receiving surface 31 are changed. 31 function independently of each other. That is, only the inner ring 41 can be placed on the inner receiving surface 21, and the outer ring 42 cannot be placed on the inner receiving surface 21. Then, only the outer ring 42 can be placed on the outer receiving surface 31, and the inner ring 41 cannot be placed on the outer receiving surface 31.

[About the measuring device 10 including the receiving jig 11 of each of the above forms]
As described above, according to the measuring device 10 including the receiving jigs 11 of the above-described embodiments, the work of installing the rolling bearings 40 to be measured on the receiving jigs 11 becomes easy. Further, in the case of the receiving jig 11 shown in FIG. 4, even if the rolling bearings 40 have the same inner diameter but different outer diameters, the positioning can be performed without replacing the receiving jig 11. In the case of the receiving jig 11 shown in FIG. 6, even if the rolling bearings 40 have the same outer diameter but different inner diameters, the positioning can be performed without replacing the receiving jig 11. For this reason, it can contribute to the efficiency of the measurement operation. As a result, the productivity of the rolling bearing 40 can be increased.

  Further, according to the receiving jig 11 of each of the above embodiments, it is possible to measure the axial dimension of the inner ring 41 with the inner receiving surface 21 as a reference, and the axial direction of the outer ring 42 with the outer receiving surface 31 as a reference. Dimensions can be measured and these dimensions can be measured accurately. For this purpose, the measuring device 10 needs to be provided with separate measuring means for measuring these axial dimensions.

The measuring device 10 of the embodiment can measure both the inner diameter D1 and the outer diameter D2 of the rolling bearing 40, but may be a device that measures only one of the inner diameter D1 and the outer diameter D2. That is, the receiving jig 11 can be applied to the measuring device 10 for measuring the diameter of the rolling bearing 40.
Further, according to the measuring device 10 of the embodiment, the roundness of the inner peripheral surface 41b of the inner race 41 and the outer peripheral surface 42b of the outer race 42 can be measured.

The embodiments disclosed above are illustrative in all aspects and not restrictive. That is, the measuring device of the present invention is not limited to the illustrated embodiment, but may be another embodiment within the scope of the present invention.
In the above-described embodiment, the case has been described in which the measuring means (51, 52) performs automatic measurement when the rolling bearing 40 is placed on the receiving jig 11. However, the receiving jig 11 is not limited to such automatic measurement. It may be used in applications. In other words, the worker places the receiving jig 11 in which the rolling bearing 40 to be measured is set at the normal position at a predetermined position of the measuring device 10 and the measuring means (the inner diameter measuring means 51 and the outer diameter measuring means 51). A measuring device for measuring the diameter of the rolling bearing 40 by operating the means 52) may be used.
Further, in the above-described embodiment, the case where the rolling bearing 40 to be measured is an angular ball bearing has been described. However, a deep groove ball bearing or the like may be used.

10: Measuring device 11: Receiving jig 20: Inner receiving portion 21: Annular inner receiving surface 22: Convex portion 30: Outer receiving portion 31: Annular outer receiving surface 32: Outer wall portion 40: Rolling bearing 41: Inner ring 41b: Inner peripheral surface 42: Outer ring 42b: Outer peripheral surface 46, 47, 48, 49: Side surface 51: Inner diameter measuring means (measuring means) 52: Outer diameter measuring means (measuring means)
D1: inner diameter D2: outer diameter G: dimensional difference K1: first virtual horizontal plane K2: second virtual horizontal plane s: minute dimension δ1: difference width δ2: difference width

Claims (4)

A measuring device for measuring a diameter of a rolling bearing in which an outer ring is movable in a small dimension in an axial direction from a reference state with respect to an inner ring,
A receiving jig for holding the rolling bearing mounted thereon, and a measuring unit for measuring a diameter of the rolling bearing held by the receiving jig,
The receiving jig,
An annular inner receiving surface that abuts the side surface on the other side in the axial direction of the inner ring, and an inner receiving portion that has a convex portion for fitting the inner peripheral surface of the inner ring and positioning the inner ring in the radial direction,
An outer receiving portion that has an annular outer receiving surface that is in contact with the side surface on the other axial side of the outer ring, and that is not in contact with the outer peripheral surface of the outer ring;
Has,
The inner receiving surface is a surface on a first virtual horizontal plane, and the outer receiving surface is a surface on a second virtual horizontal plane parallel to the first virtual horizontal plane, and the inner receiving surface and the outer receiving surface The measuring device, wherein the surface is provided at a position different in the vertical direction by a dimensional difference not less than the difference width between the inner ring and the outer ring and not more than the sum of the difference width and the minute dimension.   The inner receiving surface and the outer receiving surface are provided at different positions in the axial direction with a dimensional difference that is larger than the difference width between the inner ring and the outer ring and is equal to or less than the sum of the difference width and the minute dimension. The measuring device according to claim 1. A measuring device for measuring the diameter of a rolling bearing in which an inner ring is movable in a small dimension in an axial direction from a reference state with respect to an outer ring,
A receiving jig for holding the rolling bearing mounted thereon, and a measuring unit for measuring a diameter of the rolling bearing held by the receiving jig,
The receiving jig,
An annular outer receiving surface that abuts the side surface on the other side in the axial direction of the outer ring, and an outer receiving portion that has an annular outer wall portion that fits with the outer peripheral surface of the outer ring and radially positions the outer ring.
An inner receiving portion that has an annular inner receiving surface that abuts on the other axial side surface of the inner ring, and that is not in contact with the inner peripheral surface of the inner ring;
Has,
The inner receiving surface is a surface on a first virtual horizontal plane, and the outer receiving surface is a surface on a second virtual horizontal plane parallel to the first virtual horizontal plane, and the inner receiving surface and the outer receiving surface The measuring device, wherein the surface is provided at a position different in the vertical direction by a dimensional difference not less than the difference width between the inner ring and the outer ring and not more than the sum of the difference width and the minute dimension.   The inner receiving surface and the outer receiving surface are provided at different positions in the axial direction with a dimensional difference that is larger than the difference width between the inner ring and the outer ring and is equal to or less than the sum of the difference width and the minute dimension. The measuring device according to claim 3.

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