JP5178270B2 - Tapered roller bearing cage pocket clearance measuring device and measuring method thereof - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cage pocket clearance dimension measuring device for a tapered roller bearing for measuring a cage pocket clearance dimension which is a dimension of a clearance between a cage and a tapered roller in a tapered roller bearing, and a measuring method thereof.

  For example, in the tapered roller bearing 1 as shown in FIG. 1, the cage 5 is in a neutral position with respect to the inner ring 2 and the outer ring 3 in the bearing so as not to disturb the behavior of the tapered roller 4 in the pocket 5 a of the cage 5. In this state, as shown in FIG. 2, it is designed so that an appropriate clearance 6 is formed between the cage 5 and the tapered roller 4. If the clearance 6 is too small, the smooth movement of the tapered roller 4 is hindered. On the other hand, even if the clearance 6 is too large, the swing of the cage 5 itself becomes large, which adversely affects the function of the bearing. Therefore, when manufacturing the cage 5, it is necessary to confirm that the cage pocket clearance dimension S, which is the dimension of the clearance 6 between the cage 5 and the tapered roller 4, is within an appropriate range. Here, the neutral position of the cage 5 means that the tapered roller 4 is disposed in a state where the tapered roller 4 is in contact with the raceway surface 2a and the large collar 2b of the inner ring 2, and the tapered roller 4 is coaxial with the inner ring 2. 4 is a position where it is brought into contact with the small diameter side end face 4b.

Conventionally, the measurement of the cage pocket clearance dimension S has conventionally been performed by the method described below. That is, as shown in FIG. 10, the tapered roller 4 whose dimension of each part is an accurate model is incorporated in each pocket 5a of the cage 5, and any of the inscribed circle diameter Di and the circumscribed circle diameter Do of each tapered roller 4 is set. Or measuring both. When the cage pocket clearance dimension S changes, the radial position of the tapered roller 4 also changes. Therefore, the cage pocket clearance dimension S is determined by measuring the inscribed circle diameter Di and the circumscribed circle diameter Do of each tapered roller 4. It is required.
JP-A-11-166543

  The above conventional cage pocket clearance measurement method measures the inscribed circle diameter D1 or the circumscribed circle diameter D2 while visually confirming the position of the edge portion on the small diameter side or the large diameter side of the exemplary tapered roller 4. Therefore, accurate measurement is not easy, and skill is required for measurement. Nevertheless, in the case of a tapered roller bearing having an even number of tapered rollers 4, as shown in FIG. 10, there is a pair of tapered rollers 4 at positions facing each other across the center line. It is relatively easy to measure the diameter Di and the circumscribed circle diameter Do. However, in the case of a tapered roller bearing in which the number of tapered rollers 4 is an odd number, the pair of tapered rollers 4 do not exist at positions facing each other across the center line, and therefore the inscribed circle diameter Di and the circumscribed circle diameter Do can be measured. It becomes even more difficult.

  In addition, the conventional measuring method of the cage pocket clearance is to measure the inscribed circle diameter Di and the circumscribed circle diameter Do at the small diameter side or large diameter side edge part of the tapered roller 4, so that the edge part is Chamfered mass production type tapered rollers cannot be used for measurement. Therefore, for measurement, a tapered roller whose edge is not chamfered and a retainer for the tapered roller must be prepared.

  The present invention has been made under the above-described background, and an object of the present invention is to provide an apparatus and a method for easily measuring the cage pocket clearance dimension of a tapered roller bearing, which is easy to measure, and a simple configuration. It is to be.

  A cage pocket clearance size measuring device for a tapered roller bearing according to the present invention includes a ring-shaped cage having pockets at a plurality of locations in a circumferential direction, and a plurality of tapered rollers held in each pocket of the cage. In the tapered roller bearing in which the width of the outer diameter edge of the pocket is narrower than the diameter of the tapered roller, a device for measuring a cage pocket clearance dimension which is a dimension of a clearance between the cage and the tapered roller, A support means for supporting the cage and the roller assembly made of tapered rollers separated from the tapered roller bearing, and an inner periphery of the tapered roller row of the cage / roller assembly supported by the support means And a measuring jig in which the tapered outer peripheral surface is in contact with the rolling surface of each tapered roller, and an axial position measuring means for measuring the axial position of the measuring jig. To.

According to the cage pocket clearance measuring apparatus having this configuration, the support means supports the cage separated from the tapered roller bearing and the cage / roller assembly including the tapered roller. A measuring jig is arranged on the inner periphery of the tapered roller row so that the tapered outer peripheral surface is in contact with the rolling surface of each tapered roller located at the small diameter side end of each pocket of the cage. Then, the axial position of the measuring jig is measured by the axial position measuring means. Measuring the axial position of the measuring jig is easier than measuring the inscribed circle diameter and circumscribed circle diameter of each tapered roller.
If the radial position of the tapered roller is different, the axial position of the measuring jig is also changed in proportion thereto. Therefore, the relationship between the radial position of the tapered roller and the axial position of the measuring jig is mathematically expressed, and the measurement result of the axial position measuring means is substituted into the mathematical expression to obtain the cage pocket clearance dimension. Can do. Alternatively, the relationship between the radial position of the tapered roller and the axial position of the measuring jig is displayed in the correlation table, and the measurement result of the axial position measuring means is collated with the correlation table, so that the cage pocket The clearance dimension can be obtained.
In this way, the cage pocket clearance dimension is obtained by measuring the axial position of the measuring jig, so the pocket clearance dimension can be accurately measured regardless of whether the number of tapered rollers is even or odd. is there. Further, the cage pocket clearance dimension measuring device can be configured simply.

Specifically, there are the following two methods for measuring the axial position of the measuring jig. The first is to measure the axial reference position of the measuring jig using a reference product of a cage / roller assembly whose cage pocket clearance is known in advance, and then, This is a method of measuring the axial relative position of the measurement jig with respect to the reference product using a roller assembly. In this case, the sum of the axial reference position and the axial relative position becomes the axial position of the measuring jig. The other is a method of directly measuring the axial position of the measuring jig for each product to be measured.
The former method requires a standard product of the cage and roller assembly, but otherwise the measurement can be performed if the outer peripheral surface shape of the measuring jig is accurately grasped. The design etc. are simple. The latter method does not require preparation of a cage / roller assembly reference product, but it is necessary to maintain high processing accuracy for each part of the cage pocket clearance dimension measuring device. Design and handling are difficult compared to the former. These two methods are preferably used in accordance with the type of tapered roller bearing to be used and various situations.

In the present invention, the measuring jig can have a generatrix of the outer peripheral surface thereof convex to the rolling surface of the tapered roller.
Usually, the shape of the pocket of the cage is matched to the tapered shape of the rolling surface of the tapered roller, and the inner wall surface of the pocket and the rolling surface of the tapered roller are in line contact. Therefore, if the measuring jig hits the tapered roller at one point, the tapered roller is pressed against the inner wall surface of the pocket. Therefore, it is possible to use a measuring jig in which the bus bar on the outer peripheral surface is convex with respect to the rolling surface of the tapered roller. If the bus on the outer peripheral surface of the measuring jig is convex with respect to the rolling surface of the tapered roller, use the same measuring jig to set the cage pocket clearance for tapered roller bearings with different inner ring taper angles. Can be measured.

In this invention, you may provide the pressing means which presses the said tapered roller to the small diameter side of the said holder | retainer.
When the pressing means is provided, the tapered roller is always pressed against the small diameter side of the cage regardless of gravity, so that the cage pocket clearance size measuring device can be used in any posture.

The measuring jig can be made of ceramic.
In the case of a cage having a large diameter, the diameter of the measuring jig used for measuring the cage pocket clearance dimension is also increased. Since the measuring jig having a large diameter is heavy, there is a possibility that the cage is bent and deformed by the weight. If the measurement jig is made of a light and hard material such as ceramic, the influence on the cage can be reduced while maintaining the strength of the measurement jig.

When the retainer / roller assembly is provided with a retainer mount for placing the retainer / roller assembly in contact with the end surface on the small diameter side of the retainer, the retainer mount is a rolling surface of each tapered roller. You may have the jig insertion space in which the location which protrudes from the end surface by the side of the small diameter of the said holder | retainer of the measuring jig which touches is inserted.
When the cage mount has a jig insertion space, a measurement jig that is long in the axial direction can be used. When the measuring jig is long in the axial direction, the change width of the diameter of the tapered outer peripheral surface can be widened, so that the cage pocket clearance dimension can be measured for cages of various diameters.

The cage pocket clearance dimension measuring method of the tapered roller bearing according to the present invention includes a ring-shaped cage having pockets at a plurality of locations in the circumferential direction, and a plurality of tapered rollers held in each pocket of the cage. In the tapered roller bearing in which a width of an outer diameter edge of the pocket is narrower than a diameter of the tapered roller, a method for measuring a cage pocket clearance dimension which is a dimension of a clearance between the cage and the tapered roller,
The cage and the roller assembly comprising the cage and the tapered roller are taken out from the tapered roller bearing, and a tapered outer circumferential surface is provided on the inner circumference of the tapered roller row of the cage / roller assembly. A measuring jig in contact with the moving surface is arranged, an axial position of the measuring jig is measured, and the cage pocket clearance dimension is obtained from the measurement result.

When the measuring jig is arranged on the inner periphery of the tapered roller row of the cage / roller assembly, if the radial position of the tapered roller is different, the axial position of the measuring jig is also proportionally different. Therefore, by formulating the relationship between the radial position of the tapered roller and the axial position of the measuring jig, and substituting the measurement result obtained by measuring the axial position of the measuring jig into the mathematical expression, the cage pocket The clearance dimension can be obtained. Alternatively, the relationship between the radial position of the tapered roller and the axial position of the measuring jig is displayed in the correlation table, and the measurement results obtained by measuring the axial position of the measuring jig are collated with the correlation table. The cage pocket clearance can be determined.
Thus, since the cage pocket clearance dimension is obtained by measuring the axial position of the measuring jig, the pocket clearance dimension can be accurately measured regardless of the number of tapered rollers. Moreover, since the measurement of the axial position of the measuring jig is easier than the measurement of the inscribed circle diameter and the circumscribed circle diameter of each tapered roller, the measurement of the cage pocket clearance dimension by this method is easy.

  The cage pocket clearance dimension measuring apparatus for tapered roller bearings of the present invention comprises a ring-shaped cage having pockets at a plurality of locations in the circumferential direction, and a plurality of tapered rollers held in each pocket of the cage, An apparatus for measuring a cage pocket clearance dimension, which is a dimension of a clearance between the cage and the tapered roller, in a tapered roller bearing in which a width of an outer diameter edge of the pocket is narrower than a diameter of the tapered roller, A support means for supporting the cage / roller assembly comprising the cage and tapered rollers separated from the roller bearings, and an inner circumference of the tapered roller array of the cage / roller assembly supported by the support means The tapered outer peripheral surface is in contact with the rolling surface of each tapered roller and the axial position measuring means for measuring the axial position of the measuring jig. Cage pocket clearance dimensions of receiving can accurately measure, easy measurement, configuration is simple.

  The cage pocket clearance dimension measuring method of the tapered roller bearing of the present invention comprises a ring-shaped cage having pockets at a plurality of locations in the circumferential direction, and a plurality of tapered rollers held in each pocket of the cage, In a tapered roller bearing in which a width of an outer diameter edge of the pocket is narrower than a diameter of the tapered roller, a method for measuring a cage pocket clearance dimension which is a clearance dimension between the retainer and the tapered roller, the taper Remove the cage and the roller assembly composed of the cage and the tapered roller from the roller bearing, and a tapered outer circumferential surface is a rolling surface of each tapered roller on the inner circumference of the tapered roller row of the cage / roller assembly. A measuring jig in contact with the measuring tool, measuring the axial position of the measuring jig, and obtaining the cage pocket clearance dimension from the measurement result, the cage pocket of the tapered roller bearing The KOR dimensions can be measured accurately, is easy measurement.

The cage pocket clearance dimension measuring device for measuring the cage pocket clearance dimension of the tapered roller bearing shown in FIGS. 1 and 2 will be described below. In FIG. 1, a tapered roller bearing 1 includes an inner ring 2, an outer ring 3, a plurality of tapered rollers 4 interposed between the inner and outer rings 2 and 3, and a cage 5 that holds the tapered rollers 4. . The inner ring 2 has a raceway surface 2a formed of a conical surface on the outer periphery, and has a large brim 2b on the large diameter side of the raceway surface 2a and a small brim 2c on the small diameter side. The outer ring 3 is formed with a raceway surface 3a opposite to the raceway surface 2a of the inner ring 2 on the inner periphery, and has no collar. The outer periphery of the tapered roller 4 is formed as a rolling surface 4a, and is freely rollable between both the raceway surfaces 2a and 3a. Each tapered roller 4 is placed in a pocket 5a of the cage 5, and is held at a predetermined interval in the circumferential direction.
As shown in FIG. 2, the width b of the outer diameter edge of the cage pocket 5a is narrower than the diameter d of the tapered roller 4 in any cross section so that the tapered roller 4 does not come out to the outer diameter side. Further, a chamfer 7 is provided at the inner diameter side corner portion of the column portion 5 b of the cage 5 substantially in parallel with the tangent to the outer peripheral surface of the tapered roller 4.

  FIG. 3 is a diagram showing a schematic configuration of the cage pocket clearance dimension measuring device. This cage pocket clearance size measuring device 10 includes a support means 12 for supporting a cage / roller assembly 11 in which the tapered roller 4 and the cage 5 are taken out from the tapered roller bearing 1, and the support means 12. It has a measuring jig 13 arranged on the inner circumference of four rows of tapered rollers of the supported cage / roller assembly 11 and an axial position measuring means 14 for measuring the axial position of the measuring jig 13.

  In this embodiment, the support means 12 is a retainer platform installed on the floor surface F, and the retainer platform has an upper surface 12a formed horizontally. The cage / roller assembly 11 is supported in a state where the end surface 5b on the small diameter side of the cage 5 is in contact with the upper surface 12a of the cage mount. In this supported state, each tapered roller 4 is positioned at the small diameter side end of the pocket 5a of the cage 5 by gravity.

  The measuring jig 13 has a truncated cone shape with a tapered lower side, and an outer peripheral surface 13 a is formed in a tapered shape in contact with the rolling surface 4 a of each tapered roller 4 of the cage / roller assembly 11. . As a material for the measuring jig 13, a relatively light and hard ceramic is suitable. In the case of the cage 5 having a large diameter, the diameter of the measuring jig 13 is also increased. Since the measuring jig 13 having a large diameter is heavy, the cage 5 may be bent and deformed by the weight. If the measurement jig 13 is made of a light and hard material such as ceramic, the influence on the cage 5 can be reduced while maintaining the strength of the measurement jig 13.

As the axial direction position measuring means 14, for example, a micrometer or a laser length measuring device can be used. There are the following two methods for measuring the axial position of the measuring jig 13 by the axial position measuring means 14. First, as shown in FIG. 5A, using a reference product 11A of a cage / roller assembly whose cage pocket clearance dimension is known in advance, the axial reference position l _{0 of} the measuring jig 13, For example, the axial distance between the small-diameter side end of the cage 5 and the large-diameter side end of the measuring jig 13 is measured, and thereafter, as shown in FIG. using the assembly 11B, a method of measuring the relative axial position [delta] ₂ with respect to the reference article 11A of the measuring jig 13. In this case, the sum of the axial reference position l ₀ and the axial relative position δ ₂ becomes the axial position l of the measuring jig (l = l ₀ + δ ₂ ). The other is a method of directly measuring the axial position l of the measuring jig 13 by using a cage / roller assembly 11B, which is an object to be measured, as shown in FIG.

  The method of FIG. 5 requires the reference product 11A of the cage / roller assembly, but otherwise, the measurement can be performed if the outer peripheral surface shape of the measuring jig 13 is accurately grasped. The design and the like of the dimension measuring device 10 are simple. The method shown in FIG. 6 does not require creation of the reference product 11A of the cage / roller assembly, but it is necessary to keep the processing accuracy of each part of the cage pocket clearance measuring device 10 high. The measurement device 10 is difficult to design and handle compared to the former. These two methods are preferably used in accordance with the type of tapered roller bearing to be used and various situations.

The principle of this cage pocket clearance dimension measuring device 10 will be described by taking as an example the case where the axial position of the measuring jig 13 is measured by the method of FIG. FIG. 4 is a partially enlarged view of the cage pocket clearance dimension measuring device 10 at that time. Here, determine the bore diameter Di and the circumscribed circle diameter reference value and the cage pocket clearance dimension of the diameter corresponding to half the direction S _R of the difference between the maximum value of Do of the tapered rollers 4.
When the cage 5 is in a neutral position, that is, after the tapered roller 4 is placed in contact with the raceway surface 2a and the large collar 2b of the inner ring 2, the cage 5 is coaxial with the inner ring 2 and has a small diameter. When arranged in a state where it is in contact with the side end face 4b, the inscribed circle diameter Di and the circumscribed circle diameter Do indicate reference values. When the tapered roller 4 is moved from the neutral position until the rolling surface 4a hits the inner wall surface of the cage pocket 5a while the cage 5 is pressed against the small-diameter side end surface 4b of the tapered roller 4, the inscribed circle diameter Di is reached. And the circumscribed circle diameter Do becomes the maximum value.

If the cage pocket clearance dimension S _R in the radial direction of the cage-roller assembly 11 to be measured product, the radial cage pocket clearance dimensions of the cage-roller assembly of the reference products (not shown) It is assumed that it is larger than δ. At this time, the tapered roller 4 is at a position moved outwardly by [delta] ₁ from the original contact position 15 between the inner wall surface of the pocket 5a, stationary in contact with the inner wall surface of the pocket 5a. It is assumed that the measuring jig 13 is moved by δ _{2 in the} axial direction along with the movement of the tapered roller 4. When the moving amount of the tapered roller 4 is δ ₁ , the moving amount in the vertical direction (axial direction) and the horizontal direction of the tapered roller 4 is δ ₁ sin (α ₁ + α ₂ ) and δ ₁ cos (α ₁ + α ₂ ), respectively. It is. Here, α ₁ is the taper angle of the rolling surface 4 a of the tapered roller 4, and α ₂ is the taper angle of the inner ring 1. At this time, the movement amount δ ₂ of the measuring jig 13 in the axial direction and the movement amount δ ₁ of the tapered roller 4 have the relationship of Equation 1.

However, in Equation 1, the first term is the amount of axial movement of the measuring jig 13 due to the axial movement of the tapered roller 4, and the second term is the amount of axial movement of the measuring jig 13 due to the horizontal movement of the tapered roller 4. is there. When this is solved for δ ₁ , Equation 2 is obtained.

Further, among the moving amount δ ₁ of the tapered roller 4, the horizontal moving amount corresponds to the radial cage pocket clearance increment δ, and therefore, the relationship of Expression 3 is established.

From this and Expression 2, the relational expression of δ and δ ₂ is as shown in Expression 4.

Here, since α ₁ and α ₂ are constants, δ and δ ₂ are in a proportional relationship. From this relationship, the increment δ of the cage pocket clearance in the radial direction can be calculated from the axial movement amount δ ₂ of the measuring jig 13. For example, when α ₁ = 2 ° and α ₂ = 8.9528 °, δ = 0.1529δ ₂ , and the axial movement amount δ ₂ of the measuring jig 13 is the increment δ of the radial cage pocket clearance. It can be said that it was amplified 6.5 times. Thus, to determine the increment [delta] of the cage pocket clearance of the amplified axial movement amount [delta] ₂ measurement to the radial direction of the measuring jig 13, the dimensions of the cage pocket clearance S _R in the radial direction accurately Can be measured. Cage pocket clearance dimension S _R in the radial direction of the cage-roller assembly 11 to be measured product, the radially of the cage pocket clearance dimensions of the cage-roller assembly of the reference products (not shown) The increment δ is added.

Instead of calculating using the formula 2 for each cage / roller assembly 11 to be measured, the relationship between the axial movement amount δ ₂ of the measuring jig 13 and the increment δ of the radial cage pocket clearance is expressed as follows: It is displayed on a correlation table (not shown), and the axial movement amount δ ₂ of the measuring jig 13 measured by the axial position measuring means 14 is collated with the correlation table, whereby a radial cage pocket is obtained. The clearance increment δ may be obtained.
Alternatively, the axial position of the measuring jig 13 may be measured by the method shown in FIG. 6, and the radial cage pocket clearance dimension may be obtained from the measurement result.

The relationship between the vertical cage pocket clearance dimension S (FIG. 2) with respect to the inner wall surface of the radial cage pocket clearance dimension S _R and the pocket 5, generally in order to closely related to the shape of the bearing and the cage 5 it is difficult to formalized but, by obtaining the cage pocket clearance dimension S _R in the radial direction, it is possible to know the approximate cage pocket clearance dimension S.

FIG. 7 is a diagram showing a different example of the measuring jig 13. In the measuring jig 13, the bus bar of the outer peripheral surface 13 a is convex with respect to the rolling surface 4 a of the tapered roller 4. Normally, the shape of the pocket 5a of the cage 5 is matched to the tapered shape of the rolling surface 4a of the tapered roller 4, and the inner wall surface of the pocket 5a and the rolling surface 4a of the tapered roller 4 are in line contact. Therefore, as long as the measuring jig 13 hits the tapered roller 4 at one point P, the tapered roller 4 is pressed against the inner wall surface of the pocket 5a. Therefore, it is possible to use the measuring jig 13 in which the generatrix of the outer peripheral surface 13 a is convex with respect to the rolling surface 4 a of the tapered roller 4. If the measurement jig 13 convex generatrix of the outer peripheral surface 13a relative to the rolling surface 4a of the tapered roller 4, the taper angle alpha ₂ of the inner ring 2 is about even different conical rolling bearing 1, the same measurement jig 13 Can be used to measure cage pocket clearance dimensions.

  FIG. 8 shows a different embodiment of the cage pocket clearance dimension measuring device. This cage pocket clearance dimension measuring device 10 is provided with a pressing means 16 for pressing each tapered roller 4 against the small diameter side of the cage 5. In this example, the pressing means 16 has a compression spring 16 b interposed between the upper end of the support 16 a fixed to the support means 12 and the end face on the large diameter side of the tapered roller 4. When the pressing means 16 is provided, the tapered rollers 4 are always pressed against the small diameter side of the cage 5 regardless of gravity, so the cage / roller assembly is set so that the small diameter side of the cage 5 is on the lower side. There is no need to support the solid 11 with the support means 12. In other words, the cage pocket clearance dimension measuring device 10 can be used in an arbitrary posture.

  FIG. 9 shows a further different embodiment of the cage pocket clearance dimension measuring device. This cage pocket clearance dimension measuring device 10 includes a cage mounting table as a support means 12 composed of a plurality of divided tables 12a each capable of changing the arrangement, and a jig insertion space 17 between the divided tables 12a. Is provided. In the jig insertion space 17, a portion of the measuring jig 13 whose outer peripheral surface 13 a is in contact with the rolling surface 4 a of each tapered roller 4 is projected below the end surface 5 b on the small diameter side of the cage 5. When the cage mount as the support means 12 has the jig insertion space 17, the measurement jig 13 that is long in the axial direction as shown in the figure can be used. When the measuring jig 13 is long in the axial direction, the change width of the diameter of the tapered outer peripheral surface 13a can be widened, so that the cage pocket clearance dimension S can be measured for the cage 5 of various diameters. it can.

It is sectional drawing of a tapered roller bearing. It is II-II sectional drawing of FIG. It is a figure which shows schematic structure of the holder | retainer pocket clearance dimension measuring apparatus concerning embodiment of this invention. FIG. 4 is a partially enlarged view of FIG. 3. It is explanatory drawing of the 1st method of measuring the axial direction position of a measuring jig. It is explanatory drawing of the 2nd method of measuring the axial direction position of a measurement jig. It is the elements on larger scale of the holder | retainer pocket clearance dimension measuring apparatus concerning different embodiment of this invention. It is a figure which shows schematic structure of the holder | retainer pocket clearance dimension measuring apparatus concerning further different embodiment of this invention. It is a figure which shows schematic structure of the holder | retainer pocket clearance dimension measuring apparatus concerning further different embodiment of this invention. It is explanatory drawing of the conventional cage | basket pocket clearance dimension measuring method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Tapered roller bearing 2 ... Inner ring 3 ... Outer ring 4 ... Tapered roller 4a ... Rolling surface 5 ... Cage 5a ... Pocket 10 ... Cage pocket clearance dimension measuring device 11 ... Cage / roller assembly 12 ... Support means 13 ... Measuring jig 13a ... outer peripheral surface 14 ... axial position measuring means 16 ... pressing means 17 ... jig insertion space S ... cage pocket clearance dimension δ ... radial cage pocket clearance increment δ ₁ ... amount of tapered roller movement δ ₂ ... Axis travel of measuring jig

Claims (6)

A ring-shaped cage having pockets at a plurality of locations in the circumferential direction, and a plurality of tapered rollers held in the respective pockets of the cage, the width of the outer diameter edge of the pocket being larger than the diameter of the tapered rollers In a narrow tapered roller bearing, a device for measuring a cage pocket clearance dimension which is a dimension of a clearance between the cage and the tapered roller,
Support means for supporting the cage and the roller assembly composed of the cage and the tapered roller separated from the tapered roller bearing, and an inner circumference of the tapered roller row of the cage / roller assembly supported by the support means A tapered roller having a measuring jig in which a tapered outer peripheral surface is in contact with a rolling surface of each tapered roller, and an axial position measuring means for measuring an axial position of the measuring jig. Bearing cage pocket clearance measuring device.   2. The cage pocket size measuring device for a tapered roller bearing according to claim 1, wherein the outer peripheral surface of the measuring jig is convex with respect to the rolling surface of the tapered roller.   The cage pocket size measuring device for a tapered roller bearing according to claim 1 or 2, wherein a pressing means for pressing the tapered roller against the smaller diameter side of the cage is provided.   4. The cage pocket dimension measuring device for a tapered roller bearing according to claim 1, wherein the measuring jig is made of ceramic.   5. The holder according to claim 1, further comprising a retainer platform on which the retainer / roller assembly is placed in contact with a small-diameter end face of the retainer as the support means. The device mount is a cage pocket of a tapered roller bearing having a jig insertion space into which a portion protruding from the end surface on the small diameter side of the cage of the measuring jig contacting the rolling surface of each tapered roller is inserted. Dimension measuring device. A ring-shaped cage having pockets at a plurality of locations in the circumferential direction, and a plurality of tapered rollers held in the respective pockets of the cage, the width of the outer diameter edge of the pocket being larger than the diameter of the tapered rollers In a narrow tapered roller bearing, a method for measuring a cage pocket clearance dimension which is a dimension of a clearance between the cage and the tapered roller,
The cage and the roller assembly comprising the cage and the tapered roller are taken out from the tapered roller bearing, and a tapered outer circumferential surface is provided on the inner circumference of the tapered roller row of the cage / roller assembly. Measure the cage pocket clearance of tapered roller bearings by placing a measurement jig in contact with the moving surface, measuring the axial position of the measurement jig, and obtaining the cage pocket clearance from the measurement result. Method.

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