JP2008241509A - Device for measuring amount of movement of rolling body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a measuring device capable of easily and accurately measuring the amount of movement of a cylindrical roller in a radial inward direction in a sub-assembly 10 for rolling bearings that has an outer ring and a plurality of cylindrical rollers and cages. <P>SOLUTION: In the method, a contact 2 is installed on one end 17a of a swing member 1 swingable up and down and that abuts, from underneath, on a cylindrical roller located on the top of the sub-assembly 10. The contact 2 has a magnet 21. A dial gauge 8 for measuring the amount of swing of a swing member 1 is installed on the other end 17b of the swing member 1. Thus, a dial gauge 8 measures the amount of swing of the swing member 1 that swings by depressing the contact 2, while the contact 2 abuts on the cylindrical roller by the magnet 21, from a state in which the cylindrical roller is in contact with the raceway surface. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a measuring apparatus for measuring the amount of movement of a rolling element in a sub-assembly for a rolling bearing having an outer ring, a plurality of rolling elements, and a cage that holds the rolling elements.

  In an apparatus in which a rolling bearing having an outer ring, an inner ring, a plurality of rolling elements and a cage for the rolling elements is incorporated, a plurality of rolling elements held by the cage are arranged on the radially inner side of the outer ring during the assembly. In some cases, a subassembly is configured, and the inner ring is fitted into the subassembly while the subassembly is fitted into the main body of the apparatus. At this time, it is necessary to prevent the rolling elements from falling off in the radially inward direction of the sub-assembly (hereinafter simply referred to as the radially inward direction). For example, as described in Patent Document 1, the diameter of the cage By forming a projection such as a claw on the inner side in the direction, the dropout can be prevented. The cage is formed with a plurality of pocket portions for holding the rolling elements at predetermined intervals in the circumferential direction, and the amount of movement of the rolling elements in the radial direction is limited by the protrusions in the pocket portions. Prevents falling off.

  As shown in FIG. 5, as described above, the inner ring 44 is fitted and assembled to the rolling bearing subassembly 40 having the outer ring 41, the plurality of rolling elements (rollers) 42 and the retainer 43. In this case, the roller 42 at the top is held in the pocket 43 a of the retainer 43 by moving (falling) radially inward due to its own weight. When the inner ring 44 is fitted in this state, the outer peripheral surface of the inner ring 44 is tapered to facilitate assembly, but if the movement amount (falling amount) of the roller 42 is too large, the roller 42 and the inner ring 44 Interfering with each other, making assembly difficult.

  Therefore, in such a subassembly 40, it is necessary to manage the movement amount of the rollers 42 in the pocket portion 43a. As a means for measuring the amount of movement of the roller 42, for example, the method described in Patent Document 2 can be considered. In this method, a displacement meter (sensor) is provided in the vicinity of the rolling element (or a measuring aid having the same shape as the rolling element), the rolling element is moved, and the displacement is measured by the displacement meter to measure the amount of movement. be able to.

Japanese Utility Model Publication No. 5-12753 JP 2001-159502 A (see FIG. 4)

  In the case of the method described in the cited document 2, in order to move the rolling element within the pocket portion, it is necessary to grasp the rolling element with tweezers or use a manipulator. However, in order to apply this measurement method in the actual subassembly 40 (see FIG. 5), it is necessary to provide a displacement meter near the roller 42 (directly below). In this case, since the displacement meter becomes an obstacle, there is a problem that it is difficult to move the rollers 42 by using the tweezers and the manipulator to approach the rollers 42 from the inside in the radial direction. .

  The present invention has been made in view of the above problems, and in the above-described subassembly, the amount of movement of the rolling element that can easily and accurately measure the amount of movement of the rolling element inward in the radial direction. An object of the present invention is to provide a measuring device.

  An apparatus for measuring a moving amount of a rolling element according to the present invention includes an outer ring, a plurality of rolling elements that are magnetic bodies and roll on a raceway surface on an inner peripheral surface of the outer ring, and these rolling elements are radially inward. A measuring apparatus for measuring the amount of movement of the rolling element in a sub-assembly for a rolling bearing having a retainer that holds the amount of movement of the support, and supporting the sub-assembly with the axis being horizontal A member, a swinging member supported so as to be swingable up and down, a contact provided on the swinging member and abutting on the rolling element at the top of the subassembly, and capable of being magnetically attracted, and the contact A measuring instrument for measuring a swinging amount of the swinging member that is swung by pushing down the contact from a state in which the rolling element is in contact with the raceway surface in a state where the rolling element is attracted to the rolling element; Is.

According to this measuring apparatus, when the rolling element is pushed up in a state where the contact is in contact with the rolling element at the top of the sub-assembly, the rolling element can be brought into contact with the raceway surface of the outer ring. When the rolling element is moved inward in the radial direction from this state, the cage is in a state of holding the rolling element while limiting the amount of movement. At this time, the rolling element pushes down the swinging member via the contact, and the swinging member swings according to the moving amount (falling amount) of the rolling element. The movement amount can be easily measured by measuring the swing amount by a measuring instrument.
Furthermore, since the rolling element is a magnetic body and the contact can be magnetically attracted, the contact is magnetically attracted to the rolling element while the rolling element is held by the cage. The moving member can be stationary. Since the measurement by the measuring instrument is performed with the swinging member finally stationary, the swinging amount of the swinging member can be accurately measured, and the movement amount can be accurately measured.

  According to this invention, since the rolling element moves and is held by the cage, the rolling element and the contact are magnetically adsorbed, so that the swinging member can be stationary. For this reason, the amount of rocking of the rocking member can be accurately measured, and the amount of movement of the rolling element can be accurately measured based on this. In addition, it is not necessary to use tweezers to handle the rolling elements, and it is easy to measure the amount of movement of the rolling elements.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 2 is a cross-sectional view showing a sub-assembly 10 for a rolling bearing, which is a measurement object of the present invention, and an inner ring 15 inserted into the sub-assembly 10. In FIG. 2, the rolling bearing includes an outer ring 11, an inner ring 15, a plurality of rolling elements (cylindrical rollers 13) interposed therebetween, and a cage that holds the cylindrical rollers 13 at a predetermined interval in the circumferential direction. 14 is a cylindrical roller bearing. The cylindrical roller 13 rolls on the outer ring raceway surface 12 on the inner circumferential surface 11 a of the outer ring 11 and rolls on the inner ring raceway surface 16 on the outer circumferential surface 15 a of the inner ring 15.

  The cage 14 has a predetermined position in the radial direction inside of the subassembly 10 (the cage 14) (hereinafter, simply referred to as radial inward) from the state in which each cylindrical roller 13 is in contact with the outer ring raceway surface 12. Is held as movable, and the movable amount is limited and held. More specifically, the cage 14 is annular, and a plurality of pocket portions 14a are formed to hold the cylindrical rollers 13 at equal intervals in the circumferential direction. Each pocket portion 14 a has a gap with respect to the cylindrical roller 13. A projection 14b such as a claw is formed on the radially inner side of each pocket 14a. Then, when the cylindrical roller 13 that has been in contact with the outer ring raceway surface 12 moves inward in the radial direction of the cage 14 within each pocket portion 14a by a predetermined distance, the cylindrical roller 13 comes into contact with (hangs on) the projection 14b. Accordingly, the cage 14 is configured to limit the amount of movement of the cylindrical roller 13 inward in the radial direction.

  The cylindrical roller 13 is made of a magnetic metal. Specifically, the cylindrical roller 13 is made of a material such as SUJ2 (high carbon chrome bearing steel), SUS440C (martensitic stainless steel), or SKH4 (high speed tool steel). ).

  And the measuring apparatus of this invention is the amount of movement of the cylindrical roller 13 in the subassembly (intermediate product) 10 which has the outer ring | wheel 11, the some cylindrical roller 13, and the holder | retainer 14 among such rolling bearings. The measurement is performed. The amount of movement is such that when the axis C of the subassembly 10 is horizontal and the cylindrical roller 13 at the top is in contact with the outer ring raceway surface 12 of the outer ring 11, it is dropped and moved to the cage 14. Is the distance (falling amount) to the position where the limit is held.

  FIG. 1 is a perspective view showing an embodiment of the measuring apparatus of the present invention. In FIG. 1, the measuring apparatus includes a support member 5 that supports the subassembly 10 with the axis C horizontal, a swinging member 1 that swings relative to the subassembly 10, and a swinging member 1 that swings up and down. A receiving member 6 that is supported so as to be movable, a contact (contact portion) 2 provided on the swing member 1, and a measuring instrument 8 that measures the swing amount of the swing member 1 are provided.

  The upper surface of the support member 5 is V-shaped having a pair of inclined surfaces 5a, 5a, and can support the subassembly 10 from two points from below. That is, the subassembly 10 can be supported only by placing the subassembly 10 on the support member 5. Further, the support member 5 is configured so that the height position of the upper surface can be adjusted by an adjustment mechanism (not shown) and the distance from the receiving member 6 (the swinging member 1) can be adjusted. Also good. This adjustment mechanism is for accommodating subassemblies of various sizes.

  The receiving member 6 that supports the swing member 1 is formed with a window portion 6a through which the swing member 1 is inserted. The receiving member 6 has a vertical wall-shaped main body portion 6b in which a window portion 6a is formed, and a base portion 6c under the main body portion 6b.

  The swing member 1 has a main body portion 17 that extends linearly in the front-rear direction and a swing shaft portion 18 that extends linearly in the left-right direction orthogonal to the main body portion 17. The contact 2 is fixed to one end 17 a of the main body 17. The swing shaft 18 is a round bar and intersects at the center of the main body 17. And this rocking | fluctuation shaft part 18 exists in the said window part 6a, and is supported by the said receiving member 6 in the both ends. The swing member 1 (main body portion 17) is supported so as to be swingable in the vertical direction around the horizontal axis C1 of the swing shaft portion 18.

  FIG. 3 is an explanatory view showing a part of the subassembly 10 and the measuring apparatus. In FIG. 1 and FIG. 3, the contact 2 protrudes upward at one end 17 a of the main body 17 and is configured to be magnetically attractable. That is, the contact 2 has a magnet 21. The magnet is preferably a permanent magnet in terms of structure (for compactness), but can also be an electromagnet. A ferrite magnet can be applied as the permanent magnet. Moreover, it is good also as what has the magnet 21 in a part of contact 2, and you may comprise the whole contact 2 from a magnet. When the magnet 21 is partly provided, the magnet 21 may be provided at the tip of the contact 2, or the magnet 21 may be embedded in the contact 2.

  Further, the contact 2 can be brought into contact with the lower surface of the cylindrical roller 13 at the top of the subassembly 10 placed on the support member 5 from below. The contact 2 shown in the figure has a spherical upper end. Thus, since the contact 2 has the magnet 21 and the cylindrical roller 13 is a magnetic body, the contact 2 can be magnetically attracted to the cylindrical roller 13 by the magnet.

  The measuring instrument 8 measures the vertical displacement of the other end 17b caused by the swinging of the swinging member 1 (main body part 17), and the measuring instrument 8 shown is a dial gauge. The measuring element 8 a of the dial gauge 8 is brought into contact with the other end 17 b of the main body portion 17, and the amount of swinging of the swinging member 1 in the vertical direction is measured. That is, the other end portion 17b of the main body portion 17 is a measurement target portion. An arm member 19 is provided from the receiving member 6 so as to extend toward the other end 17 b, and the dial gauge 8 is attached to the arm member 19.

  According to this, the contact 2 is brought into contact with the cylindrical roller 13 at the top of the subassembly 10 from below, and the contact 2 is lowered by its own weight from the state in which the cylindrical roller 13 is in contact with the outer ring raceway surface 12. Then, the swing member 1 swings counterclockwise in FIG. By measuring the swinging amount of the swinging member 1 using the dial gauge 8, the amount by which the cylindrical roller 13 pushes down the contact 2, that is, the moving amount (falling amount) of the cylindrical roller 13 is measured. Can do.

A method for measuring the amount of movement of the cylindrical roller 13 by the measuring apparatus configured as described above will be described.
In FIG. 1, the support member 5 supports the subassembly 10 with its axis C horizontal. Then, with the contact 2 coming into contact with the lower surface of the cylindrical roller 13 at the top of the subassembly 10 from below, the swinging member 1 is forcibly swung clockwise (FIG. 3). Is pushed up, the cylindrical roller 13 can be brought into contact with the outer ring raceway surface 12 of the outer ring 11. In this state, the zero point of the dial gauge 8 is adjusted. When the cylindrical roller 13 is in contact with the outer ring raceway surface 12, the contact 2 is attracted to the cylindrical roller 13 by the magnet 21 of the contact 2, and the swing member 1 is stationary.

Then, the contact 2 provided on the swing member 1 is brought into contact with the lower surface of the cylindrical roller 13 from below, and the cylindrical roller 13 is brought into contact with the outer ring raceway surface 12 (FIG. 3). Due to its own weight, the cylindrical roller 13 is moved downward (inward in the radial direction) to push down the swinging member 1, and the cylindrical roller 13 is held in the cage 14 (FIG. 4). In this holding state, the state in which the contact 2 is in contact with the cylindrical roller 13 is maintained by the magnetic force of the magnet 21 of the contact 2. As a result, the swing member 1 is in a stationary state.
Then, the value of the pointer of the dial gauge 8 is read for the swinging amount of the swinging member 1 according to the moving amount of the cylindrical roller 13 from the state in contact with the outer ring raceway surface 12 to the holding state. To measure.

  That is, when the cylindrical roller 13 is dropped freely inward in the radial direction by utilizing its own weight from the state in which the cylindrical roller 13 at the top is in contact with the outer ring raceway surface 12, the cage 14 moves the amount of movement. Limit and hold the cylindrical roller 13. At this time, the cylindrical roller 13 pushes down the swing member 1 via the contact 2, and the swing member 1 swings according to the moving amount (falling amount) of the rolling element. The moving amount of the cylindrical roller 13 can be measured by the measuring device 8 measuring the swing amount. Then, in a state where the cylindrical roller 13 is held by the cage 14, the state in which the contact 2 is in contact with the cylindrical roller 13 by the magnetic force as described above is maintained, and the swing member 1 can be stationary. The measurement of the swinging amount of the swinging member 1 by the dial gauge 8 can be accurately performed because the swinging member 1 is finally stationary, and the amount of movement of the cylindrical roller 13 can be determined based on the swinging amount. It can be measured accurately.

In the above-described embodiment, the case where the cylindrical roller 13 can freely fall by its own weight has been described. However, when the cylindrical roller 13 is small and lightweight, when the swinging member 1 swings, the swinging shaft portion 18 is stationary Due to the influence of frictional force or the like, the cylindrical roller 13 may be difficult to push down the swinging member 1 due to its own weight.
In this case, from the state in which the cylindrical roller 13 is in contact with the outer ring raceway surface 12 (FIG. 3), the operator assists by manually operating the swinging member 1 (finger), and the swinging member 1 is pushed down to the cylinder. The roller 13 may be moved downward (inward in the radial direction) and the cylindrical roller 13 may be held by the cage 14. In this case, if the contact 2 does not have the magnet 21, even if the cylindrical roller 13 is moved downward and held by the retainer 14, the swing member 1 further swings, and the contact 2. Is away from the cylindrical roller 13, and the swinging member 1 is not stationary and is in an unstable state, so that the amount of movement of the cylindrical roller 13 cannot be measured accurately. However, since the contact 2 has the magnet 21, the state in which the contact 2 is in contact with the cylindrical roller 13 is maintained by the magnet 21 even in this case. As a result, the swing member 1 is in a stationary state, and the amount of movement of the cylindrical roller 13 can be accurately measured.

  Further, according to the present invention, the movement amount (falling amount) of the cylindrical roller 13 at the top is measured in a state where the sub assembly 10 is supported with its axis C being horizontal. Therefore, this moving amount is the maximum moving amount that the cylindrical roller 13 can move. Further, this state is the same as the case where the subassembly 10 is fitted in the main body of the apparatus and the inner ring 15 is fitted and assembled thereto. Therefore, by measuring the amount of movement of the cylindrical roller 13 in the subassembly 10 with this measuring device and managing this amount of movement, when assembling as described above, the cylindrical roller 42 and the inner ring 44 as in the prior art (FIG. 5). Can be prevented from interfering with each other. That is, as shown in FIG. 2, the inner ring 15 can be fitted and easily assembled while the cylindrical roller 13 is placed on the tapered portion 15 b formed on the outer peripheral surface of the inner ring 15.

  In addition, the measuring apparatus of the present invention is not limited to the illustrated form, and may be of another form within the scope of the present invention. For example, the measuring instrument may be a non-contact type, such as a laser displacement meter (not shown), in addition to the contact type such as the dial gauge 8. Further, the support member 5 may be replaced with another one, and the support member 5 may be replaced according to the size of the subassembly 10.

  Further, in the measuring apparatus of the present invention, since the vertical movement amount (falling amount) of the cylindrical roller 13 at the top is large in a state where the sub assembly 10 is supported with the axis C being horizontal, the swing member 1 When the difference between the value of the pointer of the dial gauge 8 (swing amount) and the actual amount of movement (falling amount) of the cylindrical roller 13 becomes large, the pointer of the dial gauge 8 And a conversion table for converting the actual movement amount (falling amount) of the cylindrical roller 13 from the value of the dial gauge 8 using the conversion table, the actual movement amount of the cylindrical roller 13 ( It is also possible to convert (falling amount).

It is a perspective view which shows one Embodiment of the measuring apparatus of this invention. It is sectional drawing of the state which decomposed | disassembled the rolling bearing. It is explanatory drawing which shows a part of a subassembly and a measuring apparatus, and is a state which the cylindrical roller is contacting the track surface. It is explanatory drawing which shows a part of a subassembly and a measuring apparatus, and is a state which a cylindrical roller moves below and is hold | maintained at the holder | retainer. It is an exploded sectional view of a rolling bearing for explaining a subject of this invention.

Explanation of symbols

1 Swing member 2 Contact 5 Support member 8 Measuring instrument (dial gauge)
DESCRIPTION OF SYMBOLS 10 Subassembly 11 Outer ring 11a Inner peripheral surface 12 Outer ring raceway surface 13 Cylindrical roller (rolling element)
14 Cage 21 Magnet

Claims (1)

An outer ring, a plurality of rolling elements that roll on a raceway surface that is a magnetic body on the inner peripheral surface of the outer ring, and a cage that holds the rolling elements with a limited amount of movement inward in the radial direction. A measuring device for measuring the amount of movement of the rolling element in a sub-assembly for a rolling bearing having:
A support member for supporting the sub-assembly with the axis being horizontal;
A swinging member supported so as to be swingable up and down;
A contactor provided on the swinging member and abutting on the rolling element at the top of the sub-assembly, and capable of being magnetically attracted;
A measuring instrument for measuring a swing amount of the swinging member swung by depressing the contact from a state in which the rolling element is in contact with the raceway surface in a state where the contact is adsorbed to the rolling element;
An apparatus for measuring the amount of movement of a rolling element.

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