JPS6032802B2 - Rolling bearing rotational accuracy and clearance measuring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a measuring device that allows a single device to measure the clearance and rotational accuracy of a rolling bearing without changing the bearing.

With conventional measuring devices, separate devices must be prepared to measure rotational accuracy and clearance, and it is especially troublesome to change the set when measuring large bearings.

In addition, when measuring radial clearance, it is necessary to apply the measurement load from above and below, which not only makes it difficult to apply an even radial load to the bearing to be measured, but also makes it difficult to place the transferred body on the load side correctly on the raceway surface of the inner and outer raceways. It was also difficult to bring them into contact, and when manual operation was carried out, it was inevitable that the load would fluctuate. It is also used when measuring rotational accuracy. Because the inner ring had to be rotated and the outer ring had to be rotated depending on the fixed bearing ring, the ikioi device became complicated. The applicant first stops the rotation of the outer ring (or inner ring) of the bearing to be measured, and then rotates the inner ring (
Invented and patented a measuring device that made it possible to measure the gap in one set of bearings to be measured by rotating only the bearing (or outer ring) and making it possible to move the rotary table that holds the bearing to be measured. An application was filed (Showa $ year patent Fuji No. 111769).

The present application relates to an improvement of the measuring device, and instead of having a clearance measuring member attached to the cylinder, a pair of clearance measuring members are provided at the outer diameter end of the rotary table, and the cylinder and the rotary table are connected to each other. If there is play between the installed spindle shafts,
Even if there is a setting failure of the bearing to be measured, highly accurate measurement values can be obtained without being affected by this.

Next, an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, one leg body 2, 3 is erected on a base 1, and arm bodies 4, 5 are pivotally attached to the top of the leg body. be. In addition, saddles 11 and 12 each having a position-adjustable measuring element 7, 8 for measuring radial runout and a measuring element 9, 10 for measuring axial runout are installed movably along the arm. I'm here. A rotary table 14, which is located near the probes 7, 8, 9, and 10 and is used to mount the bearing 13 to be measured, is directly connected to a spindle shaft 15, and the spindle shaft 15 is connected to the arm body 1.
6 through bearings 17, 17 so as to be rotatable but not movable in the vertical direction.

Further, an electric motor 25 for rotating the rotary table 14 is connected to the other end of the spindle shaft 15 . The overall body 16 has shafts 18 and 19 extending perpendicularly to the marquee line of the cylinder, and these shafts are connected to a pair of supporting members 3 erected inside the legs 2 and 3 on the base 1. It is supported by plummer locks 22 and 23 attached to the tops of brackets 20 and 21. Note that, if necessary, the segment 15 may be supported on the legs 2 and 3 instead of the bracket. It is connected to a non-toxic cylindrical shaft 6 via a feed screw 25 and can be moved up and down.

Further, a knob 26 is attached to the upper part of the measuring element 7 to adjust the interval between the radial runout measuring elements 7 and 8. The knob 27 attached above the gauge head 9 is the axial runout gauge head 9,
Adjust the interval of 10. Electric motor 42 mounted on base 1
is connected to the shaft 18 via a chain 29, and when the electric motor 42 rotates, the shafts 18 and 19 rotate, and accordingly the cylinder 16 is moved back and forth by 90° on the plane of the paper, making it possible to measure the radial clearance. shall be.

Further, by rolling the segment body 16 at 180 degrees, it becomes possible to measure the axial clearance. An angle plate 30 is connected to the end of the shaft 19 and displays the rearward angle of the cylinder 15.

Further, as shown in FIG. 3, the cylinder body 16 is provided with an arm body 31, and the outer ring of the bearing to be measured 13 is attached to the tip of the arm body 31.
A measuring element 32 for measuring a radial clearance in contact with 3 is attached. Further, as shown in FIG. 4, a pair of measuring elements 32 are provided protruding from the outer end of the rotary table 14 provided on the spindle shaft 15, and the measuring elements come into contact with the end face of the outer ring 33 of the bearing to be measured. It is designed to measure the axial clearance. First, in order to measure the radial runout of the inner ring, the inner face of the inner ring 34 is attached to three supports 35 protruding from the top surface of the rotary table 14, as shown on the A-A side of Fig. 1. A presser ring 36, which also serves as a wheel weight, is iron-bonded to the outer ring 33.

Further, the rotation of the outer ring 33 is stopped by pushing the tip of a bar 37 provided on the fixed side 38 of the device into the hole provided in the holding ring. Next, the arm body 4 is pivoted onto the bearing 13 to be measured using the legs as a reference, and the electric motor 6 is rotated to raise and lower the measuring elements 7 and 8 to the measuring position. The electric motor 28 is driven with the measuring element 7 in contact with the outer curved surface of the outer ring 33 and the measuring element 8 in contact with the inner curved surface of the inner ring 34, and the rotary table 14 is rotated to measure the radial runout of the inner ring. Further, the radial runout of the outer ring is measured by bringing a measuring element (not shown) provided on the rotary table 14 into contact with the outer ring surface of the outer ring and rotating the rotary table together. To measure the axial runout of the inner ring, see Figure 1B.
- As shown on the B side, the arm body 5 is rotated to bring the gauge head 10 into contact with the lower end surface of the inner ring 34, the gauge head 9 is brought into contact with the upper surface of the holding ring 36, the bearing to be measured 13 is held between the rotary table Rotate 14 once. The axial runout of the outer ring is measured by applying a measuring element (not shown) provided on the rotary table 14 to the lower end surface of the outer ring or the upper surface of the holding ring 36, and rotating the rotary table once. To measure the radial clearance, as shown in FIG.
9 placed on the screw koji 40 set upright in the center of the rotary table.
The inner ring is fixed via the presser foot 39 by the nut 41 screwed in once.

Next, the electric motor 42 is driven to move the rotary table 14 to the left 900 as shown in FIG.
from above and rotate the rotary table 14 several times to read the indicated value of the measuring stylus 32. Thereafter, the rotary table is rotated in the opposite direction to return to its original angular position. Next, as shown by the broken line in FIG.
180o to the right to the rotating table while keeping it relatively fixed.
When reversed, the measuring element 32 comes into contact with the outer ring surface of the outer ring from below. After rotating the rotary table 14 in this state, it is reversely rotated to return to the original angular position, the indicated value of the measuring stylus 32 is read, and the value of the radial clearance is calculated based on the constant value on both sides. To measure the axial clearance, a pair of arms 31 are provided at the tips of a pair of arms 31 that protrude from the outer end of the rotary table 14 at symmetrical positions with respect to the axis of the spindle shaft 15, as shown by solid lines in FIG. Measuring head 3
2 is brought into contact with the lower end surface of the outer ring 33 of the bearing, and the rotary table 14 is rotated.

Then, the measuring element 32 rotates together with the rotary table 14, and measurement is performed. Next, the rotary table 4 is rotated 180 degrees as shown by the dotted line in FIG.
Rotate 4 and take measurements. Find the difference between the maximum and minimum values of the measurement values obtained with each probe, and average these to obtain the measurement value. The radial clearance can also be measured by bringing the pair of probes 32 into contact with the outer ring surface and moving the rotary table 14 as shown in FIG. 3. As mentioned above, in this invention, since the rotary table can be mounted on the head and neck, it is possible to measure internal and external run-out and clearance with one device, and there is no need to change the bearing settings, so it is particularly easy to perform the measurement. became.

Furthermore, when measuring the clearance, especially in large bearings, it is not necessary to apply measurement loads to the bearing from above and below, and an even radial load can be obtained. Furthermore, even if the rolling elements are located in an abnormal position before measurement, one bearing ring is fixed and the other bearing ring is rotated, so the frictional force at the contact part at the abnormal position is removed. This allows the rolling body to be brought into proper contact with the raceways and surfaces of the inner and outer rings, allowing for highly accurate measurements. Furthermore, when measuring the axial clearance, the probe was protruded from the outer side of the rotary table and brought into contact with the end face of the outer ring of the bearing, so the rotary table and the inner ring of the bearing were directly fixed. Even if there is a play between the spindle and the extra-axial muscle that has been carefully placed, the play does not appear as a measurement error, unlike when the arm body 31 and the probe 35 are attached to the outer cylinder.

In addition, since the probe is located near the measurement site, the arm body 31 becomes short, and even if vibration or deflection occurs at the measurement site,
Since these errors can be minimized, accurate measured values can be obtained. In addition, by providing a pair of measuring elements symmetrically with respect to the wisteria line of the spindle shaft as in the example, highly accurate measured values can be maintained even if the bearing to be measured is not set correctly. It greatly contributes to high-accuracy measurement of bearings and automation of measurements. Additional Relationship This invention is disclosed in Japanese Patent No. 1167310 (Japanese Patent Publication No. 5716
2001), “Rotational accuracy and clearance of rolling bearings.
Regarding the improvement of the cylindrical body and rotary table, a pair of axial clearance measuring parts were installed at the outer diameter end of the rotary table, instead of having a clearance measuring part attached to the joint body. Even if there is play between the spindle shafts to which the spindle is attached, or if the bearing to be measured is improperly set, highly accurate measured values can be obtained without being affected by these.

[Brief explanation of the drawing]

Fig. 1 is a partial longitudinal side view of an embodiment of the present invention, Figs. 2 to 4 are sectional views of the external part, Fig. 2 shows the mounting state of the bearing to be measured, and Fig. 3 shows the radial clearance. Fig. 4 shows the case of measuring the axial clearance. 1... Base, 2, 3... Legs, 4, 5... Arms, 7, 8
...Radial runout measurement member (measuring head), 9, 10...
Axial runout measurement member (measuring head), 16... joint body,
15... Spindle axis, 18, 19... Axis, 20, 21
...Bearing part, 32...Gap measurement member (measuring head). Figure 1 Figure 3 Tsutomu Figure 2 Figure Man 4

Claims (1)

[Claims] 1. A spindle shaft with a rotary table for mounting the bearing to be measured on one end and a prime mover attached on the other end, a cylindrical body rotatably supporting the spindle shaft, and a rotary table extending from the cylindrical body perpendicular to the axis. A rolling bearing rotational accuracy and clearance measuring device comprising a pair of supporting members rotatably supporting a pair of shafts extending in a direction, a prime mover for tilting the pair of shafts, a rotational accuracy measuring mechanism, and a clearance measuring mechanism. The rotational accuracy measuring mechanism includes an arm rotatably attached to a pair of legs erected on a base and extending inward, and an arm movable in the attachment direction to one of the arms and attached to the arm. A member for measuring radial runout of the inner ring that can be raised and lowered orthogonally, a member for measuring axial runout of the inner ring that is attached to the other arm and movable along the arm, and a radial runout of the outer ring that is attached to the rotary table. The clearance measuring mechanism includes a measuring member and an axial runout measuring member, and the clearance measuring mechanism includes a radial clearance measuring member that contacts the outer diameter surface of an outer ring attached to a body extending axially outward from the cylinder body, and A rolling bearing rotation accuracy and clearance measuring device consisting of an axial clearance measuring member attached to the tips of a pair of arms protruding from the radial end at symmetrical positions with respect to the axis of the spindle shaft and in contact with the end face of an outer ring.