A measuring instrument without undercoating jumping bearing and a method of using the same

Abstract

The application discloses a measuring instrument without hooking bottom jumping bearing and a use method thereof, and belongs to the field of measuring equipment, and comprises a bearing tool, the bearing tool is provided with a plurality of steps, the bearing tool is axially provided with a ball inlet hole penetrating through the bearing tool, and the steps are provided with ball holes in communication with the ball inlet hole. The steps on the bearing tool can place bearings of different models, so that the jumping values of two bearings can be measured at the same time, the balls are placed into the ball inlet hole on the bearing tool, the balls enter the gap between the bearing and the bearing tool from the ball holes, and the outer ring of the bearing is filled. The ball loading mode is simple in operation and saves time and effort. The scheme can measure different types of bearings, has a wide application range, can measure two bearings at a time, and is higher in efficiency.

Description

Technical Field

[0001] This invention relates to a bearing measuring instrument, and more specifically, to a measuring instrument for a non-hook-bottom runout bearing and its method of use. Background Technology

[0002] In recent years, my country's bearing industry has developed rapidly, with a wide variety of products, improved product quality and technology, and larger production scale. The application of bearings often requires selection based on their precision, necessitating the use of reliable bearing measuring instruments. Existing bearing measuring instruments generally can only measure the face runout and radial runout of a single bearing simultaneously. Different tooling is required for measuring different types of bearings, and the assembly process for thrust ball bearings with only an outer ring is particularly cumbersome.

[0003] For example, Chinese Patent Publication No. CN210322302U, published on April 14, 2020, is a utility model entitled "A Radial Runout Measuring Device for Ultra-thin Wall Negative Clearance Split Outer Ring Bearings." It includes a positioning sleeve, a pressure sleeve, a base assembly, and a radial runout assembly. The positioning sleeve has a stepped hole in the middle, and threaded holes are evenly distributed around the stepped hole. This design allows for accurate measurement of the radial runout of the inner ring of the ultra-thin wall negative clearance split outer ring bearing by rotating the inner ring. However, this design cannot achieve simultaneous measurement of multiple bearings, and assembling the balls in this negative clearance split outer ring bearing is very cumbersome, resulting in low measurement efficiency. Summary of the Invention

[0004] This invention overcomes the problems of complex and inefficient measurement of runout in existing thrust ball bearings containing only the outer ring, and provides a measuring instrument and method for measuring runout of non-hook-bottomed thrust ball bearings. Only one bearing fixture is needed to complete the ball assembly and runout measurement of different types of thrust ball bearings containing only the outer ring.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a measuring instrument for a non-hook-bottom runout bearing, comprising a bearing fixture, the bearing fixture having several steps, the bearing fixture having an axially penetrating ball inlet hole, and the steps having ball holes communicating with the ball inlet hole. The steps on the bearing fixture can accommodate bearings of different models, thereby allowing simultaneous measurement of the runout values ​​of two bearings. Since the bearing has no inner ring, inserting the balls into the bearing is cumbersome and time-consuming. During the ball loading process, the outer ring of the bearing is placed on the steps of the bearing fixture, and the balls are inserted through the ball inlet hole on the bearing fixture. The balls enter the gap between the bearing and the bearing fixture through the ball holes, filling the outer ring of the bearing. This ball loading method is simple to operate and saves time and effort.

[0006] Preferably, the system also includes a base, on which a bearing fixture table is provided, and a positioning fork is arranged near the bearing fixture table. The bearing fixture table is used to fix the bearing fixture, and the positioning fork is used to adjust the position of the bearing fixture, thereby adjusting the position of the bearing placed on the bearing fixture.

[0007] Preferably, the base is further provided with a first measuring device for measuring the radial runout of the bearing, a second measuring device for measuring the runout of the upper and lower end faces of the bearing, and a third measuring device. The first measuring device is used to measure the radial runout of the bearing, and the first measuring device can be moved and adjusted in the vertical direction; the second measuring device is used to measure the runout value of the upper end face of the bearing; and the third measuring device is used to measure the runout value of the lower end face of the bearing.

[0008] Preferably, the first measuring device includes a bracket that is radially slidably connected along the bearing fixture table, and a horizontally arranged first dial indicator is vertically slidably connected to the bracket. The bracket can slide radially along the bearing fixture table to adjust the contact force between the first dial indicator and the outer ring of the bearing, and adjust the initial reading of the first dial indicator; the vertical sliding of the first dial indicator and the bracket can adjust the first dial indicator to move to the corresponding height of the bearing to measure the runout value.

[0009] Preferably, the second measuring device includes a threaded column and a cantilever bracket rotatably and slidably connected to the threaded column. An adjusting nut for adjusting the position of the cantilever bracket is threaded onto the threaded column, and a second dial indicator is vertically arranged on the cantilever bracket. The cantilever bracket can rotate on the threaded column, thus allowing for the measurement of end face runout at different radii and the measurement of multiple sets of data, resulting in more accurate data. The cantilever bracket can slide on the threaded column, thereby adjusting the contact force between the second dial indicator on the cantilever bracket and the upper end face of the bearing outer ring, and thus adjusting the initial reading of the second dial indicator. The adjusting nut can adjust and fix the position of the cantilever bracket on the threaded column.

[0010] Preferably, the third measuring device includes a support that is radially slidably connected to the bearing fixture, and a third dial indicator is mounted on the support. The support of the third measuring device slides radially along the bearing fixture, allowing adjustment of the contact force between the third dial indicator and the bearing, and thus adjusting the initial reading of the third dial indicator.

[0011] Preferably, a lever frame is provided between the third dial indicator and the bearing fixture, and a right-angle lever is rotatably connected to the lever frame. The working surface of the right-angle lever near the bearing fixture end has a contact point. The rotatable connection between the lever frame and the right-angle lever can convert the vertical runout of the lower end face of the bearing outer ring into the lateral runout of the lever. One end of the working surface of the lever frame contacts the lower end face of the bearing, and the working surface has a contact point, which can make the contact area between the lever and the lower end face of the bearing smaller and the measurement value more accurate. The non-working end contacts the contact point of the third dial indicator.

[0012] The method for using the measuring instrument for the aforementioned non-hook-bottom runout bearing is as follows: S1: Calibration, calibrate the first, second, and third dial indicators using standard parts; S2: Measurement, a. Place the outer ring of the bearing to be measured onto the bearing fixture; b. Insert the balls into the outer ring of the bearing through the ball inlet; c. Place the contacts of the first, second, and lever indicators against the outer end face, upper end face, and lower end face of the outer ring of the bearing to be measured, respectively; d. Rotate the outer ring of the bearing to be measured and read the readings of the three dial indicators. This method is suitable for measuring the end face runout and radial runout of only one bearing, and is simple to operate, saving time and effort.

[0013] Compared with the prior art, the beneficial effects of the present invention are: (1) it is very convenient to measure bearings with only the outer ring and the ball loading process is simple; (2) it can measure different types of bearings and has a wide range of applications; (3) it can measure two bearings at a time, which is more efficient. Attached Figure Description

[0014] Figure 1 This is an isometric view of the present invention.

[0015] Figure 2 This is a schematic diagram of the bearing tooling of the present invention.

[0016] Figure 3 This is the front view of the present invention.

[0017] Figure 4 This is a schematic diagram of the third measuring device of the present invention.

[0018] Figure 5 This is a cross-sectional view of the third measuring device of the present invention.

[0019] In the diagram: 1. Bearing fixture, 2. Ball inlet hole, 3. Ball hole, 4. Base, 5. Positioning fork, 6. Bearing fixture table, 7. First measuring device, 8. Second measuring device, 9. Third measuring device, 10. Support, 11. First dial indicator, 12. Threaded column, 13. Cantilever support, 14. Adjusting nut, 15. Second dial indicator, 16. Support, 17. Third dial indicator, 18. Lever frame, 19. Right angle lever, 20. Contact point, 21. Fixture rod. Detailed Implementation

[0020] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0021] Example 1: As Figures 1 to 5The instrument shown is a measuring instrument for a non-hook-bottom runout bearing, comprising a base 4, with a bearing fixture 6 in the center of the base 4. The bearing fixture 6 is magnetic and can fix the bearing fixture 1, ensuring that the bearing fixture 1 remains stable during data measurement. A positioning fork 5 is provided around the bearing fixture 6, and the jaws of the positioning fork 5 match the outer diameter of the bearing fixture 6. The base 4 also has two symmetrically arranged sliding grooves relative to the bearing fixture 6, in which a first measuring device 7 and a third measuring device 9 are slidably connected respectively. The base 4 also has a threaded post 12, on which a second measuring device 8 is arranged via a cantilever bracket 13. The positioning fork 5 is used to determine the approximate position of the bearing fixture 1, and the bearing fixture 1 is attracted and fixed to the bearing fixture 6. The sliding direction of the sliding groove is along the radial direction of the bearing fixture 6, and the first measuring device 7 and the third measuring device 9 are fixed to the sliding groove by a handle. An adjusting nut 14 is also provided on the threaded post 12 for adjusting the height of the cantilever bracket 13.

[0022] The first measuring device 7 has a support 10 equipped with a first dial indicator 11 for measuring the radial runout of the bearing. The support 10 can move radially along the bearing fixture 6 in the slide groove, thereby driving the first dial indicator 11 to move radially along the bearing fixture 6. The initial reading of the bearing first dial indicator 11 is adjusted. The first dial indicator 11 can slide vertically along the support 10 to adjust the height position of the first dial indicator 11.

[0023] The cantilever bracket 13 in the second measuring device 8 can rotate freely around the threaded column 12. The end of the cantilever bracket 13 where the second dial indicator 15 is installed is also equipped with a fine-adjustment nut for fine-tuning the height of the second dial indicator 15. During the measurement process, after measuring the runout of the upper end face of the bearing once, the cantilever bracket 13 can be rotated to adjust the cantilever bracket 13 to a new position and continue to measure the runout of the bearing end face. Multiple sets of data can be obtained, thereby reducing measurement errors.

[0024] The support 16 of the third measuring device 9 is equipped with a third dial indicator 17, and a lever frame 18 is also provided between the third dial indicator 17 and the bearing fixture 6. A right-angle lever 19 is rotatably connected to the lever frame 18. The lever frame 18 is fixed on the support 16, and one end of the right-angle lever 19 can contact the lower end face of the bearing. The contact surface between the right-angle lever 19 and the bearing is provided with a contact point 20, and the other end contacts the contact point of the third dial indicator 17. The right-angle lever 19 can convert the vertical runout of the lower end face of the bearing into lateral runout, which is convenient for the measurement of the third dial indicator 17. The contact point 20 can reduce the contact area between the lower end face of the bearing and the right-angle lever 20, thereby reducing the measurement error.

[0025] The invention also includes a bearing fixture 1 and a fixture rod 21. The bearing fixture 1 can be engaged and fixed with a bearing fixture table 6. The bearing fixture 1 has several steps, each of which can hold a bearing of a certain size. Therefore, this fixture can measure bearings of various sizes and types. The bearing fixture 1 has a through ball inlet hole 2 in its axial direction. The size of the ball inlet hole 2 matches the diameter of the fixture rod 21. Each step on the bearing fixture 1 has a ball hole 3 that communicates with the ball inlet hole 2. The specific process of loading the balls is as follows: When measuring the runout value of a single bearing, the fixture rod 21 is inserted from the bottom of the bearing fixture 1 to the step corresponding to the bearing to be measured. The outer ring of the bearing to be measured is placed on the corresponding step, and then the balls are inserted from the ball inlet hole 2. The balls will come out from the ball hole 3 and enter between the bearing fixture 1 and the outer ring of the bearing, thus slowly filling the outer ring of the bearing. The outer ring of the bearing rotates directly between the bearing and the shaft on the step. When measuring the runout value of two bearings at the same time, the shaft needs to be filled first. The lower bearing of bearing fixture 1 is filled in, and then the upper bearing of bearing fixture 1 is filled in. First, the fixture rod 21 is inserted from the bottom of bearing fixture 1 to the step corresponding to the lower bearing. Then, the lower bearing is placed on bearing fixture 1 and the balls are installed. Then, the fixture rod 21 is inserted into the step corresponding to the upper bearing. The upper bearing is placed on bearing fixture 1 and the balls are installed. In order to prevent the balls from entering the ball inlet hole 2 from the ball hole 3 in reverse, the fixture rod 21 needs to be placed in the ball inlet hole 2 until all the measurement work is completed.

[0026] The following are specific ways of using this invention.

[0027] Method 1: For measuring a single bearing.

[0028] S1. First, place a pre-measured standard bearing outer ring into the corresponding position of bearing fixture 1. Then, perform a ball-loading operation on the standard part, placing bearing fixture 1 on bearing fixture table 6. While adjusting the position of bearing fixture 1, adjust the position of the bracket 10 of the first measuring device 7 in the slide groove and the position of the first dial indicator 11 on the bracket 10. Rotate the standard part to stabilize the reading of the first dial indicator 11. Adjust the angle of the adjusting nut 14 and the cantilever bracket 13 on the second measuring device 8, as well as the fine-tuning nut. Rotate the standard part to stabilize the reading of the second dial indicator 15. Adjust the position of the support 16 of the third measuring device 9 in the slide groove and the height of the lever frame 18. Rotate the standard part to stabilize the reading of the third dial indicator 17. In this way, the position of bearing fixture 1 on bearing fixture table 6 can be determined.

[0029] S2. Next, begin measuring the runout of the bearing under test. Place the outer ring of the bearing under test onto the pre-determined bearing fixture 1, and then perform the ball loading operation. Place the contact of the first dial indicator 11 against the outer end face of the bearing under test, the contact of the second dial indicator 15 against the upper end face of the bearing under test, and the contact of the right-angle lever 19 against the lower end face of the bearing under test. Rotate the bearing under test on the bearing fixture 1 and read the maximum and minimum values ​​of the first dial indicator 11, the second dial indicator 15, and the third dial indicator 17 respectively. Finally, calculate the runout of the bearing.

[0030] This method can quickly measure the three runout values ​​of the bearing under test. It is simple, convenient, and highly efficient.

[0031] Method 2: Simultaneous measurement of two bearings.

[0032] S1. This step is consistent with the calibration step in Method 1 and is used to determine the position of bearing fixture 1. This prevents the measurement error from increasing or even becoming completely unmeasurable due to incorrect positioning of bearing fixture 1.

[0033] S2. First, prepare two outer rings of the bearings to be tested. Place the two outer rings of the bearings to be tested on the pre-determined bearing fixture 1, and then perform the ball loading operation. First, make the contact of the first dial indicator 11 contact with the outer end face of the upper bearing, make the contact of the second dial indicator 15 contact with the upper end face of the upper bearing, and make the contact of the right angle lever 19 contact with the lower end face of the lower bearing. At the same time, rotate the bearings to be tested on the bearing fixture 1 and read the maximum and minimum values ​​of the first dial indicator 11, the second dial indicator 15, and the third dial indicator 17 respectively. The value measured by the first dial indicator 11 is the radial runout value of the upper bearing, the value measured by the second dial indicator 15 is the end face runout value of the upper end face of the upper bearing, and the value measured by the third dial indicator 17 is the end face runout value of the lower end face of the lower bearing.

[0034] S3. Then, the upper bearing and the lower bearing are taken out along the axial direction of the bearing fixture 1 in sequence, flipped over, and then the lower bearing and the upper bearing are put back into the bearing fixture 1 in sequence. At the same time, the first dial indicator 11 of the first measuring device 7 is moved down along the bracket 10 to the corresponding position of the lower bearing.

[0035] S4. Finally, repeat step S2. At this time, the value measured by the first dial indicator 11 is the radial runout value of the lower bearing, the value measured by the second dial indicator 15 is the end face runout value of the lower end face of the upper bearing, and the value measured by the third dial indicator 17 is the end face runout value of the upper end face of the lower bearing.

[0036] This method can measure the runout values ​​of multiple bearings and is easy to operate. It can also be used to measure only one type of runout value, resulting in higher measurement efficiency.

Claims

1. A measuring instrument for a non-hook-bottom runout bearing, characterized in that, The device includes a bearing fixture and a base. The bearing fixture has several steps and an axial ball inlet hole that penetrates through it. Each step has a ball hole that communicates with the ball inlet hole. It also includes a fixture rod and balls that match the ball inlet hole. The bearing is placed on the corresponding step. The fixture rod can pass through the ball inlet hole of the bearing fixture and reach the step corresponding to the bearing. The balls are inserted through the ball inlet hole and can exit through the ball hole into the space between the bearing fixture and the outer ring of the bearing. The base is also equipped with a first measuring device for measuring the radial runout of the bearing, and a second and third measuring devices for measuring the runout of the upper and lower end faces of the bearing.

2. The measuring instrument for a hookless bottom runout bearing according to claim 1, characterized in that, The base is equipped with a bearing fixture table, and a positioning fork is arranged near the bearing fixture table.

3. The measuring instrument for a hookless bottom runout bearing according to claim 1, characterized in that, The base is provided with two slide grooves symmetrically arranged relative to the bearing fixture table, and the first measuring device and the third measuring device are slidably connected in the slide grooves respectively.

4. The measuring instrument for a hookless bottom runout bearing according to claim 3, characterized in that, The first measuring device includes a bracket that is radially slidably connected along the bearing fixture table, and a horizontally arranged first dial indicator is vertically slidably connected to the bracket.

5. The measuring instrument for a hookless bottom runout bearing according to claim 3, characterized in that, The second measuring device includes a threaded column and a cantilever bracket that is rotatably and slidably connected to the threaded column. An adjusting nut for adjusting the position of the cantilever bracket is threaded onto the threaded column, and a second dial indicator is vertically arranged on the cantilever bracket.

6. The measuring instrument for a hookless bottom runout bearing according to claim 3, characterized in that, The third measuring device includes a support that is radially slidably connected along the bearing fixture, and a third dial indicator is provided on the support.

7. The measuring instrument for a hookless bottom runout bearing according to claim 6, characterized in that, A lever frame is provided between the third dial indicator and the bearing fixture table. A right-angle lever is rotatably connected to the lever frame. The working surface of the right-angle lever near the bearing fixture end has a contact point.

8. A method of using a measuring instrument for a non-hook-bottom runout bearing according to any one of claims 1 to 7, characterized in that, The steps are as follows: S1: Calibration, using standard parts to calibrate the first, second, and third dial indicators; S2: Measurement Place the outer ring of the bearing to be tested onto the bearing fixture; Insert the tooling rod through the bottom of the bearing tooling and reach the step corresponding to the bearing to be tested; insert the balls through the ball inlet and from the ball inlet to the outer ring of the bearing, and rotate the outer ring of the bearing with the shaft on the step to fill the outer ring of the bearing with balls. Place the contacts of the first dial indicator, the second dial indicator, and the lever contact against the outer end face, upper end face, and lower end face of the outer ring of the bearing to be tested, respectively. Rotate the outer ring of the bearing to be tested and read the readings of the three dial indicators.

9. The method of using the measuring instrument for the hookless bottom runout bearing according to claim 8, characterized in that, When measuring the runout of two bearings simultaneously, first insert the tooling rod from the bottom of the bearing fixture to the step corresponding to the lower bearing. Then place the lower bearing on the bearing fixture and install the balls. Next, continue inserting the tooling rod to the step corresponding to the upper bearing, place the upper bearing on the bearing fixture, and install the balls.

10. The method of using the measuring instrument for the hookless bottom runout bearing according to claim 8, characterized in that, The tooling rod needs to remain inside the bead inlet until all measurements are completed.

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