CN111964907A - Measuring device for axial movement of NJ type and NF type cylindrical roller bearings - Google Patents
Measuring device for axial movement of NJ type and NF type cylindrical roller bearings Download PDFInfo
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- CN111964907A CN111964907A CN202010921477.9A CN202010921477A CN111964907A CN 111964907 A CN111964907 A CN 111964907A CN 202010921477 A CN202010921477 A CN 202010921477A CN 111964907 A CN111964907 A CN 111964907A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/04—Bearings
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Abstract
The invention discloses a device for measuring axial play amount of NJ type and NF type cylindrical roller bearings, which comprises a supporting reference disc, an inner ring measuring disc, a gauge holder and a measuring gauge; the supporting reference disc comprises a circular ring disc and an outer supporting ring integrally extending from the bottom surface of the circular ring disc; a ring of ring grooves are formed in the inner hole surface of the circular ring disc, and the width of each ring groove is larger than the axial displacement of the bearing; the inner ring measuring disc comprises a circular plate and an inner support ring integrally extending from the bottom surface of the circular plate; the thickness of the circular plate is smaller than the width of the ring groove; a circular plate of the inner ring measuring disc is embedded in a ring groove on the supporting reference disc; the meter clamping seat is a horizontal rod piece with a mounting hole in the center, and is mounted on the top surface of the supporting reference plate through two bolts; the measuring rod of the measuring gauge is vertically downwards inserted into the center hole of the gauge clamping base, and the lower end of the measuring rod abuts against the center of the top surface of the inner ring measuring disc. The measuring device of the invention does not need to repeat measurement for many times and does not need to evaluate values through calculation, thereby being simple and convenient to measure.
Description
Technical Field
The invention relates to a bearing measuring device, in particular to a device for measuring axial play of NJ type and NF type cylindrical roller bearings.
Background
NF type cylindrical roller bearing: the inner ring is provided with double flanges which can not be separated from the roller, and the outer ring is provided with a single flange which can only fall off freely from one side;
NJ type cylindrical roller bearing: the outer ring is provided with double flanges which can not be separated from the roller, and the inner ring is provided with a single flange which can only fall off freely from one side;
the play amount of the bearing is influenced by the aspects of bearing play, the matching of a shaft and the inner diameter of the bearing, the matching of the outer diameter of the bearing and a bearing shell, the pre-tightening force of assembly and the like, and the service life is reduced if the axial play amount is too large or too small. The NJ type and NF type cylindrical roller bearings have no standard measuring method and measuring device on the axial play amount. The axial play of the cylindrical roller bearing is of great significance for designing the axial play of special NJ type and NF type double-row cylindrical roller bearings.
At present, no method for clearly unifying the measurement of the bearing play amount of the NJ type cylindrical roller bearing and the NF type cylindrical roller bearing is available, and most of the adopted methods are to measure the heights of an inner ring and an outer ring at multiple points and then obtain an average height difference value to obtain the bearing play amount value. The method has the disadvantages that the bearing needs to be measured in multiple points, and the measured value needs to be obtained through calculation, so that the method has measurement errors and is tedious and not intuitive.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a device for measuring axial play amount of NJ type and NF type cylindrical roller bearings, which is simple and convenient to measure, does not need to repeatedly measure for many times and does not need to evaluate by calculation.
The purpose of the invention is realized as follows: a measuring device for axial play amount of NJ type and NF type cylindrical roller bearings comprises a supporting reference disc, an inner ring measuring disc, a gauge clamping seat and a measuring gauge; wherein the content of the first and second substances,
the supporting reference disc comprises a circular ring disc and an outer supporting ring integrally extending from the bottom surface of the circular ring disc; a ring of annular groove is formed in the inner hole surface of the annular disc, and the width of the annular groove is larger than the axial displacement of the bearing; two threaded holes are formed in the top surface of the circular ring disc in a centrosymmetric manner;
the inner ring measuring disc comprises a circular plate and an inner support ring integrally extending from the bottom surface of the circular plate; the diameter of the circular plate is matched with that of the ring groove on the supporting reference disc, and the thickness of the circular plate is smaller than the width of the ring groove; a circular plate of the inner ring measuring disc is embedded in the annular groove on the supporting reference disc;
the meter clamping seat is a horizontal rod piece with a mounting hole formed in the center, two ends of the meter clamping seat are respectively symmetrically bent into an L shape, a bolt hole corresponding to the two threaded holes in the supporting reference plate is formed in the lower horizontal part, and the meter clamping seat is mounted on the top surface of the supporting reference plate through the two bolts;
and the measuring rod of the measuring gauge is vertically and downwardly inserted into the center hole of the gauge clamping seat, and the lower end of the measuring rod abuts against the center of the top surface of the inner ring measuring disc.
The measuring device for axial play amount of the NJ type and NF type cylindrical roller bearings is characterized in that the outer diameter of the outer supporting ring of the supporting reference disc is smaller than that of the circular ring disc.
The measuring device for the axial play amount of the NJ-type and NF-type cylindrical roller bearings is characterized in that the outer diameter of the inner support ring of the inner ring measuring disc is matched with the inner hole diameter of the support reference disc.
The measuring device for the axial play amount of the NJ type and NF type cylindrical roller bearings is characterized in that the measuring instrument is a dial indicator or a dial indicator.
The measuring device for axial play amount of the NJ type and NF type cylindrical roller bearings has the following characteristics: the end face of the outer ring of the bearing is used as a measuring reference, the small end face of the inner ring is used as a measuring face, the reading position is located at the center of the bearing, the play amount of the bearing can be directly measured, and a measured value can be obtained from a numerical value displayed by a measuring meter. Compared with the existing measuring mode, the method is simpler and more convenient, repeated measurement is not needed, and evaluation through calculation is not needed.
Drawings
Fig. 1 is a schematic structural view of an apparatus for measuring axial play of the NJ type and NF type cylindrical roller bearings of the present invention.
Detailed Description
The invention will be further explained with reference to the drawings.
Referring to fig. 1, the device for measuring axial play of NJ type and NF type cylindrical roller bearings of the present invention includes a supporting reference plate 1, an inner ring measuring plate 2, a clamping gauge stand 3 and a measuring gauge 4; wherein the content of the first and second substances,
the supporting reference disc 1 comprises a circular disc 11 and an outer supporting ring 12 integrally extending from the bottom surface of the circular disc 11; the outer diameter of the outer supporting ring 12 is smaller than that of the circular ring disc 11; a ring of ring grooves 10 are formed in the inner hole surface of the circular ring disc 11, and the width of each ring groove 10 is larger than the axial displacement of the bearing; two threaded holes are formed in the top surface of the circular ring plate 11 in a central symmetry manner;
the inner ring measuring disc 2 comprises a circular plate 21 and an inner support ring 22 integrally extending from the bottom surface of the circular plate 21; the outer diameter of the inner support ring 22 is matched with the diameter of an inner hole of the support reference disc 1; the diameter of the circular plate 21 is matched with that of the ring groove 10 on the support reference disc 1, and the thickness of the circular plate 21 is smaller than the width of the ring groove 10; the outer diameter of the inner support ring 22 is matched with the diameter of an inner hole of the support reference disc 1; the circular plate 21 of the inner ring measuring disc 2 is embedded in the annular groove 10 on the supporting reference disc 1;
the meter clamping seat 3 is a horizontal rod piece with a mounting hole formed in the center, two ends of the meter clamping seat 3 are respectively symmetrically bent into an L shape, a bolt hole corresponding to two threaded holes in the supporting reference plate 1 is formed in the lower horizontal part, and the meter clamping seat 3 is mounted on the top surface of the supporting reference plate 1 through two bolts 30;
the measuring gauge 4 is a dial indicator or a dial indicator; the measuring rod of the measuring gauge 4 is vertically downwards inserted into the center hole of the gauge clamping base 3, and the lower end of the measuring rod abuts against the center of the top surface of the inner ring measuring disc 2.
Before measurement, the gauge holder 3 and the measuring gauge 4 are adjusted to enable the measuring gauge 4 to be in a measuring range, then the bottom surface of the outer support ring 42 supporting the reference disc 1 and the bottom surface of the inner support ring 22 of the inner ring measuring disc 2 are located on the same horizontal plane, calibration of the measuring gauge 4 is started, and the reading of the measuring gauge 4 is enabled to return to zero. After the outer ring 51, the bearing inner ring 52 and the cylindrical roller 53 of the bearing to be measured are assembled, the measuring device is placed on the bearing to be measured which is horizontally placed, namely the supporting reference disc 1 is placed on the end face of the outer ring 51, the inner ring measuring disc 2 is placed on the small end face of the inner ring 52, then reading is started, and the value on the measuring gauge 4 is the play value of the bearing.
The measuring device for axial play amount of the NJ type and NF type cylindrical roller bearings is simple to manufacture, only ordinary steel is selected, the measuring device can be manufactured by common machining methods such as turning, milling, planing and the like, attention needs to be paid to certain precision requirement on the flatness of the measuring device, and the flatness and the curvature of the bottom surface of an outer supporting ring 12 of a supporting reference disc 1, the top surface of a circular plate 21 of an inner ring measuring disc 2 and the bottom surface of an inner supporting ring 22 in the measuring device need to be within 0.005 mm.
The axial play of the double-row cylindrical roller bearing is the combination of the axial play of the single-row cylindrical roller bearing. The axial play amount detection device detects the axial play amount of the single-row bearing through the simple and reasonable axial play amount detection device, and realizes the combination of the axial play of the double-row cylindrical rollers.
The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions should also fall within the scope of the present invention, and should be defined by the claims.
Claims (4)
1. A measuring device for axial play amount of NJ type and NF type cylindrical roller bearings comprises a supporting reference disc, an inner ring measuring disc, a gauge clamping seat and a measuring gauge; it is characterized in that the preparation method is characterized in that,
the supporting reference disc comprises a circular ring disc and an outer supporting ring integrally extending from the bottom surface of the circular ring disc; a ring of annular groove is formed in the inner hole surface of the annular disc, and the width of the annular groove is larger than the axial displacement of the bearing; two threaded holes are formed in the top surface of the circular ring disc in a centrosymmetric manner;
the inner ring measuring disc comprises a circular plate and an inner support ring integrally extending from the bottom surface of the circular plate; the diameter of the circular plate is matched with that of the ring groove on the supporting reference disc, and the thickness of the circular plate is smaller than the width of the ring groove; a circular plate of the inner ring measuring disc is embedded in the annular groove on the supporting reference disc;
the meter clamping seat is a horizontal rod piece with a mounting hole formed in the center, two ends of the meter clamping seat are respectively symmetrically bent into an L shape, a bolt hole corresponding to the two threaded holes in the supporting reference plate is formed in the lower horizontal part, and the meter clamping seat is mounted on the top surface of the supporting reference plate through the two bolts;
and the measuring rod of the measuring gauge is vertically and downwardly inserted into the center hole of the gauge clamping seat, and the lower end of the measuring rod abuts against the center of the top surface of the inner ring measuring disc.
2. The NJ-type and NF-type cylindrical roller bearing axial play amount measuring device according to claim 1, wherein an outer diameter of an outer support ring supporting the reference disc is smaller than an outer diameter of the circular ring disc.
3. The NJ-type and NF-type cylindrical roller bearing axial play amount measuring device as claimed in claim 1, wherein an outer diameter of an inner support ring of the inner ring measuring disc is adapted to an inner hole diameter of the support reference disc.
4. The device for measuring axial play of the NJ-type and NF-type cylindrical roller bearings according to claim 1, wherein the measuring gauge is a dial gauge or a dial gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010921477.9A CN111964907A (en) | 2020-09-04 | 2020-09-04 | Measuring device for axial movement of NJ type and NF type cylindrical roller bearings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010921477.9A CN111964907A (en) | 2020-09-04 | 2020-09-04 | Measuring device for axial movement of NJ type and NF type cylindrical roller bearings |
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| Publication Number | Publication Date |
|---|---|
| CN111964907A true CN111964907A (en) | 2020-11-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010921477.9A Pending CN111964907A (en) | 2020-09-04 | 2020-09-04 | Measuring device for axial movement of NJ type and NF type cylindrical roller bearings |
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| CN (1) | CN111964907A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113740062A (en) * | 2021-08-03 | 2021-12-03 | 人本股份有限公司 | Axial play amount detection device for retainer |
-
2020
- 2020-09-04 CN CN202010921477.9A patent/CN111964907A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113740062A (en) * | 2021-08-03 | 2021-12-03 | 人本股份有限公司 | Axial play amount detection device for retainer |
| CN113740062B (en) * | 2021-08-03 | 2024-02-13 | 人本股份有限公司 | Cage axial displacement detection device |
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