CN114777706A - High-precision measuring device for rotation precision of double-row cylindrical roller bearing - Google Patents
High-precision measuring device for rotation precision of double-row cylindrical roller bearing Download PDFInfo
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- CN114777706A CN114777706A CN202210595969.2A CN202210595969A CN114777706A CN 114777706 A CN114777706 A CN 114777706A CN 202210595969 A CN202210595969 A CN 202210595969A CN 114777706 A CN114777706 A CN 114777706A
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 39
- 238000005259 measurement Methods 0.000 claims abstract description 28
- 238000001514 detection method Methods 0.000 claims abstract description 9
- 239000000758 substrate Substances 0.000 claims abstract description 9
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000010438 granite Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
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Abstract
The utility model provides a high accuracy measurement device of double-row cylindrical roller bearing rotation accuracy, relates to bearing measurement technical field for measurement accuracy is low when solving manual mode and detecting cylindrical roller bearing runout. The invention comprises a mechanical rack, a workbench, a driving assembly and a measuring assembly; the driving assembly comprises an inner ring driving unit and an outer ring driving unit which are positioned on the workbench, and the inner ring driving unit is used for mounting and driving the bearing inner ring to rotate; the outer ring driving unit comprises a transverse driving mechanism and an outer ring rotation driving mechanism, the transverse driving mechanism drives the movable substrate to slide on the workbench along the transverse direction, and radial load is applied to the outer ring of the bearing; the outer ring rotation driving mechanism drives the outer ring of the bearing to rotate through a friction wheel; the movable substrate is provided with a displacement sensor, and a measuring head of the displacement sensor acts on the outer ring of the bearing. When the inner ring and the outer ring of the bearing rotate, the measuring electronic box amplifies the detection data of the displacement sensor and then uploads the amplified data to the computer. The invention can realize high-efficiency and high-precision detection of radial run-out of the cylindrical roller bearing.
Description
Technical Field
The invention relates to the technical field of bearing measurement, in particular to a high-precision measuring device for the rotation precision of a double-row cylindrical roller bearing.
Background
The rotation precision of the bearing comprises the measurement of the radial run-out and the axial run-out of the inner ring and the outer ring of the bearing, and the measurement is an important parameter for measuring the quality of the finished precision bearing. According to the requirements in GB307.2-2005 "principle and method for measuring and inspecting rolling bearing", 14 principle for measuring radial run-out ", the measuring method suitable for measuring the cylindrical roller bearing is 14.2 (shown in figure 1) for measuring the radial run-out of the inner ring of the bearing set and 14.4 (shown in figure 2) for measuring the radial run-out of the outer ring of the bearing set.
At present, a rotation precision measuring instrument of a radial ball bearing can carry out high-precision measurement through a precision shaft system and a sensor. But the loading direction is axial loading during detection, and the measurement parameters comprise the radial runout and axial runout indexes of the inner ring and the radial runout and axial runout indexes of the outer ring. The outer ring or the inner ring of the cylindrical roller bearing is of a separable type and cannot bear axial load, so that the rotation precision of the cylindrical roller bearing cannot be measured by adopting a measuring mode of the rotation precision of the radial ball bearing.
In the bearing industry, manufacturers of cylindrical roller bearings generally adopt a mechanical rack, and measure the rotation precision in a manual mode, so that the subjective error is large, and the measurement precision is low. The industry needs a high-precision rotation precision measuring device for a cylindrical roller bearing, in particular a double-row cylindrical roller bearing.
Disclosure of Invention
The invention aims to provide a high-precision measuring device for the rotation precision of a double-row cylindrical roller bearing, which is used for solving the problem of low measurement precision when the radial run-out of the cylindrical roller bearing is detected manually.
The technical scheme adopted by the invention for solving the technical problems is as follows: a high-precision measuring device for the rotation precision of a double-row cylindrical roller bearing comprises a mechanical rack, wherein the top of the mechanical rack is provided with a workbench, the workbench is provided with a driving assembly and a measuring assembly, and the driving assembly comprises an inner ring driving unit and an outer ring driving unit which are positioned on the workbench; the outer ring driving unit comprises a transverse driving mechanism and an outer ring rotation driving mechanism, and the transverse driving mechanism drives the outer ring rotation driving mechanism to slide on the workbench along the transverse direction; the outer ring rotation driving mechanism comprises an outer ring driving motor located on the transverse driving mechanism, the output end of the outer ring driving motor is provided with a driving friction wheel, and the driving friction wheel applies radial load to the measured bearing when in contact extrusion with the outer wall of the outer ring of the measured bearing and drives the outer ring of the measured bearing to rotate.
Furthermore, the measuring component comprises a displacement sensor and a sensor adjusting frame, the displacement sensor is mounted on the movable substrate through the sensor adjusting frame, and when the transverse driving mechanism drives the movable substrate to slide on the workbench along the transverse direction, a measuring head of the displacement sensor contacts the center of the outer wall of the outer ring of the measured bearing; the displacement sensor is in signal connection with a measuring electronic box on the mechanical rack, and the measuring electronic box amplifies the detection data of the displacement sensor and then uploads the amplified data to the computer.
Further, a high-precision ball shaft system is arranged between the inner ring driving unit and the inner ring mandrel.
Furthermore, the transverse driving mechanism comprises a movable base plate arranged at the top of the workbench in a sliding mode and a loading cylinder arranged at the top of the workbench, and a piston rod of the loading cylinder is fixedly connected with the movable base plate.
Further, the top of the workbench is provided with a guide rail, and the movable base plate is connected with the guide rail in a sliding mode.
Furthermore, an auxiliary wheel which is concentric with the driving friction wheel is arranged on the moving substrate, and the driving friction wheel and the auxiliary wheel are simultaneously contacted with the outer wall of the outer ring of the tested bearing; or/and the driving friction wheel and the auxiliary wheel are respectively arranged at two sides of the displacement sensor.
Furthermore, the displacement sensor carries out coarse adjustment and fine adjustment on the indicating value of the sensor through a sensor adjusting frame.
Further, the sensor adjusting frame is provided with a height adjusting structure, and the height adjusting structure is used for adjusting the height position of the displacement sensor on the sensor adjusting frame to meet the measurement requirements of bearings with different diameters; or/and
the sensor adjusting frame is provided with a longitudinal adjusting structure, and the longitudinal adjusting structure is used for adjusting the longitudinal position of the displacement sensor on the sensor adjusting frame to adapt to the measurement requirements of bearings with different widths.
Further, height adjustment structure is including being located the stand on the sensor adjustment frame, displacement sensor fixes on the sensor mounting panel, the sensor mounting panel is along stand longitudinal sliding, and be equipped with the jackscrew between stand and the sensor mounting panel.
Further, the longitudinal adjusting structure comprises a jack screw located between the moving base plate and the sensor adjusting frame, and the sensor adjusting frame is connected with the moving base plate in a sliding mode along the longitudinal direction.
The beneficial effects of the invention are: the high-precision measuring device for the rotation precision of the double-row cylindrical roller bearing provided by the invention has the following advantages:
(1) when the rotation precision of the cylindrical roller bearing is measured, radial load is applied to the outer ring of the cylindrical roller bearing, so that the outer ring and the inner ring of the cylindrical roller bearing can be kept relatively fixed in the axial direction;
(2) the displacement sensor for detecting the radial runout of the outer ring or the inner ring is in contact with the middle part of the bearing to be measured, so that the measurement precision can be ensured;
(3) the friction wheel is driven by the transverse driving mechanism to contact with the bearing outer ring, and radial load can be provided for the bearing. The magnitude of the radial load of the measured bearing can be changed by changing the air pressure of the air cylinder;
(4) during measurement, the conversion of the radial runout measurement of the inner ring and the outer ring can be quickly realized. The inner ring of the bearing is driven to rotate, the outer ring of the bearing is driven to be locked by a motor, and the radial runout of the inner ring of the bearing can be measured; the inner ring driving motor is locked, the outer ring driving motor drives the outer ring of the bearing to rotate through the friction wheel, and the radial runout of the outer ring of the bearing can be measured;
(5) the invention carries out rotation driving and radial run-out detection on the measured bearing through automatic equipment, can avoid errors caused by manual operation and simultaneously improves the measurement efficiency.
Drawings
FIG. 1 is a schematic diagram of a method for measuring radial run-out of an inner ring of a bearing set in GB 307.2-2005;
FIG. 2 is a schematic diagram of a method for measuring radial run-out of an outer ring of a bearing set in GB 307.2-2005;
FIG. 3 is a cross-sectional view of a double-row cylindrical roller bearing as a measurement object according to the present invention;
FIG. 4 is a front view of the present invention;
FIG. 5 is a top view of the measurement assembly;
in the figure: the device comprises a measuring and driving assembly 1, a workbench 2, a mechanical bench 3, a measuring electronic box 4, a computer 5, an inner ring driving motor 6, a high-precision ball shaft system 7, an inner ring mandrel 8, a measured bearing 9, an auxiliary wheel 10, an outer ring driving motor 11, a driving friction wheel 12, a displacement sensor 13, a sensor adjusting frame 14, a movable substrate 15, a guide rail 16, a loading cylinder 17, an outer ring 18, an inner ring 19, a taper mandrel 20 and a tip 21.
Detailed Description
In GB307.2-2005, as shown in figure 1, the accuracy of the rotation of the bearing set inner race 19 is measured by mounting the bearing set on a tapered mandrel 20 and mounting the tapered mandrel 20 between two apexes 21 to ensure accurate rotation. The indicator is arranged on the outer surface of the outer ring 18 and is as close to the middle of the raceway of the outer ring 18 as possible. The outer ring 18 remains stationary and ensures that its weight is taken up by the rolling bodies. The conical mandrel 20 rotates for one circle, and the reading of the indicator is read. Radial run out Kia is the difference between the maximum and minimum readings of the indicator.
In GB307.2-2005, as shown in figure 2, the rotational accuracy of the outer race 18 of the bearing set is measured by mounting the bearing set on a tapered mandrel 20 and mounting the tapered mandrel 20 between two apexes 21 to ensure accurate rotation. The indicator is arranged on the outer surface of the outer ring 18 and is as close to the middle of the raceway of the outer ring 18 as possible. The inner ring 19 remains stationary and the outer ring 18 rotates one revolution, reading the indicator, and the radial run out Kea of the outer ring of the unitized bearing is the difference between the maximum and minimum readings of the indicator.
As shown in fig. 3, the object to be measured in the present invention is a double-row cylindrical roller bearing, and the inner ring or the outer ring of the bearing has no flange, and it is necessary to limit the relative movement of the inner ring relative to the outer ring along the axial direction during the measurement process.
As shown in fig. 4 and 5, the present invention comprises a measuring and driving assembly 1, a workbench 2, a machine bench 3, a measuring electrical box 4 and a computer 5, and the present invention is described in detail below with reference to the accompanying drawings.
As shown in fig. 4 and 5, the high-precision measuring device for the rotation precision of the double-row cylindrical roller bearing comprises a mechanical rack 3, wherein the mechanical rack 3 is a supporting part of the whole measuring device, a workbench 2 made of granite is arranged on the top of the mechanical rack 3, and a measuring and driving assembly 1 is arranged on the workbench 2; the measuring and driving assembly 1 comprises a driving assembly and a measuring assembly; the drive assembly includes an inner race drive unit and an outer race drive unit.
An inner ring driving unit in the driving assembly comprises an inner ring driving motor 6, a high-precision ball shaft system 7 and an inner ring mandrel 8, wherein the inner ring driving motor 6, the high-precision ball shaft system 7 and the inner ring mandrel 8 are positioned on the workbench 2, one end of the high-precision ball shaft system 7 is connected with the inner ring driving motor 6, the other end of the high-precision ball shaft system 7 is fixedly installed with the inner ring mandrel 8, and a measured bearing 9 is locked and fixed on the inner ring mandrel 8 during measurement; the inner ring driving motor 6 drives the rotation of the inner ring mandrel 8 through the high-precision dense ball shaft system 7, and further drives the rotation of the bearing inner ring, and the measured bearing 9 is a double-row cylindrical roller bearing shown in fig. 3.
The outer ring driving unit in the driving assembly comprises a transverse driving mechanism and an outer ring rotation driving mechanism, wherein the transverse driving mechanism comprises a moving base plate 15, a guide rail 16 and a loading air cylinder 17. The loading cylinder 17 is fixedly connected with the moving base plate 15. The table 2 has a guide rail 16 on the top, and the moving base 15 is slidably connected to the guide rail 16. The movable base plate 15 is driven to move along the transverse direction on the top of the workbench 2 through the extension and contraction of the piston rod of the loading air cylinder 17, and the guide rail 16 is arranged for ensuring the moving precision of the movable base plate 15.
The outer ring rotation driving mechanism includes an outer ring driving motor 11, a driving friction wheel 12, and an auxiliary wheel 10. The outer ring driving motor 11 is located on the moving substrate 15, the output end of the outer ring driving motor 11 is provided with a driving friction wheel 12, and the driving friction wheel 12 applies radial load to the measured bearing 9 when in contact extrusion with the outer wall of the outer ring of the measured bearing 9 and drives the outer ring of the measured bearing 9 to rotate. In order to ensure that the tested bearing 9 cannot deflect when rotating under the driving of the driving friction wheel 12, the moving substrate 15 is provided with an auxiliary wheel 10 which is concentric with the driving friction wheel 12, and the driving friction wheel 12 and the auxiliary wheel 10 are simultaneously contacted with the outer ring outer wall of the tested bearing 9; or/and the driving friction wheel 12 and the auxiliary wheel 10 are separated on both sides of the displacement sensor 13. The driving friction wheel 12 is in contact with the outer wall of one end of the measured bearing 9, the auxiliary wheel 10 is in contact with the outer wall of the other end of the measured bearing 9, the driving friction wheel 12 and the auxiliary wheel 10 are in cooperation with each other to press the whole measured bearing 9, axial deviation is avoided when the measured bearing 9 rotates, and the accuracy of the measured bearing 9 in rotation under the action of the rotation driving mechanism is guaranteed.
The measuring assembly comprises a displacement sensor 13 and a sensor adjusting frame 14. The sensor adjusting frame 14 is fixed on the movable base plate 15, and the displacement sensor 13 is adjustably mounted on the sensor adjusting frame 14. Because the types of the measured bearings 9 are different, and the diameters and the widths of the measured bearings are different, in order to meet the detection requirements of the measured bearings 9 with different sizes, the height position and the longitudinal position of the displacement sensor 13 are adjusted through the sensor adjusting frame 14, and therefore, the sensor adjusting frame 14 is provided with a height adjusting structure which is used for adjusting the height position of the displacement sensor 13 on the sensor adjusting frame 14 to meet the measurement requirements of the bearings with different diameters; the sensor adjusting frame 14 is provided with a longitudinal adjusting structure, and the longitudinal adjusting structure is used for adjusting the longitudinal position of the displacement sensor 13 on the sensor adjusting frame 14 to adapt to the measurement requirements of bearings with different widths. The height adjusting structure comprises an upright post positioned on the sensor adjusting frame 14, the displacement sensor is fixed on the sensor mounting plate, the sensor mounting plate is arranged on the upright post in a longitudinal sliding manner, and a jackscrew is arranged between the upright post and the sensor mounting plate; the sensor mounting plate is slid along the upright column to realize height adjustment of the displacement sensor so as to adapt to radial runout detection of the detected bearings with different diameters; the locking between the sensor mounting plate and the upright post is realized through the jackscrew. The longitudinal adjusting structure comprises a jackscrew located between the movable base plate 15 and the sensor adjusting frame 14, the sensor adjusting frame 14 is connected with the movable base plate 15 in a sliding mode along the longitudinal direction to further achieve position adjustment of the displacement sensor in the longitudinal direction, and locking and fixing between the sensor adjusting frame 14 and the movable base plate 15 are achieved through the jackscrew.
When the radial runout of the inner ring of the detected bearing 9 is detected, the outer ring rotation driving mechanism is powered off and locked, at the moment, the driving friction wheel 12 of the rotation driving device keeps contact with the outer ring of the detected bearing 9 under the action of the loading cylinder 17 so as to prevent the outer ring 18 of the detected bearing from rotating, meanwhile, the driving friction wheel 12 and the auxiliary wheel 10 act on the outer ring of the bearing to provide radial load for the bearing, and the size of the radial load of the detected bearing 9 is changed by adjusting the air pressure of the cylinder 17. The inner ring driving motor 6 rotates, the inner ring 19 of the measured bearing 9 is driven to rotate through the inner ring mandrel 8, the inner ring 19 of the measured bearing 9 rotates for a circle, the displacement sensor 13 slides for a circle along the outer ring of the measured bearing 9 to measure a radial run-out value, the radial run-out value is transmitted to the measured electric box 4 through the displacement sensor 13, the radial run-out value is amplified in the measured electric box 4 and uploaded to measuring software in the computer 5, and the radial run-out curve of the inner ring of the measured bearing 9 is drawn through display on the computer 5.
When the radial runout of the outer ring of the tested bearing 9 is detected, the rotary driving mechanism is powered on and is in a working state, and the inner ring driving motor is powered off and locked. At the moment, the driving friction wheel 12 and the auxiliary wheel 10 of the rotation driving device are kept in contact with the outer ring of the measured bearing 9 under the action of the loading air cylinder 17, radial load is provided for the bearing, and the radial load of the measured bearing 9 is changed by adjusting the air pressure of the air cylinder 17. At this time, the driving friction wheel 12 of the rotation driving device and the driving friction wheel 12 of the rotation driving mechanism rotate under the action of the outer ring driving motor 11, and the outer ring 18 of the bearing 9 to be measured is driven to rotate through friction. The outer ring 18 of the measured bearing 9 rotates for a circle, the displacement sensor 13 slides for a circle along the outer ring of the measured bearing 9 to measure a radial runout value, the radial runout value is transmitted to the measured electric box 4 through the displacement sensor 13, the radial runout value is amplified in the measured electric box 4 and then uploaded to measurement software in the computer 5, and the measurement software is displayed on the computer 5 to draw a radial runout curve of the inner ring of the measured bearing 9.
According to the high-precision measuring device for the rotation precision of the double-row cylindrical roller bearing, when the rotation precision of the cylindrical roller bearing is measured, radial load is applied to the outer ring of the cylindrical roller bearing, and the outer ring and the inner ring of the cylindrical roller bearing can be kept fixed relatively along the axial direction; the displacement sensor for detecting the radial runout of the outer ring or the inner ring is contacted with the middle part of the measured bearing, so that the measurement precision can be ensured; the friction wheel is driven by the transverse driving mechanism to contact with the bearing outer ring, so that radial load can be provided for the bearing. The magnitude of the radial load of the measured bearing can be changed by changing the air pressure of the air cylinder; during measurement, the conversion of radial runout measurement of the inner ring and the outer ring can be quickly realized. The inner ring of the bearing is driven to rotate, the outer ring of the bearing is driven to be locked by a motor, and the radial runout of the inner ring of the bearing can be measured; the inner ring driving motor is locked, the outer ring driving motor drives the outer ring of the bearing to rotate through the friction wheel, and the radial runout of the outer ring of the bearing can be measured; the invention carries out rotation driving and radial run-out detection on the detected bearing through automatic equipment, can avoid errors caused by manual operation and simultaneously improves the measurement efficiency.
Claims (10)
1. A high-precision measuring device for the rotation precision of a double-row cylindrical roller bearing comprises a mechanical rack, wherein the top of the mechanical rack is provided with a workbench, the workbench is provided with a driving assembly and a measuring assembly, and the driving assembly comprises an inner ring driving unit and an outer ring driving unit which are positioned on the workbench; the outer ring driving unit comprises a transverse driving mechanism and an outer ring rotation driving mechanism, and the transverse driving mechanism drives the outer ring rotation driving mechanism to slide on the workbench along the transverse direction; the outer ring rotation driving mechanism comprises an outer ring driving motor located on the transverse driving mechanism, the output end of the outer ring driving motor is provided with a driving friction wheel, and the driving friction wheel exerts radial load on a measured bearing when in contact extrusion with the outer wall of the outer ring of the measured bearing and drives the outer ring of the measured bearing to rotate.
2. The device for measuring the rotation accuracy of the double-row cylindrical roller bearing according to claim 1, wherein the measuring assembly comprises a displacement sensor and a sensor adjusting frame, the displacement sensor is mounted on the movable base plate through the sensor adjusting frame, and when the transverse driving mechanism drives the movable base plate to slide transversely on the workbench, a measuring head of the displacement sensor contacts the center of the outer wall of the outer ring of the measured bearing; the displacement sensor is in signal connection with a measuring electronic box on the mechanical rack, and the measuring electronic box amplifies the detection data of the displacement sensor and then uploads the amplified data to the computer.
3. The apparatus of claim 1, wherein a high precision ball shafting is provided between the inner ring driving unit and the inner ring spindle.
4. The device for measuring the rotation accuracy of a double-row cylindrical roller bearing according to claim 1, wherein the lateral driving mechanism comprises a movable base plate slidably disposed on the top of the worktable, and a loading cylinder disposed on the top of the worktable, and a piston rod of the loading cylinder is fixedly connected to the movable base plate.
5. The apparatus according to claim 1, wherein the table has a guide rail on a top thereof, and the movable base plate is slidably connected to the guide rail.
6. The apparatus according to claim 5, wherein the movable substrate has an auxiliary wheel concentrically disposed with the driving friction wheel, and the driving friction wheel and the auxiliary wheel are simultaneously in contact with an outer wall of the outer ring of the measured bearing; or/and the driving friction wheel and the auxiliary wheel are respectively arranged at two sides of the displacement sensor.
7. The device for measuring the rotation accuracy of the double-row cylindrical roller bearing according to claim 1, wherein the displacement sensor performs coarse adjustment and fine adjustment on the sensor indication value through a sensor adjusting frame.
8. The device for measuring the rotation precision of the double-row cylindrical roller bearing according to claim 7, wherein the sensor adjusting frame is provided with a height adjusting structure, and the height adjusting structure is used for adjusting the height position of the displacement sensor on the sensor adjusting frame to adapt to the measurement requirements of bearings with different diameters; or/and
the sensor adjusting frame is provided with a longitudinal adjusting structure, and the longitudinal adjusting structure is used for adjusting the longitudinal position of the displacement sensor on the sensor adjusting frame to adapt to the measurement requirements of bearings with different widths.
9. The apparatus according to claim 8, wherein the height adjustment structure comprises a column on the sensor adjustment frame, the displacement sensor is fixed on a sensor mounting plate, the sensor mounting plate slides longitudinally along the column, and a jack screw is provided between the column and the sensor mounting plate.
10. The apparatus according to claim 8, wherein the longitudinal adjustment structure comprises a jack screw located between the movable base plate and a sensor adjustment frame, and the sensor adjustment frame is slidably connected with the movable base plate along the longitudinal direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210595969.2A CN114777706B (en) | 2022-05-30 | 2022-05-30 | High-precision measuring device for rotation precision of double-row cylindrical roller bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210595969.2A CN114777706B (en) | 2022-05-30 | 2022-05-30 | High-precision measuring device for rotation precision of double-row cylindrical roller bearing |
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| Publication Number | Publication Date |
|---|---|
| CN114777706A true CN114777706A (en) | 2022-07-22 |
| CN114777706B CN114777706B (en) | 2024-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210595969.2A Active CN114777706B (en) | 2022-05-30 | 2022-05-30 | High-precision measuring device for rotation precision of double-row cylindrical roller bearing |
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| CN (1) | CN114777706B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118066964A (en) * | 2024-04-19 | 2024-05-24 | 山东永翔特种轴承有限公司 | Tapered roller bearing precision measuring device |
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| CN207991489U (en) * | 2018-02-06 | 2018-10-19 | 洛阳轴承研究所有限公司 | A kind of running accuracy measuring device of bearing |
| CN209214577U (en) * | 2019-01-22 | 2019-08-06 | 昆山奥德鲁自动化技术有限公司 | A kind of radial internal clearance detection device |
| CN210375698U (en) * | 2019-07-02 | 2020-04-21 | 浙江百润轴承有限公司 | Device for checking flexibility of bearing |
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2022
- 2022-05-30 CN CN202210595969.2A patent/CN114777706B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118066964A (en) * | 2024-04-19 | 2024-05-24 | 山东永翔特种轴承有限公司 | Tapered roller bearing precision measuring device |
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| Publication number | Publication date |
|---|---|
| CN114777706B (en) | 2024-04-05 |
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