CN115298473B - Diagnostic device for bearing device - Google Patents
Diagnostic device for bearing device Download PDFInfo
- Publication number
- CN115298473B CN115298473B CN202180022438.8A CN202180022438A CN115298473B CN 115298473 B CN115298473 B CN 115298473B CN 202180022438 A CN202180022438 A CN 202180022438A CN 115298473 B CN115298473 B CN 115298473B
- Authority
- CN
- China
- Prior art keywords
- bearing
- temperature sensor
- gear
- temperature
- lubricating oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000010687 lubricating oil Substances 0.000 claims abstract description 27
- 239000003921 oil Substances 0.000 claims abstract description 26
- 230000002159 abnormal effect Effects 0.000 claims abstract description 8
- 238000003745 diagnosis Methods 0.000 claims abstract description 4
- 238000002485 combustion reaction Methods 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 8
- 230000005856 abnormality Effects 0.000 description 12
- 238000005461 lubrication Methods 0.000 description 8
- 239000000314 lubricant Substances 0.000 description 5
- 238000011144 upstream manufacturing Methods 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000009419 refurbishment Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/12—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load
- F16C17/24—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load with devices affected by abnormal or undesired positions, e.g. for preventing overheating, for safety
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N29/00—Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditions; Use of devices responsive to conditions in lubricating arrangements or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N29/00—Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditions; Use of devices responsive to conditions in lubricating arrangements or systems
- F16N29/04—Special means in lubricating arrangements or systems providing for the indication or detection of undesired conditions; Use of devices responsive to conditions in lubricating arrangements or systems enabling a warning to be given; enabling moving parts to be stopped
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N31/00—Means for collecting, retaining, or draining-off lubricant in or on machines or apparatus
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Sliding-Contact Bearings (AREA)
- Rolling Contact Bearings (AREA)
Abstract
A diagnostic device for a bearing device (1) is provided with a gear (3), a slide bearing (4) rotatably supporting the gear, and an oil passage (6) for supplying lubricating oil to a bearing surface (5) of the slide bearing. The diagnostic device is provided with: a first temperature sensor (51) that detects the temperature of the lubricating oil before being supplied to the bearing surface; a second temperature sensor (52) that detects the temperature of the lubricating oil after passing through the bearing surface; and a diagnosis unit (100) configured to determine that the bearing device is abnormal when a difference between temperatures detected by the first temperature sensor and the second temperature sensor is equal to or greater than a predetermined threshold value and a state in which the difference between the temperatures is equal to or greater than the predetermined threshold value continues for a predetermined time or longer.
Description
Technical Field
The present disclosure relates to a diagnostic device for a bearing device.
Background
For example, an internal combustion engine is provided with a power transmission mechanism that transmits power from a crankshaft to a camshaft. In the case where the power transmission mechanism is of a gear type, a bearing device is provided in the power transmission mechanism, and the bearing device includes a gear, a slide bearing rotatably supporting the gear, and an oil passage for supplying lubricating oil to a bearing surface of the slide bearing.
Prior art literature
Patent literature
Patent document 1: japanese patent laid-open No. 5-202930
Disclosure of Invention
Technical problem to be solved by the invention
If an abnormality occurs in the bearing device due to lubrication failure, there is a possibility that the bearing device may develop into a failure such as sintering of the gear and the sliding bearing. It is desirable to detect anomalies in the bearing arrangement immediately before such a failure has evolved.
The purpose of the present disclosure is to provide a diagnostic device for a bearing device, which can immediately detect an abnormality of the bearing device.
Technical means for solving the technical problems
A diagnostic device of a bearing device according to an aspect of the present disclosure,
is a diagnostic device for a bearing device comprising a gear, a slide bearing rotatably supporting the gear, and an oil passage for supplying lubricating oil to a bearing surface of the slide bearing,
the device is provided with:
a first temperature sensor that detects a temperature of the lubricating oil before being supplied to the bearing surface;
a second temperature sensor that detects a temperature of the lubricating oil after passing through the bearing surface; and
and a diagnosis unit configured to determine that the bearing device is abnormal when a difference between temperatures detected by the first temperature sensor and the second temperature sensor is equal to or greater than a predetermined threshold value, and a state in which the difference between the temperatures is equal to or greater than the predetermined threshold value is continued for a predetermined time or longer.
Preferably, the second temperature sensor is disposed at a position contacting with the lubricating oil dropped after passing through the bearing surface.
Preferably, the bearing device is provided in a power transmission mechanism of an internal combustion engine.
Effects of the invention
According to the diagnostic device of the bearing device of the present disclosure, an abnormality of the bearing device can be immediately detected.
Drawings
Fig. 1 is a schematic diagram showing a diagnostic device of a bearing device.
FIG. 2 is a flow chart of a diagnostic routine.
Detailed Description
Embodiments of the present disclosure are described below with reference to the drawings. Further, it is to be noted that the present disclosure is not limited to the following embodiments.
Fig. 1 is a schematic diagram showing a diagnostic device of a bearing device according to the present embodiment. The bearing device is applied to an internal combustion engine (also referred to as an engine), and particularly to a power transmission mechanism that transmits power from a crankshaft to a camshaft in the internal combustion engine. In the present embodiment, the internal combustion engine is a diesel engine for a vehicle, and the vehicle is a large vehicle such as a truck. However, the type and application of the vehicle and the internal combustion engine are not particularly limited.
For convenience, the directions of front, rear, left, right, up, down are defined as shown in the figure. However, it should be noted that these directions are only directions determined for convenience of explanation. In the case of the present embodiment, these directions coincide with the directions of the vehicle and the engine.
The bearing device 1 is provided at the rear surface portion of the engine body 2. The engine body 2 includes a cylinder block, a crankcase, and a cylinder head, and the bearing device 1 of the present embodiment is provided in the crankcase. The bearing device 1 includes a gear 3, a slide bearing 4 rotatably supporting the gear 3, and an oil passage 6 for supplying lubricating oil (a part of which is denoted by symbol O) to a bearing surface 5 of the slide bearing 4.
In the case of the present embodiment, the gear 3 is an idle gear, and is engaged with and disposed between an upstream side gear 7 on the upstream side in the driving force transmission direction and a downstream side gear 8 on the downstream side.
The slide bearing 4 is a substantially cylindrical member, also called a bush, and is inserted into the center portion of the gear 3. The slide bearing 4 has a central axis C extending in the front-rear direction, and rotatably supports the inner peripheral surface 9 of the gear 3 in the radial direction by a bearing surface 5 on the outer peripheral side thereof. The bearing surface 5 and the inner peripheral surface 9 form a bearing portion 10. The slide bearing 4 is fixed to the rear surface portion of the engine body 2 by a bolt 11 inserted through the center portion thereof. Further, the slide bearing 4 and the engine body 2 are provided with engagement portions (e.g., grooves and protrusions) that stop the slide bearing 4 from rotating when the slide bearing 4 is fixed by the bolts 11.
A flange portion 12 is integrally formed at the front end portion of the slide bearing 4, and the flange portion 12 supports the front surface portion 3A of the gear 3 in the thrust direction. A washer 13 is interposed between the bolt 11 and the slide bearing 4, and the washer 13 supports the rear surface portion 3B of the gear 3 in the thrust direction.
The oil passage 6 includes an in-body oil passage 14 formed in the engine body 2 and an in-bearing oil passage 15 formed in the slide bearing 4. An oil passage 16 as a lubricant reservoir is provided upstream of the in-body oil passage 14 in the lubricant flow direction, and lubricant is supplied from the oil passage 16 to the in-body oil passage 14. The oil passage 16 is formed inside the engine body 2 (e.g., crankcase).
The bearing inner oil passage 15 is formed in an L-shape, an upstream end thereof is connected to the in-body oil passage 14, and a downstream end thereof is opened at the bearing surface 5. Thereby, the lubricating oil supplied from the oil passage 16 to the in-body oil passage 14 flows through the bearing-internal oil passage 15, and is supplied to the bearing portion 10. Then, the bearing portion 10 is lubricated by the lubricating oil.
The lubricating oil lubricates a thrust sliding portion between the flange portion 12 on the front side and the front surface portion 3A of the gear 3, and then flows down along the front surface portion 3A of the gear 3, and drops downward as indicated by a symbol O. The lubricating oil lubricates a thrust sliding portion between the rear washer 13 and the rear surface portion 3B of the gear 3, and then flows down along the rear surface portion 3B of the gear 3, and is supplied to a meshing portion with the upstream gear 7, or drops downward.
On the other hand, the diagnostic device 50 includes: a first temperature sensor 51 that detects the temperature of the lubricating oil before being supplied to the bearing surface 5; a second temperature sensor 52 that detects the temperature of the lubricating oil after passing through the bearing surface 5; and a diagnostic unit that determines whether the bearing device 1 is abnormal. In the case of the present embodiment, the diagnostic unit is constituted by an electronic control unit (referred to as ECU) 100 for controlling the engine. The ECU100 is configured to determine that the bearing device 1 is abnormal when the difference between the temperatures detected by the first temperature sensor 51 and the second temperature sensor 52 is equal to or greater than a predetermined threshold value, and the state in which the difference between the temperatures is equal to or greater than the predetermined threshold value continues for a predetermined time or longer.
The first temperature sensor 51 is provided in the oil passage 16, and detects the temperature of the lubricating oil in the oil passage 16. The second temperature sensor 52 is disposed below the bearing portion 10, specifically, at a position in contact with the lubricating oil O dropped from the front surface portion 3A of the gear 3 after the lubrication of the bearing portion 10 and the front thrust sliding portion is completed. That is, the second temperature sensor 52 is disposed immediately below the front surface portion 3A of the gear 3. The second temperature sensor 52 is formed in an axial shape, is disposed in an orientation perpendicular to the central axis C, and is supported by the engine body 2 at a position outside the drawing.
These first temperature sensor 51 and second temperature sensor 52 are connected to the ECU 100. The ECU100 is also connected to a warning device 53 for warning a user of the vehicle or the like. The warning device 53 may be constituted by any device such as a warning lamp, an alarm, or an information display.
If an abnormality occurs in the bearing device 1 due to lubrication failure, there is a possibility that the gear 3 and the slide bearing 4 may be burned or the like. It is desirable to detect an abnormality of the bearing device 1 immediately before such a failure is developed.
Specifically, as a cause of lubrication failure in the bearing portion 10 of the bearing device 1, there is used, for example, a deteriorated lubricant or a failure of a driven member (auxiliary equipment or the like) driven via the gear 3. If this lubrication failure occurs, the amount of lubricating oil in the bearing portion 10 becomes small, the sliding resistance of the bearing portion 10 becomes high, and the bearing portion 10 heats up and the temperature thereof increases. In this way, there is a possibility that the gear 3 and the slide bearing 4 may be sintered to fail. In addition, the engine itself may malfunction due to overload due to the sintering.
In any case, if the gear 3 is sintered, a serious failure occurs in which the engine is disassembled and the engine must be replaced more seriously. The present embodiment is to detect abnormalities in the bearing device 1 immediately before such severe failure occurs, and thereby to significantly reduce the probability of occurrence of severe failure.
If lubrication failure of the bearing portion 10 occurs, the second temperature T2 detected by the second temperature sensor 52 is greatly increased relative to the first temperature T1 detected by the first temperature sensor 51. This is because the lubricant that has dropped onto the second temperature sensor 52 through the bearing portion 10 is higher than normal. Therefore, in the present embodiment, when the temperature difference Δt=t2—t1, which is the difference between the first temperature T1 and the second temperature T2, is equal to or greater than the predetermined threshold Δts, it is determined that there is a precursor of sintering, and this is taken as the first condition for determining abnormality of the bearing device 1.
On the other hand, although not abnormal, the temperature difference Δt temporarily becomes equal to or greater than the threshold Δts for some reason. In the present embodiment, in order to prevent erroneous determination in such a case, a state in which the temperature difference Δt is equal to or greater than the threshold Δts is continued for a predetermined time or longer is used as the second condition for determining abnormality of the bearing device 1.
The threshold value Δts of the temperature difference is set to a value equal to the minimum value of the temperature difference Δt experimentally obtained when lubrication failure of the bearing portion 10 occurs, for example. The predetermined time is, for example, a time when the temperature difference Δt temporarily becomes equal to or greater than the threshold Δts although lubrication failure of the bearing portion 10 does not occur, and is set to a value equal to the maximum value of the time obtained by the experiment.
Next, a routine of diagnosis according to the present embodiment will be described with reference to fig. 2. The illustrated routine is repeatedly executed by the ECU100 for each predetermined calculation cycle τ.
In step S101, the ECU100 acquires the first temperature T1 and the second temperature T2 detected by the first temperature sensor 51 and the second temperature sensor 52, respectively.
In step S102, the ECU100 calculates a temperature difference Δt=t2-T1 from the values of the first temperature T1 and the second temperature T2.
In step S103, the ECU100 determines whether the calculated temperature difference Δt is equal to or greater than a predetermined threshold Δts.
If the threshold Δts is equal to or greater than the threshold Δts, the ECU100 proceeds to step S104 to count the value (timer value) TM of the built-in timer.
Next, in step S105, the ECU100 determines whether the timer value TM is equal to or greater than a predetermined value TMs corresponding to the predetermined time.
If the temperature is equal to or higher than the predetermined value TMs, the ECU100 proceeds to step S106, determines that the bearing device 1 is abnormal, activates (turns on) the warning device 53, and ends the routine. This can prompt a user of the vehicle or the like to check and repair.
By immediately performing inspection refurbishment in response to a warning by a user of the vehicle or the like, it is possible to investigate and remove the cause of the abnormality before the gear 3 is actually sintered. Therefore, the cause can be eliminated before the serious failure occurs, and the probability of occurrence of the serious failure can be greatly reduced.
On the other hand, in the case where the timer value TM is smaller than the predetermined value TMs in step S105, the ECU100 directly ends the routine. Thereby, the timer value TM is maintained as the current value.
In addition, in the case where the temperature difference Δt is smaller than the threshold Δts in step S103, the ECU100 proceeds to step S107, and the routine is ended after the timer value TM is reset.
Before the timer value MT in counting becomes the predetermined value TMs, the temperature difference Δt is less than the threshold Δts in step S103, and the timer value TM may be reset. This case is a case where the bearing device 1 is normal but the temperature difference Δt temporarily becomes equal to or greater than the threshold Δts for some reason, and then returns to less than the threshold Δts. Therefore, in this case, in order to prevent erroneous determination, the timer value TM is reset, and the counting of the timer value TM is also stopped.
In the case where step S106 is not performed, the ECU100 substantially determines that the bearing device 1 is not abnormal, that is, normal.
As described above, according to the present embodiment, the abnormality of the bearing device 1 can be immediately detected. Further, it is possible to prevent the occurrence of serious failure due to such abnormality in advance.
While the embodiments of the present disclosure have been described in detail above, other various embodiments and modifications of the present disclosure are also contemplated.
(1) For example, the bearing device may be applied to a portion other than the power transmission device of the internal combustion engine, or may be applied to a mechanical device other than the internal combustion engine.
(2) The temperature detection portions of the first temperature sensor 51 and the second temperature sensor 52 are not limited to the above. For example, the first temperature sensor 51 may detect the temperature of the lubricating oil that connects the oil passage 16 and the oil passage in the body oil passage 14, or may detect the temperature of the lubricating oil in the body oil passage 14 or the bearing inner oil passage 15. The second temperature sensor 52 may be in contact with the lubricating oil O scattered from the rotating gear 3 to detect the temperature of the lubricating oil O. The second temperature sensor 52 may be disposed at an arbitrary height position, or may be disposed at a position in front of or behind the gear 3.
The embodiments of the present disclosure are not limited to the above-described embodiments, and all modifications, applications, and equivalents included in the idea of the present disclosure defined by the scope of protection are included in the present disclosure. Accordingly, the present disclosure should not be interpreted in a limiting manner, but can be applied to any other technique within the scope of the idea of the present disclosure.
The present application is based on the Japanese patent application of 19 th month 3 2020 (Japanese patent application 2020-049750), the contents of which are incorporated herein by reference.
Industrial applicability
The diagnostic device of the bearing device of the present disclosure can be widely applied to a diagnostic device that immediately detects an abnormality of the bearing device.
Description of the reference numerals
1. Bearing device
3. Gear wheel
4. Sliding bearing
5. Bearing surface
6. Oil path
51. First temperature sensor
52. Second temperature sensor
100. Electronic Control Unit (ECU)
O lubricating oil
Claims (2)
1. A diagnostic device for a bearing device including a gear, a slide bearing rotatably supporting the gear, and an oil passage for supplying lubricating oil to a bearing surface of the slide bearing, the diagnostic device comprising:
a first temperature sensor that detects a temperature of the lubricating oil before being supplied to the bearing surface;
a second temperature sensor that detects a temperature of the lubricating oil after passing through the bearing surface; and
a diagnosis unit configured to determine that the bearing device is abnormal when a difference between temperatures detected by the first temperature sensor and the second temperature sensor is equal to or greater than a predetermined threshold value and a state in which the difference between temperatures is equal to or greater than the predetermined threshold value continues for a predetermined time or longer,
the second temperature sensor is disposed at a position where it contacts the lubricating oil dropped after passing through the bearing surface.
2. The diagnostic device of bearing device according to claim 1,
the bearing device is arranged on a power transmission mechanism of the internal combustion engine.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020-049750 | 2020-03-19 | ||
| JP2020049750A JP7384085B2 (en) | 2020-03-19 | 2020-03-19 | Diagnostic device for bearing equipment |
| PCT/JP2021/010503 WO2021187452A1 (en) | 2020-03-19 | 2021-03-16 | Diagnostic device for bearing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115298473A CN115298473A (en) | 2022-11-04 |
| CN115298473B true CN115298473B (en) | 2024-02-23 |
Family
ID=77770916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202180022438.8A Active CN115298473B (en) | 2020-03-19 | 2021-03-16 | Diagnostic device for bearing device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7384085B2 (en) |
| CN (1) | CN115298473B (en) |
| WO (1) | WO2021187452A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60205098A (en) * | 1984-03-28 | 1985-10-16 | Toshiba Corp | Bearing lubricating sequential controller |
| CN1033682A (en) * | 1987-08-18 | 1989-07-05 | 株式会社高野 | The lubrication monitoring apparatus that machine is used |
| JPH02204147A (en) * | 1989-01-31 | 1990-08-14 | Komatsu Ltd | Monitoring device for vehicle |
| JPH05202930A (en) * | 1991-03-15 | 1993-08-10 | Osaka Gas Co Ltd | Abnormality monitoring method and apparatus for bearing |
| CN101182901A (en) * | 2006-11-15 | 2008-05-21 | 大隈株式会社 | Main-shaft lubrication device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56163707U (en) * | 1980-05-08 | 1981-12-04 |
-
2020
- 2020-03-19 JP JP2020049750A patent/JP7384085B2/en active Active
-
2021
- 2021-03-16 CN CN202180022438.8A patent/CN115298473B/en active Active
- 2021-03-16 WO PCT/JP2021/010503 patent/WO2021187452A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60205098A (en) * | 1984-03-28 | 1985-10-16 | Toshiba Corp | Bearing lubricating sequential controller |
| CN1033682A (en) * | 1987-08-18 | 1989-07-05 | 株式会社高野 | The lubrication monitoring apparatus that machine is used |
| JPH02204147A (en) * | 1989-01-31 | 1990-08-14 | Komatsu Ltd | Monitoring device for vehicle |
| JPH05202930A (en) * | 1991-03-15 | 1993-08-10 | Osaka Gas Co Ltd | Abnormality monitoring method and apparatus for bearing |
| CN101182901A (en) * | 2006-11-15 | 2008-05-21 | 大隈株式会社 | Main-shaft lubrication device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7384085B2 (en) | 2023-11-21 |
| CN115298473A (en) | 2022-11-04 |
| WO2021187452A1 (en) | 2021-09-23 |
| JP2021148227A (en) | 2021-09-27 |
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