CN211769498U - Manual hydraulic torsion expansion shaft - Google Patents
Manual hydraulic torsion expansion shaft Download PDFInfo
- Publication number
- CN211769498U CN211769498U CN201921890325.6U CN201921890325U CN211769498U CN 211769498 U CN211769498 U CN 211769498U CN 201921890325 U CN201921890325 U CN 201921890325U CN 211769498 U CN211769498 U CN 211769498U
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- oil
- expansion
- manual hydraulic
- ratchet wheel
- piston
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- 230000007246 mechanism Effects 0.000 claims abstract description 47
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000007789 sealing Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 83
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000000605 extraction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 210000003739 neck Anatomy 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of an expansion shaft, in particular to a manual hydraulic torsion expansion shaft, which comprises a torsion expansion mechanism and a hydraulic power mechanism; the torsion expansion mechanism comprises a main shaft body and a rotating shaft arranged in the main shaft body; a plurality of expansion key bars are movably arranged on the main shaft body; the hydraulic power mechanism comprises an outer oil cylinder and an inner oil cylinder; the output end of the outer piston is connected with a sliding ratchet wheel used for being meshed with the fixed ratchet wheel; the sliding ratchet wheel is sleeved outside the rotating shaft in a sliding manner; the manual hydraulic torsion expansion shaft further comprises a pressure oil mechanism. The utility model adopts an internal oil storage mode, does not need an external power source, is convenient to install and expands the application range; the ratchet locking mechanism is arranged on the rotating shaft, so that the requirement of the whole system on sealing is greatly reduced, and the reliability and the safety of the whole system are improved; the supporting points of the rotating shaft are uniformly and densely arranged, the radial precision and the axial rigidity of the main shaft body are improved, and the using effect is better.
Description
Technical Field
The utility model relates to a manual hydraulic pressure twists reverse mandril that expands.
Background
The expansion shaft is a general name of a shaft with the shaft outer diameter capable of changing within a certain range, and is widely applied to occasions needing frequent dismounting of the shaft outer sleeve, such as a winding and unwinding mechanism, a multi-blade cutting mechanism and the like. The expansion shaft is more in variety and structure, can be divided into an air expansion shaft, a hydraulic expansion shaft and a mechanical expansion shaft according to expansion power sources, and can be divided into a spline type expansion shaft and a floating pin type expansion shaft according to structural forms. The existing expansion shafts with known structures need to be provided with external energy sources such as hydraulic oil, compressed air and the like for expansion, and cannot be used under the condition that no external energy source is supplied. At present, the existing compressed air and hydraulic structure expansion shafts generally only utilize a sealing element of a power mechanism to perform pressure maintaining expansion, the mode has high requirement on the sealing performance of the power mechanism, once a sealing system leaks, the expansion force is rapidly reduced, potential safety hazards exist, and the expansion shaft is more serious particularly under the working condition of long-time expansion.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the shortcoming described above, provide a manual hydraulic pressure twists reverse the mandril that expands.
In order to achieve the above purpose, the specific scheme of the utility model is as follows: a manual hydraulic torsion expansion shaft comprises a torsion expansion mechanism and a hydraulic power mechanism; the torsion expansion mechanism comprises a main shaft body and a rotating shaft arranged in the main shaft body; the rotating shaft is rotatably connected with the main shaft body; a plurality of expansion key bars are movably arranged on the main shaft body; the rotating shaft drives the expansion key strips to protrude out of the main shaft body through rotation; a fixed ratchet wheel is fixedly sleeved outside the rotating shaft;
the hydraulic power mechanism comprises an outer oil cylinder and an inner oil cylinder; the outer oil cylinder comprises an outer cylinder body and an outer piston; the inner oil cylinder comprises an inner cylinder body and an inner piston; the outer piston is sleeved outside the inner cylinder body; the output end of the outer piston is connected with a sliding ratchet wheel used for being meshed with the fixed ratchet wheel; the sliding ratchet wheel is sleeved outside the rotating shaft in a sliding manner; the manual hydraulic torsion tensioning shaft further comprises a rotating mechanism for driving the inner piston to rotate;
the manual hydraulic torsion expansion shaft also comprises a pressure oil mechanism; the oil pressing mechanism is used for controlling the outer oil cylinder and the inner oil cylinder to work; the oil pressing mechanism is provided with a handle.
The utility model is further arranged in that the rotating mechanism comprises a flange fixedly connected with the main shaft body, an end cover fixedly connected with the flange, a movable groove arranged in the end cover, a steel ball fixed in the movable groove and a spiral groove arranged on the inner piston; the inner piston movably penetrates through the flange and the end cover; the steel ball is used for sliding in the spiral groove; the sliding ratchet wheel and the fixed ratchet wheel are arranged in the flange.
The utility model discloses further set up as, be connected with the driving lever between outer piston and the slip ratchet.
The utility model discloses further set up to, be equipped with reset spring between slip ratchet and the fixed ratchet.
The utility model is further provided with a boss arranged on the rotating shaft; an involute spiral notch is formed in the boss; the expansion key bar is provided with a clamping block; the fixture block is provided with a pin shaft used for moving on the involute spiral notch.
The utility model discloses further set up to, be equipped with the bearing between pivot and the main shaft body.
The utility model is further arranged in that the oil pressing mechanism comprises an oil pressing cylinder body; the pressure oil cylinder body is provided with an oil storage chamber, a pressure oil chamber and a pressure oil piston movably arranged in the pressure oil chamber in a penetrating way; the pressure oil piston is connected with the handle.
The utility model is further arranged in that the outer cylinder body comprises a first rodless cavity arranged at one end of the outer piston and a first rod cavity arranged at the other end of the outer piston; the pressure oil cylinder body is provided with a first one-way valve for controlling the communication between the oil storage chamber and the pressure oil chamber; the pressure oil cylinder body is provided with a second one-way valve for controlling the communication between the pressure oil chamber and the first rodless cavity; the pressure oil cylinder body is provided with a third one-way valve used for controlling the communication between the pressure oil chamber and the first rod cavity.
The utility model is further arranged that the inner cylinder body comprises a second rodless cavity arranged at one end of the inner piston and a second rod cavity arranged at the other end of the inner piston; a fourth one-way valve is arranged between the first rodless cavity and the second rod cavity; and a fifth one-way valve is arranged between the first rod cavity and the second rodless cavity.
The utility model discloses further set up to, the pressure oil cylinder body is equipped with oil feed switching-over valve and oil extraction switching-over valve.
The utility model has the advantages that: 1. an internal oil storage mode is adopted, an external power source is not needed, the installation is convenient, and the application range is expanded; 2. the ratchet locking mechanism is arranged on the rotating shaft, so that the requirement of the whole system on sealing is greatly reduced, and the reliability and the safety of the whole system are improved; 3. the supporting points of the rotating shaft are uniformly and densely arranged, the radial precision and the axial rigidity of the main shaft body are improved, and the using effect is better.
Drawings
The invention is further described with the aid of the accompanying drawings, in which, however, the embodiments do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be derived from the following drawings without inventive effort.
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of the hydraulic power mechanism and the flange of the present invention after being hidden;
FIG. 3 is a schematic structural view of the spindle body shown in FIG. 2 after being hidden;
fig. 4 is a cross-sectional view of the present invention;
fig. 5 is a schematic structural view of the hydraulic power mechanism of the present invention;
fig. 6 is a cross-sectional view of the hydraulic power mechanism and the oil pressing mechanism of the present invention;
fig. 7 is a sectional view of the oil pressing mechanism of the present invention;
wherein: 1-a main shaft body; 11-a flange; 12-a bearing; 2-a rotating shaft; 21-fixed ratchet wheel; 22-a boss; 23-involute spiral slot; 3-expanding the key bars; 31-a cartridge; 32-a pin shaft; 4-an outer cylinder body; 41-outer piston; 42-a sliding ratchet wheel; 43-a driving lever; 44-a return spring; 45-a first rod chamber; 46-a first rod chamber; 5-inner cylinder body; 51-an inner piston; 52-helical groove; 53-a second rodless cavity; 54-a second rod chamber; 6-end cover; 61-a movable groove; 62-steel ball; 7-pressing the oil cylinder body; 71-oil storage chamber; 72-a pressure oil chamber; 73-a hydraulic oil piston; 74-a handle; 81-a first one-way valve; 82-a second one-way valve; 83-a third one-way valve; 85-a fifth one-way valve; 91-an oil inlet reversing valve; 92-oil drain change valve.
Detailed Description
The following detailed description of the present invention, taken in conjunction with the accompanying drawings and specific examples, is not intended to limit the scope of the invention.
As shown in fig. 1 to 7, the manual hydraulic twisting and tightening shaft according to the present embodiment includes a twisting and tightening mechanism and a hydraulic power mechanism; the torsion expansion mechanism comprises a main shaft body 1 and a rotating shaft 2 arranged in the main shaft body 1; the rotating shaft 2 is rotatably connected with the main shaft body 1; a plurality of expansion key bars 3 are movably arranged on the main shaft body 1; the rotating shaft 2 is rotationally driven to stretch out of the main shaft body 1 through the expansion key strips 3; a fixed ratchet wheel 21 is fixedly sleeved outside the rotating shaft 2;
the hydraulic power mechanism comprises an outer oil cylinder and an inner oil cylinder; the outer oil cylinder comprises an outer cylinder body 4 and an outer piston 41; the inner oil cylinder comprises an inner cylinder body 5 and an inner piston 51; the outer piston 41 is sleeved outside the inner cylinder 5; the output end of the outer piston 41 is connected with a sliding ratchet wheel 42 which is used for being meshed with the fixed ratchet wheel 21; the sliding ratchet wheel 42 is sleeved outside the rotating shaft 2 in a sliding manner; the manual hydraulic torsion tensioning shaft further comprises a rotating mechanism for driving the inner piston 51 to rotate;
the manual hydraulic torsion expansion shaft also comprises a pressure oil mechanism; the oil pressing mechanism is used for controlling the outer oil cylinder and the inner oil cylinder to work; the oil pressing mechanism is provided with a handle 74. In the manual hydraulic torsion expansion shaft of the present embodiment, the rotating shaft 2 is provided with a boss 22; an involute spiral notch 23 is formed in the boss 22; the expansion key strip 3 is provided with a clamping block 31; the latch 31 is provided with a pin 32 for moving on the involute spiral notch 23. In the manual hydraulic torsion expanding shaft according to the embodiment, a bearing 12 is arranged between the rotating shaft 2 and the main shaft body 1.
Specifically, in the manual hydraulic torsion expanding shaft according to the embodiment, the shaft necks at the two ends of the rotating shaft 2 are sleeved in the center of the main shaft body 1 through the bearings 12 and can coaxially rotate around the main shaft body 1, a plurality of circular bosses 22 are uniformly distributed on the rotating shaft 2, and a plurality of involute spiral notches 23 are uniformly distributed on the bosses 22; the main shaft body 1 is provided with a plurality of strip-shaped through grooves, the expansion key strip 3 is sleeved in the strip-shaped through grooves of the main shaft body 1 in a penetrating manner, the bottom of the expansion key strip 3 is connected with a plurality of clamping blocks 31 through screws, and the clamping blocks 31 are hung on the involute spiral groove openings 23 through pin shafts 32. When the rotating shaft 2 rotates, the pin shaft 32 on the clamping block 31 is matched with the involute spiral notch 23 to drive the expansion key strip 3 to slide in the strip-shaped through groove of the main shaft body 1, so that the change of the shaft diameter of the expansion key strip 3 is realized, and the external shaft sleeve is expanded.
In the manual hydraulic torsion tensioning shaft according to the embodiment, the rotating mechanism includes a flange 11 fixedly connected with the main shaft body 1, an end cover 6 fixedly connected with the flange 11, a movable groove 61 arranged in the end cover 6, a steel ball 62 fixed in the movable groove 61, and a spiral groove 52 arranged on the inner piston 51; the inner piston 51 is movably arranged in the flange 11 and the end cover 6 in a penetrating way; the steel ball 62 is used for sliding in the spiral groove 52; the sliding ratchet wheel 42 and the fixed ratchet wheel 21 are both arranged in the flange 11.
In the manual hydraulic torsion expansion shaft according to the present embodiment, a shift lever 43 is connected between the outer piston 41 and the sliding ratchet 42.
In the manual hydraulic torsion expanding shaft according to the present embodiment, a return spring 44 is provided between the sliding ratchet 42 and the fixed ratchet 21.
According to the manual hydraulic torsion expansion shaft, the oil pressing mechanism comprises an oil pressing cylinder body 7; the oil pressing cylinder body 7 is provided with an oil storage chamber 71, an oil pressing chamber 72 and an oil pressing piston 73 movably arranged in the oil pressing chamber 72 in a penetrating way; the pressure oil piston 73 is connected to a handle 74.
In the manual hydraulic torsion expansion shaft according to the embodiment, the outer cylinder 4 includes a first rodless cavity 45 disposed at one end of the outer piston 41 and a first rod cavity 46 disposed at the other end of the outer piston 41; the oil cylinder body 7 is provided with a first one-way valve 81 for controlling the communication between the oil storage chamber 71 and the oil pressing chamber 72; the oil cylinder body 7 is provided with a second one-way valve 82 for controlling the oil pressing chamber 72 to be communicated with the first rod-free cavity 45; the cylinder block 7 is provided with a third check valve 83 for controlling the communication of the pressure oil chamber 72 with the first rod chamber 46.
In the manual hydraulic torsion tensioning shaft according to the embodiment, the inner cylinder 5 includes a second rodless cavity 53 disposed at one end of the inner piston 51 and a second rod cavity 54 disposed at the other end of the inner piston 51; a fourth check valve is arranged between the first rodless cavity 45 and the second rod cavity 54; a fifth check valve 85 is disposed between the first rod chamber 46 and the second rodless chamber 53.
In the manual hydraulic torsion expansion shaft according to this embodiment, the oil cylinder body 7 is provided with an oil inlet reversing valve 91 and an oil outlet reversing valve 92.
Specifically, the principle is as follows: when the oil-in reversing valve 91 and the oil-out reversing valve 92 are pulled to the oil inlet end simultaneously to connect an oil-in oil path, the handle 74 is pulled manually, so that oil in the oil storage chamber 71 is sucked into the oil pressing chamber 72 through the first one-way valve 81, then is pressurized and enters the first rodless cavity 45 of the outer oil cylinder through the second one-way valve 82, the outer piston 41 is pushed out, the shift lever 43 on the outer piston 41 is pushed out to push the sliding ratchet wheel 42 to be meshed with the fixed ratchet wheel 21, and finally, the rotating shaft 2 is locked by reverse rotation.
When the stroke of the outer piston 41 is ended, the oil pressure in the oil passage of the first rodless cavity 45 rises, the fourth one-way valve is opened, oil enters the second rod cavity 54 of the inner oil cylinder, the inner piston 51 is pushed to retract, the rotating shaft 2 is driven to rotate under the action of the spiral groove 52 and the steel ball 62, the involute spiral notch 23 in the rotating shaft 2 pushes out the expansion key strip 3, and the shaft sleeve is installed outside the expansion key strip 3. Due to the locking of the sliding ratchet wheel 42 and the fixed ratchet wheel 21, the pressure drop of the hydraulic system does not influence the expansion force of the expansion keybars 3 and the rotating shaft 2.
When the expansion key bar 3 needs to be loosened, the oil inlet reversing valve 91 and the oil outlet reversing valve 92 are simultaneously pulled to the oil outlet end, so that an oil outlet oil path is connected, the handle 74 is manually pulled, oil in the oil storage chamber 71 is sucked and pressurized through the first one-way valve 81 and then enters the first rod chamber 46 of the outer oil cylinder through the third one-way valve 83, so that the outer piston 41 is pushed to retract, the sliding ratchet wheel 42 is released from the fixed ratchet wheel 21, the sliding ratchet wheel 42 is separated from the fixed ratchet wheel 21 under the action of the return spring 44, and the rotating shaft 2 returns to a free rotating state.
With the stroke of the outer piston 41 of the outer cylinder ending, the pressure of the oil in the oil passage of the first rod chamber 46 rises, the fifth one-way valve 85 is opened, the oil enters the second rodless chamber 53 of the inner cylinder, the inner piston 51 is pushed to extend out, the rotating shaft 2 is driven to rotate reversely, and the expansion keybar 3 is retracted.
The embodiment adopts an internal oil storage mode, does not need an external power source, is convenient to install and expands the application range; in addition, the ratchet locking mechanism is arranged on the rotating shaft 2, so that the requirement of the whole system on sealing is greatly reduced, and the reliability and the safety of the whole system are improved; in addition, the supporting points of the rotating shaft 2 are uniformly and densely arranged, so that the radial precision and the axial rigidity of the main shaft body 1 are improved, and the using effect is better.
The above is only a preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles in accordance with the claims of the present invention are included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a manual hydraulic pressure twists reverse tight axle that expands which characterized in that: comprises a torsion expansion mechanism and a hydraulic power mechanism; the torsion expansion mechanism comprises a main shaft body (1) and a rotating shaft (2) arranged in the main shaft body (1); the rotating shaft (2) is rotatably connected with the main shaft body (1); a plurality of expansion key bars (3) are movably arranged on the main shaft body (1); the rotating shaft (2) is rotationally driven to stretch out of the main shaft body (1) in a protruding mode through the expansion key strips (3); a fixed ratchet wheel (21) is fixedly sleeved outside the rotating shaft (2); the hydraulic power mechanism comprises an outer oil cylinder and an inner oil cylinder; the outer oil cylinder comprises an outer cylinder body (4) and an outer piston (41); the inner oil cylinder comprises an inner cylinder body (5) and an inner piston (51); the outer piston (41) is sleeved outside the inner cylinder body (5); the output end of the outer piston (41) is connected with a sliding ratchet wheel (42) which is used for being meshed with the fixed ratchet wheel (21); the sliding ratchet wheel (42) is sleeved outside the rotating shaft (2) in a sliding manner; the manual hydraulic torsion tensioning shaft further comprises a rotating mechanism for driving the inner piston (51) to rotate;
the manual hydraulic torsion expansion shaft also comprises a pressure oil mechanism; the oil pressing mechanism is used for controlling the outer oil cylinder and the inner oil cylinder to work; the oil pressing mechanism is provided with a handle (74).
2. The manual hydraulic torsion expansion shaft according to claim 1, wherein: the rotating mechanism comprises a flange (11) fixedly connected with the main shaft body (1), an end cover (6) fixedly connected with the flange (11), a movable groove (61) arranged in the end cover (6), a steel ball (62) fixed in the movable groove (61) and a spiral groove (52) arranged on the inner piston (51); the inner piston (51) is movably arranged in the flange (11) and the end cover (6) in a penetrating way; the steel ball (62) is used for sliding in the spiral groove (52); the sliding ratchet wheel (42) and the fixed ratchet wheel (21) are arranged in the flange (11).
3. The manual hydraulic torsion expansion shaft according to claim 1, wherein: a deflector rod (43) is connected between the outer piston (41) and the sliding ratchet wheel (42).
4. The manual hydraulic torsion expansion shaft according to claim 1, wherein: a return spring (44) is arranged between the sliding ratchet wheel (42) and the fixed ratchet wheel (21).
5. The manual hydraulic torsion expansion shaft according to claim 1, wherein: a boss (22) is arranged on the rotating shaft (2); an involute spiral notch (23) is formed in the boss (22); the expansion key strip (3) is provided with a clamping block (31); the fixture block (31) is provided with a pin shaft (32) which is used for moving on the involute spiral notch (23).
6. The manual hydraulic torsion expansion shaft according to claim 1, wherein: and a bearing (12) is arranged between the rotating shaft (2) and the main shaft body (1).
7. The manual hydraulic torsion expansion shaft according to claim 1, wherein: the oil pressing mechanism comprises an oil pressing cylinder body (7); the oil pressing cylinder body (7) is provided with an oil storage chamber (71), an oil pressing chamber (72) and an oil pressing piston (73) movably arranged in the oil pressing chamber (72) in a penetrating way; the pressure oil piston (73) is connected with a handle (74).
8. The manual hydraulic torsion expansion shaft according to claim 7, wherein: the outer cylinder body (4) comprises a first rodless cavity (45) arranged at one end of the outer piston (41) and a first rod cavity (46) arranged at the other end of the outer piston (41); the oil pressing cylinder body (7) is provided with a first one-way valve (81) for controlling the communication between the oil storage chamber (71) and the oil pressing chamber (72); the oil pressing cylinder body (7) is provided with a second one-way valve (82) used for controlling the communication between the oil pressing chamber (72) and the first rodless cavity (45); the oil pressing cylinder body (7) is provided with a third one-way valve (83) used for controlling the oil pressing chamber (72) to be communicated with the first rod cavity (46).
9. The manual hydraulic torsion expansion shaft according to claim 8, wherein: the inner cylinder body (5) comprises a second rodless cavity (53) arranged at one end of the inner piston (51) and a second rod cavity (54) arranged at the other end of the inner piston (51); a fourth one-way valve is arranged between the first rodless cavity (45) and the second rod cavity (54); and a fifth one-way valve (85) is arranged between the first rod cavity (46) and the second rodless cavity (53).
10. The manual hydraulic torsion expansion shaft according to claim 7, wherein: the oil pressing cylinder body (7) is provided with an oil inlet reversing valve (91) and an oil discharge reversing valve (92).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921890325.6U CN211769498U (en) | 2019-11-05 | 2019-11-05 | Manual hydraulic torsion expansion shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921890325.6U CN211769498U (en) | 2019-11-05 | 2019-11-05 | Manual hydraulic torsion expansion shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211769498U true CN211769498U (en) | 2020-10-27 |
Family
ID=72963410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921890325.6U Expired - Fee Related CN211769498U (en) | 2019-11-05 | 2019-11-05 | Manual hydraulic torsion expansion shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211769498U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113977474A (en) * | 2021-09-30 | 2022-01-28 | 山西江淮重工有限责任公司 | Inner cavity tightening device |
-
2019
- 2019-11-05 CN CN201921890325.6U patent/CN211769498U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113977474A (en) * | 2021-09-30 | 2022-01-28 | 山西江淮重工有限责任公司 | Inner cavity tightening device |
| CN113977474B (en) * | 2021-09-30 | 2023-09-26 | 山西江淮重工有限责任公司 | Inner cavity tightening device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211229 Address after: 030000 300m north of Wisteria garden, xutan East Street, Xiaodian District, Taiyuan City, Shanxi Province Patentee after: SHANXI HAOSEN MACHINERY MANUFACTURING Co.,Ltd. Address before: 448000 office 023, pioneering office, 114 Yueyue Hubei Road (huofenghuang cloud base), Dongbao District, Jingmen City, Hubei Province Patentee before: Jingmen Heshuo Precision Machinery Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201027 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |