WO2017138365A1 - 変速機及び変速機を備えた駆動装置 - Google Patents
変速機及び変速機を備えた駆動装置 Download PDFInfo
- Publication number
- WO2017138365A1 WO2017138365A1 PCT/JP2017/002781 JP2017002781W WO2017138365A1 WO 2017138365 A1 WO2017138365 A1 WO 2017138365A1 JP 2017002781 W JP2017002781 W JP 2017002781W WO 2017138365 A1 WO2017138365 A1 WO 2017138365A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- end cover
- open end
- ring
- rotary housing
- foreign matter
- Prior art date
Links
Images
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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/029—Gearboxes; Mounting gearing therein characterised by means for sealing the gearboxes, e.g. to improve airtightness
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
Definitions
- the present invention relates to a transmission and a drive device including the transmission.
- JP2014-190444A discloses a transmission used for a traveling motor of an endless track vehicle such as a hydraulic excavator.
- the above transmission includes a cylindrical rotary housing to which a sprocket meshing with a crawler belt is coupled, and a disk-shaped open end cover that closes the open end of the rotary housing.
- the open end cover rotates via a wire disposed in a cylindrical space formed between an inner peripheral groove formed on the inner periphery of the rotary housing and an outer peripheral groove formed on the outer periphery of the open end cover. Locked to the housing.
- the inside of the rotary housing and the open end cover is filled with a transmission mechanism that decelerates the output rotation of the hydraulic motor and transmits it to the rotary housing, and is filled with lubricating oil that lubricates the transmission mechanism.
- a seal member O-ring is provided between the inner periphery of the rotating housing and the outer periphery of the open end cover to prevent the lubricating oil from leaking outside the rotating housing.
- the outer diameter of the wire for locking the open end cover to the rotary housing is smaller than the cylindrical space between the inner peripheral groove of the rotary housing and the outer peripheral groove of the open end cover. And set to have clearance. For this reason, the rotary housing and the open end cover can be relatively displaced in the axial direction by the clearance.
- the seal member also moves in the axial direction when the rotary housing and the open end cover are relatively displaced in the axial direction due to vibration or the like.
- An object of the present invention is to suppress entry of foreign matter into the vicinity of a seal member provided between a rotating housing and an open end cover.
- a transmission a transmission mechanism that changes the output rotation of a drive source
- a cylindrical rotary housing that houses the transmission mechanism and is rotated by transmission of the output rotation that is changed.
- An opening end cover that is fitted to the inner periphery of the opening end of the rotating housing and closes the opening end; a sealing member that seals between the inner periphery of the rotating housing and the outer periphery of the opening end cover;
- a transmission is provided that includes a blocking member that is provided on the opening end side and blocks a foreign matter that has entered from the outside between the inner periphery of the rotary housing and the outer periphery of the opening end cover.
- FIG. 1 is a side view of a transmission according to a first embodiment of the present invention.
- FIG. 2 is a sectional view taken along line II-II in FIG.
- FIG. 3 is an enlarged view of a main part of the transmission according to the first embodiment of the present invention.
- FIG. 4 is an enlarged view of a main part of a transmission according to a modification of the present invention.
- FIG. 5 is an enlarged view of a main part of the transmission according to the second embodiment of the present invention.
- the transmission 100 is used, for example, in a travel motor that is provided on an axle portion of a crawler type vehicle such as a hydraulic excavator and drives a crawler belt.
- a travel motor as a drive device includes a hydraulic motor 1 as a drive source and a transmission 100 that decelerates the output rotation of the shaft 21 of the hydraulic motor 1.
- the transmission 100 includes a cylindrical rotary housing 10 that rotates with respect to a fixed housing (not shown).
- a sprocket (not shown) is connected to the outer peripheral surface of the rotary housing 10.
- a crawler belt (not shown) that meshes with the sprocket circulates and the vehicle travels.
- the fixed housing and the rotating housing 10 are disposed inside the path through which the crawler belt circulates.
- the rotary housing 10 is rotatably supported via a bearing (not shown) with respect to a fixed housing connected to the vehicle frame, and rotates about the rotary shaft O.
- the hydraulic motor 1 is provided inside the fixed housing.
- the hydraulic motor 1 is, for example, a swash plate type piston motor.
- the drive source may be other than a hydraulic motor, and for example, an electric motor or the like may be used.
- the transmission mechanism 20 includes a sun gear 22 provided on the shaft 21 of the hydraulic motor 1, an inner gear 23 that is a ring gear provided on the inner wall of the rotary housing 10, a plurality of planetary gears 24 that mesh with both the sun gear 22 and the inner gear 23, and It is constituted by a planetary carrier 25 or the like that supports the planetary gear 24.
- the transmission mechanism 20 decelerates the output rotation of the shaft 21 of the hydraulic motor 1 and transmits it to the rotary housing 10. As a result, the sprocket rotates together with the rotating housing 10.
- a disc-shaped open end cover 30 that closes the open end 10a is fitted on the inner periphery of the open end 10a of the rotary housing 10.
- the open end cover 30 is formed between an inner peripheral groove 10 b formed on the inner periphery of the rotary housing 10 and an outer peripheral groove 30 a formed on the outer periphery of the open end cover 30.
- the rotary housing 10 is locked via a wire 40 disposed in a cylindrical space.
- the position of the inner peripheral groove 10b of the rotary housing 10 and the position of the outer peripheral groove 30a of the open end cover 30 are such that the open end cover 30 is fitted to the inner periphery of the rotary housing 10 and brought into contact with the end face of the inner gear 23.
- the inner circumferential groove 10b and the outer circumferential groove 30a are set to face each other to form a cylindrical space.
- the outer diameter of the wire 40 is smaller than the inner diameter of the cylindrical space formed by the inner circumferential groove 10b and the outer circumferential groove 30a.
- the wire 40 may be one made of a single metal wire, or may be a twisted wire in which a plurality of thin metal wires are collected.
- the wire 40 is inserted into the space formed by the inner peripheral groove 10b and the outer peripheral groove 30a from the through hole 10c in a state where the open end cover 30 is fitted to the inner periphery of the rotary housing 10. In this way, the wire 40 is disposed in the space between the inner circumferential groove 10b and the outer circumferential groove 30a so as to make one round around the opening end cover 30.
- the opening end cover 30 is locked to the rotary housing 10 via the wire 40, and the gear chamber 110 that houses the speed change mechanism 20 is defined in the rotary housing 10.
- the through hole 10c is sealed with a plug (not shown) after the wire 40 is inserted.
- the wire 40 may be extracted from the through hole 10c.
- the gear chamber 110 is filled with lubricating oil that lubricates the transmission mechanism 20.
- an O-ring 50 is provided between the rotary housing 10 and the open end cover 30 as a seal member that prevents the lubricating oil from leaking from the gear chamber 110 to the outside.
- the O-ring 50 is fitted into an O-ring groove 30b formed on the opening end 10a side of the outer peripheral groove 30a of the opening end cover 30.
- the O-ring 50 is compressed between the bottom surface of the O-ring groove 30 b and the inner peripheral surface of the rotary housing 10 to seal the gear chamber 110.
- the lubricating oil does not need to fill the entire space of the gear chamber 110, and the amount of lubricating oil charged in the gear chamber 110 is adjusted as appropriate.
- the transmission 100 is used for a traveling motor such as a hydraulic excavator, it is often used in an environment where foreign matter such as earth and sand is easily applied. For this reason, foreign matter such as earth and sand may enter the gap 120 between the rotary housing 10 and the open end cover 30.
- the outer diameter of the wire 40 for locking the open end cover 30 to the rotary housing 10 is between the inner peripheral groove 10 b of the rotary housing 10 and the outer peripheral groove 30 a of the open end cover 30. It is set to have a clearance with respect to the cylindrical space. For this reason, the rotary housing 10 and the open end cover 30 can be relatively displaced in the axial direction by the clearance.
- the O-ring 50 is also pivoted. Will move in the direction.
- the gap 120 is entered from the outside closer to the opening end 10a than the O-ring 50 between the rotary housing 10 and the opening end cover 30.
- a square ring 60 is provided as a damming member for damming the foreign matter.
- the square ring 60 is made of resin and is disposed adjacent to the O-ring 50 in the O-ring groove 30b.
- the square ring 60 is provided in a compressed state by the bottom surface of the O-ring groove 30 b and the inner peripheral surface of the rotary housing 10.
- the foreign matter that enters the gap 120 is particulate matter such as earth and sand.
- particulate matter such as earth and sand.
- the open end cover 30 and the square ring 60 come into contact with each other. It is difficult to pass through the contact portion between the square ring 60 and the rotary housing 10 and the contact portion between the square ring 60 and the open end cover 30. Therefore, foreign matter such as earth and sand that has entered the gap 120 from the outside can be effectively dammed, and entry of foreign matter near the O-ring 50 can be suppressed.
- the contact portion between the dam member and the rotary housing 10 and the dam can be increased. This is because the shape of the contact portion with the rotary housing 10 and the shape of the contact portion with the open end cover 30 in the square ring 60 are flat.
- the rotary housing 10 and the open end cover 30 are pivoted by the clearance between the wire 40 and the space between the inner peripheral groove 10b of the rotary housing 10 and the outer peripheral groove 30a of the open end cover 30. Relative displacement is possible in the direction.
- the damming member is the square ring 60 as in the present embodiment
- the rotary housing 10 and the open end cover 30 are relatively displaced in the axial direction, the square ring 60 as the damming member. Is difficult to roll.
- the square ring 60 slides on at least one of the rotary housing 10 and the open end cover 30. This is because, as described above, the shape of the contact portion of the square ring 60 with the rotary housing 10 and the shape of the contact portion with the open end cover 30 are flat.
- the sliding of the blocking member is, for example, the shape of the contact portion with the X ring or the rotary housing 10 and the open end cover 30.
- This can also be realized by using a D-ring whose only one of the shapes of the abutting portions is a plane as a dam member.
- the square ring 60 is made of a resin having a higher hardness than rubber or the like, so that it is difficult to roll when moved in the axial direction, and foreign matter accumulated in the vicinity is easily scraped off.
- the material of the square ring 60 is not limited to resin, and may be rubber or the like, for example.
- the effect of the blocking member blocking foreign matter increases as the clearance between the rotating housing 10 and the open end cover 30 and the blocking member decreases.
- the rotating housing 10 and the open end cover 30 and the damming member are not in contact with each other, it is possible to obtain an effect of damaging the foreign matter.
- the square ring 60 may be provided in a state where it is not compressed by the rotary housing 10 and the open end cover 30, or may be provided so as to contact only one of them and create a gap between the other.
- the width of the O-ring groove 30 b is such that the O-ring 50, the square ring 60, and the open end cover 30 are assembled to the rotary housing 10. It is set so as not to be in close contact with the end face of the ring groove 30b on the opening end 10a side.
- the square ring 60 is You may set so that it may contact
- the square ring 60 and the open end cover 30 abut on the end surface of the O ring groove 30b on the open end 10a side in addition to the bottom surface of the O ring groove 30b. Therefore, it is difficult for foreign matter to pass between the square ring 60 and the open end cover 30.
- Threaded portions are formed on the inner circumferences of the ports 31 to 33, and bolt-type plugs 34 are screwed together and attached thereto.
- the port 31 is an oil inspection port and is arranged at the center of the open end cover 30. By removing the plug 34 from the port 31, the amount of lubricating oil filled in the gear chamber 110 can be confirmed through the port 31.
- the port 32 is disposed below the open end cover 30 in FIG. By removing the plug 34 from the port 32, the lubricating oil in the gear chamber 110 can be discharged to the outside through the port 32.
- the port 33 is arranged in the upper right part of the open end cover 30 in FIG. By removing the plug 34 from the port 33, the lubricating oil can be filled into the gear chamber 110 through the port 33.
- the transmission 200 is different from the transmission 100 in terms of a blocking member and its arrangement.
- the description will focus on the differences from the transmission 100, and the same components as those of the transmission 100 will be denoted by the same reference numerals and description thereof will be omitted.
- an O-ring 50 as a sealing member and an O-ring 80 as a dam member are provided between the rotary housing 10 and the open end cover 70.
- the O-ring 50 is fitted in an O-ring groove 70 b formed on the opening end 10 a side with respect to the outer peripheral groove 70 a on the outer periphery of the opening end cover 70, and the O-ring 80 is connected to the outer periphery of the opening end cover 70.
- the O-ring is made of rubber, it has large elasticity and low rigidity. For this reason, when an O-ring is used as the dam member, if the seal member and the dam member are assembled in one groove like the transmission 100, the assemblability may not be ensured.
- the distance between the bottom surface of the O-ring groove 70c and the inner peripheral surface of the rotary housing 10 is set to be narrower than the optimum width with respect to the O-ring 80, and between the O-ring 80 and the bottom surface of the O-ring groove 70c.
- the pressing effect is increased between 80 and the inner peripheral surface of the rotary housing 10, and the rolling of the O-ring 80 is also reduced. Therefore, the effect of blocking foreign matter can be increased.
- the depth of the O-ring groove 70c may be made shallower.
- the transmissions 100 and 200 each include a transmission mechanism 20 that changes the output rotation of the hydraulic motor 1, a transmission mechanism 20, a cylindrical rotary housing 10 that rotates when the output rotation that has been changed is transmitted, and the rotary housing 10.
- An open end cover 30, 70 that is fitted to the inner periphery of the open end 10 a and closes the open end 10 a, and an O-ring that seals between the inner periphery of the rotary housing 10 and the outer periphery of the open end cover 30, 70.
- 50 and a blocking member (square ring) that is provided on the opening end 10a side of the O-ring 50 and blocks foreign matter that has entered from the outside between the inner periphery of the rotary housing 10 and the outer periphery of the opening end covers 30 and 70. 60, an O-ring 80).
- the blocking member square ring 60, O-ring 80 is provided in a state of being in contact with the rotary housing 10 and the open end covers 30, 70.
- the blocking member (square ring 60) is provided so as to slide in the axial direction when the rotary housing 10 and the open end cover 30 are relatively displaced in the axial direction.
- the blocking member is a square ring 60.
- the blocking member (square ring 60) and the rotating housing 10 are wide. Even if foreign matter enters between the two and between the blocking member (square ring 60) and the open end cover 30, the foreign matter is likely to be clogged halfway before completely passing through. Therefore, the foreign matter can be effectively dammed up.
- the output rotation of the hydraulic motor 1 is decelerated and transmitted to the rotary housing 10, but the output rotation may be increased and transmitted to the rotary housing 10.
- the O-rings 50 and 80 are used as the sealing member, but, for example, an X ring, a D ring, a square ring, or the like may be used.
- the square ring 60 is used as the dam member.
- an O ring, an X ring, a D ring, or the like may be used.
- the O-ring 80 is used as a dam member, you may use a square ring, X ring, D ring, etc., for example.
- the driving motor is described as an example of the driving device.
- the driving device can be applied to a motor for driving a turning motor or a winch.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Devices (AREA)
- General Details Of Gearings (AREA)
- Gasket Seals (AREA)
Abstract
Description
続いて、図5を参照しながら本発明の第2実施形態に係る変速機200について説明する。
Claims (5)
- 駆動源の出力回転を変速する変速機構と、
前記変速機構を収容し、変速された前記出力回転が伝達されて回転する円筒状の回転ハウジングと、
前記回転ハウジングの開口端の内周に嵌装され、前記開口端を閉塞する開口端カバーと、
前記回転ハウジングの内周と前記開口端カバーの外周との間を封止するシール部材と、
前記シール部材よりも前記開口端側に設けられ、前記回転ハウジングの内周と前記開口端カバーの外周との間で、外部から侵入した異物を堰き止める堰止部材と、
を備える変速機。 - 請求項1に記載の変速機であって、
前記堰止部材は、前記回転ハウジングと前記開口端カバーとに当接した状態で設けられる、
変速機。 - 請求項2に記載の変速機であって、
前記堰止部材は、前記回転ハウジングと前記開口端カバーとが軸方向に相対変位した場合に、軸方向に摺動するように設けられる、
変速機。 - 請求項1から3のいずれかに記載の変速機であって、
前記堰止部材は、角リングである、
変速機。 - 請求項1から3のいずれかに記載の変速機と、前記駆動源と、を備える駆動装置。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020187021497A KR20180095088A (ko) | 2016-02-12 | 2017-01-26 | 변속기 및 변속기를 구비한 구동 장치 |
CN201780008273.2A CN108603586A (zh) | 2016-02-12 | 2017-01-26 | 变速器和具备变速器的驱动装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016-024800 | 2016-02-12 | ||
JP2016024800A JP6643131B2 (ja) | 2016-02-12 | 2016-02-12 | 変速機及び変速機を備えた駆動装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017138365A1 true WO2017138365A1 (ja) | 2017-08-17 |
Family
ID=59563197
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2017/002781 WO2017138365A1 (ja) | 2016-02-12 | 2017-01-26 | 変速機及び変速機を備えた駆動装置 |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP6643131B2 (ja) |
KR (1) | KR20180095088A (ja) |
CN (1) | CN108603586A (ja) |
WO (1) | WO2017138365A1 (ja) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0712654U (ja) * | 1993-08-06 | 1995-03-03 | マブチモーター株式会社 | 減速機付小型モータ |
JPH07260000A (ja) * | 1994-03-18 | 1995-10-13 | Mitsubishi Cable Ind Ltd | 密封構造体 |
JP2000170656A (ja) * | 1998-12-03 | 2000-06-20 | Toyota Autom Loom Works Ltd | 圧縮機のシール構造及び圧縮機 |
JP2005133951A (ja) * | 1995-02-08 | 2005-05-26 | Denso Corp | 配管用締結部材およびそれを用いた配管用継手装置 |
JP2006300082A (ja) * | 2005-04-15 | 2006-11-02 | Nitto Kohki Co Ltd | 雌雄部材組立体 |
JP2014190444A (ja) * | 2013-03-27 | 2014-10-06 | Kayaba Ind Co Ltd | 変速機 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3159429B2 (ja) * | 1996-11-28 | 2001-04-23 | 本田技研工業株式会社 | 動力伝達機器の油漏れ防止構造 |
JP5117881B2 (ja) * | 2007-10-17 | 2013-01-16 | Gknドライブラインジャパン株式会社 | 動力伝達装置 |
CN102537292A (zh) * | 2012-02-27 | 2012-07-04 | 中国重汽集团济南动力有限公司 | 一种变速箱副箱输出轴油封结构 |
CN202833992U (zh) * | 2012-08-16 | 2013-03-27 | 中国重汽集团济南动力有限公司 | 一种变速器用油封结构 |
DE102013208290A1 (de) * | 2013-05-06 | 2014-11-06 | Zf Friedrichshafen Ag | Getriebegehäuse |
CN203670712U (zh) * | 2013-12-26 | 2014-06-25 | 杭州萧山江南通用机械厂 | 水下泵用齿轮箱的密封装置 |
-
2016
- 2016-02-12 JP JP2016024800A patent/JP6643131B2/ja active Active
-
2017
- 2017-01-26 CN CN201780008273.2A patent/CN108603586A/zh active Pending
- 2017-01-26 WO PCT/JP2017/002781 patent/WO2017138365A1/ja active Application Filing
- 2017-01-26 KR KR1020187021497A patent/KR20180095088A/ko not_active Application Discontinuation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0712654U (ja) * | 1993-08-06 | 1995-03-03 | マブチモーター株式会社 | 減速機付小型モータ |
JPH07260000A (ja) * | 1994-03-18 | 1995-10-13 | Mitsubishi Cable Ind Ltd | 密封構造体 |
JP2005133951A (ja) * | 1995-02-08 | 2005-05-26 | Denso Corp | 配管用締結部材およびそれを用いた配管用継手装置 |
JP2000170656A (ja) * | 1998-12-03 | 2000-06-20 | Toyota Autom Loom Works Ltd | 圧縮機のシール構造及び圧縮機 |
JP2006300082A (ja) * | 2005-04-15 | 2006-11-02 | Nitto Kohki Co Ltd | 雌雄部材組立体 |
JP2014190444A (ja) * | 2013-03-27 | 2014-10-06 | Kayaba Ind Co Ltd | 変速機 |
Also Published As
Publication number | Publication date |
---|---|
JP2017141935A (ja) | 2017-08-17 |
JP6643131B2 (ja) | 2020-02-12 |
KR20180095088A (ko) | 2018-08-24 |
CN108603586A (zh) | 2018-09-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5116805B2 (ja) | ギヤの潤滑構造 | |
CN105408665A (zh) | 减速装置 | |
CN109690153B (zh) | 工程机械的行驶装置 | |
WO2017138365A1 (ja) | 変速機及び変速機を備えた駆動装置 | |
JP6385904B2 (ja) | 装軌式車両 | |
WO2014178483A1 (ko) | 가변 용량형 기어 펌프 | |
CN102782362A (zh) | 齿轮装置 | |
KR20150097320A (ko) | 굴삭기용 주행감속기 | |
JP6799377B2 (ja) | 変速機及び変速機を備えた駆動装置 | |
KR102211034B1 (ko) | 메카니컬 시일 장치 | |
JP2013210071A (ja) | 無限軌道駆動装置のシール構造 | |
JP2017150508A (ja) | 変速機及び変速機を備える駆動装置 | |
JP2017215002A (ja) | 走行用減速機およびそのハウジング | |
JP6706064B2 (ja) | 変速機及び変速機を備えた駆動装置 | |
JP6285902B2 (ja) | 建設機械の回転装置 | |
WO2018079410A1 (ja) | 変速機及び変速機を備えた駆動装置 | |
JP2017150509A (ja) | 変速機及び変速機を備えた駆動装置 | |
KR20180045460A (ko) | 기어 변속장치 | |
KR101295999B1 (ko) | 감속기의 물 유입 방지 구조 | |
JP2001248735A (ja) | フローティングシール及び該フローティングシールを備えた減速装置 | |
JP2017180511A (ja) | 変速機及び変速機を備えた駆動装置 | |
JP6057467B2 (ja) | 変速機 | |
JP2022055958A (ja) | 建設機械の走行装置 | |
JP2020159463A (ja) | 動力伝達装置 | |
JP6857082B2 (ja) | メカニカルシール装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 17750090 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 20187021497 Country of ref document: KR Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020187021497 Country of ref document: KR |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 17750090 Country of ref document: EP Kind code of ref document: A1 |