CN113027933A - Direct connection structure - Google Patents

Direct connection structure Download PDF

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Publication number
CN113027933A
CN113027933A CN202110167927.4A CN202110167927A CN113027933A CN 113027933 A CN113027933 A CN 113027933A CN 202110167927 A CN202110167927 A CN 202110167927A CN 113027933 A CN113027933 A CN 113027933A
Authority
CN
China
Prior art keywords
gear box
direct connection
input shaft
box structure
connection structure
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.)
Pending
Application number
CN202110167927.4A
Other languages
Chinese (zh)
Inventor
黄之杰
王淑玲
李健
朱峰
郭大聪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Air Force Service College of PLA
Original Assignee
Air Force Service College of PLA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Air Force Service College of PLA filed Critical Air Force Service College of PLA
Priority to CN202110167927.4A priority Critical patent/CN113027933A/en
Publication of CN113027933A publication Critical patent/CN113027933A/en
Pending legal-status Critical Current

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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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H5/00—Removing snow or ice from roads or like surfaces; Grading or roughening snow or ice
    • E01H5/04—Apparatus propelled by animal or engine power; Apparatus propelled by hand with driven dislodging or conveying levelling elements, conveying pneumatically for the dislodged material
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D13/00—Friction clutches
    • F16D13/22—Friction clutches with axially-movable clutching members
    • F16D13/38—Friction clutches with axially-movable clutching members with flat clutching surfaces, e.g. discs
    • F16D13/52—Clutches with multiple lamellae ; Clutches in which three or more axially moveable members are fixed alternately to the shafts to be coupled and are pressed from one side towards an axially-located member
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D13/00—Friction clutches
    • F16D13/58—Details
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D13/00—Friction clutches
    • F16D13/58—Details
    • F16D13/70—Pressure members, e.g. pressure plates, for clutch-plates or lamellae; Guiding arrangements for pressure members
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/30—Flywheels
    • F16F15/315—Flywheels characterised by their supporting arrangement, e.g. mountings, cages, securing inertia member to shaft
    • 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
    • F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
    • 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
    • F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
    • 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
    • F16H2057/02034—Gearboxes combined or connected with electric machines

Abstract

The invention discloses a direct connection structure, which comprises an engine assembly and a gear box structure, wherein a flywheel of the engine assembly is fixedly locked and connected with a coupling of the gear box structure through a bolt and a nut, one end of the engine assembly is in threaded connection with one end of the gear box structure through a connection structure, one end of the coupling of the gear box structure is fixedly connected with a first input shaft through a flat key, one end of the first input shaft is movably connected with the first input shaft through a friction clutch, and a driving gear is fixedly arranged on the surface of the input shaft through a spline. The whole weight is reduced, the power consumption is saved, the number of connected parts is reduced, and the fault rate is low.

Description

Direct connection structure
Technical Field
The invention relates to a direct connection structure, in particular to a direct connection structure, and belongs to the technical field.
Background
Mechanical snow sweeping is a good way to liberate people from physical snow sweeping work, so scientific designers are always exploring how to develop safer, more reliable and more practical snow sweeping machines, snow sweeping vehicles are the products of the development of the snow sweeping machines, and the snow sweeping vehicles have been developed abroad for decades and have advanced technology. The first snow sweeper adopts a bulldozer or a loader to sweep snow, and nowadays, with the rapid development of the technology of the snow sweeper, the types of snow sweepers which are widely distributed in the market mainly include a scraping type snow sweeper series, a throwing type snow sweeper series, a brushing type snow sweeper series, a shock type ice breaking snow sweeper series and the like, but the principle of the snow sweeper is still to drive a snow sweeper to realize the task of clearing accumulated snow by a large-sized vehicle. The snow sweeper has stable performance and high manufacturing cost, and is not suitable for sweeping the accumulated snow on the road surface in narrow paths, factories, schools, units or residential districts.
Due to the connection characteristic between the snow sweeper structures, the whole structure of the whole snow sweeper is long, the whole weight is increased, the power consumption of the snow sweeper is increased, and meanwhile, the number of connected parts is increased to cause high failure rate, so that a direct connection structure is provided.
Disclosure of Invention
The present invention is directed to a direct connection structure to solve the above problems.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a directly link structure, includes engine assembly and gear box structure, the flywheel department of engine assembly is through the fixed lock of the shaft coupling of bolt-nut with the gear box structure and is dead to be connected, the one end threaded connection of connection structure and gear box structure is passed through to engine assembly's one end, the first input shaft of parallel key fixedly connected with is passed through to the one end of gear box structure shaft coupling, the one end of first input shaft has first input shaft through friction clutch swing joint, there is the driving gear on the surface of input shaft through spline fixed mounting, the surface engagement of driving gear is connected with driven gear, driven gear's middle part has the output shaft through spline fixed mounting, fan wheel is installed through lock nut in the awl axle department of output shaft.
As a preferable technical scheme of the invention, the connecting structure comprises a first connecting flange arranged at one end of the engine assembly, a second connecting flange is connected to an installation hole position of the first connecting flange through a connecting bolt in a threaded manner, and the second connecting flange is fixedly arranged at one end of the gear box structure.
As a preferred technical scheme of the invention, the outer surface of the fan impeller is provided with a fan outer cover, and the middle part of one side of the fan outer cover is provided with an air outlet channel connecting port.
As a preferred technical scheme of the invention, a shaft mounting seat is fixedly arranged in the gear box structure, and the shaft mounting seat is movably connected with the input shaft.
As a preferable technical scheme of the invention, both fulcrums of the output shaft are connected with a bearing in the gear box structure in an installing mode.
As a preferable technical scheme of the invention, the assembly mode and the assembly precision of the output shaft and the fan impeller are respectively interference fit and 0.1 mm.
As a preferred technical solution of the present invention, the friction clutch is a wet friction clutch, and the friction clutch is electrically connected to an external power supply through an electromagnetic control unit.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the direct connection structure, the engine assembly, the gear box structure and the fan impeller are directly connected, the wet friction clutch is integrated in the gear box structure, the fan impeller is directly installed at the output shaft through the function of electromagnetically controlling the wet friction clutch, the length of the whole structure is shortened through the connection mode, the whole weight is reduced, the power consumption is saved, fewer connecting parts are needed, the fault rate is reduced, the power consumption is far lower than that of a product in the connection mode when the snow sweeper works due to the connection structure and the high-efficiency centrifugal fan, and the practicability is high.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a partially enlarged schematic view of fig. 1 according to the present invention.
In the figure: 1. an engine assembly; 2. a gearbox arrangement; 3. a fan housing; 4. a first connecting flange; 5. a connecting bolt; 6. a second connecting flange; 7. a first input shaft; 8. a driving gear; 9. a friction clutch; 10. a driven gear; 11. an output shaft; 12. a shaft mount; 13. a fan impeller; 14. an air outlet channel connecting port; 15. locking the nut; 16. a first input shaft.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution of a direct connection structure:
according to the figure 1-2, including engine assembly 1 and gear box structure 2, the flywheel department of engine assembly 1 is through the fixed lock dead joint of bolt and nut and gear box structure 2's shaft coupling, the one end of engine assembly 1 is through the one end threaded connection of connection structure and gear box structure 2, the one end of gear box structure 2 shaft coupling is through flat key fixedly connected with first input shaft 16, the one end of first input shaft 16 has first input shaft 7 through friction clutch 9 swing joint, there is driving gear 8 on the surface of input shaft 7 through spline fixed mounting, the surface meshing of driving gear 8 is connected with driven gear 10, there is output shaft 11 at the middle part of driven gear 10 through spline fixed mounting, fan wheel 13 is installed through lock nut 15 in the awl axle department of output shaft 11.
According to the figures 1 and 2, the connecting structure comprises a first connecting flange 4 arranged at one end of the engine component 1, a second connecting flange 6 is connected at the mounting hole position of the first connecting flange 4 through a connecting bolt 5 in a threaded manner, the second connecting flange 6 is fixedly arranged at one end of the gear box structure 2, the connecting stability between the engine component 1 and the gear box structure 2 is improved, violent shaking is avoided in the using process, a fan outer cover 3 is arranged on the outer surface of a fan impeller 13, an air outlet channel connecting port 14 is arranged in the middle of one side of the fan outer cover 3, the connection is convenient to connect with a snow dust cleaning structure, a shaft mounting seat 12 is fixedly arranged inside the gear box structure 2, the shaft mounting seat 12 is movably connected with the input shaft 7, the transmission precision of the input shaft 7 is improved, two support points of the output shaft 11 are respectively connected with a bearing inside the gear box structure 2, and the transmission precision of the output, meanwhile, the bearing can bear larger axial force and radial force, the rapid rotation is convenient, the assembly mode and the assembly precision of the output shaft 11 and the fan impeller 13 are respectively interference fit and 0.1mm, the assembly stability is improved, the use is convenient, the friction clutch 9 is a wet friction clutch, the friction clutch 9 is electrically connected with an external power supply through an electromagnetic control unit, and the wet friction clutch has the advantages of small abrasion, good heat dissipation, low temperature rise, long service life, capability of transmitting larger torque and long service life.
When the direct connection structure is used, the engine assembly 1 is started, the flywheel of the engine assembly 1 drives the coupler of the gear box structure 2 and the first input shaft 16 of the gear box structure 2 to rotate, the friction clutch 9 is in a disengaged state in an idle state, the second input shaft 7, the driving gear 8, the driven gear 10, the output shaft 11 and the fan impeller 13 of the gear box structure 2 do not rotate, the torque rises after the rotating speed of the engine assembly 1 is increased, the combination button of the friction clutch 9 is pressed at the moment, friction sheets of the friction clutch 9 are gradually pressed, the friction clutch 9 completes combination action, the first input shaft 16 and the second input shaft 7 of the gear box structure start to synchronously rotate, the driving gear 8, the driven gear 10, the output shaft 11 and the fan impeller 13 are driven to rotate, the accelerator of the engine assembly 1 is continuously increased to increase the rotating speed to the working rotating speed, the system starts to operate normally; in the stopping process, the fan impeller 13 normally operates, the disengagement button of the friction clutch 9 is pressed, the friction plate of the friction clutch 9 is gradually disengaged, the fan has no power input at the moment, the rotating speed is slowly reduced due to the rotational inertia and the air resistance until the fan automatically stops after one minute, after the disengagement button of the friction clutch 9 is pressed, the rotating speed of the fan is observed to be reduced, namely the engine assembly 1 is closed after the friction clutch is disengaged, the engine assembly 1 can be immediately stopped, at the moment, the engine assembly 1 cannot be dragged backwards and damaged when the fan impeller 13 rotates because the friction clutch 9 is completely disengaged, in conclusion, the engine assembly 1, the gear box structure 2 and the fan impeller 3 are directly connected, and the wet friction clutch is integrated in the gear box structure 2, through the function of electromagnetic control wet friction clutch, fan wheel 13 direct mount has shortened overall structure's length at output shaft 11 department, adopts this kind of connection form for whole weight reduces, has saved the consumption, and few and then the reduction fault rate of connecting spare part is low, and the consumption when this kind of connection structure and efficient centrifugal fan guarantee the snowplow operation is less than the product of its connection form far away in addition.
In the description of the present invention, it is to be understood that the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings and are only for convenience in describing the present invention and simplifying the description, but are not intended to indicate or imply that the indicated devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.
In the present invention, unless otherwise explicitly specified or limited, for example, it may be fixedly attached, detachably attached, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. The direct connection structure comprises an engine assembly (1) and a gear box structure (2), and is characterized in that a flywheel of the engine assembly (1) is fixedly locked and connected with a coupler of the gear box structure (2) through a bolt and a nut, one end of the engine assembly (1) is in threaded connection with one end of the gear box structure (2) through a connecting structure, one end of the coupler of the gear box structure (2) is fixedly connected with a first input shaft (16) through a flat key, one end of the first input shaft (16) is movably connected with a first input shaft (7) through a friction clutch (9), a driving gear (8) is fixedly installed on the surface of the input shaft (7) through a spline, a driven gear (10) is connected with the surface of the driving gear (8) in a meshing manner, an output shaft (11) is fixedly installed in the middle of the driven gear (10) through a spline, and a fan impeller (13) is arranged at the conical shaft of the output shaft (11) through a locking nut (15).
2. A direct connection structure according to claim 1, characterized in that: the connecting structure comprises a first connecting flange (4) arranged at one end of the engine assembly (1), a second connecting flange (6) is connected to the mounting hole position of the first connecting flange (4) through a connecting bolt (5) in a threaded mode, and the second connecting flange (6) is fixedly arranged at one end of the gear box structure (2).
3. A direct connection structure according to claim 1, characterized in that: the outer surface of the fan impeller (13) is provided with a fan outer cover (3), and the middle part of one side of the fan outer cover (3) is provided with an air outlet channel connector (14).
4. A direct connection structure according to claim 1, characterized in that: the gearbox is characterized in that a shaft mounting seat (12) is fixedly arranged inside the gearbox structure (2), and the shaft mounting seat (12) is movably connected with the input shaft (7).
5. A direct connection structure according to claim 1, characterized in that: and two branch points of the output shaft (11) are respectively connected with a bearing in the gear box structure (2).
6. A direct connection structure according to claim 1, characterized in that: the assembly mode and the assembly precision of the output shaft (11) and the fan impeller (13) are respectively interference fit and 0.1 mm.
7. A direct connection structure according to claim 1, characterized in that: the friction clutch (9) is a wet friction clutch, and the friction clutch (9) is electrically connected with an external power supply through an electromagnetic control unit.
CN202110167927.4A 2021-02-05 2021-02-05 Direct connection structure Pending CN113027933A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110167927.4A CN113027933A (en) 2021-02-05 2021-02-05 Direct connection structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110167927.4A CN113027933A (en) 2021-02-05 2021-02-05 Direct connection structure

Publications (1)

Publication Number Publication Date
CN113027933A true CN113027933A (en) 2021-06-25

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ID=76460237

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110167927.4A Pending CN113027933A (en) 2021-02-05 2021-02-05 Direct connection structure

Country Status (1)

Country Link
CN (1) CN113027933A (en)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4783915A (en) * 1986-06-18 1988-11-15 Honda Giken Kogyo Kabushiki Kaisha Self-propelled snow removing machine
US20030089570A1 (en) * 2001-11-14 2003-05-15 Ochab David C. Bi-directional overrunning clutch for a primary drive axle
CN2556126Y (en) * 2002-05-20 2003-06-18 杭州发达齿轮箱有限公司 Improved marine gearbox (5)
CN103046507A (en) * 2012-12-26 2013-04-17 长沙中联重科环卫机械有限公司 Driving mechanism for equipment
CN203332381U (en) * 2013-05-02 2013-12-11 杭州前进齿轮箱集团股份有限公司 Light clutch speed-increasing gearbox
CN203670724U (en) * 2013-12-26 2014-06-25 杭州萧山江南通用机械厂 Power transmission gear box
CN205559762U (en) * 2016-05-04 2016-09-07 冯帮建 A reduction gear for straightening wing propeller
EP3088148A1 (en) * 2014-11-20 2016-11-02 Black & Decker Inc. Dual speed gearboxes, tranmissions and apparatuses incorporating the same
CN207598820U (en) * 2017-10-23 2018-07-10 湖南龙舟农机股份有限公司 A kind of chain stretching device and rotating rotary cultivator
CN109154335A (en) * 2016-03-30 2019-01-04 本田技研工业株式会社 Power transmission
CN208919280U (en) * 2018-10-31 2019-05-31 杭州伟豪离合器有限公司 One-in-and-one-out ship drive gear carrier

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4783915A (en) * 1986-06-18 1988-11-15 Honda Giken Kogyo Kabushiki Kaisha Self-propelled snow removing machine
US20030089570A1 (en) * 2001-11-14 2003-05-15 Ochab David C. Bi-directional overrunning clutch for a primary drive axle
CN2556126Y (en) * 2002-05-20 2003-06-18 杭州发达齿轮箱有限公司 Improved marine gearbox (5)
CN103046507A (en) * 2012-12-26 2013-04-17 长沙中联重科环卫机械有限公司 Driving mechanism for equipment
CN203332381U (en) * 2013-05-02 2013-12-11 杭州前进齿轮箱集团股份有限公司 Light clutch speed-increasing gearbox
CN203670724U (en) * 2013-12-26 2014-06-25 杭州萧山江南通用机械厂 Power transmission gear box
EP3088148A1 (en) * 2014-11-20 2016-11-02 Black & Decker Inc. Dual speed gearboxes, tranmissions and apparatuses incorporating the same
CN109154335A (en) * 2016-03-30 2019-01-04 本田技研工业株式会社 Power transmission
CN205559762U (en) * 2016-05-04 2016-09-07 冯帮建 A reduction gear for straightening wing propeller
CN207598820U (en) * 2017-10-23 2018-07-10 湖南龙舟农机股份有限公司 A kind of chain stretching device and rotating rotary cultivator
CN208919280U (en) * 2018-10-31 2019-05-31 杭州伟豪离合器有限公司 One-in-and-one-out ship drive gear carrier

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曾翰雅等: "船用齿轮箱机械封闭式试验台开发及应用", 《科技资讯》 *

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Application publication date: 20210625

RJ01 Rejection of invention patent application after publication