CN106081089A - The wheelbase of a kind of multi-rotor aerocraft adjusts structure and control method - Google Patents
The wheelbase of a kind of multi-rotor aerocraft adjusts structure and control method Download PDFInfo
- Publication number
- CN106081089A CN106081089A CN201610670799.4A CN201610670799A CN106081089A CN 106081089 A CN106081089 A CN 106081089A CN 201610670799 A CN201610670799 A CN 201610670799A CN 106081089 A CN106081089 A CN 106081089A
- Authority
- CN
- China
- Prior art keywords
- ball
- ball screw
- support
- spline
- shaft
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C27/00—Rotorcraft; Rotors peculiar thereto
- B64C27/04—Helicopters
- B64C27/08—Helicopters with two or more rotors
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transmission Devices (AREA)
- Prostheses (AREA)
Abstract
The wheelbase that the invention discloses a kind of multi-rotor aerocraft adjusts structure, including support, ball spline shaft and ball screw, the top and bottom of described support are all run through and are provided with installing hole, spline axle bed it is connected in the installing hole of described pedestal upper end, thread ring it is connected to, S1: use active force driving means and auxiliary power drive device to drive ball screw and ball spline shaft to rotate respectively in the installing hole of pedestal lower end；S2: under the threaded engagement effect of driving lever and support, can make ball screw and ball spline shaft synchronize to realize stretching motion；S3: when rotating forward ball screw, ball screw is near the motion of the direction of support, threaded block and follower lever are by internal and external threads cooperating, threaded block moves near the direction of support on ball screw, the present invention makes the overall weight of movable part alleviate, and it is fast to regulate the speed, and inertia is little, provides great convenience for user.
Description
Technical field
The present invention relates to vehicle technology field, the wheelbase of a kind of multi-rotor aerocraft adjusts structure and controlling party
Method.
Background technology
Conventional electric multi-rotor aerocraft, it is not necessary to adjust wheelbase, because the motor of every shaft end is all independent driving,
The attitude of change of flight device can be carried out by electricity key turn over speed.The many rotors of conventional electric are each the independent speed governing of spindle motor, according to
Lever principle changes moment by change power, and the means of regulation attitude are single, are out of question for motorized motions, but if
It is this but react the single power dispersion output that slow power source (such as electromotor etc.) forms to use other high-powers
The multi-rotor aerocraft of new structure, just cannot meet the needs adjusting attitude.
The motor that drives of conventional electric multi-rotor aerocraft must simultaneously meet active force driving and the needs of pose adjustment,
Power utilization efficiency is low, it is impossible to always work in optimum state.
Under prior art, this innovative multi-rotor aerocraft pose adjustment do not had good solution, not only very
The functional of aircraft is defined in big degree, and the biggest use obstacle of cause the user, limit whole many rotors
The fast development of aircraft industry.
Summary of the invention
The wheelbase that it is an object of the invention to provide a kind of multi-rotor aerocraft adjusts structure and control method, on solving
State the problem proposed in background technology.
For achieving the above object, the present invention provides following technical scheme: the wheelbase of a kind of multi-rotor aerocraft adjusts structure,
Including support, ball spline shaft and ball screw, the top and bottom of described support are all run through and are provided with installing hole, on described support
End installing hole in be connected to spline axle bed, in the installing hole of pedestal lower end in be connected to thread ring, described ball spline shaft
One end is plugged in spline axle bed, and described ball screw includes driving lever, follower lever and the first connector, and described driving lever sets
Having plus thread, follower lever to be provided with left-hand thread, one end of driving lever is plugged in thread ring, and the other end of driving lever passes through
First connector connects follower lever, and support, one end of described driving lever are all run through in one end of described driving lever and ball spline shaft
Connecting and have auxiliary power drive device, one end of ball spline shaft connects active force driving means；
Described ball spline shaft and ball screw are provided with fixed plate in the one end away from support, the top and bottom of fixed plate
It is equipped with mounting groove, and ball spline shaft and ball screw are movably arranged in mounting groove respectively；
The inner sleeve of described ball spline shaft is connected to fixing seat and spline housing, is connected in fixing seat, follower lever in spline housing
On be socketed with threaded block, and the junction of follower lever and threaded block is provided with ball nut, and fixing seat is socketed with fixing bearing, and
The upper end of threaded block connects the lower end of fixing bearing by the second connector；
The upper end of described spline housing connects one end of L-type connecting plate, and the other end of L-type connecting plate is provided with shaft seat, turns
Running through in axle bed and be provided with rotating shaft, and the upper end of rotating shaft is coaxially connected with propeller, the lower end of rotating shaft connects the second conical tooth, institute
Stating spline housing and be connected to the first conical tooth fixing near one end of the second conical tooth, described first conical tooth is by gear engagement even
Connect the second conical tooth.
Preferably, the junction of described ball spline shaft and ball screw and mounting groove is provided with clutch shaft bearing, described screw thread
The collar is provided with the second bearing with the junction of installing hole, and described rotating shaft is provided with the 3rd bearing, described flower with the junction of shaft seat
Key set and the junction fixing seat are provided with the 4th bearing, and described fixing seat is provided with the 5th bearing with the junction of ball spline shaft.
Preferably, described threaded block is in the one end away from the first conical tooth by location-plate connection fixing base, and fixed plate is
Integrated formed structure or multiple accessory and screw are fixed and are formed.
The wheelbase control method of a kind of multi-rotor aerocraft, comprises the following steps:
S1: use active force driving means and auxiliary power drive device to drive ball screw and ball spline shaft to turn respectively
Dynamic；
S2: under the threaded engagement effect of driving lever and support, can make ball screw and ball spline shaft synchronize to realize
Stretching motion；
S3: when rotating forward ball screw, the driving lever of ball screw acts on jointly with thread ring, ball screw to
Near the motion of the direction of support, threaded block and follower lever by internal and external threads cooperating, threaded block on ball screw to leaning on
The direction motion of nearly support；
S4: when rotating backward ball screw, ball screw moves to the direction away from support, and threaded block and follower lever lead to
Crossing internal and external threads cooperating, threaded block moves to the direction away from support on ball screw；
S5: threaded block drives fixing seat and spline housing to move at ball spline shaft, and the axial spline housing of ball spline provides to be turned round
Square, the first conical tooth rotates；
S6: by gear engagement, the first conical tooth can make the second conical tooth rotate, the second conical tooth and then drive
Rotating shaft and propeller rotational.
Compared with prior art, the invention has the beneficial effects as follows: by ball screw driving lever and support disposed thread seat
Interaction, make screw screw mandrel drive together with ball spline shaft and overall realize translation, meanwhile, by ball screw from
Lever and threaded block interact, and overall the realization on screw screw mandrel and ball spline shaft of structure synchronizes to translate in the same direction, and the two is altogether
Same-action, and then realize changing the purpose of wheelbase, and constitute ball spline pair by the ball spline shaft arranged and spline housing
Propeller for aircraft provides power, and economical and practical, ruggedness is strong, and the present invention is added up to by rational structure, it is possible to easily
Change wheelbase easily, it is achieved the center of aircraft and the relative changes of propeller position, by changing each spiral shell the most in real time
The wheelbase of rotation oar, can dynamically adjust the attitude of aircraft in flight course, add the attitude regulation means of aircraft, very
Improve the overall function of aircraft in big degree, provide more choices sky for developing various novel multi-rotor aerocrafts
Between, it is particularly suitable for the dispersion output of various single power, and many rotors in outfit high-power low-response speed power source, meets it
The needs of pose adjustment.The present invention makes the overall weight of movable part alleviate, and it is fast to regulate the speed, and inertia is little, for using
Person provides great convenience.
Accompanying drawing explanation
Fig. 1 is present configuration schematic diagram；
Fig. 2 is the bracket side view of the present invention；
Fig. 3 is the fixed plate side view of the present invention.
In figure: 1 support, 2 ball spline shafts, 3 ball screws, 31 driving levers, 32 follower levers, 4 first connectors, 41 second
Connector, 5 spline housings, 51 L-type connecting plates, 6 threaded blocks, 61 location-plates, 7 shaft seats, 71 propellers, 8 first conical tooths, 81
Second conical tooth, 9 fixed plates.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
Referring to Fig. 1-3, the present invention provides a kind of technical scheme: the wheelbase of a kind of multi-rotor aerocraft adjusts structure, bag
Including support 1, ball spline shaft 2 and ball screw 3, the top and bottom of described support 1 are all run through and are provided with installing hole, described support
Be connected to spline axle bed in the installing hole of 1 upper end, in the installing hole of support 1 lower end in be connected to thread ring, described ball spline
One end of axle 2 is plugged in spline axle bed, and described ball screw 3 includes driving lever 31, follower lever 32 and the first connector 4, institute
Stating driving lever 31 and be provided with plus thread, follower lever 32 is provided with left-hand thread, and one end of driving lever 31 is plugged in thread ring, and
The other end of driving lever 31 connects follower lever 32 by the first connector 4, and one end of described driving lever 31 and ball spline shaft 2 is equal
Running through support 1, one end of described driving lever 31 connects auxiliary power drive device, and one end of ball spline shaft 2 connects master
Power Drive Unit.
Described ball spline shaft 2 and ball screw 3 are provided with fixed plate 9, the upper end of fixed plate 9 in the one end away from support 1
Being equipped with mounting groove with lower end, and ball spline shaft 2 and ball screw 3 are movably arranged in mounting groove respectively, fixed plate 9 is one
Forming structure or multiple accessory and screw are fixed and are formed.
The inner sleeve of described ball spline shaft 2 is connected to fixing seat and spline housing 5, is connected in fixing seat in spline housing 5, driven
It is socketed with threaded block 6 on bar 32, and the junction of follower lever 32 and threaded block 6 is provided with ball nut, fixing seat is socketed with solid
Dead axle holds, and the upper end of threaded block 6 connects the lower end of fixing bearing by the second connector 41.
The upper end of described spline housing 5 connects one end of L-type connecting plate 51, and the other end of L-type connecting plate 51 is provided with rotating shaft
Seat 7, runs through in shaft seat 7 and is provided with rotating shaft, and the upper end of rotating shaft is coaxially connected with propeller 71, and the lower end of rotating shaft connects second
Conical tooth 81, described spline housing 5 is connected to the first conical tooth 8, described first taper fixing near one end of the second conical tooth 81
Tooth 8 connects the second conical tooth 81 by gear engagement.The first conical tooth 8 and the second conical tooth 81 connected by gear engagement,
Realizing the transmission of moment of torsion and power, make propeller 71 work rotate, it is fixed that spline housing 5 passes through in the one end away from the first conical tooth 8
Position plate 61 connects threaded block 6, and location-plate 61 is socketed on ball spline shaft 2 and ball screw 3.
The junction of described ball spline shaft 2 and ball screw 3 and mounting groove is provided with clutch shaft bearing, described thread ring with
The junction of installing hole is provided with the second bearing, and described rotating shaft is provided with the 3rd bearing, described spline housing 5 with the junction of shaft seat 7
Being provided with the 4th bearing with the junction of fixing seat, described fixing seat is provided with the 5th bearing with the junction of ball spline shaft 2, described
Threaded block 6 in the one end away from the first conical tooth 8 by location-plate 61 connection fixing base, fixed plate 9 be integrated formed structure or
It is that multiple accessory and screw are fixing to form.
The wheelbase control method of a kind of multi-rotor aerocraft, comprises the following steps:
S1: use active force driving means and auxiliary power drive device to drive ball screw 3 and ball spline shaft 2 respectively
Rotate；
S2: under the threaded engagement effect of driving lever 31 and support 1, can make ball screw 3 and ball spline shaft 2 synchronize
Realize stretching motion；
S3: when rotating forward ball screw 3, the driving lever 31 of ball screw 3 acts on jointly with thread ring, ball wire
Bar 3 passes through internal and external threads cooperating near the motion of the direction of support 1, threaded block 6 and follower lever 32, and threaded block 6 is at ball
To near the motion of the direction of support 1 on screw mandrel 3；
S4: when rotating backward ball screw 3, ball screw 3 moves to the direction away from support 1, threaded block 6 and driven
Bar 32 is by internal and external threads cooperating, and threaded block 6 moves to the direction away from support 1 on ball screw 3；
S5: threaded block 6 drives fixing seat and spline housing 5 to move at ball spline shaft 2, and ball spline shaft 2 carries to spline housing 5
For moment of torsion, the first conical tooth 8 rotates；
S6: by gear engagement, the first conical tooth 8 can make the second conical tooth 81 rotate, and the second conical tooth 81 enters
And drive rotating shaft and propeller 71 to rotate.
The present invention is added up to by rational structure, it is possible to easy and convenient change wheelbase, it is achieved the center of aircraft and spiral shell
The relative changes of rotation oar 71 position, by changing the wheelbase of each propeller 71 the most in real time, can in flight course dynamically
Adjust the attitude of aircraft, add the attitude regulation means of aircraft, greatly enhance the allomeric function of aircraft
Property, provide more choices space for developing various novel multi-rotor aerocrafts, be particularly suitable for the dispersion of various single power
Output, and it is equipped with many rotors in high-power low-response speed power source, meet the needs of its pose adjustment.The present invention makes may move
The overall weight of parts alleviates, and it is fast to regulate the speed, and inertia is little, provides great convenience for user.
Present configuration is reasonable in design, during the use of aircraft, ball screw 3 while flexible, threaded block 6
Can move at ball screw 3, make the distance at threaded block 6 and spline housing 5 and aircraft center regulate the speed quickening, to attitude
Response time shortens, and greatly enhances the overall function of aircraft, convenient for users to use.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, permissible
Understand and these embodiments can be carried out multiple change without departing from the principles and spirit of the present invention, revise, replace
And modification, the scope of the present invention be defined by the appended.
Claims (4)
1. the wheelbase of multi-rotor aerocraft adjusts a structure, including support (1), ball spline shaft (2) and ball screw (3),
The top and bottom of described support (1) are all run through and are provided with installing hole, it is characterised in that: in the installing hole of described support (1) upper end
Inside be connected to spline axle bed, in the installing hole of support (1) lower end in be connected to thread ring, one end of described ball spline shaft (2) insert
Being connected in spline axle bed, described ball screw (3) includes driving lever (31), follower lever (32) and the first connector (4), described master
Lever (31) is provided with plus thread, and follower lever (32) is provided with left-hand thread, and one end of driving lever (31) is plugged in thread ring,
And the other end of driving lever (31) connects follower lever (32), described driving lever (31) and ball spline by the first connector (4)
Support (1) is all run through in one end of axle (2), and one end of described driving lever (31) connects auxiliary power drive device, ball spline
One end of axle (2) connects active force driving means；
Described ball spline shaft (2) and ball screw (3) are provided with fixed plate (9), fixed plate (9) in the one end away from support (1)
Top and bottom be equipped with mounting groove, and ball spline shaft (2) and ball screw (3) are movably arranged in mounting groove respectively；
The inner sleeve of described ball spline shaft (2) is connected to fixing seat and spline housing (5), is connected in fixing seat in spline housing (5), from
It is socketed with threaded block (6) in lever (32), and the junction of follower lever (32) and threaded block (6) is provided with ball nut, fixing seat
On be socketed with fixing bearing, and the upper end of threaded block (6) connects the lower end of fixing bearing by the second connector (41)；
The upper end of described spline housing (5) connects one end of L-type connecting plate (51), and the other end of L-type connecting plate (51) is provided with and turns
Axle bed (7), runs through in shaft seat (7) and is provided with rotating shaft, and the upper end of rotating shaft is coaxially connected with propeller (71), and the lower end of rotating shaft is even
Being connected to the second conical tooth (81), described spline housing (5) is connected to the first conical tooth fixing near one end of the second conical tooth (81)
(8), described first conical tooth (8) connects the second conical tooth (81) by gear engagement.
The wheelbase of a kind of multi-rotor aerocraft the most according to claim 1 adjusts structure, it is characterised in that: described ball flower
The junction of key axle (2) and ball screw (3) and mounting groove is provided with the junction of clutch shaft bearing, described thread ring and installing hole
Being provided with the second bearing, described rotating shaft is provided with the 3rd bearing, described spline housing (5) and fixing seat with the junction of shaft seat (7)
Junction is provided with the 4th bearing, and described fixing seat is provided with the 5th bearing with the junction of ball spline shaft (2).
The wheelbase of a kind of multi-rotor aerocraft the most according to claim 1 adjusts structure, it is characterised in that: described threaded block
(6) in the one end away from the first conical tooth (8) by location-plate (61) connection fixing base, fixed plate (9) is integrated formed structure
Or multiple accessory and screw are fixing to be formed.
4. the wheelbase control method of the multi-rotor aerocraft described in a claim 1, it is characterised in that: comprise the following steps:
S1: use active force driving means and auxiliary power drive device to drive ball screw (3) and ball spline shaft (2) respectively
Rotate；
S2: under the threaded engagement effect of driving lever (31) and support (1), can make ball screw (3) and ball spline shaft (2)
Synchronization realizes stretching motion；
S3: when rotating forward ball screw (3), the driving lever (31) of ball screw (3) acts on jointly with thread ring, ball
Screw mandrel (3) passes through internal and external threads cooperating, screw thread near the motion of the direction of support (1), threaded block (6) and follower lever (32)
Seat (6) moves near the direction of support (1) on ball screw (3)；
S4: when rotating backward ball screw (3), ball screw (3) to away from support (1) direction move, threaded block (6) and
Follower lever (32) passes through internal and external threads cooperating, and threaded block (6) is transported to the direction away from support (1) on ball screw (3)
Dynamic；
S5: threaded block (6) drives fixing seat and spline housing (5) to move at ball spline shaft (2), and ball spline shaft (2) is to spline
Set (5) provides moment of torsion, and the first conical tooth (8) rotates；
S6: by gear engagement, the first conical tooth (8) can make the second conical tooth (81) rotate, the second conical tooth (81)
And then drive rotating shaft and propeller (71) to rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610670799.4A CN106081089B (en) | 2016-08-16 | 2016-08-16 | The wheelbase adjustment structure and control method of a kind of multi-rotor aerocraft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610670799.4A CN106081089B (en) | 2016-08-16 | 2016-08-16 | The wheelbase adjustment structure and control method of a kind of multi-rotor aerocraft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106081089A true CN106081089A (en) | 2016-11-09 |
| CN106081089B CN106081089B (en) | 2018-06-29 |
Family
ID=58069317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610670799.4A Expired - Fee Related CN106081089B (en) | 2016-08-16 | 2016-08-16 | The wheelbase adjustment structure and control method of a kind of multi-rotor aerocraft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106081089B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106927042A (en) * | 2017-03-29 | 2017-07-07 | 深圳市雷凌广通技术研发有限公司 | A kind of unmanned plane of changeable form |
| CN107132848A (en) * | 2017-03-15 | 2017-09-05 | 南宁学院 | A kind of many rotor short distance logistics unmanned plane propeller attitude adjusting methods |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201988182U (en) * | 2011-01-11 | 2011-09-28 | 田瑜 | Screw steering engine for model planes |
| CN104787327A (en) * | 2015-05-12 | 2015-07-22 | 无锡职业技术学院 | Axle distance-variable multi-rotor aircraft |
| KR101565979B1 (en) * | 2015-04-13 | 2015-11-13 | 한국항공우주연구원 | Unmanned aerial vehicle |
| CN205076041U (en) * | 2015-09-25 | 2016-03-09 | 黄少锋 | Strong adaptability's aircraft |
| CN205952306U (en) * | 2016-08-16 | 2017-02-15 | 莆田市双普信息科技有限公司 | Wheel base of many rotor crafts is adjusted structure |
-
2016
- 2016-08-16 CN CN201610670799.4A patent/CN106081089B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201988182U (en) * | 2011-01-11 | 2011-09-28 | 田瑜 | Screw steering engine for model planes |
| KR101565979B1 (en) * | 2015-04-13 | 2015-11-13 | 한국항공우주연구원 | Unmanned aerial vehicle |
| CN104787327A (en) * | 2015-05-12 | 2015-07-22 | 无锡职业技术学院 | Axle distance-variable multi-rotor aircraft |
| CN205076041U (en) * | 2015-09-25 | 2016-03-09 | 黄少锋 | Strong adaptability's aircraft |
| CN205952306U (en) * | 2016-08-16 | 2017-02-15 | 莆田市双普信息科技有限公司 | Wheel base of many rotor crafts is adjusted structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107132848A (en) * | 2017-03-15 | 2017-09-05 | 南宁学院 | A kind of many rotor short distance logistics unmanned plane propeller attitude adjusting methods |
| CN106927042A (en) * | 2017-03-29 | 2017-07-07 | 深圳市雷凌广通技术研发有限公司 | A kind of unmanned plane of changeable form |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106081089B (en) | 2018-06-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2062627B1 (en) | A model helicopter | |
| CN104787327B (en) | A kind of multi-rotor aerocraft of changeable wheelbase | |
| CN204674826U (en) | A kind of multi-rotor aerocraft | |
| CN106081089A (en) | The wheelbase of a kind of multi-rotor aerocraft adjusts structure and control method | |
| CN206502014U (en) | A kind of single duct engine | |
| CN213457543U (en) | Interpupillary distance adjustment mechanism and intelligent glasses | |
| CN109217574A (en) | A kind of electromechanical servo system | |
| CN101177167A (en) | Power-driven system of aircraft | |
| CN205952306U (en) | Wheel base of many rotor crafts is adjusted structure | |
| CN101633130B (en) | Direct-drive type feeding device of milling machine | |
| CN209241334U (en) | A kind of extended-range energy transfer mechanism for light-weight electric aircraft | |
| CN206417178U (en) | A kind of horn of auto heterodyne unmanned plane | |
| CN201537986U (en) | Vertical double-power cutting type groove cutting machine | |
| CN201590715U (en) | Deceleration variable-speed drive device | |
| CN205652283U (en) | Electric motorcycle car inner rotor motor friction disc formula self -adaptation autosegregation drives assembly | |
| CN208874436U (en) | A kind of electromechanical servo system | |
| CN205013210U (en) | A rotor system for mixing kinetic energy power generation facility | |
| CN211810308U (en) | High-precision electromagnetic clutch type variable inertia reaction flywheel | |
| CN106741930A (en) | A kind of double differectial active speed regulating structure of multi-rotor aerocraft | |
| CN209533405U (en) | A kind of intelligent robot transmission mechanism of flexibility and reliability | |
| CN101748569A (en) | Novel integrated structure of servo driving system of industrial sewing machine | |
| CN109353526A (en) | A kind of extended-range energy transfer mechanism for light-weight electric aircraft | |
| CN205618642U (en) | Electric motor car is with automatic energy -conserving drive assembly of square that increases of split type self -adaptation | |
| CN205736916U (en) | Mover drive assembly | |
| CN205618565U (en) | Multi -sheet clutch assembly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180629 Termination date: 20210816 |