CN206231439U - A kind of miniature 4 wheel driven four-wheel steering greenhouse engine - Google Patents
A kind of miniature 4 wheel driven four-wheel steering greenhouse engine Download PDFInfo
- Publication number
- CN206231439U CN206231439U CN201621338803.9U CN201621338803U CN206231439U CN 206231439 U CN206231439 U CN 206231439U CN 201621338803 U CN201621338803 U CN 201621338803U CN 206231439 U CN206231439 U CN 206231439U
- Authority
- CN
- China
- Prior art keywords
- steering
- gear
- wheel
- tooth bar
- rocking bar
- 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.)
- Expired - Fee Related
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- Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
Abstract
The utility model discloses a kind of miniature 4 wheel driven four-wheel steering greenhouse engine,Solve existing engine radius of turn big,Baroque technical problem,Miniature 4 wheel driven four-wheel steering greenhouse engine of the present utility model,Including frame,Frame is provided with engine,Main-gear box,Walking mechanism and the steering for driving walking mechanism to turn to,Steering includes steering wheel,Steering spindle,Front steering gear,Preceding tooth bar,Power take-off gear,Front steering double rocker mechanism,Steering drive axle,Trailing wheel change gear group,Tooth bar and rear steering double rocker mechanism afterwards,Steering wheel is connected by steering spindle with front steering gear,Preceding tooth bar is connected by front steering double rocker mechanism with front component,Front steering gear is connected with preceding tooth bar external toothing respectively with power take-off gear,Trailing wheel change gear group is connected between steering drive axle engages with rear tooth bar,Tooth bar is connected by rear steering double rocker mechanism with wheel assembly afterwards,During steering,Preceding tooth bar is opposite with the moving direction of rear tooth bar.
Description
【Technical field】
The utility model is related to knob nonirrigated farmland greenhouse technical field of agricultural machinery, more particularly to a kind of miniature 4 wheel driven four
Rotate to greenhouse engine.
【Background technology】
Agricultural ploughing machine of the prior art uses front-wheel steer, when agricultural ploughing machine needs to turn in operation, operating personnel
The steering of front-wheel is controlled by control direction disk, so that the steering of whole fuselage is realized, however, the mode of front-wheel steer can increase
The radius of turn of big agricultural ploughing machine, for the less traditional warmhouse booth in space, due to the limitation of inner space, operating personnel
Agricultural ploughing machine whard to control is well on free steering inside greenhouse, and the operation to operating personnel is made troubles.
【Utility model content】
Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art and provide a kind of miniature 4 wheel driven
Four-wheel steering greenhouse engine, with radius of turn is small, simple structure the characteristics of.
Above-mentioned technical problem is solved, the utility model is adopted the following technical scheme that：
A kind of miniature 4 wheel driven four-wheel steering greenhouse engine, including frame, the frame are provided with engine, main transformer speed
Case, walking mechanism and the steering for driving the walking mechanism to turn to, the first output shaft of the engine is by connection
Axle device is connected with the wet clutch on main-gear box, and the main-gear box is connected to drive the walking with the walking mechanism
Mechanism walks, and the walking mechanism includes front component, preceding walking transmission mechanism, wheel assembly, rear walking transmission mechanism and biography
Moving axis, the front component is coupled by the preceding walking transmission mechanism with the main-gear box, the wheel assembly with it is described
Walking transmission mechanism connection afterwards, the rear walking transmission mechanism is connected by the power transmission shaft with the rear output shaft of the main-gear box
Connect, the steering include steering wheel, steering spindle, front steering gear, preceding tooth bar, power take-off gear, front steering double rocker mechanism,
Steering drive axle, trailing wheel change gear group, rear tooth bar and rear steering double rocker mechanism, the steering wheel by the steering spindle with
The front steering gear connection, the preceding tooth bar is connected by the front steering double rocker mechanism with the front component, described
Front steering gear is connected with the preceding tooth bar external toothing respectively with the power take-off gear, the trailing wheel change gear group with it is described after
Tooth bar engagement connection, the rear tooth bar is connected by the rear steering double rocker mechanism with the wheel assembly, the steering wheel
The steering axes are driven so that the preceding tooth bar is moved left and right and drives the front component to turn to swing, the power taking tooth
Wheel be connected with the trailing wheel change gear group by the steering drive axle, with drive the rear tooth bar towards with the preceding tooth bar
The opposite direction movement of moving direction, and drive the wheel assembly to turn to swing.
Further scheme, the trailing wheel change gear group include first gear, second gear and with the second gear
The 3rd coaxially connected gear, the first gear is connected and synchronous turn with the steering drive axle with the steering drive axle
Dynamic, the second gear is connected with the first gear external toothing, and the 3rd gear is connected with the rear tooth bar external toothing.
Further scheme, the front steering double rocker mechanism includes the first rocking bar, the second rocking bar and front rod, described
Front component includes the output end of a pair of front-wheels and the front axle being arranged between two front-wheels, first rocking bar and the second rocking bar
Be connected with described two front-drives respectively, the front rod be rotatably connected on the first rocking bar input and the second rocking bar it is defeated
Enter between end, the preceding tooth bar is fixedly connected with the front rod.
Further scheme, the rear steering double rocker mechanism includes the 3rd rocking bar, the 4th rocking bar and back link, described
Wheel assembly includes the output end of a pair of rear wheels and the rear axle being arranged between two trailing wheels, the 3rd rocking bar and the 4th rocking bar
Be connected with described two rear wheels respectively, the back link be rotatably connected on the 3rd rocking bar input and the 4th rocking bar it is defeated
Enter between end, the rear tooth bar is fixedly connected with the back link.
Further scheme, is additionally provided with the working output shaft for connecting farming instrument, the hair on the main-gear box
Belt pulley is additionally provided with second output shaft of motivation, the belt pulley is connected with for adjusting farming tool height by gear pump
Hydraulic lifting mechanism.
Further scheme, the hydraulic lifting mechanism includes oil pipe, hydraulic valve, hydraulic control lever and hoist cylinder,
The hydraulic control lever adjusts the break-make between the oil pipe and the hoist cylinder by controlling the hydraulic valve, to control
Piston is flexible in lifting hydraulic cylinder.
The beneficial effects of the utility model：
Miniature 4 wheel driven four-wheel steering greenhouse engine of the present utility model, its steering includes steering wheel, steering spindle, preceding
Tooth sector, preceding tooth bar, power take-off gear, front steering double rocker mechanism, steering drive axle, trailing wheel change gear group, rear tooth bar and
Rear steering double rocker mechanism, steering wheel is connected by steering spindle with front steering gear, and preceding tooth bar passes through front steering double rocker mechanism
Be connected with front component, front steering gear is connected with preceding tooth bar external toothing respectively with power take-off gear, trailing wheel change gear group with it is rear
Tooth bar engagement connection, rear tooth bar is connected by rear steering double rocker mechanism with wheel assembly, direction dish driving steering axes with
Move left and right preceding tooth bar and drive front component to turn to swing, power take-off gear is by steering drive axle and trailing wheel change gear group
Connection, is moved with tooth bar after driving towards the direction opposite with preceding tooth bar moving direction, and drives wheel assembly to turn to swing.With
Prior art is compared, and operating personnel are by controlling steering of the present utility model, you can realize front component and wheel assembly
Steering, due to the moving direction of rear tooth bar with the moving direction of preceding tooth bar conversely, therefore the rotation direction of wheel assembly with it is preceding
The rotation direction of wheel assembly conversely, and then reduce the radius of turn of engine, additionally, what front component and wheel assembly were turned to
When, four wheels all share side force, such that it is able to mitigate the side force that front-wheel is born when former front component is turned to, so
Front-wheel will not occur skidding because the side force for turning to is excessive, it is ensured that vehicle smoothly turns to, not out of hand, improves
It is vehicle safety, handling；Finally, four-wheel steering system of the present utility model mainly include gear, tooth bar, steering drive axle and
Double rocker mechanism, the structure of gear, tooth bar, steering drive axle and double rocker mechanism is relatively simple, therefore overall structure is also more
Simply.
Trailing wheel change gear group includes first gear, second gear and threeth gear coaxially connected with second gear, the
One gear be connected with steering drive axle and with steering drive axle synchronous axial system, second gear is connected with first gear external toothing,
Three gears are connected with rear tooth bar external toothing.It is so designed that, preceding rack drives steering drive axle is rotated, steering drive axle rotation direction
Rotation direction with front steering gear is identical, and steering drive axle drives second gear to rotate by first gear, due to the first tooth
Wheel is connected with second gear external toothing, thus the rotation direction of second gear and the rotation direction of front steering gear conversely, because
3rd gear is coaxially connected with second gear, thus the rotation direction of the 3rd gear and the rotation direction of front steering gear conversely,
The direction of tooth bar movement is in opposite direction with what preceding tooth bar was moved after i.e. so that front-wheel realizes opposite steering, overall knot with trailing wheel
Structure is relatively simple, and cost is relatively low.
Front steering double rocker mechanism includes the first rocking bar, the second rocking bar and front rod, front component include a pair of front-wheels and
It is arranged on the front axle between two front-wheels, the output end of the first rocking bar and the second rocking bar is connected with two front-drives respectively, preceding
Link rotatable is connected between the input of the input of the first rocking bar and the second rocking bar, and preceding tooth bar is fixedly connected with front rod.
It is so designed that, can moves left and right preceding rack drives front rod, to drive the first rocking bar to rotate, the second rocking bar is rotated and front axle
Motion, realizes that front-wheel steer swings, and structure is relatively simple, and overall dimensions are smaller.
Rear steering double rocker mechanism include the 3rd rocking bar, the 4th rocking bar and back link, wheel assembly include a pair of rear wheels and
It is arranged on the rear axle between two trailing wheels, the output end of the 3rd rocking bar and the 4th rocking bar is connected with two rear wheels respectively, after
Link rotatable is connected between the input of the 3rd rocking bar and the input of the 4th rocking bar, and rear tooth bar is fixedly connected with back link.
It is so designed that, can moves left and right rear rack drives back link, to drive the 3rd rocking bar to rotate, the 4th rocking bar is rotated and rear axle
Motion, realizes that rear-axle steering swings, and structure is relatively simple, and overall dimensions are smaller.
These features of the present utility model and advantage will be detailed in following specific embodiment, accompanying drawing exposure.
【Brief description of the drawings】
The utility model is described further below in conjunction with the accompanying drawings：
Fig. 1 is the structural representation of miniature 4 wheel driven four-wheel steering greenhouse engine in the utility model preferred embodiment；
Fig. 2 is the structure of the steering of miniature 4 wheel driven four-wheel steering greenhouse engine in the utility model preferred embodiment
Schematic diagram.
【Specific embodiment】
The technical scheme of the utility model embodiment is explained with reference to the accompanying drawing of the utility model embodiment and
Illustrate, but following embodiments are only preferred embodiment of the present utility model, and it is not all.Based on the embodiment in implementation method,
Those skilled in the art obtain other embodiment on the premise of creative work is not made, and belong to of the present utility model
Protection domain.
Referring to figs. 1 to shown in 2, the miniature 4 wheel driven four-wheel steering greenhouse engine in the present embodiment includes frame 1, frame 1
It is provided with engine 2, main-gear box 3, walking mechanism and the steering for driving walking mechanism to turn to, the of engine 2
One output shaft is connected by shaft coupling with the wet clutch on main-gear box 3, the wet clutch tool that the utility model is used
The characteristics of having long service life, main-gear box 3 is connected with walking mechanism, and walking mechanism includes front component, preceding walking driver
Structure 4, wheel assembly, rear walking transmission mechanism 6 and power transmission shaft, front component is by preceding walking transmission mechanism 4 and main-gear box 3
Front output shaft couples, and wheel assembly is connected with rear walking transmission mechanism 6, and rear walking transmission mechanism 6 is by power transmission shaft and main transformer speed
The rear output shaft connection of case 3, steering includes steering wheel 8, steering spindle 9, front steering gear 10, preceding tooth bar 11, power take-off gear
12nd, front steering double rocker mechanism, steering drive axle 16, trailing wheel change gear group 17, rear tooth bar 18 and rear steering double rocker mechanism.
Steering wheel 8 is connected by steering spindle 9 with front steering gear 10, i.e., steering wheel 8 drives steering spindle 9 to rotate and drive front steering gear
10 synchronous axial systems, preceding tooth bar 11 is connected by front steering double rocker mechanism with front component, front steering gear 10 and power take-off gear
12 are connected with the external toothing of preceding tooth bar 11 respectively, and power take-off gear 12 is fixedly connected with the input of steering drive axle 16, and trailing wheel becomes
Be connected between steering drive axle 16 and rear tooth bar 18 engage to gear train 17, rear tooth bar 18 by rear steering double rocker mechanism with
Wheel assembly is connected.
Wherein front steering double rocker mechanism includes the first rocking bar 14, the second rocking bar 15 and front rod 13, and front component includes
The output end of a pair of front-wheels 5 and the front axle 51 being arranged between two front-wheels 5, the first rocking bar 14 and the second rocking bar 15 is respectively with two
Individual front-wheel 5 rotates connection, and front rod 13 is rotatably connected between the input of the input of the first rocking bar 14 and the second rocking bar 15,
Preceding tooth bar 11 is fixedly connected with front rod 13, or preceding tooth bar 11 is integrally formed with front rod 13.
Rear steering double rocker mechanism includes the 3rd rocking bar 20, the 4th rocking bar 21 and back link 19, and wheel assembly includes a pair
The output end of trailing wheel 7 and the rear axle 71 being arranged between two trailing wheels 7, the 3rd rocking bar 20 and the 4th rocking bar 21 respectively with two after
Wheel 7 rotates connection, and back link 19 is rotatably connected between the input of the 3rd rocking bar 20 and the input of the 4th rocking bar 21, rear tooth
Bar 18 is fixedly connected with back link 19, or rear tooth bar 18 is integrally formed with back link 19.
Trailing wheel change gear group 17 includes first gear 171, the gear 173 of second gear 172 and the 3rd, the 3rd gear 173
Be connected and synchronous axial system by axle with second gear 172, first gear 171 be connected with the output end of steering drive axle 16 and with turn
To the synchronous axial system of power transmission shaft 16, second gear 172 is connected with the external toothing of first gear 171, outside the 3rd gear 173 and rear tooth bar 18
Engagement connection.
During steering, to drive steering spindle 9 to rotate, steering spindle 9 drives front steering gear 10 same to operating personnel's steering wheel rotation 8
Step is rotated, and front steering gear 10 drives preceding tooth bar 11 to move left and right, and now moving left and right for preceding tooth bar 11 can drive front rod 13
Move left and right, front rod 13 moves left and right drive, and the first rocking bar 14 is rotated, the second rocking bar 15 is rotated and front axle 51 is moved, before realization
Wheel 5 is turned to and swung, and structure is relatively simple, and overall dimensions are smaller.At the same time, moving left and right for preceding tooth bar 11 can also drive power taking
Gear 12 is rotated, and the rotation direction of power take-off gear 12 is identical with the rotation direction of front steering gear 10, power take-off gear 12 turn
It is dynamic to drive the synchronous axial system of steering drive axle 16, steering drive axle 16 to drive the synchronous axial system of first gear 171 and drive second gear
172 rotate, because first gear 171 and the external toothing of second gear 172 are connected, therefore the rotation direction of second gear 172 and the
One gear 171 is conversely, i.e. with the rotation direction of front steering gear 10 conversely, the now namely rotation direction of the 3rd gear 173
With the rotation direction of front steering gear 10 conversely, after i.e. the movement of tooth bar 18 reversely with the moving direction of preceding tooth bar 11 conversely, after
Tooth bar 18 drives back link 19 to move left and right, and to drive the 3rd rocking bar 20 to rotate, the 4th rocking bar 21 is rotated and rear axle 71 is moved,
Realize that trailing wheel 7 is turned to swing, and the steering of trailing wheel 7 is opposite with the steering of front-wheel 5.
To sum up, compared with prior art, operating personnel are by controlling steering of the present utility model, you can realize front-wheel
The steering of component and wheel assembly, due to the moving direction of rear tooth bar 18 with the moving direction of preceding tooth bar 11 conversely, therefore trailing wheel
The rotation direction of component and the rotation direction of front component conversely, and then reduce the radius of turn of engine, be used in it
Less working space, additionally, when front component and wheel assembly are turned to, four wheels all share side force, so that can
To mitigate the side force that front-wheel is born when former front component is turned to, such front-wheel will not occur because the side force for turning to is excessive
Skidding, it is ensured that vehicle smoothly turns to, not out of hand, improves vehicle safety, handling；Finally, this practicality is new
The four-wheel steering system of type mainly includes gear, tooth bar, steering drive axle and double rocker mechanism, gear, tooth bar, steering drive axle
Structure with double rocker mechanism is relatively simple, therefore overall structure is also relatively simple, easy processing, and easy to assembly.
Certainly, in other embodiment of the present utility model, rear steering gear train can also only include first gear and second
Gear, first gear is connected with the output end of steering drive axle, and first gear is connected with second gear external toothing, and second gear
It is connected with rear tooth bar external toothing, its effect that can also reach this practical preferred embodiment substantially will not be repeated here.
Finally, the working output shaft 26 for connecting farming instrument is additionally provided with main-gear box 3, the second of engine 2 is defeated
Belt pulley is additionally provided with shaft, belt pulley is connected with the hydraulic lifting mechanism for adjusting farming tool height by gear pump.
Hydraulic lifting mechanism includes oil pipe, hydraulic valve, hydraulic control lever 23 and hoist cylinder 25, is controlled by adjusting hydraulic control lever 23
Hydraulic valve processed, the break-make between oil pipe and hoist cylinder 25 is adjusted with this, realizes the flexible of piston in lifting hydraulic cylinder 25.
Preferably, seat 24 is additionally provided with the frame 1 in this preferred embodiment, it is tired in operation process to reduce user
Labor degree.
The above, specific embodiment only of the present utility model, but protection domain of the present utility model do not limit to
In this, it is familiar with the those skilled in the art and should be understood that the utility model including but not limited to accompanying drawing and above specific embodiment party
Content described in formula.Any modification without departing from function and structure principle of the present utility model is intended to be included in claims
Scope in.
Claims (6)
1. a kind of miniature 4 wheel driven four-wheel steering greenhouse engine, including frame, the frame be provided with engine, main-gear box,
Walking mechanism and the steering for driving the walking mechanism to turn to, the first output shaft of the engine pass through shaft coupling
It is connected with the wet clutch on main-gear box, the main-gear box is connected to drive the walking mechanism with the walking mechanism
Walking, the walking mechanism includes front component, preceding walking transmission mechanism, wheel assembly, rear walking transmission mechanism and power transmission shaft,
The front component is coupled by the preceding walking transmission mechanism with the main-gear box, the wheel assembly and it is described after walking
Transmission mechanism is connected, and the rear walking transmission mechanism is connected by the power transmission shaft with the rear output shaft of the main-gear box, its
It is characterised by, the steering includes that steering wheel, steering spindle, front steering gear, preceding tooth bar, power take-off gear, front steering are double and shakes
Linkage, steering drive axle, trailing wheel change gear group, rear tooth bar and rear steering double rocker mechanism, the steering wheel is by described
Steering spindle is connected with the front steering gear, and the preceding tooth bar is connected by the front steering double rocker mechanism and the front component
Connect, the front steering gear is connected with the preceding tooth bar external toothing respectively with the power take-off gear, the trailing wheel change gear group
It is connected with the rear tooth bar engagement, the rear tooth bar is connected by the rear steering double rocker mechanism with the wheel assembly, institute
Steering axes described in the dish driving of direction are stated so that the preceding tooth bar is moved left and right and drives the front component to turn to swing, institute
Power take-off gear is stated to be connected with the trailing wheel change gear group by the steering drive axle, with drive the rear tooth bar towards with institute
The opposite direction movement of preceding tooth bar moving direction is stated, and drives the wheel assembly to turn to and swung.
2. miniature 4 wheel driven four-wheel steering greenhouse engine according to claim 1, it is characterised in that the trailing wheel deflecting tooth
Wheel group includes first gear, second gear and threeth gear coaxially connected with the second gear, the first gear and institute
State steering drive axle connection and with the steering drive axle synchronous axial system, the second gear connects with the first gear external toothing
Connect, the 3rd gear is connected with the rear tooth bar external toothing.
3. miniature 4 wheel driven four-wheel steering greenhouse engine according to claim 2, it is characterised in that the front steering is double to shake
Linkage includes the first rocking bar, the second rocking bar and front rod, and the front component includes a pair of front-wheels and is arranged on two front-wheels
Between front axle, the output end of first rocking bar and the second rocking bar is connected with described two front-drives respectively, it is described before connect
Bar is rotatably connected between the input of the input of the first rocking bar and the second rocking bar, and the preceding tooth bar is fixed with the front rod
Connection.
4. miniature 4 wheel driven four-wheel steering greenhouse engine according to claim 3, it is characterised in that the rear steering is double to shake
Linkage includes the 3rd rocking bar, the 4th rocking bar and back link, and the wheel assembly includes a pair of rear wheels and is arranged on two trailing wheels
Between rear axle, the output end of the 3rd rocking bar and the 4th rocking bar is connected with described two rear wheels respectively, it is described after connect
Bar is rotatably connected between the input of the 3rd rocking bar and the input of the 4th rocking bar, and the rear tooth bar is fixed with the back link
Connection.
5. miniature 4 wheel driven four-wheel steering greenhouse engine according to claim 1, it is characterised in that on the main-gear box
The working output shaft for connecting farming instrument is additionally provided with, belt pulley is additionally provided with the second output shaft of the engine, it is described
Belt pulley is connected with the hydraulic lifting mechanism for adjusting farming tool height by gear pump.
6. miniature 4 wheel driven four-wheel steering greenhouse engine according to claim 5, it is characterised in that the hydraulic hoisting machine
Structure includes oil pipe, hydraulic valve, hydraulic control lever and hoist cylinder, and the hydraulic control lever is by controlling the hydraulic valve to adjust
Break-make between the oil pipe and the hoist cylinder, to control the flexible of piston in lifting hydraulic cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621338803.9U CN206231439U (en) | 2016-12-07 | 2016-12-07 | A kind of miniature 4 wheel driven four-wheel steering greenhouse engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621338803.9U CN206231439U (en) | 2016-12-07 | 2016-12-07 | A kind of miniature 4 wheel driven four-wheel steering greenhouse engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206231439U true CN206231439U (en) | 2017-06-09 |
Family
ID=58978788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621338803.9U Expired - Fee Related CN206231439U (en) | 2016-12-07 | 2016-12-07 | A kind of miniature 4 wheel driven four-wheel steering greenhouse engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206231439U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112937679A (en) * | 2021-04-01 | 2021-06-11 | 哈工大机器人（合肥）国际创新研究院 | Four-wheel steering mechanism |
| CN115056899A (en) * | 2022-06-21 | 2022-09-16 | 好孩子儿童用品有限公司 | Children toy car |
-
2016
- 2016-12-07 CN CN201621338803.9U patent/CN206231439U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112937679A (en) * | 2021-04-01 | 2021-06-11 | 哈工大机器人（合肥）国际创新研究院 | Four-wheel steering mechanism |
| CN112937679B (en) * | 2021-04-01 | 2022-11-04 | 合肥哈工农机智能科技有限公司 | Four-wheel steering mechanism |
| CN115056899A (en) * | 2022-06-21 | 2022-09-16 | 好孩子儿童用品有限公司 | Children toy car |
| CN115056899B (en) * | 2022-06-21 | 2024-04-05 | 好孩子儿童用品有限公司 | Toy car for children |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170609 Termination date: 20191207 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |