CN212184236U - Keep away barrier grass cutting device - Google Patents
Keep away barrier grass cutting device Download PDFInfo
- Publication number
- CN212184236U CN212184236U CN201922086805.3U CN201922086805U CN212184236U CN 212184236 U CN212184236 U CN 212184236U CN 201922086805 U CN201922086805 U CN 201922086805U CN 212184236 U CN212184236 U CN 212184236U
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- swing arm
- cutting
- rotatably connected
- transmission
- obstacle
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- 230000004888 barrier function Effects 0.000 title abstract description 15
- 244000025254 Cannabis sativa Species 0.000 title abstract description 10
- 230000007246 mechanism Effects 0.000 claims abstract description 63
- 230000005540 biological transmission Effects 0.000 claims description 44
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 230000003028 elevating effect Effects 0.000 abstract description 4
- 238000012876 topography Methods 0.000 abstract description 2
- 230000006378 damage Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000009333 weeding Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
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Abstract
The utility model provides an obstacle-avoiding mowing device, which comprises a bracket, a lifting mechanism, a swing arm and a cutting mechanism; the first end of the lifting mechanism is rotatably connected with the bracket, the first end of the swing arm is rotatably connected with the second end of the lifting mechanism, and the cutting mechanism is arranged at the second end of the swing arm. The lifting mechanism and the swing arm work in a matched mode, the spatial position of the cutting mechanism can be effectively controlled, the height of the cutting mechanism above the ground can be adjusted in real time to adjust the stubble cutting height, and the operation is more flexible. Adopt elevating system and swing arm, can be according to the topography demand of the operation of mowing the real-time position of adjustment mowing mechanism, guaranteed effectively that mowing mechanism can get into smoothly and protect the fender inter-row space and carry out the operation of mowing, keep away the barrier and mow the mechanism and can outwards remove and avoid the barrier when meetting the barrier moreover, improved the application environment who keeps away barrier grass cutting device effectively, more can be used to reality.
Description
Technical Field
The utility model relates to a sanitation machinery especially relates to a keep away barrier grass cutting device.
Background
Along with the development and progress of the country, the beautiful environment along the road is more and more emphasized, and the trimming of the weeds on the road becomes an indispensable part of the road appearance activity. Because the road all is provided with fender facility along the line, current automatic mowing equipment can't get into and protect fender row spacing and carry out the operation, mainly still adopt manual mowing or hand-held type grass cutting device to mow at present, the former wastes time and energy, and efficiency is low, the latter noise is big, and the injury to labourer's health is great to the grass bits that produces during mowing. Therefore, the development of more professional mowing equipment for efficiently weeding has important significance in saving the cost and time of weeding operation, better building beautiful roads, strengthening road appearance management and better guaranteeing the personal safety of operators.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
The utility model provides a keep away barrier grass cutting device aims at solving the terrain clearance of unable adjustment blade, and can't prune fast and protect the problem of keeping off weeds between the line spacing.
(II) technical scheme
In order to achieve the above object, the utility model discloses a main technical scheme include:
the obstacle-avoiding and mowing device comprises a bracket, a lifting mechanism, a swing arm and a cutting mechanism;
the first end of the lifting mechanism is rotatably connected with the bracket, the first end of the swing arm is rotatably connected with the second end of the lifting mechanism, and the cutting mechanism is arranged at the second end of the swing arm;
the bracket is provided with a rotating assembly and a limiting pin, and the limiting pin is used for fixing the rotating position of the rotating assembly;
the lifting mechanism comprises a lifting arm, a first telescopic cylinder, a second telescopic cylinder and a connecting piece; the first end of the lifting arm is rotatably connected with the rotating assembly, and the second end of the lifting arm is rotatably connected with the connecting piece; the bottom ends of the first telescopic cylinder and the second telescopic cylinder are rotatably connected with the rotating assembly, the top end of the first telescopic cylinder is rotatably connected with the lifting arm, and the top end of the second telescopic cylinder is rotatably connected with the connecting piece; the first end of the swing arm is rotatably connected with the connecting piece.
Preferably, the connecting piece comprises a connecting main body, a first connecting branch and a second connecting branch, first ends of the first connecting branch and the second connecting branch are fixedly connected with the connecting main body, and a second end of the lifting arm and a top end of the second telescopic cylinder are rotatably connected with the connecting main body; the first end of swing arm with the second end of first connection branch rotates and is connected, the second end of swing arm is provided with the mount pad, cutting mechanism set up in on the mount pad.
Preferably, the swing arm still includes the locating part, the locating part includes connecting screw and cover and establishes spring on the connecting screw, connecting screw's first end with the second end of second connection branch is rotated and is connected, connecting screw's second end with the swing arm is connected.
Preferably, the limiting member is an electric telescopic rod.
Preferably, a connecting hole is formed in the swing arm, and the connecting screw penetrates through the connecting hole and is locked through a nut.
Preferably, the cutting mechanism comprises a mounting frame, a hydraulic motor, a transmission assembly and a blade assembly;
the mounting bracket is fixed set up in the second of swing arm is served, hydraulic motor the transmission subassembly and the cutting edge subassembly all set up in on the mounting bracket, just hydraulic motor passes through the transmission subassembly drive the cutting edge subassembly is rotatory.
Preferably, the transmission assembly comprises a transmission shaft and a transmission wheel, the first end of the transmission shaft is connected with the output shaft of the hydraulic motor through a coupler, the second end of the transmission shaft is connected with the mounting frame through a bearing, and the transmission wheel is fixedly sleeved on the transmission shaft.
Preferably, the cutting edge assembly comprises a cutting shaft, a driven wheel, a transmission belt and a blade, the cutting shaft is arranged on the mounting frame through a bearing, the driven wheel and the blade are fixedly sleeved on the cutting shaft, and the driven wheel is connected with the transmission belt.
Preferably, the cutting mechanism comprises three cutting edge assemblies, cutting surfaces of three blades are in the same plane, the axis of the transmission shaft is perpendicular to the plane, the distances from the central points of the cutting surfaces of the three blades to a vertical point are equal, and the central points of the cutting surfaces of the three blades are 120 degrees away from each other.
Preferably, the blade assembly further comprises a baffle plate disposed on the mounting bracket.
(III) advantageous effects
The utility model has the advantages that: the lifting mechanism and the swing arm work in a matched mode, the spatial position of the cutting mechanism can be effectively controlled, the height of the cutting mechanism above the ground can be adjusted in real time to adjust the stubble cutting height, and the operation is more flexible. Adopt elevating system and swing arm, can be according to the topography demand of the operation of mowing the real-time position of adjustment mowing mechanism, guaranteed effectively that mowing mechanism can get into smoothly and protect the fender inter-row space and carry out the operation of mowing, keep away the barrier and mow the mechanism and can outwards remove and avoid the barrier when meetting the barrier moreover, improved the application environment who keeps away barrier grass cutting device effectively, more can be used to reality.
Drawings
Fig. 1 is a schematic view of the overall structure of the obstacle-avoiding mowing device of the present invention;
fig. 2 is a schematic structural view of a swing arm of the obstacle-avoiding mowing device of the present invention;
fig. 3 is a top view of the connecting member of the obstacle-avoiding mowing device of the present invention.
[ description of reference ]
11: a rotating assembly; 12: a spacing pin;
21: a first telescoping cylinder; 22: a second telescoping cylinder; 23: a lifting arm;
24: a connecting member; 241: a first connecting branch; 242: a second connecting branch; 243: a connecting body;
31: swinging arms; 32: a mounting seat;
33: a limiting member; 331: connecting a screw rod; 332: a spring;
41: a hydraulic motor; 42: a mounting frame;
431: a drive shaft;
441: cutting the shaft; 442: a blade; 443: and a baffle plate.
Detailed Description
For a better understanding of the present invention, reference will now be made in detail to the present invention, examples of which are illustrated in the accompanying drawings.
It should be noted that all the directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The utility model provides a keep away barrier grass cutting device as shown in figure 1, keep away barrier grass cutting device includes bracket, elevating system, swing arm 31 and cutting mechanism. The bracket is fixedly arranged on mobile equipment, such as the head or tail of a vehicle, mobile equipment for special operation and the like. The first end of the lifting mechanism is rotatably connected with the bracket, the rotating direction comprises horizontal rotation and up-and-down swinging, the horizontal rotation can be realized by manual adjustment or additional installation of a driving mechanism, and the up-and-down swinging can be realized by a hydraulic mechanism. In a preferred embodiment, the bracket is provided with a rotating assembly 11 and a limiting pin 12, the limiting pin 12 is used for fixing the rotating position of the rotating assembly 11, and after the rotating assembly 11 rotates to the set position, the rotating assembly 11 is fixed through the limiting pin 12, so that the rotating assembly 11 is prevented from being displaced in the mowing operation process, and the swing arm 31 and the cutting mechanism are prevented from being displaced and damaged. Specifically, referring again to fig. 1, the lifting mechanism includes a lifting arm 23, a first telescopic cylinder 21, a second telescopic cylinder 22, and a connecting member 24. Wherein, the first end of lifing arm 23 is connected with rotating assembly 11 through the bearing rotation, and the rotation form is: swinging up and down with the first end of the lifting arm 23 and the connecting point of the rotating component 11 as the center. The second end of the lifting arm 23 is rotatably connected with the connecting piece 24 through a bearing, and the rotation mode is up-and-down swing by taking the connecting point of the lifting arm 23 and the connecting piece 24 as a circle center. The bottom ends of the first telescopic cylinder 21 and the second telescopic cylinder 22 are rotatably connected with the rotating assembly 11 through bearings, and the rotating forms are up-and-down swinging with the connecting point of the rotating assembly 11 as the center of circle. The top end of the first telescopic cylinder 21 is rotatably connected with the lifting arm 23 through a bearing, and the position of the connection point is determined according to the arm length of the lifting arm 23, so that better stress can be ensured when the lifting arm 23 swings upwards, and the acting force of the first telescopic cylinder 21 is reduced. The top end of the second telescopic cylinder 22 is rotatably connected with a connecting piece 24. The first telescopic cylinder 21 and the second telescopic cylinder 22 are used in a matched mode, and the specific operation mode is as follows: when the lifting mechanism swings upward, the first telescopic cylinder 21 is shortened, and the second telescopic cylinder 22 is extended. When the lifting mechanism swings downward, the first telescopic cylinder 21 extends and the second telescopic cylinder 22 shortens. The first telescopic cylinder 21 and the second telescopic cylinder 22 are matched for use, so that the lifting arm 23 can be swung more stably, the bearing capacity of the lifting arm 23 is improved, and the stability of the swinging arm 31 and the cutting mechanism in the operation process is ensured.
Further, a first end of the swing arm 31 is rotatably connected to a second end of the lifting mechanism, and preferably, the first end of the swing arm 31 is rotatably connected to the connecting member 24, and the rotation is in the form of horizontal swing with a connecting point of the swing arm 31 and the connecting member 24 as a center. In addition, cutting mechanism sets up in the second end of swing arm 31, and elevating system and swing arm 31 control cutting mechanism's spatial position through the swing of a plurality of directions to can realize effectively that cutting mechanism's accurate location when mowing, simultaneously, avoid the barrier through the spatial position who changes cutting mechanism, save a large amount of manual works, greatly degree has improved work efficiency.
Furthermore, the connecting element 24 includes a connecting body 243, a first connecting branch 241 and a second connecting branch 242, wherein the first ends of the first connecting branch 241 and the second connecting branch 242 are fixedly connected to the connecting body 243, as shown in fig. 3, the top view of the connecting element 24 is a Y-shaped structure. The second end of the lifting arm 23 and the top end of the second telescopic cylinder 22 are both rotatably connected to the connecting body 243 in the manner described above. Referring to fig. 2, the first end of the swing arm 31 is rotatably connected to the second end of the first connecting branch 241, preferably, the swing arm 31 is connected to the rotating cylinder, and the rotation mode is that the swing arm 31 horizontally swings around the connecting point of the first end of the swing arm 31 and the second end of the first connecting branch 241. The second end of the swing arm 31 is provided with a mounting seat 32, and the cutting mechanism is fixedly mounted on the mounting seat 32.
Preferably, the swing arm 31 further includes a limiting member 33, the limiting member 33 includes a connecting screw rod 331 and a spring 332 sleeved on the connecting screw rod 331, a first end of the connecting screw rod 331 is rotatably connected to a second end of the second connecting branch 242, preferably, the connecting screw rod 331 is connected to a rotating cylinder, the rotating mode is that a connecting point of the first end of the connecting screw rod 331 and the second end of the second connecting branch 242 is a circle, and the connecting screw rod 331 horizontally swings. The second end of the connecting screw 331 is connected with the swing arm 31, a connecting hole is arranged on the swing arm 31, and the connecting screw 331 penetrates through the connecting hole and is locked by a nut. When the swing arm 31 swings horizontally, only the nut needs to be adjusted, the swing angle of the swing arm 31 is changed by changing the length of the connecting screw 331 from the second end of the second connecting branch 242 to the connecting hole, the spring 332 sleeved on the connecting screw 331 is compressed between the second end of the second connecting branch 242 and the connecting hole, and is supported by the elastic force of the spring 332, and the swing arm 31 swings to a set position and then is fixed. Further, the swing arm 31 has a certain swing toughness even after swinging to a set position and fixing due to the elastic force of the spring 332, and even if the cutting mechanism collides with a hard object during mowing, the swing arm 31 can prevent the mechanism from being damaged by its own escape space. In a preferred embodiment, the stopper 33 may be an electric telescopic rod, and a spring mechanism may be added to one end of the electric telescopic rod to achieve the above-described avoidance effect.
Referring again to fig. 1, the cutting mechanism includes a mounting bracket 42, a hydraulic motor 41, a transmission assembly, and a blade assembly. The mounting bracket 42 is fixedly arranged at the second end of the swing arm 31, the hydraulic motor 41, the transmission assembly and the blade assembly are all arranged on the mounting bracket 42, and the hydraulic motor 41 drives the blade assembly to rotate through the transmission assembly.
Specifically, the transmission assembly comprises a transmission shaft 431 and a transmission wheel, a first end of the transmission shaft 431 is connected with an output shaft of the hydraulic motor 41 through a coupler, a second end of the transmission shaft 431 is connected with the mounting frame 42 through a bearing, and the transmission wheel is fixedly sleeved on the transmission shaft 431. The cutting edge assembly comprises a cutting shaft 441, a driven wheel, a transmission belt and a blade 442, the cutting shaft 441 is arranged on the mounting frame 42 through a bearing, the driven wheel and the blade 442 are fixedly sleeved on the cutting shaft 441, and the driven wheel is connected with the transmission belt. The transmission belt has elasticity, can alleviate impact and vibration load, and has stable operation and no noise. During overload, the driving belt slips on the driving wheel and the driven wheel, damage to the cutting mechanism is effectively avoided, and the driving belt is simple in driving structure, low in equipment cost and convenient to maintain.
In the preferred embodiment, the cutting mechanism includes three blade assemblies, wherein the cutting surfaces of the three blades 442 are in the same plane and the axis of the drive shaft 431 is perpendicular to the plane of the cutting surfaces of the three blades 442. The center points of the cutting surfaces of the three blades 442 are equidistant from the drop foot, and the center points of the cutting surfaces of the three blades 442 are spaced 120 ° from each other. Specifically, the center points of the cutting surfaces of the three blades 442 are located on the circumference of the same circle, and the lengths of the arcs separated from each other are equal, and the center of the circle is the foot of the shaft center of the transmission shaft 431 and the plane. The blade assembly further includes a baffle 443, the baffle 443 being disposed on the mounting bracket 42; in a preferred embodiment, the blocking plate 443 is preferably a circular disk, the circular disk is fixedly installed on the mounting frame 42, the cutting shaft 441 is vertically connected with the center of the circular disk through a bearing, the cutting shaft 441 penetrating through the upper surface of the circular disk is used for installing the driven wheel, and the cutting shaft 441 penetrating through the lower surface of the circular disk is used for installing the blade 442. The disc is parallel with the cutting surface of the blade 442, and the disc can completely shield the cutting surface of the blade 442, so that the disc can isolate the transmission assembly from the cutting surface, and sundries splashed in the mowing process are prevented from entering the transmission assembly to damage the transmission assembly and the body of a constructor.
When the mowing machine is used for mowing, the lifting mechanism and the swing arm 31 work in a matching mode, the space position of the cutting mechanism can be effectively controlled, meanwhile, the height of the cutting mechanism above the ground can be adjusted in real time, and the operation is more flexible. By adopting the lifting mechanism and the swing arm 31, the real-time position of the mowing mechanism can be adjusted according to the terrain requirement of mowing operation, the mowing mechanism can be effectively guaranteed to smoothly enter into the guard line space for mowing operation, the obstacle-avoiding mowing mechanism can move outwards to avoid obstacles when encountering the obstacles, the application environment of the obstacle-avoiding mowing device is effectively improved, and the obstacle-avoiding mowing device can be more practically used.
It should be understood that the above description of the embodiments of the present invention is only for illustrating the technical lines and features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention accordingly, but the present invention is not limited to the above specific embodiments. All changes and modifications that come within the scope of the claims are to be embraced within their scope.
Claims (10)
1. The obstacle-avoiding mowing device is characterized by comprising a bracket, a lifting mechanism, a swing arm and a cutting mechanism;
the first end of the lifting mechanism is rotatably connected with the bracket, the first end of the swing arm is rotatably connected with the second end of the lifting mechanism, and the cutting mechanism is arranged at the second end of the swing arm;
the bracket is provided with a rotating assembly and a limiting pin, and the limiting pin is used for fixing the rotating position of the rotating assembly;
the lifting mechanism comprises a lifting arm, a first telescopic cylinder, a second telescopic cylinder and a connecting piece; the first end of the lifting arm is rotatably connected with the rotating assembly, and the second end of the lifting arm is rotatably connected with the connecting piece; the bottom ends of the first telescopic cylinder and the second telescopic cylinder are rotatably connected with the rotating assembly, the top end of the first telescopic cylinder is rotatably connected with the lifting arm, and the top end of the second telescopic cylinder is rotatably connected with the connecting piece; the first end of the swing arm is rotatably connected with the connecting piece.
2. A barrier-avoiding mowing device as claimed in claim 1, wherein the connecting member comprises a connecting body, a first connecting branch and a second connecting branch, first ends of the first connecting branch and the second connecting branch are both fixedly connected with the connecting body, and second ends of the lifting arm and a top end of the second telescopic cylinder are both rotatably connected with the connecting body; the first end of swing arm with the second end of first connection branch rotates and is connected, the second end of swing arm is provided with the mount pad, cutting mechanism set up in on the mount pad.
3. An obstacle-avoiding mowing device according to claim 2, wherein the swing arm further comprises a limiting member, the limiting member comprises a connecting screw rod and a spring sleeved on the connecting screw rod, a first end of the connecting screw rod is rotatably connected with a second end of the second connecting branch, and a second end of the connecting screw rod is connected with the swing arm.
4. An obstacle-avoiding mowing device according to claim 3, wherein the limiting member is an electric telescopic rod.
5. An obstacle-avoiding mowing device according to claim 3, wherein the swing arm is provided with a connecting hole, and the connecting screw penetrates through the connecting hole and is locked by a nut.
6. A barrier-avoiding mowing device according to any one of claims 1 to 5, wherein the cutting mechanism comprises a mounting frame, a hydraulic motor, a transmission assembly and a blade assembly;
the mounting bracket is fixed set up in the second of swing arm is served, hydraulic motor the transmission subassembly and the cutting edge subassembly all set up in on the mounting bracket, just hydraulic motor passes through the transmission subassembly drive the cutting edge subassembly is rotatory.
7. An obstacle-avoiding mowing device according to claim 6, wherein the transmission assembly comprises a transmission shaft and a transmission wheel, a first end of the transmission shaft is connected with an output shaft of the hydraulic motor through a coupler, a second end of the transmission shaft is connected with the mounting frame through a bearing, and the transmission wheel is fixedly sleeved on the transmission shaft.
8. An obstacle-avoiding mowing device according to claim 7, wherein the blade assembly comprises a cutting shaft, a driven wheel, a transmission belt and a blade, the cutting shaft is arranged on the mounting frame through a bearing, the driven wheel and the blade are fixedly sleeved on the cutting shaft, and the driven wheel is connected with the transmission wheel through the transmission belt.
9. An obstacle-avoiding mowing device according to claim 8, wherein the cutting mechanism comprises three cutting edge assemblies, cutting surfaces of three blades are in the same plane, the axis of the transmission shaft is perpendicular to the plane, the distances from the center points of the cutting surfaces of the three blades to the perpendicular point are equal, and the center points of the cutting surfaces of the three blades are spaced by 120 ° from each other.
10. An obstacle avoidance mowing device according to claim 9, wherein the blade assembly further comprises a baffle plate disposed on the mounting frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922086805.3U CN212184236U (en) | 2019-11-27 | 2019-11-27 | Keep away barrier grass cutting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922086805.3U CN212184236U (en) | 2019-11-27 | 2019-11-27 | Keep away barrier grass cutting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212184236U true CN212184236U (en) | 2020-12-22 |
Family
ID=73806966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922086805.3U Expired - Fee Related CN212184236U (en) | 2019-11-27 | 2019-11-27 | Keep away barrier grass cutting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212184236U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113575094A (en) * | 2021-08-02 | 2021-11-02 | 江苏中泽汽车科技有限公司 | Greening comprehensive maintenance vehicle with preposed obstacle avoidance, mowing and collision avoidance functions |
-
2019
- 2019-11-27 CN CN201922086805.3U patent/CN212184236U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113575094A (en) * | 2021-08-02 | 2021-11-02 | 江苏中泽汽车科技有限公司 | Greening comprehensive maintenance vehicle with preposed obstacle avoidance, mowing and collision avoidance functions |
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| 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: 20201222 |
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| CF01 | Termination of patent right due to non-payment of annual fee |