CN209634706U - Full immersed type underwater propeller and electronic kickboard - Google Patents
Full immersed type underwater propeller and electronic kickboard Download PDFInfo
- Publication number
- CN209634706U CN209634706U CN201920198448.7U CN201920198448U CN209634706U CN 209634706 U CN209634706 U CN 209634706U CN 201920198448 U CN201920198448 U CN 201920198448U CN 209634706 U CN209634706 U CN 209634706U
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- China
- Prior art keywords
- screw blade
- base portion
- immersed type
- type underwater
- driving motor
- 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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Abstract
The utility model relates to the technical fields of underwater navigation equipment, provide a kind of full immersed type underwater propeller and electronic kickboard, it includes propeller housing, screw blade, driving motor, motor shaft and pod, propeller housing includes an installation base portion, installing base portion has the first opposite side and second side, and screw blade is located at the side of first side of installation base portion；Driving motor is for rotating screw blade, and driving motor includes stationary part and rotor portion, and stationary part is fixed in second side of the installation base portion；Motor shaft has opposite first end and second end, and the first end of motor shaft and the stationary part of driving motor are fixed, and second end is extended to except driving motor and connect with screw blade；Pod setting is provided with spline structure between installation base portion and screw blade between motor shaft and screw blade, relatively rotated with both limitations.It is compared with the prior art, speed of moving under water can be greatly improved, and there is longer service life.
Description
Technical field
The utility model relates to the technical field of underwater navigation equipment, more particularly, to a kind of full immersed type underwater propeller and
Electronic kickboard.
Background technique
The existing main mode of submersible machine, which is that transformation is outer, turns brushless motor, by its stator and rotor application anticorrosion labourer
Skill processing, realizes waterproof, and stator and rotor cannot be dismantled, once there is impurity to enter motor, will be unable to maintenance process；In addition, paddle
Leaf is installed on rotor, and since rotor itself also has diameter, the effective area of blade reduces, and is generated under same power
Thrust can also reduce.
Utility model content
The purpose of this utility model is to provide a kind of full immersed type underwater propeller and electronic kickboards, to solve the prior art
Present in screw blade and the effective area of water flow phase separation utilization rate it is lower, and the technology of motor inconvenience detachable maintaining
Problem.
Full immersed type underwater propeller provided by the utility model, comprising:
Propeller housing comprising an installation base portion, the installation base portion have the first opposite side and second side；
Screw blade, positioned at the side of first side；
Driving motor, for rotating the screw blade, the driving motor includes stationary part and rotor portion, institute
Stationary part is stated to be fixed in described second side；
Motor shaft, with opposite first end and second end, the stationary part of the first end and the driving motor
Fixed, the second end is extended to except the driving motor and is connect with the screw blade；And
Pod, for guiding water flow to the screw blade, the pod is arranged in the installation base portion and institute
It states between screw blade；
It is provided with spline structure between the motor shaft and the screw blade, is relatively rotated with both limitations.
Further, the stationary part includes the hollow support shaft and the peace for wearing the installation base portion setting
Fill the fixed circular stator base of base portion and the iron core component for coiling winding；The stator base, which has, supplies the branch
The axis pilot hole that support axis passes through, the support shaft are threadedly coupled fixation with the stator base；The iron core component is set in institute
It states on the outside of support shaft, the support shaft has the shaft through-hole passed through for the motor shaft, and the motor shaft is set with the support shaft
It is equipped with bearing；The rotor portion includes rotor endcap, cylindric rotor case, multiple magnetic elements, and to by institute
State the magnet holder for the circular ring shape that magnetic element is maintained on the rotor case；The of the rotor endcap and the motor shaft
One end is fixed, and the rotor case is set on the periphery of the stationary part, and multiple magnetic elements are arranged at described turn
The inside of subshell, and being provided at circumferentially spaced along rotor case.
Further, it is convexly equipped on the outer wall of the support shaft opposite with the stator base to limit the support shaft
Mobile locating flange.
Further, multiple first fixation holes are offered in the stator base, multiple first fixation holes are wound around
The periphery of the axis pilot hole；It is offered on the installation base portion of the propeller housing corresponding multiple with first fixation hole
Second fixation hole offers multiple third fixation holes corresponding with second fixation hole on the pod.
Further, the spline structure includes that the first non-circular hole being opened on the screw blade and setting exist
The interconnecting piece to match on the motor shaft and with the shape of first non-circular hole；The screw blade passes through blade nut
It is fixed on the motor shaft, threaded portion is formed on the outer wall of the interconnecting piece, is formed on the inner wall of the blade nut
With the thread fiting part of threaded portion cooperation.
Further, gasket is arranged on the interconnecting piece, the gasket has to match with the shape of the interconnecting piece
The second non-circular hole, the opposite with the one end for being connected with the blade nut another of the screw blade is arranged in the gasket
On one end.
Further, the hemispherical shape of the pod, the pod is from the installation base portion to the screw blade
Direction radius it is tapered.
Further, the screw blade includes propeller cylinder and multiple blades, and multiple blades are alternate to be surrounded on the spiral shell
Revolve the periphery of paddle cylinder.
Further, obturator is provided in the driving motor, the obturator covers the stationary part.
Electronic kickboard provided by the utility model, including above-mentioned full immersed type underwater propeller.
It is compared with the prior art, full immersed type underwater propeller provided by the utility model, including propeller housing, propeller
Leaf, driving motor, motor shaft and pod, it is convenient for disassembly and assembly between each component, and increase screw blade and water flow phase separation
Effective area, and be capable of the axis stress of balance motor axis, make bearing that there is longer service life.
It is compared with the prior art, electronic kickboard provided by the utility model, using above-mentioned full immersed type underwater propeller, this
Sample can effectively improve the effective area that screw blade is contacted with water flow, can greatly improve speed of moving under water, and have longer
Service life.
Detailed description of the invention
Fig. 1 is the stereoscopic schematic diagram of full immersed type underwater propeller provided by the embodiment of the utility model；
Fig. 2 is the decomposition diagram one of full immersed type underwater propeller provided by the embodiment of the utility model；
Fig. 3 is the decomposition diagram two of full immersed type underwater propeller provided by the embodiment of the utility model；
Fig. 4 is the schematic cross-sectional view in the face A-A in Fig. 1.
Main element symbol description
100: full immersed type underwater propeller
10: propeller housing 11: installation base portion
11a: the first side 11b: second side
111: fitting groove 12: outer cylindrical portion
13: the first connecting column portions 131: crossed beam trunking
14: the second connecting column portion, 112: the second fixation hole
113: locating convex block
20: screw blade 21: propeller cylinder
22: 211: the first non-circular hole of blade
30: driving motor 31: stationary part
311: support shaft 312: stator base
313: iron core component 314: axis pilot hole
315: shaft through-hole 316: bearing
317: 318: the first fixation hole of locating flange
32: rotor portion 321: axis rotor endcap
322: rotor case 323: magnetic element
324: magnet holder
40: motor shaft 40a: first end
40b: second end 41: interconnecting piece
42: threaded portion
50: pod 51: third fixation hole
52: locating notch
60: blade nut 61: thread fiting part
70: 71: the second non-circular hole of gasket
Specific embodiment
In order to which technical problem to be solved in the utility model, technical solution and beneficial effect is more clearly understood, with
Lower combination accompanying drawings and embodiments, the present invention will be further described in detail.It should be appreciated that described embodiment is this
A part of the embodiment of utility model, instead of all the embodiments.Based on described the embodiments of the present invention, ability
Domain those of ordinary skill every other embodiment obtained under the premise of being not necessarily to creative work, belongs to the utility model
The range of protection.
In order to make those skilled in the art more fully understand the technical solution of the utility model, below with reference to specific attached drawing
The realization of the utility model is described in detail.
For sake of convenience, hereinafter so-called " preceding " " rear " " left side " " right side " "upper" "lower" and attached drawing itself it is forward and backward, left,
The right side, upper and lower direction are consistent, but do not play restriction effect to the structure of the utility model.
Unless otherwise defined, the technical term or scientific term used herein is should be in the utility model fields
The ordinary meaning that personage with general technical ability is understood.Make in the utility model patent application specification and claims
" first ", " second " and similar word are not offered as any sequence, quantity or importance, and are used only to distinguish
Different component parts.Equally, the similar word such as "one" or " one " does not indicate that quantity limits yet, but indicates exist at least
One.
It as shown in Figures 1 to 4, is a preferred embodiment provided by the utility model.
Full immersed type underwater propeller 100 provided in this embodiment, including propeller housing 10, screw blade 20, driving electricity
Machine 30, motor shaft 40 and pod 50, propeller housing 10 include an installation base portion 11, and installation base portion 11 has opposite the
Side 11a and second side 11b, screw blade 20 are located at the side of 11 first side 11a of the installation base portion；Driving motor 30 is for making
Screw blade 20 rotates, and driving motor 30 includes stationary part 31 and rotor portion 32, and stationary part 31 is fixed on the installation base
On second side 11b in portion 11；Motor shaft 40 has opposite first end 40a and second end 40b, the first end of motor shaft 40
The stationary part 31 of 40a and driving motor 30 is fixed, and second end 40b is extended to except driving motor 30 and connected with screw blade 20
It connects；Pod 50 is used to guide water flow to screw blade 20, the setting of pod 50 installation base portion 11 and screw blade 20 it
Between；It is provided with spline structure between motor shaft 40 and screw blade 20, is relatively rotated with both limitations.
Above-mentioned full immersed type underwater propeller 100, including propeller housing 10, screw blade 20, driving motor 30, motor
Axis 40 and pod 50, it is convenient for disassembly and assembly between each component, and increase the significant surface of screw blade 20 Yu water flow phase separation
Product, and it is capable of the axis stress of balance motor axis 40, make bearing that there is longer service life.
Referring to Fig. 1 to 4, the full immersed type underwater propeller 100 of the present embodiment, including propeller housing 10, screw blade 20,
Driving motor 30, motor shaft 40 and pod 50.
Referring to Fig. 1 to 4, propeller housing 10 includes installation base portion 11, and in the present embodiment, which includes
One substantially cylindrical outer cylindrical portion 12, outer cylindrical portion 12 are the hollow structure of both ends open, which is located at outer cylindrical portion
12 inside substantial middle position is installed and is formed with connecting column portion 13,14 between the outer wall of base portion 11 and the inner wall of outer cylindrical portion 12.
The quantity in connecting column portion is but is not limited to three, and three connecting column portions are equally spaced in the circumferential direction of installation base portion 11.Peace
Inside of dress base portion 11 by outer cylindrical portion 12 is divided into the driving chamber (left side of diagram) to communicate with each other and the power cavity (right side of diagram
Side), driving motor 30 is assemblied in the driving chamber, and pod 50, screw blade 20 are located in power cavity, so it is easy to understand that
It is supported in outer cylindrical portion 12 by connecting column portion by base portion 11 is installed, the flowing space of water is constituted between adjacent connecting column portion,
Screw blade 20 flows the water flow between driving chamber and power cavity, to make full immersed type by after the driving rotation of driving motor 30
Underwater propeller 100 moves about.
Specifically, installation base portion 11 has opposite the first side 11a (right side of diagram) and (left side for diagram second side 11b
Side), the surface second side 11b of the installation base portion 11 offers fitting groove 111, and three 13,14 points of connecting column portions are one first
Connecting column portion 13 and two the second connecting column portions 14, the first connecting column portion 13 have the crossed beam trunking 131 passed through for power supply source line,
One end of the crossed beam trunking 131 extends to the inner wall of fitting groove 111 and is connected to fitting groove 111.
Referring to Fig. 1 to 4, driving motor 30 is connected by motor shaft 40 with screw blade 20, so that 20 turns of screw blade
Dynamic, driving motor 30 includes stationary part 31 and rotor portion 32, and stationary part 31 is fixed on second side 11b.In this implementation
In example, driving motor 30 is to turn brushless waterproof machine outside, and using rear shaft-protruding type structure, (i.e. motor shaft 40 is by driving motor 30
The right end of diagram stretches out).Stationary part 31 includes wearing the hollow support shaft 311 and installation base portion that installation base portion 11 is arranged
11 fixed circular stator bases 312 and the iron core component 313 for coiling winding.The stator base 312 is mounted on dress
In slot allocation 111, stator base 312 has the axis pilot hole 314 passed through for support shaft 311, support shaft 311 and stator base 312
It is threadedly coupled and fixes, iron core component 313 is set in 311 outside of support shaft and is supported by the support shaft 311, and support shaft 311 has
The shaft through-hole 315 that power supply arbor 40 passes through, motor shaft 40 and support shaft 311 are provided with bearing 316.Rotor portion 32 turns including axis
Sub- end cap 321, cylindric rotor case 322, multiple magnetic elements 323, and magnetic element 323 is maintained at rotor
The magnet holder 324 of circular ring shape on shell 322.Axis rotor endcap 321 and the first end 40a of motor shaft 40 are fixed, outside rotor
Shell 322 is set on the periphery of stationary part 31, and the inside of rotor case 322 is arranged in multiple magnetic elements 323, and edge turns
Subshell 322 is provided at circumferentially spaced.It is understood that the installation process of stationary part 31 are as follows: by support shaft 311 and determine
Sub-base 312 be threadedly coupled it is fixed after, then iron core component 313 is sleeved on 311 outside of support shaft, then by stator base 312
It is packed into fitting groove 111, is connected and fixed stator base 312 and installation base portion 11 by screw.The installation of rotor portion 32
Journey are as follows: axis rotor endcap 321, rotor case 322, magnetic element 323 and magnet holder 324 are the entirety being connected and fixed to each other
Component can be used all existing fixed forms such as tight fit and be connected and fixed between axis rotor endcap 321 and motor shaft 40, will be electric
Arbor 40 is inserted into support shaft 311, and stretches out the second end 40b of support shaft 311 and after blade nut 60 locks, then rotor portion 32
It installs.
As further optimizing, it is convexly equipped on the outer wall of support shaft 311 to limit support shaft 311 and stator base
The locating flange 317 of 312 relative movements facilitates installation in such manner, it is possible to limit to support shaft 311 and stator base 312.
As further optimizing, obturator (not shown) is provided in driving motor 30, obturator covers stationary part
31, which is but is not limited to epoxy resin, and epoxy resin is coated on iron core component 313, the iron core is at least covered
Component 313, winding, to realize the waterproof effect of stationary part 31.
Referring to Fig. 1 to 4, pod 50, for guiding water flow to screw blade 20, the setting of pod 50 is in installation base portion
Between 11 and screw blade 20, in the present embodiment, the hemispherical shape of pod 50,50 self installation base portion 11 of pod is to spiral
The direction radius of blade 20 is tapered.Pod 50, installation base portion 11, stator base 312 are linked in sequence by screw and are fixed, stator
Multiple first fixation holes 318 are offered on pedestal 312, multiple first fixation holes 318 are wound around the periphery of axis pilot hole 314；It pushes away
Multiple second fixation holes 112 corresponding with the first fixation hole 318, pod are offered on into the installation base portion 11 of device shell 10
Multiple third fixation holes 51 corresponding with the second fixation hole 112 are offered on 50.It is easily understood that will using screw
Pod 50, stator base 312 are fixed on installation base portion 11, so that stationary part 31 be fixed, unscrew screw
Pod 50 and stationary part 31 are separated, installation and removal are convenient.In addition, the surface of pod 50 is smooth arcwall face,
In order to guide water flow in the flowing on its surface, water flow can be made to be transitted smoothly on screw blade 20, in such manner, it is possible to effectively
Increase the effective area of the draining of screw blade 20, improves fltting speed.
As further optimizing, the edge of pod 50 is formed with locating notch 52, the first side of the installation base portion 11
The surface 11a is formed with locating convex block 113 corresponding with locating notch 52, in this way, facilitating the installation of pod 50.
Referring to Fig. 1 to 4, screw blade 20, positioned at the side of installation 11 first side 11a of base portion comprising propeller cylinder 21
With multiple blades 22, the alternate periphery for being surrounded on propeller cylinder 21 of multiple blades 22.In the present embodiment, each blade 22 from
Inner end (left end of diagram) to outer end (right end of diagram) spiral setting of propeller cylinder 21, one end of pod 50
The outer diameter of radius and motor is essentially identical, and the outer diameter of the radius and propeller cylinder 21 of the other end is essentially identical.
Referring to Fig. 1 to 4, motor shaft 40, with opposite first end 40a and second end 40b, first end 40a and driving
The stationary part 31 of motor 30 is fixed, and second end 40b is extended to except driving motor 30 and connect with screw blade 20, motor shaft
It is provided with spline structure between 40 and screw blade 20, is relatively rotated with both limitations.In the present embodiment, spline structure includes
The first non-circular hole 211 for being opened on the propeller cylinder 21 of screw blade 20 and it is arranged on motor shaft 40 and with first
The interconnecting piece 41 that the shape of non-circular hole 211 matches；Screw blade 20 is fixed on motor shaft 40 by blade nut 60, even
It is formed with threaded portion 42 on the outer wall of socket part 41, the spiral shell being threadedly engaged with threaded portion 42 is formed on the inner wall of blade nut 60
Line auxiliary section 61.In this way, screw blade 20 is then connected and fixed with motor shaft 40 after blade nut 60 is tightened, work as blade nut
60 remove and can split out 30 rotor portion 32 of driving motor, can easily dismantle especially after being mixed into silt clear
It washes, maintenance easy to clean.
Specifically, the preferred 109mm of the length of motor shaft 40, the preferred 23mm of the length of interconnecting piece 41, this is first non-circular
It hole 211 can be in " D " shape, kidney-shaped etc., to realize the design mesh to relatively rotate for preventing screw blade 20 and motor shaft 40
's.It is noted that motor shaft 40 is connected and fixed by its first end 40a and the axis rotor endcap 321 of rotor portion 32,
Second end 40b is passed through except driving motor 30 through the support shaft 311 of stationary part 31, and screw blade 20 is maintained at the second end
The end of 40b, that is to say, being to lengthen the shaft end that goes out of driving motor 30, the both ends of motor shaft 40 are being separately connected rotor portion
32 and screw blade after, can active balance motor shaft 40 both ends axially loaded, that is, balance the axial load of bearing, increase
Long bearing uses the time.
Referring to Fig. 1 to 4, in the present embodiment, gasket 70 is arranged on interconnecting piece 41, gasket 70 has and interconnecting piece 41
The second non-circular hole 71 that shape matches, gasket 70 screw blade 20 is set with one end phase for being connected with blade nut 60
Pair the other end on.The presence of gasket 70 can prevent the direct friction of propeller Yu driving motor 30, while providing limit and making
With design in this way can make have a suitable gap between propeller and driving motor 30, while again will not be because of blade nut
60 lock and squeeze driving motor 30.
Electronic kickboard provided in this embodiment comprising above-mentioned full immersed type underwater propeller 100, in such manner, it is possible to effectively
The effective area that screw blade 20 is contacted with water flow is improved, speed of moving under water can be greatly improved, and there is longer service life.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modification, equivalent replacement or improvement etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (10)
1. a kind of full immersed type underwater propeller characterized by comprising
Propeller housing comprising an installation base portion, the installation base portion have the first opposite side and second side；
Screw blade, positioned at the side of first side；
Driving motor, for rotating the screw blade, the driving motor includes stationary part and rotor portion, described fixed
Subdivision is fixed in described second side；
Motor shaft, with opposite first end and second end, the first end and the stationary part of the driving motor are fixed,
The second end is extended to except the driving motor and is connect with the screw blade；And
Pod, for guiding water flow to the screw blade, the pod is arranged in the installation base portion and the spiral shell
It revolves between blade；
It is provided with spline structure between the motor shaft and the screw blade, is relatively rotated with both limitations.
2. full immersed type underwater propeller according to claim 1, which is characterized in that the stationary part is described including wearing
The hollow support shaft of base portion setting is installed, the circular stator base and be used for coiling winding that base portion is fixed are installed with described
Iron core component；The stator base has the axis pilot hole passed through for the support shaft, the support shaft and the stator base
Seat, which is threadedly coupled, to be fixed；The iron core component is set on the outside of the support shaft, and the support shaft has wears for the motor shaft
The shaft through-hole crossed, the motor shaft and the support shaft are provided with bearing；The rotor portion includes rotor endcap, cylindrical shape
Rotor case, multiple magnetic elements, and the magnetic of the circular ring shape to be maintained at the magnetic element on the rotor case
Retort stand；The rotor endcap and the first end of the motor shaft are fixed, and the rotor case is set in the stationary part
On periphery, the inside of the rotor case, and being provided at circumferentially spaced along rotor case is arranged in multiple magnetic elements.
3. full immersed type underwater propeller according to claim 2, which is characterized in that be convexly equipped on the outer wall of the support shaft
To limit the locating flange of the support shaft and stator base relative movement.
4. full immersed type underwater propeller according to claim 2, which is characterized in that offered in the stator base multiple
First fixation hole, multiple first fixation holes are wound around the periphery of the axis pilot hole；The installation base of the propeller housing
Multiple second fixation holes corresponding with first fixation hole are offered in portion, are offered on the pod and are consolidated with described second
Determine the corresponding multiple third fixation holes in hole.
5. full immersed type underwater propeller according to claim 1, which is characterized in that the spline structure includes being opened in institute
It states the first non-circular hole on screw blade and the shape phase on the motor shaft and with first non-circular hole is set
Matched interconnecting piece；The screw blade is fixed on the motor shaft by blade nut, shape on the outer wall of the interconnecting piece
At there is threaded portion, the thread fiting part with threaded portion cooperation is formed on the inner wall of the blade nut.
6. full immersed type underwater propeller according to claim 5, which is characterized in that it is arranged with gasket on the interconnecting piece,
The gasket has the second non-circular hole to match with the shape of the interconnecting piece, and the gasket is arranged in the screw blade
The other end opposite with the one end for being connected with the blade nut on.
7. full immersed type underwater propeller according to claim 1, which is characterized in that the hemispherical shape of pod, institute
It is tapered to the direction radius of the screw blade from the installation base portion to state pod.
8. full immersed type underwater propeller according to claim 1, which is characterized in that the screw blade includes propeller cylinder
With multiple blades, the alternate periphery for being surrounded on the propeller cylinder of multiple blades.
9. full immersed type underwater propeller according to claim 1, which is characterized in that be provided with filling in the driving motor
Body, the obturator cover the stationary part.
10. a kind of electronic kickboard, which is characterized in that including the described in any item full immersed type underwater propellers of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920198448.7U CN209634706U (en) | 2019-02-14 | 2019-02-14 | Full immersed type underwater propeller and electronic kickboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920198448.7U CN209634706U (en) | 2019-02-14 | 2019-02-14 | Full immersed type underwater propeller and electronic kickboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209634706U true CN209634706U (en) | 2019-11-15 |
Family
ID=68493668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920198448.7U Expired - Fee Related CN209634706U (en) | 2019-02-14 | 2019-02-14 | Full immersed type underwater propeller and electronic kickboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209634706U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111699611A (en) * | 2019-02-14 | 2020-09-22 | 苏州微孚智能科技有限公司 | Full-immersion type underwater propeller and electric floating plate |
-
2019
- 2019-02-14 CN CN201920198448.7U patent/CN209634706U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111699611A (en) * | 2019-02-14 | 2020-09-22 | 苏州微孚智能科技有限公司 | Full-immersion type underwater propeller and electric floating plate |
| CN111699611B (en) * | 2019-02-14 | 2023-03-14 | 苏州微孚智能科技有限公司 | Full-immersion type underwater propeller and electric floating plate |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191115 Termination date: 20220214 |