CN206530657U - A kind of transmission device and internal speed changer based on planetary gear train - Google Patents
A kind of transmission device and internal speed changer based on planetary gear train Download PDFInfo
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- CN206530657U CN206530657U CN201720007104.4U CN201720007104U CN206530657U CN 206530657 U CN206530657 U CN 206530657U CN 201720007104 U CN201720007104 U CN 201720007104U CN 206530657 U CN206530657 U CN 206530657U
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- planetary gear
- clutch
- gear train
- speed changer
- planet carrier
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 78
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- 230000007246 mechanism Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
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- 210000005056 cell body Anatomy 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
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- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009837 dry grinding Methods 0.000 description 1
- IXSZQYVWNJNRAL-UHFFFAOYSA-N etoxazole Chemical compound CCOC1=CC(C(C)(C)C)=CC=C1C1N=C(C=2C(=CC=CC=2F)F)OC1 IXSZQYVWNJNRAL-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a kind of transmission device based on planetary gear train and its internal speed changer of application, the transmission device will be connected between the first rotary part and power input of planetary gear train by clutch, second rotary part of planetary gear train is connected by overdrive clutch component with the first power output member, the power input module is connected by overdrive clutch component with the second rotary part simultaneously, pass through the cooperation of clutch and overdrive clutch component, realize that the transmission direction of planetary gear train is exchanged between the first rotary part and the second rotary part, make full use of same planetary gear train can realize all gearratios, improve the transmission efficiency of internal speed changer, reduce the structure of internal speed changer, size and weight, it is advantageously implemented the popularization and application of planetary gear train internal speed changer.
Description
Technical field
The utility model belongs to planetary gear train drive technology, and in particular to a kind of transmission device based on planetary gear train and interior
Speed changer and shifting control method.
Background technology
The existing applicable speed of internal speed variator of bicycle is more single than switching mode, typically using multistage multiple element planet
Train is connected, and the locking and unblock taken turns by control centre realize the switching of different drive ratios, the biography of adjacent planetary gear train
Connected between moving part by one-way clutch, be merely able to realize unidirectional power transmission, so cause the structure of internal speed changer compared with
Complexity, volume is big, is unfavorable for the popularization and application of internal speed changer.
According to the drive characteristic of planetary gear train, in the transmission device as speed changer, the direction of transfer of power is specific
, if inputted the planet carrier of planetary gear train as power, using ring gear as power output, vice versa, so
If fixed conveyor pattern result in speed changer and to increase gear, correspondingly need increase multistage planet train to be gone here and there
Connection.After it is really exchanged the planet carrier of same planetary gear train to the power transmission direction between ring gear, its speed is than same
Sample can be changed, but the power transmission side of planetary gear train planet carrier and ring gear can be realized currently without a kind of technology
Commutation drive speed-adjusting is realized between.
Utility model content
The utility model solve technical problem be：For transmission device of the existing application planetary gear train as transmission mechanism
There is provided a kind of new transmission device and internal speed changer and speed Control based on planetary gear train for the baroque defect existed
Method.
The utility model adopts the following technical scheme that realization：
Transmission device based on planetary gear train, including power input, clutch, overdrive clutch component and planetary gear
System, the first power output member；The centre wheel of the power input and planetary gear train is coaxially disposed, and the first of the planetary gear train
Connected between rotary part and power input by clutch, the second rotary part of the planetary gear train passes through overdrive clutch
Component is connected with the first power output member, and the power input module is connected by overdrive clutch component and the second rotary part simultaneously
Connect；The overdrive clutch component includes the first single-direction transmission part, retainer and some rolling elements, the retainer rolling assembling
In on the second rotary part, the power input is connected by the first single-direction transmission part with retainer, the rolling element with
The arrangement of overdrive clutch structure is uniformly arranged between the second rotary part and the first power output member, the rolling element
Between the second rotary part it is raised provided with transmission, the circumferential of the retainer is provided with some maintainance blocks, by rolling element
It is separated between transmission projection.
It is preferred that, the rolling element is cylinder or ball.
Further, rolling assembling between the power input and planet carrier, the clutch slip is assemblied in power
Between input component and planet carrier, the clutch is circumferentially inlaid in power input, and clutch is provided with some clutch projections,
Corresponding planet carrier circumferential position is provided with the clutch groove of chimeric clutch projection.
As preferred scheme of the present utility model, the planet carrier is connected with the second power output member direct-drive.
As another preferred scheme, the planet carrier is connected by the second single-direction transmission part with the first power output member.
The invention also discloses a kind of internal speed changer, using the transmission based on planetary gear train in appeal preferred scheme
Device, wherein, the power input is the free wheel base of internal speed changer, and first power output member is internal speed changer flower-drum,
The clutch, overdrive clutch component and planetary gear train are assemblied on the axletree of internal speed changer and internal speed changer housing.
It is preferred that, the first single-direction transmission part and the second single-direction transmission part use freewheel clutch.
The invention also discloses the shifting control method using above-mentioned internal speed changer, including following two speed change moulds
Formula：
Pattern one, by controlling clutch to separate the planet carrier of free wheel base and planetary gear train, power is from free wheel base along super
More clutch component is transferred to ring gear, and power is transferred into internal speed changer flower-drum from planet carrier by planetary gear train exports；
Pattern two, by controlling clutch to combine the planet carrier of free wheel base and planetary gear train, power is transmitted from free wheel base
To planet carrier, power is transferred to by ring gear by planetary gear train, then exported from internal speed changer flower-drum by overdrive clutch component.
Further in two kinds of speed change patterns described above, it can be realized by the locking and unblock for controlling multi-joint centre wheel
The realization of multi-change speed gear.
The beneficial effects of the utility model：
(1) the utility model is simple in construction, and ring gear can not only be used for input component, can also be used as output；
(2) multi-shifting speed variator for the prior art that compares, the utility model can reduce planet gear transmission series, improve transmission
Efficiency；
(3) the utility model utilizes the gearratio of same planetary gear train to greatest extent, can reduce the volume and width of speed changer
Size is spent, while reducing gearbox weight；
(4) use overdrive clutch component of the present utility model, transmission is more steady, faster, and friction very little, when flower-drum exceeds the speed limit with
Inner body is separated without friction, is ridden and is more moistened.
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Brief description of the drawings
Fig. 1 is the internal speed variator of bicycle in embodiment one using the transmission device of the present utility model based on planetary gear train
Structural representation.
Fig. 2 is the free wheel base schematic diagram in embodiment one.
Fig. 3 is the planet carrier schematic diagram in embodiment one.
Fig. 4 is the clutch axis action schematic diagram between the free wheel base and planet carrier in embodiment one.
Fig. 5 is the clutch assembling schematic diagram between the free wheel base and planet carrier in embodiment one.
Fig. 6 is the retainer schematic diagram in embodiment one.
Fig. 7 is the ring gear schematic diagram in embodiment one.
Fig. 8 is two kinds of gear route schematic diagrames of internal speed variator of bicycle in embodiment one.
Overdrive clutch component integrality figures of the Fig. 9 for the internal speed changer in embodiment one in speed change pattern one.
Overdrive clutch component partial schematic diagrams of the Figure 10 for the internal speed changer in embodiment one in speed change pattern one
Overdrive clutch component integrality figures of the Figure 11 for the internal speed changer in embodiment one in speed change pattern two.
Overdrive clutch component partial schematic diagrams of the Figure 12 for the internal speed changer in embodiment one in speed change pattern two.
Figure 13 is the retainer schematic diagram in embodiment two.
Figure 14 is the internal speed changer assembling schematic diagram in embodiment two, the specific assembling mode for representing overdrive clutch component.
Figure 15 is the ring gear schematic diagram in embodiment three.
Figure 16 is the internal speed changer assembling schematic diagram in embodiment three, the specific assembling mode for representing overdrive clutch component.
Label in figure：
1- free wheel bases, 101- clutch mounting grooves, 102- the first single-direction transmission part mounting surfaces,
2- overdrive clutch components, 21- retainers, 211- maintainance blocks, 22- the first single-direction transmission parts, 23- rolling elements,
3- clutches, 301- clutch projections,
4- planetary gear trains, 41- ring gears, 411- transmissions are raised, and 412- wedge shape spaces, 42- planet carriers, 421- clutches are recessed
Groove, 43- planetary gears, 44- centre wheels,
51- flower-drum, the power output members of 52- second, 53- the second single-direction transmission parts,
6- axletrees.
Embodiment
Embodiment one
Referring to Fig. 1, it is illustrated that in internal speed changer be application the transmission device of the present utility model based on planetary gear train it is excellent
Embodiment is selected, free wheel base 1, overdrive clutch component 2, clutch 3, planetary gear train 4, flower-drum 51 and axletree 6 is specifically included.
With reference to Fig. 2, free wheel base 1 is connected as the power input of internal speed changer and the power flywheel of bicycle, rotates peace
On axletree 6, flower-drum 51 as internal speed changer power output member, respectively with being used as the rotary part of planetary gear train 4 first
Ring gear 41, the planet carrier 42 of the second rotary part are connected, and the He of setting clutch mounting groove 101 is respectively equipped with free wheel base 1
By assembling clutch 3 and planetary gear train 4 on first single-direction transmission part mounting surface 102, the clutch mounting groove 101 of free wheel base 1
Planet carrier 42 connect, planet carrier 42 is connected by the second single-direction transmission part 53 with flower-drum 51, and ring gear 41 passes through overdrive clutch
Component 2 is connected with flower-drum 51, while the first single-direction transmission part mounting surface 102 on free wheel base 1 is by assembling the first single-direction transmission
Part 22 is connected with overdrive clutch component 2.
With reference to Fig. 3 to Fig. 5, planet carrier 42 is used to install planetary gear 43, while power is realized in the revolution by planetary gear 43
Output.One end of planet carrier 42 in the present embodiment is directly matched somebody with somebody with one end part empty set rotating dress of free wheel base 1, and clutch 3 is used
Circular ring type member slide is sleeved on axletree, provided with some groups of clutch projections 301, clutch projection 301 in the circumference of clutch 3
It is inlaid in the clutch mounting groove 101 of free wheel base 1, clutch mounting groove 101 is along free wheel base 1 and the end of the empty set of planet carrier 42
Axially arranged, clutch 3 can be along the axial slip of clutch mounting groove 101, and planet carrier 42 end of the empty set on free wheel base 1 is along week
To the clutch groove 421 provided with some correspondence clutch projections 301, clutch 3 realizes embedded or disengaging clutch by axial slip
Groove 421, realizes the separation and engagement between free wheel base 1 and planet carrier 42.
For reduce clutch 3 clutch projection 301 insertion planet carrier 42 on clutch groove 421 rigid impact, from
The side for closing the non-drive direction of groove 421 sets wedge surface, facilitates the transition of clutch projection 301 to be embedded in and exit.
Clutch 3 can realize axial slip by the gearshift controlling organization inside internal speed changer, and those skilled in the art can
A variety of conventional axial slip clutch shifting mechanisms are selected by actual design requirement, the present embodiment will not be described here.
With reference to Fig. 1, Fig. 6 and Fig. 7, if overdrive clutch component 2 includes retainer 21, the first single-direction transmission part 22 and dry milling
Dynamic element 23, retainer 21 is barrel components, and rolling assembling is on ring gear 41, while retainer 21 passes through the first single-direction transmission
Part 22 is assembled with the first single-direction transmission part mounting surface 102 on free wheel base 1.Some rolling elements 23 are with the cloth of overdrive clutch structure
The mode of putting is uniformly arranged between ring gear 41 and the inwall of flower-drum 51, provided with transmission on the ring gear 41 between rolling element 23
Projection 411, the end face circumference of retainer 21, which is provided between some maintainance blocks 211, maintainance block 211, sequentially forms two kinds of cell bodies,
Rolling element 23 after assembling is formed spacing holding by one of which cell body, and another cell body will then be driven raised 411 correspondence, and make
Obtain and be separated between rolling element 23 and transmission projection 411 by maintainance block 211.
On the overdrive clutch structure arrangement of rolling element 23, the rolling element setting side of freewheel clutch is referred to
Formula.Specifically in the present embodiment, set some low by inclined-plane on the periphery that ring gear 41 is connected with the inwall empty set of flower-drum 51
Position groove, rolling element 23 is assemblied in Lower tank, when the rotating speed of ring gear 41 is more than the rotating speed of flower-drum 51, the meeting of rolling element 23
The wedge shape space 412 (as shown in figure 12) with flower-drum inwall is pushed into upwards in the presence of inclined-plane, until by ring gear 41 with spending
The inwall clamping of drum 51, forms reliable power transmission connection, drives flower-drum 51 to rotate by ring gear 41, if the rotating speed of flower-drum 51
More than the power transmission separation failure of ring gear 41, then flower-drum 51 and rolling element 23.
With reference to shown in Fig. 8, the retainer 21 being connected with the single-direction transmission of free wheel base 1 is raised by maintainance block 211 and transmission
Power, can be transferred on ring gear 41, the clutch 3 between free wheel base 1 and planet carrier 42 is separated, and is now moved by 411 contacts
Power, from the incoming planetary gear train of ring gear 41, is exported power of the power into flower-drum 51, i.e. Fig. 8 from planet carrier 42 and passed by free wheel base 1
Pass route A；If being engaged between free wheel base 1 and planet carrier 42 by clutch 3, now power is passed by free wheel base 1 from planet carrier 42
Enter planetary gear train, when fixed one of centre wheel, due to the change of gearratio, the rotating speed of ring gear 41 exceedes connection flywheel
The retainer 21 of seat 1, the formation overdrive clutch of rolling element 23, ring gear 41 is connected by the formation power transmission of rolling element 23,
Flower-drum 51 is transmitted power to by ring gear 41 to export, i.e. power transmission line B in Fig. 8, now ring gear 41 equally drives and protected
The rotation at the same speed of block 211 is held, retainer 21 surmounts free wheel base 1 by the first single-direction transmission part 22.When centre wheel is not fixed, it is in
During free state, now power exports power to flower-drum 51 by free wheel base 1 from planet carrier 42, is now direct gear.
Maintainance block 211 and rolling element 23 and transmission projection the distance between 411 are set, it shall be guaranteed that rolling element 23
Overdrive clutch action can be completed in wedge shape space normally between ring gear 41 and flower-drum 51.When clutch and planet carrier
During separation, it is ensured that when maintainance block 211 is contacted with transmission projection 411, rolling element 23 is pushed into ring gear low level by maintainance block 211
Groove, is kept completely separate with flower-drum inner ring；When clutch is engaged with planet carrier, actuated element 23 is pushed into and flower-drum by ring gear inclined-plane
When inner ring is connected, retain certain space between maintainance block 211 and transmission projection.
Rolling element 23 can use column or ball part.
The first signified single-direction transmission part 22 and the second single-direction transmission part 53 are cylinder as rolling in the present embodiment
The mono-directional overrun clutch of body, but can also possess the driving member of mono-directional overrun function using other.
In the internal speed changer application of the present embodiment, ring gear 41 and planet carrier 42 are connected with flower-drum 51 respectively, wherein interior
Gear ring 41 is connected by overdrive clutch component 2 with flower-drum 51, and planet carrier 42 is connected by the second single-direction transmission part 53 with flower-drum 51,
The inwall of flower-drum 51 can be set bushing and is connected respectively with ring gear 41 and planet carrier 42.In addition, as based on planetary gear train
In transmission device, ring gear 41 is connected with flower-drum 51 (the first power output member), and planet carrier 42 can also be with the second power output member
52 direct-drives are connected, and realize the transfer output of transmission device.Applying transmission device of the utility model based on planetary gear train
, can be according to the difference of actual design, by the rotary transmission part of planetary gear train (mainly planet carrier when in other gearings
And ring gear) exchanged with the connected mode of power input.
Below in conjunction with Fig. 4, Fig. 8 and Fig. 9-12, the shifting control method of the internal speed-changing of the present embodiment is carried out specifically
It is bright.
The internal speed changer of the present embodiment is divided into planet carrier output (A) and ring gear output (B) according to the connection with output
Both of which.
In mode A, the clutch 3 in Fig. 4 is moved axially to the right by clutch control mechanism (not shown),
It will be separated between free wheel base 1 and planet carrier 42, now the power of free wheel base 1 is transferred to retainer by the first single-direction transmission part 22
21, the drive block 411 on ring gear 41 is promoted by maintainance block 211, ring gear 41 is transmitted power to, now maintainance block 211 will
Actuated element 23 is pushed into ring gear Lower tank, is separated with flower-drum inner ring, and ring gear can not be transmitted power by actuated element 23
To flower-drum, power enters planetary gear train from ring gear 41, by being exported after transmission from planet carrier 42, and planet carrier 42 is single by second
Flower-drum 51 is transmitted power to driving member 53, as shown in Figure 9 and Figure 10.
In B-mode, the clutch 3 in Fig. 4 is moved axially to the left by clutch control mechanism (not shown),
It will be engaged between free wheel base 1 and planet carrier 42, when centre wheel is not fixed, during in free state, now power is by free wheel base 1
Power is exported to flower-drum 51 from planet carrier 42, is now direct gear；When fixed one of centre wheel, power is by free wheel base 1
Inputted from planet carrier 42, by being exported after transmission from ring gear 41, the rotating speed of ring gear 41 exceedes the rotating speed of planet carrier, now interior
Rolling element enters wedge shape space 412 between gear ring 41 and flower-drum 51, and connection will be held out against between ring gear 41 and flower-drum 51, realizes dynamic
Power is exported from flower-drum 51, and the rotating speed of flower-drum 51 surmounts planet carrier 42, and the second single-direction transmission part 53 fails.
Planetary gear 43 in planetary gear train 4 and centre wheel 44 in the present embodiment can use nest, pass through two
Gear ratio adjustment above, realizes the speed change gear superposition in mode A and B-mode.Particularly with regard to nest planetary gear train
Centre wheel switching control be gear shift technology that internal speed changer is commonly used, the present embodiment do not repeated it.
Embodiment 2
Referring to Figure 13 and Figure 14, the clutch in the present embodiment surmounts the institute of maintainance block 211 set on the retainer 21 of component
Circular path be arranged on the excircle of retainer 21, while the inner ring of retainer 21 directly passes through the first single-direction transmission part
22 are connected with free wheel base 1, and the circular path and the first single-direction transmission part 22 where maintainance block 211 are located on same axial location,
The cross section of retainer 21 is spill, and ring gear 41 is used shown in the Fig. 7 of embodiment one, the spill circumferential groove and internal tooth of retainer 21
Enclose 41 ends and chimeric assembling is rotated by rolling element.It is such that the axial length for reducing retainer 21 is set, be conducive to subtracting
The internal speed changer length dimension of its small application.
Embodiment 3
Referring to Figure 15 and Figure 16, the clutch in the present embodiment surmounts the transmission projection 411 set on the ring gear 42 of component
The circular path at place is arranged on the internal tooth excircle of ring gear, and retainer 21 uses the structure shown in the Fig. 6 of embodiment one,
Overdrive clutch component directly can be arranged on the region that ring gear is engaged with planetary gear, be conducive to reducing the internal speed changer of its application
Length dimension.
Content involved by the utility model is not limited to above-described embodiment, is limited not departing from appended claims
The utility model spirit and scope in, in various applications of other occasions to made by the utility model, belong to this practicality
New protection domain.Meanwhile, any those skilled in the art are not departing from technical solutions of the utility model situation
Under, many possible variations and modification, or modification are all made to the utility model scheme using the technology contents of the disclosure above
For the equivalent embodiment of equivalent variations.Therefore, every content without departing from technical solutions of the utility model, according to the utility model
Technical spirit all should fall in the utility model technology to any simple modifications, equivalents, and modifications made for any of the above embodiments
In the range of scheme protection.
Claims (7)
1. a kind of transmission device based on planetary gear train, it is characterised in that：Including power input, clutch, overdrive clutch group
Part and planetary gear train, the first power output member；
The sun gear of the power input and planetary gear train is coaxially disposed, the first rotary part and power of the planetary gear train
Connected between input component by clutch, the second rotary part of the planetary gear train passes through overdrive clutch component and the first power
Output is connected, and the power input is connected by overdrive clutch component with the second rotary part simultaneously；
The overdrive clutch component includes the first single-direction transmission part, retainer and some rolling elements, and the retainer rotates dress
Assigned on the second rotary part, the power input is connected by the first single-direction transmission part with retainer, the rolling element
It is uniformly arranged on the arrangement of overdrive clutch structure between the second rotary part and the first power output member, it is described to roll member
The second rotary part between part is raised provided with transmission, and the circumferential of the retainer is provided with some maintainance blocks, will roll member
It is separated between part and transmission are raised.
2. a kind of transmission device based on planetary gear train according to claim 1, the power input and planet carrier it
Between rolling assembling, the clutch slip is assemblied between power input and planet carrier, and the clutch is circumferentially inlaid in dynamic
On power input component, clutch is provided with some clutch projections, corresponding planet carrier circumferential position be provided with chimeric clutch projection from
Close groove.
3. a kind of transmission device based on planetary gear train according to claim 1, the rolling element is cylinder or ball.
4. a kind of transmission device based on planetary gear train according to any one of claim 1-3, the planet carrier and
Two power output members are connected.
5. a kind of transmission device based on planetary gear train according to any one of claim 1-3, the planet carrier passes through
Second single-direction transmission part is connected with the first power output member.
6. a kind of internal speed changer, it is characterised in that：Using the transmission device based on planetary gear train in claim 5, wherein, institute
State the free wheel base that power input is internal speed changer, first power output member is internal speed changer flower-drum, it is the clutch, super
More clutch component and planetary gear train are assemblied on the axletree of internal speed changer and internal speed changer housing, and first rotary part is
The planet carrier of planetary gear train, the second rotary part is the ring gear of planetary gear train.
Surmount 7. internal speed changer according to claim 6, the first single-direction transmission part and the second single-direction transmission part are used
Clutch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720007104.4U CN206530657U (en) | 2017-01-04 | 2017-01-04 | A kind of transmission device and internal speed changer based on planetary gear train |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720007104.4U CN206530657U (en) | 2017-01-04 | 2017-01-04 | A kind of transmission device and internal speed changer based on planetary gear train |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206530657U true CN206530657U (en) | 2017-09-29 |
Family
ID=59917595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720007104.4U Withdrawn - After Issue CN206530657U (en) | 2017-01-04 | 2017-01-04 | A kind of transmission device and internal speed changer based on planetary gear train |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206530657U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108266503A (en) * | 2017-01-04 | 2018-07-10 | 李激初 | Transmission device and internal speed changer and shifting control method based on planetary gear train |
-
2017
- 2017-01-04 CN CN201720007104.4U patent/CN206530657U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108266503A (en) * | 2017-01-04 | 2018-07-10 | 李激初 | Transmission device and internal speed changer and shifting control method based on planetary gear train |
| CN108266503B (en) * | 2017-01-04 | 2023-11-24 | 广东洛梵狄智能科技有限公司 | Transmission device based on planetary gear train, internal transmission and speed change control method |
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Effective date of registration: 20201103 Address after: Room 301, third floor, building 72, Lihe science and technology industry center accelerator project, No. 33, information Avenue South, Shishan town, Nanhai District, Foshan City, Guangdong Province 528000 Patentee after: GUANGDONG LOFANDI INTELLIGENT TECHNOLOGY Co.,Ltd. Address before: 410016 Hunan province Changsha Yuhua District, Jinxia district city Kang Xin Yuan building 1205 room 2 Patentee before: Li Jichu |
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Granted publication date: 20170929 Effective date of abandoning: 20231124 |
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Granted publication date: 20170929 Effective date of abandoning: 20231124 |