CN209363537U - A kind of forging manipulator - Google Patents
A kind of forging manipulator Download PDFInfo
- Publication number
- CN209363537U CN209363537U CN201821973281.9U CN201821973281U CN209363537U CN 209363537 U CN209363537 U CN 209363537U CN 201821973281 U CN201821973281 U CN 201821973281U CN 209363537 U CN209363537 U CN 209363537U
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- CN
- China
- Prior art keywords
- gear
- drive shaft
- movable sleeve
- pedestal
- loose collar
- Prior art date
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Abstract
The utility model relates to a kind of forging manipulators, including body, sliding seat is provided on the downside of body, sliding seat is rotatably connected to pedestal, one end of pedestal is rotatably connected to transmission shaft and its other end is rotatably connected to unpowered axis, driven gear is fixedly connected on transmission shaft, transmission shaft is provided with the drive shaft for being rotationally connected with pedestal close to the side of sliding seat, the bottom surface of sliding seat is fixedly connected with cone ring gear, connecting shaft is also rotatably connected on pedestal, one end of connecting shaft is installed with first bevel gear and the other end is installed with second bevel gear, sliding is connected with movable sleeve in drive shaft, driving gear and third hand tap gear are installed on movable sleeve, the side of drive shaft, which is additionally provided with, can push movable sleeve is mobile to make to drive that gear is engaged in driven gear or third hand tap gear is engaged in the regulating mechanism of second bevel gear, one end of drive shaft is also It is provided with driving mechanism.The utility model has the effect of the space hold volume that can reduce forging manipulator.
Description
Technical field
The utility model relates to the technical fields of forging equipment, more particularly, to a kind of forging manipulator.
Background technique
Forging manipulator refers to that one of forging assists mechanized equipment.It is used to clamp steel ingot or blank when open die forging
One, so that steel ingot or blank overturn, be sent into and move up and down, to replace manual operation.It is divided to two kinds of rail, trackless.Can in order to avoid
Except heavy manual labor and greatly improve forging and stamping machine productivity.The forging manipulator of modernization can and hydraulic forging press
Linkage is realized by computer control and is automatically brought into operation.
It is existing to can refer to Authorization Notice No. are as follows: the Chinese utility model patent of CN201357203Y, it discloses a kind of forgings
The driving device of manufacturing operation machine, for driving forging manipulator.The utility model drives operation machine using long stroke hydraulic cylinder；
Described long stroke hydraulic cylinder includes cylinder body and piston；Two groups are shared, is respectively arranged above the ground rail of operation machine walking,
The piston head of long stroke hydraulic cylinder is fixed by support and ground rail；Cylinder body and the fuselage for operating machine are mutually fixed, in cylinder body and
The operation machine first line of a couplet is connected to wheel；It is walked by the reciprocating motion band motor car wheel of long stroke hydraulic cylinder, while driving the folder on operation machine
Tool makees opening and closing movement；Described long stroke hydraulic cylinder couples oil pump, with the movement of the vari- able flow control long stroke hydraulic cylinder of oil pump
Speed.The utility model also eliminates gear reduction unit, walking sprocket wheel and Ground chain rail because being not required to hydraulic motor or motor
Road, and braking, the buffer gear of control hydraulic motor, keep structure greatly simplified, reduce cost；And the feeding of forging manipulator
Quickly, accurately, reliable performance.
Prior art among the above has the following deficiencies: the driving of the forging manipulator in by adopting the above technical scheme
Device since cylinder is longer, thus causes overall volume larger come the forging manipulator driven, thus is configured in workshop
When, whole occupied space is also larger, in some lesser factories in use, more inconvenient when using.
Utility model content
The purpose of the utility model is to provide a kind of forging manipulators, have the space hold that can reduce forging manipulator
Volume, just with the use of smaller workshop.
The foregoing invention purpose of the utility model has the technical scheme that
A kind of forging manipulator, including body are provided with sliding seat on the downside of body, are rotatably connected to bottom on the downside of sliding seat
Seat, one end of pedestal is rotatably connected to transmission shaft and its other end is rotatably connected to unpowered axis, transmission shaft and unpowered axis two
End has been respectively fixedly connected with driving wheel, and driven gear is fixedly connected on transmission shaft, and transmission shaft is arranged close to the side of sliding seat
There is the drive shaft for being rotationally connected with pedestal, the bottom surface of sliding seat is fixedly connected with cone ring gear, is also rotatably connected to axis on pedestal
Perpendicular to the connecting shaft of drive shaft axis, one end of connecting shaft is installed with the first bevel gear and connecting shaft for being engaged in cone ring gear
The other end is installed with second bevel gear, and sliding is connected with movable sleeve in drive shaft, and driving gear and the are installed on movable sleeve
Third hand tap gear, the side of drive shaft, which is additionally provided with, can push movable sleeve is mobile to make that gear is driven to be engaged in driven gear or third
Bevel gear is engaged in the regulating mechanism of second bevel gear, and one end of the drive shaft is additionally provided with driving mechanism.
By using above-mentioned technical proposal, when work, drives movable sleeve to slide along drive shaft by regulating mechanism, make activity
It drives gear to engage with the driven gear of transmission shaft on set, then drive shaft turns is driven by driving mechanism, drive can be passed through
Moving gear and driven gear intermeshing drive transmission shaft rotation, so that driving wheel be driven to rotate, and then realize the movement of body,
When being moved to suitable position, stop drive shaft turns, drives movable sleeve mobile by regulating mechanism, make third hand tap gear and second
Bevel gear engagement, then transmission shaft rotation is driven by driving mechanism, it can mutually be nibbled by third hand tap gear with second bevel gear
Crossed belt moves connecting shaft rotation, then is intermeshed tape splicing by first bevel gear and second bevel gear and moves sliding seat rotation, thus band
The rotation of motivation body, overall volume is smaller, and flexibility ratio is higher, applicable different production environment.
The utility model is further arranged to: the regulating mechanism include be rotationally connected with the loose collar of movable sleeve one end with
And it is fixedly arranged on the pull rod of movable circumferential surface, axis direction driving identical with drive axis direction is additionally provided on the pedestal
Cylinder, the telescopic rod of driving cylinder are fixedly connected on pull rod far from loose collar one end.
By using above-mentioned technical proposal, when work, driving cylinder telescopic rod is flexible to drive strut along drive axis
Direction sliding so that loose collar be driven to slide, and then drives movable sleeve sliding, to realize that driving gear is engaged in driven gear
Or third hand tap gear is engaged in second bevel gear, and it is easy to use, it is easy to operate.
The utility model is further arranged to: the circumferential surface of the movable sleeve offers annular centered on the axis of movable sleeve
The inner ring of slot, the loose collar can be inserted in annular groove, and movable sleeve and loose collar coaxial line.
By using above-mentioned technical proposal, it can be realized movable sleeve and be rotationally connected with loose collar, easy to use, structure letter
It is single.
The utility model is further arranged to: the loose collar includes two semi-rings being detachably connected.
By using above-mentioned technical proposal, can just be overhauled with the assembly and disassembly of loose collar, it is easy to use.
The utility model is further arranged to: the internal diameter of the loose collar is greater than the internal diameter of annular groove.
By using above-mentioned technical proposal, the abrasion between loose collar and movable sleeve can be reduced, extends loose collar and branch
The service life of pushing out ring.
The utility model is further arranged to: the both ends of the loose collar have been respectively fixedly connected with wearing layer.
By using above-mentioned technical proposal, the abrasion of loose collar end and support ring can be further reduced, extends and lives
The service life of rotating ring and support ring.
The utility model is further arranged to: the drive shaft circumferential surface is installed with bar blocks along the axis direction of drive shaft,
The inside of the movable sleeve offers the strip groove that sliding is connected to bar blocks in the axial direction.
By using above-mentioned technical proposal, it can be realized movable sleeve sliding by strip groove and bar blocks and be connected to drive shaft
Surface.
In conclusion the advantageous effects of the utility model are as follows:
1. when work, driving movable sleeve to slide along drive shaft by regulating mechanism, making the driving gear on movable sleeve and passing
The driven gear of moving axis engages, then drives drive shaft turns by driving mechanism, can pass through driving gear and driven gear phase
Mutually engagement drives transmission shaft rotation, so that driving wheel be driven to rotate, and then realizes the movement of body, when being moved to suitable position,
Stop drive shaft turns, drives movable sleeve mobile by regulating mechanism, engage third hand tap gear with second bevel gear, then pass through
Driving mechanism drives transmission shaft rotation, can drive connecting shaft rotation by third hand tap gear and second bevel gear intermeshing,
Tape splicing is intermeshed by first bevel gear and second bevel gear again and moves sliding seat rotation, so that body is driven to rotate, whole body
Product is smaller, and flexibility ratio is higher, applicable different production environment；
2. when work, driving cylinder telescopic rod is flexible can to drive strut to slide along drive axis direction, to drive work
Rotating ring sliding, and then movable sleeve sliding is driven, to realize that driving gear is engaged in driven gear or third hand tap gear is engaged in
Second bevel gear, it is easy to use, it is easy to operate；
3. can be realized the surface that movable sleeve sliding is connected to drive shaft by strip groove and bar blocks.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model.
Fig. 2 is the drive shaft structural schematic diagram of the utility model.
Fig. 3 is the movable sleeve structural schematic diagram of the utility model.
Fig. 4 is the second magnetic pole structures perspective view of the explosion of the utility model.
Fig. 5 is the first magnetic pole structures perspective view of the explosion of the utility model.
In figure, 1, pedestal；11, transmission shaft；111, driven gear；12, unpowered axis；13, driving wheel；14, drive shaft；
141, driving motor；142, bar blocks；15, movable sleeve；151, strip groove；152, gear is driven；153, third hand tap gear；154,
Annular groove；16, connecting shaft；161, first bevel gear；162, second bevel gear；17, loose collar；171, semi-ring；172, pull rod；
18, driving cylinder；2, sliding seat；21, Rotational Cylindrical；22, ring gear is bored；3, pillar；31, the first magnetic sheet；32, pressing plate；33, spiral shell is compressed
Bolt；4, bearing plate；41, elevator；42, hoisting rope；5, tong holder；51, claw beam；52, clamp；53, the second magnetic sheet；54, nylon hooks
Band；6, cushion；61, nylon velvet band.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.
It referring to Fig.1, is a kind of frame-type forging manipulator disclosed by the utility model, the upside including pedestal 1, pedestal 1
It is rotatably connected to sliding seat 2, organism is set on the upside of sliding seat 2.
Referring to Fig. 2, pedestal 1 is in rectangular parallelepiped structure, and one end of pedestal 1 is rotatably connected to the transmission shaft of axis horizontal setting
11, and its other end is rotatably connected to the horizontally disposed unpowered axis 12 of two axial lines, the axis of transmission shaft 11 and unpowered axis 12
In same level, and the axis direction of unpowered axis 12 and transmission shaft 11 is each perpendicular to the length direction of pedestal 1.Transmission shaft
11 have also been respectively fixedly connected with driving wheel 13 with the both ends without moving axis.
Referring to Fig. 2 and Fig. 3, the corresponding transmission shaft 11 of pedestal 1 is also rotatably connected to drive shaft close to the side of unpowered axis 12
14, the axis of drive shaft 14 is identical as the axis direction of transmission shaft 11, and one end of drive shaft 14 is provided with driving mechanism, this implementation
For driving motor 141, the circumferential surface of drive shaft 14 is fixedly connected with the driving mechanism used in example along the axis direction of drive shaft 14
Bar blocks 142 are also arranged with movable sleeve 15, movable sleeve 15 and 14 coaxial line of drive shaft, the corresponding item of movable sleeve 15 in drive shaft 14
The position of shape block 142 offers strip groove 151, can be realized movable sleeve 15 by bar blocks 142 and the mutual cooperation of strip groove 151
Sliding is connected in drive shaft 14, and the driving gear of one Yu 15 coaxial line of movable sleeve are fixedly connected on the circumferential surface of movable sleeve 15
152, the circumferential surface of transmission shaft 11 is also fixedly connected with the driven gear 111 with 11 coaxial line of transmission shaft, and sliding movable sleeve 15 can
The driven gear 111 of the driving gear 152 and transmission shaft 11 that make movable sleeve 15 is intermeshed, to drive in driving motor 141
Drive shaft 14 is able to drive the rotation of transmission shaft 11 after rotating, and then driving wheel 13 is driven to rotate, and realizes the movement of pedestal 1.
2 downside of sliding seat is fixedly connected with Rotational Cylindrical 21 by axis of the center line of sliding seat 2, and Rotational Cylindrical 21 is rotatablely connected
In pedestal 1.The downside of sliding seat 2 is also fixedly connected with the cone ring gear 22 with 21 coaxial line of Rotational Cylindrical, the corresponding cone ring gear 22 of pedestal 1
Position between drive shaft 14 is rotatably connected to axis direction perpendicular to the connecting shaft 16 of 14 axis direction of drive shaft, connecting shaft
16 one end is fixedly connected with the first bevel gear 161 with 16 coaxial line of connecting shaft, and first bevel gear 161 is engaged in bevel gear
Ring, the other end of connecting shaft 16 are fixedly connected with the second bevel gear 162 with 16 coaxial line of connecting shaft, on the circumferential surface of movable sleeve 15
Also be fixedly connected with the third hand tap gear 153 with 15 coaxial line of movable sleeve, sliding movable sleeve 15 can make third hand tap gear 153 with
Second bevel gear 162 is intermeshed, to be able to drive 16 turns of connecting shaft after driving motor 141 drives drive shaft 14 to rotate
It is dynamic, to be able to drive the rotation of sliding seat 2 by first bevel gear 161 and the intermeshing of bevel gear 22 again.
One end that the side of drive shaft 14 is additionally provided with the adjustment structure movable sleeve 15 that movable sleeve 15 can be driven to slide is solid
Fixed using the axis of movable sleeve 15 is that axis offers annular groove 154, and positioning mechanism is including being sheathed on movable sleeve 15 and inner ring energy
The loose collar 17 being enough inserted in annular groove 154, the internal diameter of loose collar 17 are greater than the internal diameter of annular groove 154, and loose collar 17
Both ends can be connected to the two sides of annular groove 154, and loose collar 17 includes two semi-rings 171, and shape is bolted in two semi-rings 171
At the domain, for the further service life for extending loose collar 17, the both ends of loose collar 17 have also been respectively fixedly connected with wearing layer.
A pull rod 172 is also fixedly connected on the outside of one circumferential surface of loose collar 17, the position of 1 respective drive of pedestal, 14 side is also fixed to be connected
It is connected to axis direction driving cylinder 18 identical with 14 axis direction of drive shaft, the telescopic rod end of driving cylinder 18 is fixedly connected on drawing
The one end of bar 172 far from loose collar 17.When work, 18 telescopic rod of driving cylinder is flexible can to drive strut along 14 axis side of drive shaft
To sliding, thus drive loose collar 17 slide, and then drive movable sleeve 15 slide, thus realize driving gear 152 be engaged in from
Moving gear 111 or third hand tap gear 153 are engaged in second bevel gear 162.
Fig. 1 is reviewed, body includes that more pillars 3 for being vertically arranged at 2 two sides of sliding seat respectively and level are fixedly connected
The bearing plate 4 of 3 upper end of Yu Duogen pillar, it is also horizontally disposed between the pillar 3 of two sides to have tong holder 5, pincers are fixedly connected on tong holder 5
Bar 51, one end of claw beam 51 extend tong holder 5 and are fixedly connected with clamp 52.4 upside of bearing plate is also fixedly connected with elevator
41, it is provided with more on elevator 41 is connect with tong holder 5 and is able to drive tong holder 5 with the starting of elevator 41 and moved along the vertical direction
Hoisting rope 42.
Referring to Fig. 4 and Fig. 5, buffer gear is provided between tong holder 5 and pillar 3, buffer gear includes being fixedly connected on branch
Column 3 close to 5 side of tong holder the first magnetic sheet 31 and be fixedly connected on the second magnetic sheet 53 of 5 two sides of tong holder, close to each other
One magnetic sheet 31 is opposite with the magnetic pole of the second magnetic sheet 53.Tong holder 5 and each side close to each other of pillar 3 are also provided with cushion
6, in the utility model, cushion 6 uses rubber material.Tong holder 5 is close to the fixed company of mode that the side of pillar 3 is all made of bonding
It is connected to nylon and hooks band 54, the cushion 6 being set on tong holder 5 is fixedly connected to nylon velvet band 61, Buddhist nun close to the side of tong holder 5
Dragon, which hooks band 54, to complement each other to form velcro fastener with nylon velvet band 61, to realize that cushion 6 connects with the detachable of tong holder 5
It connects, on pillar 3 and is provided with the adjacent two sides in 6 side of cushion to be respectively arranged with length direction identical as 3 length direction of pillar
Pressing plate 32, the two sides of cushion 6 can be inserted between pressing plate 32 and pillar 3, and multiple ends are also equipped on pressing plate 32
Portion can be threadedly connected to the hold-down bolt 33 of 3 side wall of pillar, by tightening hold-down bolt 33, pressing plate 32 can be made to tend to close
The direction of pillar 3 is mobile to clamp cushion 6, and when needing to dismantle cushion 6, anti-rotation bolt tends away from pressing plate 32
The direction of pillar 3 is mobile, can unclamp cushion 6.When work, when tong holder 5 generates shock impacts to pillar 3, the first magnetic sheet
31 and second magnetic sheet 53 opposite with 31 magnetic pole of the first magnetic sheet can tong holder 5 and pillar 3 will collide generate it is biggish strong
Then magnetic repulsion, when pillar 3 and the collision of tong holder 5, passes through setting to reduce the impact force between tong holder 5 and pillar 3
Cushion 6 can further reduce the impact force of tong holder 5 Yu pillar 3, to protect tong holder 5 and pillar 3.When cushion 6
When due to damaged in collision, cushion 6 is disassembled to the cushion 6 more renewed from pillar 3 or tong holder 5.
The implementation principle of the present embodiment are as follows: when work, 18 telescopic rod of driving cylinder is flexible can to drive strut along drive shaft 14
Axis direction sliding so that loose collar 17 be driven to slide, and then drives movable sleeve 15 to slide, to realize that driving gear 152 is nibbled
It drives drive shaft 14 to rotate together in driven gear 111, then by driving mechanism, driving gear 152 and driven gear can be passed through
111 intermeshings drive transmission shaft 11 to rotate, so that driving wheel 13 be driven to rotate, and then realize the movement of body, are moved to conjunction
When right position is set, stop drive shaft 14 and rotate, strut can be driven along 14 axis side of drive shaft by the way that 18 telescopic rod of driving cylinder is flexible
It to sliding, drives movable sleeve 15 mobile, engages third hand tap gear 153 with second bevel gear 162, then driven by driving mechanism
Transmission shaft 11 rotates, and connecting shaft 16 can be driven to rotate by third hand tap gear 153 and the intermeshing of second bevel gear 162, then
Tape splicing, which is intermeshed, by first bevel gear 161 and second bevel gear 162 moves the rotation of sliding seat 2, so that body is driven to rotate, it is whole
Body small volume, flexibility ratio is higher, applicable different production environment.
In forging process, when tong holder 5 generate shock impacts to pillar 3 when, the first magnetic sheet 31 and with the first magnetic sheet 31
The second opposite magnetic sheet 53 of magnetic pole can will collide in tong holder 5 and pillar 3 and generate biggish strong magnetic repulsion, to reduce tong holder
Impact force between 5 and pillar 3 then, can be further by the cushion 6 of setting when pillar 3 and the collision of tong holder 5
The impact force for reducing tong holder 5 and pillar 3, to protect tong holder 5 and pillar 3.When cushion 6 is due to damaged in collision, will delay
It rushes pad 6 and disassembles the cushion 6 more renewed from pillar 3 or tong holder 5.
The embodiment of present embodiment is the preferred embodiment of the utility model, and not limitation is originally practical new according to this
The protection scope of type, therefore: the equivalence changes that all structures, shape, principle according to the utility model are done should all be covered by practical
Within novel protection scope.
Claims (7)
1. a kind of forging manipulator, including body, it is provided with sliding seat (2) on the downside of body, rotation connection on the downside of sliding seat (2)
Have pedestal (1), it is characterised in that: one end of pedestal (1) be rotatably connected to transmission shaft (11) and its other end rotation connection whether there is or not
Line shaft (12), transmission shaft (11) and unpowered axis (12) both ends have been respectively fixedly connected with driving wheel (13), on transmission shaft (11)
It is fixedly connected with driven gear (111), transmission shaft (11) is provided with close to the side of sliding seat (2) and is rotationally connected with pedestal (1)
Drive shaft (14), the bottom surface of sliding seat (2) is fixedly connected with cone ring gear (22), axis is also rotatably connected on pedestal (1) and is hung down
Directly in the connecting shaft (16) of transmission shaft (11) axis, one end of connecting shaft (16) is installed with the first cone for being engaged in cone ring gear (22)
Gear (161) and the other end of connecting shaft (16) is installed with second bevel gear (162), sliding is connected with activity in drive shaft (14)
It covers (15), driving gear (152) and third hand tap gear (153) is installed on movable sleeve (15), the side of drive shaft (14) is also
Being provided with can push movable sleeve (15) are mobile to make that gear (152) is driven to be engaged in driven gear (111) or third hand tap gear
(153) it is engaged in the regulating mechanism of second bevel gear (162), one end of the drive shaft (14) is additionally provided with driving mechanism.
2. a kind of forging manipulator according to claim 1, it is characterised in that: the regulating mechanism includes being rotationally connected with
The loose collar (17) of movable sleeve (15) one end and the pull rod (172) for being fixedly arranged on loose collar (17) circumferential surface, on the pedestal (1) also
It is provided with axis direction driving cylinder (18) identical with drive shaft (14) axis direction, the telescopic rod of driving cylinder (18) is fixedly connected
In pull rod (172) far from loose collar (17) one end.
3. a kind of forging manipulator according to claim 2, it is characterised in that: the circumferential surface of the movable sleeve (15) is with activity
It is offered annular groove (154) centered on the axis of set (15), the inner ring of the loose collar (17) can be inserted in annular groove (154)
It is interior, and movable sleeve (15) and loose collar (17) coaxial line.
4. a kind of forging manipulator according to claim 3, it is characterised in that: the loose collar (17) includes detachably connecting
Two semi-rings (171) connect.
5. a kind of forging manipulator according to claim 4, it is characterised in that: the internal diameter of the loose collar (17) is greater than ring
The internal diameter of shape slot (154).
6. a kind of forging manipulator according to claim 5, it is characterised in that: the both ends of the loose collar (17) are solid respectively
Surely it is connected with wearing layer.
7. a kind of forging manipulator according to claim 1, it is characterised in that: drive shaft (14) circumferential surface is along drive shaft
(14) axis direction is installed with bar blocks (142), and the inside of the movable sleeve (15) offers sliding connection in the axial direction
Strip groove (151) in bar blocks (142).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821973281.9U CN209363537U (en) | 2018-11-28 | 2018-11-28 | A kind of forging manipulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821973281.9U CN209363537U (en) | 2018-11-28 | 2018-11-28 | A kind of forging manipulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209363537U true CN209363537U (en) | 2019-09-10 |
Family
ID=67834302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821973281.9U Expired - Fee Related CN209363537U (en) | 2018-11-28 | 2018-11-28 | A kind of forging manipulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209363537U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112720311A (en) * | 2021-03-31 | 2021-04-30 | 山东科技职业学院 | Pipeline dismouting auxiliary table |
-
2018
- 2018-11-28 CN CN201821973281.9U patent/CN209363537U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112720311A (en) * | 2021-03-31 | 2021-04-30 | 山东科技职业学院 | Pipeline dismouting auxiliary table |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190910 Termination date: 20211128 |