CN212310896U - Cylinder jacket drilling equipment - Google Patents
Cylinder jacket drilling equipment Download PDFInfo
- Publication number
- CN212310896U CN212310896U CN202020915144.0U CN202020915144U CN212310896U CN 212310896 U CN212310896 U CN 212310896U CN 202020915144 U CN202020915144 U CN 202020915144U CN 212310896 U CN212310896 U CN 212310896U
- Authority
- CN
- China
- Prior art keywords
- sleeve
- positioning
- cylinder
- drilling
- bottom plate
- 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
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 53
- 238000003825 pressing Methods 0.000 claims description 18
- 230000006835 compression Effects 0.000 claims description 14
- 238000007906 compression Methods 0.000 claims description 14
- 210000005056 cell body Anatomy 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000000243 solution Substances 0.000 description 5
- 238000003754 machining Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 210000002421 cell wall Anatomy 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Landscapes
- Drilling And Boring (AREA)
Abstract
The utility model discloses a cylinder jacket drilling equipment. This kind of cylinder jacket drilling equipment includes: a base plate; the drilling unit is connected to the bottom plate; the positioning sleeve assembly is arranged on the bottom plate and used for positioning one end of the cylinder sleeve; and the compressing assembly is connected to the bottom plate and used for positioning the cylinder sleeve in the positioning sleeve assembly. This kind of cylinder jacket drilling equipment when using, earlier through the position sleeve subassembly and compress tightly the subassembly with the cylinder jacket location in the device to drill the cylinder jacket through the drilling unit, thereby realized carrying out the function of driling to the cylinder jacket.
Description
Technical Field
The utility model relates to a machining equipment, in particular to cylinder jacket drilling equipment.
Background
The cylinder sleeve is a cylindrical part and is arranged in a cylinder body hole of the machine body, and the cylinder sleeve is tightly pressed and fixed by a cylinder cover. For example, a patent named cylinder liner disclosed in chinese patent database, application No. CN201720225648.8, application No. 2017.03.09, publication No. CN206571586U, and publication No. 2017.10.20, the outer wall of the cylinder liner is provided with a notch, which is a functional notch, so that when drilling a pin hole in the outer wall of the cylinder liner of this type, the position of the pin hole to be drilled needs to be accurately positioned, while the side pin hole of the cylinder liner is usually machined by a milling machine, a drilling machine, and the like, and the pin hole positioning and machining method is as follows: 1. marking out the central line of the large excircle when cutting the notch at the lower end by a wire; 2. drawing an axial position line by using a vernier caliper; 3. centering the center position by using a center; 4. changing a drill bit to drill; the mode of above-mentioned processing pinhole is comparatively loaded down with trivial details, and lathe such as milling machine, drilling machine are mostly bottleneck process, and process time is long, and the processing variety is many, and has taken a large amount of time to the processing of this kind of simple pinhole, can not make the utilization ratio maximize of equipment, causes the waste of resource.
SUMMERY OF THE UTILITY MODEL
This application is through providing a cylinder jacket drilling equipment to the realization is sheathe the processing of pinhole to the cylinder.
The embodiment of the application provides a cylinder jacket drilling equipment, includes:
a base plate;
a drilling unit connected to the base plate;
a locating sleeve assembly mounted to the base plate for locating one end of a cylinder liner;
a compression assembly connected to the base plate, the compression assembly for positioning the cylinder liner in the positioning sleeve assembly.
When the cylinder sleeve drilling device is used, a cylinder sleeve is positioned in the device through the positioning sleeve assembly and the pressing assembly, and the cylinder sleeve is drilled through the drilling unit.
On the basis of the technical scheme, the utility model discloses can also do as follows the improvement:
further: the position sleeve assembly includes:
the sleeve body is connected to the bottom plate, a positioning groove is formed in the end face of the sleeve body, and the positioning groove is sleeved at one end of the cylinder sleeve. The beneficial effect of this step: can make stable grafting of cylinder jacket in its inside through the constant head tank, fix a position the terminal surface of cylinder jacket by the tank bottom of constant head tank, the cell wall of constant head tank is fixed a position the outer wall of cylinder jacket to realize axial and radial positioning.
Further: the position sleeve assembly further comprises:
the first sliding block is connected to the bottom plate in a sliding mode, and the sleeve body is installed on the first sliding block. The beneficial effect of this step: the position of the locating sleeve assembly is adjusted through the first sliding block.
Further: the compression assembly comprises:
a support connected to the base plate, the support for supporting the cylinder liner;
the pressing plate is connected to the supporting piece and used for pressing the cylinder sleeve to the positioning groove. The beneficial effect of this step: the cylinder sleeve inserted in the positioning groove is stably positioned through the pressing plate, and axial and radial positioning is realized.
Further: the compression assembly further comprises:
and the second sliding block is slidably connected to the bottom plate, and the supporting piece is arranged on the second sliding block. The beneficial effect of this step: the position of the pressing assembly is connected to the bottom plate in an adjustable mode through the second sliding block.
Further: the compression assembly further comprises:
the positioning block, the cell body has been seted up to the bottom plate, the cell body is used for the location the positioning block, the positioning block is used for making the cylinder jacket is fixed a position along circumference fast. The beneficial effect of this step: the positioning sleeve can be quickly positioned in the circumferential direction through the positioning block.
Further: it still includes:
the drilling unit is used for drilling the cylinder sleeve through the drilling sleeve. The beneficial effect of this step: the stability of drill bit drilling is improved through the drill bushing to through in time changing the drill bushing, be convenient for maintain the device.
Further: the drilling unit includes:
the mounting seat is mounted on the bottom plate;
the mounting plate is adjustably mounted on the mounting seat;
a drill coupled to the mounting plate.
Further: the drilling machine is a magnetic drill press.
Compared with the prior art, the beneficial effects of the utility model reside in that:
1. the positioning sleeve can be quickly and stably positioned through the positioning sleeve assembly and the pressing assembly;
2. the positioning sleeve assembly and the pressing assembly are connected with the bottom plate in a sliding manner, so that cylinder sleeves with different lengths can be clamped conveniently;
3. the circumferential direction of the cylinder sleeve is quickly positioned through the positioning block, and the position of a pin hole to be drilled is conveniently found;
4. this kind of cylinder jacket drilling equipment simple structure except that the magnetic drill press needs whole purchase, other spare parts all be the spare part that simple machining can produce to the cost is lower relatively, and convenient to use, simple need not occupy processing equipment such as drilling machine, boring machine, has realized the function of processing pinhole.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a drill bushing structure;
fig. 3 is a schematic view of the structure of the utility model during operation.
Wherein,
1, a bottom plate, 101 guide grooves and 102 groove bodies;
2, drilling a hole, 201 installing seats, 202 installing plates, 203 drilling machines and 204 kidney-shaped holes;
3, a positioning sleeve component, a 301 sleeve body, a 302 first sliding block, a 303 positioning groove, a 304 connecting plate and a 305 plane;
4, pressing components, 401 supporting pieces, 402 pressing plates, 403 grooves, 404 sliding blocks II, 405 positioning blocks and 406 chamfers;
5 drill bushing, 501 flanging.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience of description and simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integral; the mechanical connection can be realized by selecting a proper connection mode in the prior art, such as welding, riveting, threaded connection, bonding, pin connection, key connection, elastic deformation connection, buckle connection, interference connection and injection molding; or an electrical connection, transmitting energy or signals by electricity; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
As shown in fig. 1, a cylinder liner drilling apparatus includes: bottom plate 1, drilling unit 2, position sleeve subassembly 3, compress tightly subassembly 4, drilling unit 2 connects in bottom plate 1, and drilling unit 2 is used for the drilling, and position sleeve subassembly 3 is installed in bottom plate 1, and position sleeve subassembly 3 is used for making the area drilling end location of cylinder jacket, compresses tightly subassembly 4 and connects in the other end of bottom plate 1 for position sleeve subassembly 3, compresses tightly subassembly 4 and is arranged in making the cylinder jacket location in position sleeve subassembly 3.
As shown in fig. 1, the positioning sleeve assembly 3 includes: the sleeve body 301 is connected to one end of the base plate 1, the end face of the sleeve body 301, facing one side of the pressing assembly 4, is provided with a positioning groove 303, and the positioning groove 303 is used for being sleeved at the end part of the cylinder sleeve; the first sliding block 302 is connected to the bottom plate 1 in a sliding mode, and the sleeve body 301 is installed on the first sliding block 302; specifically, the positioning sleeve assembly 3 further comprises a connecting plate 304, the connecting plate 304 is mounted at the lower end of the sleeve body 301 through a bolt, the bottom plate 1 is respectively provided with two guide grooves 101 which are parallel to each other and are arranged at intervals, the first slider 302 is slidably arranged in the guide grooves 101, and two ends of the connecting plate 304 are respectively connected to the corresponding first slider 302 through bolts, so that the first slider 302 drives the sleeve body 301 to move linearly on the upper end surface of the bottom plate 1 when sliding in the guide grooves 101.
As shown in fig. 1, the pressing assembly 4 includes: the cylinder liner compression device comprises a support 401 and a compression plate 402, wherein the compression plate 402 is connected to the support 401, and the compression plate 402 is used for compressing the cylinder liner to a positioning groove 303; specifically, support piece 401 sliding connection is in bottom plate 1, support piece 401 up end is seted up fluted 403, recess 403 leads to the groove for the V-arrangement, clamp plate 402 passes through bolted connection in a side end face of backup pad, the cylinder jacket is placed in recess 403, it can make columniform cylinder jacket produce the characteristics of good centering effect to lead to the groove through the V-arrangement, make placing in recess 403 that the tip of cylinder jacket can be stable, then adjust the length that the bolt that sets up between clamp plate 402 and support piece 401 stretches into support piece 401 again, thereby make clamp plate 402 compress tightly the terminal surface of cylinder jacket, make the stable grafting in constant head tank 303 of the other end of cylinder jacket, tank bottom through constant head tank 303 stabilizes the location to the terminal surface of cylinder jacket, and the cell wall of constant head tank 303 stabilizes the location to.
As shown in fig. 1, the pressing assembly 4 further includes: a second sliding block 404, wherein the second sliding block 404 is slidably connected to the bottom plate 1, and the support 401 is installed on the second sliding block 404; specifically, two second sliding blocks 404 are arranged in the guide groove 101 in a sliding manner, and two ends of the supporting member 401 are connected to the corresponding second sliding blocks 404 through bolts, so that the sliding connection between the supporting member 401 and the bottom plate 1 is realized through the second sliding blocks 404.
As shown in fig. 1, the cylinder liner drilling device can clamp cylinder liners with different lengths by the sliding connection of the positioning sleeve assembly 3 and the bottom plate 1 and the sliding connection of the pressing assembly 4 and the bottom plate 1.
As shown in fig. 1, the pressing assembly 4 further includes: a positioning block 405, wherein the bottom plate 1 is provided with a groove body 102, the groove body 102 is used for positioning the positioning block 405, and the positioning block 405 is used for quickly positioning the cylinder sleeve along the circumferential direction; specifically, the groove width of the groove body 102 is the same as the width of the gap of the cylinder body, and the positioning block 405 is inserted into the gap and the groove body 102 in a clearance manner and can slide in the groove body 102 and the gap, so that the peripheral position of the cylinder sleeve is quickly positioned through the positioning block 405; the periphery of the end face of one side, facing the cylinder sleeve, of the positioning block 405 is provided with a chamfer 406, so that the positioning block 405 can conveniently and rapidly enter the groove body 102 and the gap, and the positioning speed of the positioning block 405 is further improved.
As shown in fig. 1, the drilling unit 2 includes: the drilling machine comprises a mounting seat 201, a mounting plate 202 and a drilling machine 203, wherein the mounting seat 201 is mounted on a bottom plate 1, the mounting plate 202 is adjustably mounted on the upper end surface of the mounting seat 201, and the drilling machine 203 is connected to the mounting plate 202; specifically, a kidney-shaped hole 204 is formed in the mounting plate 202, a bolt penetrates through the kidney-shaped hole 204 to mount the mounting plate 202 on the mounting base 201, the position of the mounting plate 202 is changed by changing the position of the bolt in the kidney-shaped hole 204, the drilling machine 203 adopts a magnetic drill, and the magnetic drill can be quickly positioned on the mounting plate 202 through electromagnetic force.
As shown in fig. 1 and 2, the cylinder liner drilling device further includes: the drilling unit 2 drills the cylinder sleeve through the drilling sleeve 5; specifically, the outer surface of the upper end of the sleeve body 301 is milled with a plane 305 parallel to the horizontal plane 305, the plane 305 is provided with a threaded hole vertically communicated with the positioning groove 303, the upper end of the sleeve body 301 is provided with a flange 501, the periphery of the lower end of the sleeve body 301 is provided with an external thread, the external thread is connected into the threaded hole of the sleeve body 301 through the external thread, the drill sleeve 5 is provided with a through hole along the axis, a drill bit of the magnetic drill base drills a cylinder sleeve in the positioning groove 303 through the through hole, the drill sleeve 5 is arranged to have certain bounce in the rotating process, if the drill bit directly drills through the through hole formed in the sleeve body 301, as the bounce generated in the rotating process of the drill bit can reduce the drilling precision and generate larger abrasion to the sleeve body 301, the drill sleeve 5 is separately arranged, the drill sleeve 5 is made of a more abrasion-resistant material, and the abrasion resistance, the drill bushing 5 is directly replaced, so that the drilling precision of the drilling device is improved, and the future maintenance is facilitated.
This kind of cylinder jacket includes the cylinder body at the during operation, insert the constant head tank 303 with the end of waiting to drill of cylinder jacket, put into recess 403 with the other end of cylinder jacket, make the circumference of cylinder jacket fix a position fast through locating piece 405, then stretch into the distance of the screw hole that the supporting seat was seted up through the bolt of adjusting connection clamp plate 402, thereby make clamp plate 402 sticis in the corresponding tip of cylinder jacket, and make the other end of cylinder jacket stably peg graft in constant head tank 303, drill the drill bit with the magnetic drill seat through drill bushing 5 and drill the cylinder jacket.
This kind of cylinder jacket drilling equipment has following advantage:
1. the positioning sleeve can be quickly and stably positioned through the positioning sleeve assembly and the pressing assembly;
2. the positioning sleeve assembly and the pressing assembly are connected with the bottom plate in a sliding manner, so that cylinder sleeves with different lengths can be clamped conveniently;
3. the circumferential direction of the cylinder sleeve is quickly positioned through the positioning block, and the position of a pin hole to be drilled is conveniently found;
4. this kind of cylinder jacket drilling equipment simple structure except that the magnetic drill press needs whole purchase, other spare parts all be the spare part that simple machining can produce to the cost is lower relatively, and convenient to use, simple need not occupy processing equipment such as drilling machine, boring machine, has realized the function of processing pinhole.
In the specification of the present invention, a large number of specific details are explained. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (9)
1. A cylinder liner drilling apparatus, comprising:
a base plate;
a drilling unit connected to the base plate;
a locating sleeve assembly mounted to the base plate for locating one end of a cylinder liner;
a compression assembly connected to the base plate, the compression assembly for positioning the cylinder liner in the positioning sleeve assembly.
2. The apparatus of claim 1, wherein the positioning sleeve assembly comprises:
the sleeve body is connected to the bottom plate, a positioning groove is formed in the end face of the sleeve body, and the positioning groove is sleeved at one end of the cylinder sleeve.
3. The apparatus of claim 2, wherein the positioning sleeve assembly further comprises:
the first sliding block is connected to the bottom plate in a sliding mode, and the sleeve body is installed on the first sliding block.
4. The apparatus of claim 3, wherein the compression assembly comprises:
a support connected to the base plate, the support for supporting the cylinder liner;
the pressing plate is connected to the supporting piece and used for pressing the cylinder sleeve to the positioning groove.
5. The apparatus of claim 4, wherein the compression assembly further comprises:
and the second sliding block is slidably connected to the bottom plate, and the supporting piece is arranged on the second sliding block.
6. The apparatus of claim 5, wherein the compression assembly further comprises:
the positioning block, the cell body has been seted up to the bottom plate, the cell body is used for the location the positioning block, the positioning block is used for making the cylinder jacket is fixed a position along circumference fast.
7. The apparatus of claim 2, further comprising:
the drilling unit is used for drilling the cylinder sleeve through the drilling sleeve.
8. The apparatus according to any one of claims 1-7, wherein the drilling unit comprises:
the mounting seat is mounted on the bottom plate;
the mounting plate is adjustably mounted on the mounting seat;
a drill coupled to the mounting plate.
9. The apparatus of claim 8, wherein the drill is a magnetic drill.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202020915144.0U CN212310896U (en) | 2020-05-26 | 2020-05-26 | Cylinder jacket drilling equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202020915144.0U CN212310896U (en) | 2020-05-26 | 2020-05-26 | Cylinder jacket drilling equipment |
Publications (1)
Publication Number | Publication Date |
---|---|
CN212310896U true CN212310896U (en) | 2021-01-08 |
Family
ID=74022939
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202020915144.0U Expired - Fee Related CN212310896U (en) | 2020-05-26 | 2020-05-26 | Cylinder jacket drilling equipment |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN212310896U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN117733201A (en) * | 2023-12-05 | 2024-03-22 | 无锡市悦斯顿冶金设备有限公司 | Special processing boring machine for taper holes of eccentric sleeves of hot rolling mills |
-
2020
- 2020-05-26 CN CN202020915144.0U patent/CN212310896U/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN117733201A (en) * | 2023-12-05 | 2024-03-22 | 无锡市悦斯顿冶金设备有限公司 | Special processing boring machine for taper holes of eccentric sleeves of hot rolling mills |
CN117733201B (en) * | 2023-12-05 | 2024-05-28 | 无锡市悦斯顿冶金设备有限公司 | Special processing boring machine for taper holes of eccentric sleeves of hot rolling mills |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN108723814B (en) | Thin-wall rotating part flange surface drilling and milling fixture | |
CN212310896U (en) | Cylinder jacket drilling equipment | |
CN101774030A (en) | Processing method of superfine shaft | |
CN113500471A (en) | Aerospace is with supplementary processingequipment of dysmorphism self-aligning bearing grinding machine | |
CN211332203U (en) | Clamping fixture for drilling guide hole in hydraulic cylinder guide sleeve | |
CN218891454U (en) | Combined roller clamp | |
CN211805178U (en) | Mechanical clamping tool for grinding thin-wall sleeve | |
CN212351092U (en) | Hole site processing tool | |
CN210334496U (en) | Processing structure for precisely processing pipe fitting by milling machine | |
CN207840223U (en) | For boring process unit of the small axle diameter to hole | |
CN219648729U (en) | Boring machine composite turret | |
CN216228169U (en) | Ball pin drill for drilling center hole | |
CN219074428U (en) | Drilling tool | |
CN219853210U (en) | Frock is used in processing of drive casing | |
CN221849378U (en) | Dual-purpose processing frock of turning and milling of eccentric hole machining efficiency promotes | |
CN213164160U (en) | Quick-change tool for vertically boring precise stepped hole | |
CN217800283U (en) | Turning tool with variable diameter | |
CN213496508U (en) | Universal adjustable eccentric part inner hole turning device | |
CN215279983U (en) | Machining device for connecting rod of mechanical press | |
CN219053608U (en) | Single-spindle multi-station deep hole machining equipment | |
CN218745058U (en) | Drilling guide device for positioning curved surface | |
CN218341555U (en) | Positioning device for machining integral differential internal spline | |
CN216371204U (en) | Drilling machine clamp for pulley shell | |
CN213350869U (en) | Device for processing shaft parts by using boring and milling equipment | |
CN220560493U (en) | Special-shaped part side drilling device |
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: 20210108 |