CN111761550A - Electric hammer auxiliary equipment for indoor vertical wall drilling - Google Patents
Electric hammer auxiliary equipment for indoor vertical wall drilling Download PDFInfo
- Publication number
- CN111761550A CN111761550A CN202010493965.4A CN202010493965A CN111761550A CN 111761550 A CN111761550 A CN 111761550A CN 202010493965 A CN202010493965 A CN 202010493965A CN 111761550 A CN111761550 A CN 111761550A
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- electric hammer
- fixed
- vertical wall
- handle
- axle
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/28—Supports; Devices for holding power-driven percussive tools in working position
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/24—Damping the reaction force
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling And Boring (AREA)
- Percussive Tools And Related Accessories (AREA)
Abstract
The invention relates to the technical field of electric tools and discloses electric hammer auxiliary equipment for indoor vertical wall drilling. Through the setting of protection casing for the department to the drilling of wall carries out certain hindrance, and the diffusion of dust large tracts of land and splashing of residue when reducing drilling reduce the pollution to the environment, improve the protection to operating personnel, simultaneously through the setting of the device that rises, make to carry out the bearing to the electric hammer, make it can reach required drilling height, avoid operating personnel to climb and bore, improve operating personnel's security.
Description
Technical Field
The invention relates to the technical field of electric tools, in particular to electric hammer auxiliary equipment for indoor vertical wall surface drilling.
Background
The electric hammer is an electric rotary hammer drill with a safety clutch and a pneumatic hammering mechanism, wherein a piston driven by a motor and provided with a crankshaft connecting rod is added on the basis of an electric drill, air is compressed in a cylinder in a reciprocating manner, so that the air pressure in the cylinder is changed periodically, and the changed air pressure drives a hammer in the cylinder to strike the top of a drill bit in a reciprocating manner, which is equivalent to knocking the drill bit by the hammer, but the electric rotary hammer drill has some defects in the using process, and comprises the following steps:
when utilizing the electric hammer to drill to perpendicular wall, by the handheld electric hammer handle of operating personnel, then aim at required drilling position, because the electric hammer can produce violent vibration, can cause the damage to operating personnel's musculature on the one hand, produce fatigue, on the other hand, by artifical handheld operation, when drilling, can't guarantee to the straightness that hangs down of drilling, produce the deviation easily, influence follow-up construction process and precision, and simultaneously, when the drilling position is higher, need operating personnel to stand and operate on the ladder, need operating personnel to keep healthy balance on the one hand, on the other hand need guarantee the precision of drilling, so the operation degree of difficulty is big, can't guarantee to operating personnel's safety.
When the electric hammer is used, because the electric hammer has a hammering process, in the drilling process, dust is easily diffused in a large area and broken slag is easily splashed, the glasses of an operator are easily damaged, and the operation difficulty is increased.
Disclosure of Invention
The invention provides electric hammer auxiliary equipment for indoor vertical wall surface drilling, which has the advantages of simplicity in operation and good protection performance and solves the problems in the background technology.
The invention provides the following technical scheme: the utility model provides an indoor perpendicular wall drilling is with electric hammer auxiliary assembly, includes bottom sprag board and electric hammer, movable mounting has the device that rises in the bottom sprag board, the top fixed mounting of the device that rises has fixed case, the top fixed mounting of fixed incasement chamber has the protection casing, electric hammer and protection casing activity joint, the last fixed surface of fixed case installs afterbody strutting arrangement, the right-hand member top movable mounting of electric hammer has the chucking device, the inside fixed mounting of electric hammer has the motor, the last fixed cup joint of loose axle of motor has worm gear, the bottom surface fixed mounting of protection casing has the driving tooth, worm gear and driving tooth meshing.
Preferably, the device that rises includes loose axle one and fixed axle, loose axle one just is located the left part of bottom sprag board with bottom sprag board activity joint, the fixed axle just is located the right part of bottom sprag board with bottom sprag board fixed connection, X type adjustable shelf one has been cup jointed in the activity on the loose axle one, the middle part fixedly connected with threaded rod of loose axle one, threaded rod and fixed axle threaded connection, loose axle one and fixed axle respectively have two and the longitudinal symmetry installation, loose axle one and fixed case activity joint, fixed axle and fixed case fixed connection.
Preferably, the electric hammer includes fuselage and handle, fuselage and handle swing joint, the right side fixed mounting of fuselage has the shock-absorbing rod, the shock-absorbing rod cup joints with the handle activity, the through-hole has been seted up on hand, the through-hole has three and diminishes from a left side right side diameter in proper order.
Preferably, the clamping device includes fly leaf and trapezoidal tooth, the upper surface swing joint of fly leaf and handle of telling, the top movable mounting of fly leaf has the support frame, the bottom surface fixed mounting of support frame has the spring, the bottom and the handle fixed connection of spring, the top fixed connection of trapezoidal tooth and protection casing inner chamber.
Preferably, both ends of the worm gear are fixedly provided with half-side gears.
Preferably, afterbody strutting arrangement includes the fixed frame in bottom, the inside activity joint of the fixed frame in bottom has elevating gear, elevating gear includes loose axle two, X type loose axle two has been cup jointed in the activity on the loose axle two, elevating gear's top activity joint has the rack, fixedly connected with rack on the loose axle two, the middle part movable mounting that the upper surface of protection casing and be located the fixed frame in bottom has turbine one, the top fixed mounting of turbine one has the gear, wheel and rack toothing, movable mounting has the rotation worm on the fixed frame in bottom, rotate worm and the meshing of turbine one, elevating gear's the range of height after strutting is at 0-2000 mm.
Preferably, the height range of the electric hammer after the X-shaped movable frame is expanded is 500-4000 mm.
The invention has the following beneficial effects:
1. through the setting of protection casing for the department to the drilling of wall carries out certain hindrance, and the diffusion of dust large tracts of land and splashing of residue when reducing drilling reduce the pollution to the environment, improve the protection to operating personnel, simultaneously through the setting of the device that rises, make to carry out the bearing to the electric hammer, make it can reach required drilling height, avoid operating personnel to climb and bore, improve operating personnel's security.
2. Through the setting of worm gear and drive teeth for the electric hammer can realize the auto-feed drilling, avoids operating personnel and electric hammer direct contact on the one hand, reduces the damage of vibration to operating personnel's the cause, further improves the protection to operating personnel, and on the other hand makes the drilling possess good depth of parallelism, guarantees the quality of drilling.
3. Through the setting of shock attenuation pole and handle for the fuselage obtains the buffering at the vibration in-process, reduces the conduction and the range that the vibration is strikeed, reduces the degree of wear of vibration process equipment, and through afterbody strutting arrangement's setting, the afterbody provides certain holding power to the protection casing simultaneously, and when preventing to drill, the afterbody holding power of protection casing is not enough, emptys backward.
Drawings
FIG. 1 is a schematic front view of the structure of the present invention;
FIG. 2 is a schematic side view of the structure of the present invention;
FIG. 3 is a schematic top view of a structural aft portion support of the present invention;
FIG. 4 is an enlarged view of the point A in FIG. 1;
FIG. 5 is an enlarged view of the point B in FIG. 2;
FIG. 6 is a schematic view of the arrangement of the worm gear and the gear teeth of the present invention.
In the figure: 1. a bottom support plate; 2. a lifting device; 21. a first movable shaft; 22. a fixed shaft; 23. an X-shaped movable frame I; 24. a threaded rod; 3. a fixed box; 4. a protective cover; 5. an electric hammer; 51. a body; 52. a shock-absorbing lever; 53. a handle; 54. a through hole; 6. a clamping device; 61. a movable plate; 62. a support frame; 63. a spring; 64. trapezoidal teeth; 7. a tail support device; 71. a bottom fixed frame; 72. a lifting device; 721. a second movable shaft; 722. an X-shaped movable frame II; 73. a rack; 74. a first turbine; 75. a gear; 76. rotating the worm; 8. a worm gear; 9. and a transmission gear.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, an electric hammer auxiliary device for indoor vertical wall drilling comprises a bottom supporting plate 1 and an electric hammer 5, wherein a lifting device 2 is movably mounted on the bottom supporting plate 1, a fixed box 3 is fixedly mounted at the top of the lifting device 2, a protective cover 4 is fixedly mounted at the top of an inner cavity of the fixed box 3, the electric hammer 5 is movably clamped with the protective cover 4, a tail supporting device 7 is fixedly mounted on the upper surface of the fixed box 3, a clamping device 6 is movably mounted at the top of the right end of the electric hammer 5, a motor is fixedly mounted inside the electric hammer 5, a worm gear 8 is fixedly sleeved on a movable shaft of the motor, transmission teeth 9 are fixedly mounted on the bottom surface of the protective cover 4, and the worm gear 8 is meshed with the transmission.
Wherein, the lifting device 2 comprises a first movable shaft 21 and a fixed shaft 22, the first movable shaft 21 is movably clamped with the bottom support plate 1 and is positioned at the left part of the bottom support plate 1, the fixed shaft 22 is fixedly connected with the bottom support plate 1 and is positioned at the right part of the bottom support plate 1, an X-shaped movable frame 23 is movably sleeved on the first movable shaft 21, a threaded rod 24 is fixedly connected at the middle part of the first movable shaft 21, the threaded rod 24 is in threaded connection with the fixed shaft 22, the first movable shaft 21 and the fixed shaft 22 are respectively provided with two and are vertically and symmetrically arranged, the first movable shaft 21 is movably clamped with the fixed box 3, the fixed shaft 22 is fixedly connected with the fixed box 3, the threaded rod 24 is rotated to pull the first movable shaft, and then make X type adjustable shelf 23 strut, promote the height of electric hammer 5, and then reach the drilling region, need not the manual work and carry out high altitude construction with electric hammer 5, guarantee workman's security.
Wherein, the electric hammer 5 includes fuselage 51 and handle 53, fuselage 51 and handle 53 swing joint, the right side fixed mounting of fuselage 51 has shock-absorbing rod 52, shock-absorbing rod 52 cup joints with handle 53 activity, through-hole 54 has been seted up on handle 53, through-hole 54 has threely and diminishes from a left side right side diameter in proper order, make electric hammer 5 when carrying out the drilling operation, when electric hammer 5 is to the hammering of wall, when causing the violent shake of self, shock-absorbing rod 52 compresses the inside air of handle 53, outwards discharge in the through-hole 54 simultaneously, slow down electric hammer 5 self impact, reduce the shake range of instrument.
Wherein, chucking device 6 includes fly leaf 61 and trapezoidal tooth 64, the upper surface swing joint of fly leaf 61 and handle 53 of telling, the top movable mounting of fly leaf 61 has support frame 62, the bottom surface fixed mounting of support frame 62 has spring 63, the bottom and the handle 53 fixed connection of spring 63, trapezoidal tooth 64 and the top fixed connection of protection casing 4 inner chamber, when worm gear 8 rotates, form the cooperation with driving tooth 9, drive electric hammer 5 left, realize feeding of drilling, simultaneously, fly leaf 61 and the mutual chucking of trapezoidal tooth 64, can prevent effectively that electric hammer 5 from retreating in the vibration, when electric hammer 5 gos forward, trapezoidal tooth 64 pushes down fly leaf 61, compress spring 63, and then realize the change of position.
Wherein, worm gear 8's both ends fixed mounting has half side gear, and at worm gear 8 pivoted in-process, only half the teeth of a cogwheel can form the cooperation with driving tooth 9, realizes feeding of electric hammer 5, and when turning to another half, state when electric hammer 5 is in the vibration and retreats prevents that electric hammer 5 when vibration, causes knocking bad between worm gear 8 and the driving tooth 9.
Wherein, the tail supporting device 7 comprises a bottom fixed frame 71, the inside of the bottom fixed frame 71 is movably clamped with a lifting device 72, the lifting device 72 comprises a second movable shaft 721, the second movable shaft 721 is movably sleeved with a second X-shaped movable frame 722, the top of the lifting device 72 is movably clamped with a rack 73, the second movable shaft 721 is fixedly connected with the rack 73, the upper surface of the shield 4 and the middle part of the bottom fixed frame 71 are movably provided with a first turbine 74, the top of the first turbine 74 is fixedly provided with a gear 75, the gear 75 is meshed with the rack 73, the bottom fixed frame 71 is movably provided with a rotating worm 76, the rotating worm 76 is meshed with the first turbine 74, the rotating worm 76 further drives the first turbine 74 and the gear 75 to rotate together, the gear 75 drives the rack 73, the second movable shaft 721 is drawn close to the middle part, the second X-shaped movable frame 722 is further stretched, and the rack 73 is contacted with the, and fixed, provide certain holding power to the afterbody of protection casing 4, prevent during the drilling, the afterbody holding power of protection casing 4 is not enough, emptys backward.
The height range of the electric hammer 5 after the first X-shaped movable frame 23 is expanded is 500-4000mm, and the height range of the lifting device 72 after the expansion is 0-2000mm, so that when a hole is drilled at a height of less than two meters, the tail part of the protective cover 4 is manually supported, and when the hole is drilled at a height of more than two meters, the tail part of the protective cover 4 is manually supported by the tail part supporting device 7, so that the danger of manual operation standing at a high position is reduced.
The working principle is that firstly, the electric hammer 5 is arranged in the protective cover 4, the worm gear 8 and the transmission gear 9 are installed in a matched mode, meanwhile, the movable plate 61 and the trapezoidal teeth 64 are in a clamping state, the threaded rod 24 is rotated, the movable shaft 21 is pulled rightwards, the X-shaped movable frame 23 is further unfolded, the height of the electric hammer 5 is lifted, the electric hammer 5 further reaches a drilling area, then, the left side of the protective cover 4 is attached to the wall, a drill bit on the electric hammer 5 is aligned to a required hole rotating position, the electric hammer 5 is electrified to start drilling, meanwhile, the motor drives the worm gear 8 to rotate, the electric hammer 5 is pushed leftwards, the movable plate 61 is pressed downwards by the trapezoidal teeth 64, the electric hammer is clamped again after feeding is achieved, the electric hammer 5 is prevented from retreating, if the drilling position is lower than 2000mm, the right portion of the protective cover 4 needs to be manually abutted, if the drilling position is higher than 2000mm, the worm gear 76 is rotated, the gear 75 drives the rack 73, so that the second movable shaft 721 is drawn close to the middle part, and the second X-shaped movable frame 722 is spread, so that the rack 73 is in contact with the top of the room, and a certain supporting force is provided for the tail part of the protective cover 4.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides an indoor perpendicular wall drilling is with electric hammer auxiliary assembly, includes bottom sprag board (1) and electric hammer (5), its characterized in that: movable mounting has ascending device (2) on bottom sprag board (1), the top fixed mounting that ascends device (2) has fixed box (3), the top fixed mounting of fixed box (3) inner chamber has protection casing (4), electric hammer (5) and protection casing (4) activity joint, the last fixed surface of fixed box (3) installs afterbody strutting arrangement (7), the right-hand member top movable mounting of electric hammer (5) has chucking device (6), the inside fixed mounting of electric hammer (5) has the motor, the fixed cover has been cup jointed worm wheel (8) on the loose axle of motor, the bottom surface fixed mounting of protection casing (4) has driving tooth (9), worm wheel (8) and driving tooth (9) meshing.
2. The electric hammer auxiliary device for indoor vertical wall surface drilling according to claim 1, characterized in that: rising device (2) include loose axle (21) and fixed axle (22), loose axle (21) just are located the left part of bottom sprag board (1) with bottom sprag board (1) activity joint, fixed axle (22) just are located the right part of bottom sprag board (1) with bottom sprag board (1) fixed connection, X type adjustable shelf (23) have been cup jointed in the activity on loose axle (21), the middle part fixedly connected with threaded rod (24) of loose axle (21), threaded rod (24) and fixed axle (22) threaded connection, respectively there are two and the longitudinal symmetry installation loose axle (21) and fixed axle (22), loose axle (21) and fixed case (3) activity joint, fixed axle (22) and fixed case (3) fixed connection.
3. The electric hammer auxiliary device for indoor vertical wall surface drilling according to claim 1, characterized in that: electric hammer (5) include fuselage (51) and handle (53), fuselage (51) and handle (53) swing joint, the right side fixed mounting of fuselage (51) has shock-absorbing rod (52), shock-absorbing rod (52) cup joint with handle (53) activity, through-hole (54) have been seted up on handle (53), through-hole (54) have three and from a left side right side diameter diminish in proper order.
4. The electric hammer auxiliary device for indoor vertical wall surface drilling according to claim 1, characterized in that: chucking device (6) include fly leaf (61) and trapezoidal tooth (64), the upper surface swing joint of fly leaf (61) and handle (53) of telling, the top movable mounting of fly leaf (61) has support frame (62), the bottom surface fixed mounting of support frame (62) has spring (63), the bottom and handle (53) fixed connection of spring (63), the top fixed connection of trapezoidal tooth (64) and protection casing (4) inner chamber.
5. The electric hammer auxiliary device for indoor vertical wall surface drilling according to claim 1, characterized in that: and half-side gears are fixedly arranged at the two ends of the worm gear (8).
6. The electric hammer auxiliary device for indoor vertical wall surface drilling according to claim 1, characterized in that: the tail supporting device (7) comprises a bottom fixing frame (71), a lifting device (72) is movably clamped in the bottom fixing frame (71), the lifting device (72) comprises a second movable shaft (721), the second movable shaft (721) is movably sleeved with a second X-shaped movable frame (722), a rack (73) is movably clamped at the top of the lifting device (72), the second movable shaft (721) is fixedly connected with the rack (73), a first turbine (74) is movably arranged on the upper surface of the protective cover (4) and in the middle of the bottom fixing frame (71), a gear (75) is fixedly arranged at the top of the first turbine (74), the gear (75) is meshed with the rack (73), a rotating worm (76) is movably mounted on the bottom fixing frame (71), the rotating worm (76) is meshed with the first turbine (74), the height range of the lifting device (72) after being propped open is 0-2000 mm.
7. The electric hammer auxiliary device for indoor vertical wall surface drilling according to claim 2, characterized in that: the height range of the electric hammer (5) after the X-shaped movable frame I (23) is unfolded is 500-4000 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010493965.4A CN111761550A (en) | 2020-06-03 | 2020-06-03 | Electric hammer auxiliary equipment for indoor vertical wall drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010493965.4A CN111761550A (en) | 2020-06-03 | 2020-06-03 | Electric hammer auxiliary equipment for indoor vertical wall drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111761550A true CN111761550A (en) | 2020-10-13 |
Family
ID=72720043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010493965.4A Withdrawn CN111761550A (en) | 2020-06-03 | 2020-06-03 | Electric hammer auxiliary equipment for indoor vertical wall drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111761550A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070158087A1 (en) * | 2006-01-10 | 2007-07-12 | Shun Tai Precision Co., Ltd. | Pneumatic hammer drill (I) |
| TWM501339U (en) * | 2015-01-28 | 2015-05-21 | Jin-Kuan Xie | Cylinder cushioning device of pneumatic tool |
| CN205733125U (en) * | 2015-07-09 | 2016-11-30 | 李仕贤 | A kind of roof, hand-operated elevation type indoor drilling equipment |
| CN206228521U (en) * | 2016-07-05 | 2017-06-09 | 王权 | It is a kind of can retaining wheelchair |
| CN207223893U (en) * | 2017-05-24 | 2018-04-13 | 河南省润丰建筑工程有限公司 | A kind of laborsaving impact drill of hydraulic engineering |
| CN108031899A (en) * | 2017-12-18 | 2018-05-15 | 郑州默尔电子信息技术有限公司 | A kind of construction site wall efficient drilling device |
| CN108081476A (en) * | 2017-12-18 | 2018-05-29 | 郑州默尔电子信息技术有限公司 | A kind of wall adjustable drilling aperture apparatus for building |
| CN109877977A (en) * | 2019-03-14 | 2019-06-14 | 成都中机盈科科技有限公司 | A kind of boring method for realizing accurate environment protection architecture multi-angle metope |
| CN110315479A (en) * | 2019-07-30 | 2019-10-11 | 韩月楼 | A kind of drilling aid |
-
2020
- 2020-06-03 CN CN202010493965.4A patent/CN111761550A/en not_active Withdrawn
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070158087A1 (en) * | 2006-01-10 | 2007-07-12 | Shun Tai Precision Co., Ltd. | Pneumatic hammer drill (I) |
| TWM501339U (en) * | 2015-01-28 | 2015-05-21 | Jin-Kuan Xie | Cylinder cushioning device of pneumatic tool |
| CN205733125U (en) * | 2015-07-09 | 2016-11-30 | 李仕贤 | A kind of roof, hand-operated elevation type indoor drilling equipment |
| CN206228521U (en) * | 2016-07-05 | 2017-06-09 | 王权 | It is a kind of can retaining wheelchair |
| CN207223893U (en) * | 2017-05-24 | 2018-04-13 | 河南省润丰建筑工程有限公司 | A kind of laborsaving impact drill of hydraulic engineering |
| CN108031899A (en) * | 2017-12-18 | 2018-05-15 | 郑州默尔电子信息技术有限公司 | A kind of construction site wall efficient drilling device |
| CN108081476A (en) * | 2017-12-18 | 2018-05-29 | 郑州默尔电子信息技术有限公司 | A kind of wall adjustable drilling aperture apparatus for building |
| CN109877977A (en) * | 2019-03-14 | 2019-06-14 | 成都中机盈科科技有限公司 | A kind of boring method for realizing accurate environment protection architecture multi-angle metope |
| CN110315479A (en) * | 2019-07-30 | 2019-10-11 | 韩月楼 | A kind of drilling aid |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WW01 | Invention patent application withdrawn after publication | ||
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Application publication date: 20201013 |