CN212739488U - Gear type moving set for linear conveying - Google Patents
Gear type moving set for linear conveying Download PDFInfo
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- CN212739488U CN212739488U CN202021330240.5U CN202021330240U CN212739488U CN 212739488 U CN212739488 U CN 212739488U CN 202021330240 U CN202021330240 U CN 202021330240U CN 212739488 U CN212739488 U CN 212739488U
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- 230000007246 mechanism Effects 0.000 claims abstract description 94
- 238000012423 maintenance Methods 0.000 abstract description 3
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Abstract
The utility model provides a gear formula for sharp transport removes group belongs to conveying machinery technical field to solve current sharp conveyor and remove the module and can not continuous transmission, the transportation volume is less, and the volume of conveyer belt is generally big on the side, and needs frequent maintenance, influences production efficiency's problem. Comprises a group of telescopic mechanisms which are hinged at the rear part of a workbench; the middle part of each group of hinge shafts of the telescopic mechanism is respectively and fixedly connected with a group of tensioning mechanisms; the top of each group of hinge shafts of the telescopic mechanism is respectively hinged with a group of symmetrical conveying shaft brackets; a group of annular conveyor belts are connected to the outer part of each two groups of non-adjacent conveying shaft brackets in a friction mode; the front part of the workbench is rotatably connected with a group of adjusting mechanisms; and the right side of the workbench is connected with a group of driving motors in a sliding manner. The utility model adapts to different environment and other factors by adopting the telescopic mechanism; high stability, difficult damage and higher efficiency.
Description
Technical Field
The utility model belongs to the technical field of transfer machine, more specifically say, in particular to gear formula removal group for sharp transport.
Background
Along with the development of times and the improvement of science and technology, the mechanization level is higher and higher, more and more products begin to use a production line type production mode, in order to enable the produced products to be processed more efficiently, a conveying device capable of carrying out one-way linear transportation is generally adopted between adjacent operation platforms for conveying, the conveying device is a machine for continuously conveying materials or products on a certain route, a sliding block with a driving device is adopted to move on a sliding rail in a small factory building to carry out one-time transmission on the products, and a conveying belt is adopted in a large factory building to realize one-way circulating transmission.
Based on the aforesaid, current sharp conveyor adopts the slider that has the removal module and the slide rail to cooperate the transmission more, remove the module and need make a round trip to slide in the transmission, can not realize continuous transmission, the transportation volume of removing the module simultaneously is smaller, the conveying efficiency ratio is lower, and the volume of conveyer belt is generally big partially, and big size length is fixed, the demand that the design that leads to some factory buildings can not satisfy, can't install and use, and use the belt completely to carry out the transmission, the time overlength leads to the transmission inefficacy easily, need frequent maintenance, relatively consume manpower and materials resource, influence production efficiency.
In view of the above, the present invention provides a gear type moving group for linear transportation, which is improved in view of the conventional structure and defects, and is intended to achieve the purpose of higher practical value.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a gear formula removal group for sharp transport, with solve the slider that current sharp conveyor adopted more to have the removal module and cooperate the transmission with the slide rail, remove the module and need make a round trip to slide in the transmission, can not realize continuous transmission, the transportation volume of removing the module simultaneously is smaller, the conveying efficiency ratio is lower, and the volume of conveyer belt is general big on the other side, and big size length is fixed, the demand that the design that leads to some factory buildings can not be satisfied, can't install and use, and the complete use belt carries out the transmission, the time overlength leads to the transmission inefficacy easily, need frequent maintenance, consume manpower and materials resource more, influence production efficiency's problem.
The utility model relates to a gear formula removes purpose and efficiency of group for sharp transport is reached by following specific technological means:
a gear type moving group for linear conveying comprises a workbench; the rear part of the workbench is hinged with a group of telescopic mechanisms; the middle part of each group of hinge shafts on the telescopic mechanism is respectively and fixedly connected with a group of tensioning mechanisms, each tensioning mechanism also comprises a tensioning wheel and a tensioning spring, the tensioning mechanisms are fixedly connected with the middle parts of the connecting rods of the hinge shafts of each group of telescopic mechanisms, the lower part of each group of tensioning mechanisms is elastically connected with a group of tensioning wheels, the inside of each tensioning mechanism is fixedly connected with a group of tensioning springs, and the top of each group of hinge shafts on the telescopic mechanisms is respectively and hingedly connected with a group of symmetrical conveying shaft brackets; a group of annular conveyor belts are connected to the outer part of each two groups of non-adjacent conveying shaft brackets in a friction mode; the front part of the workbench is rotatably connected with a group of adjusting mechanisms; and the right side of the workbench is connected with a group of driving motors in a sliding manner.
Further, the workstation is still including flexible support arm, and the workstation is installed at smooth subaerial, and the workstation divide into front and back two parts, and the workstation at rear portion can carry out the back-and-forth movement, and rear portion fixedly connected with a set of flexible support arm in the middle of the workstation, flexible support arm top hinged joint have a set of telescopic machanism, and telescopic machanism hinged joint is on two sets of workstations in front and back.
Furthermore, telescopic machanism is still including flexible adjusting lever, and the connecting rod cross connection of telescopic machanism inside constitutes and cuts fork drive mechanism, and the hinge pin crosspoint hinge joint in the middle of the first group connecting rod of telescopic machanism of every group has a set of flexible adjusting lever, and flexible adjusting lever stretches out from the trompil of front portion workstation, and flexible adjusting lever bottom is provided with partial nut form screw thread.
Furthermore, the adjusting mechanism further comprises a telescopic screw rod, an adjusting worm wheel and an adjusting worm, a group of hand wheels is fixedly connected to the right side of the adjusting mechanism, a group of adjusting worms is fixedly connected to two ends of a connecting rod on the left side of the adjusting mechanism respectively, each group of adjusting worms are meshed with a group of longitudinal adjusting worm wheels on the top of the adjusting mechanism respectively to form a worm and gear transmission mechanism, a group of telescopic screw rods is fixedly connected to the front portion of each group of adjusting worm wheels respectively, and the telescopic screw rods are meshed with the telescopic adjusting rods to form a screw transmission.
Furthermore, the transmission shaft frame further comprises a transmission gear and a transmission shaft gear, the transmission shaft frame is hinged to the top of the hinge shaft of each group of telescopic mechanisms, the top of each group of transmission shaft frame is connected with two groups of symmetrical transmission gears in a sliding mode, the middle of the top of each group of transmission shaft frame is connected with a group of transmission shaft gears in a rotating mode, and the front group of transmission gears and the rear group of transmission gears are respectively meshed with the transmission shaft gears in the middle to form a gear transmission mechanism.
Further, telescopic machanism is still including the expansion bracket transmission axle, and the hinge pin at every telescopic machanism connecting rod middle part is that hinged joint has a set of expansion bracket transmission axle, and the transmission pedestal is still including the transmission belt axle, and hinged joint has a set of transmission belt axle between the two sets of transmission pedestals about, anterior first group transmission belt axle right side fixedly connected with a set of driving motor, and conveyer belt friction connection is on the loop that expansion bracket transmission axle and two sets of nonadjacent transmission belt axle are constituteed.
Compared with the prior art, the utility model discloses following beneficial effect has:
the device of the utility model can adjust the distance between the front and the back groups of working tables to a certain extent by adopting the telescopic mechanism so as to be suitable for different products, production lines, applicable environments and other factors; the telescopic mechanism is adjusted by adopting the adjusting mechanisms of the manual transmission mechanisms, so that the structure is simple, the operation is convenient, and meanwhile, the stability is high and the damage is not easy to occur; through drive gear and conveying shaft gear cooperation and conveyer belt transmission, the structure is simpler, can transport some transmission slider formula conveyor or the inconvenient article of transporting of drum-type conveyor through the conveyer belt simultaneously, can the endless transport, and efficiency is higher, is provided with the life that the take-up pulley can prolong the conveyer belt simultaneously.
Drawings
Fig. 1 is a schematic diagram of the main body axial structure of the present invention.
Fig. 2 is a schematic diagram of the main body axial cross-section structure of the present invention.
Fig. 3 is a schematic diagram of the structure of the conveyor belt shaft side of the present invention.
Fig. 4 is a schematic diagram of the structure of the adjusting mechanism on the shaft side.
Fig. 5 is a schematic diagram of the shaft side structure of the telescopic mechanism of the present invention.
Fig. 6 is a schematic diagram of the shaft side structure of the tensioning mechanism of the present invention.
In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:
1. a work table; 101. a telescopic support arm; 2. a telescoping mechanism; 201. a telescopic adjusting rod; 202. a telescoping boom transmission shaft; 3. an adjustment mechanism; 301. a telescopic screw; 302. adjusting the worm gear; 303. adjusting the worm; 4. a transfer pedestal; 401. a transmission gear; 402. a transmission shaft gear; 403. a conveyor belt shaft; 5. a conveyor belt; 6. a tensioning mechanism; 601. a tension wheel; 602. tensioning the spring; 7. the motor is driven.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example (b):
as shown in figures 1 to 6:
the utility model provides a gear type moving group for linear conveying, which comprises a workbench 1; the rear part of the workbench 1 is hinged with a group of telescopic mechanisms 2; the middle part of each group of hinge shafts of the telescopic mechanisms 2 is respectively and fixedly connected with a group of tensioning mechanisms 6, each tensioning mechanism 6 also comprises a tensioning wheel 601 and a tensioning spring 602, the tensioning mechanisms 6 are fixedly connected with the middle part of the connecting rod of the hinge shaft of each group of telescopic mechanisms 2, the lower part of each group of tensioning mechanisms 6 is elastically connected with a group of tensioning wheels 601, the inside of each tensioning mechanism 6 is fixedly connected with a group of tensioning springs 602, when in use, the bottom of the expansion bracket transmission shaft 202 in each group of conveyor belts 5 is provided with a group of tensioning mechanisms 6, the length of the conveyor belts 5 can be increased through the tensioning wheels 601, the adaptability of the conveyor belts 5 during the adjustment of the expansion mechanisms 2 is realized, meanwhile, the conveyor belt 5 can be kept in a tight state through the tension spring 602, the friction transmission effect is better, the phenomenon that the conveyor belt 5 is too loose and skids or the conveyor belt 5 is too tight and cannot rotate is not easy to occur, and the tops of each group of hinge shafts of the telescopic mechanism 2 are respectively hinged with a group of symmetrical conveying shaft frames 4; a group of annular conveyor belts 5 are connected to the outer part of each two groups of non-adjacent conveyor shaft brackets 4 in a friction manner; the front part of the workbench 1 is rotatably connected with a group of adjusting mechanisms 3; the right side of the workbench 1 is connected with a group of driving motors 7 in a sliding way.
Wherein, workstation 1 is still including flexible support arm 101, workstation 1 is installed on smooth subaerial, workstation 1 divide into front and back two parts, workstation 1 at rear portion can carry out the back-and-forth movement, a set of flexible support arm 101 of rear portion fixedly connected with in the middle of workstation 1, flexible support arm 101 top hinged joint has a set of telescopic machanism 2, telescopic machanism 2 hinged joint is on two sets of workstations 1 in front and back, when using, telescopic machanism 2 is through anterior and flexible support arm 101 hinged joint, the rear portion is connected with workstation 1 at rear portion, make workstation 1 can carry out the seesaw at the connection state through adjusting telescopic machanism 2's interval, make two sets of workstations 1 in front and back form the certain distance on the straight line, the staff can operate at two sets of workstations 1 in front and.
Wherein, telescopic machanism 2 is still including flexible adjusting lever 201, the scissors drive mechanism is constituteed to the inside connecting rod cross connection of telescopic machanism 2, the hinge pin crosspoint hinged joint in the middle of the 2 first group connecting rods of telescopic machanism of every group has a set of flexible adjusting lever 201, stretch out in flexible adjusting lever 201 trompil from the front work platform 1, telescopic adjusting lever 201 bottom is provided with partial nut form screw thread, when using, through scissors drive mechanism control flexible adjusting lever 201 seesaw can change the interval between the 2 two sets of hinge pins of first telescopic machanism, utilize scissors mechanism to make telescopic machanism 2 change at horizontal length, thereby change the distance between the two sets of workstation 1 around changing.
Wherein, the adjusting mechanism 3 also comprises a telescopic screw 301, an adjusting worm wheel 302 and an adjusting worm 303, the right side of the adjusting mechanism 3 is fixedly connected with a group of handwheels, two ends of a connecting rod at the left side of the adjusting mechanism 3 are respectively and fixedly connected with a group of adjusting worms 303, each group of adjusting worms 303 are respectively meshed with a group of longitudinal adjusting worm wheels 302 at the top to form a worm and gear transmission mechanism, the front part of each group of adjusting worm wheels 302 is respectively and fixedly connected with a group of telescopic screws 301, the telescopic screws 301 are meshed with the telescopic adjusting rods 201 to form a screw transmission mechanism, when the adjusting mechanism is used, a worker manually rotates a hand wheel on the right side of the adjusting mechanism 3 to enable the adjusting worm 303 to rotate, the adjusting worm 303 drives the adjusting worm wheel 302 to synchronously rotate through the worm and gear transmission mechanism, the adjusting worm wheel 302 rotates to drive the fixedly connected telescopic screw 301 to synchronously rotate, and the telescopic screw 301 drives the telescopic adjusting rod 201 to move back and forth through the screw transmission mechanism.
Wherein, the transmission shaft frame 4 is further provided with a transmission gear 401 and a transmission shaft gear 402, the transmission shaft frame 4 is hinged at the top of the hinge shaft of each group of the telescopic mechanisms 2, the top of each group of the transmission shaft frame 4 is slidably connected with two groups of symmetrical transmission gears 401, the middle of the top of the transmission shaft frame 4 is rotatably connected with a group of transmission shaft gears 402, the front and back groups of the transmission gears 401 are respectively meshed with the middle transmission shaft gears 402 to form a gear transmission mechanism, when the transmission mechanism is used, when one group of the transmission gears 401 rotates, the transmission shaft gears 402 are driven to reversely rotate through the gear transmission mechanism, and then the transmission gears 401 are driven to reversely rotate through the other group of the gear transmission mechanism, so that the two groups of the transmission gears 401 in the transmission shaft.
Wherein, the telescoping mechanism 2 also includes the telescopic frame transmission shaft 202, the hinge axis in the middle of the connecting rod of each group of telescoping mechanism 2 is hinged with a group of telescopic frame transmission shafts 202, the transmission shaft frame 4 also includes the transmission belt shaft 403, the transmission belt shaft 403 is hinged between the left and right two groups of transmission shaft frames 4, the right side of the front first group of transmission belt shaft 403 is fixedly connected with a group of driving motor 7, the transmission belt 5 is connected with the loop composed of the telescopic frame transmission shaft 202 and the two groups of transmission belt shafts 403 which are not adjacent, when in use, the driving motor 7 is electrified to drive the first group of transmission belt shaft 403 to rotate, the transmission belt shafts 403 are enabled to rotate in the same direction through the gear transmission mechanism in the transmission shaft frame 4, because the transmission belt 5 is connected with the two groups of transmission belt shafts 403 which are not adjacent, the other group of transmission shaft frames 4 are enabled to be driven to rotate synchronously, and all the transmission shaft, the multi-group conveyor belts 5 synchronously rotate, one-way conveying of articles can be achieved through the plane formed by the upper portions, the conveyor belts 5 form a loop through the telescopic frame transmission shafts 202, the length of the plane formed can be synchronously changed when the width of the telescopic mechanism 2 is changed, and the conveyor belts 5 are enabled to continuously keep conveying.
The specific use mode and function of the embodiment are as follows:
the adjusting worm 303 drives the adjusting worm wheel 302 to rotate through a worm and worm gear transmission mechanism by manually rotating a hand wheel on the right side of the adjusting mechanism 3 by a worker, the adjusting worm wheel 302 drives the fixedly connected telescopic screw 301 to drive the telescopic adjusting rod 201 to move back and forth through a lead screw transmission mechanism, the telescopic adjusting rod 201 can change the front-back distance of the telescopic mechanism 2 through a scissor transmission mechanism, the telescopic mechanism 2 is hinged with the telescopic support arm 101 through the front part, the rear part is connected with the rear part of the workbench 1, and the workbench 1 can move back and forth in a connection state by adjusting the distance of the telescopic mechanism 2; the driving motor 7 is electrified to drive the first group of conveying belt shafts 403 to rotate, the transmission gear 401 drives the conveying shaft gear 402 to reversely rotate through the gear transmission mechanism, then the other group of gear transmission mechanism drives the transmission gear 401 to reversely rotate, so that the two groups of transmission gears 401 are in same-direction transmission, the conveying belt 5 is connected with the two groups of non-adjacent conveying belt shafts 403 to drive the other group of conveying shaft frames 4 to synchronously rotate, all the conveying shaft frames 4 synchronously rotate, the conveying belt 5 forms a loop with the expansion frame conveying shaft 202 and the tension wheel 601 through the two groups of non-adjacent conveying belt shafts 403, the length of the conveying belt 5 can be increased through the tension wheel 601, the tension spring 602 can keep a tight state when the width of the telescopic mechanism 2 is changed, the phenomenon that the conveyor belt 5 is too loose and skids or the conveyor belt 5 is too tight and cannot rotate is not easy to occur, meanwhile, the plurality of groups of conveyor belts 5 synchronously rotate to pass through the formed plane, so that the one-way conveying of the articles can be realized.
The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (6)
1. A gear formula removes group for straight line is carried which characterized in that: the gear type moving group for linear conveying comprises a workbench (1); the rear part of the workbench (1) is hinged with a group of telescopic mechanisms (2); the middle part of each group of hinge shafts on the telescopic mechanism (2) is respectively and fixedly connected with a group of tensioning mechanisms (6), each tensioning mechanism (6) further comprises a tensioning wheel (601) and a tensioning spring (602), each tensioning mechanism (6) is fixedly connected to the middle part of a connecting rod of the hinge shaft of each group of telescopic mechanism (2), the lower part of each group of tensioning mechanism (6) is elastically connected with a group of tensioning wheels (601), a group of tensioning springs (602) are fixedly connected inside each tensioning mechanism (6), and the top of each group of hinge shafts on the telescopic mechanism (2) is respectively and hingedly connected with a group of symmetrical transmission shaft frames (4); the outer parts of every two groups of non-adjacent conveying shaft brackets (4) are in friction connection with a group of annular conveying belts (5); the front part of the workbench (1) is rotatably connected with a group of adjusting mechanisms (3); the right side of the workbench (1) is connected with a group of driving motors (7) in a sliding mode.
2. A geared moving group for linear transport according to claim 1, characterized in that: workstation (1) is still including flexible support arm (101), and workstation (1) is installed at smooth subaerial, and workstation (1) divide into two parts around, and workstation (1) at rear portion can carry out the back-and-forth movement, and rear portion fixedly connected with a set of flexible support arm (101) in the middle of workstation (1), flexible support arm (101) top hinged joint has a set of telescopic machanism (2), and telescopic machanism (2) hinged joint is on two sets of workstations (1) in the front and back.
3. A geared moving group for linear transport according to claim 1, characterized in that: telescopic machanism (2) are still including flexible adjusting lever (201), and the connecting rod cross connection of telescopic machanism (2) inside constitutes scissors fork drive mechanism, and the hinge pin crosspoint hinge joint in the middle of the telescopic machanism (2) the first group connecting rod of every group has a set of flexible adjusting lever (201), and flexible adjusting lever (201) stretches out in front workstation (1) trompil, and flexible adjusting lever (201) bottom is provided with partial nut form screw thread.
4. A geared moving group for linear transport according to claim 1, characterized in that: the adjusting mechanism (3) is characterized by further comprising a telescopic screw (301), an adjusting worm wheel (302) and an adjusting worm (303), wherein a group of hand wheels are fixedly connected to the right side of the adjusting mechanism (3), a group of adjusting worms (303) are respectively fixedly connected to two ends of a connecting rod on the left side of the adjusting mechanism (3), each group of adjusting worms (303) are respectively meshed with a group of longitudinal adjusting worm wheels (302) on the top to form a worm and worm gear transmission mechanism, a group of telescopic screws (301) are respectively fixedly connected to the front portion of each group of adjusting worm wheels (302), and the telescopic screws (301) are meshed with the telescopic adjusting rods (201) to form a screw transmission.
5. A geared moving group for linear transport according to claim 1, characterized in that: the conveying shaft frame (4) further comprises a transmission gear (401) and a conveying shaft gear (402), the conveying shaft frame (4) is hinged to the top of a hinge shaft of each group of telescopic mechanisms (2), the top of each group of conveying shaft frame (4) is slidably connected with two groups of symmetrical transmission gears (401), a group of conveying shaft gears (402) are rotatably connected in the middle of the top of the conveying shaft frame (4), and the front and rear two groups of transmission gears (401) and the middle conveying shaft gears (402) are respectively meshed to form a gear transmission mechanism.
6. A geared moving group for linear transport according to claim 1, characterized in that: telescopic machanism (2) are still including telescopic frame transmission axle (202), the hinge pin at every group telescopic machanism (2) connecting rod middle part is hinged joint has a set of telescopic frame transmission axle (202), conveying shaft frame (4) are still including conveying belt axle (403), hinged joint has a set of conveying belt axle (403) between two sets of conveying shaft frame (4) about, anterior first set of conveying belt axle (403) right side fixedly connected with a set of driving motor (7), conveyer belt (5) friction connection is on the ring way that telescopic frame transmission axle (202) and two sets of nonadjacent conveying belt axle (403) are constituteed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021330240.5U CN212739488U (en) | 2020-07-09 | 2020-07-09 | Gear type moving set for linear conveying |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021330240.5U CN212739488U (en) | 2020-07-09 | 2020-07-09 | Gear type moving set for linear conveying |
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| Publication Number | Publication Date |
|---|---|
| CN212739488U true CN212739488U (en) | 2021-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021330240.5U Expired - Fee Related CN212739488U (en) | 2020-07-09 | 2020-07-09 | Gear type moving set for linear conveying |
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| CN (1) | CN212739488U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113184473A (en) * | 2021-05-10 | 2021-07-30 | 山东交通学院 | A reform transform device that is used for median concrete barrier of highway |
| CN113264316A (en) * | 2021-05-25 | 2021-08-17 | 中建五局华东建设有限公司 | Quick transfer platform of individual layer large tracts of land public building project material |
-
2020
- 2020-07-09 CN CN202021330240.5U patent/CN212739488U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113184473A (en) * | 2021-05-10 | 2021-07-30 | 山东交通学院 | A reform transform device that is used for median concrete barrier of highway |
| CN113264316A (en) * | 2021-05-25 | 2021-08-17 | 中建五局华东建设有限公司 | Quick transfer platform of individual layer large tracts of land public building project material |
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Granted publication date: 20210319 |