CN112493081A - A barren mountain tree planting machine for green tea tree is planted - Google Patents
A barren mountain tree planting machine for green tea tree is planted Download PDFInfo
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- CN112493081A CN112493081A CN202011426682.4A CN202011426682A CN112493081A CN 112493081 A CN112493081 A CN 112493081A CN 202011426682 A CN202011426682 A CN 202011426682A CN 112493081 A CN112493081 A CN 112493081A
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- workbench
- lead screw
- tea
- tea seedling
- worm
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G23/00—Forestry
- A01G23/02—Transplanting, uprooting, felling or delimbing trees
- A01G23/04—Transplanting trees; Devices for grasping the root ball, e.g. stump forceps; Wrappings or packages for transporting trees
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C5/00—Making or covering furrows or holes for sowing, planting or manuring
- A01C5/04—Machines for making or covering holes for sowing or planting
Abstract
The invention relates to the field of tea planting equipment, in particular to a barren mountain tree planter for planting green tea trees, which comprises a moving mechanism, a lifting mechanism, a workbench, a discharging pipe, an excavating mechanism, a pushing mechanism, a tea seedling placing cylinder, an air injection mechanism and a butt joint mechanism, wherein the moving mechanism is connected with the lifting mechanism; the lifting mechanism is arranged on the moving mechanism; the workbench is arranged on the working end of the lifting mechanism; a plurality of discharging pipes which are fixedly arranged at the bottom of the workbench; the digging mechanisms are provided with a plurality of digging mechanisms which are rotatably arranged on the blanking pipe; the pushing mechanism is arranged on the workbench; the tea seedling placing cylinders are provided with a plurality of tea seedling placing cylinders and are arranged on the working end of the pushing mechanism, the bottoms of the tea seedling placing cylinders are in butt joint with the top end of the blanking pipe in a working state, and the bottoms of the tea seedling placing cylinders are provided with sliding blocks in sliding connection with the working table; the air outlet end is arranged on the working end of the butting mechanism; the butt joint mechanism is arranged on the workbench, and the motion direction of the working end is arranged along the axial direction of the discharging pipe and the tea seedling placing cylinder; this scheme work efficiency is high, stable in structure, the cost of using manpower sparingly.
Description
Technical Field
The invention relates to the field of tea planting equipment, in particular to a barren mountain tree planting machine for planting green tea trees.
Background
In order to solve the above problems, the chinese patent with patent publication No. CN103947422B provides a tea tree planting method, which includes the steps of soil preparation, soil ph adjustment, planting, tea garden management, weeding and pest control, topdressing, trimming, and the like. This scheme is through adjusting the pH value to tea tree planting ground, improves the survival rate of tea tree and the output of tea tree.
However, the above-described scheme has the following problems: 1. the green tea tree can be prevented from growing slowly due to the fact that the pH value of the soil is changed when the green tea tree is rained or watered after being planted, and therefore the growth of the green tea tree is restrained; 2. above-mentioned scheme does not detect soil pH valve at green tea tree growing in-process, and the pH valve of control soil that can not be timely leads to green tea tree to burn the seedling, die when soil peracid or become alkaline, reduces green tea tree's survival rate.
Chinese patent CN201710171331.5 discloses a method for planting green tea, which comprises the steps of land renovation, planting land pre-culture, tea tree planting, interplanting, tea garden management, tea tree pruning and the like; the invention provides selenium element required by the growth of green tea trees by detecting the pH value of a tea tree planting field and regulating the pH value through a slow release ball. And then interplanting cardamine hupingshanensis to provide selenium element required by the growth of the green tea trees. Solves the problems of slow growth of green tea trees, burning seedlings and death of the green tea trees in the prior art.
This scheme need be to planting the tea seedling in planting the hole, and needs artifical manual one by one to excavate among the prior art and plant the hole, immigrate the tea seedling again, and is inefficient. The mountainous terrain suitable for the growth of the tea trees can cause difficulty for manual operation.
Disclosure of Invention
For solving above-mentioned technical problem, provide a barren mountain tree planting machine for green tea tree is planted, above-mentioned problem has been solved to this technical scheme, can excavate a plurality of planting holes simultaneously through excavating mechanism, improves planting efficiency greatly, places a butt joint through docking mechanism drive jet-propelled mechanism and tea seedling and has avoided the emergence that the tea seedling blockked, has improved positioning accuracy and structural stability through setting up first spout and the second spout on the workstation.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
a barren mountain tree planter for planting green tea trees is characterized by comprising a moving mechanism, a lifting mechanism, a workbench, a discharging pipe, an excavating mechanism, a pushing mechanism, a tea seedling placing barrel, an air injection mechanism and a butting mechanism;
the moving mechanism is used for moving the whole tree planter;
the lifting mechanism is arranged on the moving mechanism and used for controlling the lifting of the workbench;
the workbench is arranged on the working end of the lifting mechanism and used for installing the blanking pipe, the excavating mechanism, the pushing mechanism and the butt joint mechanism;
the plurality of discharging pipes are fixedly arranged at the bottom of the workbench and are uniformly distributed at intervals in the horizontal direction so as to send the tea seedlings into the planting pits;
the digging mechanisms are provided with a plurality of digging mechanisms, the number of the digging mechanisms corresponds to the number of the blanking pipes one by one, and the digging mechanisms are rotatably arranged on the blanking pipes and are used for digging planting pits in the mountainous region;
the pushing mechanism is arranged on the workbench, and the output end of the pushing mechanism can move towards the axis of the discharging pipe along the horizontal direction and is used for pushing the tea seedling placing cylinder towards the direction of the discharging pipe;
the tea seedling placing cylinders are provided with a plurality of feeding pipes, the number of the feeding pipes corresponds to the number of the feeding pipes one by one, the feeding pipes are communicated up and down and are arranged on the working end of the pushing mechanism, the bottoms of the feeding pipes are in butt joint with the top end of the feeding pipes and are positioned on the same axis in a working state, and the bottoms of the feeding pipes are provided with sliding blocks in sliding connection with the working table;
the air injection mechanisms are provided with a plurality of air injection mechanisms, the number of the air injection mechanisms corresponds to that of the tea seedling placing cylinders one by one, and the air outlet ends are arranged on the working ends of the butting mechanisms and used for introducing pressurized air flow into the tea seedling placing cylinders;
the butt joint mechanism is installed on the workbench, and the motion direction of the working end is arranged along the axial direction of the discharging pipe and the tea seedling placing cylinder so as to butt joint the top end of the tea seedling placing cylinder with the air injection mechanism.
Preferably, the lifting mechanism comprises a hanging frame, a first lead screw, a first guide rod, a first rotary driver and a lifting seat;
the hanging frame is arranged on the moving mechanism;
the axis of the first lead screw is vertically arranged, and two ends of the first lead screw are respectively and rotatably connected with the upper end and the lower end of the mounting rack;
the first guide rods are provided with a pair of pairs and symmetrically arranged at two sides of the first lead screw, the axis of the first guide rods is parallel to the axis of the first lead screw, and two ends of the first guide rods are fixedly connected with the upper end and the lower end of the hanging rack;
the first rotary driver is arranged at the top end of the hanging frame, and the output shaft is connected with the top end of the first lead screw and used for driving the first lead screw to rotate;
the lifting seat is in threaded connection with a first lead screw at the central position, and two sides of the lifting seat are in clearance fit with the first guide rod to install the workbench.
Preferably, the workbench comprises a bottom plate, a vertical plate, a side plate and a blanking through hole;
the bottom plate is horizontally arranged, one side of the bottom plate is fixedly connected with the working end of the lifting mechanism, and the bottom of the bottom plate is fixedly connected with the top end of the excavating mechanism;
the vertical plate is vertically arranged above one end of the bottom plate, which is far away from the lifting mechanism, and is used for installing the pushing mechanism;
the side plates are symmetrically and vertically arranged on two sides of the bottom plate in parallel and used for guiding the movement of the working end of the pushing mechanism;
the blanking through holes are uniformly distributed on the bottom plate at intervals, are fixedly connected with the blanking pipes and are used for allowing the blanking pipes to penetrate through the bottom plate.
Preferably, the workbench is also provided with a first sliding chute and a second sliding chute;
the first sliding chute is arranged on the bottom plate, extends from the vertical plate to the blanking through hole and is used for guiding and limiting the tea seedling placing barrel;
and the second sliding groove is formed in the inner side of the side plate and is in sliding connection with two sides of the working end of the pushing mechanism so as to guide and limit the movement of the working end of the pushing mechanism.
Preferably, the excavating mechanism comprises a mounting frame, a worm and gear linkage assembly, a sleeve, a soil turning claw and a first linear driver;
the mounting rack is mounted at the bottom of the workbench;
the worm and gear linkage assembly is horizontally arranged in an axis manner, two ends of the worm and gear linkage assembly are rotatably connected with two sides of the mounting frame, and the output end of the worm and gear linkage assembly is sleeved with the plurality of sleeves and used for synchronously driving the plurality of sleeves to rotate;
the sleeve is rotatably arranged on the blanking pipe and is positioned below the mounting frame, and a plurality of hinge lugs are uniformly distributed on the outer walls of the upper end and the lower end;
the soil turning claws are uniformly distributed around the axis of the worm gear and worm linkage assembly, can be mutually folded or separated, and are provided with a pair of hinge seats respectively hinged with the hinge lugs at the bottom end of the sleeve and a hinge seat hinged with the output end of the first linear driver;
the first linear driver is hinged with the hinge lug at the upper end of the sleeve, and the output end of the first linear driver is hinged with the soil turning claw.
Preferably, the worm and gear linkage assembly comprises a worm, a worm gear and a second rotary driver;
the worm gears are connected end to end, the axes of the worm gears are collinear, and the two ends of the worm gears are rotatably connected with the two sides of the mounting rack and used for driving the worm gears to rotate simultaneously;
the worm gears are provided with a plurality of worm gears, the number of the worm gears corresponds to that of the worms, and the worm gears are sleeved on the sleeve and used for driving the sleeve to rotate;
and the second rotary driver is arranged on the mounting frame, and the output shaft is connected with the end part of the worm and used for driving the worms to rotate simultaneously.
Preferably, the pushing mechanism comprises a pushing plate and a second linear driver;
the end face of the material pushing plate is vertical to the bottom of the workbench, and the material pushing plate can be horizontally arranged on the workbench in a displacement mode and is used for driving the tea seedling placing cylinders to move towards the feeding pipe;
and the second linear driver is arranged on the workbench, and the motion direction of the output shaft is horizontally arranged and fixedly connected with the material pushing plate for controlling the horizontal displacement of the material pushing plate.
Preferably, the air injection mechanism comprises an air inlet pipe, a flexible connecting pipe and an air pump;
the air inlet pipes are provided with a plurality of air inlet pipes, the number of the air inlet pipes corresponds to that of the tea seedling placing cylinders one by one, the air inlet pipes are of bending structures and are fixed on the working ends of the butting mechanisms, and the air outlet ends are collinear with the axes of the tea seedling placing cylinders in a working state;
the flexible connecting pipe is arranged on the air inlet end of the air inlet pipe, and the other end of the flexible connecting pipe is connected with the air pump;
and the air pump is arranged on the moving mechanism and used for introducing the pressurized airflow into the flexible connecting pipe.
Preferably, the docking mechanism comprises a support frame, a second lead screw, a second guide rod, a third rotary driver, a lifting plate and a docking sealing assembly;
the support frame is erected at the upper end of the workbench;
the axis of the second lead screw is vertically arranged, the top end of the second lead screw is rotatably connected with the support frame, and the bottom end of the second lead screw is rotatably connected with the workbench;
the second guide rods are provided with a pair of pairs and symmetrically arranged at two sides of the second lead screw, the axes of the second guide rods are parallel to the axis of the second lead screw, the top ends of the second guide rods are fixedly connected with the support frame, and the bottom ends of the second guide rods are fixedly connected with the workbench;
the third rotary driver is arranged at the top end of the support frame, and the output shaft is connected with the top end of the second lead screw and used for driving the second lead screw to rotate;
the center of the lifting plate is in threaded connection with the second lead screw, and the two sides of the lifting plate are in clearance fit with the second guide rod and are fixedly connected with the air injection mechanisms for driving the plurality of air injection mechanisms to lift;
butt joint seal assembly, one end is installed on a tea seedling and is placed a section of thick bamboo top, and the other end is installed in the end bottom of giving vent to anger of jet-propelled mechanism for improve the leakproofness of jet-propelled mechanism and push mechanism butt joint.
Preferably, the butt sealing assembly comprises a first sealing ring and a second sealing ring;
the first sealing ring is arranged at the top end of the tea seedling placing cylinder, and a female spigot is formed at the upper end of the first sealing ring;
and the second sealing ring is arranged at the bottom of the air outlet end of the air injection mechanism, and the lower end of the second sealing ring is provided with a male spigot.
Compared with the prior art, the invention has the beneficial effects that:
1. a plurality of planting holes can be dug simultaneously through the digging mechanism, the planting efficiency is greatly improved, and specifically, under the action of the lifting mechanism, the soil turning claw is pricked into the ground in a closed state. The controller sends a signal to the worm and gear linkage assembly, and the worm and gear linkage assembly receives the signal and then simultaneously drives the plurality of sleeves to drive the soil turning claws to perform circumferential reciprocating rotation, so that soil is loosened. Meanwhile, the controller controls the first linear driver to work, and the first linear driver enables the plurality of soil turning claws to be repeatedly folded and unfolded, so that the diameter of the planting pit is enlarged. After the planting pit is dug, the soil turning claw keeps an open state, and at the moment, the bottom end of the blanking pipe is right opposite to the planting pit, so that seedlings fall conveniently. The expanding angle of the soil turning claw is not too large, and the seedlings are ensured to just enter the planting pits. After the excavation is finished, the soil turning claw can be controlled by the first linear driver to fold, and soil is backfilled by matching with the lifting motion driven by the lifting mechanism;
2. the air injection mechanism is driven by the docking mechanism to dock with the tea seedling placing barrel, so that the tea seedling is prevented from being blocked, the structure is stable, specifically, the controller sends a signal to the third rotary driver, and the third rotary driver drives the second lead screw to rotate after receiving the signal. Under the driving action of the second lead screw and the limiting action of the second guide rod, the second guide rod drives the plurality of air injection mechanisms to synchronously lift. The butt joint sealing assembly improves the sealing performance of a butt joint part, and reduces unnecessary energy waste caused by leakage caused by ventilation in the tea seedling placing cylinder;
3. through setting up first spout and the second spout on the workstation and having improved positioning accuracy and structural stability, it is specific, first spout be dovetail structure, can improve a tea seedling and place a section of thick bamboo gliding stability in the bottom plate upper end. The length of first spout and second spout is corresponding with the distance of unloading pipe from the riser to guarantee that a section of thick bamboo is placed to the tea seedling and unloading pipe axis collineation.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a perspective view of the present invention in a non-operating state;
FIG. 3 is a front view of the present invention;
FIG. 4 is a cross-sectional view of section A-A of FIG. 3;
FIG. 5 is a perspective view of the table of the present invention;
FIG. 6 is a front view of the digging mechanism of the present invention;
FIG. 7 is a perspective view of the digging mechanism of the present invention;
FIG. 8 is a partial perspective view of the present invention;
FIG. 9 is an enlarged view of a portion of FIG. 4 at B;
fig. 10 is a perspective view of the first and second seal rings of the present invention in abutting engagement.
The reference numbers in the figures are:
1-a lifting mechanism; 1 a-hanging rack; 1 b-a first lead screw; 1 c-a first guide bar; 1 d-a first rotary drive; 1 e-a lifting seat;
2-a workbench; 2 a-a bottom plate; 2 b-a vertical plate; 2 c-side plate; 2 d-passing through a blanking hole; 2 e-a first chute; 2 f-a second chute;
3-a blanking pipe;
4-a digging mechanism; 4 a-a mounting frame; 4 b-a worm and gear linkage assembly; 4b 1-worm; 4b 2-worm gear; 4b3 — second rotary drive; 4 c-a sleeve; 4 d-digging claw; 4e — a first linear driver;
5-a pushing mechanism; 5 a-a material pushing plate; 5 b-a second linear drive;
6-placing the tea seedlings in a cylinder;
7-an air injection mechanism; 7 a-an air inlet pipe; 7 b-a flexible connecting tube;
8-a docking mechanism; 8 a-a support frame; 8 b-a second lead screw; 8 c-a second guide bar; 8 d-a third rotary drive; 8 e-a lifter plate; 8 f-butt seal assembly; 8e1 — first seal ring; 8e 2-second seal ring.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.
As shown in fig. 1, 2, 4, 7 and 8, a barren mountain tree planter for green tea tree planting comprises a moving mechanism, a lifting mechanism 1, a workbench 2, a blanking pipe 3, an excavating mechanism 4, a pushing mechanism 5, a tea seedling placing cylinder 6, an air injection mechanism 7 and a docking mechanism 8;
the moving mechanism is used for moving the whole tree planter;
the lifting mechanism 1 is arranged on the moving mechanism and used for controlling the lifting of the workbench 2;
the workbench 2 is arranged at the working end of the lifting mechanism 1 and is used for installing the blanking pipe 3, the excavating mechanism 4, the pushing mechanism 5 and the butt joint mechanism 8;
a plurality of discharging pipes 3 which are fixedly arranged at the bottom of the workbench 2 and are uniformly distributed at intervals in the horizontal direction for sending tea seedlings into the planting pits;
the digging mechanisms 4 are provided with a plurality of digging mechanisms, the number of the digging mechanisms corresponds to the number of the blanking pipes 3 one by one, and the digging mechanisms are rotatably arranged on the blanking pipes 3 and are used for digging planting pits in the mountainous region;
the pushing mechanism 5 is arranged on the workbench 2, and the output end of the pushing mechanism can move towards the axis of the discharging pipe 3 along the horizontal direction so as to push the tea seedling placing cylinder 6 towards the direction of the discharging pipe 3;
the tea seedling placing cylinders 6 are provided with a plurality of feeding pipes 3, the number of the feeding pipes corresponds to the number of the feeding pipes 3 one by one, the feeding pipes are communicated up and down, the feeding pipes are installed at the working ends of the pushing mechanisms 5, the bottoms of the feeding pipes are butted with the tops of the feeding pipes 3 and are positioned on the same axis in a working state, and sliding blocks connected with the workbench 2 in a sliding mode are arranged at the bottoms of the feeding pipes;
the air injection mechanisms 7 are provided with a plurality of air injection mechanisms, the number of the air injection mechanisms corresponds to that of the tea seedling placing cylinders 6 one by one, and air outlet ends are arranged on the working ends of the butting mechanisms 8 and used for introducing pressurized air flow into the tea seedling placing cylinders 6;
the butt joint mechanism 8 is installed on the workbench 2, and the motion direction of the working end is arranged along the axial direction of the discharging pipe 3 and the tea seedling placing barrel 6 so as to butt joint the air injection mechanism 7 and the top end of the tea seedling placing barrel 6.
The lifting mechanism 1, the excavating mechanism 4, the pushing mechanism 5, the air injection mechanism 7 and the butt joint mechanism 8 are all electrically connected with the controller. The moving mechanism is a common moving trolley used in mountainous regions, the specific structure is not described in detail, and the power source of each mechanism is loaded on the moving mechanism. A section of thick bamboo 6 is placed to tea seedling and unloading pipe 3 butt joint under the non-operating condition, and a section of thick bamboo 6 bottom is placed to tea seedling is blocked by workstation 2. The staff places the tea seedling that the same quantity of a section of thick bamboo 6 was placed to the tea seedling with quantity and tea seedling inside placing a section of thick bamboo 6. The staff moves the whole tree planter to the working area through the moving mechanism. The controller sends a signal to the lifting mechanism 1, and the lifting mechanism 1 drives the workbench 2 to descend after receiving the signal, so that the blanking pipe 3 is driven to insert the excavating mechanism 4 below the blanking pipe 3 into the ground. The controller sends a signal to the excavating mechanism 4, and after the excavating mechanism 4 receives the signal, a plurality of working ends of the excavating mechanism work simultaneously to excavate the mountain land into a plurality of planting pits. The controller sends a signal to push mechanism 5, and push mechanism 5 receives behind the signal simultaneously with a plurality of tea seedlings of being equipped with the tea seedling place a section of thick bamboo 6 and push away 3 directions to the unloading pipe, makes then the tea seedling place a 6 bottoms of section of thick bamboo and 3 top docks of unloading pipe and axis collineation, and the tea seedling is placed a 6 bottoms entering unloading pipe 3 and fall to planting under the action of gravity from the tea seedling and is planted in the hole. In order to avoid the blockage of the discharging pipe 3 and the tea seedling placing cylinder 6, the tea seedlings can not smoothly fall into the planting pit. The controller sends the signal and gives docking mechanism 8, and docking mechanism 8 receives the signal and drives a plurality of air jet mechanism 7 and place a section of thick bamboo 6 axial motion along the tea seedling, makes air jet mechanism 7 give vent to anger the end then and place a section of thick bamboo 6 top butt joint with the tea seedling, then places a section of thick bamboo 6 and unloading pipe 3 to the tea seedling and lets in the air current after the pressurization and spout the tea seedling from unloading pipe 3 bottom to planting in the hole. After the work is finished, the controller sends signals to the docking mechanism 8 and the pushing mechanism 5 to reset the docking mechanism and the pushing mechanism. The pushing mechanism 5 drives the tea seedling placing barrel 6 to reset. The staff replenishes the tea seedlings in the tea seedling placing cylinder 6. Thus realizing the rapid planting of the tea trees in whole rows or columns.
As shown in fig. 2, the lifting mechanism 1 includes a hanging frame 1a, a first lead screw 1b, a first guide rod 1c, a first rotary driver 1d and a lifting base 1 e;
a hanging frame 1a mounted on the moving mechanism;
the axis of the first lead screw 1b is vertically arranged, and two ends of the first lead screw are respectively and rotatably connected with the upper end and the lower end of the hanging rack 1 a;
the first guide rods 1c are provided with a pair of pairs and are symmetrically arranged at two sides of the first lead screw 1b, the axis of the first guide rods is parallel to the axis of the first lead screw 1b, and two ends of the first guide rods are fixedly connected with the upper end and the lower end of the hanging frame 1 a;
the first rotary driver 1d is arranged at the top end of the hanging frame 1a, and an output shaft is connected with the top end of the first lead screw 1b and used for driving the first lead screw 1b to rotate;
the lifting seat 1e is in threaded connection with a first lead screw 1b in the center, and two sides of the lifting seat are in clearance fit with the first guide rod 1c to mount the workbench 2.
The first rotary driver 1d is a servo motor electrically connected to the controller. The controller sends a signal to the first rotary driver 1d, and the first rotary driver 1d drives the first lead screw 1b to rotate after receiving the signal. Under the driving action of the first lead screw 1b and the limiting action of the first guide rod 1c, the lifting seat 1e drives the workbench 2 to lift in the vertical direction, so as to finally control the depth of the digging mechanism 4 inserted into the ground.
As shown in fig. 5, the worktable 2 includes a bottom plate 2a, a vertical plate 2b, a side plate 2c and a blanking through hole 2 d;
the bottom plate 2a is horizontally arranged, one side of the bottom plate is fixedly connected with the working end of the lifting mechanism 1, and the bottom of the bottom plate is fixedly connected with the top end of the excavating mechanism 4;
the vertical plate 2b is vertically arranged above one end of the bottom plate 2a far away from the lifting mechanism 1 and is used for installing the pushing mechanism 5;
a pair of side plates 2c, which are symmetrically and vertically installed on both sides of the bottom plate 2a in parallel to each other, for guiding the movement of the working end of the pushing mechanism 5;
the plurality of blanking through holes 2d are uniformly distributed on the bottom plate 2a at intervals, and are fixedly connected with the blanking pipe 3 to allow the blanking pipe 3 to penetrate through the bottom plate 2 a.
The floor 2a supports the excavating mechanism 4. The side plate 2c supports the bottom end of the docking mechanism 8. The pair of side plates 2c can avoid unnecessary deflection of the working end of the pushing mechanism 5, and the stability of the structure is improved. The inner wall of the blanking through hole 2d is welded with the outer wall of the top end of the blanking pipe 3, and the end face of the top end of the blanking pipe 3 is flush with the upper end of the bottom plate 2 a.
As shown in fig. 5, the worktable 2 is further provided with a first chute 2e and a second chute 2 f;
the first sliding chute 2e is arranged on the bottom plate 2a, extends from the vertical plate 2b to the blanking through hole 2d and is used for guiding and limiting the tea seedling placing barrel 6;
and the second sliding groove 2f is formed in the inner side of the side plate 2c, is in sliding connection with two sides of the working end of the pushing mechanism 5 and is used for guiding and limiting the movement of the working end of the pushing mechanism 5.
As shown in fig. 6, the digging mechanism 4 comprises a mounting frame 4a, a worm and gear linkage assembly 4b, a sleeve 4c, a soil turning claw 4d and a first linear driver 4 e;
the mounting rack 4a is mounted at the bottom of the workbench 2;
the worm and gear linkage assembly 4b is horizontally arranged in an axis manner, two ends of the worm and gear linkage assembly are rotatably connected with two sides of the mounting frame 4a, and the output end of the worm and gear linkage assembly is sleeved with the plurality of sleeves 4c and used for synchronously driving the plurality of sleeves 4c to rotate;
the sleeve 4c is rotatably arranged on the blanking pipe 3 and is positioned below the mounting frame 4a, and a plurality of hinge lugs are uniformly distributed on the outer walls of the upper end and the lower end;
the soil turning claws 4d are provided with a plurality of hinging seats which are uniformly distributed around the axis of the worm gear linkage assembly 4b and can be mutually folded or separated, and the hinging seats are respectively hinged with the hinging lugs at the bottom end of the sleeve 4c and the hinging seats hinged with the output end of the first linear driver 4 e;
and the first linear driver 4e is hinged with a hinge lug at the upper end of the sleeve 4c, and the output end of the first linear driver is hinged with the soil turning claw 4 d.
The first linear actuator 4e is a hydraulic cylinder and is driven by a hydraulic motor provided in the moving mechanism. The worm gear and worm linkage assembly 4b is electrically connected with the controller. Under the action of the lifting mechanism 1, the soil turning claw 4d is pricked into the ground in a closed state. The controller sends a signal to the worm and gear linkage assembly 4b, and the worm and gear linkage assembly 4b receives the signal and then simultaneously drives the plurality of sleeves 4c to drive the soil turning claws 4d to do circumferential reciprocating rotation, so that soil is loosened. Meanwhile, the controller controls the first linear driver 4e to operate, and the first linear driver 4e causes the plurality of soil turning claws 4d to repeatedly retract and expand, thereby enlarging the diameter of the planting pit. After the planting pit is dug, the soil turning claw 4d keeps an open state, and the bottom end of the discharging pipe 3 is opposite to the planting pit, so that seedlings can fall conveniently. The expansion angle of the soil turning claw 4d is not too large, and the seedlings are ensured to just enter the planting pits. After the excavation is finished, the soil turning claw 4d can be controlled by the first linear driver 4e to carry out furling action, and soil is backfilled by matching with the lifting motion driven by the lifting mechanism 1.
As shown in fig. 7, the worm gear-worm linkage assembly 4b includes a worm 4b1, a worm wheel 4b2, and a second rotary driver 4b 3;
a plurality of worm gears 4b1, which are connected end to end and have collinear axes, and the two ends of the worm gears are rotatably connected with the two sides of the mounting rack 4a, so as to drive a plurality of worm gears 4b2 to rotate simultaneously;
a plurality of worm wheels 4b2, the number of which corresponds to the number of the worms 4b1, sleeved on the sleeve 4c and used for driving the sleeve 4c to rotate;
and a second rotary driver 4b3 mounted on the mounting frame 4a, the output shaft being connected to the end of the worm 4b1 for driving the plurality of worms 4b1 to rotate simultaneously.
The second rotary driver 4b3 is a servo motor electrically connected to the controller. The controller sends a signal to the second rotation driver 4b3, the second rotation driver 4b3 receives the signal and drives the plurality of worms 4b1 to rotate simultaneously, and the plurality of worms 4b1 are connected through a rigid coupling. The plurality of worm gears 4b1 respectively rotate the plurality of worm wheels 4b2, which in turn drives the plurality of sleeves 4c to rotate.
As shown in fig. 8, the pushing mechanism 5 includes a material pushing plate 5a and a second linear driver 5 b;
the material pushing plate 5a is arranged on the workbench 2 in a horizontally displaceable manner, and the end surface of the material pushing plate is vertical to the bottom of the workbench 2 so as to drive the tea seedling placing cylinders 6 to move towards the blanking pipe 3;
and the second linear driver 5b is arranged on the workbench 2, and the motion direction of the output shaft is horizontally arranged and fixedly connected with the material pushing plate 5a so as to control the horizontal displacement of the material pushing plate 5 a.
The second linear actuator 5b is a hydraulic cylinder electrically connected to the controller. The two sides of the material pushing plate 5a are provided with convex blocks which are in sliding connection with the second sliding grooves 2f of the workbench 2. The controller sends a signal to the second linear driver 5b, and the second linear driver 5b receives the signal and then drives the tea seedling placing cylinders 6 to horizontally displace in the direction close to or far away from the axis of the discharging pipe 3 through the material pushing plate 5 a.
As shown in fig. 9, the air injection mechanism 7 includes an air inlet pipe 7a, a flexible connecting pipe 7b and an air pump;
the air inlet pipes 7a are provided with a plurality of air inlet pipes, the number of the air inlet pipes corresponds to that of the tea seedling placing cylinders 6 one by one, the air inlet pipes are of bending structures and are fixed on the working ends of the butting mechanisms 8, and the air outlet ends are collinear with the axes of the tea seedling placing cylinders 6 in a working state;
the flexible connecting pipe 7b is arranged on the air inlet end of the air inlet pipe 7a, and the other end of the flexible connecting pipe is connected with the air pump;
and an air pump mounted on the moving mechanism for introducing the pressurized air flow into the flexible connection tube 7 b.
The air pump is electrically connected with the controller, which is not shown in the figure. When the butt joint mechanism 8 controls the air outlet end of the air injection mechanism 7 to be in butt joint with the top end of the tea seedling placing barrel 6, the controller sends a signal to the air pump, and the air pump receives the signal and then guides the pressurized air flow into the tea seedling placing barrel 6 through the flexible connecting pipe 7b and the air inlet pipe 7a in sequence. The characteristic of the flexible connecting pipe 7b ensures that the air inlet pipe 7a can still stably ventilate when moving along with the working end of the butting mechanism 8.
As shown in fig. 3, the docking mechanism 8 includes a supporting frame 8a, a second lead screw 8b, a second guiding rod 8c, a third rotary driver 8d, a lifting plate 8e and a docking sealing assembly 8 f;
a support frame 8a, which is erected on the upper end of the worktable 2;
the axis of the second lead screw 8b is vertically arranged, the top end of the second lead screw is rotatably connected with the support frame 8a, and the bottom end of the second lead screw is rotatably connected with the workbench 2;
the second guide rods 8c are provided with a pair of pairs and are symmetrically arranged at two sides of the second lead screw 8b, the axes of the second guide rods are parallel to the axis of the second lead screw 8b, the top end of the second guide rods is fixedly connected with the support frame 8a, and the bottom end of the second guide rods is fixedly connected with the workbench 2;
the third rotary driver 8d is installed at the top end of the support frame 8a, and an output shaft is connected with the top end of the second lead screw 8b and used for driving the second lead screw 8b to rotate;
the central position of the lifting plate 8e is in threaded connection with the second lead screw 8b, and the two sides of the lifting plate are in clearance fit with the second guide rod 8c and are fixedly connected with the air injection mechanisms 7 so as to drive the plurality of air injection mechanisms 7 to lift;
butt joint seal assembly 8f, one end is installed on a tea seedling and is placed a 6 tops, and the other end is installed in air injection mechanism 7 and gives vent to anger end bottom for improve the leakproofness of air injection mechanism 7 and 5 butt joints of push mechanism.
The third rotary driver 8d is a servo motor electrically connected to the controller. The controller sends a signal to the third rotary driver 8d, and the third rotary driver 8d drives the second lead screw 8b to rotate after receiving the signal. Under the driving action of the second lead screw 8b and the limiting action of the second guide rod 8c, the second guide rod 8c drives the plurality of air injection mechanisms 7 to synchronously lift. The butt joint sealing component 8f improves the sealing performance of the butt joint, and reduces the leakage caused by ventilation in the tea seedling placing cylinder 6, thereby causing unnecessary energy waste.
As shown in fig. 9 and 10, the butt seal assembly 8f includes a first seal ring 8f1 and a second seal ring 8f 2;
the first sealing ring 8f1 is arranged at the top end of the tea seedling placing cylinder 6, and the upper end of the first sealing ring is provided with a female spigot;
and the second sealing ring 8f2 is arranged at the bottom of the air outlet end of the air injection mechanism 7, and the lower end of the second sealing ring is provided with a male spigot.
The sealing performance of the butt joint is improved by the mutual matching of the male and female spigots of the first sealing ring 8f1 and the second sealing ring 8f 2.
The working principle of the invention is as follows:
the device realizes the functions of the invention through the following steps, thereby solving the technical problems provided by the invention:
step one, tea seedlings with the same number as the tea seedling placing cylinders 6 are placed inside the tea seedling placing cylinders 6 by workers.
And step two, the worker integrally moves the tree planter to a working area through the moving mechanism.
And step three, the controller sends a signal to the lifting mechanism 1, and the lifting mechanism 1 drives the workbench 2 to descend after receiving the signal, so that the blanking pipe 3 is inserted into the ground with the excavating mechanism 4 below the blanking pipe 3.
And step four, the controller sends a signal to the excavating mechanism 4, and after the excavating mechanism 4 receives the signal, a plurality of working ends of the excavating mechanism work simultaneously to excavate the mountain land into a plurality of planting pits.
Step five, the controller sends a signal to the pushing mechanism 5, the pushing mechanism 5 simultaneously pushes a plurality of tea seedling placing cylinders 6 filled with tea seedlings to the direction of the feeding pipe 3 after receiving the signal, then the bottom ends of the tea seedling placing cylinders 6 are butted with the top end of the feeding pipe 3, the axes of the tea seedling placing cylinders are collinear, and the tea seedlings enter the feeding pipe 3 from the bottoms of the tea seedling placing cylinders 6 under the action of gravity and fall into the planting pits.
And step six, in order to avoid the blockage of the feeding pipe 3 and the tea seedling placing cylinder 6, which causes that the tea seedlings can not smoothly fall into the planting pits. The controller sends the signal and gives docking mechanism 8, and docking mechanism 8 receives the signal and drives a plurality of air jet mechanism 7 and place a section of thick bamboo 6 axial motion along the tea seedling, makes air jet mechanism 7 give vent to anger the end then and place a section of thick bamboo 6 top butt joint with the tea seedling, then places a section of thick bamboo 6 and unloading pipe 3 to the tea seedling and lets in the air current after the pressurization and spout the tea seedling from unloading pipe 3 bottom to planting in the hole.
And seventhly, after the work is finished, the controller sends signals to the docking mechanism 8 and the pushing mechanism 5 to reset the docking mechanism and the pushing mechanism. The pushing mechanism 5 drives the tea seedling placing barrel 6 to reset. The staff replenishes the tea seedlings in the tea seedling placing cylinder 6. Thus realizing the rapid planting of the tea trees in whole rows or columns.
The foregoing has described the general principles, principal features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A barren mountain tree planting machine for planting green tea trees is characterized by comprising a moving mechanism, a lifting mechanism (1), a workbench (2), a blanking pipe (3), an excavating mechanism (4), a pushing mechanism (5), a tea seedling placing barrel (6), an air injection mechanism (7) and a butt joint mechanism (8);
the moving mechanism is used for moving the whole tree planter;
the lifting mechanism (1) is arranged on the moving mechanism and used for controlling the lifting of the workbench (2);
the workbench (2) is arranged on the working end of the lifting mechanism (1) and is used for installing the blanking pipe (3), the excavating mechanism (4), the pushing mechanism (5) and the butt joint mechanism (8);
the plurality of discharging pipes (3) are fixedly arranged at the bottom of the workbench (2) and are uniformly distributed at intervals in the horizontal direction so as to send tea seedlings into the planting pits;
the digging mechanisms (4) are provided with a plurality of digging mechanisms, the number of the digging mechanisms corresponds to the number of the discharging pipes (3) one by one, and the digging mechanisms are rotatably arranged on the discharging pipes (3) and are used for digging planting pits in the mountainous region;
the pushing mechanism (5) is arranged on the workbench (2), and the output end of the pushing mechanism can move towards the axis of the discharging pipe (3) along the horizontal direction so as to push the tea seedling placing cylinder (6) towards the discharging pipe (3);
the tea seedling placing cylinders (6) are provided with a plurality of feeding pipes (3), the number of the feeding pipes corresponds to that of the feeding pipes one by one, the feeding pipes are communicated up and down and are arranged at the working end of the pushing mechanism (5), the bottoms of the feeding pipes are butted with the top ends of the feeding pipes (3) and are positioned on the same axis in a working state, and sliding blocks connected with the working table (2) in a sliding mode are arranged at the bottoms of the feeding pipes;
the air injection mechanisms (7) are provided with a plurality of air injection mechanisms, the number of the air injection mechanisms corresponds to that of the tea seedling placing cylinders (6), and the air outlet ends are arranged on the working ends of the butt joint mechanisms (8) and used for introducing pressurized air flow into the tea seedling placing cylinders (6);
docking mechanism (8), install on workstation (2), the setting of a section of thick bamboo (6) axis direction is placed along unloading pipe (3) and tea seedling to the work end direction of motion for place a section of thick bamboo (6) top butt joint with jet-propelled mechanism (7) and tea seedling.
2. The barren mountain tree planting machine for green tea tree planting according to claim 1, wherein the lifting mechanism (1) comprises a hanging frame (1 a), a first lead screw (1 b), a first guide rod (1 c), a first rotary driver (1 d) and a lifting seat (1 e);
a hanging frame (1 a) mounted on the moving mechanism;
the axis of the first lead screw (1 b) is vertically arranged, and two ends of the first lead screw are respectively and rotatably connected with the upper end and the lower end of the hanging frame (1 a);
the first guide rods (1 c) are provided with a pair of pairs and are symmetrically arranged at two sides of the first lead screw (1 b), the axis of the first guide rods is parallel to the axis of the first lead screw (1 b), and two ends of the first guide rods are fixedly connected with the upper end and the lower end of the hanging frame (1 a);
the first rotary driver (1 d) is arranged at the top end of the hanging frame (1 a), and an output shaft is connected with the top end of the first lead screw (1 b) and used for driving the first lead screw (1 b) to rotate;
the lifting seat (1 e) is in threaded connection with a first lead screw (1 b) in the central position, and two sides of the lifting seat are in clearance fit with the first guide rod (1 c) and used for installing the workbench (2).
3. The barren mountain tree planter for green tea tree planting according to claim 1, wherein the workbench (2) comprises a bottom plate (2 a), a vertical plate (2 b), a side plate (2 c) and a blanking through hole (2 d);
the bottom plate (2 a) is horizontally arranged, one side of the bottom plate is fixedly connected with the working end of the lifting mechanism (1), and the bottom of the bottom plate is fixedly connected with the top end of the excavating mechanism (4);
the vertical plate (2 b) is vertically arranged above one end, far away from the lifting mechanism (1), of the bottom plate (2 a) and used for installing the pushing mechanism (5);
the side plates (2 c) are provided with a pair, are symmetrically arranged on two sides of the bottom plate (2 a) in parallel and are vertically arranged, and are used for guiding the movement of the working end of the pushing mechanism (5);
the blanking through holes (2 d) are provided with a plurality of blanking through holes, are uniformly distributed on the bottom plate (2 a) at intervals and are fixedly connected with the blanking pipes (3) so as to allow the blanking pipes (3) to penetrate through the bottom plate (2 a).
4. The barren mountain tree planter for green tea tree planting according to claim 3, wherein the working table (2) is further provided with a first chute (2 e) and a second chute (2 f);
the first sliding chute (2 e) is arranged on the bottom plate (2 a), extends from the vertical plate (2 b) to the blanking through hole (2 d) and is used for guiding and limiting the tea seedling placing barrel (6);
and the second sliding groove (2 f) is formed in the inner side of the side plate (2 c), is in sliding connection with two sides of the working end of the pushing mechanism (5), and is used for guiding and limiting the movement of the working end of the pushing mechanism (5).
5. The barren mountain tree planter for green tea tree planting according to claim 1, wherein the digging mechanism (4) comprises a mounting frame (4 a), a worm and gear linkage assembly (4 b), a sleeve (4 c), a soil turning claw (4 d) and a first linear driver (4 e);
the mounting rack (4 a) is mounted at the bottom of the workbench (2);
the worm and gear linkage assembly (4 b) is horizontally arranged, two ends of the worm and gear linkage assembly are rotatably connected with two sides of the mounting rack (4 a), and the output end of the worm and gear linkage assembly is sleeved with the plurality of sleeves (4 c) and used for synchronously driving the plurality of sleeves (4 c) to rotate;
the sleeve (4 c) is rotatably arranged on the blanking pipe (3) and is positioned below the mounting frame (4 a), and a plurality of hinge lugs are uniformly distributed on the outer walls of the upper end and the lower end;
the soil turning claws (4 d) are provided with a plurality of soil turning claws which are uniformly distributed around the axis of the worm gear linkage assembly (4 b), can be mutually folded or separated, and are provided with a pair of hinge seats which are respectively hinged with the hinge lugs at the bottom end of the sleeve (4 c) and a hinge seat which is hinged with the output end of the first linear driver (4 e);
the first linear driver (4 e) is hinged with a hinge lug at the upper end of the sleeve (4 c), and the output end of the first linear driver is hinged with the soil turning claw (4 d).
6. The barren mountain tree planter for green tea tree planting according to claim 5, wherein the worm gear and worm linkage assembly (4 b) comprises a worm (4 b 1), a worm gear (4 b 2) and a second rotary driver (4 b 3);
the worm (4 b 1) is provided with a plurality of worms which are connected end to end and have collinear axes, and the two ends of the worm are rotatably connected with the two sides of the mounting rack (4 a) so as to drive a plurality of worm wheels (4 b 2) to rotate simultaneously;
a plurality of worm wheels (4 b 2) which correspond to the worms (4 b 1) in number and are sleeved on the sleeve (4 c) to drive the sleeve (4 c) to rotate;
and the second rotary driver (4 b 3) is arranged on the mounting frame (4 a), and the output shaft is connected with the end part of the worm (4 b 1) and used for driving the plurality of worms (4 b 1) to rotate simultaneously.
7. The barren mountain tree planter for green tea tree planting according to claim 1, wherein the pushing mechanism (5) comprises a pushing plate (5 a) and a second linear driver (5 b);
the end surface of the material pushing plate (5 a) is vertical to the bottom of the workbench (2), and the material pushing plate can be horizontally arranged on the workbench (2) in a displacement manner and is used for driving the tea seedling placing cylinders (6) to move towards the blanking pipe (3);
the second linear driver (5 b) is arranged on the workbench (2), and the motion direction of the output shaft is horizontally arranged and fixedly connected with the material pushing plate (5 a) for controlling the horizontal displacement of the material pushing plate (5 a).
8. The barren mountain tree planting machine for green tea tree planting according to claim 1, wherein the air injection mechanism (7) comprises an air inlet pipe (7 a), a flexible connecting pipe (7 b) and an air pump;
the air inlet pipes (7 a) are provided with a plurality of air inlet pipes, the number of the air inlet pipes corresponds to that of the tea seedling placing cylinders (6) one by one, the air inlet pipes are of bent structures and are fixed on the working ends of the butting mechanisms (8), and the air outlet ends are collinear with the axes of the tea seedling placing cylinders (6) in a working state;
the flexible connecting pipe (7 b) is arranged on the air inlet end of the air inlet pipe (7 a), and the other end of the flexible connecting pipe is connected with the air pump;
and an air pump mounted on the moving mechanism for introducing the pressurized air flow into the flexible connecting pipe (7 b).
9. The barren mountain tree planting machine for green tea tree planting according to claim 1, wherein the docking mechanism (8) comprises a support frame (8 a), a second lead screw (8 b), a second guide rod (8 c), a third rotary driver (8 d), a lifting plate (8 e) and a docking sealing assembly (8 f);
a support frame (8 a) which is erected at the upper end of the workbench (2);
the axis of the second lead screw (8 b) is vertically arranged, the top end of the second lead screw is rotationally connected with the support frame (8 a), and the bottom end of the second lead screw is rotationally connected with the workbench (2);
the second guide rods (8 c) are provided with a pair of pairs and are symmetrically arranged at two sides of the second lead screw (8 b), the axes of the second guide rods are parallel to the axis of the second lead screw (8 b), the top ends of the second guide rods are fixedly connected with the support frame (8 a), and the bottom ends of the second guide rods are fixedly connected with the workbench (2);
the third rotary driver (8 d) is arranged at the top end of the support frame (8 a), and an output shaft is connected with the top end of the second lead screw (8 b) and used for driving the second lead screw (8 b) to rotate;
the central position of the lifting plate (8 e) is in threaded connection with the second lead screw (8 b), and the two sides of the lifting plate are in clearance fit with the second guide rod (8 c) and are fixedly connected with the air injection mechanisms (7) so as to drive the plurality of air injection mechanisms (7) to lift;
butt joint seal assembly (8 f), one end is installed and is placed a section of thick bamboo (6) top at the tea seedling, and the other end is installed and is given vent to anger end bottom in air injection mechanism (7) for improve the leakproofness of air injection mechanism (7) and push mechanism (5) butt joint.
10. The machine for planting barren mountains and trees on green tea trees according to claim 9, wherein the butt seal assembly (8 f) comprises a first seal ring (8 f 1) and a second seal ring (8 f 2);
the first sealing ring (8 f 1) is arranged at the top end of the tea seedling placing cylinder (6), and the upper end of the first sealing ring is provided with a female spigot;
and the second sealing ring (8 f 2) is arranged at the bottom of the air outlet end of the air injection mechanism (7), and the lower end of the second sealing ring is provided with a male spigot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011426682.4A CN112493081A (en) | 2020-12-09 | 2020-12-09 | A barren mountain tree planting machine for green tea tree is planted |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011426682.4A CN112493081A (en) | 2020-12-09 | 2020-12-09 | A barren mountain tree planting machine for green tea tree is planted |
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| Publication Number | Publication Date |
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| CN112493081A true CN112493081A (en) | 2021-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011426682.4A Withdrawn CN112493081A (en) | 2020-12-09 | 2020-12-09 | A barren mountain tree planting machine for green tea tree is planted |
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| CN (1) | CN112493081A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113728852A (en) * | 2021-10-14 | 2021-12-03 | 安徽省农业科学院茶叶研究所 | Tea seedling pruning, storing and cultivating device |
| CN114051902A (en) * | 2021-12-22 | 2022-02-18 | 安徽德昌苗木有限公司 | Tea tree transplanting equipment |
-
2020
- 2020-12-09 CN CN202011426682.4A patent/CN112493081A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113728852A (en) * | 2021-10-14 | 2021-12-03 | 安徽省农业科学院茶叶研究所 | Tea seedling pruning, storing and cultivating device |
| CN113728852B (en) * | 2021-10-14 | 2023-12-12 | 安徽省农业科学院茶叶研究所 | Tea seedling pruning, preserving and cultivating device |
| CN114051902A (en) * | 2021-12-22 | 2022-02-18 | 安徽德昌苗木有限公司 | Tea tree transplanting equipment |
| CN114051902B (en) * | 2021-12-22 | 2023-03-14 | 安徽德昌苗木有限公司 | Tea tree transplanting equipment |
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Application publication date: 20210316 |
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