Hollow rotary drill bit based on controllable sharp nozzle

Abstract

The utility model relates to the technical field of hollow rotary drill bits, in particular to a hollow rotary drill bit based on a controllable sharp nozzle, which comprises a drill bit body, a drill bit top collision block arranged on the surface of the top end of the drill bit body, a linkage platform limiting piece arranged on the inner side of the middle of the drill bit top collision block, and a pull rod top circular ring arranged on the surface of the middle of the inner side of the drill bit top collision block. A spiral hollow drill is arranged in the middle of the surface of the bottom end of the drill bit jacking block, a drill bit sharp mouth end is arranged on the surface of the bottom end of the spiral hollow drill, and a linkage pull rod is arranged on the surface of one side of the drill bit jacking block. The problem that a traditional method that a drill bit cannot be used for digging holes, placing seedlings and covering soil normally due to dry sand sinking during planting in the dry sand land is effectively solved, the function of planting long-strip-shaped crops such as saplings in the dry sand land is achieved through the hollow drill bit, and the whole device has the advantages of being high in stability, controllability, adaptability and transportability, simple in structure and easy to produce in batch.

Description

Technical Field

[0001] The utility model relates to the technical field of hollow rotary drill bits, in particular to a hollow rotary drill bit based on a controllable sharp mouth. Background Art

[0002] Patent CN208353894U registered by Inner Mongolia Kubuqi Desert Technology Research Institute uses the "minimally invasive airflow tree planting method" to partially wet the dry sand through a water pipe to achieve a muddy texture. After pulling out the water pipe, the sapling is inserted into the wetted muddy sand. The whole process takes several minutes and consumes a lot of water.

[0003] At present, the difficulty of planting in dry sandy land is mainly due to the problem of dry sand sinking. After drilling dry sand with an ordinary drill bit, the original hole is difficult to maintain and will almost collapse when the drill bit is removed. To solve this problem, some planting carts that have applied for patents have proposed a method of first watering the dry sand to solidify it and then drilling holes. The stability of wet sand is used to avoid the problem of dry sand collapse, but the water requirement for irrigation is large and the immersion time is long, so the planting speed and endurance cannot be guaranteed, and the subsequent filling process is added, which increases the complexity of the process.

[0004] Another solution is to use a hollow drill bit, such as the spiral drill bit used in patent CN114258834A, which can use the friction of the sand to unscrew the end of the drill bit when the drill bit rotates after falling, so as to remove the drill bit while leaving the sapling in the sand pit. This method has high requirements for the friction of the sand, requires sand to unscrew the sharp mouth, has poor stability, and has high requirements for the environment.

[0005] Patent CN114946582A proposes another hollow drill bit, which uses connecting rods, springs and wire ropes to achieve the design of the hollow drill bit. However, the overall mechanism is relatively complicated, and the use of spring reset has the risk of failure. The reset device and the linkage structure occupy the hollow internal space, and the hollow tube is difficult to reduce to a smaller outer diameter. The drilling depth is shallower under the same power, and the hollow drill bit in the integrated mechanism needs to cooperate with other parts, which is difficult to be used as a separate component, and the scalability is poor. Utility Model Content

[0006] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a hollow rotary drill bit based on a controllable pointed mouth, aiming to solve the technical problems of the prior art that the stability is poor, the environment has high requirements and the coordination with other parts is difficult to be used as a separate component, and the scalability is poor.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0008] The utility model discloses a hollow rotary drill based on a controllable pointed mouth, comprising a drill body, a drill top collision block is arranged on the top surface of the drill body, a linkage platform limiter is arranged on the inner side of the middle part of the drill top collision block, a pull rod top ring is arranged on the inner middle surface of the drill top collision block, a spiral hollow drill is arranged in the middle of the bottom surface of the drill top collision block, a drill pointed mouth end is arranged on the bottom surface of the spiral hollow drill, a linkage pull rod is arranged on one side surface of the drill top collision block, an outer hinge is arranged on one side surface of the connection between the spiral hollow drill and the drill pointed mouth end, and an inner upper hinge and an inner lower hinge are respectively arranged inside the connection between the spiral hollow drill and the drill pointed mouth end.

[0009] The top surface of the linkage platform limiting member is provided with a linkage platform top pin groove, the bottom surface of the drill head top bump block is provided with a linkage platform bottom pin groove, the bottom end of the linkage platform top pin groove is respectively provided with a bump block outer pin hole, a bump block inner pin hole and a pulley outer wire hole, the bottom end of the pulley outer wire hole is provided with a pulley inner wire hole, a fixed through hole is provided in the middle of the top surface of the linkage platform limiting member, and the bottom end of the linkage platform limiting member is respectively provided with a pulley wire groove, a platform outer pin hole and a platform inner pin hole.

[0010] The surface of one side of the top circular ring of the pull rod is sequentially provided with a linkage platform top cylindrical pin and a linkage platform bottom cylindrical pin from top to bottom, and a linkage cable is provided on the surface of one side of the top cylindrical pin of the linkage platform. The drill bit top bump block and the middle of the surface of one side of the top circular ring of the pull rod are respectively provided with a bump block positioning aluminum sleeve and a ring positioning aluminum sleeve, and the top and bottom end surfaces of the drill bit top bump block are respectively provided with a left upper limit block, a right upper limit block, a left lower limit block and a right lower limit block.

[0011] As a further description of the above technical solution:

[0012] The drill body is arranged in a T shape, the drill head top collision block and the linkage platform limiter are fixedly connected, and the linkage platform limiters are arranged in a plurality and arranged in sequence in an arc shape.

[0013] As a further description of the above technical solution:

[0014] The drill bit top block and the spiral hollow drill are fixedly connected, and a spiral threaded part is arranged on the surface of the spiral hollow drill. The spiral hollow drill and the drill bit tip end are connected and fixed by an outer hinge, an upper hinge and an inner lower hinge.

[0015] As a further description of the above technical solution:

[0016] The pull rod top ring is arranged in multiple configurations and arranged in sequence between the two linkage platform limiters. The bump block outer pin hole and the bump block inner pin hole are circular holes and are arranged in sequence in a horizontal shape.

[0017] As a further description of the above technical solution:

[0018] The outer pin hole and the inner pin hole of the bump block are arranged correspondingly to the outer pin hole and the inner pin hole of the platform, and the left upper limit block and the right upper limit block are symmetrically arranged with the left lower limit block and the right lower limit block.

[0019] The utility model has the following beneficial effects:

[0020] In the utility model, the tip part of the hollow drill bit which is difficult to control electrically is controlled by mechanical cooperation, which effectively solves the barrier of traditional methods of digging holes, planting seedlings and covering soil with drill bits due to the sinking of dry sand when planting in dry sand. The hollow drill bit is used to plant long crops such as seedlings in dry sand, making the whole device stable, manipulable, adaptable and portable, and simple in structure to facilitate mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 It is a front view schematic diagram of the hollow drill bit of the utility model;

[0024] Figure 3 It is a schematic cross-sectional view of the hollow drill bit of the utility model from the left side;

[0025] Figure 4 It is a left-side cross-sectional schematic diagram of the hollow drill bit of the utility model after removing the spiral hollow drill;

[0026] Figure 5 It is a left-side cross-sectional schematic diagram of the hollow drill bit of the utility model after removing the spiral hollow drill;

[0027] Figure 6 It is a top view schematic diagram of the linkage reversing mechanism of the utility model;

[0028] Figure 7 It is a bottom view schematic diagram of the linkage reversing mechanism of the utility model;

[0029] Figure 8 It is a schematic diagram of the internal linkage logic pulley mechanism of the linkage reversing mechanism of the utility model;

[0030] Fig. 9 It is a schematic diagram of the operation logic of the mechanical limit module of the utility model;

[0031] In the figure: 1, drill body; 101, drill top bump block; 102, linkage platform stopper; 103, pull rod top ring; 104, spiral hollow drill; 105, drill tip end; 201, linkage pull rod; 202, outer hinge; 301, inner upper hinge; 302, inner lower hinge; 501, linkage platform top pin groove; 502, linkage platform bottom pin groove; 503, bump block outer pin hole; 504, bump block inner pin hole; 505, slide Wheel outer line hole; 506, pulley inner line hole; 601, fixed through hole; 701, pulley line groove; 702, platform outer pin hole; 703, platform inner pin hole; 801, linkage platform top cylindrical pin; 802, linkage platform bottom cylindrical pin; 803, linkage cable; 804, bump block positioning aluminum sleeve; 805, ring positioning aluminum sleeve; 901, left upper limit block; 902, right upper limit block; 903, left lower limit block; 904, right lower limit block. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0033] In the drawings, the same reference numerals all refer to the same components.

[0034] Example 1

[0035] Reference Figure 1-9 The utility model provides an embodiment: a hollow rotary drill based on a controllable pointed mouth, comprising a drill body 1, a drill top collision block 101 is arranged on the top surface of the drill body 1, a linkage platform limiter 102 is arranged on the inner side of the middle part of the drill top collision block 101, a pull rod top ring 103 is arranged on the inner middle surface of the drill top collision block 101, a spiral hollow drill 104 is arranged in the middle of the bottom surface of the drill top collision block 101, a drill pointed mouth end 105 is arranged on the bottom surface of the spiral hollow drill 104, a linkage pull rod 201 is arranged on one side surface of the drill top collision block 101, an outer hinge 202 is arranged on one side surface of the connection between the spiral hollow drill 104 and the drill pointed mouth end 105, and an inner upper hinge 301 and an inner lower hinge 302 are respectively arranged inside the connection between the spiral hollow drill 104 and the drill pointed mouth end 105.

[0036] A linkage platform top pin groove 501 is arranged on the top surface of the linkage platform limiting member 102, a linkage platform bottom pin groove 502 is arranged on the bottom surface of the drill head top bump block 101, a bump block outer pin hole 503, a bump block inner pin hole 504 and a pulley outer line hole 505 are arranged at the bottom of the linkage platform top pin groove 501, a pulley inner line hole 506 is arranged at the bottom of the pulley outer line hole 505, a fixed through hole 601 is arranged in the middle of the top surface of the linkage platform limiting member 102, and a pulley line groove 701, a platform outer pin hole 702 and a platform inner pin hole 703 are arranged at the bottom of the linkage platform limiting member 102.

[0037] The surface of one side of the pull rod top ring 103 is sequentially provided with a linkage platform top cylindrical pin 801 and a linkage platform bottom cylindrical pin 802 from top to bottom, and a linkage cable 803 is provided on the surface of the linkage platform top cylindrical pin 801. The drill bit top bump block 101 and the middle of the surface of one side of the pull rod top ring 103 are respectively provided with a bump block positioning aluminum sleeve 804 and a ring positioning aluminum sleeve 805. The top and bottom surfaces of the drill bit top bump block 101 are respectively provided with a left upper limit block 901, a right upper limit block 902, a left lower limit block 903 and a right lower limit block 904.

[0038] The drill body 1 is T-shaped, the drill top block 101 and the linkage platform limiter 102 are fixedly connected, and the linkage platform limiters 102 are multiple and arranged in sequence in an arc shape.

[0039] The drill head block 101 and the spiral hollow drill 104 are fixedly connected, and a spiral threaded part is arranged on the surface of the spiral hollow drill 104 . The spiral hollow drill 104 and the drill head tip 105 are connected and fixed by an outer hinge 202 , an upper hinge and an inner lower hinge 302 .

[0040] The pull rod top ring 103 is arranged in multiple configurations and arranged in sequence between the two linkage platform limiters 102. The bump block outer pin hole 503 and the bump block inner pin hole 504 are circular holes and are arranged in sequence in a horizontal shape.

[0041] The outer pin hole 503 and the inner pin hole 504 of the bump block are arranged correspondingly to the outer pin hole 702 and the inner pin hole 703 of the platform, and the left upper limit block 901 and the right upper limit block 902 are symmetrically arranged with the left lower limit block 903 and the right lower limit block 904.

[0042] Specifically, the structure comprises a drill body 1, a drill top bump block 101, a linkage platform stopper 102, a pull rod top ring 103, a spiral hollow drill 104, a drill tip end 105, a linkage pull rod 201, an outer hinge 202, an inner upper hinge 301, an inner lower hinge 302, a linkage platform top pin groove 501, a linkage platform bottom pin groove 502, a bump block outer pin hole 503, a bump block inner pin hole 504, a pulley outer line hole 505, and a pulley inner line hole 506. 6. The fixing through hole 601, the pulley line groove 701, the platform outer pin hole 702, the platform inner pin hole 703, the linkage platform top cylindrical pin 801, the linkage platform bottom cylindrical pin 802, the linkage cable 803, the bump block positioning aluminum sleeve 804, the ring positioning aluminum sleeve 805, the left upper limit block 901, the right upper limit block 902, the left lower limit block 903 and the right lower limit block 904 form a hollow rotary drill based on a controllable pointed nozzle, and the hollow rotary drill based on the controllable pointed nozzle A pulley mechanism is used to change the movement direction of the mechanical limiting component, so that the drill bit can be applied to planting machinery. A passive mechanical limiting method is used. The lifting and lowering of the drill bit mechanism is realized simultaneously only through the lifting and lowering control system of the drill bit structure. When the drill bit moves to the top, the tip is transmitted from open to closed after passing through the limiting device. When the drill bit moves to the bottom, the tip is transmitted from closed to open after passing through the limiting device. The rotation of the drill bit tip is transmitted to the top platform of the hollow drill bit through the connecting rod mechanism, so that after the overall drill bit drills into the sand, the top element is mechanically limited or moved to achieve the effect of opening the tip and causing the seedlings in the hollow cavity to fall. The internal lifting mechanism is coordinated with the external limiting mechanism through the pulley mechanism to achieve the opposite movement direction of the external limiting mechanism and the internal lifting mechanism, so that the hollow drill bit can achieve the effect of opening and closing the drill bit tip at the corresponding position by relying solely on the lifting control mechanism through the passive mechanical limiting method.

[0043] This embodiment is a mechanical linkage type hollow drill, which consists of two parts: Figure 1 As shown, one is the spiral hollow drill 104, and the other is the linkage structure of the top connector and the internal control drill opening and closing. The opening and closing of the drill tip end 105 is controlled by a connecting rod mechanism composed of an inner upper hinge 301 and an inner lower hinge 302. The hinge mechanism is connected to three linkage pull rods 201, and the three thin linkage pull rods 201 are fixed to the pull rod top ring 103. The pull rod top ring 103 and the drill head top bump block 101 are linked through a pulley structure. Through the interference of the external fixed limit block and the slider, when reaching the top, the slider slides down completely and the drill mouth is closed; when reaching the bottom, the slider drops completely and the drill mouth is opened, so as to realize the opening and closing of the drill mouth, thereby causing the seedling to fall.

[0044] The main structure of the hollow rotary drill based on the controllable tip is composed of an external spiral hollow drill 104, a drill tip end 105, and a linkage platform 102. The outer side of the spiral hollow drill 104 is a spiral blade structure commonly seen in drills, and there is a through-hole tubular space in the middle. The drill tip part is composed of three mutually axially symmetrical drill tip ends 105. The drill tip end 105 is connected to hinges on both the inner and outer sides respectively, and the outer side is fixedly connected to the outer hinge 202, and the other side of the outer hinge 202 is fixed to the outer side of the bottom of the spiral hollow drill 104; the inner side of the drill tip end 105 is fixedly connected to the inner lower hinge 301, and the other side of the inner lower hinge 301 is fixedly connected to the inner upper hinge 301, and the other side of the inner upper hinge 301 is fixedly connected to the linkage pull rod 201. The hinge replaces the connecting rod mechanism to realize the function of the connecting rod mechanism in a narrow space.

[0045] After the drill bit tip end 105 is fixedly connected to the outer hinge 202, it can rotate around the axis of the outer hinge 202. The drill bit tip end 105, the inner upper hinge 301 and the inner lower hinge 302 and the linkage rod 201 together form a double-link mechanism, and the axis of the two inner hinges is used as the hinge of the connecting rod. When the linkage rod 201 rises, it can drive the hinge between the inner upper hinge 301 and the inner lower hinge 302 to rise, thereby driving the drill bit tip end 105 to rotate toward the hollow pipe inside the axis of the spiral hollow drill 104; when the linkage rod 201 descends, it can drive the hinge between the inner lower hinge 301 and the inner upper hinge 302 to descend, thereby driving the drill bit tip end 105 to rotate toward the outside of the spiral hollow drill 104.

[0046] The above is the coordination relationship between the drill tip end 105 and the linkage rod 201, which completes the linkage between the tip and the top platform of the drill. In actual use, since the spiral hollow drill 104 is a rotating machine, the control of its internal rod is difficult to achieve through circuit control. At present, there are many "hollow slip rings" that realize the circuit connection of hollow rotating parts, but they all have relatively small inner and outer diameters, high space occupation and other problems. In addition, when using this solution, a motor needs to be installed inside the hollow drill, which further occupies the internal space.

[0047] like Figure 5 As shown, a mechanical coordination method is adopted to realize the control of the inside of the rotating space, and the linkage rod 201 is fixed to the rod top ring 103 by fasteners, so that the three axisymmetric drill bit tips 105, the three linkage rods 201 matched with the drill bit tips 105, and the rod top ring 103 form a coordinated relationship of synchronous movement, and the rise and fall of the rod top ring 103 corresponds to the rise and fall of the three linkage rods 201, and at the same time corresponds to the closing and opening of the three axisymmetric drill bit tips 105. Therefore, when the rod top ring 103 rises, the three axisymmetric drill bit tips 105 are closed at the same time; when the rod top ring 103 falls, the three axisymmetric drill bit tips 105 are opened at the same time.

[0048] like Figure 6 As shown, the pull rod top ring 103 is cut from a plate, and its annular inner ring can only rise or fall under the limit of the linkage platform limiter 102. The pull rod top ring 103 rotates synchronously with the spiral hollow drill 104. When the outside uses a mechanical limit to push the pull rod top ring 103 downward or upward, the opening and closing of the three axisymmetric drill tip ends 105 can be controlled, so that the drill tip end 105 remains closed to prevent sand from invading when the drill bit drills downward, and the drill tip end 105 opens when the drill bit is lifted upward to make the saplings stored in the hollow cavity of the spiral hollow drill 104 fall, and at the same time, the dry sand that sinks back on the outside of the spiral hollow drill 104 covers the saplings that fall from the hollow cavity, completing the drilling-seedling drop-soil covering operation. The above is the basic control logic of the hollow rotary drill based on the controllable tip. When the hollow rotary drill based on the controllable tip is used in automatic planting machinery such as an automatic planting trolley, in order to reduce the number of parameter variables and electronic control equipment, the hollow rotary drill based on the controllable tip is added with the following on the basis of the basic control logic: Figure 5-8 The linkage function of the linkage platform shown in the figure, as well as Fig. 9 The mechanical limit function shown.

[0049] Since the drill bit as a whole rises and falls relative to the whole machine during the operation of the automatic planting machine, the pull rod top ring 103 can be limited by the limiting device of the drill bit as a whole, so as to control the opening and closing of the drill bit tip end 105, as shown in the attached Fig. 9 As shown, however, in the mechanical limit, it is necessary to consider that the left upper limit block 901 and the right upper limit block 902 are fixedly connected to the top of the frame where the drill bit is located, and the left lower limit block 903 and the right lower limit block 904 are fixedly connected to the bottom of the frame where the drill bit is located. Therefore, through the rise of the spiral hollow drill 104, when it rises to the top, the upper top surface of the drill head top impact block 101 contacts with the left upper limit block 901 and the right upper limit block 902 fixed on the top of the frame where the drill bit is located. When the drill bit continues to rise, the drill head top impact block 101 drops relative to the linkage platform limit piece 102. If the drill bit top impact block 101 is directly fixed or integrated with the pull rod top ring 103, then when the spiral hollow drill 104 rises to the top, the corresponding pull rod top ring 103 will descend relative to the spiral hollow drill 104, so that the drill bit tip end 105 will open. Thereafter, as the drill bit tip end 105 opens to the limit position, the spiral hollow drill 104 stops rising and starts a series of steps of drilling downward and the sapling falls into the hollow cavity of the spiral hollow drill 104. However, during this process, the corresponding drill bit tip end 105 is in an open state and cannot perform normal drilling operations.

[0050] As the spiral hollow drill 104 descends, the lower bottom surface of the drill head top collision block 101 contacts the lower left limit block 903 and the lower right limit block 904 fixed at the bottom of the frame where the drill head is located when the drill head descends to the bottom. When the drill head continues to descend, the drill head top collision block 101 rises relative to the linkage platform limiter 102. If the drill head top collision block 101 is directly fixed or integrated with the pull rod top circular ring 103, then when the spiral hollow drill 104 descends to the bottom, the corresponding pull rod top circular ring 103 rises relative to the spiral hollow drill 104, so that the drill head tip end 105 is closed, and then as the drill head tip end 105 is closed to the limit position, the spiral hollow drill 104 stops descending. However, this requires the drill head tip end 105 to be opened from a closed state to an open state to drop the sapling stored in the hollow cavity of the spiral hollow drill 104.

[0051] The above logic is inconsistent with the seedling step of the hollow drill bit, and is exactly the opposite. Therefore, in this embodiment, the drill head top collision block 101 and the pull rod top ring 103 are not fixed or integrated, but are used as shown in the attached figure. Figure 8 The pulley mechanism shown in the figure, in which the two rectangles represent the drill bit top contact block 101 and the pull rod top ring 103, according to the above process, the passive limit needs to realize the function that the drill bit tip end 105 changes from open to closed after the spiral hollow drill 104 rises to the top and touches the left upper limit block 901 and the right upper limit block 902, and the drill bit tip end 105 changes from closed to open after the spiral hollow drill 104 descends to the bottom and touches the left lower limit block 903 and the right lower limit block 904, thereby realizing the closed-loop planting process of the drill bit drilling downward, the sapling falling into the hollow cavity of the drill bit from above, the tip opening after running to the bottom, the sapling stored in the hollow cavity falling, the drill bit lifting upward, and the tip opening after running to the top.

[0052] like Figure 8 As shown, in the pulley mechanism, the linkage cable 803 passes through the pulley outer line hole 505 in the drill head top collision block 101 and the pulley inner line hole 506 in the pull rod top circular ring 103, and the drill head top collision block 101 and the pull rod top circular ring 103 are fixedly connected with the linkage cable 803 through the collision block positioning aluminum sleeves 804 located at the top and bottom of the pulley outer line hole 505 in the drill head top collision block 101 and the circular ring positioning aluminum sleeves 805 located at the top and bottom of the pulley inner line hole 506 in the pull rod top circular ring 103, so that there is no relative movement such as slippage between the linkage cable 803 and the drill head top collision block 101, and between the linkage cable 803 and the pull rod top circular ring 103. The linkage cable 803 bypasses the linkage platform top cylindrical pin 801 and the linkage platform bottom cylindrical pin 802 to form a closed-loop pulley block structure, so as to achieve reverse linkage when the drill head top collision block 101 moves downward and the pull rod top circular ring 103 moves upward.

[0053] In order to stably realize the above functions, the freedom of the drill head collision block 101 should be limited to only being able to move up and down, such as Figure 5-7As shown, the drill head top collision block 101 has three groups of axially symmetrical positioning pin holes, each group consists of an outer pin hole 503 of the collision block and an inner pin hole 504 of the collision block. There are also three groups of positioning pin holes at corresponding positions at the bottom of the linkage platform limiter 102, the outer pin hole 702 of the platform and the inner pin hole 701 of the platform. Under the positioning of the cylindrical pin, the drill head top collision block 101 can only move up and down along the cylindrical pin in the cylindrical pin hole.

[0054] In order to stably realize the above linkage function, the top cylindrical pin 801 of the linkage platform and the bottom cylindrical pin 802 of the linkage platform need to be accurately fixed, so Figure 5 The linkage platform top pin groove 501 and the linkage platform bottom pin groove 502 shown in the figure are used for the installation and positioning of the linkage platform top cylindrical pin 801 and the linkage platform bottom cylindrical pin 802. Figure 7 As shown in , the groove position of the linkage cable 803 passing through the bottom cylindrical pin 802 of the linkage platform is fixed in the pulley groove 701 at the bottom of the linkage platform limiter 102, thereby realizing the function of the pulley mechanism of the overall linkage.

[0055] Working principle: At the initial moment, the three drill bit tips 105 are in a closed state, the spiral hollow drill 104 drills downward, and the sapling falls into the hollow cavity of the drill bit from above. The spiral hollow drill 104 descends to the bottom, and after the drill bit top collision block 101 touches the lower left limit block 903 and the lower right limit block 904, the drill bit top collision block 101 is limited and moves upward relative to the spiral hollow drill 104. After the movement direction is changed by the linkage cable 803, the drill bit top collision block 101 drives the pull rod top ring 103 to move downward relative to the spiral hollow drill 104, thereby pushing the three drill bit tips 105 to open synchronously to the limit position under the transmission of the linkage pull rod 201 and the inner hinges 301302, and at the same time, the spiral hollow drill 104 descends to the limit position; the spiral hollow drill 104 is lifted upward, and the spiral The saplings stored in the hollow cavity of the spiral hollow drill 104 fall down, and the spiral hollow drill 104 continues to run to the top. After the drill head top impact block 101 touches the left upper limit block 901 and the right upper limit block 902, the drill head top impact block 101 is limited and moves downward relative to the spiral hollow drill 104. After the movement direction is changed by the linkage cable 803, the drill head top impact block 101 drives the pull rod top ring 103 to move upward relative to the spiral hollow drill 104, thereby pulling the three drill head tip ends 105 to synchronously close to the extreme position - the fully closed state under the transmission of the linkage pull rod 201 and the inner upper hinge 301 and the inner lower hinge 302. At the same time, the spiral hollow drill 104 rises to the extreme position, and the spiral hollow drill 104 starts to descend and drill, and repeats step 2 to complete the closed-loop planting process.

[0056] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A hollow rotary drill bit based on a controllable tip, comprising a drill bit body (1), characterized in that: The top surface of the drill body (1) is provided with a drill head bump block (101), the inner side of the middle of the drill head bump block (101) is provided with a linkage platform limiter (102), the inner middle surface of the drill head bump block (101) is provided with a pull rod top ring (103), the middle of the bottom surface of the drill head bump block (101) is provided with a spiral hollow drill (104), the bottom surface of the spiral hollow drill (104) is provided with a drill head tip end (105), a linkage pull rod (201) is provided on one side surface of the drill head bump block (101), an outer hinge (202) is provided on one side surface of the connection between the spiral hollow drill (104) and the drill head tip end (105), and an inner upper hinge (301) and an inner lower hinge (302) are respectively provided inside the connection between the spiral hollow drill (104) and the drill head tip end (105); The top surface of the linkage platform limiting member (102) is provided with a linkage platform top pin groove (501), the bottom surface of the drill head top bump block (101) is provided with a linkage platform bottom pin groove (502), the bottom of the linkage platform top pin groove (501) is respectively provided with a bump block outer pin hole (503), a bump block inner pin hole (504) and a pulley outer line hole (505), the bottom of the pulley outer line hole (505) is provided with a pulley inner line hole (506), the middle of the top surface of the linkage platform limiting member (102) is provided with a fixing through hole (601), and the bottom of the linkage platform limiting member (102) is respectively provided with a pulley line groove (701), a platform outer pin hole (702) and a platform inner pin hole (703); The surface of one side of the pull rod top circular ring (103) is provided with a linkage platform top cylindrical pin (801) and a linkage platform bottom cylindrical pin (802) in sequence from top to bottom, and the surface of one side of the linkage platform top cylindrical pin (801) is provided with a linkage cable (803). The middle of the surface of one side of the drill head top collision block (101) and the pull rod top circular ring (103) are respectively provided with a collision block positioning aluminum sleeve (804) and a circular ring positioning aluminum sleeve (805). The top and bottom surfaces of the drill head top collision block (101) are respectively provided with a left upper limit block (901), a right upper limit block (902), a left lower limit block (903) and a right lower limit block (904).

2. A hollow rotary drill bit based on a controllable tip according to claim 1, characterized in that: The drill body (1) is arranged in a T-shape, the drill head bump block (101) and the linkage platform limiter (102) are fixedly connected, and the linkage platform limiter (102) is arranged in a plurality and arranged in sequence in an arc shape.

3. A hollow rotary drill bit based on a controllable tip according to claim 1, characterized in that: The drill head collision block (101) and the spiral hollow drill (104) are fixedly connected, and a spiral threaded part is arranged on the surface of the spiral hollow drill (104). The spiral hollow drill (104) and the drill head tip end (105) are connected and fixed by an outer hinge (202), an upper hinge and an inner lower hinge (302).

4. A hollow rotary drill bit based on a controllable tip according to claim 1, characterized in that: The pull rod top ring (103) is arranged in multiple pieces and arranged in sequence between the two linkage platform limiters (102); the bump block outer pin hole (503) and the bump block inner pin hole (504) are circular holes and are arranged in sequence in a horizontal shape.

5. A hollow rotary drill bit based on a controllable tip according to claim 1, characterized in that: The outer pin hole (503) and the inner pin hole (504) of the bump block are arranged correspondingly to the outer pin hole (702) and the inner pin hole (703) of the platform, and the left upper limit block (901) and the right upper limit block (902) are arranged symmetrically to the left lower limit block (903) and the right lower limit block (904).

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