Tree growth cone

Abstract

The utility model discloses a tree growth cone, which relates to the technical field of forestry sampling, and comprises a drilling pipe, a drilling head, a supporting pipe, an indicating rod, a large gear, a small gear, a motor and other main components, and through the combination of electric control and manual control, the tree growth cone can stably operate under the condition of sufficient electric power or insufficient electric power. In the electric mode, the motor drives the gear system to achieve efficient drilling, and the working efficiency is remarkably improved. In the manual mode, extra power support is provided through a hand wheel and a drilling handle, and it is ensured that drilling operation can still be conducted when the electric quantity is insufficient or high-hardness trees exist. The drilling depth is displayed in real time through the supporting sliding block and the indicating rod, and the accuracy of the drilling process is ensured. And through the design of the chip groove and the observation groove, wood chips can be effectively removed, the state of the drilling head can be visually seen, and the operation stability is improved. In addition, the threaded connection between the drilling head and the drilling pipe is convenient to replace, and the service life of equipment is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of forestry sampling, in particular to a tree growth cone. BACKGROUND

[0002] At present, tree growth cones are widely used in forestry research, environmental monitoring and tree ring research fields. Traditional tree growth cone design relies on manual operation and is mostly fixed or single-function design, which has certain limitations. For example, during tree drilling, the operator cannot guarantee the precise control of drilling depth and angle, which may cause inaccurate sampling or even damage the tree or break the sampling tool.

[0003] Chinese utility model patent CN219104389U: the patent discloses a tree ring growth cone, which adopts the combination design of cone pipe and core puller, and drives the cone to drill into the tree through the driving mechanism. At the same time, a positioning mechanism is adopted to accurately control the drilling angle, so as to improve the drilling accuracy of the tree growth cone. The design clamps the trunk through the supporting frame and limits the angle of the cone pipe, which improves the stability and accuracy of drilling. However, this design has poor adaptability to trees, especially in the case of high tree hardness or complex environment, and may still have operation difficulties, and the structure of the driving mechanism is relatively complex, which is difficult to maintain and adjust.

[0004] Chinese utility model patent CN220872114U: the patent discloses a tree growth cone with a fastening ring and an elastic rope, which fixes the drilling position through a tightening mechanism and avoids damage caused by force deviation during operation. The design makes the operation more convenient, especially for manual operators, which can improve the operation stability. However, the fixing method of this design mainly depends on the elastic rope and the tightening mechanism, which may not be stable in long-term use or hard tree drilling, thereby affecting the drilling effect. At the same time, there is no accurate control of drilling depth and angle, which may cause inconsistency in the sampling process.

[0005] Although the existing technology provides some improvements in some aspects, there are still some deficiencies. For example, the drilling accuracy control in the existing design is insufficient, especially in different tree species and different hardness of trees, which cannot provide stable drilling effect. At the same time, the manual operation method is prone to uneven force or operation difficulty when dealing with hard trees, which affects the work efficiency and sampling accuracy of the operator. UTILITY MODEL CONTENTS

[0006] The utility model aims at overcoming the deficiencies of the prior art and providing a tree growth cone to solve the above problems.

[0007] The utility model discloses a tree growth cone, including drilling pipe, the bottom end of drilling pipe is threadedly connected with drilling head, the inner wall of drilling pipe is rotatably connected with support pipe, support pipe is slidably connected with support sliding block in, the top of support sliding block is fixedly connected with indicating rod, and the top of indicating rod penetrates drilling head and extends to the upside of drilling head, and the outer end of indicating rod is engraved with the scale for showing length, the position of drilling pipe outer end close to its top is fixedly connected with the big gear, and the outer end of big gear is connected with pinion and engages, and the same gear box is established to the outer end of big gear and pinion, the outer end of support pipe is provided with keyway along its axial direction, and gear box is slidably connected with the outer end of support pipe through keyway, and the top of the pivot of pinion penetrates gear box, and the penetrating portion is equipped with motor, and the motor casing is fixedly connected with the top of gear box, and the pivot of pinion is fixedly connected with the power shaft of motor.

[0008] The outer end of drilling head is provided with a thread for pushing the drilling head to drill, the outer diameter of the drilling head is equal to the outer diameter of the drilling pipe, and the outer end of the bottom end of the drilling head is provided with a chamfer.

[0009] The bottom end of the drilling head is fixedly connected with a plurality of cutting teeth, the bottom end of the cutting teeth is alternately fixedly connected with concave teeth and convex teeth, and the outer end of the convex teeth is matched with the concave part of the concave teeth.

[0010] The bottom end of the support pipe is provided with a boss, and the boss is located between the bottom end of the drilling pipe and the drilling head, the outer diameter of the support sliding block is greater than the outer diameter of the indicating rod, the bottom end of the support sliding block is fixedly connected with a sharp cone, and the bottom end of the sharp cone is more than the bottom end of the convex teeth by one to two millimeters.

[0011] The bottom end of the gear box is fixedly connected with an end cover, and the end cover is rotatably connected with the outer end of the drilling pipe.

[0012] The power shaft of the motor penetrates the motor upwards, and the penetrating part is fixedly connected with a hand wheel, and the top of the hand wheel is fixedly connected with a handle for better drilling of the hand wheel.

[0013] The gear box is fixedly connected with left-right symmetrical drilling handles, the motor is electrically connected with an external control system through wires, and the motor has a self-locking function.

[0014] The outer end of the drilling pipe is provided with a chip removal groove along the axial direction thereof, the chip removal groove penetrates both ends of the chip removal groove along the axial direction of the drilling pipe, the outer end of the support pipe is provided with an observation groove along the axial direction thereof, and the observation groove penetrates both ends of the observation groove along the axial direction of the support pipe.

[0015] The top of the indicating rod is threadedly connected with a limit ring for preventing the indicating rod from slipping out of the support pipe, and the pitch circle diameter of the big gear is greater than the pitch circle diameter of the pinion.

[0016] The utility model discloses the beneficial effect is:

[0017] 1. Through the cooperation of electric drive and gear system, it can efficiently complete the drilling task in electric control mode, significantly improves the operation efficiency and reduces the labor intensity of manual operation. The motor drives the pinion to rotate, and the power is transmitted through the gear box to ensure the stable rotation of the drilling head and improve the drilling efficiency and accuracy.

[0018] 2. When the power is insufficient or facing hard trees, the manual control mode provides flexible operation mode to ensure that the equipment can still complete the drilling work in the case of insufficient power. Manual operation of the handle and the drilling handle can assist the drilling work to ensure that the task can be completed smoothly under different working conditions.

[0019] 3. The cooperation of the indicating rod and the supporting slider makes the drilling depth real-time display, and the operator can accurately master the drilling progress. Through the observation groove, the user can directly observe the state of the drilling head to ensure the accuracy of the sampling process and avoid sample damage or false sampling caused by improper depth control.

[0020] 4. The design of the chip removal groove effectively removes the wood chips generated during drilling, keeps the drilling path unobstructed, avoids the operation problems caused by wood chip blockage, and improves the operation efficiency. This chip removal system ensures the continuity and stability of the cutting operation, especially in long-time drilling process, the wood chips can be cleaned in time to avoid accumulation.

[0021] 5. The threaded connection between the drilling head and the drilling pipe ensures that the drilling head can be easily replaced after wear, greatly prolonging the service life of the equipment. The self-locking function of the motor and the gear box ensures the safety of the operation and reduces the accidents caused by abnormal operation of the motor.

[0022] 6. Through the combination of electric and manual control, users can choose the most suitable operation mode according to different environments and working conditions. Whether using the electric system in an environment with sufficient power or operating through the manual mode in a difficult working environment, the equipment can provide reliable support.

[0023] 7. The design of the supporting pipe and the supporting slider ensures that the supporting pipe does not rotate during drilling, thereby avoiding damage or breakage of the growth cone caused by the rotation of the supporting pipe. The precise sliding and display of the indicating rod help the operator accurately master the drilling depth, further improving the drilling accuracy.

[0024] 8. The utility model can be effectively applied in field operation, especially suitable for scenes that need to be frequently moved and deal with complex environments. The combination of electric and manual control makes the equipment have high adaptability and operation flexibility, ensuring that the equipment can work normally under different natural conditions. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The overall structure of the utility model Figure 1 ;

[0026] Figure 2 The overall structure of the utility model

[0027] Figure 3 The overall structure of the utility model

[0028] Figure 4 The overall structure of the utility model Figure 2 ;

[0029] Figure 5 The overall structure of the utility model

[0030] Figure 6 The overall structure of the utility model Figure 5 The overall structure of the utility model

[0031] Figure 7 The overall structure of the utility model Figure 6 The overall structure of the utility model

[0032] Figure 8 The overall structure of the utility model Figure 7 The overall structure of the utility model

[0033] Figure 9 The overall structure of the utility model

[0034] Figure 10 The overall structure of the utility model

[0035] Explanation of reference numerals in the drawings

[0036] 1, drilling pipe; 2, drilling head; 3, support pipe; 4, support sliding block; 5, indicating rod; 6, large gear; 7, small gear; 8, gear box; 9, motor; 10, cutting tooth; 11, concave tooth; 12, convex tooth; 13, sharp cone; 14, hand wheel; 15, drilling handle; 16, chip removal groove; 17, observation groove. DETAILED DESCRIPTION

[0037] The technical solutions of the utility model will be described clearly and completely below in conjunction with embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0038] It is explained that the orientation concepts of "left", "right", "up", "down", "front", "back", "inner" and "outer" in the following solutions are all relative directions, which will not be listed one by one.

[0039] Example 1

[0040] like Figures 1 to 10 As shown, the tree growth cone of Example 1 includes the following core components:

[0041] The drill pipe 1 is used to connect other components and provides support and guidance.

[0042] Drill bit 2 is fixed to the bottom end of drill pipe 1 and is responsible for the actual drilling of trees. Drill bit 2 is connected to drill pipe 1 by threads and can be replaced as needed.

[0043] The inner wall of the support tube 3 is rotatably connected to the drilling tube 1 to support and guide the sliding of the support slider 4, thus maintaining the stability of the entire device.

[0044] The support slider 4 is slidably connected inside the support tube 3, and an indicator rod 5 is fixedly connected to its top end to show the drilling length of the tree growth cone.

[0045] The indicator rod 5 passes through the drill bit 2 and extends to the upper side of the drill bit 2 to accurately display the drilling depth. Its outer end is engraved with length graduations. The top of the indicator rod 5 is threaded with a limit ring to prevent the indicator rod 5 from slipping out of the support tube 3.

[0046] The large gear 6 and the small gear 7 are installed at the outer end of the drill pipe 1, driving the entire drill head 2 to rotate. The large gear 6 and the small gear 7 mesh with each other and cooperate through the gearbox 8 to transmit rotational power.

[0047] A drilling handle 15 is fixed to the outer end of the gearbox 8 and is slidably connected to the support tube 3 via a keyway. The gearbox 8 contains a small gear 7 and a large gear 6, which transmit the power of the motor 9 to the drill pipe 1.

[0048] The motor 9 is located inside the gearbox 8 and drives the pinion 7 to rotate via the power shaft, thereby driving the drill pipe 1 to rotate. The motor 9 is electrically connected to the external control system and has a self-locking function to ensure operational stability.

[0049] Working principle

[0050] In practical use, the user first places the bottom end of the cone 13 against the surface of the tree, ensuring that the drill pipe 1 is aligned with the target position. Then, the user adjusts the direction using the drill handle 15, ensuring that the axis of the drill pipe 1 is aligned with the tree. At this time, the motor 9 is started through the external control system. The power shaft of the motor 9 drives the pinion 7 to rotate, which in turn drives the large gear 6 to rotate. The large gear 6 transmits power to the drill pipe 1 through gear transmission, thereby causing the drill head 2 and the cutting teeth 10 to start rotating and performing the cutting operation.

[0051] During the drilling process, the concave teeth 11 and convex teeth 12 alternately cut the tree, and the wood chips are discharged through the chip removal groove 16. During the entire drilling process, the support tube 3 remains stationary, avoiding the influence of the rotation of the support tube 3 on the stability of the drilling process, thereby preventing the growth cone from breaking.

[0052] At the same time, the indicating rod 5 is driven by the support slider 4 to slide along the support tube 3, displaying the drilling depth in real time, ensuring that the operator can accurately control the drilling progress. The design of the observation groove 17 also allows the user to directly observe the working state of the drilling head 2, further improving the accuracy and reliability of the operation.

[0053] The efficient rotation of the drilling head 2 is achieved by driving the pinion gear 7 and the large gear 6 by the motor 9. Compared with traditional manual operation, the electric control mode significantly improves the drilling efficiency and reduces the labor intensity of the operator.

[0054] The cooperative design of the indicating rod 5 and the support slider 4 can display the drilling depth in real time, making the entire drilling process more accurate and avoiding sample damage or data errors caused by improper depth control.

[0055] The threaded connection design between the drilling head 2 and the drilling tube 1 allows the drilling head 2 to be easily replaced after wear, thereby extending the service life of the equipment and reducing maintenance and replacement costs.

[0056] When the power is insufficient or when encountering hard trees, the user can complete the drilling task by manually operating the hand wheel 14, ensuring that the equipment can operate stably in various environments and providing higher adaptability and reliability.

[0057] The alternating design of the concave teeth 11 and convex teeth 12 effectively avoids uneven cutting, the wood chips are smoothly discharged through the chip removal groove 16, maintaining the cutting efficiency and stability of the drilling head 2, and the tree around the growth cone is directly cut into wood chips, which has less impact on the growth cone compared to traditional direct drilling.

[0058] In summary, Example 1 improves the efficiency, accuracy, and adaptability of the tree growth cone through electric drive and precise mechanical design, and provides greater convenience in maintenance and operation, making it suitable for various field drilling operations.

[0059] Example 2:

[0060] As shown in Figures 1 to 10 Example 2 is based on Example 1, and the design of the tree growth cone still includes core components, but adds a manual control function to ensure effective operation when the power is insufficient or when encountering high hardness trees. The main components are as follows:

[0061] The drilling tube 1 provides support and guidance for drilling. The outer end is provided with a chip removal groove 16 for removing wood chips generated during drilling to ensure smooth drilling.

[0062] The drilling head 2 is connected to the bottom end of the drilling tube 1 by threads, responsible for cutting trees. The threads on the outer end of the drilling head 2 cooperate with the organization of the tree to push the drilling process.

[0063] The support tube 3 is fixedly connected inside the drilling tube 1, used to support the sliding block 4 and the indicator rod 5, keeping the drilling head 2 stable during operation.

[0064] The support sliding block 4 is slidingly connected inside the support tube 3, moving with the indicator rod 5, showing the depth of drilling.

[0065] The indicator rod 5 is connected to the limit ring at the top end to prevent it from slipping out of the support tube 3, used to display the drilling depth. The indicator rod 5 penetrates the drilling head 2 and extends upward to display the length.

[0066] The large gear 6 is fixed to the outer end of the drilling tube 1 and meshes with the small gear 7, achieving power transmission through gear transmission.

[0067] The gear box 8 achieves power transmission through the large gear 6 and the small gear 7, and the outer end is fixed with a drilling handle 15, which can be manually operated by the user to adjust the drilling direction.

[0068] The motor 9 drives the small gear 7 to rotate to drive the drilling tube 1 to rotate. When the motor 9 cannot provide enough power, the motor 9 is connected to the external control system through wires, which can be self-locked.

[0069] The hand wheel 14 is fixed to the through part of the power shaft of the motor 9, providing the ability of manual operation. The hand wheel 14 is connected to the handle at the top end, and the user can assist the drilling process by manual operation.

[0070] Working principle

[0071] In manual control mode, the user places the bottom end of the pointed cone 13 against the surface of the tree, then pushes the drilling handle 15, so that the concave teeth 11 and convex teeth 12 come into contact with the tree. Next, adjust the axis of the drilling tube 1 to align it with the target position. At this time, the user can start drilling by manually operating the drilling handle 15 and the hand wheel 14.

[0072] During drilling, the motor 9 can be started by the external control system to drive the small gear 7 to rotate, which drives the large gear 6 and the drilling tube 1 to rotate through the gear box 8, further driving the drilling head 2, cutting teeth 10, concave teeth 11 and convex teeth 12 to rotate, thereby cutting the tree. The wood chips generated by cutting are removed through the chip removal groove 16.

[0073] The support tube 3 remains non-rotating, ensuring that during drilling, the support slider 4 and the indicator rod 5 slide away from the drilling head 2, and the drilling depth is displayed in real time. After drilling is complete, the user can directly observe the drilling state of the growth cone by observing the slot 17, and push the growth cone out by pushing the support slider 4 with the indicator rod 5.

[0074] If the power is insufficient during field sampling or hard trees are encountered, the user can assist in drilling by using the hand wheel 14 to rotate the pinion gear 7, thereby completing the drilling operation. If effective drilling still cannot be achieved, the user can manually rotate the drilling handle 15 after locking the motor 9, and the drilling tube 1, the drilling head 2, and the support tube 3 are driven to rotate together through the gear transmission, thereby completing the drilling.

[0075] When external power is insufficient or the hardness of the tree to be drilled is high, manual operation through the hand wheel 14 and the drilling handle 15 can ensure that the drilling operation continues. This combination of manual and electric operation provides high adaptability and meets the needs of various field operations.

[0076] Through the gear transmission system of the large gear 6 and the pinion gear 7, stable power transmission can be achieved, ensuring the stability of cutting and the effective removal of wood chips during drilling, thereby improving drilling efficiency and accuracy.

[0077] The cooperative design of the indicator rod 5 and the support slider 4 ensures accurate display of the drilling depth, allowing the operator to accurately monitor the drilling progress and avoid inaccurate sampling or sample damage due to improper depth.

[0078] The design of the chip removal groove 16 and the observation slot 17 effectively removes wood chips generated during drilling, and the observation slot 17 also allows the user to monitor the drilling in real time, ensuring efficient and stable operation.

[0079] Through the combination of manual and electric systems, the device can be flexibly used under different working conditions. The motor provides efficient power, while the manual system provides additional power in the event of insufficient power or in special scenarios, ensuring that the drilling task can be completed smoothly in various situations.

[0080] An intelligent control system can be introduced to monitor the drilling state through sensors and automatically adjust the motor output power, thereby improving drilling efficiency and safety. For example, in the case of a tree with high hardness, the system automatically switches to manual mode to ensure that the operation is not interrupted.

[0081] The chip removal groove 16 can be further optimized to add an automatic wood chip removal function, ensuring that wood chips do not accumulate and affect drilling efficiency during long-term use.

[0082] In order to improve the convenience of field use, a wireless control system can be added, allowing users to remotely control the motor start and stop, without frequent operation of manual components, thereby further improving work efficiency.

[0083] In the design of the drilling head 2, adjustable functions can be further added to adapt to the hardness and material of different trees, improving the adaptability and durability of the drilling head 2 in various environments.

[0084] Working principle

[0085] When in use, manually press the sharp cone 13 against the tree surface, then push the drilling handle 15 to make the concave teeth 11 and convex teeth 12 abut against the outer end of the tree, then adjust the direction to make the axis direction of the drilling pipe 1 coincide with the desired direction, then the user holds the drilling handle 15 with his hand, and fixes the drilling handle 15 and the gear box 8;

[0086] Then start the motor 9 through the external control system, the motor 9 drives the pinion 7 to rotate, the pinion 7 in turn drives the gear wheel 6 and the drilling pipe 1 to rotate, the drilling pipe 1 drives the drilling head 2, the cutting teeth 10, the concave teeth 11 and the convex teeth 12 to rotate when rotating, the concave teeth 11 and the convex teeth 12 cut the tree during the rotation process, the cut wood chips are discharged through the chip removal groove 16, the concave teeth 11 and the convex teeth 12 cut the tree respectively, so that the wood chips can be cut into small pieces, and in this process, the support pipe 3 remains stationary, thereby preventing the growth cone from being affected by rotation and causing breakage.

[0087] During the drilling process, the threads at the outer end of the drilling head 2 cooperate with the tree to push the drilling head 2 to drill, and after the drilling is completed, the drilling pipe 1 is reversed to remove the drilling head 2.

[0088] During the drilling process, the support slider 4 and the indicator rod 5 continuously move away from the drilling head 2 under the action of the growth cone, displaying the length of the growth cone;

[0089] After the drilling is completed, the growth cone can be directly observed through the observation slot 17 on the support pipe 3, then the indicator rod 5 is pushed, the indicator rod 5 pushes the support slider 4 to push out the growth cone, and the sampling is completed.

[0090] If the external control system is insufficient in power during the field sampling process, manual rotation of the hand wheel 14 can be used for sampling, the hand wheel 14 drives the pinion 7 to rotate;

[0091] If a tree with high hardness is encountered, manual rotation of the hand wheel 14 cannot be used for sampling, the control system locks the motor 9, then the drilling handle 15 is manually rotated, the drilling handle 15 drives the drilling pipe 1, the drilling head 2 and the support pipe 3 to rotate together, and the sampling is realized.

[0092] The drilling head 2 is threadedly connected with the drilling pipe 1, so that the drilling head 2 can be replaced conveniently after the drilling head 2 is worn out;

[0093] The preferred embodiments of the present application are described above, it should be understood that the present application is not limited to the forms disclosed herein, should not be considered as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein, by the above teachings or related art or knowledge. The modifications and changes made by the person skilled in the art do not deviate from the spirit and scope of the present application, and should be within the protection scope of the claims of the present application.

Claims

1. A tree growth cone, characterized in that, The utility model provides a kind of drilling head, including drilling pipe (1), the bottom end threaded connection of drilling pipe (1) is connected with drilling head (2), the inner wall rotationally connected with support tube (3) of drilling pipe (1), the support slider (4) of sliding connection is located in support tube (3), the top end fixed connection of support slider (4) is connected with indicating rod (5), indicating rod (5) top end penetrates drilling head (2) and extends to the upside of drilling head (2), scale for showing length is engraved on the outer end of indicating rod (5), the outer end of drilling pipe (1) is fixedly connected with large gear (6) near its top end, the outer end of large gear (6) is engaged with pinion (7), the same gear box (8) is equipped with the outer end of large gear (6) and pinion (7), the outer end of support tube (3) is provided with keyway along its axial direction, gear box (8) is slidably connected with the outer end of support tube (3) by keyway, the rotation axis top end of pinion (7) penetrates gear box (8), and the penetrating portion is equipped with motor (9), the shell of motor (9) is fixedly connected with the top end of gear box (8), the power shaft of motor (9) is fixedly connected with the rotation axis of pinion (7).

2. A tree growth cone according to claim 1, characterised in that: The outer end of drilling head (2) is provided with thread for pushing drilling head (2) to drill, the outer diameter of drilling head (2) is equal to the outer diameter of drilling pipe (1), and the outer end of the bottom end of drilling head (2) is provided with chamfer.

3. A tree growth cone according to claim 2, wherein: The bottom end of drilling head (2) is fixedly connected with a plurality of cutting teeth (10), the bottom end of cutting tooth (10) is alternately fixedly connected with concave tooth (11) and convex tooth (12), and the outer end of convex tooth (12) is matched with the concave part of concave tooth (11).

4. A tree growth cone according to claim 3, wherein: The bottom end of support tube (3) is provided with a boss, and the boss is located between the bottom end of drilling pipe (1) and drilling head (2), the outer diameter of support slider (4) is greater than the outer diameter of indicating rod (5), the bottom end of support slider (4) is fixedly connected with sharp cone (13), and the bottom end of sharp cone (13) exceeds the bottom end of convex tooth (12) by one to two millimeters.

5. A tree growth cone according to claim 4, wherein: The bottom end of gear box (8) is fixedly connected with end cover, and the end cover is rotatably connected with the outer end of drilling pipe (1).

6. A tree growth cone according to claim 1, wherein: The power shaft of motor (9) penetrates motor (9) upward, and the penetrating portion is fixedly connected with hand wheel (14), and the top end of hand wheel (14) is fixedly connected with handle for better drilling hand wheel (14).

7. A tree growth cone according to claim 6, wherein: The outer end of gear box (8) is fixedly connected with left-right symmetrical drilling handle (15), the motor (9) is electrically connected with external control system through wire, and the motor (9) has self-locking function.

8. A tree growth cone according to claim 1, wherein: The outer end of drilling pipe (1) is provided with chip removal groove (16) along its axial direction, the chip removal groove (16) penetrates both ends of chip removal groove (16) along the axial direction of drilling pipe (1), the outer end of support tube (3) is provided with observation groove (17) along its axial direction, and the observation groove (17) penetrates both ends of observation groove (17) along the axial direction of support tube (3).

9. A tree growth cone according to claim 1, wherein: The top end of indicating rod (5) is threadedly connected with limit ring, to prevent indicating rod (5) from slipping out of support tube (3), and the diameter of the division circle of large gear (6) is greater than the diameter of the division circle of pinion (7).

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