Portable forest cultivation sample collector

Abstract

The portable forest cultivation sample collector comprises a main loading plate with an arc-shaped groove in the front face, a positioning assembly used for clamping trees is installed on the back face of the main loading plate, and a sampling assembly used for sampling inner cores of the trees is installed in the center of the back face of the upper end of the main loading plate. Firstly, a stepping motor is controlled to rotate reversely to drive a drill bit to rotate forwards, then a position adjusting air cylinder is controlled to be started to drive the drill bit to enter an inner core of a tree, a stripping thread can rotate synchronously with the drill bit and generate backward thrust on the tree core, and at the moment, the drill bit and a middle cavity in the sampling pipe can collect inner core samples of the tree along the road; the drill bit can be driven to move backwards by controlling the position adjusting air cylinder to start again, the drill bit moves backwards to promote the stripping thread to cut off the terminal of the collected tree core, when the drill bit fully moves to the outside of the tree, sampling of the tree inner core is rapidly completed, and the sampling mode is time-saving, labor-saving and high in working efficiency.

Description

Technical Field

[0001] This invention relates to the field of sample collection technology, and more particularly to a portable forest cultivation sample collector. Background Technology

[0002] In forest cultivation and resource surveys, it is usually necessary to sample and analyze the tree core to understand information such as tree growth status, age structure, and internal defects. Tree core sampling generally involves drilling into the xylem core material inside the tree using a sampler, followed by measurement and testing of the core material. Therefore, the positioning accuracy of the sampler, its operational efficiency, and the sampling method directly affect the sampling quality and work efficiency.

[0003] Existing tree core sampling devices typically have simple positioning structures, relying heavily on operators holding the sampler and placing it directly against the tree trunk surface for positioning. They lack dedicated automatic or auxiliary positioning structures. This simple manual positioning method easily leads to deviations between the sampler's drilling direction and the preset direction, affecting not only the accuracy of the sampling location but also reducing stability during the sampling process. Furthermore, most existing samplers operate on a single-sampling, manual rotation method. This means that after each tree core sampling, the sampler's handle or drill rod needs to be manually rotated multiple times to remove the sampler from the trunk. This process is time-consuming, labor-intensive, and inefficient, especially when continuous sampling of a large number of trees is required, resulting in significant workload for operators. Therefore, providing a portable forest cultivation sample collector is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] One object of the present invention is to provide a portable forest cultivation sample collector to solve the aforementioned technical problems.

[0005] A portable forest cultivation sample collector according to an embodiment of the present invention includes: The main mounting plate has an arc-shaped groove on the front. A positioning component for clamping trees is installed on the back of the main mounting plate. A sampling component for sampling the inner core of the tree is installed at the center of the back of the upper part of the main mounting plate. A collection component for collecting samples is provided on the upper surface of the rear end of the positioning component. A control box for electrically connecting various electrical components is installed at the center of the back of the positioning component. A multi-button for controlling the drive of various electrical components is installed on the upper surface of the left rear end of the positioning component. The positioning component includes a clamping unit, an automatic positioning unit, and a maintenance unit. The clamping unit is installed on the back of the main assembly plate, and the clamping end is located at the front of the main assembly plate. The automatic positioning unit is installed at the front end of the clamping unit, and the maintenance unit is installed at the rear end of the clamping unit.

[0006] As a preferred embodiment of the present invention, the clamping unit includes a frame, the front end of which is fixedly connected to the back of both ends of the main mounting plate. A main adjusting screw with reverse threads on its surface is rotatably connected to the center of both sides of the frame via bearings. A servo motor is fixedly mounted on the right side of the frame via a base, and the output end of the servo motor on the left side is fixedly connected to the right end of the main adjusting screw via a coupling. Two limiting sliding holes are provided on the front of both ends of the main mounting plate. Two driven brackets with threads connected to the surface of the main adjusting screw are provided in the inner cavity of the two limiting sliding holes. Two positioning clamps with opposing clamping surfaces are rotatably connected to the front of the two driven brackets via bearings. Handles are fixedly connected to the back of both ends of the frame.

[0007] As a preferred embodiment of the present invention, anti-slip grooves are provided in the middle area of ​​the two positioning clamps on the side that is close to each other.

[0008] As a preferred embodiment of the present invention, the automatic positioning unit includes two sets of pressure sensors. The two sets of pressure sensors are respectively embedded in the four corners of the opposite side of the two positioning clamps. A detection cone is connected to the end of the two sets of pressure sensors that are close to each other. A front grinding plate is fixedly connected to the rear end of each positioning clamp. Two positioning cylinders are fixedly installed at the front end of the opposite side of the two driven brackets. A rear grinding plate is fixedly connected to the front end of each positioning cylinder.

[0009] As a preferred embodiment of the present invention, the maintenance unit includes a U-shaped socket, which is located on the left side of the frame. A U-shaped slot of the same size as the U-shaped socket is provided on the inner wall of the right side of the frame. Track grooves of the same width as the U-shaped socket and the U-shaped slot are provided on the upper and lower sides of the back of the main mounting plate.

[0010] As a preferred embodiment of the present invention, a cover that slides against the inner wall of the rail groove is inserted into the U-shaped insertion hole and the U-shaped slot. A lock hole is provided on the upper surface of the right end of the cover. A lock block is fixedly connected to the top of the inner wall of the right side of the frame. A lock rod is threadedly connected to both the lock block and the inner wall of the lock hole.

[0011] As a preferred embodiment of the present invention, the sampling assembly includes an auxiliary mounting plate. The lower end of the auxiliary mounting plate is fixedly connected to the back of the upper end of the main mounting plate by bolts. An adjustment cylinder is fixedly installed on the back of the upper end of the auxiliary mounting plate. A rear mounting plate is fixedly connected to the piston rod end of the rear side of the adjustment cylinder. A sampling tube is rotatably connected to the front of the lower end of the rear mounting plate through a bearing. A drill bit communicating with the inner cavity of the sampling tube is fixedly connected to the front end of the sampling tube. A lower driven gear is fixedly connected to the outer surface of the rear end of the sampling tube. A stepper motor is fixedly installed on the back of the rear mounting plate. An upper drive gear meshing with the lower driven gear is fixedly sleeved on the output shaft surface of the rear end of the stepper motor.

[0012] As a preferred embodiment of the present invention, a magnetic ring is fixedly sleeved on the outer surface of the rear end of the sampling tube, and an iron sampling rod is movably inserted into the inner cavity of the sampling tube.

[0013] As a preferred embodiment of the present invention, the inner wall of the drill bit front end is provided with a stripping thread.

[0014] As a preferred embodiment of the present invention, the collecting component includes a plurality of positioning screw grooves, which are respectively opened on the upper surface of the rear end of the stand. Each positioning screw groove is threadedly connected to a collecting sample dish in its inner cavity, and a dish cap is threadedly connected to the upper surface of each collecting sample dish.

[0015] The beneficial effects of this invention are: This invention, through its clamping unit and automatic positioning unit, first controls the servo motor to rotate forward, which in turn drives the main adjusting screw to rotate forward. The main adjusting screw's rotation moves two driven brackets in opposite directions, which in turn moves two positioning clamps in opposite directions. When the opposing sides of the two positioning clamps are in full contact with the tree surface, the initial positioning of the sampler is completed. Then, pressure sensors at the four corners enable the detection cones to automatically measure force. When all four corner detection cones are under force, it indicates that the positioning clamps are stably clamped onto the tree surface. Simultaneously, the electrical signals from the pressure sensors are transmitted to the positioning cylinder... By controlling its start, the positioning cylinder can drive the rear grinding plate forward. When the rear grinding plate is in full contact with the surface of the front grinding plate, the positioning clamp can be repositioned, thereby greatly improving the stability of the entire sampler and effectively reducing the deviation between the sampler's drilling direction and the preset direction, thus improving the accuracy of the sampling position. Finally, controlling the servo motor to reverse can drive the two positioning clamps to move in opposite directions. When the two positioning clamps are fully detached from the surface of the tree, the sampler can be quickly disassembled. At the same time, controlling the distance between the two positioning clamps can enable the positioning component to clamp trees of different diameters, greatly improving the practicality of the sampler.

[0016] This invention utilizes a maintenance unit. First, by controlling the locking rod to reverse, it moves upward. When the lower end of the locking rod is fully disengaged from the inner cavity of the lock hole, pulling the cover to the left disengages it from the U-shaped insertion hole. This allows maintenance personnel to easily lubricate the transmission components, completing the maintenance of the internal structure of the positioning assembly and effectively improving its service life. Then, pushing the cover to the right allows it to enter the U-shaped slot. At this point, controlling the locking rod to rotate clockwise causes its lower end to re-enter the lock hole, quickly locking the cover. This effectively protects the transmission components in the positioning assembly from external environmental contamination, improving the user experience of the sampler.

[0017] This invention utilizes a sampling assembly. First, controlling the stepper motor to reverse reverse drives the upper drive gear to reverse as well. The reverse rotation of the upper drive gear drives the lower driven gear and sampling tube to rotate forward simultaneously. The forward rotation of the sampling tube drives the drill bit to rotate forward. Then, controlling the adjustment cylinder to start moves the rear loading plate forward. The forward movement of the rear loading plate drives the sampling tube and drill bit to move forward simultaneously. The forward movement of the drill bit causes it to spiral into the core of the tree. The ejector thread rotates synchronously with the drill bit, generating a backward thrust on the tree core. At this point, the drill bit and... The central chamber inside the sampling tube collects core samples from the tree along the path. Activating the adjusting cylinder again moves the rear loading plate backward, which in turn moves the sampling tube and drill bit backward simultaneously. The drill bit's backward movement causes the stripping thread to cut off the collected core. When the drill bit has fully moved to the outside of the tree, the core sampling is completed quickly. This sampling method is time-saving, labor-saving, and highly efficient. Furthermore, continuous sampling of the tree core greatly reduces the user's workload.

[0018] This invention utilizes a specially designed collection component. First, it controls the sample collection dish to rotate so that its lower end disengages from the inner cavity of the positioning screw groove. Then, it controls the dish cap to rotate and disengage from the surface of the sample collection dish. At this point, the sampling rod is removed, and the inlet end of the sample collection dish is inserted into the outer surface of the rear end of the sampling tube. Next, the sampling rod is inserted into the inner cavity of the drill bit's front end, and then the sampling rod is pushed backward. Pushing the sampling rod backward moves the sample backward. When the sample has fully entered the interior of the sample collection dish, the sample collection is quickly completed. Then, the dish cap is rotated to the top of the sample collection dish, and finally, the sample collection dish is rotated into the corresponding positioning screw groove. Multiple positioning screw grooves sequentially label the sample collection dishes, thus enabling automatic numbering of the collected samples and significantly improving the practicality of the entire sampler. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the structure of a portable forest cultivation sample collector proposed in this invention; Figure 2 This is a schematic diagram of the structure of a portable forest cultivation sample collector proposed in this invention, viewed from below.

[0021] Figure 3 This is a side cross-sectional view of a portable forest cultivation sample collector proposed in this invention.

[0022] Figure 4 This invention proposes a portable forest cultivation sample collector. Figure 3 A three-dimensional image.

[0023] Figure 5 This invention proposes a portable forest cultivation sample collector. Figure 4 A structural diagram from a rear view.

[0024] Figure 6 This is a cross-sectional view of a positioning component for a portable forest cultivation sample collector proposed in this invention.

[0025] Figure 7 This invention proposes a portable forest cultivation sample collector. Figure 6 A three-dimensional image.

[0026] Figure 8 This is an exploded view of the positioning component and collection component of a portable forest cultivation sample collector proposed in this invention.

[0027] Figure 9 This invention proposes a portable forest cultivation sample collector. Figure 8 A structural diagram from the left side.

[0028] Figure 10 This invention proposes a portable forest cultivation sample collector. Figure 9 A structural diagram from a rear view.

[0029] Figure 11 This is a partial structural diagram of the sampling component of a portable forest cultivation sample collector proposed in this invention.

[0030] Figure 12 This invention proposes a portable forest cultivation sample collector. Figure 11 A structural diagram from a rear view.

[0031] Figure 13 This invention proposes a portable forest cultivation sample collector. Figure 4 Enlarged view of point A in the middle.

[0032] Figure 14 This invention proposes a portable forest cultivation sample collector. Figure 5 Enlarged view of point B in the middle.

[0033] Figure 15 This invention proposes a portable forest cultivation sample collector. Figure 7 Enlarged view of point C in the middle.

[0034] Figure 16 This invention proposes a portable forest cultivation sample collector. Figure 8 Enlarged view of point D in the middle.

[0035] Figure 17 This invention proposes a portable forest cultivation sample collector. Figure 9 Enlarged view of point E in the middle.

[0036] Figure 18 This invention proposes a portable forest cultivation sample collector. Figure 10 Enlarged view of point F in the middle.

[0037] In the diagram: 1. Main mounting plate; 2. Positioning assembly; 201. Stand; 202. Main adjusting screw; 203. Servo motor; 204. Limiting sliding hole; 205. Driven mounting bracket; 206. Positioning clamp; 207. Handle; 208. Pressure sensor; 209. Detection cone; 210. Front grinding plate; 211. Positioning cylinder; 212. Rear grinding plate; 213. U-shaped insertion hole; 214. U-shaped slot; 215. Rail groove; 216. Cover; 217. Locking hole; 218. Locking block; 219. Locking rod; 3. Sampling assembly; 301. Auxiliary loading plate; 302. Adjusting cylinder; 303. Rear loading plate; 304. Sampling tube; 305. Drill bit; 306. Lower driven gear; 307. Stepper motor; 308. Upper drive gear; 309. Magnetic ring; 310. Sampling rod; 311. Unloading thread; 4. Collection component; 401. Positioning screw groove; 402. Collection sample dish; 403. Dish cover; 5. Control box; 6. Multi-button. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0039] refer to Figures 1-18 A portable forest cultivation sample collector.

[0040] This implementation plan includes: The main mounting plate 1 has an arc-shaped groove on the front. A positioning component 2 for clamping trees is installed on the back of the main mounting plate 1. A sampling component 3 for sampling the inner core of the tree is installed at the center of the upper back of the main mounting plate 1. A collection component 4 for collecting samples is provided on the upper surface of the rear end of the positioning component 2. A control box 5 for electrically connecting various electrical components is installed at the center of the back of the positioning component 2. A multi-button 6 for controlling the drive of various electrical components is installed on the upper surface of the left rear end of the positioning component 2. The positioning component 2 includes a clamping unit, an automatic positioning unit, and a maintenance unit. The clamping unit is installed on the back of the main mounting plate 1, and the clamping end is located at the front of the main mounting plate 1. The automatic positioning unit is installed at the front end of the clamping unit, and the maintenance unit is installed at the rear end of the clamping unit.

[0041] The clamping unit includes a frame 201. The front end of the frame 201 is fixedly connected to the back of both ends of the main mounting plate 1. The center of both sides of the frame 201 is rotatably connected to a main adjusting screw 202 with reverse threads on its surface via bearings. A servo motor 203 is fixedly mounted on the right side of the frame 201 via a base. The output end of the servo motor 203 on the left side is fixedly connected to the right end of the main adjusting screw 202 via a coupling. Two limiting sliding holes 204 are opened on the front of both ends of the main mounting plate 1. The inner cavity of the two limiting sliding holes 204 is provided with two driven brackets 205 that are threaded to the surface of the main adjusting screw 202. The front of the two driven brackets 205 is rotatably connected to two positioning clamping plates 206 with opposite clamping surfaces via bearings. Handles 207 are fixedly connected to the back of both ends of the frame 201.

[0042] Anti-slip grooves are provided in the middle area of ​​the two positioning clamps 206 on the side that are close to each other.

[0043] The automatic positioning unit includes two sets of pressure sensors 208, which are embedded in the four corners of the opposite side of the two positioning clamps 206. The ends of the two pressure sensors 208 that are close to each other are connected to a detection cone 209. A front grinding plate 210 is fixedly connected to the rear end of each positioning clamp 206. Two positioning cylinders 211 are fixedly installed at the front ends of the two driven brackets 205 that are far apart from each other. A rear grinding plate 212 is fixedly connected to the front end of each positioning cylinder 211.

[0044] The sampling device utilizes a clamping unit and an automatic positioning unit. First, pressing the multi-button 6 controls the servo motor 203 to rotate forward. This rotation drives the main adjusting screw 202, which in turn moves the two driven brackets 205 in opposite directions. This movement of the two driven brackets 205 then moves the two positioning clamps 206 in opposite directions. When the opposing sides of the two positioning clamps 206 are in full contact with the tree surface, the initial positioning of the sampler is completed. Then, the pressure sensors 208 at the four corners enable the detection cones 209 to automatically measure force. When all four detection cones 209 are under force, it indicates that the positioning clamps 206 are stably clamped onto the tree surface. Simultaneously, the pressure sensors 208... An electrical signal is transmitted to the positioning cylinder 211 and controls its activation. The activation of the positioning cylinder 211 drives the rear grinding plate 212 to move forward. When the rear grinding plate 212 is in full contact with the surface of the front grinding plate 210, the positioning clamp 206 is repositioned, thereby significantly improving the stability of the entire sampler and effectively reducing the deviation between the drilling direction and the preset direction, thus improving the accuracy of the sampling position. Finally, controlling the servo motor 203 to reverse will drive the two positioning clamps 206 to move in opposite directions. When the two positioning clamps 206 are fully detached from the surface of the tree, the sampler can be quickly disassembled. At the same time, controlling the distance between the two positioning clamps 206 allows the positioning component 2 to easily clamp trees of different diameters, significantly improving the practicality of the sampler.

[0045] The maintenance unit includes a U-shaped socket 213, which is located on the left side of the frame 201. A U-shaped slot 214 of the same size as the U-shaped socket 213 is provided on the inner wall of the right side of the frame 201. Track grooves 215 of the same width as the U-shaped socket 213 and the U-shaped slot 214 are provided on the upper and lower sides of the back of the main mounting plate 1. A cover 216 that slides against the inner wall of the track groove 215 is inserted into the U-shaped socket 213 and the U-shaped slot 214. A lock hole 217 is provided on the upper surface of the right end of the cover 216. A lock block 218 is fixedly connected to the top of the inner wall of the right side of the frame 201. Locking rods 219 are threadedly connected to the inner wall of the lock block 218 and the lock hole 217.

[0046] Sampling assembly 3 includes an auxiliary mounting plate 301. The lower end of the auxiliary mounting plate 301 is fixedly connected to the back of the upper end of the main mounting plate 1 by bolts. An adjusting cylinder 302 is fixedly installed on the back of the upper end of the auxiliary mounting plate 301. A rear mounting plate 303 is fixedly connected to the end of the piston rod on the rear side of the adjusting cylinder 302. A sampling tube 304 is rotatably connected to the front of the lower end of the rear mounting plate 303 via a bearing. A drill bit 305 communicating with the inner cavity of the sampling tube 304 is fixedly connected to the front end of the sampling tube 304. A lower driven gear 306 is fixedly connected to the outer surface of the rear end of the sample tube 304. A stepper motor 307 is fixedly installed on the back of the rear mounting plate 303. An upper drive gear 308 that meshes with the lower driven gear 306 is fixedly sleeved on the output shaft surface of the rear end of the stepper motor 307. A magnetic ring 309 is fixedly sleeved on the outer surface of the rear end of the sampling tube 304. An iron sampling rod 310 is movably inserted into the inner cavity of the sampling tube 304. A stripping thread 311 is opened on the inner wall of the front end of the drill bit 305.

[0047] The stripping thread 311 is designed so that it is aligned with the thread direction on the outer surface of the drill bit 305. This allows the drill bit 305, when rotating to the tree core, to transport the tree core into the sampling tube 304. The stripping thread 311 is then threadedly connected to the tree core. Pulling the sampling tube 304 causes the stripping thread 311 to break off the end of the tree core. This ensures that all collected tree cores are preserved within the hollow cavity of the sampling tube 304 and the drill bit 305, thereby improving the practicality of the drill bit 305.

[0048] The collecting component 4 includes multiple positioning screw grooves 401, which are respectively opened on the upper surface of the rear end of the frame 201. Each positioning screw groove 401 has a sample collection dish 402 threadedly connected to its inner cavity, and a dish cover 403 is threadedly connected to the upper surface of each sample collection dish 402.

[0049] The positioning screw groove 401 allows multiple collection dishes 402 to be placed sequentially, facilitating the sequential numbering of multiple collected samples.

[0050] Working principle: First, pressing the multi-button 6 controls the servo motor 203 to rotate forward. The forward rotation of the servo motor 203 drives the main adjusting screw 202 to rotate forward, which in turn moves the two driven brackets 205 in opposite directions. This movement of the two driven brackets 205 in opposite directions then moves the two positioning clamps 206 in opposite directions. When the opposing sides of the two positioning clamps 206 are in full contact with the tree surface, the initial positioning of the sampler is completed. Then, the pressure sensors 208 distributed at the four corners enable the detection cones 209 to automatically measure force. When all four detection cones 209 are under force, it indicates that the positioning clamps 206 are stably clamped onto the tree surface. Simultaneously... The electrical signal from pressure sensor 208 is transmitted to positioning cylinder 211, controlling its activation. Activation of positioning cylinder 211 moves the rear grinding plate 212 forward. When the rear grinding plate 212 is in full contact with the surface of the front grinding plate 210, secondary positioning of positioning clamp 206 is achieved. Then, controlling stepper motor 307 to reverse reverse drives upper drive gear 308 to reverse, which in turn drives lower driven gear 306 and sampling tube 304 to rotate forward simultaneously. The forward rotation of sampling tube 304 drives drill bit 305 to rotate forward. Finally, activation of adjustment cylinder 302 moves rear mounting plate 303 forward, which in turn moves sampling tube 304 and drill bit 305 forward simultaneously. Moving forward allows the spiral to enter the tree core, and the ejector thread 311 rotates synchronously with the drill bit 305, generating a backward thrust on the tree core. At this time, the drill bit 305 and the central chamber inside the sampling tube 304 collect the tree core sample along the way. Activating the adjusting cylinder 302 again moves the rear loading plate 303 backward. The backward movement of the rear loading plate 303 moves the sampling tube 304 and the drill bit 305 backward simultaneously. The backward movement of the drill bit 305 causes the ejector thread 311 to cut off the collected tree core end. When the drill bit 305 has fully moved to the outside of the tree, the sampling of the tree core is quickly completed. Finally, the sample collection dish 402 is reversed so that its lower end disengages from the inner cavity of the positioning screw groove 401. The control dish lid 403 is reversed and detached from the surface of the sample collection dish 402. At this time, the sampling rod 310 is taken out first, and then the inlet end of the sample collection dish 402 is inserted into the outer surface of the rear end of the sampling tube 304. Then, the sampling rod 310 is inserted into the inner cavity of the front end of the drill bit 305, and then the sampling rod 310 is pushed backward. Pushing the sampling rod 310 backward can drive the sample backward. When the sample fully enters the interior of the sample collection dish 402, the sample collection is quickly completed. Then, the dish lid 403 is rotated to the upper end of the sample collection dish 402. Finally, the sample collection dish 402 is rotated into the corresponding positioning screw groove 401. The multiple positioning screw grooves 401 number the sample collection dishes 402 in sequence, so that the collected samples can be automatically numbered. Maintenance of the internal structure of positioning component 2: First, reverse the control of locking rod 219 to move it upward. When the lower end of locking rod 219 is fully disengaged from the inner cavity of lock hole 217, pull the cover 216 to the left to disengage it from U-shaped insertion hole 213. This allows maintenance personnel to lubricate the transmission components, completing the maintenance of the internal structure of positioning component 2 and effectively improving the service life of positioning component 2. Then, push the cover 216 to the right to enter the U-shaped slot 214. At this time, control the control of locking rod 219 to rotate forward so that its lower end re-enters the inner cavity of lock hole 217. This quickly completes the locking of cover 216, effectively protecting the transmission components in positioning component 2 from external environmental contamination.

[0051] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A portable forest cultivation sample collector, characterized in that, include: The main mounting plate (1) has an arc groove on the front. A positioning component (2) for clamping trees is installed on the back of the main mounting plate (1). A sampling component (3) for sampling the inner core of the tree is installed at the center of the upper back of the main mounting plate (1). A collection component (4) for collecting samples is provided on the upper surface of the rear end of the positioning component (2). A control box (5) for electrically connecting various electrical components is installed at the center of the back of the positioning component (2). A multi-button (6) for controlling the drive of various electrical components is installed on the upper surface of the left rear end of the positioning component (2). The positioning component (2) includes a clamping unit, an automatic positioning unit and a maintenance unit. The clamping unit is installed on the back of the main mounting plate (1) and the clamping end is located in front of the main mounting plate (1). The automatic positioning unit is installed at the front end of the clamping unit and the maintenance unit is installed at the rear end of the clamping unit.

2. The portable forest cultivation sample collector according to claim 1, characterized in that, The clamping unit includes a frame (201), the front end of which is fixedly connected to the back of both ends of the main mounting plate (1). The center of both sides of the frame (201) is rotatably connected to a main adjusting screw (202) with reverse threads on its surface via bearings. A servo motor (203) is fixedly mounted on the right side of the frame (201) via a base. The output end of the left side of the servo motor (203) is fixedly connected to the right end of the main adjusting screw (202) via a coupling. Two limiting sliding holes (204) are opened on the front of both ends of the main mounting plate (1). The inner cavity of the two limiting sliding holes (204) is provided with two driven brackets (205) that are threaded to the surface of the main adjusting screw (202). The front of the two driven brackets (205) is rotatably connected to two positioning clamps (206) with opposite clamping surfaces via bearings. A handle (207) is fixedly connected to the back of both ends of the frame (201).

3. A portable forest cultivation sample collector according to claim 2, characterized in that, Anti-slip grooves are provided in the middle area of ​​the two positioning clamps (206) on the side that is close to each other.

4. A portable forest cultivation sample collector according to claim 2, characterized in that, The automatic positioning unit includes two sets of pressure sensors (208), which are embedded in the four corners of the opposite side of the two positioning clamps (206). The ends of the two sets of pressure sensors (208) that are close to each other are respectively connected to a detection cone (209). A front grinding plate (210) is fixedly connected to the rear end of each positioning clamp (206). Two positioning cylinders (211) are fixedly installed at the front ends of the two driven brackets (205) that are far apart from each other. A rear grinding plate (212) is fixedly connected to the front end of each positioning cylinder (211).

5. A portable forest cultivation sample collector according to claim 4, characterized in that, The maintenance unit includes a U-shaped socket (213), which is located on the left side of the frame (201). The inner wall of the right side of the frame (201) is provided with a U-shaped slot (214) of the same size as the U-shaped socket (213). The upper and lower sides of the back of the main mounting plate (1) are provided with rail grooves (215) of the same width as the U-shaped socket (213) and the U-shaped slot (214).

6. A portable forest cultivation sample collector according to claim 5, characterized in that, The U-shaped insertion hole (213) and the U-shaped slot (214) are both fitted with a cover (216) that slides against the inner wall of the rail groove (215). The upper surface of the right end of the cover (216) is provided with a lock hole (217). A lock block (218) is fixedly connected to the top of the inner wall of the right side of the frame (201). The lock block (218) and the inner wall of the lock hole (217) are both threaded with a lock rod (219).

7. A portable forest cultivation sample collector according to claim 6, characterized in that, The sampling assembly (3) includes an auxiliary mounting plate (301). The lower end of the auxiliary mounting plate (301) is fixedly connected to the back of the upper end of the main mounting plate (1) by bolts. An adjustment cylinder (302) is fixedly installed on the back of the upper end of the auxiliary mounting plate (301). A rear mounting plate (303) is fixedly connected to the piston rod end of the rear side of the adjustment cylinder (302). A sampling tube (304) is rotatably connected to the front of the lower end of the rear mounting plate (303) by bearings. A drill bit (305) communicating with its inner cavity is fixedly connected to the front end of the sampling tube (304). A lower driven gear (306) is fixedly connected to the outer surface of the rear end of the sampling tube (304). A stepper motor (307) is fixedly installed on the back of the rear mounting plate (303). An upper drive gear (308) meshing with the lower driven gear (306) is fixedly sleeved on the output shaft surface of the rear end of the stepper motor (307).

8. A portable forest cultivation sample collector according to claim 7, characterized in that, A magnetic ring (309) is fixedly sleeved on the outer surface of the rear end of the sampling tube (304), and an iron sampling rod (310) is movably inserted into the inner cavity of the sampling tube (304).

9. A portable forest cultivation sample collector according to claim 8, characterized in that, The inner wall of the front end of the drill bit (305) is provided with a stripping thread (311).

10. A portable forest cultivation sample collector according to claim 9, characterized in that, The collecting component (4) includes multiple positioning screw grooves (401), which are respectively opened on the upper surface of the rear end of the stand (201). Each positioning screw groove (401) has a sample collection dish (402) threadedly connected to its inner cavity, and a dish cover (403) is threadedly connected to the upper surface of each sample collection dish (402).

Images