Forestry tree measuring device

Abstract

The invention provides a forestry tree measuring device, and relates to the technical field of sampling equipment, a main barrel of the measuring device is provided with a communicated annular groove and a radial hole located in the side wall of the annular groove; the straight cutting barrel sleeves the inner side of the main barrel and is in axial sliding connection with the fixing part; the straight cutting barrel is provided with a spiral groove; one end of each rotary cutting blade is provided with a wedge-shaped surface, and the other end of each rotary cutting blade extends out of the main barrel; the two sides of each rotary cutting edge are connected with the main barrel through elastic pieces. The rotating part drives the main barrel to rotate, the main barrel drives the rotary cutting blade to rotate through the elastic piece, the rotary cutting blade stops rotating when touching a tough object, the main barrel still drives the jacking mechanism to rotate, and the jacking mechanism slides along the wedge-shaped face of the rotary cutting blade and axially moves relative to the main barrel till the relative rotating displacement of the main barrel and the rotary cutting blade is larger than or equal to a threshold value. The jacking mechanism presses the clamping piece to penetrate through the radial hole and be clamped in the spiral groove, so that the straight cutting barrel axially moves to cut or push away a tough object, and the forestry tree measuring device can continue sampling.

Description

Technical Field

[0001] The invention relates to the technical field of sampling equipment, in particular to a forestry tree measuring device. Background Art

[0002] Forestry tree management requires regular tree inspection and management, and inspection work includes inspection of the tree root system. Existing root system inspection sampling devices usually use a rotating method to sample. After the sample is collected and put into the sampling barrel, it will rotate with the sampling barrel, which may cause the sample to twist and affect the inspection effect. In addition, the existing root system inspection sampling device is difficult to continue sampling when it encounters a tough object during the rotating sampling process.

[0003] The information disclosed in the background technology section of this application is only intended to deepen the understanding of the general background technology of this application, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0004] Based on this, it is necessary to provide a forestry tree measuring device to address the problem that the current root detection sampling device is difficult to continue sampling when encountering a tough object during the rotating sampling process.

[0005] The above purpose is achieved through the following technical solutions: A forestry tree measuring device, comprising: A drive assembly including a rotating portion and a fixed portion that are rotatably connected; The sampling assembly comprises a main barrel, a straight cutting barrel, a lifting mechanism, a clamping member, a plurality of rotary cutting blades and a plurality of elastic members; the main barrel is connected to the rotating part, and the main barrel is provided with an annular mounting groove, a radial hole connected to the mounting groove and a plurality of mounting holes penetrating the mounting groove; the straight cutting barrel is sleeved on the inner side of the main barrel, and the straight cutting barrel is axially slidably connected to the fixing part; the outer side wall of the straight cutting barrel is provided with a spiral groove; the lifting mechanism is located in the mounting groove and is axially slidably connected to the main barrel; one end of the rotary cutting blade is provided with a wedge-shaped surface abutting against the lifting mechanism, and the other end of the rotary cutting blade passes through the Mounting hole; one elastic member is respectively connected to both sides of the length direction of the rotary cutting blade, and the elastic member is connected to the side wall of the mounting hole; the clamping member is slidably arranged in the radial hole; when the relative rotational displacement between the main barrel and the rotary cutting blade is greater than or equal to a threshold value, the lifting mechanism can slide along the wedge surface to the axial end surface of the rotary cutting blade, and at this time, the lifting mechanism can force the clamping member to pass through the radial hole and clamp in the spiral groove; when the main barrel continues to rotate relative to the rotary cutting blade, the main barrel can drive the clamping member to move along the spiral groove, so that the straight cutting barrel moves axially relative to the fixed part.

[0006] Furthermore, the lifting mechanism includes a connecting ring and a plurality of pushing rods circumferentially arranged on the connecting ring; the main barrel is provided with a connecting groove cooperating with the connecting ring and a lifting hole cooperating with the pushing rod, and the connecting ring can move axially along the main barrel in the connecting groove; the end face of the connecting ring away from the pushing rod is movably connected to the clamping piece; the pushing rod is used to abut the wedge surface.

[0007] Furthermore, the clamping member is spherical.

[0008] Furthermore, the rotary cutting blade includes a first mounting portion, a second mounting portion and a first cutting portion connected in sequence; the first mounting portion cooperates with the mounting groove; the second mounting portion cooperates with the mounting hole; the dimensions of the first mounting portion and the first cutting portion along the radial direction of the main barrel are both greater than the radial width of the mounting hole.

[0009] Furthermore, the plurality of rotary cutting blades are distributed at intervals, and the gaps between adjacent first cutting parts form cutting grooves.

[0010] Furthermore, the inner wall of the main barrel and the outer wall of the rotating part are both provided with threads, and the main barrel is threadedly connected to the rotating part.

[0011] Furthermore, the straight-cut barrel is sleeved on the outside of the fixing portion; the shaft end of the straight-cut barrel is connected to the fixing portion via a magnetic adsorption structure or an elastic telescopic structure.

[0012] Furthermore, a limiting block is provided on the outer side of the fixing portion; and an axially extending limiting groove is provided on the inner side of the straight-cut barrel, and the limiting groove cooperates with the limiting block.

[0013] Furthermore, one end of the straight-cut barrel away from the fixing portion is chamfered to form a second cutting portion.

[0014] Furthermore, the elastic member is a spring.

[0015] The beneficial effects of the present invention are: When sampling, the forestry tree measuring device of the present invention manually holds the driving assembly and presses it toward the sampling site, the rotating part drives the main barrel to rotate, and the main barrel drives the rotary cutting blade to rotate through the elastic member, the rotary cutting blade cuts the sampling site, and the sample enters the straight cutting barrel without rotating, so that the sample maintains its original state and the detection result is more accurate; when the rotary cutting blade hits a tough object, the rotary cutting blade is forced to stop rotating, and the main barrel still rotates relative to the rotary cutting blade. At this time, the lifting mechanism slides along the wedge surface of the rotary cutting blade, and the lifting mechanism is axially displaced relative to the main barrel until the relative rotational displacement between the main barrel and the rotary cutting blade is greater than or equal to a threshold value, and the lifting mechanism slides to the axial end face of the rotary cutting blade. At this time, the lifting mechanism can press the clamping part to pass through the radial hole and clamp in the spiral groove. As the main barrel continues to rotate, the main barrel drives the clamping part to slide in the spiral groove. Since the axial position of the clamping part remains relatively unchanged, the straight cutting barrel moves axially to cut the tough object or push it away, so that the forestry tree measuring device can continue to sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a forestry tree measuring device according to an embodiment of the present invention; Figure 2 A bottom view of a forestry tree measuring device according to an embodiment of the present invention; Figure 3 for Figure 2 Middle AA section view; Figure 4 A partial cross-sectional view of a main barrel according to an embodiment of the present invention; Figure 5 A front view of a sampling assembly according to an embodiment of the present invention; Figure 6 for Figure 5 Middle BB section view; Figure 7 It is a schematic structural diagram of a cutting edge and a lifting mechanism according to an embodiment of the present invention; Figure 8 It is a schematic structural diagram of a straight-cut barrel according to an embodiment of the present invention.

[0017] Among them: 100, driving assembly; 200, sampling assembly; 201, main barrel; 2011, mounting hole; 2012, connecting groove; 2013, lifting hole; 202, straight cutting barrel; 2021, spiral groove; 2022, second cutting part; 2023, limiting groove; 203, clamping part; 204, rotary cutting blade; 2041, wedge surface; 2042, first mounting part; 2043, second mounting part; 2044, first cutting part; 205, elastic part; 206, connecting ring; 207, push rod. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0020] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0021] Combine the following Figure 1-Figure 8 , describing a forestry tree measuring device according to an embodiment of the present invention.

[0022] A forestry tree measuring device comprises: a driving assembly 100, comprising a rotating part and a fixed part connected in rotation; a sampling assembly 200, comprising a main barrel 201, a straight cutting barrel 202, a lifting mechanism, a clamping member 203, a plurality of rotary cutting blades 204 and a plurality of elastic members 205; the main barrel 201 is connected to the rotating part, and the main barrel 201 is provided with an annular mounting groove, a radial hole connected to the mounting groove and a plurality of mounting holes 2011 penetrating the mounting groove; the straight cutting barrel 202 is sleeved on the inner side of the main barrel 201, and the straight cutting barrel 202 is axially slidably connected to the fixed part; a spiral groove 2021 is provided on the outer wall of the straight cutting barrel 202; the lifting mechanism is located in the mounting groove and is axially slidably connected to the main barrel 201; one end of the rotary cutting blade 204 is provided with a wedge surface 2041 abutting against the lifting mechanism, and the other end of the rotary cutting blade 204 penetrates the fixing part; the fixing part is connected to the main barrel 201 through ... Through the mounting hole 2011; an elastic member 205 is respectively connected to both sides of the length direction of the rotary cutting blade 204, and the elastic member 205 is connected to the side wall of the mounting hole 2011; the clamping member 203 is slidably arranged in the radial hole; when the relative rotational displacement between the main barrel 201 and the rotary cutting blade 204 is greater than or equal to the threshold, the wedge surface 2041 drives the lifting mechanism to move axially, so that the lifting mechanism moves to the axial end face of the rotary cutting blade 204, and the lifting mechanism will contact the clamping member 203 during the axial movement, and the lifting mechanism drives the clamping member to move along the radial hole, and finally the clamping member 203 passes through the radial hole and is clamped in the spiral groove 2021; when the main barrel 201 continues to rotate relative to the rotary cutting blade 204, the main barrel 201 can drive the clamping member 203 to move along the spiral groove 2021, so that the straight cutting barrel 202 moves axially relative to the fixed part.

[0023] In one embodiment, the rotating part may be a motor, and the fixed part may be a motor base.

[0024] Both the main barrel 201 and the straight-cut barrel 202 can be sleeve-shaped. The straight-cut barrel 202 is sleeved outside the fixed part, and the straight-cut barrel 202 can move axially along the fixed part. The main barrel 201 is sleeved outside the straight-cut barrel 202, and the main barrel 201 is connected to the rotating part.

[0025] The rotary cutting blade 204 is mounted on the main barrel 201 , and a portion of the rotary cutting blade 204 extends from the mounting hole 2011 of the main barrel 201 and is used to cut the sampling site.

[0026] The straight cutting barrel 202 is located in the inner cavity of the main barrel 201. The end surface of the main barrel 201 away from the end of the rotary cutting blade 204 is the first reference plane. Before sampling, the distance between the end of the straight cutting barrel 202 and the first reference plane is a, and the distance between the end of the rotary cutting blade 204 and the first reference plane is b, b>a. It should be noted that the end here refers to the part close to the rotary cutting blade 204 for cutting.

[0027] The plane passing through the central axis of the radial hole and parallel to the axial end surface of the main barrel 201 is the second reference plane, the side of the second reference plane close to the driving assembly 100 is the upper side, and the side of the second reference plane away from the driving assembly 100 is the lower side. Before sampling, at least a part of the spiral groove 2021 is located on the upper side of the second reference plane, so that when the clamping member 203 slides along the spiral groove 2021, the straight cutting barrel 202 moves axially toward the end of the rotary cutting blade 204 to cut off or push away the tough object that hinders the rotary cutting blade 204. The pitch, lead, helix angle and hand direction of the spiral groove 2021 can be set as needed.

[0028] When sampling, the forestry tree measuring device manually holds the fixed part and presses it toward the sampling site. The rotating part drives the main barrel 201 to rotate, and the main barrel 201 drives the rotary blade 204 to rotate through the elastic member 205. When the rotary blade 204 cuts the sampling site, the rotary blade 204 will be subjected to a tangential force. At this time, a relative rotation with a small displacement may occur between the rotary blade 204 and the main barrel 201, but the relative rotation displacement is less than the threshold value. The lifting mechanism will climb along the wedge surface 2041 but will not force the clamping member 203 to slide along the radial hole, and the sample will enter the inner cavity of the straight cutting barrel 202. The sample will not rotate after entering the straight cutting barrel 202, so that the sample remains in its original state, making the detection result more accurate. When the rotary blade 204 hits a tough object, the rotary blade 204 is forced to stop rotating, while the main barrel 201 still rotates relative to the rotary blade 204. At this time, the lifting mechanism slides along the wedge surface 2041 of the rotary blade 204, and the lifting mechanism moves axially relative to the main barrel 201 until the relative rotation displacement between the main barrel 201 and the rotary blade 204 is greater than or equal to the threshold value, and the lifting mechanism slides to the axial end surface of the rotary blade 204. The lifting mechanism contacts the clamping member 203 during the axial movement, and the lifting mechanism drives the clamping member to move along the radial hole, and finally the clamping member 203 passes through the radial hole and is clamped in the spiral groove 2021. As the main barrel 201 continues to rotate, the main barrel 201 drives the clamping member 203 to slide in the spiral groove 2021. Since the axial position of the clamping member 203 remains relatively unchanged, the straight cutting barrel 202 moves axially to cut the tough object or push it away, so that the forestry tree measurement device can continue to sample.

[0029] It should be noted that the lifting mechanism is axially slidingly connected to the main barrel 201, and the circumferential direction of the lifting mechanism is limited by the main barrel 201. The rotation of the main barrel 201 will drive the lifting mechanism to rotate together.

[0030] In one embodiment, the lifting mechanism includes a connecting ring 206 and a plurality of pushing rods 207 circumferentially arranged on the connecting ring 206; the main barrel 201 is provided with a connecting groove 2012 cooperating with the connecting ring 206 and a lifting hole 2013 cooperating with the pushing rod 207, and the connecting ring 206 can move axially along the main barrel 201 in the connecting groove 2012; the end surface of the connecting ring 206 away from the pushing rod 207 is used to abut the clamping part 203 and drive the clamping part 203 to move along the radial hole; the pushing rod 207 is used to abut the wedge surface 2041.

[0031] A plurality of push rods 207 are evenly distributed on the connecting ring 206 along the circumference of the connecting ring 206. The number of push rods 207 can be the same as the number of the rotary cutting blades 204, for example, 4. The connecting groove 2012 is an annular groove. The width of the connecting groove 2012 in the axial direction of the main barrel 201 is greater than the width of the connecting ring 206. The connecting ring 206 can only move axially in the connecting groove 2012. When the end surface of the connecting ring 206 connected to the push rod 207 contacts the wall of the connecting groove 2012, the push rod 207 contacts the wedge surface 2041 of the rotary cutting blade 204; when the push rod 207 slides along the wedge surface 2041 to the axial end surface of the rotary cutting blade 204, the connecting ring 206 moves to be opposite to the radial hole, and the clamping member 203 moves along the radial hole to the spiral groove 2021 under the drive of the connecting ring 206.

[0032] The end of the connecting ring 206 close to the clamping member 203 may be, but is not limited to, a plane parallel to the axial end surface of the main barrel 201 .

[0033] In other embodiments, the end of the connecting ring 206 close to the clamping member 203 may also be a triangular protrusion or a wedge-shaped surface 2041 .

[0034] In one embodiment, the clamping member 203 may be spherical.

[0035] The cross section of the spiral groove 2021 is arc-shaped, the diameter of the clamping member 203 is greater than the length of the radial hole, and the radius of the clamping member 203 is less than or equal to the radius of the spiral groove 2021. When the connecting ring 206 does not contact the clamping member 203, a part of the clamping member 203 is located in the radial hole, and the other part extends out of the radial hole and is located in the connecting groove 2012; when the connecting ring 206 presses the clamping member 203, the clamping member 203 slides along the radial hole into the spiral groove 2021, at this time, a part of the clamping member 203 is located in the spiral groove 2021, and the other part is located in the radial hole, and the rotation of the main barrel 201 can drive the clamping member 203 to rotate together, so that the clamping member 203 can slide in the spiral groove 2021.

[0036] In one embodiment, the radial hole can be a conical hole, the diameter of one end of the radial hole close to the spiral groove 2021 is greater than or equal to the diameter of the clamping member 203, and the diameter of one end of the radial hole away from the spiral groove 2021 is smaller than the diameter of the clamping member 203. The clamping member 203 can be made of metal material. The forestry tree measuring device can also include an annular magnet, which can be sleeved on the outer side of the main barrel 201 and fixedly connected to the main barrel 201, and the annular magnet corresponds to the radial hole in the axial direction of the main barrel 201. When the connecting ring 206 does not move to the position corresponding to the radial hole, the annular magnet attracts the clamping member 203 to move toward the side of the connecting groove 2012, but the shape of the radial hole can limit the clamping member 203 from escaping from the radial hole and sliding into the connecting groove 2012. When the connecting ring 206 moves to the position corresponding to the radial hole, the connecting ring 206 has a certain blocking effect on the magnetic force of the annular magnet, and the connecting ring 206 can press the clamping member 203 to move along the radial hole and clamp in the spiral groove 2021.

[0037] In one embodiment, the rotary cutting blade 204 includes a first mounting portion 2042, a second mounting portion 2043 and a first cutting portion 2044 which are connected in sequence; the first mounting portion 2042 cooperates with the mounting groove; the second mounting portion 2043 cooperates with the mounting hole 2011; the dimensions of the first mounting portion 2042 and the first cutting portion 2044 along the radial direction of the main barrel 201 are both greater than the radial width of the mounting hole 2011.

[0038] The length of the first mounting portion 2042 in the axial direction of the main barrel 201 is smaller than the depth of the mounting groove, so that when the first mounting portion 2042 slides in the mounting groove, the end surface of the first mounting portion 2042 away from the second mounting portion 2043 will not generate friction with the side wall of the mounting groove, affecting the sliding of the first mounting portion 2042. The dimensions of the first mounting portion 2042 and the first cutting portion 2044 in the radial direction of the main barrel 201 are both larger than the radial width of the mounting hole 2011, so that the main barrel 201 has an axial limit effect on the rotary cutting blade 204, preventing the rotary cutting blade 204 from axially moving relative to the main barrel 201 during the sampling process.

[0039] The cross section of the first cutting portion 2044 may be triangular, so that the first cutting portion 2044 can be inserted into the ground more smoothly.

[0040] In one embodiment, the plurality of rotary cutting blades 204 are distributed at intervals, and the gaps between adjacent first cutting portions 2044 form cutting grooves.

[0041] The axial length of the straight cutting barrel 202 is less than the distance between the end surface of the main barrel 201 close to the driving assembly 100 and the end of the rotary cutting blade 204. When the rotary cutting blade 204 is inserted into the ground and rotates, the soil outside the main barrel 201 can enter the inside of the straight cutting barrel 202 from the cutting groove; when there are tree roots or other roots in the cutting groove, the rotary cutting blade 204 can cut them off. When a relatively hard root is stuck in the cutting groove, the straight cutting barrel 202 can move outward axially to cut the root.

[0042] In one embodiment, the inner wall of the main barrel 201 and the outer wall of the rotating part are both provided with threads, and the main barrel 201 is threadedly connected to the rotating part.

[0043] During the sampling process, the roots and soil to be sampled are located inside the straight-cut barrel 202. When impurities affect the removal of the straight-cut barrel 202 from the fixed part, the main barrel 201 can be detached from the rotating part, so that the straight-cut barrel 202 can be detached from the fixed part to facilitate sampling. The main barrel 201 is threadedly connected to the rotating part, and the connection method is simple. It should be noted that the thread rotation direction of the main barrel 201 and the rotating part is set as needed, so that the main barrel 201 will not be detached from the rotating part during the rotation of the main barrel 201 driven by the rotating part.

[0044] In one embodiment, the straight-cut barrel 202 is sleeved on the outside of the fixing portion; the shaft end of the straight-cut barrel 202 is connected to the fixing portion via a magnetic adsorption structure or an elastic telescopic structure.

[0045] The magnetic adsorption structure may be a pair of magnets with opposite polarities attracting each other. The magnets may be ring-shaped, one of the magnets is fixed on the straight-cut barrel 202, and the other magnet is fixed on the fixing portion.

[0046] The elastic telescopic structure may be a spring, one end of which is fixedly connected to the fixing portion, and the other end of which is fixedly connected to the straight-cut barrel 202 .

[0047] In one embodiment, a limiting block is provided on the outer side of the fixing portion; an axially extending limiting groove 2023 is provided on the inner side of the straight-cut barrel 202, and the limiting groove 2023 cooperates with the limiting block.

[0048] The limiting block cooperates with the limiting groove 2023 to limit the axial rotation of the straight cutting barrel 202. When the clamping member 203 slides along the spiral groove 2021, the straight cutting barrel 202 can slide axially along the limiting block.

[0049] In one embodiment, one end of the straight cutting barrel 202 away from the fixing portion is chamfered to form a second cutting portion 2022. The cross section of the second cutting portion 2022 may be a right triangle, and the radial outer side wall of the second cutting portion 2022 is in contact with the inner side wall of the main barrel 201. When a rhizome is stuck in the cutting groove between the rotary cutting blades 204, the second cutting portion 2022 can move axially to cut the rhizome.

[0050] In one embodiment, the elastic member 205 is a spring.

[0051] When the tangential force on the rotary cutting blade 204 is small, the main barrel 201 and the rotary cutting blade 204 may not rotate relative to each other, and the elastic parts 205 on both sides of the single rotary cutting blade 204 do not stretch or shorten; when the tangential force on the rotary cutting blade 204 is large, the main barrel 201 and the rotary cutting blade 204 rotate relative to each other, and one of the elastic parts 205 on both sides of the single rotary cutting blade 204 will be compressed, and the other will be stretched or not deformed.

[0052] It should be noted that whether the elastic member 205 is stretched depends on the connection relationship between the elastic member 205 and the side wall of the mounting hole 2011 and the rotary cutting blade 204. In the initial state, the elastic members 205 on both sides of the rotary cutting blade 204 are at their original length. When the two ends of the elastic member 205 are fixedly connected to the side wall of the mounting hole 2011 and the rotary cutting blade 204, if the rotary cutting blade 204 squeezes one elastic member 205, the rotary cutting blade 204 will stretch the other elastic member 205; when the two ends of the elastic member 205 are movably abutted against the side wall of the mounting hole 2011 and the rotary cutting blade 204, if the rotary cutting blade 204 squeezes one elastic member 205, the other elastic member 205 will be separated from the rotary cutting blade 204 without deformation.

[0053] Working process of forestry tree measuring device: The plane passing through the central axis of the radial hole and parallel to the axial end face of the main barrel 201 is the second reference plane, the side of the second reference plane close to the driving assembly 100 is the upper side, the side of the second reference plane away from the driving assembly 100 is the lower side, and the end of the straight-cut barrel 202 close to the fixed part is the head end.

[0054] Before sampling, the head end of the straight cutting barrel 202 abuts against the fixed part, at least a part of the spiral groove 2021 is located on the upper side of the second reference plane, the end surface where the connecting ring 206 and the push rod 207 are connected contacts the wall of the connecting groove 2012, and the push rod 207 contacts the wedge surface 2041 of the rotary cutting blade 204.

[0055] When sampling, the fixed part is manually held and pressed toward the sampling site, the rotating part drives the main barrel 201 to rotate, the main barrel 201 squeezes the spring, and the spring drives the rotary blade 204 to rotate. When the rotary blade 204 cuts the sampling site, the rotary blade 204 will be subjected to a tangential force. At this time, there will be a relative rotation with a small displacement between the rotary blade 204 and the main barrel 201, but the relative rotation displacement is less than the threshold value, and the push rod 207 will climb along the wedge surface 2041 and drive the connecting ring 206 to slide axially in the connecting groove 2012, but the connecting ring 206 will not force the clamping part 203 to slide along the radial hole, and the sample will enter the inner cavity of the straight cutting barrel 202. The sample will not rotate after entering the straight cutting barrel 202, so that the sample remains in its original state, making the detection result more accurate. When the rotary cutting blade 204 encounters a tough object, such as a tough tree root or a stone, a hard object may be stuck in the cutting groove, and the rotary cutting blade 204 is forced to stop rotating, while the main barrel 201 still rotates relative to the rotary cutting blade 204. At this time, the wedge surface 2041 of the push rod 207 slides, and the connecting ring 206 slides axially in the connecting groove 2012 until the relative rotational displacement between the main barrel 201 and the rotary cutting blade 204 is greater than or equal to a threshold value, and the push rod 207 slides away from the end face of the connecting ring 206 to the axial end face of the rotary cutting blade 204. At this time, the connecting ring 206 corresponds to the radial hole, and the connecting ring 206 presses the clamping part 203 to slide along the radial hole. A part of the clamping part 203 is located in the radial hole, and another part of the clamping part 203 is located in the spiral groove 2021, so that the main barrel 201 can drive the clamping part 203 to rotate. As the main barrel 201 continues to rotate, the main barrel 201 drives the clamping member 203 to slide in the spiral groove 2021, and the clamping member 203 moves toward the head end of the straight cutting barrel 202. Since the axial position of the clamping member 203 remains relatively unchanged, the distance between the clamping member 203 and the head end of the straight cutting barrel 202 decreases, which is equivalent to the straight cutting barrel 202 moving toward the cutting groove side of the rotary cutting blade 204, so that the straight cutting barrel 202 axially pushes or cuts off the tough object, so that the forestry tree measuring device can continue to sample. After the tough object is pushed away or cut off, it no longer blocks the rotary cutting blade 204. The elastic member 205 between the main barrel 201 and the rotary cutting blade 204 restores its original length, so that the circumferential position between the rotary cutting blade 204 and the main barrel 201 returns to its initial state. At this time, the rotary cutting blade 204 The wedge surface 2041 rotates again to the bottom of the push rod 207, and the push rod 207 moves down along the wedge surface 2041, so that the connecting ring 206 and the push rod 207 return to the initial axial position. At this time, the clamping part 203 moves to one side of the connecting groove 2012 under the attraction of the annular magnet, and the clamping part 203 disengages from the spiral groove 2021 and moves into the radial hole. The clamping part 203 no longer restricts the axial movement of the straight cutting barrel 202. At this time, the straight cutting barrel 202 can be pressed axially, so that the straight cutting barrel 202 moves to the fixed part and is connected to the fixed part (the axial end of the straight cutting barrel 202 is connected to the fixed part through a magnetic adsorption structure or an elastic telescopic structure). At this time, the spiral groove moves to the initial position and corresponds to the radial hole, and the forestry tree measuring device can perform sampling again.

[0056] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above-described embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A forestry tree measuring device, characterized in that: include: A drive assembly including a rotating portion and a fixed portion that are rotatably connected; The sampling assembly comprises a main barrel, a straight cutting barrel, a lifting mechanism, a clamping member, a plurality of rotary cutting blades and a plurality of elastic members; the main barrel is connected to the rotating part, and the main barrel is provided with an annular mounting groove, a radial hole connected to the mounting groove and a plurality of mounting holes penetrating the mounting groove; the straight cutting barrel is sleeved on the inner side of the main barrel, and the straight cutting barrel is axially slidably connected to the fixing part; the outer side wall of the straight cutting barrel is provided with a spiral groove; the lifting mechanism is located in the mounting groove and is axially slidably connected to the main barrel; one end of the rotary cutting blade is provided with a wedge-shaped surface abutting against the lifting mechanism, and the other end of the rotary cutting blade passes through the Mounting hole; one elastic member is respectively connected to both sides of the length direction of the rotary cutting blade, and the elastic member is connected to the side wall of the mounting hole; the clamping member is slidably arranged in the radial hole; when the relative rotational displacement between the main barrel and the rotary cutting blade is greater than or equal to a threshold value, the lifting mechanism can slide along the wedge surface to the axial end surface of the rotary cutting blade, and at this time, the lifting mechanism can force the clamping member to pass through the radial hole and clamp in the spiral groove; when the main barrel continues to rotate relative to the rotary cutting blade, the main barrel can drive the clamping member to move along the spiral groove, so that the straight cutting barrel moves axially relative to the fixed part.

2. The forestry tree measuring device according to claim 1, characterized in that: The lifting mechanism includes a connecting ring and a plurality of pushing rods circumferentially arranged on the connecting ring; the main barrel is provided with a connecting groove cooperating with the connecting ring and a lifting hole cooperating with the pushing rod, and the connecting ring can move axially along the main barrel in the connecting groove; the end face of the connecting ring away from the pushing rod is movably connected to the clamping piece; the pushing rod is used to abut the wedge surface.

3. The forestry tree measuring device according to claim 2, characterized in that: The clamping piece is spherical.

4. The forestry tree measuring device according to claim 1, characterized in that: The rotary cutting blade includes a first mounting portion, a second mounting portion and a first cutting portion which are connected in sequence; the first mounting portion cooperates with the mounting groove; the second mounting portion cooperates with the mounting hole; the dimensions of the first mounting portion and the first cutting portion along the radial direction of the main barrel are both greater than the radial width of the mounting hole.

5. The forestry tree measuring device according to claim 4, characterized in that: The plurality of rotary cutting blades are distributed at intervals, and the gaps between adjacent first cutting parts form cutting grooves.

6. The forestry tree measuring device according to claim 1, characterized in that: The inner wall of the main barrel and the outer wall of the rotating part are both provided with threads, and the main barrel is threadedly connected with the rotating part.

7. The forestry tree measuring device according to claim 1, characterized in that: The straight-cut barrel is sleeved on the outside of the fixing part; the shaft end of the straight-cut barrel is connected to the fixing part via a magnetic adsorption structure or an elastic telescopic structure.

8. The forestry tree measuring device according to claim 7, characterized in that: A limiting block is arranged on the outer side of the fixing portion; and an axially extending limiting groove is arranged on the inner side of the straight-cut barrel, and the limiting groove cooperates with the limiting block.

9. The forestry tree measuring device according to claim 7, characterized in that: One end of the straight-cut barrel away from the fixing portion is chamfered to form a second cutting portion.

10. The forestry tree measuring device according to claim 1, characterized in that: The elastic member is a spring.

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