A tree diameter measuring device

Abstract

The present invention relates to the technical field of tree diameter measurement, and discloses a tree diameter measuring device, comprising a support base, a side measuring mechanism, and a front measuring mechanism; the front measuring mechanism comprising a vertical beam disposed in the middle of the support base, the end of the vertical beam being slidably connected to a top rod, the end of the vertical beam being provided with a front distance measuring assembly for detecting the distance the top rod moves relative to the vertical beam; the side measuring mechanism comprising a horizontal beam disposed on both sides of the support base, the horizontal beam being slidably connected to a sliding base, the side of the sliding base being provided with an L-shaped bracket, the end of the L-shaped bracket being provided with a contact rod, the contact rod and the top rod being provided at the same height, and the horizontal beam being provided with a side distance measuring assembly for detecting the distance the sliding base moves relative to the horizontal beam. By providing a top rod that moves forward and backward and an L-shaped bracket that moves left and right, the present invention enables the measuring device to simultaneously measure two diameters of a tree in both the front-to-back and left-to-right directions during a single measurement.

Description

Technical Field

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

[0002] Diameter is a key indicator of tree growth. Regularly measuring tree diameter can help us understand a tree's growth rate, assess its health, and determine whether it's experiencing environmental impacts or pests and diseases. For example, if a tree's diameter grows slowly over a period of time, it may indicate growth stress. Further investigation is needed to determine the cause and appropriate measures, such as fertilization, watering, or pest and disease control.

[0003] Common tree measuring equipment is simply two movable rods. When measuring, the two rods are placed on both sides of the tree to obtain the diameter of the tree in a certain direction. However, the cross-section of some trees is not completely regular, and multiple repeated measurements are required during measurement, which affects efficiency. Therefore, it needs to be improved. Summary of the Invention

[0004] The present invention provides a tree diameter measuring device, which solves the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A tree diameter measuring device includes a support base, a side measurement mechanism, and a front measurement mechanism. The front measurement mechanism includes a vertical beam disposed in the middle of the support base, with a top rod slidably connected to the end of the vertical beam. The end of the vertical beam is provided with a front distance measurement assembly for detecting the distance the top rod moves relative to the vertical beam. The side measurement mechanism includes horizontal beams disposed on both sides of the support base, with a sliding base slidably connected to the horizontal beam, an L-shaped bracket disposed on the side of the sliding base, and a contact rod disposed at the end of the L-shaped bracket. The contact rod and the top rod are arranged at the same height. The horizontal beam is provided with a side distance measurement assembly for detecting the distance the sliding base moves relative to the horizontal beam. The directions of movement of the sliding base and the top rod are perpendicular to each other, the contact rod and the top rod are arranged perpendicular to each other, and the axis lines of the contact rods on both sides are arranged collinearly. The end of the top rod is provided with a top plate, and the end of the contact rod is provided with a contact roller.

[0007] As a preferred technical solution of the present invention, a winding roller is provided on the side of the vertical beam close to the support seat, a tensioning belt is wrapped around the outside of the winding roller, a plumb bob is provided at the free end of the tensioning belt, a mounting bracket is provided at the end of the top rod away from the top plate, the mounting bracket is rotatably connected to a guide wheel that cooperates with the tensioning belt, the tensioning belt passes through the gap between the guide wheel and the mounting bracket, the diameter of the plumb bob is larger than the width of the gap between the guide wheel and the mounting bracket, and a tension spring is provided between the sliding seat and the support seat to drive the sliding seat to move toward the support seat.

[0008] As a preferred technical solution of the present invention, the front distance measurement assembly includes a measuring frame mounted at the end of a vertical beam, the measuring frame being rotatably connected to a measuring roller, a traction belt wrapped around the outside of the measuring roller, and the end of the traction belt away from the measuring roller being connected to a push rod. The measuring roller is provided with a limit slot on its side, with multiple limit slots distributed circumferentially relative to the axis of the measuring roller. A first limit slide is slidably connected to the measuring frame, and a first limit head is provided on the side of the first limit slide proximate to the measuring roller, which engages with the limit slot. A first limit spring is provided between the first limit head and the measuring frame to drive the first limit slide toward the measuring roller.

[0009] As a preferred technical solution of the present invention, the side distance measuring assembly includes a sliding sleeve slidably connected to the crossbeam, the sliding sleeve is arranged on the side of the sliding seat away from the support seat, a rack is provided on the side of the crossbeam, and an extension frame is provided on the side of the sliding sleeve. The extension frame is slidably connected to a second limiting slide rod, and a second limiting head cooperating with the rack is provided at the end of the second limiting slide rod, and a second limiting spring is provided between the second limiting head and the extension frame to drive the second limiting slide rod to move toward the rack.

[0010] As a preferred technical solution of the present invention, a first rotating seat is provided on the side of the support seat, and the first rotating seat is rotatably connected to the ends of the horizontal beam and the vertical beam, and the support seat is provided with an expansion limit assembly that limits the horizontal beam and the vertical beam to be in the same plane as the support seat. The expansion limit assembly includes a pin sleeve provided on the side of the horizontal beam and the vertical beam close to the support seat, a slide is provided on the outside of the support seat, and the slide is slidably connected to a protruding pin that cooperates with the pin sleeve, the middle part of the support seat is rotatably connected to a turntable, the outside of the turntable is rotatably connected to the expansion rod, and the end of the expansion rod away from the turntable is rotatably connected to the protruding pin, after the horizontal beam and the vertical beam are rotated to the same plane as the support seat, the ends of the horizontal beam and the vertical beam are fitted with the side of the support seat, and after the protruding pin is extended into the pin sleeve, the angle of the horizontal beam and the vertical beam with the first rotating seat is locked.

[0011] As a preferred technical solution of the present invention, a second rotating seat is provided on the side of the sliding seat that is rotatably connected to the L-shaped bracket, and a fixed block is provided on the side of the sliding seat away from the L-shaped bracket, and the fixed block is slidably connected to a sliding column, and a support plate is provided at the end of the sliding column, and a U-shaped clamp is provided at the end of the support plate close to the L-shaped bracket. When the L-shaped bracket is arranged vertically with the sliding seat, a limit plate is provided on the end of the sliding column away from the support plate, and a reset spring is provided between the limit plate and the fixed block to drive the support plate to move toward the direction of the L-shaped bracket.

[0012] The present invention has the following benefits:

[0013] By setting up a top rod that moves forward and backward and an L-shaped bracket that moves left and right, the measuring device can simultaneously measure the two diameters of the tree in the front-to-back direction and the left-to-right direction during one measurement process. On the one hand, this improves the measurement efficiency, and on the other hand, the two intersecting data can be compared. In addition, the vertical beam and the horizontal beam can be folded, so that the entire measuring device can be folded into a smaller volume, which is convenient for the operator to carry the measuring device when walking in the mountains and forests. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 The figure is a structural diagram of a tree diameter measuring device.

[0016] Figure 2 A front view of a tree diameter measuring device.

[0017] Figure 3 This is a schematic structural diagram of the front measurement mechanism in a tree diameter measuring device.

[0018] Figure 4 This is a schematic diagram of the structure of a tree diameter measuring device after the tensioning belt is rolled up.

[0019] Figure 5 for Figure 4 Right view of .

[0020] Figure 6 The figure is a schematic diagram of the structure of a measuring frame in a tree diameter measuring device.

[0021] Figure 7 This is a structural schematic diagram of the side measurement mechanism in a tree diameter measuring device.

[0022] Figure 8 The figure is a schematic diagram of the structure of a sliding seat in a tree diameter measuring device.

[0023] Figure 9 This is a schematic diagram of the structure of a side distance measurement component in a tree diameter measuring device.

[0024] Figure 10 This is a schematic diagram of the structure of a tree diameter measuring device after the L-shaped bracket is folded.

[0025] Figure 11This is a schematic diagram of the structure of a tree diameter measuring device after the vertical beam and horizontal beam are folded.

[0026] In the figure: 1. Support base; 2. Side measuring mechanism; 3. Front measuring mechanism; 4. First rotating base; 5. Turntable; 6. Deployment rod; 7. Slide plate; 8. Pin sleeve; 9. Extension pin; 10. Deployment limit assembly; 11. Vertical beam; 12. Horizontal beam; 13. Plumb bob; 14. Winding roller; 15. Guide wheel; 16. Mounting frame; 17. Ejector rod; 18. Top plate; 19. Pulling belt; 20. Measuring frame; 21. Measuring roller; 22. Front distance measuring assembly; 23. Tensioning belt; 24 , first limiting slide bar; 25, first limiting spring; 26, first limiting head; 27, limiting groove; 28, sliding seat; 29, L-shaped bracket; 30, contact rod; 31, side distance measuring assembly; 32, second rotating seat; 33, U-shaped clamp; 34, support plate; 35, fixed block; 36, sliding column; 37, return spring; 38, limiting plate; 39, sliding sleeve; 40, rack; 41, second limiting head; 42, second limiting spring; 43, second limiting slide bar; 44, extension frame. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] In one embodiment, see Figures 1-11 , a tree diameter measuring device, comprising a support base 1, a side measuring mechanism 2 and a front measuring mechanism 3;

[0029] The frontal measurement mechanism 3 includes a vertical beam 11 disposed in the middle of the support base 1. The support base 1 is arranged in a left-right orientation. The vertical beam 11 is vertically disposed in the middle of the upper surface of the support base 1. The upper portion of the vertical beam 11 is slidably connected to a top rod 17 disposed in a front-to-back orientation. A frontal distance measurement assembly 22 is disposed at the top of the vertical beam 11. The frontal distance measurement assembly 22 can measure the distance that the top rod 17 moves forward relative to the vertical beam 11 when the top rod 17 contacts the tree. In other words, the distance that the top rod 17 moves forward relative to the vertical beam 11 when the top rod 17 contacts the tree. The frontal distance measurement assembly 22 can thus measure the frontal diameter of the tree.

[0030] The side measuring mechanism 2 includes a crossbeam 12 provided on both sides of the support base 1. The crossbeam 12 is provided on the left and right sides of the support base 1 in a left-right direction. A sliding seat 28 is slidably connected to the crossbeam 12. The sliding seat 28 can slide left and right along the crossbeam 12. An L-shaped bracket 29 is provided on the rear side of the sliding seat 28. The L-shaped bracket 29 includes a crossbar connected to the rear side of the sliding seat 28 and facing forward and backward, and a vertical bar located at the rear end of the crossbar and facing up and down. The crossbar and the vertical bar form an L-shaped bracket 29 of an L-shaped structure. A contact rod 30 facing left and right is provided at the rear end of the L-shaped bracket 29. The contact rod 30 is provided 0 is fixed to the upper end of the vertical rod of the L-shaped bracket 29 on the side close to the support seat 1, and in order to allow the sliding seat 28 to continue to maintain the trend of moving toward the support seat 1, a tension spring can be set between the sliding seat 28 and the support seat 1, and the sliding seat 28 is pulled by the tension spring to continue to move toward the support seat 1. A side distance measuring component 31 is provided on the crossbeam 12 for detecting the moving distance of the sliding seat 28 relative to the crossbeam 12. The moving directions of the sliding seat 28 and the top rod 17 are perpendicular to each other, the contact rod 30 and the top rod 17 are arranged perpendicular to each other, and the axial center lines of the contact rod 30 on both sides are arranged collinearly.

[0031] In one case of this embodiment, a top plate 18 is provided at the rear end of the top rod 17, and the rear end of the top plate 18 can contact the side wall of the tree, and a contact roller is provided at one end of the contact rod 30 close to the center of the support seat 1, and the contact roller can roll along the side wall of the tree, so as to better allow the contact rod 30 to always maintain contact with the tree, and since a tension spring is provided between the support seat 1 and the sliding seat 28, the tension of the tension spring can continuously keep the contact rod 30 in contact with the tree. When there is no contact with the tree, the two contact rollers on the left and right sides can just support the left and right sides of the top plate 18.

[0032] In one case of this embodiment, a winding roller 14 is provided on the front side of the vertical beam 11, and a tensioning belt 23 is wound around the outside of the winding roller 14. A plumb bob 13 is provided at the free end of the tensioning belt 23. A mounting bracket 16 is provided at the front end of the top rod 17. The mounting bracket 16 is a U-shaped structure with an opening forward. A guide wheel 15 is rotatably connected to the front side of the mounting bracket 16. The tensioning belt 23 can pass through the gap between the rear side of the guide wheel 15 and the mounting bracket 16 from bottom to top, and the diameter of the plumb bob 13 is larger than the gap between the guide wheel 15 and the mounting bracket 16. During normal operation, the tensioning belt 23 is wrapped around the front side of the guide wheel 15, and the gravity of the plumb bob 13 causes the tensioning belt 23 to drive the guide wheel 15 backward, so that the top rod 17 always maintains a tendency to move forward, that is, the rear end of the top rod 17 is always pressed against the outer wall of the tree. However, when the entire top rod 17 needs to be retracted, the tensioning belt 23 is reeled up on the outside of the reeling roller 14. At this time, the top rod 17 is pushed to the frontmost side, and the plumb bob 13 is stuck between the guide wheel 15 and the mounting frame 16. Locking the reeling roller 14 can complete the fixing of the front and rear positions of the top rod 17.

[0033] In one case of this embodiment, the front distance measuring assembly 22 includes a measuring frame 20 provided at the upper end of the vertical beam 11. The measuring frame 20 is a U-shaped structure with an opening upward. A measuring roller 21 is rotatably connected to the upper part of the measuring frame 20. A pulling belt 19 is wound around the outer side of the measuring roller 21. The pulling belt 19 is pulled forward, and the front end of the pulling belt 19 is fixed on the top rod 17. Therefore, when the rear end of the top rod 17 hits the tree, the top rod 17 will move forward relative to the vertical beam 11. At this time, the top rod 17 will pull the pulling belt 19, and the pulling belt 19 will be pulled out. That is to say, the length of the pulling belt 19 pulled out is the distance the top rod 17 moves, and And because the spacing between the top rod 17 and the measuring roller 21 in this application is small, although there is a right triangle between the pulling belt 19, the top rod 17 and the vertical beam 11, and the pulling belt 19 is the hypotenuse of the right triangle, the spacing is small and the initial length of the pulling belt 19 can offset part of the error. The length change of the pulling belt 19 can be approximately identified as the moving distance of the top rod 17, or a table can be set up to record the distance the pulling belt 19 is pulled out and the distance the top rod 17 moves corresponding to the distance the pulling belt 19 is pulled out. After the detection is completed, the length change of the pulling belt 19 is compared with the table to obtain a more accurate distance the top rod 17 moves. The first limit head 26 that cooperates with the limit groove 27 is provided with the first limit spring 25 between the first limit head 26 and the measuring frame 20, and the first limit spring 25 pushes the first limit slide bar 24 to the left, so that the first limit head 26 is fixed in the limit groove 27. When the pulling belt 19 is pulled out, the measuring roller 21 rotates continuously, and the first limit head 26 transfers between different limit grooves 27. Therefore, through the cooperation of the first limit head 26 and the limit groove 27, only when the pulling belt 19 is subjected to force will the measuring roller 21 be driven to rotate, and the measuring roller 21 will not rotate independently, thereby avoiding measurement errors.

[0034] In one case of this embodiment, the side distance measuring assembly 31 includes a sliding sleeve 39 slidably connected to the crossbeam 12, and the sliding sleeve 39 is arranged on the side of the sliding seat 28 away from the support seat 1. A rack 40 facing left and right is arranged on the upper surface of the crossbeam 12, and an extension frame 44 is arranged above the sliding sleeve 39. The extension frame 44 is slidably connected to a vertically arranged second limit slide bar 43, and a second limit head 41 cooperating with the rack 40 is provided at the lower end of the second limit slide bar 43, and a second limit spring 42 is provided between the second limit head 41 and the extension frame 44 to drive the second limit head 41 to move downward. Therefore, when the sliding seat 28 pushes the sliding sleeve 39 to move in the direction away from the support seat 1, the second limit head 41 will move on the rack 40. The cooperation between the second limit head 41 and the rack 40 still prevents the sliding sleeve 39 itself from moving laterally when the sliding sleeve 39 is not subjected to force, thereby improving the measurement accuracy.

[0035] In one case of this embodiment, a first rotating seat 4 is provided on the upper side and left and right sides of the support seat 1. The first rotating seat 4 rotates to connect the ends of the vertical beam 11 and the cross beam 12, and when the cross beams 12 on the left and right sides are rotated to the left and right directions and the upper vertical beam 11 is rotated to a vertical state, the vertical beam 11 and the cross beam 12 are in the same plane. At this time, the rear side of the lower end of the vertical beam 11 is completely in contact with the upper surface of the support seat 1. At this time, the upper end of the vertical beam 11 cannot continue to rotate backward, and the rear side of the cross beam 12 is also in contact with the left and right side surfaces of the support seat 1. At this time, the cross beam 12 cannot continue to rotate backward, thereby limiting the rotation angle, and an expansion limit assembly 10 is provided on the front side of the support seat 1. The expansion limit assembly 10 can limit the forward rotation of the vertical beam 11 and the cross beam 12, thereby completely limiting the vertical beam 11 and the cross beam 12 to only remain straight and in the same plane. The expansion limit assembly 10 includes a slide plate 7 arranged on the upper side of the support seat 1 and on the left and right sides of the support seat 1. The slide plate 7 on the upper side is slidably connected to the protruding pins 9 facing up and down, and the slide plates 7 on the left and right sides are slidably connected to the protruding pins 9 arranged left and right, and a pin shaft sleeve 8 is provided at the lower part of the vertical beam 11 and the end of the cross beam 12 close to the support seat 1. A through hole is provided inside the pin shaft sleeve 8. A turntable 5 is provided on the front side of the support seat 1. The outer side of the turntable 5 is rotatably connected with three expansion rods 6. The ends of the three expansion rods 6 are respectively rotatably connected with the ends of the three protruding pins 9. Therefore, when the turntable 5 rotates, the three protruding pins 9 are simultaneously away from the turntable 5. At this time, the three protruding pins 9 are respectively inserted into the three pin shaft sleeves 8. At this time, the vertical beam 11 and the cross beam 12 will be stuck and cannot rotate. However, when the turntable 5 rotates in the opposite direction, the protruding pin 9 will retract and the protruding pin 9 will be disengaged from the pin shaft sleeve 8. At this time, the vertical beam 11 and the cross beam 12 can rotate forward.

[0036] The rear end of the sliding post 36 is fixedly connected to the supporting plate 34 arranged in a front and rear direction, and the rear end of the supporting plate 34 is provided with a U-shaped clamp 33. The opening of the U-shaped clamp 33 faces upward. When the L-shaped bracket 29 is rotated to the front and rear direction, the U-shaped clamp 33 can be stuck in the lower part of the L-shaped bracket 29. At this time, the L-shaped bracket 29 cannot rotate left and right. However, when the sliding post 36 is pressed downward, the U-shaped clamp 33 is disengaged from the L-shaped bracket 29, and the L-shaped bracket 29 can be deflected freely.

[0037] During implementation of this embodiment, the entire measuring device can be placed in an instrument box, and an operator can move freely with the instrument box, thereby improving the portability of the entire measuring device.

[0038] The device is unfolded and the measuring device is taken out from the instrument box. First, the vertical beam 11 and the horizontal beam 12 are rotated to a state flush with the support seat 1, and the turntable 5 is rotated. The turntable 5 pushes the extended pin 9 into the pin shaft sleeve 8 through the unfolding rod 6, presses the sliding column 36, and the L-shaped bracket 29 is rotated to the front and back facing state, loosens the sliding column 36, and the U-shaped clamp 33 clamps the L-shaped bracket 29, loosens the winding roller 14, pulls out the plumb bob 13, and the plumb bob 13 relies on its own weight to make the front tensioning belt 23 in a vertical state, buckles the tension spring on the sliding seat 28 and the support seat 1 respectively, and the sliding seat 28 moves toward the direction of the support seat 1, pulls up the second limit slide bar 43, and moves the sliding sleeve 39 to a state of fitting with the sliding seat 28. At this time, the contact rollers on both sides are attached to the left and right sides of the top plate 18, and the entire measuring device completes the unfolding process.

[0039] During measurement and processing, the support base 1 is kept in a straight state. A handle can be provided on the support base 1 for the operator to hold it, and the top plate 18 is pushed from front to back toward the front of the tree. When the top plate 18 contacts the front side of the tree, the top rod 17 stops moving, pushing the support base 1 to continue to move backward, and the top rod 17 and the vertical beam 11 slide relative to each other. The pulling belt 19 is pulled out, the contact roller is disengaged from the top plate 18, and the contact roller falls on the front side of the tree. As the support base 1 continues to move backward, the top rod 17 continues to move forward relative to the vertical beam 11, and the contact roller rolls backward along the side wall of the tree. The contact roller allows the sliding seat 28 to move along the crossbeam 12 through the L-shaped bracket 29. When the contact roller moves to the widest position in the left and right direction of the tree, the distance between the sliding seat 28 and the support base 1 is at its maximum. Position, the slide 39 is at the farthest end, and the sum of the moving distances corresponding to the two slides 39 is the diameter of the tree. Some trees will be dented, so the farthest distances of the slides 39 on both sides may not appear at the same time. Since the size difference is not large, they are approximately regarded as appearing at the same time. If the tree is dented or protruded too much, you can re-measure to avoid these positions. After the contact roller passes the farthest end, the sliding seat 28 moves toward the support seat 1 again under the action of the tension spring. When the contact roller is completely separated from the side wall of the tree, the two contact rollers are in contact. At this time, the sliding distance of the top rod 17 relative to the vertical beam 11 is at its maximum value. At this time, the distance that the pulling belt 19 is pulled out is approximately determined to be the front-to-back diameter of the tree, so that the front-to-back diameter and the left-to-right diameter of the tree are both measured.

[0040] The device is folded, and the measuring device is separated from the tree. The sliding column 36 is pressed downward, and the U-shaped clamp 33 is separated from the L-shaped bracket 29. The L-shaped bracket 29 is rotated to fit the crossbeam 12. The sliding column 36 is released, and the U-shaped clamp 33 moves upward. The side of the U-shaped clamp 33 blocks the L-shaped bracket 29. At this time, the top rod 17 is pushed forward, and the pulling belt 19 is wound around the outside of the measuring roller 21. The winding roller 14 is rotated, and the tension belt 23 is wound around the outside of the winding roller 14. When the plumb bob 13 is stuck in the installation After the frame 16 is above, the winding roller 14 is fixed. At this time, the tensioning belt 23 tightens the top rod 17, and the top rod 17 is locked in the front position. Rotate the turntable 5 in the opposite direction, extend the pin 9 and disengage it from the pin shaft sleeve 8, remove the tension spring, and rotate the crossbeams 12 on both sides and the vertical beam 11 above forward. At this time, the vertical beam 11 and the crossbeam 12 are rotated to a state approximately facing forward and backward, take out the strap, and put the strap on the outside of the vertical beam 11 and the crossbeam 12 at the same time. At this time, the entire measuring device has completed the folding process, and the folded measuring device is placed in the instrument box.

[0041] The present invention is applicable to a tree diameter measuring device. By providing a top rod 17 that moves forward and backward and an L-shaped bracket 29 that moves left and right, the measuring device can simultaneously complete measurement processing for two diameters of a tree in the front-back direction and the left-right direction during a single measurement process. On the one hand, the measurement efficiency is improved, and on the other hand, the two intersecting data can be compared. In addition, the vertical beam 11 and the horizontal beam 12 can be folded, so that the entire measuring device can be folded into a smaller volume, making it convenient for an operator to carry the measuring device when walking in the mountains and forests.

[0042] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

Claims

1. A tree diameter measuring device, characterized in that: It includes a support seat, a side measuring mechanism and a front measuring mechanism; The front measurement mechanism includes a vertical beam arranged in the middle of the support seat, the end of the vertical beam is slidably connected to a push rod, and the end of the vertical beam is provided with a front distance measurement component for detecting the distance the push rod moves relative to the vertical beam; The side measurement mechanism includes a crossbeam provided on both sides of the support base, a sliding base slidably connected to the crossbeam, an L-shaped bracket provided on the side of the sliding base, a contact rod provided at the end of the L-shaped bracket, the contact rod and the top rod being provided at the same height, and a side distance measurement assembly provided on the crossbeam for detecting the distance the sliding base moves relative to the crossbeam; The directions of movement of the sliding seat and the push rod are perpendicular to each other, the contact rod and the push rod are arranged perpendicular to each other, and the axis lines of the contact rods on both sides are arranged collinearly; The cam is provided with a first rotating seat on the side of the support seat, and the first rotating seat is rotatably connected to the end of the cross beam and the vertical beam, and the support seat is provided with an expansion limit assembly that limits the cross beam and the vertical beam to be in the same plane as the support seat, and the expansion limit assembly includes a pin shaft sleeve arranged on the side of the cross beam and the vertical beam close to the support seat, and the support seat is provided with a slide plate on the outside, and the slide plate is slidably connected to an extension pin that cooperates with the pin shaft sleeve, and the middle of the support seat is rotatably connected to the turntable, and the outer side of the turntable is rotatably connected to the expansion rod, and the end of the expansion rod away from the turntable is rotatably connected to the extension pin, and after the cross beam and the vertical beam are rotated to the same plane as the support seat, the ends of the cross beam and the vertical beam are aligned with the side of the support seat The U-shaped clamping head is provided at the end of the sliding post, and a limit plate is provided at the end of the sliding post away from the support plate, and a return spring that drives the support plate to move toward the direction of the L-shaped bracket is provided between the limit plate and the fixed block.

2. A tree diameter measuring device according to claim 1, characterized in that: The end of the push rod is provided with a push plate, and the end of the contact rod is provided with a contact roller.

3. A tree diameter measuring device according to claim 1, characterized in that: A winding roller is provided on the side of the vertical beam close to the support seat, and a tensioning belt is wrapped around the outside of the winding roller. A plumb bob is provided on the free end of the tensioning belt. A mounting bracket is provided on the end of the top rod away from the top plate. The mounting bracket is rotatably connected to a guide wheel that cooperates with the tensioning belt. The tensioning belt passes through the gap between the guide wheel and the mounting bracket. The diameter of the plumb bob is larger than the width of the gap between the guide wheel and the mounting bracket. A tension spring is provided between the sliding seat and the support seat to drive the sliding seat to move toward the support seat.

4. A tree diameter measuring device according to claim 1, characterized in that: The front distance measuring assembly includes a measuring frame arranged at the end of the vertical beam, the measuring frame is rotatably connected to a measuring roller, a pulling belt is wrapped around the outside of the measuring roller, and the end of the pulling belt away from the measuring roller is connected to the top rod.

5. A tree diameter measuring device according to claim 4, characterized in that: A limiting groove is provided on the side of the measuring roller, and multiple limiting grooves are distributed circumferentially relative to the axis of the measuring roller. A first limiting slide rod is slidably connected to the measuring frame, and a first limiting head that cooperates with the limiting groove is provided on the side of the first limiting slide rod close to the measuring roller. A first limiting spring that drives the first limiting slide rod to move toward the measuring roller is provided between the first limiting head and the measuring frame.

6. The tree diameter measuring device according to claim 1, characterized in that: The side distance measuring assembly includes a sliding sleeve slidably connected to the crossbeam, the sliding sleeve is arranged on the side of the sliding seat away from the supporting seat, a rack is arranged on the side of the crossbeam, and an extension frame is arranged on the side of the sliding sleeve. The extension frame is slidably connected to a second limiting slide rod, and a second limiting head cooperating with the rack is arranged at the end of the second limiting slide rod, and a second limiting spring is arranged between the second limiting head and the extension frame to drive the second limiting slide rod to move toward the rack.

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