Tree sawing equipment for forestry and tree sawing method thereof

Abstract

The invention discloses forestry tree sawing equipment and a tree sawing method thereof.The forestry tree sawing equipment comprises a base, a driving mechanism and a steering mechanism, a mounting box is arranged on one side of the upper portion of the base, a rotating motor is vertically and fixedly mounted on one side of the bottom in the mounting box, and a driving shaft is vertically and fixedly mounted at the output end of the rotating motor; the top end of the driving shaft extends out of the mounting box and is welded with a driving gear, the other side of the bottom in the mounting box is vertically and rotatably connected with a rotating shaft, a first belt is connected between the rotating shaft and the driving shaft, and the top end of the rotating shaft extends out of the mounting box and is fixedly provided with a saw blade; clamping pieces are fixedly mounted at the two output ends of the clamping air cylinder, the driving mechanism is used for driving the mounting box to move front, back, left and right, and the steering engine oil is used for driving the clamping air cylinder to steer; according to the invention, automatic tree sawing can be realized, manual tree sawing by workers is not needed, and the tree sawing efficiency is improved; the lodging direction can be controlled after the tree is sawed off, lodging around is avoided, and safety is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of forestry, in particular to a tree sawing device for forestry and a tree sawing method thereof. Background Art

[0002] In the field of forestry planting, in order to prevent weeds from robbing the planted trees of sunlight and nutrients, relevant practitioners often cut down and saw the weeds in the planting area; or when the planted trees grow to the required size, relevant practitioners will also cut down and saw the planted trees.

[0003] However, in the prior art, workers mostly use handheld electric saws to saw trees. Although this method is simple, the electric saw is often heavy, which leads to low efficiency in sawing trees. Moreover, after the tree is cut, it is impossible to determine the direction in which it will fall. The tree may fall everywhere and hit the workers, which is quite dangerous. Therefore, it is necessary to use a forestry tree sawing equipment to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a tree sawing device for forestry and a tree sawing method thereof.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A tree sawing device for forestry, comprising: a base, a mounting box provided on one side above the base, a rotating motor vertically fixedly mounted on one side of the bottom of the mounting box, a driving shaft vertically fixedly mounted on the output end of the rotating motor, the top end of the driving shaft extending out of the mounting box and welded to a driving gear, a rotating shaft vertically rotatably connected to the other side of the bottom of the mounting box, a first belt connected between the rotating shaft and the driving shaft, the top end of the rotating shaft extending out of the mounting box and fixedly mounted with a saw blade, a clamping cylinder horizontally provided above the base, and clamping members fixedly mounted on both output ends of the clamping cylinder; A driving mechanism, the driving mechanism is used to drive the installation box to move forward, backward, left and right; Steering mechanism, the steering oil is used to drive the clamping cylinder to turn.

[0006] As a further technical solution of the present invention, push rods are welded at both ends of one side of the base, a battery is fixedly installed on one side of the bottom of the base, and bottom wheels are fixedly installed at the four corners of the bottom of the base.

[0007] As a further technical solution of the present invention, a hydraulic telescopic rod is vertically fixedly installed on one side of the bottom of the base, a lifting plate is horizontally fixedly installed on the bottom of the telescopic end of the hydraulic telescopic rod, and a plurality of pointed cones are evenly welded on the bottom of the lifting plate.

[0008] As a further technical solution of the present invention, the driving mechanism includes a forward and reverse motor, a first vertical plate and a second vertical plate are vertically welded at the two corners of the top of the base respectively, the forward and reverse motor is horizontally fixedly installed on the inner side of the second vertical plate, the output end of the forward and reverse motor is fixedly installed with a disk, a part of the outer circumference of the disk is evenly welded with a plurality of ratchets, the upper inner side of the second vertical plate is horizontally connected to the second driven shaft, the front end of the second driven shaft is welded with a second driven gear, the upper and lower inner sides of the first vertical plate are horizontally connected to the screw rod and the first driven shaft respectively, the front end of the first driven gear is welded with the first driven gear, the first driven gear and the second driven gear are meshed with a plurality of ratchets in sequence, and the outer side of the first driven shaft is sleeved with a sleeve shaft. The sleeve shaft and the first driven shaft are connected by a spline, and a rotating plate is welded on the outside of the sleeve shaft, and a slide is slidably connected to the top side of the base, and an L-shaped rod is horizontally penetrated and slidably connected to the slide, and the top of the L-shaped rod is welded to the bottom of the mounting box, and a triangular block is horizontally welded to the other end of the L-shaped rod, and a spring is sleeved on the outside of the L-shaped rod, and the two ends of the spring are respectively welded to the side of the slide and the triangular block, and the end of the rotating plate abuts the inclined surface of the triangular block, and an L-shaped movable plate is sleeved on the outside of the screw rod, and the L-shaped movable plate and the screw rod are connected by threads, the sleeve shaft penetrates the L-shaped movable plate and is rotatably connected to the L-shaped movable plate, and the other end of the L-shaped movable plate is welded to the side of the slide, and a second belt is connected between the screw rod and the second driven shaft.

[0009] As a further technical solution of the present invention, the steering mechanism includes a vertical shaft and a steering shaft, the vertical shaft is vertically connected to the top side of the base, a third driven gear is welded on the vertical shaft, and the third driven gear can be engaged with the driving gear, the top of the vertical shaft is welded with a driving bevel gear, an L-shaped support plate is welded to the top side of the base, one side of the L-shaped support plate is horizontally connected to the horizontal shaft, the front end of the horizontal shaft is welded with a driven bevel gear, the driving bevel gear and the driven bevel gear are engaged, the steering shaft is horizontally fixedly installed at the center of the side of the clamping cylinder, the other end of the steering shaft is rotatably connected to the side of the L-shaped support plate, and a third belt is connected between the steering shaft and the horizontal shaft.

[0010] A method for sawing trees for forestry, comprising the following steps: S1: Use the push rod and bottom wheels to move the device to the tree to be felled, so that the two clamping parts are on both sides of the tree. At this time, the saw blade is aimed at one side of the tree. Activate the hydraulic telescopic rod to drive the lifting plate down until multiple spikes are inserted into the ground to fix the position of the device. Activate the clamping cylinder to drive the two clamping parts to move towards each other until the tree is clamped. S2: Start the rotary motor to drive the saw blade to rotate through the driving shaft, and at the same time start the forward and reverse motors to drive the turntable to rotate. The multiple ratchets on the turntable first engage with the first driven gear to drive the first driven gear to rotate one circle, and the first driven gear drives the first driven shaft to rotate one circle; S3: Since the sleeve shaft and the first driven shaft are connected by a spline, the first driven shaft drives the sleeve shaft to rotate one circle, and the sleeve shaft drives the rotating plate to rotate one circle. The end of the rotating plate squeezes the inclined surface of the triangular block to push the triangular block forward. The triangular block drives the saw blade on the mounting box to move forward through the L-shaped rod to saw the tree. When the triangular block moves forward, it squeezes the spring. When the rotating plate rotates to no longer abut the triangular block, the triangular block returns to its original position under the rebound force of the spring, driving the saw blade back to its original position. S4: The multiple ratchets on the rotating disk mesh with the second driven gear, driving the second driven gear to rotate one circle. The second driven gear drives the second driven shaft to rotate. The second driven shaft drives the lead screw to rotate via the second belt, causing the L-shaped movable plate to move forward on the lead screw. The L-shaped movable plate drives the sleeve shaft and the slide forward together. The slide drives the saw blade on the mounting box to move forward to the other side of the tree. S5: Repeat S2-3 to complete sawing on the other side of the tree; S6: Repeat S4 again, so that the second driven gear is engaged and drives the second driven gear to rotate a certain angle, thereby causing the L-shaped moving plate to move forward a certain distance on the screw rod until the driving gear on the installation box moves forward to engage with the third driven gear, and at this time, the forward and reverse motors are turned off; S7: At the same time, the driving shaft drives the first driven shaft to rotate through the first belt, the first driven shaft drives the vertical shaft to rotate through the driving gear and the third driven gear, the vertical shaft drives the horizontal shaft to rotate through the driving bevel gear and the driven bevel gear, the horizontal shaft drives the steering shaft to rotate through the third belt, and the steering shaft drives the tree fixed in front of the clamping cylinder to rotate a certain angle until it falls to the ground, completing the tree sawing and falling work.

[0011] The beneficial effects of the present invention are: automatic tree sawing can be achieved without the need for workers to manually saw the trees, thereby improving the efficiency of tree sawing; and after the trees are cut, their falling direction can be controlled to avoid falling everywhere, thereby improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic structural diagram of a tree sawing device for forestry proposed by the present invention; Figure 2 This is a side structural diagram of a tree sawing device for forestry proposed by the present invention; Figure 3 This is a rear structural schematic diagram of a tree sawing device for forestry proposed by the present invention; Figure 4 This is a schematic diagram of the structure of a tree sawing equipment for forestry use proposed by the present invention from a bottom-up perspective; Figure 5 This is a partial cross-sectional structural diagram of a tree sawing device for forestry proposed by the present invention; Figure 6This is a schematic diagram of the structure of a tree sawing device for forestry proposed by the present invention, showing a completed state of sawing a tree; Figure 7 This is a schematic side view of the structure of a tree sawing device for forestry proposed by the present invention in a state where the tree is cut; Figure 8 This is a schematic diagram of the partial structure of a tree sawing equipment for forestry proposed by the present invention.

[0013] Figure: 1, steering shaft; 2, clamping cylinder; 3, clamping member; 4, slide plate; 5, base; 6, third driven gear; 7, vertical shaft; 8, L-shaped support plate; 9, bottom wheel; 10, first vertical plate; 11, driving bevel gear; 12, driven bevel gear; 13, hand push rod; 14, horizontal shaft; 15, screw; 16, third belt; 17, first driven shaft; 18, L-shaped movable plate; 19, second belt; 20, second driven shaft; 21, second vertical plate Plate; 22. Triangular block; 23. Mounting box; 24. Spring; 25. L-shaped rod; 26. Saw blade; 27. Second driven gear; 28. Disc; 29. Forward and reverse motor; 30. Ratchet; 31. First driven gear; 32. Sleeve shaft; 33. Battery; 34. Cone; 35. Lifting plate; 36. Hydraulic telescopic rod; 37. Driving shaft; 38. Driving gear; 39. First belt; 40. Rotating shaft; 41. Rotating motor; 42. Rotating plate. DETAILED DESCRIPTION

[0014] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0015] Please see the attached Figure 1 -Attached Figure 8 A tree sawing device for forestry includes: a base 5, a mounting box 23 is provided on one side above the base 5, a rotating motor 41 is vertically fixedly installed on one side of the bottom of the mounting box 23, a driving shaft 37 is vertically fixedly installed on the output end of the rotating motor 41, the top end of the driving shaft 37 extends out of the mounting box 23 and is welded with a driving gear 38, a rotating shaft 40 is vertically rotatably connected to the other side of the bottom of the mounting box 23, a first belt 39 is connected between the rotating shaft 40 and the driving shaft 37, the top end of the rotating shaft 40 extends out of the mounting box 23 and is fixedly installed with a saw blade 26, a clamping cylinder 2 is horizontally provided above the base 5, and clamping members 3 are fixedly installed on both output ends of the clamping cylinder 2; A driving mechanism, which is used to drive the installation box 23 to move forward, backward, left and right; Steering mechanism, steering oil is used to drive the clamping cylinder 2 to steer.

[0016] Please see the attached Figure 1 and 4In a preferred embodiment, push rods 13 are welded at both ends of one side of the base 5, a battery 33 is fixedly installed on one side of the bottom of the base 5, and bottom wheels 9 are fixedly installed at the four corners of the bottom of the base 5.

[0017] The battery 33 provides power for all electrical devices.

[0018] Please see the attached Figure 4 In a preferred embodiment, a hydraulic telescopic rod 36 is vertically fixedly installed on one side of the bottom of the base 5, and a lifting plate 35 is horizontally fixedly installed on the bottom of the telescopic end of the hydraulic telescopic rod 36, and a plurality of pointed cones 34 are evenly welded on the bottom of the lifting plate 35.

[0019] A plurality of pointed cones 34 are inserted into the ground to increase the grip of the entire device and prevent the device from deflecting. The device fixed to the ground and the clamping member holding the tree work together to support the tree during the felling process.

[0020] Please see the attached Figure 1-8 In a preferred embodiment, the driving mechanism includes a forward and reverse motor 29, and the first vertical plate 10 and the second vertical plate 21 are vertically welded to the two corners of the top of the base 5 respectively. The forward and reverse motor 29 is horizontally fixedly installed on the inner side of the second vertical plate 21, and a disc 28 is fixedly installed on the output end of the forward and reverse motor 29. A plurality of ratchet teeth 30 are evenly welded on part of the outer periphery of the disc 28. A second driven shaft 20 is horizontally connected to the upper inner side of the second vertical plate 21, and a second driven gear 27 is welded to the front end of the second driven shaft 20.

[0021] The second vertical plate 21 provides support for the forward and reverse motor 29 and the second driven shaft 20 .

[0022] Please see the attached Figure 1-8 In a preferred embodiment, the upper and lower parts of the inner side of the first vertical plate 10 are horizontally connected with a screw rod 15 and a first driven shaft 17, and a first driven gear 31 is welded to the front end of the first driven shaft 17. The first driven gear 31 and the second driven gear 27 are engaged with a plurality of ratchets 30 in sequence. A sleeve shaft 32 is sleeved on the outside of the first driven shaft 17. The sleeve shaft 32 and the first driven shaft 17 are connected by a spline, and a rotating plate 42 is welded to the outside of the sleeve shaft 32.

[0023] The first vertical plate 10 provides support for the screw rod 15 and the first driven shaft 17; the sleeve shaft 32 can slide on the first driven shaft 17, and the first driven shaft 17 drives the sleeve shaft 32 to rotate.

[0024] Please see the attached Figure 1-8In a preferred embodiment, a slide plate 4 is slidably connected to one side of the top of the base 5, and an L-shaped rod 25 is horizontally passed through and slidably connected to the slide plate 4. The top end of the L-shaped rod 25 is welded to the bottom of the mounting box 23, and the other end of the L-shaped rod 25 is horizontally welded to a triangular block 22. A spring 24 is sleeved on the outside of the L-shaped rod 25, and the two ends of the spring 24 are respectively welded to the side of the slide plate 4 and the triangular block 22, and the end of the rotating plate 42 abuts against the inclined surface of the triangular block 22.

[0025] Please see the attached Figure 1-8 In a preferred embodiment, an L-shaped movable plate 18 is sleeved on the outside of the screw rod 15, the L-shaped movable plate 18 and the screw rod 15 are connected by threads, the sleeve shaft 32 passes through the L-shaped movable plate 18 and is rotatably connected to the L-shaped movable plate 18, the other end of the L-shaped movable plate 18 is welded to the side of the slide 4, and a second belt 19 is connected between the screw rod 15 and the second driven shaft 20.

[0026] Please see the attached Figure 1-7 In a preferred embodiment, the steering mechanism includes a vertical shaft 7 and a steering shaft 1. The vertical shaft 7 is vertically rotatably connected to one side of the top of the base 5. A third driven gear 6 is welded to the vertical shaft 7. The third driven gear 6 can engage with the driving gear 38. A driving bevel gear 11 is welded to the top of the vertical shaft 7, and an L-shaped support plate 8 is welded to one side of the top of the base 5.

[0027] Please see the attached Figure 1-7 In a preferred embodiment, one side of the L-shaped support plate 8 is horizontally rotatably connected to a horizontal shaft 14, a driven bevel gear 12 is welded to the front end of the horizontal shaft 14, the driving bevel gear 11 and the driven bevel gear 12 are meshed, the steering shaft 1 is horizontally fixedly installed at the center of the side of the clamping cylinder 2, and the other end of the steering shaft 1 is rotatably connected to the side of the L-shaped support plate 8, and a third belt 16 is connected between the steering shaft 1 and the horizontal shaft 14.

[0028] The L-shaped support plate 8 provides support for the transverse shaft 14 and the steering shaft 1 .

[0029] A method for sawing trees for forestry, comprising the following steps: S1: Use the push rod 13 and the bottom wheel 9 to move the device to the tree to be felled, so that the two clamping parts 3 are located on both sides of the tree. At this time, the saw blade 26 is aimed at one side of the tree. The hydraulic telescopic rod 36 is activated to drive the lifting plate 35 to descend until the multiple pointed cones 34 are inserted into the ground to fix the position of the device. The clamping cylinder 2 is activated to drive the two clamping parts 3 to move toward each other until the tree is clamped. S2: Start the rotary motor 41 to drive the saw blade 26 to rotate via the driving shaft 37, and simultaneously start the forward and reverse motor 29 to drive the turntable to rotate. The multiple ratchet teeth 30 on the turntable first engage with the first driven gear 31 to drive the first driven gear 31 to rotate one circle, and the first driven gear 31 drives the first driven shaft 17 to rotate one circle. S3: Since the sleeve shaft 32 and the first driven shaft 17 are connected by a spline, the first driven shaft 17 drives the sleeve shaft 32 to rotate one circle, and the sleeve shaft 32 drives the rotating plate 42 to rotate one circle. The end of the rotating plate 42 squeezes the inclined surface of the triangular block 22 to push the triangular block 22 forward. The triangular block 22 drives the saw blade 26 on the mounting box 23 to move forward through the L-shaped rod 25 to saw the tree. When the triangular block 22 moves forward, it squeezes the spring 24. When the rotating plate 42 rotates to no longer abut the triangular block 22, the triangular block 22 returns to its original position under the rebound force of the spring 24, thereby driving the saw blade 26 back to its original position. S4: The multiple ratchet teeth 30 on the rotating disk mesh with the second driven gear 27, driving the second driven gear 27 to rotate one circle. The second driven gear 27 drives the second driven shaft 20 to rotate. The second driven shaft 20 drives the screw rod 15 to rotate via the second belt 19, causing the L-shaped movable plate 18 to move forward on the screw rod 15. The L-shaped movable plate 18 drives the sleeve shaft 32 and the slide plate 4 to move forward together. The slide plate 4 drives the saw blade 26 on the mounting box 23 to move forward to the other side of the tree. S5: Repeat S2-3 to complete sawing on the other side of the tree; S6: Repeat S4 to make the second driven gear 27 engage and drive the second driven gear 27 to rotate a certain angle, so that the L-shaped movable plate 18 moves forward a certain distance on the screw rod 15 until the driving gear 38 on the mounting box 23 moves forward to engage with the third driven gear 6, and then the forward and reverse motor 29 is turned off; It can realize automatic tree sawing, eliminating the need for workers to manually saw trees, thus improving tree sawing efficiency.

[0030] S7: At the same time, the driving shaft 37 drives the first driven shaft 17 to rotate through the first belt 39, the first driven shaft 17 drives the vertical shaft 7 to rotate through the driving gear 38 and the third driven gear 6, the vertical shaft 7 drives the horizontal shaft 14 to rotate through the driving bevel gear 11 and the driven bevel gear 12, the horizontal shaft 14 drives the steering shaft 1 to rotate through the third belt 16, and the steering shaft 1 drives the tree fixed in front of the clamping cylinder 2 to rotate a certain angle until it falls to the ground, completing the sawing and falling of the tree.

[0031] After the trees are cut, their falling direction can be controlled to avoid them falling everywhere, thus improving safety.

[0032] It should be understood by those skilled in the art that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Within the scope of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0033] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A tree sawing equipment for forestry, characterized in that: include: A base (5), wherein a mounting box (23) is provided on one side above the base (5), a rotating motor (41) is vertically fixedly installed on one side of the bottom of the mounting box (23), a driving shaft (37) is vertically fixedly installed on the output end of the rotating motor (41), the top end of the driving shaft (37) extends out of the mounting box (23) and is welded with a driving gear (38), a rotating shaft (40) is vertically rotatably connected on the other side of the bottom of the mounting box (23), a first belt (39) is connected between the rotating shaft (40) and the driving shaft (37), the top end of the rotating shaft (40) extends out of the mounting box (23) and is fixedly installed with a saw blade (26), a clamping cylinder (2) is horizontally provided above the base (5), and clamping members (3) are fixedly installed on both output ends of the clamping cylinder (2); A driving mechanism, the driving mechanism being used to drive the installation box (23) to move forward, backward, left and right; Steering mechanism, the steering oil is used to drive the clamping cylinder (2) to steer.

2. A tree sawing equipment for forestry according to claim 1, characterized in that: Hand push rods (13) are welded to both ends of one side of the base (5), a battery (33) is fixedly mounted on one side of the bottom of the base (5), and bottom wheels (9) are fixedly mounted on the four corners of the bottom of the base (5).

3. The tree sawing equipment for forestry according to claim 1, characterized in that: A hydraulic telescopic rod (36) is vertically fixedly installed on one side of the bottom of the base (5), and a lifting plate (35) is horizontally fixedly installed on the bottom of the telescopic end of the hydraulic telescopic rod (36), and a plurality of pointed cones (34) are evenly welded on the bottom of the lifting plate (35).

4. The tree sawing equipment for forestry according to claim 1, characterized in that: The driving mechanism includes a forward and reverse motor (29), a first vertical plate (10) and a second vertical plate (21) are vertically welded to the two corners of the top of the base (5), the forward and reverse motor (29) is horizontally fixedly installed on the inner side of the second vertical plate (21), a disk (28) is fixedly installed on the output end of the forward and reverse motor (29), a plurality of ratchet teeth (30) are uniformly welded on part of the outer periphery of the disk (28), a second driven shaft (20) is horizontally rotatably connected to the upper inner side of the second vertical plate (21), and a second driven gear (27) is welded to the front end of the second driven shaft (20).

5. The tree sawing equipment for forestry according to claim 4, characterized in that: The upper and lower parts of the inner side of the first vertical plate (10) are respectively connected to the screw rod (15) and the first driven shaft (17) in a horizontal rotation manner. The front end of the first driven shaft (17) is welded with a first driven gear (31). The first driven gear (31) and the second driven gear (27) are meshed with a plurality of ratchet teeth (30) in sequence. The outer side of the first driven shaft (17) is covered with a sleeve shaft (32). The sleeve shaft (32) and the first driven shaft (17) are connected by a spline. The outer side of the sleeve shaft (32) is welded with a rotating plate (42).

6. The tree sawing equipment for forestry according to claim 5, characterized in that: A slide plate (4) is slidably connected to one side of the top of the base (5), an L-shaped rod (25) is horizontally passed through and slidably connected to the slide plate (4), the top end of the L-shaped rod (25) is welded to the bottom of the installation box (23), the other end of the L-shaped rod (25) is horizontally welded to a triangular block (22), a spring (24) is sleeved on the outside of the L-shaped rod (25), the two ends of the spring (24) are respectively welded to the side of the slide plate (4) and the triangular block (22), and the end of the rotating plate (42) is in contact with the inclined surface of the triangular block (22).

7. The tree sawing equipment for forestry according to claim 6, characterized in that: An L-shaped movable plate (18) is sleeved on the outer side of the screw rod (15), and the L-shaped movable plate (18) and the screw rod (15) are connected by threads. The sleeve shaft (32) passes through the L-shaped movable plate (18) and is rotatably connected to the L-shaped movable plate (18). The other end of the L-shaped movable plate (18) is welded to the side of the slide plate (4). A second belt (19) is connected between the screw rod (15) and the second driven shaft (20).

8. The tree sawing equipment for forestry use according to claim 1, characterized in that: The steering mechanism comprises a vertical shaft (7) and a steering shaft (1); the vertical shaft (7) is vertically rotatably connected to one side of the top of the base (5); a third driven gear (6) is welded to the vertical shaft (7); the third driven gear (6) can mesh with the driving gear (38); a driving bevel gear (11) is welded to the top of the vertical shaft (7); and an L-shaped support plate (8) is welded to one side of the top of the base (5).

9. The tree sawing equipment for forestry use according to claim 8, characterized in that: One side of the L-shaped support plate (8) is horizontally rotatably connected to a transverse shaft (14), a driven bevel gear (12) is welded to the front end of the transverse shaft (14), the driving bevel gear (11) and the driven bevel gear (12) are meshed, the steering shaft (1) is horizontally fixedly installed at the center of the side of the clamping cylinder (2), the other end of the steering shaft (1) is rotatably connected to the side of the L-shaped support plate (8), and a third belt (16) is connected between the steering shaft (1) and the transverse shaft (14).

10. A tree sawing method using a tree sawing device for forestry use according to claims 1-9, characterized in that: The following steps are involved: S1: Use the push rod (13) and the bottom wheel (9) to move the device to the front of the tree to be felled, so that the two clamping parts (3) are located on both sides of the tree. At this time, the saw blade (26) is aimed at one side of the tree. The hydraulic telescopic rod (36) is started to drive the lifting plate (35) to descend until the multiple pointed cones (34) are inserted into the ground to fix the position of the device. The clamping cylinder (2) is started to drive the two clamping parts (3) to move toward each other until the tree is clamped. S2: Start the rotary motor (41) to drive the saw blade (26) to rotate via the driving shaft (37), and simultaneously start the forward and reverse motor (29) to drive the turntable to rotate. The plurality of ratchets (30) on the turntable first engage with the first driven gear (31) to drive the first driven gear (31) to rotate one circle, and the first driven gear (31) drives the first driven shaft (17) to rotate one circle; S3: Since the sleeve shaft (32) and the first driven shaft (17) are connected by a spline, the first driven shaft (17) drives the sleeve shaft (32) to rotate one circle, and the sleeve shaft (32) drives the rotating plate (42) to rotate one circle. The end of the rotating plate (42) squeezes the inclined surface of the triangular block (22) to push the triangular block (22) forward. The triangular block (22) drives the saw blade (26) on the mounting box (23) to move forward through the L-shaped rod (25) to saw the tree. When the triangular block (22) moves forward, it squeezes the spring (24). When the rotating plate (42) rotates to no longer abut the triangular block (22), the triangular block (22) returns to its original position under the rebound force of the spring (24), and drives the saw blade (26) back to its original position. S4: The plurality of ratchet teeth (30) on the rotating disk are meshed with the second driven gear (27) to drive the second driven gear (27) to rotate one circle, the second driven gear (27) drives the second driven shaft (20) to rotate, the second driven shaft (20) drives the screw rod (15) to rotate through the second belt (19), so that the L-shaped movable plate (18) moves forward on the screw rod (15), the L-shaped movable plate (18) drives the sleeve shaft (32) and the slide plate (4) to move forward together, and the slide plate (4) drives the saw blade (26) on the mounting box (23) to move forward to the other side of the tree; S5: Repeat S2-3 to complete sawing on the other side of the tree; S6: Repeat S4 again, so that the second driven gear (27) is engaged and drives the second driven gear (27) to rotate a certain angle, thereby causing the L-shaped moving plate (18) to move forward a certain distance on the screw rod (15) until the driving gear (38) on the mounting box (23) moves forward to engage with the third driven gear (6), and at this time, the forward and reverse motor (29) is turned off; S7: At the same time, the driving shaft (37) drives the first driven shaft (17) to rotate through the first belt (39), the first driven shaft (17) drives the vertical shaft (7) to rotate through the driving gear (38) and the third driven gear (6), the vertical shaft (7) drives the horizontal shaft (14) to rotate through the driving bevel gear (11) and the driven bevel gear (12), the horizontal shaft (14) drives the steering shaft (1) to rotate through the third belt (16), and the steering shaft (1) drives the tree fixed in front of the clamping cylinder (2) to rotate a certain angle until it falls to the ground, completing the sawing and falling of the tree.

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