Electric lumbering wedge

Abstract

The invention discloses an electric felling wedge. The felling wedge comprises a main felling wedge body and a sub felling wedge body, a notch used for containing the sub felling wedge body is formed in the front side of the main felling wedge body, and the main felling wedge body is provided with a driving mechanism used for driving the sub felling wedge body to forwards stretch out of / retract into the notch. The automatic felling device can automatically move towards the inner side of a trunk crack during felling, a felling worker does not need to conduct close operation in the whole felling process, potential safety hazards are eliminated, operation is easy, and time and labor are saved.

Description

Technical Field

[0001] The invention relates to the technical field of felling tools, in particular to an electric felling wedge. Background Art

[0002] At present, electric saws are the most commonly used logging tools in logging operations. However, it is dangerous for loggers to operate electric saws at close range to fell trees. In addition, the direction in which trees fall cannot be controlled when using electric saws to fell trees, which poses a safety hazard of injuring passers-by and surrounding houses and buildings. In order to solve these problems, electric felling wedges were invented. Electric felling wedges can control the direction in which trees fall, and loggers do not need to cut trees at close range, which improves logging safety.

[0003] The existing electric felling wedge is composed of a wedge with a non-return structure on the top surface and a propulsion device. When in use, the lumberjack first uses an electric saw to saw a crack on the tree trunk, inserts the wedge into the crack, and starts the propulsion device. The propulsion device pushes the wedge into the crack to expand the crack. When the wedge enters a certain depth, the tree will fall in the set direction, and the felling is completed. However, when using the existing electric felling wedge to fell large trees, due to the large trunk diameter of the large tree, the propulsion device still cannot fell the large tree when pushing the wedge into the limit position in the trunk crack. At this time, the lumberjack needs to insert an ordinary wedge into the trunk crack to support it, reset the electric felling wedge and push it into the innermost side of the trunk crack, start the electric felling wedge to work again, and so on. The cycle continues until the large tree is felled. Since the lumberjack needs to operate close to the body, there are safety hazards, and the operation is cumbersome, time-consuming and laborious. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an electric felling wedge, which can automatically move to the inside of the trunk crack during felling. The entire felling process does not require close operation by lumberjacks, eliminating safety hazards, is simple to operate, and saves time and effort.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions:

[0006] The electric felling wedge of the present invention comprises a main felling wedge and a sub-falling wedge. The front side of the main felling wedge is provided with a notch for accommodating the sub-falling wedge. The main felling wedge is provided with a driving mechanism for driving the sub-falling wedge to extend forward / retract into the notch.

[0007] In this solution, both the main felling wedge and the sub-falling wedge are provided with a non-return structure, so the main felling wedge and the sub-falling wedge can only move forward and cannot move backward when they are in the crack of the tree trunk. When in use, the lumberjack first uses an electric saw to saw a crack in the tree trunk, inserts the main felling wedge into the crack, starts the driving mechanism, and the driving mechanism drives the sub-felling wedge to extend forward through the gap to expand the crack. When the sub-felling wedge is extended forward to the limit position, if the tree has not been felled yet, the driving mechanism drives the sub-felling wedge to retract into the gap. Since there is a check structure on the sub-felling wedge, the sub-felling wedge is stuck by the tree and cannot move backward through the check structure. Then the main felling wedge moves forward, causing the sub-felling wedge to retract into the gap, thereby completing the overall forward movement of the electric felling wedge. Afterwards, the driving mechanism drives the sub-felling wedge to extend forward through the gap to further expand the crack. If the tree has not been felled yet, the driving mechanism drives the sub-felling wedge to retract into the gap, i.e. the main felling wedge moves forward, and the cycle continues until the tree is felled.

[0008] During the entire felling process, the electric felling wedge automatically completes the entire felling process. It is easy to operate, saves time and effort, and does not require workers to operate close to the tree during the entire process, eliminating safety hazards. It can be used for trees of any diameter and has strong applicability.

[0009] Preferably, the main felling wedge comprises a main wedge and a connecting block, the connecting block is arranged on the rear side of the main wedge, the notch is located on the front side of the main wedge, the connecting block is provided with a cavity with a front opening, the driving mechanism comprises a screw rod, a screw rod nut and a driving module, the rear side of the main wedge is provided with a through hole, the notch is connected with the cavity through the through hole, the screw rod nut is arranged in the through hole and is fixedly connected to the main wedge, the screw rod nut is sleeved on the screw rod, the front end of the screw rod is rotatably connected to the rear end of the sub-felling wedge, the rear end of the screw rod extends into the cavity and is connected to the driving module, the driving module is used to drive the screw rod to rotate, a guide rail arranged along the front-back direction is provided in the cavity, a slider which can slide along the guide rail is provided on the guide rail, and the driving module is fixed on the slider.

[0010] When the drive module drives the screw to rotate in the forward direction, the screw nut is fixed, the screw moves forward, pushing the sub-woodcutting wedge forward to extend out of the gap, and the drive module is pulled forward by the screw, driving the slider to move forward along the guide rail. When the drive module drives the screw to rotate in the reverse direction, the screw moves backward, pulling the sub-woodcutting wedge back into the gap, and the drive module is pushed backward by the screw, driving the slider to move backward along the guide rail.

[0011] Preferably, a check assembly is symmetrically provided on the top surface of the main wedge, and the check assembly includes a plurality of first check blocks. A receiving groove for accommodating the first check block is provided on the top surface of the main wedge corresponding to the position of the first check block. The bottom of the first check block is located in the receiving groove and is rotatably connected to the main wedge through a rotating shaft. An elastic member is provided in the receiving groove, and the elastic member is used to drive the first check block to rotate to an upward tilted state from front to back, so that the top of the first check block extends upward out of the receiving groove.

[0012] A plurality of first check blocks are arranged in a straight line from front to back. When no external force is applied, the first check blocks rotate to an upward tilted state from front to back under the action of the elastic member, and the top of the first check block extends upward out of the receiving groove. When the main wedge of the main felling wedge is inserted into the crack of the tree trunk, the first check block rotates toward the receiving groove under the pressure of the tree trunk, so that the main wedge can be smoothly inserted into the crack of the tree trunk. If the main wedge moves forward, the first check block will not generate resistance to the main wedge. If the main wedge moves backward, the first check block will rotate toward the upper side of the receiving groove under the action of the elastic member, get stuck with the tree trunk, and prevent the main wedge from moving backward.

[0013] Preferably, the longitudinal section of the first check block is teardrop-shaped, the large end of the first check block is rotatably connected to the main wedge via a rotating shaft, and the small end of the first check block extends upward out of the accommodating groove under the action of the elastic member.

[0014] The elastic member is a spring sheet, which is S-shaped. The large end of the first check block is located at the front side of the receiving groove, a spring sheet fixing groove is provided at the front side of the receiving groove, the front part of the spring sheet is located in the spring sheet fixing groove, and the rear part of the spring sheet wraps the large end of the first check block from below.

[0015] Preferably, a claw is provided at the top of the small end portion. The middle of the top of the small end portion is inwardly recessed to form two left-right symmetrical pointed blocks, which constitute the claw.

[0016] Preferably, the top surface of the main wedge and the top surface of the sub-felling wedge are located in the same plane.

[0017] Preferably, the top surface of the connecting block consists of an inclined surface located at the front side and a horizontal surface located at the rear side, and the inclined surface and the top surface of the main wedge are located in the same plane.

[0018] Preferably, the drive module includes a drive motor, a transmission mechanism, an impact mechanism and an output shaft, the rear end of the screw rod is coaxially connected to the output shaft, the impact mechanism is arranged between the output shaft and the transmission mechanism and connects the output shaft and the transmission mechanism, the impact mechanism is used to apply an impact force to the output shaft, the transmission mechanism is connected to the drive motor, and the transmission mechanism is used to decelerate the rotation of the drive motor and transmit it to the output shaft.

[0019] The driving motor decelerates through the transmission mechanism and then drives the impact mechanism to apply a rotational impact force to the screw rod, thereby driving the screw rod to rotate.

[0020] Preferably, the receiving groove passes through the main wedge in the vertical direction. During the logging process, wood chips and other debris are easily dropped into the receiving groove, and the receiving groove passes through the main wedge, so that the debris in the receiving groove can be discharged from the bottom.

[0021] Preferably, the sub-felling wedge includes a sub-wedge body, the sub-wedge body is provided with a guide groove penetrating the sub-wedge body in the left-right direction, the guide groove is arranged along the front-back direction, a guide column passing through the guide groove is provided in the notch, and the guide column can slide along the guide groove.

[0022] Preferably, a plurality of second check blocks are evenly distributed on the top surface of the sub-wedge, the second check blocks are triangular in shape, the left and right side walls of the second check blocks are inclined inward from front to back, the top surface of the second check blocks is inclined upward from front to back, and the front end of the top surface of the second check blocks is connected to the top surface of the sub-wedge.

[0023] When the sub-wedge is located in the crack of the tree trunk, if the sub-wedge moves forward, the second check block will not generate resistance to the sub-wedge; if the sub-wedge moves backward, the second check block is stuck with the tree trunk, preventing the main wedge from moving backward.

[0024] Preferably, the main felling wedge is provided with a controller and a wireless communication module, and the controller is electrically connected to the driving mechanism and the wireless communication module respectively. The electric felling wedge can be operated by remote control devices such as mobile phones and remote controllers by wireless communication with the wireless communication module.

[0025] Preferably, handles are symmetrically provided on left and right sides of the connecting block.

[0026] Preferably, the handle is provided with a strap buckle.

[0027] Preferably, a battery is provided on the rear side of the connecting block, the battery is detachably connected to the connecting block, and the battery is used to power the electric felling wedge.

[0028] The beneficial effects of the present invention are: it can automatically move to the inside of the crack of the tree trunk during felling, and the whole felling process does not require close operation by lumberjacks, thus eliminating potential safety hazards, and the operation is simple, time-saving and labor-saving, and the present invention is suitable for trees of any diameter and has strong applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the structure of an electric felling wedge;

[0030] Figure 2 It is an exploded view of an electric felling wedge;

[0031] Figure 3This is a schematic diagram of the internal structure of an electric felling wedge;

[0032] Figure 4 It is a schematic diagram of the structure of the main felling wedge;

[0033] Figure 5 is a schematic diagram of the first check block being installed on the receiving groove;

[0034] Figure 6 is a structural schematic diagram of the first check block;

[0035] Figure 7 It is a schematic diagram of the structure of the sub-logging wedge;

[0036] Figure 8 is a schematic diagram of the structure of the second check block;

[0037] Fig. 9 It is a schematic diagram of the structure of the drive module;

[0038] Fig.10 It is a schematic diagram of the internal structure of the impact mechanism;

[0039] Fig.11 It is a schematic diagram of the structure of the transmission shaft;

[0040] Fig.12 It is a schematic diagram of the results of the active impact cylinder;

[0041] Fig.13 It is a cross-sectional view of the impact mechanism.

[0042] In the figure: 1, main felling wedge, 2, sub-falling wedge, 3, notch, 4, main wedge, 5, connecting block, 6, cavity, 7, screw, 8, screw nut, 9, drive motor, 10, impact mechanism, 11, guide rail, 12, slider, 13, first check block, 14, receiving groove, 15, elastic member, 16, large end, 17, small end, 18, claw, 19, inclined plane, 20, horizontal plane, 21, sub-wedge, 22, guide groove, 23, guide column, 24, second check block, 25, controller, 26, battery , 27. handle, 28. strap buckle, 29. metal shell, 30. metal cover, 31. chip removal port, 32. through hole, 33. limit notch, 34. first opening, 35. strip hole, 36. second opening, 37. output shaft, 38. transmission mechanism, 39. active impact cylinder, 40. passive impact cylinder, 41. transmission shaft, 42. active impact block, 43. passive impact block, 44. V-shaped ball track, 45. rolling ball, 46. receiving groove, 47. push ring, 48. groove, 49. stopper, 50. reset spring. DETAILED DESCRIPTION

[0043] The technical solution of the present invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0044] Embodiment: An electric felling wedge of this embodiment, such as Figures 1 to 13 As shown, it comprises a main felling wedge 1 and a sub-felling wedge 2. The front side of the main felling wedge 1 is provided with a notch 3 for accommodating the sub-felling wedge 2. The main felling wedge 1 is provided with a driving mechanism for driving the sub-felling wedge 2 to extend forward / retract into the notch.

[0045] The main felling wedge 1 includes a main wedge 4 and a connecting block 5. The connecting block 5 is arranged at the rear side of the main wedge 4. The notch 3 is located at the front side of the main wedge 4. The connecting block 5 is provided with a cavity 6 with a front opening. The driving mechanism includes a screw rod 7, a screw rod nut 8 and a driving module. A through hole 32 is provided at the rear side of the main wedge 4. The front end of the through hole 32 is connected with the notch 3, and the rear end of the through hole 32 is connected with the cavity 6. The notch 3 is connected with the cavity 6 through the through hole 32. The screw rod nut 8 is arranged in the through hole 32 and is fixedly connected with the main wedge 4. The screw rod 7 passes through the through hole 32. The screw rod nut 8 is sleeved on the screw rod 7. The front end of the screw rod 7 is rotatably connected with the rear end of the sub-falling wedge 2 through a plane bearing. The rear end of the screw rod 7 extends into the cavity 6 and is connected with the driving module. A guide rail 11 is arranged in the front-back direction in the cavity 6. A slider 12 that can slide along the guide rail 11 is provided on the guide rail 11. The driving module is fixed on the slider 12. The guide rail 11 includes tracks symmetrically arranged on the left and right inner walls of the cavity 6.

[0046] When the drive module drives the screw to rotate in the forward direction, the screw nut is fixed, the screw moves forward, pushing the sub-woodcutting wedge forward to extend out of the gap, and the drive module is pulled forward by the screw, driving the slider to move forward along the guide rail. When the drive module drives the screw to rotate in the reverse direction, the screw moves backward, pulling the sub-woodcutting wedge back into the gap, and the drive module is pushed backward by the screw, driving the slider to move backward along the guide rail.

[0047] The driving module includes a driving motor 9, a transmission mechanism 38, an impact mechanism 10 and an output shaft 37. The rear end of the screw rod 7 is coaxially connected to the output shaft 37. The impact mechanism 10 is arranged between the output shaft 37 and the transmission mechanism 38 and connects the output shaft 37 and the transmission mechanism 38. The impact mechanism 10 is used to apply an impact force to the output shaft 37. The transmission mechanism 38 is connected to the driving motor 9. The transmission mechanism 38 is used to decelerate the rotation of the driving motor 9 and then transmit it to the output shaft 37.

[0048] The impact mechanism 10 includes an active impact cylinder 39, a passive impact cylinder 40 and a transmission shaft 41. The rear end of the transmission shaft 41 is connected to the drive motor 9 through a transmission mechanism 38. The front end of the transmission shaft 41 is rotatably connected to the rear end of the passive impact cylinder 40. The front end of the passive impact cylinder 40 is fixedly connected to the rear end of the output shaft 37. The active impact cylinder 39 is sleeved on the transmission shaft 41 and can slide along the transmission shaft 41. The output shaft 37, the passive impact cylinder 39, the transmission shaft 41 and the active impact cylinder 39 are all coaxial. Two active impact blocks 42 are circumferentially arranged on the front side of the active impact cylinder 39. A passive impact block 43 is arranged on the outer wall of the passive impact cylinder 40 at a position corresponding to the active impact block 42. The outer wall of the transmission shaft 41 is provided with two left-right symmetrical V-shaped ball channels 44. The V-shaped ball channel 44 is provided with a V-shaped ball channel that can slide along the V-shaped ball channel. The ball 45 rolls on the ball track 44, and the front part of the inner wall of the active impact cylinder 39 is provided with two left-right symmetrical receiving grooves 46, the direction of the receiving grooves 46 is parallel to the axis of the active impact cylinder 39, the receiving grooves 46 correspond to the V-shaped ball track 44 one by one, and the receiving grooves 46 are semi-cylindrical, half of the ball 45 is located in the corresponding V-shaped ball track 44, and the other half of the ball 45 is located in the corresponding receiving groove 46. A push ring 47 and a reset spring 50 are also sleeved on the transmission shaft 41, and the push ring 47 can slide along the transmission shaft 41. A groove 48 for accommodating the push ring 47 is provided on the rear side of the active impact cylinder 39, and the push ring 47 is located in the groove 48. An annular stopper 49 is provided at the rear end of the transmission shaft 41, and the front end of the reset spring 50 is connected to the push ring 47, and the rear end of the reset spring 50 is connected to the stopper 49.

[0049] The accommodating groove and the V-shaped ball track form a space for accommodating the rolling ball. The transmission mechanism is a planetary transmission mechanism. The tip of the V-shaped ball track is located at the front side. The ends of the two V-shaped ball tracks on the same side are connected to each other. The driving motor drives the transmission shaft to rotate after deceleration through the transmission mechanism. The rotating shaft drives the active impact tube to rotate through the rolling ball. The two active impact blocks of the active impact tube simultaneously impact the two passive impact blocks. The passive impact tube is impacted and drives the screw rod to rotate. When the main felling wedge is inserted into the crack of the tree trunk, the screw rod is subjected to resistance in the process of pushing the sub-falling wedge forward to extend out of the gap and is transmitted to the passive impact tube. When the resistance of the passive impact tube exceeds the set value, the active impact block cannot impact the passive impact block to rotate. The rolling ball is squeezed and moves backward along the ball track, driving the active impact tube to move backward. The active impact block is separated from the passive impact block and does not contact. When the active impact block rotates with the active impact tube and bypasses the passive impact block, the active impact tube moves forward and resets under the action of the reset spring. The rolling ball is driven forward by the active impact tube and returns to the front end of the V-shaped ball track. The active impact block can continue to rotate to impact the passive impact block.

[0050] A check assembly is symmetrically provided on the top surface of the main wedge 4, and the check assembly includes a plurality of first check blocks 13, and the plurality of first check blocks 13 are arranged in a straight line from front to back. A receiving groove 14 for receiving the first check block 13 is provided on the top surface of the main wedge 4 corresponding to the position of the first check block 13, and the bottom of the first check block 13 is located in the receiving groove 14 and is rotatably connected to the main wedge 4 through a rotating shaft. An elastic member 15 is provided in the receiving groove 14, and the elastic member 15 is used to drive the first check block 13 to rotate to an upward tilted state from front to back, so that the top of the first check block 13 extends upward out of the receiving groove 14.

[0051] The longitudinal section of the first check block 13 is teardrop-shaped. The large end 16 of the first check block 13 is rotatably connected to the main wedge 4 via a rotating shaft. The small end 17 of the first check block 13 extends upward from the receiving groove 14 under the action of the elastic member 15 .

[0052] The elastic member 15 is a spring sheet, and the spring sheet 15 is S-shaped. The large end 16 of the first check block 13 is located at the front side of the receiving groove 14, and a spring sheet fixing groove is provided at the front side of the receiving groove 14. The front part of the spring sheet is fixed in the spring sheet fixing groove, and the rear part of the spring sheet wraps the large end 16 of the first check block 13 from below.

[0053] like Figure 5 As shown, when no external force is applied, the first check block rotates to an upward tilted state from front to back under the action of the elastic member, the angle between the upper surface of the first check block and the horizontal plane can be 30-90 degrees, and the small end of the first check block extends upward out of the receiving groove. When the main wedge of the main felling wedge is inserted into the crack of the tree trunk, the first check block rotates toward the receiving groove under the pressure of the tree trunk, so that the main wedge can be smoothly inserted into the crack of the tree trunk. If the main wedge moves forward, the first check block will not generate resistance to the main wedge. If the main wedge moves backward, the first check block will rotate toward the upper side of the receiving groove under the action of the elastic member, and the small end of the first check block will be stuck with the tree trunk to prevent the main wedge from moving backward.

[0054] A claw 18 is provided at the top of the small end 17 of the first check block 13. Figure 6 As shown, the middle of the top of the small end portion 17 is inwardly recessed to form two symmetrical pointed blocks, which constitute claws 18. The claws 18 are convenient for clamping into trees and provide greater resistance to the backward movement of the main felling wedge.

[0055] A limiting notch 33 connected to the accommodating groove 14 is provided at the top of the rear side of the accommodating groove 14, and the bottom surface of the limiting notch 33 is inclined upward from front to back. When the first check block 13 rotates until its upper surface is nearly parallel to the upper surface of the main wedge 4, the small end 17 of the first check block 13 abuts against the bottom surface of the limiting notch 33.

[0056] The receiving groove 14 vertically penetrates the main wedge 4. During felling, wood chips and other debris are easily dropped into the receiving groove. The receiving groove penetrates the main wedge, so that the debris in the receiving groove can be discharged from the bottom.

[0057] The sub-logging wedge 2 includes a sub-wedge body 21, which is provided with a guide groove 22 that penetrates the sub-wedge body 21 along the left-right direction. The guide groove 22 is arranged along the front-back direction. A guide column 23 that passes through the guide groove 22 is provided in the notch 3, and the guide column 23 can slide along the guide groove 22.

[0058] There are multiple second check blocks 24 evenly distributed on the top surface of the sub-wedge body 21. The second check blocks 24 are triangular in shape. The left and right side walls of the second check blocks 24 are inclined inward from front to back. The top surface of the second check blocks 24 is inclined upward from front to back. The front end of the top surface of the second check blocks 24 is connected to the top surface of the sub-wedge body 21.

[0059] The main wedge 4 is a right triangle, and the sub-wedge 21 is a right triangle. The top surface of the main wedge 4 and the top surface of the sub-wedge 21 are located in the same plane. The top surface of the connecting block 5 is composed of an inclined surface 19 located on the front side and a horizontal surface 20 located on the rear side. The inclined surface 19 and the top surface of the main wedge 4 are located in the same plane.

[0060] When the sub-wedge is located in the crack of the tree trunk, if the sub-wedge moves forward, the second check block will not generate resistance to the sub-wedge; if the sub-wedge moves backward, the second check block is stuck with the tree trunk, preventing the main wedge from moving backward.

[0061] In this solution, a first check block is provided on the main felling wedge, and a second check block is provided on the sub-falling wedge, so the main felling wedge and the sub-falling wedge can only move forward and cannot move backward when they are in the crack of the tree trunk.

[0062] When in use, the lumberjack first uses an electric saw to saw a crack in the tree trunk, inserts the main felling wedge into the crack, starts the electric felling wedge, and the drive module drives the screw rod to rotate forward. The main felling wedge cannot retreat under the action of the first check block, and the screw rod moves forward, pushing the sub-felling wedge forward to extend the gap and expand the crack. When the sub-felling wedge is extended forward to the limit position, if the tree has not been felled, the drive module drives the screw rod to rotate in the opposite direction. Since the sub-felling wedge cannot retreat under the action of the second check block, the screw rod rotates through the screw rod nut to push the main felling wedge forward, so that the sub-felling wedge retracts into the gap, completing the overall forward movement of the electric felling wedge. Afterwards, the drive module drives the screw rod to rotate forward, thereby driving the sub-felling wedge to extend the gap forward and further expand the crack. If the tree has not been felled, the drive module drives the screw rod to rotate in the opposite direction, thereby driving the main felling wedge to move forward, so that the sub-felling wedge retracts into the gap, and so on.

[0063] During the entire felling process, the electric felling wedge automatically completes the entire felling process. It is easy to operate, saves time and effort, and does not require workers to operate close to the tree during the entire process, eliminating safety hazards. It can be used for trees of any diameter and has strong applicability.

[0064] A controller 25 is provided in the cavity 6, and the controller 25 is electrically connected to the driving motor 9, and the controller is used to control the operation of the electric felling wedge. A battery 26 is provided at the rear side of the connecting block 5, and the battery 26 is detachably connected to the connecting block 5, and the battery 26 is used to power the electric felling wedge.

[0065] The electric felling wedge also includes a metal shell 29 and a metal cover plate 30. The top and rear end of the metal shell 29 are open. The metal shell 30 is used to cover the bottom, left side and right side of the main felling wedge 1. The metal cover plate 30 matches the top opening of the metal shell 29. The metal cover plate 30 is used to cover the top surface of the main felling wedge 1. The battery 26 is located behind the rear end opening of the metal shell 29. The front side of the metal cover plate 30 is provided with a first opening 34, which matches the notch 3. The metal cover plate 30 is provided with a strip hole 35 at a position corresponding to the receiving groove 14. The strip hole 35 is used for the first check block 13 to pass through when rotating. The front side of the bottom of the metal shell 29 is provided with a second opening 36, which matches the notch 3. The bottom surface of the metal shell 29 is provided with a chip removal opening 31 at a position corresponding to the receiving groove 14. The chip removal opening 31 is connected to the corresponding receiving groove 14. The first opening does not block the top surface of the sub-falling wedge, and the second opening does not block the bottom surface of the sub-falling wedge. The chip discharge port facilitates the discharge of the chips in the receiving groove.

[0066] The metal shell 29 is symmetrically provided with handles 27 on the left and right sides, and the handles 27 are located at the rear side of the metal shell 29. The rear end of the handles 27 is provided with a strap buckle 28. The handles are convenient for users to hold the electric felling wedge, and the strap buckle can be used to install a strap, so that the electric felling wedge is easy to carry.

[0067] A wireless communication module may also be provided in the cavity 6, and the wireless communication module is electrically connected to the controller 25. The user can communicate with the wireless communication module wirelessly through a remote control device such as a mobile phone or a remote controller to remotely control the operation of the electric felling wedge.

[0068] The sub-wedge 21 or the top surface of the main wedge 4 may be provided with a sensor, which is used to sense whether there is an obstruction above it, and the sensor is electrically connected to the controller. The sensor may be a distance sensor. When felling trees, the main felling wedge is inserted into the crack, and the electric felling wedge is started. The distance sensor detects that there is an obstruction above it, and the driving mechanism drives the sub-falling wedge to extend forward through the gap to expand the crack. When the sub-falling wedge extends forward to the limit position, if the tree has not been felled, the driving mechanism drives the main felling wedge to move forward, so that the sub-falling wedge retracts into the gap. After that, the driving mechanism drives the sub-falling wedge to extend forward through the gap to further expand the crack. If the tree has not been felled, the driving mechanism drives the main felling wedge to move forward, so that the sub-falling wedge retracts into the gap, and the cycle continues until the distance sensor detects that there is no obstruction above it, and the controller determines that the tree has been felled, and controls the electric felling wedge to stop working.

Claims

1. An electric felling wedge, characterized in that: The utility model comprises a main felling wedge (1) and a sub-falling wedge (2); the front side of the main felling wedge (1) is provided with a notch (3) for accommodating the sub-falling wedge (2); the main felling wedge (1) is provided with a driving mechanism for driving the sub-falling wedge (2) to extend forward / retract into the notch (3).

2. An electric felling wedge according to claim 1, characterized in that: The main felling wedge (1) comprises a main wedge (4) and a connecting block (5), wherein the connecting block (5) is arranged at the rear side of the main wedge (4), the notch (3) is located at the front side of the main wedge (4), and the connecting block (5) is provided with a cavity (6) with a front opening. The driving mechanism comprises a screw (7), a screw nut (8) and a driving module. A through hole (32) is provided at the rear side of the main wedge (4), the notch (3) is connected to the cavity (6) through the through hole (32), and the screw nut (8) is arranged in the through hole (32). ) and is fixedly connected to the main wedge (4), the screw nut (8) is sleeved on the screw (7), the front end of the screw (7) is rotatably connected to the rear end of the sub-logging wedge (2), the rear end of the screw (7) extends into the cavity (6) and is connected to the driving module, the driving module is used to drive the screw (7) to rotate, the cavity (6) is provided with a guide rail (11) arranged along the front and rear direction, the guide rail (11) is provided with a slider (12) that can slide along the guide rail (11), and the driving module is fixed on the slider (12).

3. An electric felling wedge according to claim 2, characterized in that: The top surface of the main wedge (4) is symmetrically provided with a check assembly, and the check assembly includes a plurality of first check blocks (13). The top surface of the main wedge (4) is provided with a receiving groove (14) for receiving the first check block (13) at a position corresponding to the first check block (13). The bottom of the first check block (13) is located in the receiving groove (14) and is rotatably connected to the main wedge (4) via a rotating shaft. An elastic member (15) is provided in the receiving groove (14). The elastic member (15) is used to drive the first check block (13) to rotate to an upward tilted state from front to back, so that the top of the first check block (13) extends upward out of the receiving groove (14).

4. An electric felling wedge according to claim 3, characterized in that: The longitudinal section of the first check block (13) is in the shape of a water drop. The large end of the first check block (13) is rotatably connected to the main wedge (4) via a rotating shaft. The small end (17) of the first check block (13) extends upward from the receiving groove (14) under the action of the elastic member (15).

5. An electric felling wedge according to claim 4, characterized in that: A claw (18) is provided at the top of the small end portion (17).

6. An electric felling wedge according to claim 2, characterized in that: The top surface of the main wedge (4) and the top surface of the sub-logging wedge (2) are located in the same plane.

7. An electric felling wedge according to claim 2, characterized in that: The driving module comprises a driving motor (9), a transmission mechanism (38), an impact mechanism (10) and an output shaft (37); the rear end of the screw rod (7) is coaxially connected to the output shaft (37); the impact mechanism (10) is arranged between the output shaft (37) and the transmission mechanism (38) and connects the output shaft (37) and the transmission mechanism (38); the impact mechanism (10) is used to apply an impact force to the output shaft (37); the transmission mechanism (38) is connected to the driving motor (9); and the transmission mechanism (38) is used to decelerate the rotation of the driving motor (9) and transmit it to the output shaft (37).

8. An electric felling wedge according to claim 3, characterized in that: The receiving groove (14) passes through the main wedge (4) in the vertical direction.

9. An electric felling wedge according to claim 1, characterized in that: The sub-logging wedge (2) comprises a sub-wedge body (21), the sub-wedge body (21) is provided with a guide groove (22) penetrating the sub-wedge body (21) in the left-right direction, the guide groove (22) is arranged along the front-back direction, and the notch (3) is provided with a guide column (23) passing through the guide groove (22), and the guide column (23) can slide along the guide groove (22).

10. An electric felling wedge according to claim 9, characterized in that: A plurality of second check blocks (24) are evenly distributed on the top surface of the sub-wedge (21), the second check blocks (24) are triangular in shape, the left and right side walls of the second check blocks (24) are inclined inward from front to back, the top surface of the second check blocks (24) is inclined upward from front to back, and the front end of the top surface of the second check blocks (24) is connected to the top surface of the sub-wedge (21).

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