Electric log wedge

Abstract

The utility model discloses an electric felling wedge. It comprises a main felling wedge block and a sub felling wedge block, the bottom of the main felling wedge block is provided with a gap for accommodating the sub felling wedge block, the rear side of the main felling wedge block is provided with a driving mechanism for driving the sub felling wedge block to extend forwardly / withdraw into the gap, and the top surface of the main felling wedge block and the bottom surface of the sub felling wedge block are both provided with a check structure. The utility model can automatically move to the inside of the trunk split when felling, and the whole felling process does not need the felling worker to operate closely, eliminates the hidden danger, is simple to operate, saves time and energy.

Description

Technical Field

[0001] This utility model relates to the field of logging tools, and in particular to an electric logging wedge. Background Technology

[0002] Currently, chainsaws are the most commonly used logging tool. However, it is dangerous for loggers to operate chainsaws close to the ground, and it is impossible to control the direction of the falling trees, posing a safety hazard to pedestrians and surrounding buildings. To solve these problems, electric logging wedges have been invented. Using electric logging wedges can control the direction of the falling trees, and loggers do not need to be close to the ground to cut trees, thus improving logging safety.

[0003] Existing electric logging wedges consist of a wedge with a check valve on its top surface and a propulsion device. In use, loggers first use an electric saw to cut a slit in the tree trunk, insert the wedge into the slit, and activate the propulsion device. The device pushes the wedge deeper into the slit, widening it. When the wedge reaches a certain depth, the tree falls in a predetermined direction, completing the felling. However, when using existing electric logging wedges to fell large trees, due to the large trunk diameter, even when the propulsion device pushes the wedge to its maximum position within the slit, it may still be insufficient to fell the large tree. In this case, loggers need to insert ordinary wedges into the slit for support, reset the electric logging wedge, push it to the innermost part of the slit, and restart the electric logging wedge. This cycle continues until the large tree is felled. Because this requires close-range operation by the logger, it poses safety hazards and is cumbersome, time-consuming, and labor-intensive. Summary of the Invention

[0004] To solve the above-mentioned technical problems, this utility model provides an electric logging wedge that can automatically move towards the inside of the trunk crack during logging. The entire logging process does not require loggers to operate it closely, eliminating safety hazards. It is simple to operate and saves time and effort.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] The electric logging wedge of this utility model includes a main logging wedge block and a secondary logging wedge block. The bottom of the main logging wedge block is provided with a notch for accommodating the secondary logging wedge block. The rear side of the main logging wedge block is provided with a driving mechanism for driving the secondary logging wedge block to extend forward / retract from the notch. The top surface of the main logging wedge block and the bottom surface of the secondary logging wedge block are provided with a check structure.

[0007] In this design, both the top surface of the main logging wedge and the bottom surface of the secondary logging wedge are equipped with anti-reverse structures, which ensure that the main logging wedge and the secondary logging wedge can only move forward and cannot move backward when they are in the crack in the tree trunk.

[0008] In operation, loggers first use an electric saw to cut a slit in the tree trunk, insert the main logging wedge into the slit, and start the electric logging wedge. The drive mechanism drives the secondary logging wedge to extend forward beyond the slit. The main logging wedge is held in place by the tree by the anti-reverse mechanism on its top surface and cannot move backward. When the secondary logging wedge extends forward to its limit, the drive mechanism drives it to retract. Because the secondary logging wedge has an anti-reverse mechanism on its bottom surface, it is held in place by the tree and cannot move backward. This causes the main logging wedge to move forward, causing the secondary logging wedge to retract, thus completing the overall forward movement of the electric logging wedge and widening the slit. Then, the drive mechanism drives the secondary logging wedge to extend forward beyond the slit. When the secondary logging wedge extends forward to its limit, the drive mechanism drives it to retract, thus moving the main logging wedge forward. This cycle continues until the tree is felled.

[0009] Preferably, the main logging wedge includes a main wedge body and a connector. The connector is located on the rear side of the main wedge body, and the driving mechanism is fixedly connected to the connector. The top surface of the main wedge body is a first inclined surface that slopes upward from front to back, and the bottom surface of the main wedge body is a second inclined surface that slopes downward from front to back. The notch is located on the second inclined surface.

[0010] Preferably, the front end of the first inclined surface is connected to the front end of the second inclined surface, and the bottom surface of the sub-logging wedge is a third inclined surface that slopes downward from front to back. The third inclined surface is parallel to the second inclined surface.

[0011] Preferably, when the sub-logging wedge retracts into the notch, the longitudinal section of the whole formed by the main wedge and the sub-logging wedge is an isosceles triangle with the base of the isosceles triangle being vertical; the longitudinal section of the sub-logging wedge is a right triangle with the hypotenuse of the right triangle located on the third inclined plane, the longer leg of the right triangle being horizontal, and the shorter leg of the right triangle being vertical.

[0012] When the secondary logging wedge moves forward, it pushes the primary logging wedge upward, making the check mechanism on the top surface of the primary logging wedge more tightly contact the tree. Conversely, when the primary logging wedge moves forward, it pushes the secondary logging wedge downward, making the check mechanism on the bottom surface of the secondary logging wedge more tightly contact the tree. The check mechanism is located on the top surface of the primary logging wedge and the bottom surface of the secondary logging wedge, resulting in a large contact area with the tree and a good check mechanism effect.

[0013] Preferably, the main wedge includes a first wedge block and plates symmetrically arranged on the left and right sides of the first wedge block. The first wedge block has a first connecting notch on its rear side, and a first connecting block matching the first connecting notch is provided in the first connecting notch. The first wedge block is detachably connected to the plate, the first connecting block is detachably connected to the plate, the first wedge block is detachably connected to the first connecting block, and the connecting piece is fixedly connected to the rear side of the first connecting block.

[0014] The first wedge needs to be replaced after prolonged use and wear. The first wedge is detachably connected to the first connecting block and the plate, making it easy to disassemble and replace.

[0015] Preferably, the sub-logging wedge includes a second wedge, the second wedge having a second connecting notch on its rear side, and a second connecting block matching the second connecting notch being provided inside the second connecting notch, the second wedge and the second connecting block being detachably connected.

[0016] The second wedge needs to be replaced after prolonged use and wear. The second wedge and the second connecting block are detachably connected, making it easy to disassemble and replace.

[0017] Preferably, the first connecting notch has a first limiting notch on its front side, the first connecting block has a first limiting block matching the first limiting notch on its front side, the upper surface of the first connecting block has a plurality of second limiting notches, the top of the first connecting notch has a second limiting block matching the second limiting notch at a position corresponding to the second limiting notch, the second connecting notch has a third limiting notch on its front side, the second connecting block has a third limiting block matching the third limiting notch on its front side, the lower surface of the second connecting block has a plurality of fourth limiting notches, and the bottom of the second connecting notch has a fourth limiting block matching the fourth limiting notch at a position corresponding to the fourth limiting notch.

[0018] The first limiting block is used to restrict the vertical movement of the first connecting block, the second limiting block is used to restrict the forward and backward movement of the second connecting block, the third limiting block is used to restrict the vertical movement of the second connecting block, and the fourth limiting block is used to restrict the forward and backward movement of the second connecting block.

[0019] Preferably, the connector has a through hole that communicates with the notch. The driving mechanism includes a lead screw, a lead screw nut, and a driving module. The driving module is fixedly connected to the connector. The lead screw passes through the through hole and extends into the notch. The lead screw nut is sleeved on the lead screw and fixedly connected to the log wedge. The driving module is used to drive the lead screw to rotate. The plate has a strip-shaped guide hole arranged along the front-back direction that communicates with the notch. The second connecting block has guide posts symmetrically arranged on the left and right sides. The guide posts pass through the strip-shaped guide hole on the corresponding side and can slide back and forth along the strip-shaped guide hole.

[0020] When the drive module drives the lead screw to rotate in the forward direction, the lead screw nut moves forward, pushing the sub-logging wedge block forward out of the notch. When the drive module drives the lead screw to rotate in the reverse direction, the lead screw nut moves backward, pulling the sub-logging wedge block backward back into the notch.

[0021] Preferably, the bottom surface of the first connecting block is provided with a guide groove arranged along the front and back direction, the top surface of the second connecting block is provided with a guide block that matches the guide groove, the guide block is located in the guide groove and can slide back and forth along the guide groove, the front side of the guide groove is provided with a first limiting surface that tilts backward, and the front side of the guide block is provided with a second limiting surface that matches the first limiting surface.

[0022] When the log wedge extends forward to its limit position, the first limiting surface comes into contact with the second limiting surface.

[0023] Preferably, the anti-return structure includes multiple protrusions arranged side by side from front to back, the protrusions are arranged in a left-right direction, the longitudinal section of the protrusions is triangular, and the top surface of the protrusions is inclined from front to back towards the side away from the main logging wedge.

[0024] The top surface of the protrusion on the main logging wedge slopes upward from front to back, while the top surface of the protrusion on the secondary logging wedge slopes downward from front to back.

[0025] Preferably, the drive module includes a drive motor, a transmission mechanism, an impact mechanism, and an output shaft. The rear end of the lead screw is coaxially connected to the output shaft. The impact mechanism is disposed 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 is used to reduce the rotation of the drive motor and transmit it to the output shaft.

[0026] The drive motor, after being reduced in speed through a transmission mechanism, drives the impact mechanism to apply a rotational impact force to the lead screw, thereby driving the lead screw to rotate. The transmission mechanism is a speed reducer.

[0027] Preferably, the impact mechanism includes an active impact cylinder, a passive impact cylinder, and a drive shaft. The rear end of the drive shaft is connected to a drive motor via a transmission mechanism, the front end of the drive shaft is rotatably connected to the rear end of the passive impact cylinder, and the front end of the passive impact cylinder is fixedly connected to the rear end of the output shaft. The active impact cylinder is sleeved on the drive shaft and can slide along the drive shaft. The output shaft, passive impact cylinder, drive shaft, and active impact cylinder are all coaxial. Two active impact blocks are provided circumferentially on the front side of the active impact cylinder, and passive impact blocks are provided on the outer wall of the passive impact cylinder at positions corresponding to the active impact blocks. The outer wall of the drive shaft is provided with two symmetrical V-shaped ball tracks. The device contains a rolling ball that can roll along a V-shaped track. The front of the inner wall of the active impact cylinder has two symmetrical receiving grooves. The direction of the receiving grooves is parallel to the axis of the active impact cylinder. The receiving grooves correspond one-to-one with the V-shaped track. The receiving grooves are semi-cylindrical. Half of the rolling ball is located in the corresponding V-shaped track, and the other half of the rolling ball is located in the corresponding receiving groove. A push ring and a return spring are also fitted on the drive shaft. The push ring can slide along the drive shaft. The rear side of the active impact cylinder has a groove for accommodating the push ring. The push ring is located in the groove. The rear end of the drive shaft has an annular stop. The front end of the return spring is connected to the push ring, and the rear end of the return spring is connected to the stop.

[0028] Preferably, a protective shell is provided on the rear side of the main logging wedge, the drive mechanism is located inside the protective shell, and a battery pack for powering the electric logging wedge is provided at the rear end of the protective shell, the battery pack being detachably connected to the protective shell.

[0029] Preferably, the protective shell is equipped with a controller, which is electrically connected to the drive motor and is used to control the operation of the electric logging wedge.

[0030] Preferably, the protective shell also houses a wireless communication module, which is electrically connected to the controller. Users can wirelessly communicate with the wireless communication module via mobile phones, remote controls, or other remote control devices to remotely control the operation of the electric logging wedge.

[0031] Preferably, the main logging wedge is provided with symmetrical handles on both sides. The handles are located on the rear side of the plate, and a shoulder strap buckle is provided at the rear end of the handle. The handles make it easy for the user to hold the electric logging wedge, and the shoulder strap buckle can be used to install a shoulder strap, making the electric logging wedge easy to carry.

[0032] Preferably, the top surface of the main logging wedge is 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.

[0033] The beneficial effects of this utility model are: (1) It can automatically move towards the inside of the trunk crack during logging, and the entire logging process does not require logging workers to operate it closely, eliminating safety hazards. It is simple to operate, saves time and effort, and is suitable for trees of any diameter, with strong applicability. (2) The anti-return structure is located on the top surface of the main logging wedge and the bottom surface of the secondary logging wedge, with a large contact area with the tree and a good anti-return effect. (3) The first wedge and the second wedge are easy to disassemble and assemble, and easy to replace after wear. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of Example 1;

[0035] Figure 2 This is a schematic diagram of the extended state of the sub-logging wedge in Example 1;

[0036] Figure 3 This is a schematic diagram of the internal structure of Example 1;

[0037] Figure 4 This is a top view of Embodiment 1;

[0038] Figure 5 yes Figure 4 AA section view;

[0039] Figure 6 This is a structural schematic diagram of the first wedge and the first connecting block;

[0040] Figure 7 This is a schematic diagram of the structure of the first connecting block;

[0041] Figure 8 This is an exploded view of a logging wedge.

[0042] Figure 9 This is an assembly drawing of the transmission mechanism, impact mechanism, and output shaft of Embodiment 2;

[0043] Figure 10 yes Figure 9 Internal structure diagram;

[0044] Figure 11 This is a schematic diagram of the drive shaft structure;

[0045] Figure 12 This is a schematic diagram of the active impact cylinder;

[0046] Figure 13 It is a cross-sectional view of the assembly consisting of the active impact cylinder and the drive shaft.

[0047] In the diagram: 1. Main logging wedge, 2. Secondary logging wedge, 3. Notch, 4. Check valve, 5. Connector, 6. First wedge, 7. Plate, 8. First connecting notch, 9. First connecting block, 10. Second wedge, 11. Second connecting notch, 12. Second connecting block, 1 3. First limiting notch, 14. First limiting block, 15. Second limiting notch, 16. Second limiting block, 17. Third limiting notch, 1 8. Third limiting block, 1 9. Fourth limiting notch; 20. Fourth limiting block; 21. Through hole; 22. Lead screw; 23. Lead screw nut; 24. Drive module; 25. Strip guide hole; 26. Guide post; 27. Screw head; 28. Moving groove; 29. ​​Guide groove; 30. Guide block; 31. First limiting surface; 32. Second limiting surface; 33. Limit switch; 34. Protruding strip; 35. Drive motor; 36. Transmission mechanism; 37. Impact mechanism; 38. Output shaft; 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. Stop block; 50. Return spring; 51. Protective shell; 52. Battery pack; 53. Handle; 54. Threaded hole; 55. Second inclined surface. Detailed Implementation

[0048] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0049] Example 1: The electric logging wedge of this example, such as Figures 1 to 8 As shown, it includes a main logging wedge 1 and a secondary logging wedge 2. The front side of the bottom of the main logging wedge 1 is provided with a notch 3 for accommodating the secondary logging wedge 2. The rear side of the main logging wedge 1 is provided with a driving mechanism for driving the secondary logging wedge 2 to extend forward / retract from the notch 3. The top surface of the main logging wedge 1 and the bottom surface of the secondary logging wedge 2 are both provided with a check structure 4.

[0050] The main logging wedge 1 includes a main wedge body and a connector 5. The connector 5 is located on the rear side of the main wedge body. The drive mechanism is fixedly connected to the connector 5. The top surface of the main wedge body is a first inclined surface that slopes upward from front to back. The bottom surface of the main wedge body is a second inclined surface 55 that slopes downward from front to back. The notch 3 is located on the second inclined surface 55.

[0051] The front end of the first inclined plane is connected to the front end of the second inclined plane by a rounded corner. The bottom surface of the log wedge 2 is a third inclined plane that slopes downward from front to back, and the third inclined plane is parallel to the second inclined plane. Preferably, the third inclined plane and the second inclined plane are located in the same plane.

[0052] When the sub-logging wedge 2 retracts into the notch 3, the longitudinal section of the whole formed by the main wedge and the sub-logging wedge 2 is an isosceles triangle with the base of the isosceles triangle being vertical; the longitudinal section of the sub-logging wedge 2 is a right triangle with the hypotenuse of the right triangle located on the third inclined plane, the longer leg of the right triangle being horizontal, and the shorter leg of the right triangle being vertical.

[0053] A protective shell 51 is provided on the rear side of the connector 5, and the drive mechanism is located inside the protective shell 51. A battery pack 52 for powering the electric logging wedge is provided at the rear end of the protective shell 51. The battery pack 52 is detachably connected to the protective shell 51.

[0054] The check structure 4 includes multiple protrusions 34 arranged side by side from front to back, with the protrusions 34 oriented laterally. The longitudinal section of each protrusion 34 is triangular, and the top surface of each protrusion 34 slopes away from the main logging wedge 1 from front to back. Specifically, the top surface of the protrusion 34 on the main logging wedge 1 slopes upward from front to back, while the top surface of the protrusion 34 on the secondary logging wedge 2 slopes downward from front to back. Preferably, the longitudinal section of each protrusion 34 is a right-angled triangle or an obtuse-angled triangle.

[0055] In this scheme, the top surface of the main logging wedge and the bottom surface of the secondary logging wedge are equipped with a backstop structure. The longitudinal section of the backstop structure is a backward-inclined sawtooth shape, so that the main logging wedge and the secondary logging wedge can only move forward and cannot move backward when they are in the trunk crack.

[0056] In operation, loggers first use an electric saw to cut a slit in the tree trunk, insert the main logging wedge into the slit, and start the electric logging wedge. The drive mechanism drives the secondary logging wedge to extend forward beyond the slit. The main logging wedge is stuck in the tree by the anti-reverse mechanism on its top surface and cannot move backward. When the secondary logging wedge extends forward to its limit, the drive mechanism drives it to retract. Because the secondary logging wedge is stuck in the tree by the anti-reverse mechanism on its bottom surface and cannot move backward, the main logging wedge moves forward, causing the secondary logging wedge to retract. This completes the overall forward movement of the electric logging wedge, widening the slit. Then, the drive mechanism drives the secondary logging wedge to extend forward beyond the slit. When the secondary logging wedge extends forward to its limit, the drive mechanism drives it to retract. This cycle continues until the tree is felled.

[0057] Because the longitudinal section of the main wedge and the secondary logging wedge is an isosceles triangle with a vertical base, while the longitudinal section of the secondary logging wedge is a right-angled triangle, the movement of the secondary logging wedge forward pushes the main logging wedge upward, making the anti-return structure on the top surface of the main logging wedge in closer contact with the tree. Conversely, the movement of the main logging wedge forward pushes the secondary logging wedge downward, making the anti-return structure on the bottom surface of the secondary logging wedge in closer contact with the tree. The anti-return structure is located on the top surface of the main logging wedge and the bottom surface of the secondary logging wedge, resulting in a large contact area with the tree and a good anti-return effect.

[0058] Throughout the logging process, the electric logging wedge automatically completes the entire logging process. It is simple to operate, saves time and labor, and requires no workers to operate it, eliminating safety hazards. It can be used for trees of any diameter and has strong applicability.

[0059] The main wedge includes a first wedge block 6 and plates 7 symmetrically arranged on the left and right sides of the first wedge block 6. A first connecting notch 8 is provided on the rear side of the first wedge block 6. A first connecting block 9 matching the first connecting notch 8 is provided in the first connecting notch 8. The first wedge block 6 and the plates 7 are detachably connected by screws. The first connecting block 9 and the plates 7 are detachably connected by screws. The first wedge block 6 and the first connecting block 9 are detachably connected by screws. The connecting piece 5 is fixedly connected to the rear side of the first connecting block 9.

[0060] The sub-logging wedge 2 includes a second wedge 10, a second connecting notch 11 is provided on the rear side of the second wedge 10, and a second connecting block 12 matching the second connecting notch 11 is provided in the second connecting notch 11. The second wedge 10 and the second connecting block 12 are detachably connected by screws.

[0061] When using electric logging wedges, the first and second wedges interact with the trees for extended periods, causing wear and tear on the anti-return mechanism, necessitating frequent replacement. The first wedge is detachably connected to the first connecting block and the plate, while the second wedge is detachably connected to the second connecting block, facilitating easy disassembly and replacement.

[0062] The first connecting notch 8 has a first limiting notch 13 on its front side, the first connecting block 9 has a first limiting block 14 that matches the first limiting notch 13 on its front side, the upper surface of the first connecting block 9 has two second limiting notches 15, the top of the first connecting notch 8 has a second limiting block 16 that matches the second limiting notch 15 at the position corresponding to the second limiting notch 15, the second connecting notch 11 has a third limiting notch 17 on its front side, the second connecting block 12 has a third limiting block 18 that matches the third limiting notch 17 on its front side, the lower surface of the second connecting block 12 has two fourth limiting notches 19, and the bottom of the second connecting notch 15 has a fourth limiting block 20 that matches the fourth limiting notch 19 at the position corresponding to the fourth limiting notch 19.

[0063] The first limiting block is used to restrict the vertical movement of the first connecting block, the second limiting block is used to restrict the forward and backward movement of the second connecting block, the third limiting block is used to restrict the vertical movement of the second connecting block, and the fourth limiting block is used to restrict the forward and backward movement of the second connecting block.

[0064] The connector 5 has a through hole 21, which communicates with the notch 3. The driving mechanism includes a lead screw 22, a lead screw nut 23, and a driving module 24. The driving module 24 is fixedly connected to the connector 5. The lead screw 22 passes through the through hole 21 and extends into the notch 3. The lead screw nut 23 is sleeved on the lead screw 22 and fixedly connected to the log wedge block 2. The driving module 24 is used to drive the lead screw 22 to rotate. The second connecting block 12 has a moving groove 28 for the lead screw 22 to move back and forth. The plate 7 has a strip-shaped guide hole 25 arranged along the front and back direction. The strip-shaped guide hole 25 communicates with the notch 3. The second connecting block 12 has symmetrical guide posts 26 on the left and right sides. The guide posts 26 pass through the strip-shaped guide hole 25 on the corresponding side and can slide back and forth along the strip-shaped guide hole 25.

[0065] The bottom surface of the first connecting block 9 is provided with a guide groove 29 arranged along the front and back direction, and the top surface of the second connecting block 12 is provided with a guide block 30 that matches the guide groove 29. The guide block 30 is located in the guide groove 29 and can slide back and forth along the guide groove 29. The front side of the guide groove 29 is provided with a first limiting surface 31 that is tilted backward, and the front side of the guide block 30 is provided with a second limiting surface 32 that matches the first limiting surface 31.

[0066] Limit switches 33 are provided at both ends of the side wall of the guide groove 29. A controller is provided inside the protective shell 51. The controller is electrically connected to the drive module 24 and the limit switches 33. The controller is used to control the operation of the electric logging wedge.

[0067] When the drive module drives the lead screw to rotate in the forward direction, the lead screw nut moves forward, pushing the sub-logging wedge block to extend forward out of the notch. The guide post moves forward along the strip guide hole. When the guide block contacts the limit switch at the front end of the guide groove sidewall, the first limit surface contacts the second limit surface, and the sub-logging wedge block extends forward to the front limit position. The limit switch at the front end of the guide groove sidewall sends a trigger signal to the controller, and the controller controls the drive module to drive the lead screw to rotate in the reverse direction.

[0068] When the drive module drives the lead screw to rotate in the reverse direction, the lead screw nut moves backward, pulling the sub-logging wedge block back into the notch. The guide post moves backward along the strip guide hole. When the guide block contacts the limit switch at the rear end of the guide groove sidewall, the sub-logging wedge block retracts to the rear limit position. The limit switch at the rear end of the guide groove sidewall sends a trigger signal to the controller, and the controller controls the drive module to drive the lead screw to rotate in the forward direction.

[0069] The guide post 26 has an external thread on its inner side, and the second connecting block 12 has a threaded hole 54 that matches the external thread. The guide post 26 has a coaxial screw head 27 on its outer end, which facilitates the replacement of the guide post.

[0070] The main logging wedge 1 has symmetrical handles 53 on both sides. The handles 53 are located on the rear side of the plate body 7, and the rear end of the handles 53 has a shoulder strap buckle. The handles make it easy for users to hold the electric logging wedge, and the shoulder strap buckle can be used to install a shoulder strap, making the electric logging wedge easy to carry.

[0071] The protective casing 51 also houses a wireless communication module, which is electrically connected to the controller. Users can communicate wirelessly with the wireless communication module via mobile phones, remote controls, or other remote control devices to remotely control the operation of the electric logging wedge.

[0072] Preferably, a sensor can be installed on the top surface of the main logging wedge 1. The sensor is used to detect whether there is an obstruction above it, and the sensor is electrically connected to the controller. The sensor can be a distance sensor. During logging, the main logging wedge is inserted into a crack in the tree trunk, activating the electric logging wedge. When a distance sensor detects an obstruction above it, the drive mechanism extends the secondary logging wedge forward beyond the notch. When the secondary logging wedge reaches its maximum extension, the drive mechanism retracts it. Because the secondary logging wedge cannot move backward due to the check mechanism, the main logging wedge moves forward, causing the secondary logging wedge to retract. The entire electric logging wedge moves forward, widening the crack. If the tree has not yet been felled, the drive mechanism extends the secondary logging wedge forward again. When the secondary logging wedge reaches its maximum extension, the drive mechanism retracts it, and the entire electric logging wedge continues to move forward, widening the crack. This cycle continues until the distance sensor detects no obstruction above it. The controller then determines that the tree has been felled and stops the electric logging wedge.

[0073] Example 2: The electric logging wedge in this example is the same as that in Example 1, except that the drive module is different.

[0074] like Figures 9 to 1 As shown in Figure 3, the drive module 24 includes a drive motor 35, a transmission mechanism 36, an impact mechanism 37, and an output shaft 38. The rear end of the lead screw 22 is coaxially connected to the output shaft 38. The impact mechanism 37 is disposed between the output shaft 38 and the transmission mechanism 36 and connects the output shaft 38 and the transmission mechanism 36. The impact mechanism 37 is used to apply an impact force to the output shaft 38. The transmission mechanism 36 is connected to the drive motor 35 and is used to reduce the rotation of the drive motor 35 and transmit it to the output shaft 38.

[0075] The drive motor reduces speed through the transmission mechanism and then drives the impact mechanism to apply a rotational impact force to the lead screw, thereby driving the lead screw to rotate.

[0076] Impact mechanism 37 includes an active impact cylinder 39, a passive impact cylinder 40, and a drive shaft 41. The rear end of the drive shaft 41 is connected to the drive motor 35 via a transmission mechanism 36. The front end of the drive 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 38. The active impact cylinder 39 is sleeved on the drive shaft 41 and can slide along the drive shaft 41. The output shaft 38, the passive impact cylinder 40, the drive shaft 41, and the active impact cylinder 39 are all coaxial. Two active impact blocks 42 are provided circumferentially on the front side of the active impact cylinder 39. A passive impact block 43 is provided on the outer wall of the passive impact cylinder 40 at a position corresponding to the active impact block 42. Two symmetrical V-shaped ball tracks 44 are provided on the outer wall of the drive shaft 41. Inside the V-shaped ball tracks 44, there are ball tracks that can slide along the V-shaped ball tracks. The ball 45 rolls on the ball track 44. The front part of the inner wall of the active impact cylinder 39 is provided with two 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 one-to-one with the V-shaped ball track 44. 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 return spring 50 are also sleeved on the drive shaft 41. The push ring 47 can slide along the drive shaft 41. The rear side of the active impact cylinder 39 is provided with a groove 48 for receiving the push ring 47. The push ring 47 is located in the groove 48. The rear end of the drive shaft 41 is provided with an annular stop block 49. The front end of the return spring 50 is connected to the push ring 47, and the rear end of the return spring 50 is connected to the stop block 49.

[0077] The receiving groove and the V-shaped ball track form a space to accommodate the rolling balls. The transmission mechanism is a planetary reducer. The tip of the V-shaped ball track is located at the front, and the ends of the two V-shaped ball tracks on the same side are connected to each other. The drive motor drives the transmission shaft to rotate after being reduced in speed by the transmission mechanism. The rotating shaft drives the active impact cylinder to rotate through the rolling balls. The two active impact blocks of the active impact cylinder simultaneously impact the two passive impact blocks. The passive impact cylinder is impacted and drives the screw to rotate. When the main logging wedge is inserted into the trunk crack, the screw rotates and pushes the secondary logging wedge forward to extend out of the notch. During this process, the screw encounters resistance, which is transmitted to the passive impact cylinder. When the resistance encountered by the passive impact cylinder exceeds the set value, the active impact block cannot impact the passive impact block to rotate. The rolling balls are squeezed and move backward along the ball track, driving the active impact cylinder to move backward. The active impact block and the passive impact block separate and do not contact each other. After the active impact block rotates with the active impact cylinder and passes around the passive impact block, the active impact cylinder moves forward to reset under the action of the return spring. The rolling balls are driven forward by the active impact cylinder and return to the front end of the V-shaped ball track. The active impact block can continue to rotate and impact the passive impact block.

Claims

1. An electric log wedge, characterized in that, It includes a main logging wedge (1) and a secondary logging wedge (2). The bottom of the main logging wedge (1) is provided with a notch (3) for accommodating the secondary logging wedge (2). The rear side of the main logging wedge (1) is provided with a driving mechanism for driving the secondary logging wedge (2) to extend forward / retract into the notch (3). The top surface of the main logging wedge (1) and the bottom surface of the secondary logging wedge (2) are both provided with a check structure (4).

2. The electric log-wedge according to claim 1, characterized in that The main logging wedge (1) includes a main wedge body and a connector (5). The connector (5) is located on the rear side of the main wedge body. The driving mechanism is fixedly connected to the connector (5). The top surface of the main wedge body is a first inclined surface that slopes upward from front to back. The bottom surface of the main wedge body is a second inclined surface (55) that slopes downward from front to back. The notch (3) is located on the second inclined surface (55).

3. The electric log-wedge according to claim 2, characterized in that The front end of the first inclined surface is connected to the front end of the second inclined surface (55), and the bottom surface of the sub-logging wedge (2) is a third inclined surface that slopes downward from front to back.

4. The electric log-wedge according to claim 3, characterized in that When the sub-logging wedge (2) retracts into the notch (3), the longitudinal section of the whole formed by the main wedge and the sub-logging wedge (2) is an isosceles triangle, and the base of the isosceles triangle is vertical; the longitudinal section of the sub-logging wedge (2) is a right triangle, the hypotenuse of the right triangle is located on the third inclined plane, the long right-angled side of the right triangle is horizontal, and the short right-angled side of the right triangle is vertical.

5. The electric log-wedge according to claim 3, characterized in that The main wedge includes a first wedge block (6) and plates (7) symmetrically arranged on the left and right sides of the first wedge block (6). The first wedge block (6) has a first connecting notch (8) on its rear side. The first connecting notch (8) has a first connecting block (9) that matches the first connecting notch (8). The first wedge block (6) is detachably connected to the plate (7). The first connecting block (9) is detachably connected to the plate (7). The first wedge block (6) is detachably connected to the first connecting block (9). The connector (5) is fixedly connected to the rear side of the first connecting block (9).

6. The electric log-wedge according to claim 5, characterized in that The sub-logging wedge (2) includes a second wedge (10), a second connecting notch (11) is provided on the rear side of the second wedge (10), a second connecting block (12) matching the second connecting notch (11) is provided in the second connecting notch (11), and the second wedge (10) and the second connecting block (12) are detachably connected.

7. The electric log-wedge according to claim 6, characterized in that The first connecting notch (8) has a first limiting notch (13) on its front side, the first connecting block (9) has a first limiting block (14) that matches the first limiting notch (13) on its front side, the upper surface of the first connecting block (9) has a plurality of second limiting notches (15), the top of the first connecting notch (8) has a second limiting block (16) that matches the second limiting notch (15) at the position corresponding to the second limiting notch (15) on its top, the second connecting notch (11) has a third limiting notch (17) on its front side, the second connecting block (12) has a third limiting block (18) that matches the third limiting notch (17) on its front side, the lower surface of the second connecting block (12) has a plurality of fourth limiting notches (19), and the bottom of the second connecting notch (11) has a fourth limiting block (20) that matches the fourth limiting notch (19) at the position corresponding to the fourth limiting notch (19) on its bottom.

8. The electric log-wedge according to claim 6, characterized in that The connector (5) is provided with a through hole (21), which is connected to the notch (3). The driving mechanism includes a lead screw (22), a lead screw nut (23), and a driving module (24). The driving module (24) is fixedly connected to the connector (5). The lead screw (22) passes through the through hole (21) and extends into the notch (3). The lead screw nut (23) is sleeved on the lead screw (22) and fixedly connected to the log wedge (2). The driving module (24) is used to drive the lead screw (22) to rotate. The plate (7) is provided with a strip-shaped guide hole (25) arranged along the front and back direction. The strip-shaped guide hole (25) is connected to the notch (3). The second connecting block (12) is symmetrically provided with guide posts (26) on the left and right sides. The guide post (26) passes through the strip-shaped guide hole (25) on the corresponding side and can slide back and forth along the strip-shaped guide hole (25).

9. The electric log-wedge according to claim 6, characterized in that The bottom surface of the first connecting block (9) is provided with a guide groove (29) arranged along the front and back direction, and the top surface of the second connecting block (12) is provided with a guide block (30) that matches the guide groove (29). The guide block (30) is located in the guide groove (29) and can slide back and forth along the guide groove (29). The front side of the guide groove (29) is provided with a first limiting surface (31) that is inclined backward, and the front side of the guide block (30) is provided with a second limiting surface (32) that matches the first limiting surface (31).

10. The electric logging wedge according to claim 1, characterized in that, The anti-return structure (4) includes a plurality of protrusions (34) arranged side by side from front to back. The protrusions (34) are arranged in a left-right direction. The longitudinal section of the protrusions (34) is triangular. The top surface of the protrusions (34) is inclined from front to back towards the side away from the main logging wedge (1).

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