阅读说明：本技术 一种半自动伐木装置 (Semi-automatic felling device ) 是由 张津瑜 于 2019-10-31 设计创作，主要内容包括：本发明公开了一种半自动伐木装置,其结构包括机箱,机箱内设有主动力系统,主动力系统中间设有链锯,主动力系统上端连接有转动机构,转动机构下端与链锯可转动连接,转动机构在主动力系统提供的动力下能够推动链锯转动,机箱内另一侧设有副传动系统,副传动系统内部设有离合机构,离合机构的控制部分设于机箱后的把手上,副传动系统上端设有弹力带,机箱外端设有固定机构,本发明的有益效果：本发明可以控制链锯旋转,完成切割动作,同时弹力带可以将本半自动伐木装置稳定地固定在树木一侧,操作简单,能够有效地提高工作效率。(The invention discloses a semi-automatic felling device which structurally comprises a case, wherein a main power system is arranged in the case, a chain saw is arranged in the middle of the main power system, a rotating mechanism is connected to the upper end of the main power system, the lower end of the rotating mechanism is rotatably connected with the chain saw, the rotating mechanism can push the chain saw to rotate under the power provided by the main power system, an auxiliary transmission system is arranged on the other side in the case, a clutch mechanism is arranged in the auxiliary transmission system, a control part of the clutch mechanism is arranged on a handle behind the case, an elastic belt is arranged at the upper end of the auxiliary transmission system, and a fixing mechanism is arranged at the outer end of the case: the semi-automatic felling device can control the chain saw to rotate to complete cutting action, and meanwhile, the semi-automatic felling device can be stably fixed on one side of a tree through the elastic band, so that the operation is simple, and the working efficiency can be effectively improved.)

1. The utility model provides a semi-automatic felling device, includes quick-witted case (10), quick-witted case (10) rear side is equipped with handle (11), its characterized in that: the lower end of the case (10) is a hollow lower cavity (12), the upper end of the lower cavity (12) is a partition layer (13), the upper end of the case (10) is a hollow upper cavity (14), the partition layer (13) is arranged between the upper cavity (14) and the lower cavity (12), the handle (11) is provided with a hollow pipeline (15), the pipeline (15) extends to the lower cavity (12), the lower cavity (12) is provided with a main power system (20), the main power system (20) extends out of the lower cavity (12) and extends into the upper cavity (14), the main power system (20) is positioned at the partition layer (13) and is provided with a chain saw (40), the top end of the main power system (20) is connected with a rotating mechanism (50), the upper end of the rotating mechanism (50) extends out of the upper cavity (14), and the rotating mechanism (50) can push the chain saw (40) to rotate under the power provided by the main power system (20), the right side of the lower cavity (12) is provided with an auxiliary transmission system (30), a clutch mechanism (90) is arranged inside the auxiliary transmission system (30), the other end of the clutch mechanism (90) is arranged in the pipeline (15), the upper end of the auxiliary transmission system (30) is connected with an elastic belt (60), one end of the elastic belt (60) is fixedly connected with the upper end of the auxiliary transmission system (30) and partially wound on the upper end of the auxiliary transmission system (30), the other end of the elastic belt (60) extends out of the lower cavity (12), the other end of the elastic belt (60) is provided with a cylindrical clamping block (61), the left side of the outer end of the case (10) is provided with a cylindrical clamping groove (62), the front end of the clamping groove (62) is provided with an opening, the clamping block (61) can be freely fixed in the clamping groove (62), the middle of the auxiliary transmission system (30) is provided with, one end of the ratchet mechanism (70) is provided with a fixing mechanism (80), the fixing mechanism (80) is fixed at the outer end of the case (10), and the fixing mechanism (80) can enable the ratchet mechanism (70) to be locked under the stress condition.

2. A semi-automatic felling device according to claim 1 characterized in that: the driving power system (20) comprises an engine (21), the engine (21) is arranged at the lower end of the lower cavity (12), a first driving shaft (22) is arranged at the upper end of the engine (21), a first bevel gear (23) is arranged at the upper end of the first driving shaft (22), a second bevel gear (24) is arranged at the right end of the first bevel gear (23), a short rod (25) is connected inside the second bevel gear (24), the short rod (25) extends out of the lower cavity (12), the short rod (25) is movably connected with the lower cavity (12) through a fourth bearing (103), a first round ball (26) is arranged at the front end of the short rod (25), a third bevel gear (27) is arranged at the left end of the second bevel gear (24), a first transmission shaft (28) is connected inside the third bevel gear (27), and the first transmission shaft (28) extends out of the lower cavity (12) and into the upper cavity (, the chain saw (40) is arranged on the portion, located on the interlayer (13), of the first transmission shaft (28), the first gear (29) is arranged at the upper end of the first transmission shaft (28), the first transmission shaft (28) is rotatably connected with the lower cavity (12) through a first bearing (100), and the first transmission shaft (28) is rotatably connected with the upper cavity (14) through a second bearing (101).

3. A semi-automatic felling device according to claim 2 characterized in that: the chain saw (40) comprises a first driving gear (41), the first transmission shaft (28) is connected in the first driving gear (41), a driven gear (42) is arranged at the other end of the chain saw (40), the driven gear (42) is connected with the first driving gear (41) through a saw chain (43), an upper cover (44) is arranged at the upper end of the saw chain (43), and a lower cover (45) is arranged at the lower end of the saw chain (43).

4. A semi-automatic felling device according to claim 3 characterized in that: slewing mechanism (50) include gear two (51), gear two (51) can with gear one (29) meshing, gear two (51) internal connection has transmission shaft two (52), upper chamber (14) upper end is equipped with circular arc opening (55), circular arc opening (55) both ends are equipped with the spout, transmission shaft two (52) upper end is passed through circular arc opening (55) stretch out upper chamber (14), transmission shaft two (52) top is equipped with ball two (54), upper cover (44) up end is equipped with cylinder opening (46), transmission shaft two (52) lower extreme stretches out upper chamber (14) and passes cylinder opening (46), transmission shaft two (52) through bearing three (102) with cylinder opening (46) rotatable coupling.

5. A semi-automatic felling device according to claim 1 characterized in that: the auxiliary transmission system (30) comprises an electric drive motor (31), the motor (31) is arranged at the lower end of the lower cavity (12), the upper end of the motor (31) is connected with a second driving shaft (32), the upper end of the second driving shaft (32) is provided with a third gear (33), a gear four (34) is arranged on the right side of the gear three (33), a space is reserved between the gear three (33) and the gear four (34), a third transmission shaft (35) is connected in the fourth gear (34), the ratchet mechanism (70) is arranged in the middle of the third transmission shaft (35), the upper end of the transmission shaft III (35) is rotatably connected with the case (10) through a nut I (37), the top end of the third transmission shaft (35) is connected with a rotating wheel (36), the outer end of the rotating wheel (36) is fixed with the elastic band (60), and part of the elastic band (60) is wound on the rotating wheel (36).

6. A semi-automatic felling device according to claim 5 characterized in that: ratchet (70) includes shell (71), shell (71) pass through bearing and third (35) rotatable coupling of transmission shaft, the inside inner chamber (72) that is equipped with of shell (71), be equipped with ratchet (73) in the middle of inner chamber (72), ratchet (73) internal connection has third (35) of transmission shaft, inner chamber (72) lower extreme is equipped with pawl (74), pawl (74) lower extreme passes through bolt (75) and shell (71) rotatable coupling, pawl (74) middle downside is equipped with spring (76), the spring (76) other end is fixed in shell (71), pawl (74) lower extreme left side is equipped with slider (77), slider (77) lower extreme is equipped with baffle (78), baffle (78) lower extreme is connected with fixed establishment (80).

7. A semi-automatic felling device according to claim 6 characterized in that: right side fixed establishment (80) includes connecting rod one (81), connecting rod (81) one end is equipped with baffle (78), the connecting rod (81) other end is equipped with mount (82), mount (82) rear end is equipped with a plurality of evenly distributed's spring two (83), spring two (83) other end is located quick-witted case (10) outer end, left side fixed establishment (80) is including mount (82), mount (82) rear end is equipped with a plurality of evenly distributed's spring two (83), the spring two (83) other end is located quick-witted case (10) outer end.

8. A semi-automatic felling device according to claim 5 characterized in that: clutch mechanism (90) is including button (91), button (91) lower extreme is equipped with stock (92), stock (92) lower extreme is connected with clutch gear (93), clutch gear (93) through nut two (94 a) with stock (92) rotatable coupling, clutch gear (93) are located gear three (33) with in the middle of gear four (34), clutch gear (93) can with gear three (33) with gear four (34) accomplish the meshing action simultaneously, button (91) lower extreme with be equipped with spring three (94) between pipeline (15) inner wall, the inside battery (95) that is equipped with of handle (11) lower extreme, battery (95) one end is equipped with conducting strip one (96), pipeline (15) inner wall is equipped with conducting strip one (97), conducting strip one (96) other end stretches into in pipeline (15) and is connected with conducting strip one (97), button (91) lower extreme is equipped with conducting strip two (98), conducting strip two (98) are located conducting strip one (97) top, conducting strip one (97) left side is equipped with conducting strip three (99), conducting strip two (98) are located conducting strip three (99) top, work as button (91) are in when receiving external force to push down the state, conducting strip two (98) with conducting strip one (97) with conducting strip three (99) are in the contact state, work as button (91) are in when not receiving external force state, conducting strip two (98) with conducting strip one (97) with conducting strip three (99) are in the separation state, conducting strip three (99) other end is equipped with wire two (96 a), wire two (96 a) other end is connected to motor (31).

Technical Field

The invention belongs to the field of hardware, relates to a felling device, and particularly relates to a semi-automatic felling device.

Background

The chain saw mainly cuts trees by the shearing action of the transverse movement of the staggered blades on the saw chain. Traditional chain saw is at the during operation, needs operating personnel to rely on the manpower to go to balance the vibrations and the moment of torsion that the chain saw produced at the during operation, and need stoop and carry out the operation, and operating personnel's field of vision shortens under this kind of condition, and when the control tree falls the direction and misses, can't avoid danger rapidly, makes operation security greatly reduced. For this reason, long-term research has been conducted, and various solutions have been proposed.

For example, chinese patent literature discloses an electric chain saw [ application No.: CN201721658155.X ], including chain saw body, carriage, lifter plate, especially, still include the frame lower extreme and install the universal wheel, install the lift screw post through the screw thread in the frame, the lower extreme welding of lifter plate has the rotary rod, and the rotor plate is installed through the damping pivot in the lifter plate upper end, and the rotor plate upper end is equipped with the connecting block. The chain saw body is supported by the movable frame, the labor intensity of operators is reduced, the lifting threaded column is rotated to drive the lifting plate to lift, the overall height of the chain saw is adjusted, and different height requirements are met.

Above-mentioned scheme needs rely on the stability of manpower control chain saw body, and the frame removes and is not applicable to the complicated woodland of topography, needs operating personnel control chain saw body lateral shifting to carry out the operation simultaneously.

Disclosure of Invention

The semi-automatic felling device can be fixed at a part of a tree to be cut, can support the weight of a chain saw body and can be stably fixed at one side of the tree, and meanwhile, the transverse cutting action of the chain saw can be completed by a machine, so that the working efficiency is improved.

In order to achieve the purpose, the invention adopts the following technical scheme: this semi-automatic felling device includes quick-witted case, quick-witted case rear side is equipped with handle, its characterized in that: the lower end of the case is a hollow lower cavity, the upper end of the lower cavity is an interlayer, the upper end of the case is a hollow upper cavity, an interlayer is arranged between the upper cavity and the lower cavity, the handle is provided with a hollow pipeline, the pipeline extends to the lower cavity, the lower cavity is provided with a main power system, the main power system extends out of the lower cavity and extends into the upper cavity, the main power system is provided with a chain saw at the interlayer part, the top end of the main power system is connected with a rotating mechanism, the upper end of the rotating mechanism extends out of the upper cavity, the rotating mechanism can push the chain saw to rotate under the power provided by the main power system, the right side of the lower cavity is provided with an auxiliary transmission system, a clutch mechanism is arranged inside the auxiliary transmission system, the other end of the clutch mechanism is arranged in the pipeline, and the upper end of the auxiliary transmission system is connected with an, one end of the elastic belt is fixedly connected with the upper end of the auxiliary transmission system, and part of the elastic belt is wound on the upper end of the auxiliary transmission system, the other end of the elastic belt extends out of the lower cavity, a cylindrical clamping block is arranged at the other end of the elastic belt, a cylindrical clamping groove is formed in the left side of the outer end of the case, an opening is formed in the front end of the clamping groove, the clamping block can be freely fixed in the clamping groove, a ratchet mechanism is arranged in the middle of the auxiliary transmission system, a fixing mechanism is arranged at one end of the ratchet mechanism and fixed at the outer end of the case, and the ratchet mechanism can be locked under the stress.

The invention creatively designs the rotating mechanism, the chain saw can be controlled to rotate to complete the cutting action, meanwhile, the semi-automatic felling device can be stably fixed on one side of a tree by the elastic band, the operation is simple, and the working efficiency can be effectively improved.

In the semi-automatic felling device, the main power system comprises an engine, the engine is arranged at the lower end of the lower cavity, the upper end of the engine is provided with a first driving shaft, the upper end of the first driving shaft is provided with a first bevel gear, the right end of the first bevel gear is provided with a second bevel gear, a short rod is connected inside the second bevel gear and extends out of the lower cavity, the short rod is movably connected with the lower cavity through a bearing IV, the front end of the short rod is provided with a first round ball, the left end of the second bevel gear is provided with a third bevel gear, the third bevel gear is internally connected with a first transmission shaft, the first transmission shaft extends out of the lower cavity and into the upper cavity, a chain saw is arranged at the position of the first transmission shaft, which is positioned on the interlayer, the upper end of the first transmission shaft is provided with a first gear, the first transmission shaft is rotatably connected with the lower cavity through a first bearing, and the first transmission shaft is rotatably connected with the upper cavity through a second bearing.

In the semi-automatic felling device, the chain saw comprises a first driving gear, the first driving gear is connected with the first transmission shaft, a driven gear is arranged at the other end of the chain saw and is connected with the first driving gear through a saw chain, an upper cover is arranged at the upper end of the saw chain, and a lower cover is arranged at the lower end of the saw chain.

At foretell semi-automatic felling device, slewing mechanism includes gear two, gear two can with gear one meshes, two internal connections of gear have transmission shaft two, the upper chamber upper end is equipped with the circular arc opening, circular arc opening both ends are equipped with the spout, two upper ends of transmission shaft pass through the circular arc opening stretches out the upper chamber, two tops of transmission shaft are equipped with ball two, the upper cover up end is equipped with the cylinder opening, two lower extremes of transmission shaft stretch out the upper chamber passes the cylinder opening, transmission shaft two pass through bearing three with cylinder opening rotatable coupling. And when the second transmission shaft is controlled to enable the second gear to be meshed with the first gear, the chain saw can be controlled to rotate by taking the first driving gear as an original point, and the cutting action is finished.

In foretell semi-automatic felling device, auxiliary transmission system includes electric drive's motor, the cavity lower extreme is located down to the motor, the motor upper end is connected with driving shaft two, two upper ends of driving shaft are equipped with gear three, three right sides of gear are equipped with gear four, gear three with leave the space in the middle of the gear four, be equipped with in the middle of the three transmission shafts ratchet, three upper ends of transmission shafts pass through nut one with quick-witted case rotatable coupling, three tops of transmission shafts are connected with the runner, the runner outer end is fixed with the elastic webbing, the elastic webbing partially convolute in the runner.

In foretell semi-automatic lumbering device, ratchet includes the shell, the shell passes through three rotatable coupling of bearing and transmission shaft, the inside inner chamber that is equipped with of shell, be equipped with the ratchet in the middle of the inner chamber, ratchet internal connection has transmission shaft three, the inner chamber lower extreme is equipped with the pawl, the pawl lower extreme passes through bolt and shell rotatable coupling, the downside is established and is equipped with spring one in the middle of the pawl, a spring other end is fixed in the shell, pawl lower extreme left side is equipped with the slider, the slider lower extreme is equipped with the baffle, the baffle lower extreme is connected with fixed establishment.

In foretell semi-automatic lumbering device, right side fixed establishment includes connecting rod one, connecting rod one end is equipped with the baffle, the connecting rod other end is equipped with the mount, the mount rear end is equipped with a plurality of evenly distributed's spring two, the two other ends of spring are located quick-witted case outer end, left side fixed establishment includes the mount, the mount rear end is equipped with a plurality of evenly distributed's spring two, the two other ends of spring are located quick-witted case outer end. The fixing frame moves towards the inside of the case after being stressed, the connecting rod pushes the sliding block to extrude, and the sliding block pushes the pawl to rotate clockwise by taking the bolt as an original point until the pawl is clamped into the ratchet.

In the semi-automatic felling device, the clutch mechanism comprises a button, a long rod is arranged at the lower end of the button, a clutch gear is connected at the lower end of the long rod and is rotatably connected with the long rod through a nut II, the clutch gear is positioned between the gear III and the gear IV and can simultaneously complete meshing action with the gear III and the gear IV, a spring III is arranged between the lower end of the button and the inner wall of the pipeline, a battery is arranged in the lower end of the handle, a first conducting strip is arranged at one end of the battery, a first conducting strip is arranged on the inner wall of the pipeline, the other end of the first conducting strip extends into the pipeline and is connected with the first conducting strip, a second conducting strip is arranged at the lower end of the button and is arranged above the first conducting strip, three conducting strips are arranged on the left side of the first conducting strip, and the, when the button is in a state of being pressed by external force, the second conducting plate is in a contact state with the first conducting plate and the third conducting plate, when the button is in a state of not being pressed by the external force, the second conducting plate is in a separation state with the first conducting plate and the third conducting plate, the other end of the third conducting plate is provided with a second wire, and the other end of the second wire is connected to the motor. The clutch mechanism is controlled to enable the clutch gear, the gear three and the gear four to simultaneously complete meshing action, meanwhile, the circuit one and the circuit two are connected, and the motor is electrified to start to output power. The button can be pressed to drive the auxiliary transmission system to operate, the auxiliary transmission system pulls the elastic band back to the case, and the semi-automatic felling device is stably fixed on one side of the tree by means of the elastic band and the fixing mechanism.

Compared with the prior art, the invention has the advantages that:

1. the rotating mechanism can control the chain saw to rotate within a certain angle by taking the first driving gear as an origin, so that the transverse cutting action of the traditional chain saw is replaced, and the workload of operators is reduced.

2. The bevel gear II can be clutched by the short rod, so that the chain saw is safer to use.

3. The ratchet mechanism and the fixing mechanism are matched for use, so that the pulling-out and retracting operations of the elastic band can be simpler and more convenient.

Drawings

Fig. 1 is a schematic partial cross-sectional view of a semi-automatic felling device provided by the present invention.

FIG. 2 is a schematic diagram of the position relationship between the auxiliary transmission system and the clutch mechanism of the semi-automatic felling device provided by the invention.

Fig. 3 is a top view of the semi-automatic felling device provided by the present invention.

FIG. 4 is a semi-sectional view of the ratchet mechanism of the semi-automatic felling device provided by the present invention.

FIG. 5 is a schematic view of the engagement state of the joint between the rotating mechanism of the semi-automatic felling device and the main power system provided by the invention.

In the figure, 10, a chassis; 11. a handle; 12. a lower cavity; 13 an interlayer; 14. an upper cavity; 15. a pipeline; 20. a main power system; 21. an engine; 22. a first driving shaft; 23. a first bevel gear; 24. a second bevel gear; 25 short rods; 26. a first sphere; 27. a third bevel gear; 28. a first transmission shaft; 29. a first gear; 30. a secondary driveline; 31. a motor; 32. a second driving shaft; 33. a third gear; 34. a fourth gear; 35. a third transmission shaft; 36. a rotating wheel; 37. a first nut; 40. a chain saw; 41. a first driving gear; 42. a driven gear; 43. a saw chain; 44. an upper cover; 45. a lower cover; 46. a cylindrical opening; 50. a rotating mechanism; 51. a second gear; 52. a second transmission shaft; 54. a second sphere; 55. an arc opening; 60. an elastic band; 61. a clamping block; 62. a card slot; 70. a ratchet mechanism; 71. a housing; 72. an inner cavity; 73. a ratchet; 74. a pawl; 75. a bolt; 76. a first spring; 77. a slider; 78. a stopper; 80. a fixing mechanism; 81. a first connecting rod; 82. a fixed mount; 83. a second spring; 90. a clutch mechanism; 91. a button; 92. a long rod; 93. a clutch gear; 93a and a second nut; 94. a third spring; 95. a battery case; 96. a first circuit; 96a, a circuit two; 97. a first conducting plate; 98. a second conducting plate; 99. conducting plate III; 100. a first bearing; 101. a second bearing; 102. a third bearing; 103. a bearing IV; A. the tree is to be cut.

Detailed Description

As shown in fig. 1, fig. 2 and fig. 3, the semi-automatic felling device of the present invention includes a case 10, a handle 11 is provided at the rear side of the case 10, and the device is characterized in that: the lower end of the case 10 is a hollow lower cavity 12, the upper end of the lower cavity 12 is a separation layer 13, the upper end of the case 10 is a hollow upper cavity 14, the separation layer 13 is arranged between the upper cavity 14 and the lower cavity 12, the handle 11 is provided with a hollow pipeline 15, the pipeline 15 extends to the lower cavity 12, the lower cavity 12 is provided with a main power system 20, the main power system 20 extends out of the lower cavity 12 and extends into the upper cavity 14, the main power system 20 is provided with a chain saw 40 at the separation layer 13, the top end of the main power system 20 is connected with a rotating mechanism 50, the upper end of the rotating mechanism 50 extends out of the upper cavity 14, the rotating mechanism 50 can push the chain saw 40 to rotate under the power provided by the main power system 20, the right side of the lower cavity 12 is provided with an auxiliary transmission system 30, a clutch mechanism 90 is arranged inside the auxiliary transmission system 30, the other end of the clutch mechanism 90 is arranged in the pipeline 15, the upper end of the auxiliary transmission system 30 is connected with an elastic belt 60, the other end of the elastic belt 60 extends out of the lower cavity 12, a cylindrical clamping block 61 is arranged at the other end of the elastic belt 60, a cylindrical clamping groove 62 is arranged on the left side of the outer end of the case 10, an opening is formed in the front end of the clamping groove 62, the clamping block 61 can be freely fixed in the clamping groove 62, a ratchet mechanism 70 is arranged in the middle of the auxiliary transmission system 30, a fixing mechanism 80 is arranged at one end of the ratchet mechanism 70, the fixing mechanism 80 is fixed at the outer end of the case 10, and the ratchet mechanism 70 can be locked under the.

As shown in fig. 1, the main power system 20 includes an engine 21, the engine 21 is disposed at the lower end of the lower cavity 12, a first driving shaft 22 is disposed at the upper end of the engine 21, a first bevel gear 23 is disposed at the upper end of the first driving shaft 22, a second bevel gear 24 is disposed at the right end of the first bevel gear 23, a short rod 25 is connected inside the second bevel gear 24, the short rod 25 extends out of the lower cavity 12, the short rod 25 is movably connected with the lower cavity 12 through a fourth bearing 103, a first round ball 26 is disposed at the front end of the short rod 25, a third bevel gear 27 is disposed at the left end of the second bevel gear 24, a first transmission shaft 28 is connected inside the third bevel gear 27, the first transmission shaft 28 extends out of the lower cavity 12 and extends into the upper cavity 14, a chain saw 40 is disposed at a position of the partition 13, a first gear 29 is disposed at the upper end of the.

As shown in fig. 1 and 2, the sub-transmission system 30 includes an electrically driven motor 31, the motor 31 is disposed at the lower end of the lower cavity 12, a second driving shaft 32 is connected to the upper end of the motor 31, a third gear 33 is disposed at the upper end of the second driving shaft 32, the third gear 33 is screwed with the second driving shaft 32, a fourth gear 34 is disposed at the right side of the third gear 33, a space is reserved between the third gear 33 and the fourth gear 34, a third transmission shaft 35 is connected to the fourth gear 34, the fourth gear 34 is screwed with the third transmission shaft 35, a ratchet mechanism 70 is disposed in the middle of the third transmission shaft 35, the upper end of the third transmission shaft 35 is rotatably connected to the chassis 10 through a first nut 37, a rotating wheel 36 is connected to the top end of the third transmission shaft 35, the rotating wheel 36 is screwed with the third transmission shaft 35.

As shown in fig. 1 and 3, the chain saw 40 includes a driving gear 41, a transmission shaft 28 is connected to the driving gear 41, the driving gear 41 is screwed with the transmission shaft 28, a driven gear 42 is provided at the other end of the chain saw 40, the driven gear 42 is connected to the driving gear 41 through a saw chain 43, an upper cover 44 is provided at the upper end of the saw chain 43, and a lower cover is provided at the lower end of the saw chain 43.

The rotating mechanism 50 comprises a second gear 51, the second gear 51 can be meshed with the first gear 29, a second transmission shaft 52 is connected inside the second gear 51, an arc opening 55 is formed in the upper end of the upper cavity 14, sliding grooves are formed in two ends of the arc opening 55, the upper end of the second transmission shaft 52 extends out of the upper cavity 14 through the arc opening 55, a second round ball 54 is arranged at the top end of the second transmission shaft 52, a cylindrical opening 46 is formed in the upper end face of the upper cover 44, the lower end of the second transmission shaft 52 extends out of the upper cavity 14 and penetrates through the cylindrical opening 46, and the second transmission shaft 52 is rotatably connected with the cylindrical opening 46. And when the second transmission shaft is controlled to enable the second gear to be meshed with the first gear, the chain saw can be controlled to rotate by taking the first driving gear as an original point, and the cutting action is finished.

As shown in fig. 1 and 4, the ratchet mechanism 70 includes a housing 71, the housing 71 is rotatably connected to a third transmission shaft 35 through a bearing, an inner cavity 72 is provided inside the housing 71, a ratchet 73 is provided in the middle of the inner cavity 72, the third transmission shaft 35 is connected to the inside of the ratchet 73, the ratchet 73 is screwed to the third transmission shaft 35, a pawl 74 is provided at the lower end of the inner cavity 72, the lower end of the pawl 74 is rotatably connected to the housing 71 through a bolt 75, a first spring 76 is provided at the lower side of the middle of the pawl 74, the other end of the first spring 76 is fixed to the housing 71, a slider 77 is provided at the left side of the lower end of the pawl.

As shown in fig. 1 and 3, the right fixing mechanism 80 includes a first connecting rod 81, a baffle 78 is disposed at one end of the first connecting rod 81, a fixing frame 82 is disposed at the other end of the first connecting rod 81, a plurality of uniformly distributed second springs 83 are disposed at the rear end of the fixing frame 82, the other ends of the second springs 83 are disposed at the outer end of the case 10, the left fixing mechanism 80 includes the fixing frame 82, a plurality of uniformly distributed second springs 83 are disposed at the rear end of the fixing frame 82, and the other ends of the second springs 83 are disposed. When the fixed frame 82 is forced to move toward the inside of the chassis 10, the connecting rod 81 pushes the sliding block 77, and the sliding block 77 pushes the pawl 74 to rotate clockwise with the bolt 75 as the origin until the pawl 74 is caught in the ratchet 73.

The clutch mechanism 90 comprises a button 91, a long rod 92 is arranged at the lower end of the button 91, a clutch gear 93 is connected to the lower end of the long rod 92, the clutch gear 93 is rotatably connected with the long rod 92 through a second nut 94a, the clutch gear 93 is positioned between a third gear 33 and a fourth gear 34, the clutch gear 93 can be meshed with the third gear 33 and the fourth gear 34 simultaneously, a third spring 94 is arranged between the lower end of the button 91 and the inner wall of the pipeline 15, a battery 95 is arranged inside the lower end of the handle 11, a first conducting wire 96 is arranged at one end of the battery 95, a first conducting strip 97 is arranged on the inner wall of the pipeline 15, the other end of the first conducting wire 96 extends into the pipeline 15 and is connected with the first conducting strip 97, a second conducting strip 98 is arranged at the lower end of the button 91, the second conducting strip 98 is arranged above the first conducting strip 97, a third, when the button 91 is pressed by an external force, the second conducting strip 98 is in a contact state with the first conducting strip 97 and the third conducting strip 99, when the button 91 is not pressed by the external force, the second conducting strip 98 is separated from the first conducting strip 97 and the third conducting strip 99, the other end of the third conducting strip 99 is provided with a second lead 96a, and the other end of the second lead 96a is connected to the motor 31. When the button 91 is pressed, the auxiliary transmission system 30 can be driven to operate, the elastic band 60 is pulled back to the case 10 by the auxiliary transmission system 30, and the semi-automatic felling device is stably fixed on one side of a tree by means of the elastic band 60 and the fixing mechanism 80.

The specific operation mode of the specific embodiment of the invention is as follows: the semi-automatic felling device is lifted by grasping the handle 11, the fixing device 80 is close to the tree to be cut, the fixture block 61 is grasped, the elastic band 60 is pulled out by pulling the fixture block 61, the elastic band 60 surrounds half circle of the tree to be cut, the fixture block 61 is clamped into the fixture groove 62, then the fixing device 80 is tightly close to the tree to be cut, the fixing device 80 is forced to move towards the interior of the case 10, the first connecting rod 81 on the fixing device 80 pushes the slide block 77 on the baffle plate 78 to move towards the interior of the ratchet mechanism 70, the front end of the slide block 77 pushes the pawl 74 to rotate clockwise, the pawl 74 rotates clockwise until being clamped into the ratchet 73, then the button 91 is pressed, the clutch gear 93 at one end of the long rod 92 is simultaneously meshed with the third gear 33 and the fourth gear 34, the second conducting strip 98 at the other end of the long rod 92 contacts the first conducting strip 97 and the third conducting strip 99, the first circuit 96 and the second circuit 96, after the motor 31 starts to operate, the second driving shaft 32 is driven to rotate, the second driving shaft 32 drives the third gear 33 to rotate, the third gear 33 transmits power to the fourth gear 34 through the clutch gear 93, the fourth gear 34 drives the third transmission shaft 35 to rotate, the transmission shaft 35 drives the rotating wheel 36 to rotate, the rotating wheel 36 rotates to withdraw the elastic belt 60, the elastic belt 60 is tightened, the semi-automatic felling device is stably fixed on one side of a tree to be cut under the action of the elastic belt 60 and the fixing device 80, the button 91 is loosened after the device is fastened, the motor 31 stops operating, the pawl 74 clamps the ratchet 73, the third transmission shaft 35 cannot rotate to cause the elastic belt 60 to loosen, then after the second transmission shaft 52 is determined to be positioned at the right outer diameter of the circular arc opening 55, the engine 21 is started, the engine 21 drives the first driving shaft 22 to rotate, the first driving shaft 22 drives the first bevel gear 23 to rotate, at the moment, the bevel gear II 24 at the front end of the short rod 25 is meshed with the bevel gear I23 and the bevel gear III 27 at the same time, the power of the bevel gear I23 is transmitted to the bevel gear III 27, the bevel gear III 27 drives the transmission shaft I28 to rotate, the transmission shaft I28 drives the driving gear I41 to rotate, the driving gear I41 drives the driven gear 42 to rotate through the saw chain 43, at the moment, the chain saw is started, the transmission shaft I28 drives the gear II 51 to rotate, then the round ball II 54 is pushed, the transmission shaft II 52 moves from the outer diameter to the inner diameter of the circular-arc opening 55 along the sliding groove, the gear II 51 is meshed with the gear I29, then the transmission shaft II 52 is continuously exerted with tiny force, the transmission shaft II 52 is positioned at the inner diameter of the circular-arc opening 55, the transmission shaft II 52 rotates around the transmission shaft I28 under the action of the gear I29, the transmission shaft II 52 drives the chain saw, the second transmission shaft 52 can be loosened, the second transmission shaft 52 can move to the outer diameter from the inner diameter of the arc opening 55 along the sliding groove, the second gear 51 is disengaged from the first gear 29, the chain saw 40 stops rotating around the first transmission shaft 28, tree cutting is completed, the first ball 26 can be dragged to move outwards, the second bevel gear 24 is disengaged from the engagement state, the saw chain 43 on the chain saw 40 stops moving, the clamping block 61 is pulled out of the clamping groove 62, and the semi-automatic felling device can be disengaged from a tree. This semi-automatic felling device can tighten up elastic band 60 through pressing button 91, make this device fastening on waiting to cut trees, elastic band 60 can be fixed under this tightening state under ratchet 70's cooperation, press button 91 under the state that fixed establishment 80 is not atress also can make elastic band 60 withdraw fast, this fixed mode easy operation is convenient, the controllable clutching state of quarter butt 25 also can make the use of chain saw 40 safer in addition, slewing mechanism 50 can make chain saw 40 break away from the rotation state after rotatory certain angle around transmission shaft 28 by oneself, replaced the horizontal cutting action of artificial promotion transmission chain saw, and the labor intensity is reduced, and the work efficiency is improved.

The specific embodiments described herein are merely illustrative of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Although the terms diaphragm, circular arc opening, clutch gear, dog, slot, pipe, etc. are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention and they are to be interpreted as any additional limitation which is not in accordance with the spirit of the present invention.