A chainsaw

Abstract

This invention relates to a chainsaw, comprising a body and a chain plate mounted on the body. The body has a positioning block, and the chain plate has a first mating groove for the positioning block to pass through. The positioning block has an installation groove. A first lead screw is rotatably connected to the body, extending into the installation groove. The body has a first control mechanism. A first pressure block is slidably connected within the installation groove, threaded onto the first lead screw. First inclined surfaces are formed on opposite sidewalls of the positioning block, and first sliding grooves are formed on opposite sidewalls of the first pressure blocks. Second pressure blocks are slidably connected within each of the two first sliding grooves, with the ends of the two second pressure blocks extending away from each other and abutting against adjacent first inclined surfaces. This invention uses a pressure-retaining structure to replace the traditional bolt structure, achieving rapid installation and disassembly of the chain plate through mechanical linkage, avoiding the loss of connecting components.

Description

Technical Field

[0001] This invention relates to the field of cutting equipment, and in particular to a chainsaw. Background Technology

[0002] A chainsaw, also known as a chainsaw, is a handheld cutting tool powered by a gasoline engine, mainly used for logging and timber processing.

[0003] The cutting chain of a chainsaw is mounted on a chain plate and connected to the chainsaw's sprocket. Traditionally, the chain plate is bolted to the chainsaw body. After use, the chain plate needs to be removed and oiled to prevent rust and wear. Removing the chain plate requires unscrewing the bolts securing it, but these bolts are easily lost, leaving no bolts available for reinstallation. Summary of the Invention

[0004] This application provides a chainsaw with a pressure-retaining structure to replace the traditional bolt structure, and achieves rapid installation and disassembly of the chain plate through mechanical linkage, avoiding the loss of connecting parts.

[0005] The chainsaw provided in this application adopts the following technical solution:

[0006] A chainsaw includes a body and a chain plate mounted on the body. The body has a positioning block, and the chain plate has a first mating groove for the positioning block to pass through. The positioning block has an installation groove. A first lead screw is rotatably connected to the body, extending into the installation groove. The body has a first control mechanism for controlling the rotation of the first lead screw. A first pressure block is slidably connected within the installation groove, threaded onto the first lead screw. Rotation of the first lead screw controls the movement of the first pressure block. The positioning block has two opposite sidewalls with first inclined surfaces of opposite angles. The first pressure block has two opposite sidewalls with first sliding grooves, each containing a second pressure block. The ends of the two second pressure blocks extending away from each other extend from the first pressure block and abut against the adjacent first inclined surfaces. The first inclined surfaces convert the force of the first pressure block moving towards the body into a force of the second pressure block moving away from the first pressure block. Initially, the two second pressure blocks can pass through the first mating grooves.

[0007] By adopting the above technical solution, the first control mechanism controls the first lead screw to rotate forward, driving the first pressure block to move closer to the machine body. As the first pressure block moves closer to the machine body, it also moves the two second pressure blocks closer to the machine body. Guided by the two first inclined surfaces, the two second pressure blocks move away from the first pressure block, ultimately pressing the two second pressure blocks against the chain fixing plate. The two second pressure blocks then press the chain fixing plate against the machine body, completing the fixing of the chain fixing plate. When removing the chain fixing plate, the first control mechanism controls the first lead screw to rotate backward, causing the first pressure block to move away from the machine body, thus releasing the pressure of the second pressure blocks on the chain fixing plate. After the first pressure block stops moving, the two second pressure blocks can be pushed back into the two first sliding grooves, allowing them to re-adhere to the two first inclined surfaces, and the chain fixing plate can then be removed from the machine body.

[0008] Preferably, a spring is provided in the first slide groove, one end of the spring is connected to the second pressure block, and the other end of the spring is connected to the side wall of the first slide groove away from the second pressure block. When the second pressure block moves away from the first pressure block, the spring is stretched by force.

[0009] By adopting the above technical solution, during the process of the first pressing block moving away from the machine body, the two springs will drive the two second pressing blocks to move into the two first sliding grooves, so that the two second pressing blocks will automatically reset without manual reset.

[0010] Preferably, the first control mechanism includes a first bevel tooth sleeved on a first lead screw, a first rotating rod rotatably connected to the machine body, a second bevel tooth sleeved on the first rotating rod and meshing with the first bevel tooth, a first mating part provided on the first rotating rod, a control rod rotatably and slidably connected to the machine body, and a second mating part provided on the control rod for connecting the first mating part. The second mating part connects with the first mating part during the movement of the control rod, so that the rotation of the control rod can drive the first rotating rod to rotate.

[0011] By adopting the above technical solution, the chainsaw operator first pushes the control lever to connect the first mating part and the second mating part. Then, the chainsaw operator rotates the control lever to drive the first rotating rod to rotate. The rotation of the first rotating rod can drive the first lead screw to rotate through the engagement of the second bevel tooth and the first bevel tooth.

[0012] Preferably, the first mating part includes a first through hole on the end face of the first rotating rod and a second through hole on the bottom wall of the first through hole for the control rod to extend into. Both the first through hole and the second through hole are located on the movement path of the control rod. The second mating part includes two first connecting rods, two first friction blocks slidably connected to the two first connecting rods, a second inclined surface on the first friction block, and a first wedge block on the control rod. The two first connecting rods are respectively located on both sides of the control rod. The two first friction blocks are sleeved on the control rod. The first wedge block extends between the two second inclined surfaces. During the movement of the control rod into the second through hole, the first wedge block moves to fit against the two second inclined surfaces and presses the two first friction blocks against the side wall of the first through hole, thereby realizing the connection between the control rod and the first rotating rod.

[0013] By employing the above technical solution, to drive the first rotating rod to rotate, the chainsaw operator forcefully pushes the control rod into the machine body, causing it to move towards the first through hole. During the control rod's entry into the first through hole, the first wedge block moves to engage with the two second inclined surfaces, causing the two first friction blocks to move along with the control rod into the first through hole. Ultimately, the two first friction blocks move to contact the bottom wall of the first through hole. The control rod then continues to move into the second through hole, carrying the first wedge block with it. During this movement, the first wedge block presses the two first friction blocks against the side wall of the first through hole via the two second inclined surfaces. Then, rotating the control rod causes the two first friction blocks to rotate via the first wedge block. The rotation of the two first friction blocks, through friction, drives the first rotating rod to rotate, thus transmitting the power from the control rod to the first rotating rod. This structure only works when the chainsaw operator intentionally pushes the control rod to ensure close contact between the two first friction blocks and the side wall of the first through hole; only then can rotating the control rod drive the first rotating rod. Normally, when chainsaw technicians or external objects such as tree branches collide with the control rod and cause it to rotate, the control rod will only spin freely and will not affect the first rotating rod or the first lead screw, thus ensuring the stability of the second pressure block in fixing the chain plate.

[0014] Preferably, the end of the control lever away from the first rotating rod extends out of the machine body and is hinged to a T-shaped rod, and the outer wall of the machine body is provided with a buckle that engages with the T-shaped rod.

[0015] By adopting the above technical solution, a T-shaped rod is set to facilitate the rotation of the control rod. When the T-shaped rod is not in use, it can be fastened to the buckle to limit the rotation of the control rod. At the same time, it reduces the overall size of the machine body and makes it easier for chainsaw operators to cut trees with chainsaws.

[0016] Preferably, the machine body is provided with a sliding groove, an adjusting block slides in the sliding groove, the adjusting block extends out of the sliding groove, the chain plate is provided with a second mating groove for the adjusting block to pass through, a second lead screw is rotatably connected in the sliding groove, the adjusting block is threadedly connected to the second lead screw, and the machine body is provided with a second control mechanism for controlling the rotation of the second lead screw.

[0017] By adopting the above technical solution, when the chain fixing plate is installed on the machine body, the adjusting block is inserted into the second mating groove, and then the saw chain is installed on the chain fixing plate. Next, the second control mechanism controls the rotation of the second lead screw, which drives the adjusting block to slide in the sliding groove and adjust the position of the chain fixing plate, thereby adjusting the tension of the saw chain.

[0018] Preferably, the second control mechanism includes a third bevel tooth on the second lead screw, a second rotating rod rotatably connected to the machine body, a fourth bevel tooth on the second rotating rod that meshes with the third bevel tooth, a third mating part on the second rotating rod, and a fourth mating part on the control rod for connecting the third mating part. The fourth mating part connects with the third mating part during the movement of the control rod, so that the second rotating rod rotates when the control rod rotates.

[0019] By adopting the above technical solution, the third mating part can be made to cooperate with the fourth mating part by sliding the control rod, so that the second rotating rod can be driven to rotate when the control rod rotates. The rotation of the second rotating rod can drive the second lead screw to rotate through the cooperation of the third bevel tooth and the fourth bevel tooth.

[0020] Preferably, the third mating part includes a third through hole on the second rotating rod, the third through hole being directly opposite the first through hole, the control rod passing through the second rotating rod and extending out of the second rotating rod through the third through hole; the fourth mating part includes two second connecting rods, two second friction blocks slidably connected to the two second connecting rods, a third inclined surface on the second friction blocks, and a second wedge block on the control rod, the two second connecting rods being located on opposite sides of the control rod, the two second friction blocks being sleeved on the outside of the control rod, the second wedge block extending between the two third inclined surfaces, the distance between the second friction block and the first friction block being less than the distance between the first through hole and the third through hole, and when the control rod moves away from the body, the second wedge block moves to fit against the two third inclined surfaces and presses the two second friction blocks against the side wall of the third through hole.

[0021] By adopting the above technical solution, when the two first friction blocks move into the first through hole, the two second friction blocks are located outside the third through hole, and when the two second friction blocks move into the third through hole, the two first friction blocks are located outside the first through hole. To drive the first rotating rod to rotate, the chainsaw operator pulls the control rod out of the machine body. During the movement of the control rod, it carries the two second friction blocks into the third through hole and eventually abuts against the bottom wall of the third through hole. Subsequently, the control rod continues to move out of the machine body, carrying the second wedge block. During the movement of the second wedge block, it presses the two second friction blocks against the side wall of the third through hole. Then, the control rod is rotated. When the control rod rotates, it drives the two second friction blocks to rotate through the second wedge block. When the two second friction blocks rotate, they drive the second rotating rod to rotate through friction, thereby achieving control of the rotation of the second rotating rod. The above structure can complete the connection, locking, and unlocking of the control rod with the first and second rotating rods by pushing in and pulling out the control rod, thus achieving control of the movement of the first pressure block and the adjusting block.

[0022] The main technical effects of this invention are reflected in the following aspects:

[0023] 1. This invention uses a pressure-resistant structure to replace the traditional bolt structure, and achieves rapid installation and disassembly of the chain plate through mechanical linkage, avoiding the loss of connecting parts;

[0024] 2. This invention achieves the adjustment and fixation of the position of the chain plate through a simple structure;

[0025] 3. This invention can complete the connection, locking and unlocking of the control rod with the first rotating rod and the second rotating rod by pushing in and pulling out the control rod, and can realize the sliding of the first pressure block and the adjusting block with a single rod. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the chainsaw structure of this application.

[0027] Figure 2 yes Figure 1 A schematic diagram of the structure of the chainsaw components and the chain fastener.

[0028] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0029] Figure 4 hour Figure 2 Cross-sectional view of the chainsaw components and chain plate along line BB.

[0030] Figure 5 yes Figure 4 A magnified view of a section at point C.

[0031] Figure 6 yes Figure 4A magnified view of a section at point D.

[0032] Figure 7 yes Figure 4 A schematic diagram of the structure of the central control rod, the T-shaped rod, the second mating part, and the fourth mating part.

[0033] Figure 8 yes Figure 4 A structural schematic diagram of the central control rod, T-shaped rod, second mating part, and fourth mating part from another angle.

[0034] Figure 9 yes Figure 7 A magnified view of a section at point E in the middle.

[0035] Figure 10 This is a structural diagram of a chainsaw component.

[0036] Figure 11 yes Figure 10 A magnified view of a section at point F.

[0037] Reference numerals: 1. Body; 11. First lead screw; 12. T-shaped rod; 13. Buckle; 14. Sliding groove; 15. Adjusting block; 16. Second lead screw; 2. Chain plate; 21. First mating groove; 22. Second mating groove; 3. Positioning block; 31. Mounting groove; 32. First inclined surface; 4. First control mechanism; 41. First bevel gear; 42. First rotating rod; 43. Second bevel gear; 44. First mating part; 441. First through hole; 442. Second through hole; 45. Control rod; 46. Second 461. First connecting rod; 462. First friction block; 463. Second inclined surface; 464. First wedge block; 5. First pressure block; 51. First sliding groove; 52. Second pressure block; 53. Spring; 6. Second control mechanism; 61. Third bevel tooth; 62. Second rotating rod; 63. Fourth bevel tooth; 64. Third mating part; 641. Third through hole; 65. Fourth mating part; 651. Second connecting rod; 652. Second friction block; 653. Third inclined surface; 654. Second wedge block. Detailed Implementation

[0038] The present invention will be further described in detail below with reference to the accompanying drawings, so that the technical solution of this application can be more easily understood and mastered.

[0039] Reference Figures 1-3 This embodiment of a chainsaw includes a body 1 and a chain fastener 2 mounted on the body 1. A positioning block 3 is integrally formed on the body 1. First inclined surfaces 32 are formed on opposite side walls of the positioning block 3, with opposite inclination angles. A first mating groove 21 is formed on the chain fastener 2 for the positioning block 3 to pass through. When the positioning block 3 is inserted into the first mating groove 21, the chain fastener 2 can slide relative to the positioning block 3 along the Y-axis.

[0040] Reference Figures 2-5 The positioning block 3 has an installation groove 31. A first lead screw 11 is rotatably connected to the machine body 1. The rotation axis of the first lead screw 11 is parallel to the Z-axis, and the top end of the first lead screw 11 extends into the installation groove 31. A first pressure block 5 is slidably connected to the installation groove 31 along the Z-axis direction. The first pressure block 5 is threadedly connected to the first lead screw 11. The movement of the first pressure block 5 is controlled by rotating the first lead screw 11.

[0041] Reference Figures 2-5 Each of the two opposing sidewalls of the first pressure block 5 has a first sliding groove 51. A second pressure block 52 is slidably connected within each of the two first sliding grooves 51 along the X-axis. The ends of the two second pressure blocks 52 that are furthest from each other extend out of the first pressure block 5 and abut against an adjacent first inclined surface 32. The first inclined surface 32 converts the force of the first pressure block 5 moving towards the body 1 into the force of the second pressure block 52 moving away from the first pressure block 5. Initially, the two second pressure blocks 52 can pass through the first mating groove 21. A spring 53 is provided within each of the two first sliding grooves 51. One end of the spring 53 is fixedly connected to the second pressure block 52, and the other end of the spring 53 is connected to the sidewall of the first sliding groove 51 furthest from the second pressure block 52. When the second pressure block 52 moves away from the first pressure block 5, the spring 53 is stretched.

[0042] Reference Figure 2 , Figure 4 and Figure 6 The machine body 1 is provided with a first control mechanism 4 for controlling the rotation of the first lead screw 11. The first control mechanism 4 includes a first bevel tooth 41 sleeved on the bottom end of the first lead screw 11, a first rotating rod 42 rotatably connected to the machine body 1, and a second bevel tooth 43 sleeved on the first rotating rod 42 and meshing with the first bevel tooth 41. The axis of the first rotating rod 42 is parallel to the X-axis.

[0043] Reference Figure 2 , Figure 4 and Figure 6 The first control mechanism 4 further includes a first mating part 44 disposed on the first rotating rod 42, a control rod 45 rotatably and slidably connected to the machine body 1, and a second mating part 46 disposed on the control rod 45 for connecting the first mating part 44. The second mating part 46 connects with the first mating part 44 during the movement of the control rod 45, so that the rotation of the control rod 45 can drive the first rotating rod 42 to rotate. The axis of the control rod 45 coincides with the axis of the first rotating rod 42. The end of the control rod 45 away from the first rotating rod 42 extends out of the machine body 1 and is hinged to a T-shaped rod 12. The outer wall of the machine body 1 is provided with a buckle 13 that engages with the T-shaped rod 12.

[0044] Reference Figure 2 , Figure 4 and Figure 6The first mating part 44 includes a first through hole 441 opened on the end face of the first rotating rod 42 and a second through hole 442 opened on the bottom wall of the first through hole 441 for the control rod 45 to extend into. The first through hole 441 is larger than the control rod 45 and the second through hole 442. The second through hole 442 is only located on the movement path of the control rod 45, and both the first through hole 441 and the second through hole 442 are located on the movement path of the control rod 45.

[0045] Reference Figure 2 , Figure 4 , Figures 6-9 The second mating part 46 includes four first connecting rods 461, two first friction blocks 462 slidably connected to the four first connecting rods 461, two second inclined surfaces 463 formed on the first friction blocks 462, and two first wedge blocks 464 symmetrically fixed on the control rod 45. The four first connecting rods 461 are located on both sides of the control rod 45 in pairs. The two first friction blocks 462 are sleeved on the control rod 45. The two first friction blocks 462 can only enter the second through hole 442 and cannot enter the first through hole 441. Two second inclined surfaces 463 on the same first friction block 462 are symmetrically arranged, and the second inclined surfaces 463 on the two first friction blocks 462 are also symmetrically arranged with each other. Two first wedge blocks 464 extend into the two second inclined surfaces 463 on the same side respectively. During the movement of the first control rod 45 into the second through hole 442, the first wedge block 464 moves to fit with the two second inclined surfaces 463 on the same side and presses the two first friction blocks 462 against the side wall of the first through hole 441.

[0046] Reference Figure 2 , Figure 3 , Figure 6 , Figure 10 and Figure 11 The machine body 1 has a sliding groove 14, and an adjusting block 15 slides within the sliding groove 14 along the Y-axis. The adjusting block 15 extends out of the sliding groove 14. The chain plate 2 has a second mating groove 22 through which the adjusting block 15 passes. A second lead screw 16 is rotatably connected within the sliding groove 14, and the axis of the second lead screw 16 is parallel to the Y-axis. The adjusting block 15 is threaded onto the second lead screw 16. The machine body 1 is provided with a second control mechanism 6 for controlling the rotation of the second lead screw 16.

[0047] Reference Figure 2 , Figure 4 , Figure 6 , Figure 10 and Figure 11The second control mechanism 6 includes a third bevel tooth 61 sleeved on the second lead screw 16, a second rotating rod 62 rotatably connected to the machine body 1, a fourth bevel tooth 63 disposed on the second rotating rod 62 and meshing with the third bevel tooth 61, a third mating part 64 disposed on the second rotating rod 62, and a fourth mating part 65 disposed on the control rod 45 for connecting the third mating part 64. The fourth mating part 65 connects with the third mating part 64 during the movement of the control rod 45, so that when the control rod 45 rotates, it drives the second rotating rod 62 to rotate.

[0048] Reference Figure 2 , Figure 4 , Figure 6 The third mating part 64 includes a third through hole 641 formed on the second rotating rod 62, the third through hole 641 being directly opposite the first through hole 441, and the control rod 45 passing through the second rotating rod 62 and extending out of the second rotating rod 62 through the third through hole 641. The axis of the second rotating rod 62 coincides with the axis of the first rotating rod 42.

[0049] Reference Figure 2 , Figure 4 , Figures 6-8 The fourth mating part 65 includes four second connecting rods 651, two second friction blocks 652 slidably connected to the four second connecting rods 651, two third inclined surfaces 653 formed on the second friction blocks 652, and two second wedge blocks 654 symmetrically fixed to the control rod 45. The two third inclined surfaces 653 on the same second friction block 652 are symmetrically arranged, and the third inclined surfaces 653 on the two second friction blocks 652 are also symmetrically arranged relative to each other. The two second wedge blocks 654 extend into the space between the two third inclined surfaces 653 on the same side.

[0050] Reference Figure 2 , Figure 4 , Figures 6-8 The distance between the second friction block 652 and the first friction block 462 is less than the distance between the first through hole 441 and the third through hole 641. When the two first friction blocks 462 move into the first through hole 441, the two second friction blocks 652 are located outside the third through hole 641. When the control lever 45 moves away from the body 1, the second wedge block 654 moves to fit against the two third inclined surfaces 653 and presses the two second friction blocks 652 against the side wall of the third through hole 641.

[0051] Reference Figures 2-10 The specific disassembly and assembly steps of the chain saw's chain plate 2 in this application are as follows:

[0052] When installing the chain clamp 2, first place the chain clamp 2 on the machine body 1, ensuring that the positioning block 3 passes through the first mating groove 21 and the adjusting block 15 passes through the second mating groove 22. Then, install the saw chain onto the chain clamp 2. Next, the chainsaw operator releases the T-bar 12 from the latch 13 and forcefully pulls the control lever 45 out of the machine body 1. During the movement of the control lever 45 out of the machine body 1, it carries two second friction blocks 652 into the third through hole 641 and eventually abuts against the bottom wall of the third through hole 641. Subsequently, the control lever 45 continues to move out of the machine body 1, carrying two second wedge blocks 654. During the movement of the two second wedge blocks 654, they press the two second friction blocks 652 against the side wall of the third through hole 641 via four third inclined surfaces 653.

[0053] Then, the control lever 45 is rotated. When the control lever 45 rotates, it drives the two second friction blocks 652 to rotate via the second wedge block 654. The rotation of the two second friction blocks 652, through friction, drives the second rotating rod 62 to rotate. The rotation of the second rotating rod 62, through the engagement of the third bevel tooth 61 and the fourth bevel tooth 63, drives the second lead screw 16 to rotate. The rotation of the second lead screw 16 controls the sliding of the adjusting block 15. The sliding of the adjusting block 15 causes the chain fixing plate 2 to slide along the Y-axis, thereby adjusting the tension of the saw chain.

[0054] After the position of the chain clamp 2 is adjusted, the chainsaw operator pushes the control lever 45 into the machine body 1, causing the control lever 45 to move toward the first through hole 441. During the movement of the control lever 45 toward the first through hole 441, the second wedge block 654 will move out of the third through hole 641 along with the two second friction blocks 652, thus disengaging the control lever 45 from the second rotating rod 62.

[0055] As the control lever 45 enters the first through hole 441, the first wedge block 464 moves to engage with the two second inclined surfaces 463, causing the two first friction blocks 462 to move along with the control lever 45 into the first through hole 441. Eventually, the two first friction blocks 462 move to contact the bottom wall of the first through hole 441. Subsequently, the control lever 45 continues to move into the second through hole 442, carrying the two first wedge blocks 464 with it. During this movement, the two first wedge blocks 464 press the two first friction blocks 462 against the side wall of the first through hole 441 via the four second inclined surfaces 463.

[0056] Then, the control lever 45 is rotated. When the control lever 45 rotates, it drives the two first friction blocks 462 to rotate through the first wedge block 464. When the two first friction blocks 462 rotate, they drive the first rotating rod 42 to rotate through friction. When the first rotating rod 42 rotates, it drives the first lead screw 11 to rotate through the cooperation of the first bevel tooth 41 and the second bevel tooth 43. The rotation of the first lead screw 11 drives the first pressure block 5 to slide closer to the machine body 1. When the first pressure block 5 moves closer to the machine body 1, it will also move the two second pressure blocks 52 closer to the machine body 1. When the two second pressure blocks 52 move closer to the machine body 1, they will move away from the first pressure block 5 under the guidance of the two first inclined surfaces 32. When the second pressure blocks 52 move away from the first pressure block 5, the spring 53 is stretched. Finally, the first pressure block 5 presses the two second pressure blocks 52 against the chain plate 2, and the two second pressure blocks 52 press the chain plate 2 against the machine body 1, thus completing the fixation of the chain plate 2.

[0057] After the chain plate 2 is fixed, the chainsaw operator pulls the control rod 45 outward, causing the control rod 45 to move out of the first through hole 441 along with the two first friction blocks 462 and the first wedge block 464. Finally, the two first friction blocks 462, the first wedge block 464, the two second friction blocks 652, and the second wedge block 654 move between the first rotating rod 42 and the second rotating rod 62. Then, the T-shaped rod 12 is rotated so that it is fastened onto the buckle 13, completing the storage and fixing of the T-shaped rod 12.

[0058] Of course, the above are just typical examples of this application. In addition, this application may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed in this application.

Claims

1. A chainsaw, comprising a body (1) and a chain fastener (2) mounted on the body (1), characterized in that: The machine body (1) is provided with a positioning block (3), and the fastening plate (2) is provided with a first mating groove (21) for the positioning block (3) to pass through. The positioning block (3) is provided with an installation groove (31). A first lead screw (11) is rotatably connected to the machine body (1). The first lead screw (11) extends into the installation groove (31). The machine body (1) is provided with a first control mechanism (4) for controlling the rotation of the first lead screw (11). A first pressure block (5) is slidably connected in the installation groove (31). The first pressure block (5) is threadedly connected to the first lead screw (11). By rotating the first... A lead screw (11) controls the movement of the first pressure block (5); the positioning block (3) has a first inclined surface (32) on each of its two opposite sidewalls, and the two first inclined surfaces (32) have opposite inclination angles; the first pressure block (51) has a first sliding groove (51) on each of its two opposite sidewalls, and a second pressure block (52) is slidably connected in each of the two first sliding grooves (51), and the ends of the two second pressure blocks (52) that are far apart from each other extend out of the first pressure block (5) and fit against the adjacent first inclined surface (32), and the first inclined surface (32) is used to move the first pressure block (5) towards the machine body (1). The force of movement is converted into the force of the second pressure block (52) moving away from the first pressure block (5); in the initial state, the two second pressure blocks (52) can pass through the first mating groove (21); the first control mechanism (4) includes a first bevel tooth (41) sleeved on the first lead screw (11), a first rotating rod (42) rotatably connected to the machine body (1), a second bevel tooth (43) sleeved on the first rotating rod (42) and meshing with the first bevel tooth (41), a first mating part (44) provided on the first rotating rod (42), a control rod (45) rotatably and slidingly connected to the machine body (1), and a control rod (45) provided on the control rod (46). 5) A second mating part (46) is used to connect the first mating part (44). The second mating part (46) is connected to the first mating part (44) during the movement of the control rod (45) so that the first rotating rod (42) can be driven to rotate when the control rod (45) rotates. The first mating part (44) includes a first through hole (441) opened on the end face of the first rotating rod (42) and a second through hole (442) opened on the bottom wall of the first through hole (441) for the control rod (45) to extend into. The first through hole (441) and the second through hole (442) are both located on the movement path of the control rod (45).The second mating part (46) includes two first connecting rods (461), two first friction blocks (462) slidably connected to the two first connecting rods (461), a second inclined surface (463) formed on the first friction block (462), and a first wedge block (464) provided on the control rod (45). The two first connecting rods (461) are respectively located on both sides of the control rod (45). The two first friction blocks (462) are sleeved on the control rod (45). The first wedge block (464) extends between the two second inclined surfaces (463). During the movement of the control rod (45) into the second through hole (442), the first wedge block (464) moves to fit against the two second inclined surfaces (463) and presses the two first friction blocks (462) against the side wall of the first through hole (441), thereby realizing the connection between the control rod (45) and the first rotating rod (42).

2. A chainsaw according to claim 1, characterized in that: A spring (53) is provided in the first slide groove (51). One end of the spring (53) is connected to the second pressure block (52), and the other end of the spring (53) is connected to the side wall of the first slide groove (51) away from the second pressure block (52). When the second pressure block (52) moves away from the first pressure block (5), the spring (53) is stretched by force.

3. A chainsaw according to claim 1, characterized in that: The control lever (45) extends out of the body (1) at the end away from the first rotating lever (42) and is hinged to a T-shaped rod (12). The outer wall of the body (1) is provided with a buckle (13) that engages with the T-shaped rod (12).

4. A chainsaw according to claim 1, characterized in that: The machine body (1) is provided with a sliding groove (14), and an adjusting block (15) slides in the sliding groove (14). The adjusting block (15) extends out of the sliding groove (14). The chain plate (2) is provided with a second mating groove (22) for the adjusting block (15) to pass through. A second lead screw (16) is rotatably connected in the sliding groove (14). The adjusting block (15) is threadedly connected to the second lead screw (16). The machine body (1) is provided with a second control mechanism (6) for controlling the rotation of the second lead screw (16).

5. A chainsaw according to claim 4, characterized in that: The second control mechanism (6) includes a third bevel tooth (61) on the second lead screw (16), a second rotating rod (62) rotatably connected to the machine body (1), a fourth bevel tooth (63) on the second rotating rod (62) and meshing with the third bevel tooth (61), a third mating part (64) on the second rotating rod (62), and a fourth mating part (65) on the control rod (45) for connecting the third mating part (64). The fourth mating part (65) connects with the third mating part (64) during the movement of the control rod (45), so that the second rotating rod (62) rotates when the control rod (45) rotates.

6. A chainsaw according to claim 5, characterized in that: The third mating part (64) includes a third through hole (641) on the second rotating rod (62), the third through hole (641) being directly opposite the first through hole (441), the control rod (45) passing through the second rotating rod (62) and extending out of the second rotating rod (62) through the third through hole (641); the fourth mating part (65) includes two second connecting rods (651), two second friction blocks (652) slidably connected to the two second connecting rods (651), a third inclined surface (653) on the second friction blocks (652), and a second wedge block (654) on the control rod (45), the two second connecting rods (651) being connected to the second connecting rods (651) being connected to the first through hole (441), the control rod (45) being connected to the second connecting rods (651) being connected to the second friction blocks (652 ... The connecting rod (651) is located on both sides of the control rod (45). The two second friction blocks (652) are sleeved on the outside of the control rod (45). The second wedge block (654) extends between the two third inclined surfaces (653). The distance between the second friction block (652) and the first friction block (462) is less than the distance between the first through hole (441) and the third through hole (641). When the control rod (45) moves away from the body (1), the second wedge block (654) moves to fit with the two third inclined surfaces (653) and presses the two second friction blocks (652) against the side wall of the third through hole (641).

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