A chainsaw with replaceable chainsaw chain

Abstract

This application relates to a chainsaw with replaceable chains, including a chainsaw body, a replacement mechanism, and a drive mechanism. The replacement mechanism is used to replace the chainsaw chains. The chainsaw body is provided with a guide plate, and a slide rail is provided on the guide plate. The replacement mechanism includes a protective chamber with several storage cavities and several chainsaw chains. The protective chamber is rotatably connected to the chainsaw body and has an outlet that connects to the several storage cavities. A drive sprocket is rotatably connected to each of the several storage cavities. The drive mechanism is used to drive the rotation of each drive sprocket. A driven sprocket is movably connected to each of the several storage cavities. The several chainsaw chains are respectively engaged with the drive sprocket and driven sprocket of the corresponding storage cavity. When the storage cavity is facing the guide plate, the driven sprocket can move from the outlet to the slide rail and slide along the slide rail. This facilitates quick replacement of chainsaw chains. When the chainsaw is not in use, the chainsaw chains on the guide plate can be stored in the storage cavities to protect them and reduce the possibility of wear when the chainsaw is not in use.

Description

Technical Field

[0001] This invention relates to the field of chainsaw technology, and in particular to a chainsaw with replaceable chainsaw chains. Background Technology

[0002] The working principle of a chainsaw is mainly based on the mixing of fuel and air to form a combustible gas, which is then ignited by an ignition system. This ignition generates an explosive force that drives a piston, ultimately transferring mechanical energy to the chain to achieve the cutting function. Chainsaws typically use a two-stroke gasoline engine as their power source. This engine drives the saw chain to rotate via a sprocket, thereby achieving the purpose of cutting materials such as wood, branches, and ice.

[0003] When using a chainsaw for sawing, the chainsaw chain is prone to wear or breakage, which reduces sawing efficiency and requires replacement. Replacing the chainsaw chain requires disassembling the chainsaw, but chainsaws are usually used in the mountains and forests, and it is difficult to replace the chainsaw chain without disassembly tools. Summary of the Invention

[0004] To facilitate chain replacement in the field, this application provides a chain-replaceable chainsaw.

[0005] The replaceable chain saw provided in this application adopts the following technical solution:

[0006] A chainsaw with replaceable chainsaw chains includes a chainsaw body with a guide plate, a replacement mechanism, and a drive mechanism. The replacement mechanism replaces the chainsaw chains on the guide plate. The replacement mechanism includes a protective chamber with several storage cavities and several chainsaw chains. The protective chamber is rotatably connected to the chainsaw body. Several outlets are provided within the protective chamber, each outlet connecting to one of the storage cavities. Each storage cavity has a rotatably connected drive sprocket. The drive mechanism drives the rotation of each drive sprocket. Each storage cavity has a movably connected driven sprocket. Each chainsaw chain corresponds to one storage cavity and engages with the drive and driven sprockets of its corresponding storage cavity. When the outlet of a storage cavity faces the guide plate, the driven sprocket can move from the outlet into a slide rail and slide along the slide rail.

[0007] By adopting the above technical solution and setting up a replacement mechanism, when the saw chain mounted on the guide plate wears, the driven sprocket on the guide plate and the worn saw chain can be retrieved into the storage cavity, reducing further damage to the saw chain and facilitating subsequent repair. Rotating the protective chamber aligns the outlet corresponding to the other storage cavity with the guide plate, and the driven sprocket in the other storage cavity slides along the guide rail away from the protective chamber to the end and locks, completing the replacement of the saw chain. This facilitates quick replacement of the saw chain outdoors or when there are no professional tools. At the same time, when the chainsaw is not in use, the saw chain on the guide plate can be stored in the storage cavity to protect the saw chain and reduce the possibility of wear when the saw chain is not in use.

[0008] Preferably, it also includes a first bearing, the chainsaw body is provided with a fixed shaft, the protective chamber is provided with a rotating port, the outer ring of the first bearing is coaxial and fixedly connected to the rotating port, and the inner ring of the first bearing is detachably connected to the fixed shaft.

[0009] By adopting the above technical solution, the inner ring of the first bearing is fitted and fixed on the fixed shaft, thus completing the installation of the protective chamber. This allows the protective chamber to be rotatably connected to the chainsaw body. When the saw chain on the guide plate needs to be replaced, the protective chamber rotates along the axial direction of the fixed shaft through the relative rotation of the inner and outer rings of the first bearing.

[0010] Preferably, the guide plate includes a fixed plate and a movable plate. The fixed plate is fixedly connected to the chainsaw body, and the movable plate is slidably connected to the fixed plate along the axis of the drive sprocket. A gap is provided between the movable plate and the fixed plate to allow the driven sprocket to pass through and rotate. A light spring is provided on the movable plate, and the light spring always drives the movable plate to slide away from the fixed plate. When the movable plate slides to its limit position towards the fixed plate, the gap can limit the position of the saw chain on the guide plate.

[0011] By adopting the above technical solution, when the moving plate moves away from the fixed plate, the gap between the moving plate and the fixed plate increases, so that when the saw chain is replaced, the saw chain can pass through the gap between the moving plate and the fixed plate and be retracted into the storage cavity; when the moving plate moves to the limit position towards the fixed plate, the gap between the moving plate and the fixed plate limits the saw chain on the guide plate.

[0012] Preferably, the driven sprocket is coaxially provided with a second bearing, the outer ring of the second bearing is fixedly connected to the driven sprocket, and the inner ring of the second bearing is coaxially fixedly connected to an internal threaded shaft. One end of the internal threaded shaft in the axial direction is provided with a friction block, and the other end of the internal threaded shaft in the axial direction is coaxially and threadedly connected to a threaded post. The end of the threaded post in the axial direction away from the internal threaded shaft is provided with a force-applying block. When the driven sprocket is set on the guide plate, the friction block and the force-applying block abut against the fixed plate and the sliding plate, respectively.

[0013] By adopting the above technical solution, force is applied to the force-applying block to rotate the threaded column. Through the threaded connection between the threaded column and the internal threaded shaft, the threaded column moves along the axial direction of the internal threaded shaft. When the threaded column moves to the point where the friction block and the force-applying block abut against the fixed plate and the sliding plate respectively, the friction between the friction block and the force-applying block and the fixed plate and the sliding plate limits the position of the internal threaded shaft, thereby limiting the position of the driven sprocket on the guide plate. However, the rotation of the driven sprocket is not limited by the second bearing. When the threaded column moves away from the internal threaded shaft, the friction between the friction block and the force-applying block and the fixed plate and the sliding plate is reduced, allowing the position of the internal threaded shaft to move, thereby moving the position of the driven sprocket on the guide plate so that it can be retracted into the receiving cavity.

[0014] Preferably, the protective chamber is rotatably connected to a plurality of protective covers, each of which corresponds to a plurality of outlets. The protective chamber is provided with a mating groove that can engage with the protective cover. When the protective cover is rotated to its limit position toward the outlet, the protective cover blocks the outlet. When the protective cover is rotated toward the side away from the outlet, the protective cover engages with the mating groove.

[0015] By adopting the above technical solution, when the cover covers the outlet, it seals the storage cavity, reducing the possibility of external impurities entering the storage cavity and causing wear to the saw chain inside the storage cavity; when the cover rotates to engage with the mating groove, it guides the chips generated by cutting and protects the operator, reducing the possibility of cutting splashes causing safety hazards to the operator.

[0016] Preferably, the drive mechanism includes a plurality of driven discs, a plurality of square shafts, and a drive component. The plurality of driven discs and square shafts correspond to a plurality of drive sprockets. The plurality of square shafts are coaxial and slidably connected to the corresponding drive sprockets along the axial direction of the drive sprockets. The plurality of driven discs are coaxial and fixedly connected to the corresponding square shafts. A plurality of centrifugal bodies are hinged to the output shaft of the chainsaw body along the axial direction of its output shaft. Each of the plurality of centrifugal bodies is provided with a tension spring. The plurality of tension springs always drive the plurality of centrifugal bodies to rotate toward the output shaft side of the chainsaw body. The drive component is used to drive the sliding of the driven discs. When any driven disc slides toward the chainsaw body to its limit position, the driven disc encloses the plurality of centrifugal bodies.

[0017] By adopting the above technical solution, when the protective chamber is rotated until any driven disc is coaxial with the output shaft of the chainsaw body, the driven disc is driven by the drive component to move towards the centrifugal body side until multiple centrifugal bodies are enclosed inside. Due to the tension of the tension spring, the multiple centrifugal bodies do not contact the side wall of the driven disc. When the output shaft of the chainsaw body rotates, the multiple centrifugal bodies rotate with the output shaft of the chainsaw body. As the speed increases, centrifugal force is generated, causing these centrifugal bodies to abut against the side wall of the driven disc, and friction is generated, causing the driven disc to rotate with it. Therefore, the power is transmitted through the chainsaw body to the drive sprocket, causing the drive sprocket to drive the saw chain. When the output shaft speed of the chainsaw body drops to a certain speed, the centrifugal force decreases, and the tension of the tension spring disengages the centrifugal bodies from the driven disc. Therefore, the driven disc side is not affected by the braking load of the chainsaw body.

[0018] Preferably, the assembly further includes a recovery component for retracting the saw chain into a protective chamber. The recovery component includes a recovery sprocket and several limiting blocks. The recovery sprocket is rotatably connected to the storage cavity along the axis of the drive sprocket and slidably connected to the storage cavity along the axis of the drive sprocket. The several limiting blocks are slidably connected to the storage cavity along the sliding direction of the recovery sprocket. The driving component is used to drive the sliding of the recovery sprocket and the limiting blocks. When the driven disc disengages from the multiple centrifugal bodies, the recovery sprocket slides toward the saw chain until it meshes with the saw chain, and the several limiting blocks simultaneously slide toward the drive sprocket until they abut against the drive sprocket.

[0019] By adopting the above technical solution, when the recovery sprocket is slid into engagement with the saw chain and the drive sprocket remains in a limited position, the limitation on the bearing on the driven sprocket is released, and the recovery sprocket is rotated. Through the meshing connection between the recovery sprocket and the saw chain, the saw chain is recovered into the storage cavity. The driven sprocket is pulled along the slide rail into the storage cavity by the saw chain, which facilitates the recovery and replacement of the saw chain.

[0020] Preferably, the driving component includes a sliding plate and a pull rod. The sliding plate is slidably connected to the receiving cavity along the axial direction of the drive sprocket. The pull rod is rotatably connected to the sliding plate. The retrieval sprocket is rotatably connected to the sliding plate. A plurality of the limiting blocks are respectively fixedly connected to the sliding plate. The pull rod is coaxial and fixedly connected to the retrieval sprocket, and the end of the pull rod away from the retrieval sprocket passes through a protective compartment to the outside.

[0021] By adopting the above technical solution, when the sliding plate slides towards the drive sprocket by pulling the lever, the driven disc disengages from multiple centrifugal bodies, and multiple limiting blocks abut against the drive sprocket, limiting the rotation of the drive sprocket. At the same time, the recovery sprocket meshes with the saw chain, limiting the saw chain in the storage cavity through the drive sprocket and the recovery sprocket. At this time, by rotating the lever, the recovery sprocket can be rotated to recover the saw chain into the storage cavity, facilitating saw chain recovery and replacement. When the sliding plate slides away from the drive sprocket, the driven disc wraps around multiple centrifugal bodies, further limiting the position of the protective chamber. The limiting blocks disengage from the drive sprocket, and the recovery sprocket disengages from the saw chain, releasing the limitation on the saw chain in the storage cavity. At this time, the driven sprocket is moved out of the storage cavity to the guide rail, and the saw chain can also be moved out of the storage cavity to the guide rail, completing the installation of the saw chain and facilitating saw chain replacement.

[0022] Preferably, the sliding plate is provided with a mounting opening, and when the driven sprocket is located in the storage cavity, the driven sprocket is detachably connected to the mounting opening.

[0023] By adopting the above technical solution, the position of the driven sprocket in the storage cavity is limited, reducing the possibility of the driven sprocket moving in the storage cavity.

[0024] Preferably, the end of the pull rod away from the recovery sprocket is provided with a force application handle, the force application handle is provided with a locking block, the protective chamber is provided with a locking groove, and the locking groove is provided with a mating opening. When the recovery sprocket slides away from the saw chain, the locking block moves into the locking groove through the mating opening and can move within the locking groove.

[0025] By adopting the above technical solution, the force-applying handle facilitates the application of force to the pull rod, thereby facilitating the replacement of the saw chain. At the same time, by setting the locking block and locking groove, the position of the sliding plate is limited, reducing the possibility of sliding plate displacement.

[0026] The main technical effects of this invention are reflected in the following aspects:

[0027] 1. This invention incorporates a replacement mechanism. When the saw chain on the guide plate wears, the driven sprocket on the guide plate and the worn saw chain can be retracted into the storage cavity, reducing further damage to the saw chain and facilitating subsequent repair. The protective chamber is rotated to align the outlet of the other storage cavity with the guide plate, and the driven sprocket in the other storage cavity is slid along the guide rail away from the protective chamber to the end and locked, completing the saw chain replacement. This facilitates quick saw chain replacement outdoors or when no professional tools are available. Furthermore, when the chainsaw is not in use, the saw chain on the guide plate can be stored in the storage cavity to protect it and reduce the possibility of wear when not in use.

[0028] 2. This invention, by setting up centrifugal bodies and driven discs, allows the protective chamber to rotate until any driven disc is coaxial with the output shaft of the chainsaw body. The drive unit then drives the driven disc towards the centrifugal body side to enclose multiple centrifugal bodies. Due to the tension of the spring, the multiple centrifugal bodies do not contact the side wall of the driven disc. When the output shaft of the chainsaw body rotates, the multiple centrifugal bodies rotate with it. As the speed increases, centrifugal force is generated, causing these centrifugal bodies to abut against the side wall of the driven disc, generating friction that causes the driven disc to rotate with it. Therefore, power is transmitted through the chainsaw body to the drive sprocket, which drives the saw chain. When the output shaft speed of the chainsaw body decreases to a certain speed, the centrifugal force decreases, and the tension of the spring disengages the centrifugal bodies from the driven disc. Therefore, the driven disc side is not affected by the braking load of the chainsaw body.

[0029] 3. This invention, by setting a sliding plate and a pull rod, allows the driven plate to slide towards the drive sprocket when the pull rod is pulled. This causes the driven plate to disengage from multiple centrifugal bodies and multiple limiting blocks to abut against the drive sprocket, limiting its rotation. Simultaneously, the recovery sprocket engages with the saw chain, limiting the saw chain within the storage cavity through the drive and recovery sprockets. At this point, rotating the pull rod causes the recovery sprocket to rotate, allowing the saw chain to be retrieved into the storage cavity, facilitating its replacement. When the sliding plate slides away from the drive sprocket, the driven plate wraps around multiple centrifugal bodies, further limiting the position of the protective chamber. The limiting blocks disengage from the drive sprocket, and the recovery sprocket disengages from the saw chain, releasing the restriction on the saw chain within the storage cavity. At this point, the driven sprocket is moved out of the storage cavity onto the guide rail, and the saw chain is also moved out of the storage cavity onto the guide rail, completing the saw chain installation and facilitating its replacement. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0031] Figure 2 This is a schematic diagram of the replacement mechanism structure in an embodiment of this application.

[0032] Figure 3 This is a schematic diagram of the structure of the recycling component in an embodiment of this application.

[0033] Figure 4 This is a schematic diagram of the main structure of the chainsaw according to an embodiment of this application.

[0034] Figure 5 It is along Figure 4 Enlarged view of point A in the middle.

[0035] Figure 6 It is along Figure 4 Enlarged view of point B in the middle.

[0036] Figure 7This is a schematic diagram of the protective compartment structure in an embodiment of this application.

[0037] Figure 8 This is a schematic diagram of the drive mechanism structure in an embodiment of this application.

[0038] Figure 9 This is a schematic diagram of the storage cavity structure in an embodiment of this application.

[0039] Figure 10 This is a schematic diagram of the movable plate structure according to an embodiment of this application.

[0040] Explanation of reference numerals in the attached drawings: 1. Chainsaw body; 11. Fixed shaft; 12. First bearing; 13. Centrifugal body; 14. Tension spring; 15. Snap-fit ​​groove; 16. Mating joint; 2. Saw chain; 3. Guide plate; 31. Fixed plate; 32. Moving plate; 33. Guide block; 34. Light spring; 35. Clearance; 36. Slide rail; 4. Replacement mechanism; 41. Protective chamber; 411. Rotating opening; 412. Protective cover; 413. Mating groove; 42. Storage. 43. Cavity; 44. Outlet; 45. Drive sprocket; 46. Driven sprocket; 47. Second bearing; 48. Internal threaded shaft; 49. Threaded column; 40. Friction block; 41. Force application block; 52. Drive mechanism; 53. Driven disc; 64. Square shaft; 75. Recycling assembly; 66. Recycling sprocket; 77. Limiting block; 88. Drive component; 99. Sliding plate; 100. Pull rod; 11. Force application handle; 12. Snap-fit ​​block; 13. Installation port. Detailed Implementation

[0041] The following is in conjunction with the appendix Figures 1-10 This application will be described in further detail to make the technical solution of this application easier to understand and master.

[0042] This application discloses a chainsaw with replaceable chainsaw chains.

[0043] Reference Figure 1 and Figure 2This embodiment of a chainsaw with replaceable chainsaws includes a chainsaw body 1, a guide plate 3 fixedly connected to the chainsaw body 1, a replacement mechanism 4, and a drive mechanism 5. The replacement mechanism 4 is used to replace the chainsaw 2 on the guide plate 3. The replacement mechanism 4 includes a protective chamber 41 with several storage cavities 42 and several chainsaw 2. The protective chamber 41 is rotatably connected to the chainsaw body 1. Several outlets 43 are respectively opened in the protective chamber 41, and the outlets 43 are respectively connected to the several storage cavities 42. Each of the 2 is rotatably connected to a drive sprocket 44, and the drive mechanism 5 is used to drive the rotation of the drive sprocket 44. Each of the several storage cavities 42 is movably connected to a driven sprocket 45. Each of the several saw chains 2 corresponds to a several storage cavity 42. Each of the several saw chains 2 is engaged with the drive sprocket 44 and the driven sprocket 45 of the corresponding storage cavity 42. When the outlet 43 corresponding to the storage cavity 42 is facing the guide plate 3, the driven sprocket 45 can move from the outlet 43 into the slide rail 36 and slide along the slide rail 36.

[0044] Reference Figure 1 and Figure 2 By setting a replacement mechanism 4, when the saw chain 2 placed on the guide plate 3 is worn, the driven sprocket 45 on the guide plate 3 and the worn saw chain 2 can be retracted into the storage cavity 42, reducing further damage to the saw chain 2 and facilitating subsequent repair; rotate the protective chamber 41 to align the outlet 43 corresponding to the other storage cavity 42 with the guide plate 3, and slide the driven sprocket 45 in the other storage cavity 42 along the guide rail to the end away from the protective chamber 41 and lock it, completing the replacement of the saw chain 2; at the same time, it is convenient to quickly replace the saw chain outdoors or when there are no professional tools. When the chainsaw is not in use, the saw chain 2 on the guide plate 3 can be placed in the storage cavity 42 to protect the saw chain 2 and reduce the possibility of wear of the saw chain 2 when it is not in use.

[0045] Reference Figure 3 and Figure 4 The system also includes a first bearing 12, a fixed shaft 11 fixedly connected to the chainsaw body 1, a rotating opening 411 on the protective chamber 41, an outer ring of the first bearing 12 coaxially and fixedly connected to the rotating opening 411, and an inner ring of the first bearing 12 detachably connected to the fixed shaft 11. By fitting and fixing the inner ring of the first bearing 12 onto the fixed shaft 11, the installation of the protective chamber 41 is completed, allowing it to be rotatably connected to the chainsaw body 1. When the saw chain 2 on the guide plate 3 needs to be replaced, the relative rotation of the inner and outer rings of the first bearing 12 causes the protective chamber 41 to rotate along the axial direction of the fixed shaft 11.

[0046] Reference Figure 4 and Figure 6The guide plate 3 includes a fixed plate 31 and a movable plate 32. The fixed plate 31 is fixedly connected to the chainsaw body 1. The movable plate 32 is slidably connected to the fixed plate 31 along the axis of the drive sprocket 44. A gap 35 is provided between the movable plate 32 and the fixed plate 31 to allow the driven sprocket 45 to pass through and rotate. A plurality of guide blocks 33 are fixedly connected to the fixed plate 31. The movable plate 32 is respectively inserted through the end of the plurality of guide blocks 33 away from the fixed plate 31, so that the movable plate 32 is slidably connected to the guide blocks 33. A light spring 34 is respectively sleeved on the plurality of guide blocks 33. The two ends of the light spring 34 abut against the fixed plate 31 and the movable plate 32 respectively. The light spring 34 always drives the movable plate 32 to slide away from the fixed plate 31. When the movable plate 32 slides to the limit position towards the fixed plate 31, the gap 35 can limit the position of the saw chain 2 on the guide plate 3. When the movable plate 32 moves away from the fixed plate 31, the gap 35 between the movable plate 32 and the fixed plate 31 increases, so that when the saw chain 2 is replaced, the saw chain 2 can pass through the gap 35 between the movable plate 32 and the fixed plate 31 and be retracted into the storage cavity 42; when the movable plate 32 moves to the limit position towards the fixed plate 31, the gap 35 between the movable plate 32 and the fixed plate 31 limits the saw chain 2 on the guide plate 3.

[0047] Reference Figure 2 and Figure 3 A second bearing 451 is coaxially and fixedly connected to the driven sprocket 45. The outer ring of the second bearing 451 is fixedly connected to the driven sprocket 45. The inner ring of the second bearing 451 is coaxially and fixedly connected to an internal threaded shaft 452. A friction block 454 is fixedly connected to one end of the internal threaded shaft 452 along its axis, and a threaded post 453 is coaxially and threadedly connected to the other end of the internal threaded shaft 452 along its axis. A force-applying block 455 is fixedly connected to the end of the threaded post 453 away from the internal threaded shaft 452 along its axis. When the driven sprocket 45 is mounted on the guide plate 3, the friction block 454 and the force-applying block 455 abut against the fixed plate 31 and the sliding plate 71, respectively.

[0048] Reference Figure 2 and Figure 3By applying force to the force-applying block 455, the threaded post 453 is rotated. Through the threaded connection between the threaded post 453 and the internal threaded shaft 452, the threaded post 453 moves along the axial direction of the internal threaded shaft 452. When the threaded post 453 moves to the point where the friction block 454 and the force-applying block 455 abut against the fixed plate 31 and the sliding plate 71 respectively, the friction between the friction block 454 and the force-applying block 455 and the fixed plate 31 and the sliding plate 71 affects the position of the internal threaded shaft 452. The driven sprocket 45 is positioned on the guide plate 3 by a limit switch, but the rotation of the driven sprocket 45 is not limited by the second bearing 451. When the threaded column 453 moves away from the internal threaded shaft 452, the friction between the friction block 454 and the force application block 455 and the fixed plate 31 and the sliding plate 71 is reduced, so that the position of the internal threaded shaft 452 can be moved, thereby moving the position of the driven sprocket 45 on the guide plate 3 so that it can be retracted into the receiving cavity 42.

[0049] Reference Figure 7 and Figure 8 A plurality of protective covers 412 are rotatably connected to the protective chamber 41, and each protective cover 412 corresponds to a plurality of outlets 43. The protective chamber 41 is provided with mating grooves 413 that engage with the protective covers 412. When a protective cover 412 rotates to its limit position toward the outlet 43, it covers the outlet 43. When a protective cover 412 rotates away from the outlet 43, it engages with the mating grooves 413. When the protective cover 412 covers the outlet 43, it seals the receiving cavity 42, reducing the possibility of external impurities entering the receiving cavity 42 and causing wear to the saw chain 2 inside. When the protective cover 412 rotates to engage with the mating grooves 413, it guides the cutting debris and protects the operator, reducing the possibility of cutting debris posing a safety hazard to the operator.

[0050] Reference Figure 4 , Figure 5 , Figure 8 and Figure 9The drive mechanism 5 includes several driven discs 51, several square shafts 52, and a drive component 7. The driven discs 51 and several square shafts 52 correspond to several drive sprockets 44 respectively. The several square shafts 52 are coaxial and slidably connected to the corresponding drive sprockets 44 along the axial direction of the drive sprockets 44. The several driven discs 51 are coaxial and fixedly connected to the corresponding square shafts 52 respectively. Multiple centrifugal bodies 13 are hinged to the output shaft of the chainsaw body 1 along the axial direction of its output shaft. Tension springs 14 are installed on the multiple centrifugal bodies 13 respectively. The two ends of the tension springs 14 are fixedly connected to the centrifugal bodies 13 and the output shaft of the chainsaw body 1 respectively. The multiple tension springs 14 always drive the multiple centrifugal bodies 13 to rotate toward the output shaft side of the chainsaw body 1. The drive component 7 is used to drive the sliding of the driven discs 51. When any driven disc 51 slides toward the chainsaw body 1 to the limit position, the driven disc 51 encloses the multiple centrifugal bodies 13.

[0051] Reference Figure 4 , Figure 5 , Figure 8 and Figure 9 When the protective chamber 41 is rotated until any driven disc 51 is coaxial with the output shaft of the chainsaw body 1, the driven disc 51 is driven by the drive component 7 to move towards the centrifugal body 13 until multiple centrifugal bodies 13 are enclosed. Due to the tension of the tension spring 14, the multiple centrifugal bodies 13 do not contact the side wall of the driven disc 51. When the output shaft of the chainsaw body 1 rotates, the multiple centrifugal bodies 13 rotate with the output shaft of the chainsaw body 1. As the speed increases, centrifugal force is generated, causing these centrifugal bodies 13 to abut against the side wall of the driven disc 51, and friction is generated, causing the driven disc to rotate with it. Therefore, the power is transmitted through the chainsaw body 1 to the drive sprocket 44, causing the drive sprocket 44 to drive the saw chain 2 to move. When the output shaft speed of the chainsaw body 1 drops to a certain speed, the centrifugal force decreases, and the tension of the tension spring 14 disengages the centrifugal bodies 13 from the driven disc 51. Therefore, the driven disc 51 is not affected by the braking load of the chainsaw body 1.

[0052] Reference Figure 3 and Figure 7 It also includes a recovery component 6, which is used to retract the saw chain 2 into the protective chamber 41. The recovery component 6 includes a recovery sprocket 61 and several limiting blocks 62. The recovery sprocket 61 is rotatably connected to the storage chamber 42 along the axis of the drive sprocket 44, and the recovery sprocket 61 is slidably connected to the storage chamber 42 along the axis of the drive sprocket 44. Several limiting blocks 62 are slidably connected to the storage chamber 42 along the sliding direction of the recovery sprocket 61. The driving component 7 is used to drive the sliding of the recovery sprocket 61 and the limiting blocks 62. When the driven disc 51 disengages from the multiple centrifugal bodies 13, the recovery sprocket 61 slides toward the saw chain 2 until it meshes with the saw chain 2, and the several limiting blocks 62 slide toward the drive sprocket 44 until they abut against the drive sprocket 44.

[0053] Reference Figure 3 and Figure 7 When the recovery sprocket 61 is slid to engage with the saw chain 2, and the drive sprocket 44 remains in the limited position, the limit on the bearing on the driven sprocket 45 is released, and the recovery sprocket 61 is rotated. Through the meshing connection between the recovery sprocket 61 and the saw chain 2, the saw chain 2 is recovered into the storage cavity 42. The driven sprocket 45 is pulled along the slide rail 36 to slide into the storage cavity 42 by the saw chain 2, which facilitates the recovery and replacement of the saw chain 2.

[0054] Reference Figure 9 and Figure 10 The driving component 7 includes a sliding plate 71 and a pull rod 72. The sliding plate 71 is slidably connected to the receiving cavity 42 along the axial direction of the drive sprocket 44. The pull rod 72 is rotatably connected to the sliding plate 71. The recovery sprocket 61 is rotatably connected to the sliding plate 71. Multiple limit blocks 62 are fixedly connected to the sliding plate 71 respectively. The pull rod 72 is coaxial and fixedly connected to the recovery sprocket 61, and the end of the pull rod 72 away from the recovery sprocket 61 passes through the protective chamber 41 to the outside.

[0055] Reference Figure 9 and Figure 10 By pulling the lever 72, when the sliding plate 71 slides towards the drive sprocket 44, the driven plate 51 disengages from the multiple centrifugal bodies 13, and the multiple limiting blocks 62 abut against the drive sprocket 44, limiting the rotation of the drive sprocket 44. Simultaneously, the recovery sprocket 61 engages with the saw chain 2. The drive sprocket 44 and the recovery sprocket 61 limit the saw chain 2 within the storage cavity 42. At this time, rotating the lever 72 causes the recovery sprocket 61 to rotate, allowing the saw chain 2 to be recovered into the storage cavity 42, facilitating its recovery and thus improving efficiency. Replace the saw chain 2; when the sliding plate 71 slides away from the drive sprocket 44, the driven plate 51 wraps around multiple centrifugal bodies 13, further limiting the position of the protective chamber 41. The limiting block 62 disengages from the drive sprocket 44 and the recovery sprocket 61 disengages from the saw chain 2, releasing the limitation on the saw chain 2 in the storage cavity 42. At this time, the driven sprocket 45 is moved out of the storage cavity 42 to the slide rail 36 of the guide plate 3. At the same time, the saw chain 2 can be moved out of the storage cavity 42 to the slide rail 36 of the guide plate 3, completing the installation of the saw chain 2 and facilitating the replacement of the saw chain 2.

[0056] Reference Figure 9 and Figure 10The sliding plate 71 has a mounting opening 75. When the driven sprocket 45 is located in the receiving cavity 42, the driven sprocket 45 is detachably connected to the mounting opening 75, that is, the internal thread shaft 452 is located in the mounting opening 75, and the threaded post 453 moves until the force application block 455 and the friction block 454 abut against the two sides of the sliding plate 71. The position of the driven sprocket 45 in the receiving cavity 42 is limited, reducing the possibility of the driven sprocket 45 moving in the receiving cavity 42, facilitating the replacement of the saw chain 2 on the chainsaw, and reducing the possibility of wear on the driven sprocket 45.

[0057] Reference Figure 2 , Figure 9 and Figure 10 A force-applying handle 73 is fixedly connected to the end of the pull rod 72 away from the recovery sprocket 61. A locking block 74 is fixedly connected to the force-applying handle 73. A locking groove 15 is provided on the protective chamber 41, and a mating opening 16 is provided on the locking groove 15. When the recovery sprocket 61 slides away from the saw chain 2, the locking block 74 moves into the locking groove 15 through the mating opening 16 and can move within the locking groove 15. By setting the force-applying handle 73, it is easy to apply force to the pull rod 72, thereby facilitating the replacement of the saw chain 2. At the same time, by setting the locking block 74 and the locking groove 15, the position of the sliding plate 71 is limited, reducing the possibility of displacement of the sliding plate 71.

[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 with replaceable chains, comprising a chainsaw body (1), wherein a guide plate (3) is provided on the chainsaw body (1), characterized in that: It also includes a replacement mechanism (4) and a drive mechanism (5). The replacement mechanism (4) is used to replace the saw chains (2) on the guide plate (3). The replacement mechanism (4) includes a protective chamber (41) with several storage cavities (42) and several saw chains (2). The protective chamber (41) is rotatably connected to the chainsaw body (1). Several outlets (43) are opened in the protective chamber (41). Several outlets (43) are respectively connected to several storage cavities (42). A drive sprocket (44) is rotatably connected in each of the several storage cavities (42). The drive mechanism (5) The mechanism (5) is used to drive the rotation of the drive sprocket (44) respectively. A driven sprocket (45) is movably connected in each of the several storage cavities (42). A number of saw chains (2) correspond to a number of storage cavities (42). A number of saw chains (2) are meshed with the drive sprocket (44) and driven sprocket (45) of the corresponding storage cavity (42). When the outlet (43) corresponding to the storage cavity (42) is facing the guide plate (3), the driven sprocket (45) can move from the outlet (43) to the slide rail (36) and slide along the slide rail (36). It also includes a first bearing (12), a fixed shaft (11) is provided on the chainsaw body (1), a rotating port (411) is provided on the protective chamber (41), the outer ring of the first bearing (12) is coaxial and fixedly connected to the rotating port (411), and the inner ring of the first bearing (12) is detachably connected to the fixed shaft (11). The guide plate (3) includes a fixed plate (31) and a movable plate (32). The fixed plate (31) is fixedly connected to the chainsaw body (1). The movable plate (32) is slidably connected to the fixed plate (31) along the axis of the drive sprocket (44). A gap (35) is provided between the movable plate (32) and the fixed plate (31) for the driven sprocket (45) to pass through and rotate. A light spring (34) is provided on the movable plate (32). The light spring (34) always drives the movable plate (32) to slide away from the fixed plate (31). When the movable plate (32) slides to the limit position towards the fixed plate (31), the gap (35) can limit the position of the saw chain (2) on the guide plate (3).

2. A chainsaw with replaceable chainsaw chain according to claim 1, characterized in that: The driven sprocket (45) is coaxially provided with a second bearing (451). The outer ring of the second bearing (451) is fixedly connected to the driven sprocket (45). The inner ring of the second bearing (451) is coaxially fixedly connected to an internal thread shaft (452). One end of the internal thread shaft (452) in the axial direction is provided with a friction block (454), and the other end of the internal thread shaft (452) in the axial direction is coaxially and threadedly connected to a threaded column (453). The end of the threaded column (453) away from the internal thread shaft (452) in the axial direction is provided with a force-applying block (455). When the driven sprocket (45) is set on the guide plate (3), the friction block (454) and the force-applying block (455) abut against the fixed plate (31) and the sliding plate (71) respectively.

3. A chainsaw with replaceable chainsaw chain according to claim 1, characterized in that: The protective chamber (41) is rotatably connected to a plurality of protective covers (412), each of which corresponds to a plurality of outlets (43). The protective chamber (41) is provided with a mating groove (413) that can engage with the protective cover (412). When the protective cover (412) rotates to its limit position toward the outlet (43), the protective cover (412) covers the outlet (43). When the protective cover (412) rotates toward the side away from the outlet (43), the protective cover (412) engages with the mating groove (413).

4. A chainsaw with replaceable chainsaw chain according to claim 1, characterized in that: The drive mechanism (5) includes several driven discs (51), several square shafts (52), and a drive component (7). The driven discs (51) and square shafts (52) correspond to several drive sprockets (44). The square shafts (52) are coaxially and slidably connected to the corresponding drive sprockets (44) along the axial direction of the drive sprockets (44). The driven discs (51) are coaxially and fixedly connected to the corresponding square shafts (52). The output of the chainsaw body (1) Multiple centrifugal bodies (13) are hinged on the shaft along the axis of its output shaft. Each of the multiple centrifugal bodies (13) is provided with a tension spring (14). The multiple tension springs (14) always drive the multiple centrifugal bodies (13) to rotate toward the output shaft side of the chainsaw body (1). The driving member (7) is used to drive the sliding of the driven plate (51). When any driven plate (51) slides toward the chainsaw body (1) to the limit position, the driven plate (51) encloses the multiple centrifugal bodies (13).

5. A chainsaw with replaceable saw chains according to claim 4, characterized in that: It also includes a recovery assembly (6), which is used to retract the saw chain (2) into the protective chamber (41). The recovery assembly (6) includes a recovery sprocket (61) and several limiting blocks (62). The recovery sprocket (61) is rotatably connected to the storage cavity (42) along the axial direction of the drive sprocket (44), and the recovery sprocket (61) is slidably connected to the storage cavity (42) along the axial direction of the drive sprocket (44). The several limiting blocks (62) The drive unit (7) is slidably connected to the receiving cavity (42) along the sliding direction of the recycling sprocket (61). The drive unit (7) is used to drive the sliding of the recycling sprocket (61) and the limiting block (62). When the driven disc (51) disengages from the multiple centrifugal bodies (13), the recycling sprocket (61) slides toward the saw chain (2) until it meshes with the saw chain (2), and the limiting blocks (62) slide toward the driving sprocket (44) until they abut against the driving sprocket (44).

6. A chainsaw with replaceable saw chains according to claim 5, characterized in that: The driving component (7) includes a sliding plate (71) and a pull rod (72). The sliding plate (71) is slidably connected to the receiving cavity (42) along the axial direction of the drive sprocket (44). The pull rod (72) is rotatably connected to the sliding plate (71). The recycling sprocket (61) is rotatably connected to the sliding plate (71). Multiple limiting blocks (62) are fixedly connected to the sliding plate (71). The pull rod (72) is coaxial and fixedly connected to the recycling sprocket (61). The end of the pull rod (72) away from the recycling sprocket (61) passes through the protective chamber (41) to the outside.

7. A chainsaw with replaceable saw chains according to claim 6, characterized in that: The sliding plate (71) is provided with a mounting opening (75). When the driven sprocket (45) is located in the storage cavity (42), the driven sprocket (45) can be detachably connected to the mounting opening (75).

8. A chainsaw with replaceable saw chains according to claim 6, characterized in that: The pull rod (72) has a force-applying handle (73) at the end away from the recovery sprocket (61). The force-applying handle (73) has a locking block (74). The protective chamber (41) has a locking groove (15) and a mating opening (16) on the locking groove (15). When the recovery sprocket (61) slides away from the saw chain (2), the locking block (74) moves into the locking groove (15) through the mating opening (16) and can move within the locking groove (15).

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