Chain saw with replaceable saw chain

Abstract

The chain saw comprises a chain saw body, a replacing mechanism and a driving mechanism, the replacing mechanism is used for replacing the saw chains, a guide plate is arranged on the chain saw body, a sliding rail is arranged on the guide plate, the replacing mechanism comprises a protection bin with a plurality of storage cavities and the saw chains, and the protection bin is rotationally connected to the chain saw body; outlets communicating with the multiple storage cavities are formed in the protection bin, driving chain wheels are rotationally connected into the multiple storage cavities correspondingly, the driving mechanism is used for driving the driving chain wheels to rotate correspondingly, driven chain wheels are movably connected into the multiple storage cavities correspondingly, and the multiple saw chains are in engaged connection with the driving chain wheels and the driven chain wheels of the corresponding storage cavities correspondingly. When the storage cavity right faces the guide plate, the driven chain wheel can move into the sliding rail from the outlet and slide along the sliding rail. According to the chain saw, the saw chain on the guide plate can be stored in the storage cavity when the chain saw is not used, so that the saw chain is protected, and the possibility that the saw chain is abraded in an unused state is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of chain saws, and in particular to a chain saw with a replaceable saw chain. Background Art

[0002] The working principle of the chain saw is mainly to mix fuel with air to form a combustible gas, which is then ignited by the ignition system to generate explosive force, push the piston to move, and finally transfer mechanical energy to the chain to achieve the cutting function. Chain saws usually use a two-stroke gasoline engine as a power source. This engine drives the saw chain to rotate through a sprocket transmission, thereby achieving the purpose of cutting materials such as wood, branches, and ice.

[0003] When using a chainsaw for sawing, the saw chain is prone to wear or breakage, which reduces the sawing efficiency and requires replacement of the saw chain. The chainsaw needs to be disassembled for replacement, but chainsaws are usually used outdoors in mountains and forests. It is difficult to replace the saw chain of a chainsaw without disassembly tools. Summary of the invention

[0004] In order to facilitate the replacement of saw chains in the field, the present application provides a chain saw with a replaceable saw chain.

[0005] The present application provides a chain replaceable oil saw adopting the following technical solution: A chain saw with replaceable saw chain, comprising a chain saw main body, a guide plate being provided on the chain saw main body, a replacement mechanism and a driving mechanism, the replacement mechanism being used for replacing the saw chain on the guide plate, the replacement mechanism comprising a protection bin with a plurality of storage chambers and a plurality of saw chains, the protection bin being rotatably connected to the chain saw main body, a plurality of outlets being respectively opened in the protection bin, a plurality of the outlets being respectively connected to a plurality of storage chambers, a plurality of the storage chambers being rotatably connected with driving sprockets, the driving mechanism being used for respectively driving the rotation of the driving sprockets, a plurality of the storage chambers being movably connected with driven sprockets, a plurality of the saw chains corresponding to a plurality of storage chambers, a plurality of the saw chains being respectively meshed and connected with the driving sprocket and the driven sprocket of the corresponding storage chambers, and when the outlet corresponding to the storage chamber faces the guide plate, the driven sprocket can move from the outlet into a slide rail and slide along the slide rail.

[0006] By adopting the above technical solution and setting a replacement mechanism, when the saw chain installed on the guide plate is worn, the driven sprocket on the guide plate and the worn saw chain can be recovered into the storage chamber, so as to reduce the further damage of the saw chain and facilitate subsequent repair; the protection chamber is rotated to align the outlet corresponding to the other storage chamber with the guide plate, and the driven sprocket in the other storage chamber is slid along the guide rail to the side away from the protection chamber to the end and locked, so as to complete the replacement of the saw chain; the saw chain can be quickly replaced outdoors or without professional tools, and when the oil saw is not in use, the saw chain on the guide plate can be stored in the storage chamber to protect the saw chain and reduce the possibility of wear of the saw chain when not in use.

[0007] Preferably, it further includes a first bearing, a fixed shaft is provided on the chain saw body, a rotating opening is opened on the protection bin, the outer ring of the first bearing is coaxial and fixedly connected to the rotating opening, and the inner ring of the first bearing is detachably connected to the fixed shaft.

[0008] By adopting the above technical solution, the inner ring of the first bearing is sleeved and fixed on the fixed shaft, thus completing the installation of the protection bin, so that the protection bin can be rotatably connected to the chain saw body. When the saw chain on the guide plate needs to be replaced, the inner ring and outer ring of the first bearing are relatively rotated to make the protection bin rotate along the axial direction of the fixed shaft.

[0009] Preferably, the guide plate includes a fixed plate and a movable plate, the fixed plate is fixedly connected to the chain saw body, the movable plate is slidably connected to the fixed plate along the axial direction of the driving sprocket, a gap is provided between the movable plate and the fixed plate for the driven sprocket to pass through and rotate, a light spring is provided on the movable plate, the light spring always drives the movable plate to slide toward the side away from the fixed plate; when the movable plate slides to the extreme position toward the side of the fixed plate, the gap can limit the position of the saw chain on the guide plate.

[0010] By adopting the above technical solution, when the movable plate moves toward the side away from the fixed plate, the gap between the movable plate and the fixed plate becomes larger, so that when the saw chain is replaced, the saw chain can pass through the gap between the movable plate and the fixed plate and be recovered into the storage cavity; when the movable plate moves to the extreme position toward the fixed plate, the gap between the movable plate and the fixed plate limits the saw chain on the guide plate.

[0011] 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, the inner ring of the second bearing is coaxially fixedly connected with an internally threaded shaft, one end of the internally threaded shaft in the axial direction is provided with a friction block, and the other end of the internally threaded shaft in the axial direction is coaxially and threadedly connected with a threaded column, and a force block is provided at the end of the threaded column in the axial direction away from the internally threaded shaft, and when the driven sprocket is set on the guide plate, the friction block and the force block are respectively abutted against the fixed plate and the sliding plate.

[0012] By adopting the above technical scheme, the threaded column is rotated by applying force to the force block, and the threaded column is moved along the axial direction of the internal threaded shaft through the threaded connection between the threaded column and the internal threaded shaft. When the threaded column moves until the friction block and the force block are respectively abutted against the fixed plate and the sliding plate, the position of the internal threaded shaft is limited by the friction force between the friction block and the force block and the fixed plate and the sliding plate, thereby limiting the position of the driven sprocket on the guide plate, but 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 force between the friction block and the force block and the fixed plate and the sliding plate is reduced, so that the position of the internal threaded shaft can be moved, thereby moving the position of the driven sprocket on the guide plate so that it can be retracted into the receiving cavity.

[0013] Preferably, a plurality of protective covers are rotatably connected to the protective bin, and the plurality of protective covers correspond to a plurality of outlets respectively. The protective bin is respectively provided with mating grooves that can be snap-fitted with the protective covers. When the protective cover is rotated to an extreme position toward the outlet, the protective cover covers the outlet. When the protective cover is rotated toward a side away from the outlet, the protective cover cooperates with the mating groove.

[0014] By adopting the above technical solution, when the protective cover covers the outlet, the storage chamber is sealed, reducing the possibility of foreign impurities entering the storage chamber and causing wear on the saw chain in the storage chamber; when the protective cover is rotated to cooperate with the matching groove, it guides the debris generated by cutting and protects the operator, reducing the possibility of cutting splashes posing a safety hazard to the operator.

[0015] Preferably, the driving mechanism includes a plurality of driven disks, a plurality of square shafts and a driving member, the plurality of driven disks and the plurality of square shafts respectively correspond to a plurality of driving sprockets, the plurality of square shafts are respectively coaxially and slidably connected to the corresponding driving sprockets along the axial direction of the driving sprocket, the plurality of driven disks are respectively coaxially and fixedly connected to the corresponding square shafts, a plurality of centrifugal bodies are respectively hinged on the output shaft of the oil saw body along the axial direction of its output shaft, the plurality of centrifugal bodies are respectively provided with tension springs, the plurality of tension springs always drive the plurality of centrifugal bodies to rotate toward the output shaft side of the oil saw body, the driving member is used to drive the sliding of the driven disk, and when any driven disk slides toward the side of the oil saw body to the extreme position, the driven disk wraps the plurality of centrifugal bodies therein.

[0016] By adopting the above technical solution, when the protection bin is rotated until any driven disk is coaxial with the output shaft of the chain saw body, the driven disk is driven by the driving member toward the side of the centrifugal body until the multiple centrifugal bodies are wrapped therein. Due to the tension of the tension spring, the multiple centrifugal bodies do not contact the side wall of the driven disk. When the output shaft of the chain saw body rotates, the multiple centrifugal bodies rotate with the output shaft of the chain saw body. As the speed increases, centrifugal force is generated to make these centrifugal bodies abut against the side wall of the driven disk, and friction is generated to make the driven plate rotate therewith. Therefore, power is transmitted to the active sprocket through the chain saw body, so that the active sprocket drives the saw chain to move; when the output shaft speed of the chain saw body drops to a certain speed, the centrifugal force decreases, and the tension of the tension spring separates the centrifugal body from the driven disk. Therefore, one side of the driven disk is not affected by the braking load of the chain saw body.

[0017] Preferably, it also includes a recovery component, which is used to retract the saw chain into the protective bin, and the recovery component includes a recovery sprocket and a plurality of limit blocks, the recovery sprocket is rotatably connected in the storage cavity along the axial direction of the driving sprocket, and the recovery sprocket is slidably connected in the storage cavity along the axial direction of the driving sprocket, and the plurality of limit blocks are respectively slidably connected in the storage cavity along the sliding direction of the recovery sprocket, and the driving member is simultaneously used to drive the sliding of the recovery sprocket and the limit blocks, and when the driven disk is disengaged from the plurality of centrifugal bodies, the recovery sprocket slides toward one side of the saw chain until it meshes with the saw chain, and the plurality of limit blocks simultaneously slide toward one side of the driving sprocket until they abut against the driving sprocket.

[0018] By adopting the above technical solution, when the recovery sprocket is slid to engage with the saw chain and the driving sprocket remains in a limited state, the limit 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 to the storage cavity, and the driven sprocket is pulled by the saw chain to slide along the slide rail and recovered into the storage cavity, which is convenient for the recovery and replacement of the saw chain.

[0019] Preferably, the driving member includes a sliding plate and a pull rod, the sliding plate is slidably connected in the storage cavity along the axial direction of the driving sprocket, the pull rod is rotatably connected to the sliding plate, the recovery sprocket is rotatably connected to the sliding plate, the multiple limit blocks are respectively fixedly connected to the sliding plate, the pull rod is coaxial and fixedly connected to the recovery sprocket, and the end of the pull rod away from the recovery sprocket is passed through a protective compartment to the outside world.

[0020] By adopting the above technical scheme, by pulling the pull rod, when the sliding plate slides toward one side of the driving sprocket, the driven plate is separated from the multiple centrifugal bodies, and the multiple limit blocks are abutted against the driving sprocket, so as to limit the rotation of the driving sprocket, and at the same time, the recovery sprocket is meshed with the saw chain, and the saw chain in the storage chamber is limited by the driving sprocket and the recovery sprocket. At this time, the recovery sprocket can be rotated by rotating the pull rod, and the saw chain can be recovered into the storage chamber, which is convenient for the recovery of the saw chain, thereby facilitating the replacement of the saw chain; when the sliding plate slides toward the side away from the driving sprocket, the driven plate wraps the multiple centrifugal bodies, further limiting the position of the protection bin, the limit block is separated from the driving sprocket and the recovery sprocket is separated from the saw chain, and the limitation of the saw chain in the storage chamber is released. At this time, the driven sprocket is moved out of the storage chamber to the slide rail of the guide plate, and the saw chain can be moved out of the storage chamber to the slide rail of the guide plate, thereby completing the installation of the saw chain, which is convenient for replacing the saw chain.

[0021] Preferably, the sliding plate is provided with a placement opening, and when the driven sprocket is located in the storage cavity, the driven sprocket is detachably connected to the placement opening.

[0022] By adopting the above technical solution, the position of the driven sprocket in the receiving chamber is limited, thereby reducing the possibility of the driven sprocket moving in the receiving chamber.

[0023] Preferably, a force handle is provided at the end of the pull rod away from the recovery sprocket, a clamping block is provided on the force handle, a clamping groove is provided on the protection bin, and a matching opening is provided on the clamping groove, when the recovery sprocket slides toward the side away from the saw chain, the clamping block moves into the clamping groove through the matching opening and can move in the clamping groove.

[0024] By adopting the above technical solution and providing a force application handle, it is convenient to apply force to the pull rod, thereby facilitating the replacement of the saw chain. At the same time, by providing a clamping block and a clamping groove, the position of the sliding plate is limited, reducing the possibility of displacement of the sliding plate.

[0025] The technical effects of the present invention are mainly reflected in the following aspects: 1. The present invention provides a replacement mechanism. When the saw chain placed on the guide plate is worn, the driven sprocket on the guide plate and the worn saw chain can be collected into the storage chamber, so as to reduce the damage to the saw chain and facilitate subsequent repair; the protection chamber is rotated to align the outlet corresponding to the other storage chamber with the guide plate, and the driven sprocket in the other storage chamber is slid along the guide rail to the side away from the protection chamber to the end and locked, so as to complete the replacement of the saw chain; the saw chain can be quickly replaced outdoors or without professional tools. When the chain saw is not in use, the saw chain on the guide plate can be stored in the storage chamber to protect the saw chain and reduce the possibility of wear of the saw chain when it is not in use; 2. The present invention provides a centrifugal body and a driven plate, and when the protection chamber is rotated until any driven plate is coaxial with the output shaft of the chain saw body, the driven plate is driven by the driving member toward the side of the centrifugal body until the multiple centrifugal bodies are wrapped therein. Because of the tension of the tension spring, the multiple centrifugal bodies do not contact the side wall of the driven plate. When the output shaft of the chain saw body rotates, the multiple centrifugal bodies rotate with the output shaft of the chain saw body. As the speed increases, centrifugal force is generated to make these centrifugal bodies abut against the side wall of the driven plate, and friction force is generated to make the driven plate rotate together with it. Therefore, power is transmitted to the driving sprocket through the chain saw body, so that the driving sprocket drives the saw chain to move; when the output shaft speed of the chain saw body drops to a certain speed, the centrifugal force decreases, and the tension of the tension spring separates the centrifugal body from the driven plate, so that one side of the driven plate is not affected by the braking load of the chain saw body; When the sliding plate slides toward the side away from the driving sprocket, the driven plate wraps around the plurality of centrifugal bodies to further limit the position of the protection bin, the limiting block is separated from the driving sprocket and the recovery sprocket is separated from the saw chain, and the limiting of the saw chain in the storage chamber is released. At this time, the driven sprocket is moved out of the storage chamber to the slide rail of the guide plate, and the saw chain can be moved out of the storage chamber to the slide rail of the guide plate, thereby completing the installation of the saw chain and facilitating the replacement of the saw chain. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0027] Figure 2 It is a schematic diagram of the structure of the replacement mechanism of the embodiment of the present application.

[0028] Figure 3 It is a schematic diagram of the structure of the recycling component of the embodiment of the present application.

[0029] Figure 4 It is a schematic diagram of the main structure of the chainsaw according to the embodiment of the present application.

[0030] Figure 5 is along Figure 4 Enlarged view of point A in the middle.

[0031] Figure 6 is along Figure 4 Enlarged view of point B in the middle.

[0032] Figure 7 The present invention is a schematic diagram of the structure of the protection chamber according to an embodiment of the present invention.

[0033] Figure 8 It is a schematic diagram of the driving mechanism structure of an embodiment of the present application.

[0034] Fig. 9 It is a schematic diagram of the storage cavity structure of an embodiment of the present application.

[0035] Fig.10 It is a schematic diagram of the structure of the movable plate of an embodiment of the present application.

[0036] Explanation of reference numerals: 1. Chainsaw body; 11. Fixed shaft; 12. First bearing; 13. Centrifugal body; 14. Tension spring; 15. Clamping groove; 16. Matching opening; 2. Saw chain; 3. Guide plate; 31. Fixed plate; 32. Moving plate; 33. Guide block; 34. Light spring; 35. Gap; 36. Slide rail; 4. Replacement mechanism; 41. Protective compartment; 411. Rotation opening; 412. Protective cover; 413. Matching groove; 42. Storage cavity; 43, outlet; 44, driving sprocket; 45, driven sprocket; 451, second bearing; 452, internal threaded shaft; 453, threaded column; 454, friction block; 455, force block; 5, driving mechanism; 51, driven disk; 52, square shaft; 6, recovery assembly; 61, recovery sprocket; 62, limit block; 7, driving member; 71, sliding plate; 72, pull rod; 73, force handle; 74, clamping block; 75, placement port. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-Figure 10 The present application is further described in detail to make the technical solution of the present application easier to understand and grasp.

[0038] The embodiment of the present application discloses a chain saw with a replaceable saw chain.

[0039] Reference Figure 1 and Figure 2The present embodiment is a chain saw with replaceable saw chain, comprising a chain saw body 1, to which a guide plate 3 is fixedly connected, a replacement mechanism 4 and a driving mechanism 5, wherein the replacement mechanism 4 is used to replace the saw chain 2 on the guide plate 3, and the replacement mechanism 4 comprises a protection bin 41 with a plurality of storage chambers 42 and a plurality of saw chains 2, wherein the protection bin 41 is rotatably connected to the chain saw body 1, and a plurality of outlets 43 are respectively opened in the protection bin 41, and the plurality of outlets 43 are respectively connected to the plurality of storage chambers 42, and the plurality of storage chambers 42 are respectively connected to the plurality of storage chambers 42. 2 are rotatably connected with driving sprockets 44, and the driving mechanisms 5 are used to drive the rotation of the driving sprockets 44 respectively. The plurality of storage chambers 42 are movably connected with driven sprockets 45 respectively. The plurality of saw chains 2 correspond to the plurality of storage chambers 42 respectively. The plurality of saw chains 2 are meshedly connected with the driving sprockets 44 and the driven sprockets 45 of the corresponding storage chambers 42 respectively. When the outlet 43 corresponding to the storage chamber 42 faces 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.

[0040] Reference Figure 1 and Figure 2 By setting up the replacement mechanism 4, when the saw chain 2 placed on the guide bar 3 is worn, the driven sprocket 45 on the guide bar 3 and the worn saw chain 2 can be collected into the storage chamber 42, so as to reduce the further damage of the saw chain 2 and facilitate subsequent repair; the protection chamber 41 is rotated to align the outlet 43 corresponding to the other storage chamber 42 with the guide bar 3, and the driven sprocket 45 in the other storage chamber 42 is slid along the guide rail to the side away from the protection chamber 41 to the end and locked, so as to complete the replacement of the saw chain 2; it is convenient to quickly replace the saw chain outdoors or without professional tools. At the same time, when the oil saw is not in use, the saw chain 2 on the guide bar 3 can be stored in the storage chamber 42 to protect the saw chain 2 and reduce the possibility of wear of the saw chain 2 when not in use.

[0041] Reference Figure 3 and Figure 4 , further comprising a first bearing 12, a fixed shaft 11 is fixedly connected to the chain saw body 1, a rotation opening 411 is provided on the protection bin 41, the outer ring of the first bearing 12 is coaxial and fixedly connected to the rotation opening 411, and the inner ring of the first bearing 12 is detachably connected to the fixed shaft 11. The inner ring of the first bearing 12 is sleeved and fixed on the fixed shaft 11, and the installation of the protection bin 41 is completed, so that the protection bin 41 is rotatably connected to the chain saw body 1, and when the saw chain 2 on the guide plate 3 needs to be replaced, the protection bin 41 is rotated along the axial direction of the fixed shaft 11 through the relative rotation of the inner ring and the outer ring of the first bearing 12.

[0042] 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 chain saw body 1. The movable plate 32 is slidably connected to the fixed plate 31 along the axial direction of the driving 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 plurality of guide blocks 33 are fixedly connected to the fixed plate 31. The ends of the plurality of guide blocks 33 away from the fixed plate 31 are respectively penetrated by the movable plate 32, so that the movable plate 32 is slidably connected to the guide blocks 33. Light springs 34 are respectively sleeved on the plurality of guide blocks 33. The two ends of the light springs 34 are respectively abutted on the fixed plate 31 and the movable plate 32. The light springs 34 always drive the movable plate 32 to slide toward the side away from the fixed plate 31. When the movable plate 32 slides to the limit position toward 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 toward the side away from the fixed plate 31, the gap 35 between the movable plate 32 and the fixed plate 31 becomes larger, 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 recovered into the storage cavity 42; when the movable plate 32 moves to the side of the fixed plate 31 to the extreme position, the gap 35 between the movable plate 32 and the fixed plate 31 limits the saw chain 2 on the guide plate 3.

[0043] 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 internally threaded shaft 452, one end of the internally threaded shaft 452 in the axial direction is fixedly connected to a friction block 454, and the other end of the internally threaded shaft 452 in the axial direction is coaxially and threadedly connected to a threaded column 453, and one end of the threaded column 453 in the axial direction away from the internally threaded shaft 452 is fixedly connected to a force block 455. When the driven sprocket 45 is set on the guide plate 3, the friction block 454 and the force block 455 are respectively abutted against the fixed plate 31 and the sliding plate 71.

[0044] Reference Figure 2 and Figure 3The threaded column 453 is rotated by applying force to the force block 455, and the threaded column 453 is moved along the axial direction of the internal threaded shaft 452 through the threaded connection between the threaded column 453 and the internal threaded shaft 452. When the threaded column 453 moves to the point where the friction block 454 and the force block 455 abut against the fixed plate 31 and the sliding plate 71 respectively, the position of the internal threaded shaft 452 is adjusted by the friction between the friction block 454 and the force block 455 and the fixed plate 31 and the sliding plate 71. The driven sprocket 45 is limited in position on the guide plate 3, 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 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.

[0045] Reference Figure 7 and Figure 8 A plurality of protective covers 412 are rotatably connected to the protective bin 41. The plurality of protective covers 412 correspond to the plurality of outlets 43 respectively. The protective bin 41 is provided with matching grooves 413 that can be engaged with the protective covers 412. When the protective covers 412 rotate to the extreme position toward the outlet 43, the protective covers 412 shield the outlet 43. When the protective covers 412 rotate toward the side away from the outlet 43, the protective covers 412 match the matching grooves 413. When the protective covers 412 cover the outlet 43, the storage chamber 42 is sealed, reducing the possibility of foreign impurities entering the storage chamber 42 and causing wear to the saw chain 2 in the storage chamber 42; when the protective covers 412 rotate to match the matching grooves 413, the debris generated by cutting is guided and the operator is protected, reducing the possibility of safety hazards caused by cutting splashes to the operator.

[0046] Reference Figure 4 , Figure 5 , Figure 8 and Fig. 9The driving mechanism 5 includes a plurality of driven disks 51, a plurality of square shafts 52 and a driving member 7. The plurality of driven disks 51 and the plurality of square shafts 52 correspond to the plurality of driving sprockets 44 respectively. The plurality of square shafts 52 are coaxially and slidably connected to the corresponding driving sprockets 44 along the axial direction of the driving sprocket 44 respectively. The plurality of driven disks 51 are coaxially and fixedly connected to the corresponding square shafts 52 respectively. A plurality of centrifugal bodies 13 are hingedly connected to the output shaft of the chain saw body 1 along the axial direction of the output shaft thereof. Tension springs 14 are respectively installed on the plurality of centrifugal bodies 13. The two ends of the tension springs 14 are respectively fixedly connected to the centrifugal bodies 13 and the output shaft of the chain saw body 1. The plurality of tension springs 14 always drive the plurality of centrifugal bodies 13 to rotate toward one side of the output shaft of the chain saw body 1. The driving member 7 is used to drive the sliding of the driven disk 51. When any driven disk 51 slides toward one side of the chain saw body 1 to the limit position, the driven disk 51 wraps the plurality of centrifugal bodies 13 therein.

[0047] Reference Figure 4 , Figure 5 , Figure 8 and Fig. 9 , when the protection bin 41 is rotated until any driven disk 51 is coaxial with the output shaft of the chain saw body 1, the driven disk 51 is driven by the driving member 7 toward the side of the centrifugal body 13 until the multiple centrifugal bodies 13 are wrapped inside. Because of the tension of the tension spring 14, the multiple centrifugal bodies 13 do not contact the side wall of the driven disk 51. When the output shaft of the chain saw body 1 rotates, the multiple centrifugal bodies 13 rotate with the output shaft of the chain saw body 1. As the speed increases, centrifugal force is generated to make these centrifugal bodies 13 abut against the side wall of the driven disk 51, and friction force is generated to make the driven plate rotate with it. Therefore, power is transmitted to the active sprocket 44 through the chain saw body 1, so that the active sprocket 44 drives the saw chain 2 to move; when the output shaft speed of the chain saw body 1 drops to a certain speed, the centrifugal force decreases, and the tension of the tension spring 14 separates the centrifugal body 13 from the driven disk 51, so one side of the driven disk 51 is not affected by the braking load of the chain saw body 1.

[0048] Reference Figure 3 and Figure 7 , and also includes a recovery component 6, which is used to retract the saw chain 2 into the protection bin 41. The recovery component 6 includes a recovery sprocket 61 and a plurality of limit blocks 62. The recovery sprocket 61 is rotatably connected to the storage chamber 42 along the axial direction of the driving sprocket 44, and the recovery sprocket 61 is slidably connected to the storage chamber 42 along the axial direction of the driving sprocket 44. The plurality of limit blocks 62 are respectively slidably connected to the storage chamber 42 along the sliding direction of the recovery sprocket 61. The driving member 7 is simultaneously used to drive the recovery sprocket 61 and the limit blocks 62 to slide. When the driven disk 51 is separated from the plurality of centrifugal bodies 13, the recovery sprocket 61 slides toward the side of the saw chain 2 until it is meshed with the saw chain 2, and the plurality of limit blocks 62 simultaneously slide toward the side of the driving sprocket 44 until they abut against the driving sprocket 44.

[0049] Reference Figure 3 and Figure 7 When the recovery sprocket 61 is slid to engage with the saw chain 2 and the driving sprocket 44 remains in the limited state, 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 to the storage chamber 42, and the driven sprocket 45 is pulled by the saw chain 2 to slide along the slide rail 36 and recovered into the storage chamber 42, so as to facilitate the recovery and replacement of the saw chain 2.

[0050] Reference Fig. 9 and Fig.10 The driving member 7 includes a sliding plate 71 and a pull rod 72. The sliding plate 71 is slidably connected in the storage cavity 42 along the axial direction of the active 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. A plurality of limit blocks 62 are respectively fixedly connected to the sliding plate 71. The pull rod 72 is coaxially and fixedly connected to the recovery sprocket 61, and the end of the pull rod 72 away from the recovery sprocket 61 is penetrated through the protection compartment 41 to the outside.

[0051] Reference Fig. 9 and Fig.10 By pulling the pull rod 72, when the sliding plate 71 slides toward the side of the driving sprocket 44, the driven plate 51 is separated from the multiple centrifugal bodies 13, and the multiple limit blocks 62 are abutted against the driving sprocket 44, so that the rotation of the driving sprocket 44 is limited, and at the same time, the recovery sprocket 61 is engaged with the saw chain 2, and the saw chain 2 in the storage chamber 42 is limited by the driving sprocket 44 and the recovery sprocket 61. At this time, by rotating the pull rod 72 to rotate the recovery sprocket 61, the saw chain 2 can be recovered into the storage chamber 42, which is convenient for the recovery of the saw chain 2, thereby facilitating The saw chain 2 is replaced; when the sliding plate 71 slides toward the side away from the driving sprocket 44, the driven disk 51 wraps the multiple centrifugal bodies 13, further limiting the position of the protection bin 41, the limiting block 62 disengages from the driving sprocket 44 and the recovery sprocket 61 disengages from the saw chain 2, releasing the limit on the saw chain 2 in the storage chamber 42, and at this time the driven sprocket 45 is moved out of the storage chamber 42 to the slide rail 36 of the guide plate 3, and at the same time the saw chain 2 can be moved out of the storage chamber 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.

[0052] Reference Fig. 9 and Fig.10The sliding plate 71 is provided with a placement opening 75. When the driven sprocket 45 is located in the receiving chamber 42, the driven sprocket 45 is detachably connected to the placement opening 75, that is, the internal threaded shaft 452 is located in the placement opening 75, and the threaded column 453 moves to the force block 455 and the friction block 454 abut against the side surfaces of the sliding plate 71. The position of the driven sprocket 45 in the receiving chamber 42 is limited to reduce the possibility of the driven sprocket 45 moving in the receiving chamber 42, which is convenient for replacing the saw chain 2 on the chain saw and reduces the possibility of wear of the driven sprocket 45.

[0053] Reference Figure 2 , Fig. 9 and Fig.10 The end of the pull rod 72 away from the recovery sprocket 61 is fixedly connected with a force-applying handle 73, and the force-applying handle 73 is fixedly connected with a clamping block 74. The protection bin 41 is provided with a clamping groove 15, and the clamping groove 15 is provided with a matching opening 16. When the recovery sprocket 61 slides toward the side away from the saw chain 2, the clamping block 74 moves into the clamping groove 15 through the matching opening 16 and can move in the clamping groove 15. By providing the force-applying handle 73, it is convenient to apply force to the pull rod 72, thereby facilitating the replacement of the saw chain 2. At the same time, by providing the clamping block 74 and the clamping groove 15, the position of the sliding plate 71 is limited, reducing the possibility of displacement of the sliding plate 71.

[0054] Of course, the above are only typical examples of the present application. In addition, the present application may have many other specific implementation methods. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present application.

Claims

1. A chain replaceable chain saw, comprising a chain saw body (1), wherein a guide plate (3) is provided on the chain saw body (1), and wherein: The invention also comprises a replacement mechanism (4) and a driving mechanism (5), wherein the replacement mechanism (4) is used to replace the saw chain (2) on the guide plate (3), and the replacement mechanism (4) comprises a protection bin (41) with a plurality of storage chambers (42) and a plurality of saw chains (2), wherein the protection bin (41) is rotatably connected to the chain saw body (1), and a plurality of outlets (43) are respectively provided in the protection bin (41), and the plurality of outlets (43) are respectively connected to the plurality of storage chambers (42), and the plurality of storage chambers (42) are respectively rotatably connected to driving sprockets (44), and the driving mechanism (5) is provided in the plurality of storage chambers (42). The mechanism (5) is used to drive the driving sprocket (44) to rotate respectively, and a plurality of the storage chambers (42) are movably connected with driven sprockets (45), and a plurality of the saw chains (2) correspond to the plurality of storage chambers (42), and a plurality of the saw chains (2) are meshedly connected with the driving sprocket (44) and the driven sprocket (45) of the corresponding storage chambers (42). When the outlet (43) corresponding to the storage chamber (42) faces 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).

2. The chain replaceable oil saw according to claim 1, characterized in that: It also comprises a first bearing (12), a fixed shaft (11) is provided on the chain saw body (1), a rotating opening (411) is provided on the protection bin (41), an outer ring of the first bearing (12) is coaxially and fixedly connected to the rotating opening (411), and an inner ring of the first bearing (12) is detachably connected to the fixed shaft (11).

3. The chain replaceable oil saw according to claim 1, characterized in that: The guide plate (3) comprises a fixed plate (31) and a movable plate (32), wherein the fixed plate (31) is fixedly connected to the chain saw body (1), and the movable plate (32) is slidably connected to the fixed plate (31) along the axial direction of the driving sprocket (44), and a gap (35) is provided between the movable plate (32) and the fixed plate (31) for a driven sprocket (45) to pass through and rotate, and a light spring (34) is provided on the movable plate (32), and the light spring (34) always drives the movable plate (32) to slide toward a side away from the fixed plate (31); when the movable plate (32) slides toward the fixed plate (31) to an extreme position, the gap (35) can limit the position of the saw chain (2) on the guide plate (3).

4. The chain replaceable oil saw according to claim 3, 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 with an internal threaded shaft (452), one end of the internal threaded shaft (452) in the axial direction is provided with a friction block (454), and the other end of the internal threaded shaft (452) in the axial direction is coaxially and threadedly connected with a threaded column (453), and the end of the threaded column (453) in the axial direction away from the internal threaded shaft (452) is provided with a force block (455), when the driven sprocket (455) is arranged on the guide plate (3), the friction block (454) and the force block (455) are respectively abutted against the fixed plate (31) and the sliding plate (71).

5. The chain replaceable oil saw according to claim 1, characterized in that: The protection bin (41) is rotatably connected with a plurality of protection covers (412), and the plurality of protection covers (412) respectively correspond to a plurality of outlets (43). The protection bin (41) is respectively provided with matching grooves (413) that can be snap-fitted with the protection covers (412). When the protection covers (412) are rotated toward the outlet (43) to an extreme position, the protection covers (412) shield the outlet (43); when the protection covers (412) are rotated toward a side away from the outlet (43), the protection covers (412) are matched with the matching grooves (413).

6. The chain replaceable oil saw according to claim 1, characterized in that: The driving mechanism (5) comprises a plurality of driven disks (51), a plurality of square shafts (52) and a driving member (7); the plurality of driven disks (51) and the plurality of square shafts (52) respectively correspond to a plurality of driving sprockets (44); the plurality of square shafts (52) are respectively coaxially and slidably connected to the corresponding driving sprockets (44) along the axial direction of the driving sprockets (44); the plurality of driven disks (51) are respectively coaxially and fixedly connected to the corresponding square shafts (52); the output of the chain saw body (1) A plurality of centrifugal bodies (13) are hingedly connected to the shaft along the axial direction of the output shaft, and a tension spring (14) is provided on each of the plurality of centrifugal bodies (13). The plurality of tension springs (14) always drive the plurality of centrifugal bodies (13) to rotate toward the output shaft of the chain saw body (1). The driving member (7) is used to drive the sliding of the driven disk (51). When any driven disk (51) slides toward the chain saw body (1) to an extreme position, the driven disk (51) wraps the plurality of centrifugal bodies (13) therein.

7. The chain replaceable oil saw according to claim 6, characterized in that: The saw chain (2) is also provided with a recovery assembly (6), the recovery assembly (6) being used for recovering the saw chain (2) into the protection chamber (41), the recovery assembly (6) comprising a recovery sprocket (61) and a plurality of stop blocks (62), the recovery sprocket (61) being rotatably connected in the storage chamber (42) along the axis direction of the driving sprocket (44), and the recovery sprocket (61) being slidably connected in the storage chamber (42) along the axis direction of the driving sprocket (44), and the plurality of stop blocks (62) being connected in the storage chamber (42) ) are respectively connected in a sliding direction of the recovery sprocket (61) in the storage chamber (42), and the driving member (7) is used to drive the recovery sprocket (61) and the limit block (62) to slide. When the driven disk (51) is separated from the plurality of centrifugal bodies (13), the recovery sprocket (61) slides toward the side of the saw chain (2) until it meshes with the saw chain (2), and the plurality of limit blocks (62) simultaneously slide toward the side of the driving sprocket (44) until they abut against the driving sprocket (44).

8. The chain replaceable oil saw according to claim 7, characterized in that: The driving member (7) includes a sliding plate (71) and a pulling rod (72); the sliding plate (71) is slidably connected in the storage cavity (42) along the axial direction of the driving sprocket (44); the pulling rod (72) is rotatably connected to the sliding plate (71); the recovery sprocket (61) is rotatably connected to the sliding plate (71); a plurality of limit blocks (62) are respectively fixedly connected to the sliding plate (71); the pulling rod (72) is coaxially and fixedly connected to the recovery sprocket (61); and one end of the pulling rod (72) away from the recovery sprocket (61) is passed through a protective bin (41) to the outside.

9. The chain replaceable oil saw according to claim 8, characterized in that: The sliding plate (71) is provided with a placement opening (75), and when the driven sprocket (45) is located in the storage cavity (42), the driven sprocket (45) is detachably connected to the placement opening (75).

10. The chain replaceable oil saw according to claim 8, characterized in that: A force-applying handle (73) is provided at one end of the pull rod (72) away from the recovery sprocket (61), and a clamping block (74) is provided on the force-applying handle (73). A clamping groove (15) is provided on the protection bin (41), and a matching opening (16) is provided on the clamping groove (15). When the recovery sprocket (61) slides toward the side away from the saw chain (2), the clamping block (74) moves into the clamping groove (15) through the matching opening (16) and can move in the clamping groove (15).

Images