Electric cutting tool

Abstract

The utility model relates to the technical field of cutting devices, and discloses an electric cutting tool. According to the electric cutting tool, the first power mechanism comprises the first output shaft, the first output shaft is arranged to be used for installing and driving the saw blade to implement cutting, the second power mechanism comprises the second output shaft, the first output shaft drives the second output shaft through the transmission assembly, and the second output shaft drives the chain to implement cutting. The first output shaft for driving the saw blade to carry out cutting and the second output shaft for driving the chain to carry out cutting are two independent parts and are not integrated parts, when the chain saw accessory is installed, the angle of the depth adjusting mechanism does not need to be increased, and then a handle of the electric cutting tool does not need to be lifted, so that the comfort degree of a user holding the handle in the cutting process is improved; and the cutting effect is not influenced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cutting devices, in particular to an electric cutting tool. BACKGROUND

[0002] A circular saw has good cutting precision, but the cutting depth is shallow. A chain saw has a deep cutting depth, but the cutting precision is generally poor. In order to balance the cutting precision and the cutting depth during cutting operation, a user generally needs to equip with both a circular saw and a chain saw, thereby increasing the relevant cost and being inconvenient. SUMMARY

[0003] An object of the present application is to solve or at least alleviate part or all of the above problems. To this end, the present application provides an electric cutting tool. In order to achieve the above object, the present application adopts the following technical solutions:

[0004] An electric cutting tool, comprising: a housing, and a bottom plate rotationally connected with the housing; a saw blade, and a first power mechanism at least partially accommodated in the housing, the first power mechanism comprising a first output shaft, the first output shaft being configured to mount and drive the saw blade to perform cutting; wherein the electric cutting tool further comprises a chain saw accessory detachably connected with the electric cutting tool; the chain saw accessory comprising a guide plate, a chain arranged around the guide plate, and a second power mechanism; the second power mechanism comprising a second output shaft and a transmission assembly, the first output shaft driving the second output shaft through the transmission assembly, the second output shaft driving the chain to perform cutting.

[0005] In some embodiments, the first output shaft rotates around a first axis, the second output shaft rotates around a second axis, and the first axis is not collinear with the second axis.

[0006] In some embodiments, the second output shaft is located above the first output shaft.

[0007] In some embodiments, the second output shaft is parallel to the first output shaft.

[0008] In some embodiments, the transmission assembly comprises a first gear and a second gear, the first gear is arranged on the first output shaft, the second gear is arranged on the second output shaft, the second gear is engaged with the first gear, the second output shaft is provided with a sprocket, and the chain is arranged around the sprocket.

[0009] In some embodiments, the transmission assembly comprises an adapter connecting the first output shaft and the second output shaft.

[0010] In some embodiments, the first output shaft rotates around a first axis, the second output shaft rotates around a second axis, and the first axis is collinear with the second axis.

[0011] In some embodiments, the first power mechanism further comprises a driving motor, a motor shaft of the driving motor, the first output shaft and the second output shaft are parallel to each other.

[0012] In some embodiments, the chain saw accessory further comprises a base, a rotating connecting piece and a mounting bracket, the rotating connecting piece is rotatably connected with the base, the rotating connecting piece is rotatably connected with the mounting bracket, and the mounting bracket is used to be connected with the depth adjustment mechanism of the electric cutting tool.

[0013] In some embodiments, the depth adjustment mechanism has a waist-shaped hole, and the mounting bracket is connected with the depth adjustment mechanism through the mounting screw and the waist-shaped hole.

[0014] In some embodiments, the electric cutting tool further comprises an oil supply device, the oil supply device comprises an oil pot, an oil delivery pipe and an oil pump, and the oil pump delivers lubricating oil in the oil pot to the vicinity of the chain through the oil delivery pipe when the chain implements cutting.

[0015] An electric cutting tool, comprising: a casing, and a bottom plate rotatably connected with the casing; a saw blade, and a first power mechanism at least partially accommodated in the casing, the first power mechanism comprising a first output shaft arranged to mount and drive the saw blade to implement cutting; wherein the electric cutting tool further comprises a chain saw accessory detachably connected with the electric cutting tool; the chain saw accessory comprising a guide plate, a chain arranged around the guide plate, and a second power mechanism; the second power mechanism comprising a second output shaft arranged to mount and drive the chain to implement cutting, and the first output shaft and the second output shaft are not collinear.

[0016] An electric cutting tool, comprising: a casing, a bottom plate and a depth adjustment mechanism; the depth adjustment mechanism is used to adjust the angle of the bottom plate relative to the casing about a third axis, the electric cutting tool has a first state, and the angle adjustment value of the depth adjustment mechanism in the first state is the smallest; a saw blade and a first power mechanism at least partially accommodated in the casing, the first power mechanism drives the saw blade to implement cutting; wherein the electric cutting tool further comprises a chain saw accessory detachably connected with the electric cutting tool; the electric cutting tool further has a second state, the second state is the state after the chain saw accessory is mounted to the electric cutting tool, and the change amount of the angle adjustment value of the depth adjustment mechanism in the second state relative to the first state is less than or equal to 30°.

[0017] In some embodiments, the change amount of the angle adjustment value of the depth adjustment mechanism in the second state relative to the first state is greater than or equal to 5° and less than or equal to 15°.

[0018] In some embodiments, the casing is provided with a handle, and the change amount of the included angle between the handle holding axis and the bottom plate in the second state relative to the first state is less than or equal to 20°.

[0019] In some embodiments, the chain saw accessory comprises a guide plate, a chain arranged around the guide plate, and a second power mechanism; the second power mechanism comprises a second output shaft and a transmission assembly, the first power mechanism comprises a first output shaft, the first output shaft drives the second output shaft through the transmission assembly, and the second output shaft drives the chain to perform cutting.

[0020] In some embodiments, the second output shaft is located above the first output shaft, and the ratio of the distance between the second output shaft and the first output shaft to the length of the guide plate is less than or equal to one-eighth.

[0021] In some embodiments, the chain saw accessory further comprises a base, and a tensioning mechanism arranged on the base and in contact with the chain, the tensioning mechanism being used to adjust the tightness of the chain.

[0022] In some embodiments, the chain saw accessory further comprises a base and a locking screw, the locking screw being connected to the first output shaft through the base.

[0023] In some embodiments, the chain saw accessory comprises a guide plate and a heel plate, the heel plate being arranged at the rear side of the guide plate and extending along the direction of the guide plate, and the end of the heel plate being formed with a limiting groove covering at least part of the guide plate.

[0024] In some embodiments, the end of the heel plate is connected with a heel plate fixing member, and the heel plate fixing member is provided with a limiting groove.

[0025] In some embodiments, the inner side of one groove wall of the limiting groove is provided with a boss, and the other groove wall of the limiting groove is provided with an abutting member, the abutting member being adjustable so that the guide plate is clamped between the boss and the abutting member.

[0026] An electric cutting tool comprises a housing, a bottom plate rotationally connected to the housing, a saw blade, and a first power mechanism at least partially accommodated in the housing, the first power mechanism driving the saw blade to perform cutting; wherein the electric cutting tool further comprises a chain saw accessory detachably connected to the electric cutting tool; the chain saw accessory comprises a guide plate, a chain arranged around the guide plate, and a second power mechanism, the second power mechanism driving the chain to perform cutting; and an oil supply device, the oil supply device comprising an oil tank, an oil delivery pipe, and an oil pump, the oil pump delivering lubricating oil in the oil tank to the vicinity of the chain through the oil delivery pipe when the chain performs cutting.

[0027] In some embodiments, the oil pump and the oil tank are respectively arranged on the inner and outer sides of the chain saw accessory relative to the housing.

[0028] In some embodiments, the second power mechanism comprises a second output shaft and a transmission assembly, the first power mechanism drives the second output shaft through the transmission assembly, and the second output shaft drives the chain to perform cutting, and the oil pump delivers lubricating oil in the oil tank to the vicinity of the chain through the oil delivery pipe when the second output shaft drives the chain to perform cutting.

[0029] In some embodiments, a worm is arranged on the second output shaft, and a worm wheel is arranged on the oil pump, the worm wheel meshes with the worm, and the oil pump is driven by the worm to deliver the lubricating oil in the oil canister to the chainsaw accessory through the oil delivery pipe.

[0030] In some embodiments, the transmission assembly includes a first gear and a second gear, the first gear is arranged on the first output shaft of the first power mechanism, and the second gear is arranged on the second output shaft and meshes with the first gear.

[0031] In some embodiments, the first power mechanism includes a first output shaft arranged to drive the saw blade to perform cutting, and the second power mechanism includes a second output shaft and a transmission assembly, the first output shaft drives the second output shaft through the transmission assembly, and the second output shaft drives the chain to perform cutting.

[0032] In some embodiments, the first power mechanism includes a first output shaft, and the saw blade is connected to the first output shaft through a flange screw.

[0033] In some embodiments, the electric cutting tool further includes a depth adjustment mechanism, the electric cutting tool has a first state and a second state, the angle adjustment value of the depth adjustment mechanism in the first state is the smallest, and the second state is a state after the chainsaw accessory is installed on the electric cutting tool, and the change amount of the angle adjustment value of the depth adjustment mechanism in the second state is less than or equal to 30° compared with that in the first state.

[0034] The electric cutting tool provided by the application has the following beneficial effects:

[0035] In the electric cutting tool provided by the application, the first output shaft for driving the saw blade to perform cutting and the second output shaft for driving the chain to perform cutting are two independent components rather than an integral component, so that when the chainsaw accessory is installed, the angle of the depth adjustment mechanism does not need to be increased, and the handle of the electric cutting tool does not need to be raised, thereby improving the comfort of the user holding the handle during cutting and not affecting the cutting effect.

[0036] In addition, in the electric cutting tool provided by the application, the oil supply device is arranged, the oil pump delivers the lubricating oil in the oil canister to the vicinity of the chain through the oil delivery pipe when the chain performs cutting, and the chain is lubricated, the oil pump is arranged to ensure continuous and stable oil delivery, and the lubricating oil will overflow to a designated position, so that the hands are not easy to be dirty and easy to be cleaned. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 is a structural schematic diagram of the electric cutting tool provided by the application;

[0038] Figure 2 is another structural schematic diagram of the electric cutting tool provided by the application;

[0039] Figure 3is a structural schematic view of the electric cutting tool provided by the present application, which is installed with the chain saw accessory;

[0040] Figure 4 is an exploded structural schematic view of the chain saw accessory and the electric cutting tool provided by the present application;

[0041] Figure 5 is a structural schematic view of the chain saw accessory provided by the present application;

[0042] Figure 6 is an exploded structural schematic view of the chain saw accessory provided by the present application;

[0043] Figure 7 is a structural schematic view of the transmission assembly provided by the present application;

[0044] Figure 8 is another structural schematic view of the transmission assembly provided by the present application;

[0045] Figure 9 is a structural schematic view of the first state of the electric cutting tool provided by the present application;

[0046] Figure 10 is a structural schematic view of the second state of the electric cutting tool provided by the present application;

[0047] Figure 11 is a structural schematic view of the first perspective of the oil supply device provided by the present application;

[0048] Figure 12 is a structural schematic view of the second perspective of the oil supply device provided by the present application;

[0049] Figure 13 is a structural schematic view of the first perspective of the heel plate provided by the present application;

[0050] Figure 14 is a structural schematic view of the second perspective of the heel plate provided by the present application;

[0051] Figure 15 is a structural schematic view of the third perspective of the heel plate provided by the present application.

[0052] In the drawings:

[0053] 1, housing; 2, bottom plate; 3, saw blade; 5, chain saw accessory; 6, depth adjustment mechanism; 7, oil supply device; 8, tensioning mechanism; 9, shaft locking mechanism; 10, handle;

[0054] 41, first output shaft; 42, movable guard;

[0055] 51, guide plate; 52, chain; 531, second output shaft; 532, transmission assembly; 5321, first gear; 5322, second gear; 533, sprocket; 534, adapter; 54, base; 541, base body; 542, cover plate; 55, rotating connecting piece; 56, mounting bracket; 57, heel plate; 58, heel plate fixing piece; 581, limiting groove; 582, boss; 59, abutting piece; 591, adjusting screw; 592, elastic piece; 593, reinforcing ring; 594, first buckle; 595, second buckle;

[0056] 71, oil can; 72, oil delivery pipe; 73, oil pump; 74, worm wheel; 75, worm;

[0057] 91, locking screw; 92, locking flange;

[0058] a, first axis; b, second axis; c, third axis. DETAILED DESCRIPTION

[0059] To make the technical problems solved by the present application, the technical solutions adopted and the technical effects reached more clear, the technical solutions of the embodiments of the present application will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of protection of the present application.

[0060] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0061] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0062] AsFigure 1 、 Figure 2 As shown in FIGS. 1-2, the present application provides an electric cutting tool, which comprises a housing 1, a bottom plate 2 rotatably connected with the housing 1, a saw blade 3 and a first power mechanism at least partially accommodated in the housing 1. The first power mechanism comprises a first output shaft 41, which is arranged to be mounted and drive the saw blade 3 to perform cutting. The saw blade 3 can be a circular saw blade, which has sharp teeth. The first power mechanism drives the saw blade 3 to rotate at a high speed to cut workpieces such as wood. Of course, the saw blade 3 is the most dangerous component in the whole machine. In order to protect the operator from the cutting area of the saw blade, a movable guard 42 is arranged on the housing 1. In the actual cutting process, the movable guard 42 can be rotated to be opened. After the cutting is completed, the movable guard 42 can be reset to shield the teeth of the saw blade 3 to avoid the operator from contacting. In some embodiments, the movable guard 42 has the function of being automatically opened after touching the workpiece and being automatically reset after the cutting is completed.

[0063] The bottom plate 2 is further connected with a depth adjustment mechanism 6, which is used to adjust the cutting depth of the saw blade 3. The bottom plate 2 is used to support and position the electric cutting tool, which is convenient for the operator to adjust the position of the electric cutting tool.

[0064] The saw blade 3 can be connected with the first output shaft 41 through flange screws. A wrench can be used to loosen or tighten the flange screws to realize the disassembly and assembly of the saw blade 3. The saw blade 3 is further provided with an inner flange and an outer flange on both sides. The flange screws are sequentially arranged through the outer flange, the saw blade and the inner flange to be connected with the first output shaft 41. The outer flange is used to press the saw blade, and the inner flange is used to support the saw blade.

[0065] As shown in FIGS. 1-2, the present application provides an electric cutting tool, which comprises a housing 1, a bottom plate 2 rotatably connected with the housing 1, a saw blade 3 and a first power mechanism at least partially accommodated in the housing 1. The first power mechanism comprises a first output shaft 41, which is arranged to be mounted and drive the saw blade 3 to perform cutting. The saw blade 3 can be a circular saw blade, which has sharp teeth. The first power mechanism drives the saw blade 3 to rotate at a high speed to cut workpieces such as wood. Of course, the saw blade 3 is the most dangerous component in the whole machine. In order to protect the operator from the cutting area of the saw blade, a movable guard 42 is arranged on the housing 1. In the actual cutting process, the movable guard 42 can be rotated to be opened. After the cutting is completed, the movable guard 42 can be reset to shield the teeth of the saw blade 3 to avoid the operator from contacting. In some embodiments, the movable guard 42 has the function of being automatically opened after touching the workpiece and being automatically reset after the cutting is completed. Figures 3 to 8As shown, the electric cutting tool provided by the application further comprises a chain saw accessory 5 which is detachably connected with the electric cutting tool to improve the cutting depth of the electric cutting tool. The chain saw accessory 5 comprises a guide plate 51, a chain 52 arranged around the guide plate 51, and a second power mechanism. The second power mechanism comprises a second output shaft 531 and a transmission assembly 532, the first output shaft 41 drives the second output shaft 531 through the transmission assembly 532, and the second output shaft 531 drives the chain 52 to perform cutting. In the foregoing, the first power mechanism comprises the first output shaft 41 which is arranged to be mounted and drive the saw blade 3 to perform cutting, and the second power mechanism comprises the second output shaft 531, after the saw blade 3 is detached and the chain saw accessory 5 is mounted, the first output shaft 41 drives the second output shaft 531 through the transmission assembly 532, and the second output shaft 531 drives the chain 52 to perform cutting. It should be noted that the first output shaft 41 which drives the saw blade 3 to perform cutting and the second output shaft 531 which drives the chain 52 to perform cutting are two independent components and are not an integral part, that is, the original electric cutting tool with the saw blade 3 mounted and the chain saw accessory 5 described above have independent output shafts. In the application, when the chain saw accessory 5 is mounted, the angle of the depth adjustment mechanism 6 does not need to be excessively increased, and the handle 10 of the electric cutting tool does not need to be excessively raised, thereby improving the comfort of the user holding the handle 10 during cutting, and balancing the cutting effect of improving the cutting accuracy, depth, and the like of the tool while taking into account the use feel.

[0066] The electric cutting tool provided by the application has a circular saw blade 3 and a chain saw accessory 5, the saw blade 3 has good cutting accuracy, the chain saw accessory 5 has a relatively deep cutting depth, the user can install the saw blade 3 or the chain saw accessory 5 according to the use requirement, which is convenient for the user to use and reduces the cost.

[0067] In some embodiments, the first output shaft 41 rotates around a first axis a, the second output shaft 531 rotates around a second axis b, the first axis a and the second axis b are not collinear, the chain saw accessory 5 can be mounted around the first output shaft 41 without excessively raising the handle of the circular saw, avoiding difficulty in exerting force during cutting, thereby improving the comfort of the user holding the handle 10 during cutting, and not affecting the cutting effect.

[0068] In some embodiments, the second output shaft 531 is located above the first output shaft 41, the space above the first output shaft 41 is fully utilized, the space between the first output shaft 41 and the bottom plate 2 is not occupied, the chain saw accessory 5 is facilitated to be mounted, and when the chain saw accessory 5 is mounted, the angle of the depth adjustment mechanism 6 does not need to be excessively increased, and the handle of the electric cutting tool does not need to be excessively raised, thereby improving the comfort of the user holding the handle 10 during cutting, and not affecting the cutting effect.

[0069] In some embodiments, the ratio of the distance between the second output shaft 531 and the first output shaft 41 to the length of the guide plate 51 is less than or equal to one-eighth, so that after the chain saw accessory 5 is installed on the electric cutting tool, the angle of the depth adjustment mechanism 6 is not excessively increased, and the handle 10 of the electric cutting tool does not need to be excessively raised, thereby improving the comfort of the user holding the handle 10 during cutting and not affecting the cutting effect.

[0070] In some embodiments, the second output shaft 531 is parallel to the first output shaft 41, which facilitates the arrangement of the transmission assembly 532 to transmit the driving force of the first output shaft 41 to the second output shaft 531. Optionally, the second output shaft 531 is arranged above the first output shaft 41.

[0071] The first power mechanism further comprises a driving motor, and the motor shaft of the driving motor, the first output shaft 41, and the second output shaft 531 are parallel to each other. The motor shaft of the driving motor is drivingly connected to the first output shaft 41, or the motor shaft of the driving motor and the first output shaft 41 are connected through a transmission member, which is not specifically limited here.

[0072] The transmission assembly 532 drivingly connects the first output shaft 41 and the second output shaft 531, and the transmission assembly 532 comprises a first gear 5321 and a second gear 5322. The first gear 5321 is arranged on the first output shaft 41, and the second gear 5322 is arranged on the second output shaft 531. The second gear 5322 is engaged with the first gear 5321. The second output shaft 531 is provided with a sprocket 533, and the chain 52 is arranged around the sprocket 533. The driving force of the first output shaft 41 is transmitted to the second gear 5322 through the first gear 5321, the second gear 5322 rotates to drive the second output shaft 531 to rotate, thereby driving the sprocket 533 to rotate. The sprocket 533 transmits the driving force to the chain 52, and the chain 52 rotates around the guide plate 51 to implement cutting. Of course, the transmission assembly 532 for transmitting power between the first output shaft 41 and the second output shaft 531 can also use other structures other than the first and second gears described above.

[0073] The chain saw accessory 5 further comprises a base 54, the transmission assembly 532 and the second output shaft 531 are mounted on the base 54. The base 54 comprises a base body 541 and a cover plate 542. The base body 541 is provided with a receiving groove for accommodating the first gear 5321 and the second gear 5322, and the cover plate 542 is provided on the base body 541 to enclose the first gear 5321 and the second gear 5322 in the receiving groove. In some embodiments, the receiving groove on the base body 541 serves as a gear box of the chain saw accessory 5, and the chain saw accessory 5 is further provided with a gear box cover outside the cover plate 542, which supports and limits the above-mentioned receiving groove. One end of the second output shaft 531 is rotatably connected to the base 54 in the receiving groove, and the other end of the second output shaft 531 is connected with a sprocket 533 outside the receiving groove. The second gear 5322 is arranged between the two ends of the second output shaft 531 in the receiving groove. The first gear 5321 is rotatably arranged in the receiving groove and engaged with the second gear 5322. One side of the base 54 is provided with an axle hole, the first output shaft 41 can be mounted on the first gear 5321 through the axle hole, and the first output shaft 41 is connected with the first output shaft 41 through a locking screw 91 passing through the other side of the base 54, thereby fixing the chain saw accessory 5 on the first output shaft 41. The outer side of the base 54 is further provided with a locking flange 92, and a gasket is arranged between the locking flange 92 and the base 54. The locking screw 91 passes through the locking flange 92 and the gasket and is connected with the first output shaft 41. The locking flange 92 plays a role in pressing the base 54 on the first output shaft 41, and the gasket plays a role in preventing loosening.

[0074] The base 54 is rotatably connected with a rotary connecting piece 55, the rotary connecting piece 55 is rotatably connected with a mounting bracket 56, and the mounting bracket 56 is used for connecting with the depth adjusting mechanism 6. The rotary connecting piece 55, the base 54 and the mounting bracket 56 are all in rotary connection, so that the width occupied by the rotary connecting piece 55 in the horizontal direction can be changed when the chain saw accessory 5 is mounted, thereby making the chain saw accessory 5 applicable to electric cutting tools of different sizes. The rotary connecting piece 55 is rotatably connected with the base 54 around a first rotation axis, and the mounting bracket 56 is rotatably connected with the rotary connecting piece 55 around a second rotation axis, and the first rotation axis is parallel to the second rotation axis.

[0075] The depth adjusting mechanism 6 is provided with a waist-shaped hole, and the mounting bracket 56 is connected with the depth adjusting mechanism 6 through mounting screws and the waist-shaped hole, thereby providing support for the installation of the chain saw accessory 5 to improve the cutting accuracy of the chain saw accessory 5. At the same time, the adjustment function of the depth adjusting mechanism 6 is borrowed to provide installation space for the chain saw accessory 5.

[0076] In other embodiments, as Figure 8As shown, the transmission assembly 532 is connected with the first output shaft 41 and the second output shaft 531, and the transmission assembly 532 comprises a connector 534, the connector 534 is connected with the first output shaft 41 and the second output shaft 531, and the driving force of the first output shaft 41 is transmitted to the second output shaft 531 through the connector 534. Similarly, the first output shaft 41 and the second output shaft 532 are still not integral, and are two independent output shafts.

[0077] In some embodiments, the first output shaft 41 rotates around a first axis, the second output shaft 531 rotates around a second axis, the first axis is collinear with the second axis, and the first output shaft 41 is connected with the second output shaft 531 through the connector 534. The connector 534 can be a shaft coupling. The connector 534 is rotatably arranged in the base 54, one end of the second output shaft 531 is fixedly connected with the connector 534, one end of the first output shaft 41 can be inserted into the connector 534, and the second output shaft 531 is fixed on the connector 534 through the locking screw 91. The connection structure simplifies the structure of the transmission assembly 532.

[0078] The base 54 is also provided with a tensioning mechanism 8, the tensioning mechanism 8 is in contact with the chain 52, and the tensioning mechanism 8 is used to adjust the tightness of the chain 52 to ensure the effective cutting of the electric cutting tool and ensure the cutting accuracy.

[0079] The depth adjustment mechanism 6 is used to adjust the angle of the bottom plate 2 rotating relative to the casing 1 around the third axis c, and the third axis c is as shown in Figure 4 When the saw blade 3 is installed on the electric cutting tool, the angle adjustment value of the depth adjustment mechanism 6 can be adjusted, and the rotation angle of the bottom plate 2 around the third axis c relative to the casing 1 is different under different angle adjustment values, thereby realizing the non-significant change of the cutting depth of the electric cutting tool. It is defined that the electric cutting tool has a first state, and the angle adjustment value of the depth adjustment mechanism 6 in the first state is the smallest, which is as shown in Figure 9 It is defined that the electric cutting tool also has a second state, which is the state after the chain saw accessory 5 is installed on the electric cutting tool. At this time, the angle adjustment value of the depth adjustment mechanism 6 can be a fixed value, and the increment of the angle adjustment value of the depth adjustment mechanism 6 in the second state is less than or equal to 30° than that in the first state. The angle of the electric cutting tool in the second state is as shown in Figure 10 The increment of the angle adjustment value of the depth adjustment mechanism 6 in the second state is the numerical value of α2 minus α1 than that in the first state. The angle adjustment value of the depth adjustment mechanism 6 in the first state is the smallest, and the increment of the angle adjustment value of the depth adjustment mechanism 6 in the second state is less than or equal to 30° than that in the first state. When the chain saw accessory 5 is installed, it is not necessary to cause the angle of the depth adjustment mechanism 6 to be excessively increased, and it is not necessary to excessively raise the handle of the circular saw, thereby improving the comfort of the user holding the handle during cutting, and not affecting the cutting effect.

[0080] In some embodiments, the angle adjustment value of the depth adjustment mechanism 6 in the second state is increased by an angle greater than or equal to 5° and less than or equal to 15° than in the first state.

[0081] In some embodiments, as shown in Figure 10 A handle 10 is provided on the housing 1 for a user to hold and operate the electric cutting tool. The angle between the holding axis of the handle 10 and the bottom plate 2 changes by an angle less than or equal to 20° in the second state than in the first state. After replacing the chain saw accessory 5, the user can hold the handle 10 comfortably without affecting the cutting effect.

[0082] As shown in Figure 11 and Figure 12 The electric cutting tool further comprises an oil supply device 7, which comprises an oil tank 71, an oil delivery pipe 72, and an oil pump 73. The oil pump 73 delivers lubricating oil in the oil tank 71 to the vicinity of the chain 52 through the oil delivery pipe 72 when the chain 52 is cutting. The oil pump 73 delivers lubricating oil in the oil tank to the vicinity of the chain 52 through the oil delivery pipe 72 when the chain 52 is cutting, lubricating the chain 52. The oil pump 73 ensures continuous and stable oil delivery, and the lubricating oil will overflow to the designated position, which is not easy to get dirty and is easy to clean.

[0083] The first power mechanism drives the second output shaft 531 through the transmission assembly 532, and the second output shaft 531 drives the chain 52 to cut. The oil pump 73 delivers lubricating oil in the oil tank 71 to the vicinity of the chain 52 through the oil delivery pipe 72 when the chain 52 is cutting. One driving force can achieve the cutting of the chain 52 and the delivery of lubricating oil to the vicinity of the chain 52.

[0084] The oil pump 73 can be arranged on the inner side of the chain saw accessory 5, and the oil tank 71 can be arranged on the outer side of the chain saw accessory 5. Arranging the oil pump 73 and the oil tank 71 on both sides of the chain saw accessory 5 makes full use of the space on both sides of the chain saw accessory 5, avoiding insufficient space caused by installation on one side to affect the installation of the chain saw accessory 5 on the electric cutting tool.

[0085] The oil pump 73 can be arranged on the inner side of the chain saw accessory 5, and the oil tank 71 can be arranged on the outer side of the chain saw accessory 5. Arranging the oil pump 73 and the oil tank 71 on both sides of the chain saw accessory 5 makes full use of the space on both sides of the chain saw accessory 5, avoiding insufficient space caused by installation on one side to affect the installation of the chain saw accessory 5 on the electric cutting tool. The end of the second output shaft 531 corresponding to the oil pump 73 extends out of the base 54. The second output shaft 531 is provided with a worm 75, and the oil pump 73 is provided with a worm wheel 74. The worm wheel 74 is engaged with the worm 75, and the oil pump 72 is driven by the worm wheel 74 and the worm 75 to deliver lubricating oil in the oil tank 71 to the chain saw accessory 5 through the oil delivery pipe 72. The oil pump 73 is a mechanical oil pump. The worm wheel 74 arranged on the oil pump 73 is driven to work, and the oil pump 73 works to suck out the lubricating oil in the oil tank 71. The lubricating oil enters the oil pump 73 through the oil inlet of the oil delivery pipe 72 and reaches the vicinity of the chain 52 through the oil outlet, lubricating the chain 52.

[0086] In the case that the oil outlet of the oil pump 73 is far away from the chain 52, a guide pipe can be connected to the oil outlet of the oil pump 73, and the oil outlet end of the guide pipe is arranged near the chain 52 to lubricate the chain 52. The worm 75, the worm wheel 74, the oil pump 73 and the sprocket 533 are arranged on the same side of the base 54, so that the driving structure of the oil pump 73 is simplified.

[0087] As shown in Figures 13 to 15 The chain saw accessory 5 further comprises a heel plate 57, which is arranged on the rear side of the guide plate 51 and extends along the direction of the guide plate 51. The end of the heel plate 57 is formed with a limiting groove 581 covering at least part of the guide plate 51. The heel plate 57 can protect the user. When the user holds the electric cutting tool, the heel plate 57 is arranged on the side close to the user to prevent the user on the rear side from being cut by the chain 52 during rotation of the chain 52. It can be understood that, in the working state, the front end of the chain 52 directly contacts the workpiece, and the chain 52 has a tendency to move towards the heel plate 57 due to the reaction force of the workpiece and the vibration of the chain 52. In order to effectively protect the heel plate 57 from being cut by the chain 52 and protect the safety of the user, it is necessary to ensure that a safe distance is maintained between the chain 52 and the heel plate 57 in the limit state. In addition, during the production and installation of the heel plate 57 and the guide plate 51, there may be unnecessary errors, which may cause the distance between the heel plate 57 and the guide plate 51 to be too small, thereby causing a safety hazard. Therefore, during installation of the heel plate 57, the heel plate 57 has a preset offset angle from the guide plate 51. In this embodiment, the guide plate 51 also has a preset angle from the heel plate 57.

[0088] The heel plate 57 extends along the direction of the guide plate 51. One end of the heel plate 57 is fixedly connected to the base 54. The end of the heel plate 57 is bent, and the heel plate 57 is in a J shape. The end of the heel plate 57 is connected to a heel plate fixing member 58. The heel plate fixing member 58 is provided with a limiting groove 581. The bent part of the end of the heel plate 57 is inserted into the limiting groove 581. The heel plate 57 is fixedly connected to the heel plate fixing member 58. Part of the guide plate 51 is arranged in the limiting groove 581. The limiting groove 581 is in communication with the outside, that is, a plurality of openings are arranged on the side wall of the heel plate fixing member 58. The openings are used to discharge the cutting chips and dust brought into the limiting groove 581 during cutting of the chain 52.

[0089] The inner side of one groove wall of the limiting groove 581 is provided with a boss 582, and the other groove wall of the limiting groove 581 is provided with an abutting piece 59. The abutting piece 59 can be adjusted so that the guide plate 51 is clamped between the boss 582 and the abutting piece 59, thereby reducing the shaking of the chain 52 during the cutting operation and ensuring that the cutting surface is flat and not skewed. The abutting piece 59 has two adjustment positions, i.e., a first position and a second position. When the abutting piece 59 is in the first position, the follow-up plate fixing piece 58 and the guide plate 51 are fixed as a whole through the abutting piece 59, thereby increasing the rigidity between the two and avoiding damage to the guide plate 51 or the follow-up plate 57 due to rigidity problems under the premise that the structure of the guide plate 51 or the follow-up plate 57 is relatively weak. When the abutting piece 59 is in the second position, the follow-up plate fixing piece 58 is separated from the guide plate 51, which facilitates the disassembly and maintenance of the guide plate 51 and the chain 52.

[0090] The abutting piece 59 includes an adjusting screw 591, an elastic piece 592, and a reinforcing ring 593. The side wall of the follow-up plate fixing piece 58 is provided with a mounting hole for the adjusting screw 591 to pass through. However, the follow-up plate fixing piece 58 has insufficient strength due to its thin material, so the reinforcing ring 593 is arranged to reinforce the strength of the area where the mounting hole is located. The reinforcing ring 593 passes through the mounting hole and is clamped on the hole wall of the mounting hole. One end of the reinforcing ring 593 is formed with a protruding portion, which makes the reinforcing ring 593 have an end face with a size larger than that of the mounting hole, so that the reinforcing ring 593 can only pass into the mounting hole from one end. The abutting piece 59 further includes a first buckle 594 for fixing the reinforcing ring 593. The reinforcing ring 593 has a first clamping groove matched with the first buckle 594. When the reinforcing ring 593 passes into the mounting hole, the first buckle 594 is buckled into the first clamping groove, and at this time the reinforcing ring 593 is limited in the mounting hole. The reinforcing ring 593 has a through hole for the adjusting screw 591 to pass through. The adjusting screw 591 has an external thread structure, and the through hole of the reinforcing ring 593 is formed with an internal thread structure. The external thread structure and the internal thread structure cooperate to adjust the position of the adjusting screw 591. Before the adjusting screw 591 passes through the through hole, an elastic piece 592 is also assembled. The elastic piece 592 causes a pre-tightening force to exist between the adjusting screw 591 and the reinforcing ring 593, thereby avoiding the adjusting screw 591 from coming off the reinforcing ring 593.

[0091] The abutting piece 59 further includes a second buckle 595. The adjusting screw 591 is provided with a second clamping groove. After the adjusting screw 591 passes through the through hole, the part of the adjusting screw 591 with the second clamping groove is placed in the limiting groove 581. The second buckle 595 is buckled in the second clamping groove, thereby further avoiding the adjusting screw 591 from loosening during use.

[0092] Obviously, the above embodiments of the present application are merely examples for clear illustration of the present application, and are not intended to limit the implementation modes of the present application. Based on the above description, other different forms of changes or variations can also be made by those skilled in the art. Here, all the implementation modes are not required or can not be exhausted. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. An electric cutting tool, characterized in that, The electric cutting tool comprises: a housing, and a bottom plate rotationally connected to the housing; a saw blade, and a first power mechanism at least partially accommodated in the housing, the first power mechanism comprising a first output shaft arranged to be mounted on and drive the saw blade to perform cutting; wherein the electric cutting tool further comprises a chain saw accessory detachably connected to the electric cutting tool; the chain saw accessory comprising a guide plate, a chain arranged around the guide plate, and a second power mechanism; the second power mechanism comprising a second output shaft and a transmission assembly, the first output shaft driving the second output shaft through the transmission assembly, the second output shaft driving the chain to perform cutting.

2. The electric cutting tool according to claim 1, characterized by The first output shaft rotates around a first axis, and the second output shaft rotates around a second axis, the first axis being non-collinear with the second axis.

3. The electrically powered cutting tool of claim 2, wherein, The second output shaft is located above the first output shaft.

4. The electric power cutting tool according to claim 2, wherein The second output shaft is parallel to the first output shaft.

5. The electrically powered cutting tool of claim 3, wherein, The ratio of the distance between the second output shaft and the first output shaft to the length of the guide plate is less than or equal to one sixth.

6. The electric power cutting tool according to claim 1, wherein The transmission assembly comprises a first gear arranged on the first output shaft and a second gear arranged on the second output shaft, the second gear being engaged with the first gear, the second output shaft being provided with a sprocket, and the chain being arranged around the sprocket.

7. The electric power cutting tool according to claim 1, wherein The transmission assembly comprises an adapter connecting the first output shaft and the second output shaft.

8. The electrically powered cutting tool of claim 7, wherein, The first output shaft rotates around a first axis, and the second output shaft rotates around a second axis, the first axis being collinear with the second axis.

9. The electric power cutting tool according to Claim 1, wherein The first power mechanism further comprises a driving motor, the motor shaft of the driving motor, the first output shaft, and the second output shaft being parallel to each other.

10. The electric power cutting tool according to Claim 1, wherein The chain saw accessory further comprises a base, a rotation connecting member rotationally connected to the base, and a mounting bracket rotationally connected to the rotation connecting member, the mounting bracket being used to connect with a depth adjustment mechanism of the electric cutting tool.

11. The electrically powered cutting tool of claim 10, wherein, The depth adjustment mechanism has a waist-shaped hole, and the mounting bracket is connected with the depth adjustment mechanism through mounting screws and the waist-shaped hole.

12. The electric power cutting tool according to Claim 1, wherein The electric cutting tool further comprises an oil supply device, the oil supply device comprising an oil pot, an oil delivery pipe, and an oil pump, the oil pump delivering lubricating oil in the oil pot to the vicinity of the chain through the oil delivery pipe when the chain performs cutting.

13. An electric cutting tool, characterized in that The electric cutting tool comprises: a housing, a bottom plate, and a depth adjustment mechanism; the depth adjustment mechanism being used to adjust the angle through which the bottom plate rotates relative to the housing about a third axis, the electric cutting tool having a first state, and the angle adjustment value of the depth adjustment mechanism in the first state being the smallest; a saw blade, and a first power mechanism at least partially accommodated in the housing, the first power mechanism driving the saw blade to perform cutting; wherein the electric cutting tool further comprises a chain saw accessory detachably connected to the electric cutting tool; The electric cutting tool also has a second state, which is a state after the chain saw attachment is installed to the electric cutting tool, and the change amount of the angle adjustment value of the depth adjustment mechanism in the second state is less than or equal to 30° compared with that in the first state.

14. The electrically powered cutting tool of claim 13, wherein, The handle is provided on the shell, and an included angle between a holding axis of the handle and the bottom plate in the second state is less than or equal to 30° compared with that in the first state.

15. The electrically powered cutting tool of claim 13, wherein, The chain saw attachment comprises a guide plate and a trailing plate, the trailing plate is arranged at a rear side of the guide plate, and the trailing plate extends along a direction of the guide plate, and an end of the trailing plate is formed with a limiting groove covering at least part of the guide plate.

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