Multi-functional power tool

Abstract

The present invention provides a multi-functional power tool, comprising: a motor; an output shaft; a transmission assembly connecting the motor and the output shaft, the transmission assembly including: a transmission bearing driven by the motor; a fork connected to the output shaft; a mounting device for mounting a working accessory, the mounting device being connected to the output shaft, the mounting device having a working state and a mounting state; a holding mechanism having a holding state capable of providing a holding force for keeping the mounting device in the mounting state; the mounting device includes a first mounting member and a second mounting member that cooperate with each other to fix a working accessory, wherein the first mounting member is operated to rotate relative to the second mounting member about a first axis by a preset angle, triggering the holding mechanism to release the holding force provided to the mounting device so that the mounting device is switched from the mounting state to the working state. The power tool can quickly install and disassemble the working accessory without additional tools and can stably fix the working accessory.

Description

Technical Field

[0001] The invention relates to an electric tool, in particular to a multifunctional electric tool. Background Art

[0002] In some multifunctional power tools that need to install working accessories, it is necessary to ensure that the working accessories are stably installed on the power tool to prevent the working accessories from falling off during the operation of the power tool and causing damage to the user or surrounding objects. Multifunctional power tools require a higher frequency of replacement of working accessories to replace worn working accessories and change the type of working accessories. Multifunctional power tools that can quickly install and remove working accessories are launched on the market. Additional quick-release structures are designed to complete the quick disassembly of working accessories. Traditional quick-release structures are often designed for one type of working accessory, which means that the compatibility is not high and it is not convenient for users to use. Furthermore, the traditional quick-release structure is relatively complex, which not only increases the weight of the whole machine, but is also not conducive to the size optimization of the multifunctional power tool, and thus relatively sacrifices the performance of the multifunctional power tool. Summary of the invention

[0003] The main purpose of the present invention is to provide a multifunctional electric tool, which can easily and accurately install and remove various working accessories quickly without the need for additional tools, and can stably install the working accessories.

[0004] In order to achieve the above main objectives, the present invention proposes a multifunctional electric tool, comprising: a motor; an output shaft, which can drive a working accessory to swing around a first axis; a transmission assembly, connecting the motor and the output shaft, the transmission assembly comprising: a transmission bearing, driven by the motor; a shift fork, connected to the output shaft, driven by the transmission bearing and then swinging back and forth to drive the output shaft to swing; a mounting device, used to mount the working accessory, the mounting device is connected to the output shaft, the mounting device has a working state and a mounting state, when the mounting device is in the working state, it can drive the working accessory to move together with the output shaft, when the mounting device is in the mounting state, the working accessory is allowed to be installed on the mounting device and the working accessory is allowed to be removed from the mounting device; a holding mechanism, having a holding state that can provide a holding force to keep the mounting device in the mounting state; the mounting device comprises a first mounting member and a second mounting member that cooperate with each other to fix a working accessory, wherein the first mounting member rotates relative to the second mounting member around the first axis through a preset angle, triggering the holding mechanism to release the holding force provided to the mounting device so that the mounting device switches from the mounting state to the working state.

[0005] Optionally, the first mounting member is disposed at the lower end of the second mounting member and includes an operating portion, and the operating portion is operated to rotate the first mounting member.

[0006] Optionally, the multi-functional power tool further includes an inner shaft that can rotate relative to the output shaft. The inner shaft is fixedly connected to the first mounting member, and the first mounting member is operated to rotate about the first axis to trigger the holding mechanism to release the holding effect on the mounting device.

[0007] Optionally, the holding mechanism includes a guiding track formed on the output shaft and a movable member slidably disposed within the guiding track. The movable member is connected to the inner shaft. The guiding track includes a first guiding track and a second guiding track that are smoothly connected. When the movable member slides into the second guiding track, the holding mechanism provides a holding force to keep the mounting device in the mounted state.

[0008] Optionally, the multi-functional power tool further includes an unlocking member connected to the inner shaft for a user to operate to drive the inner shaft to displace, so that the movable member slides from the first guiding track to the second guiding track.

[0009] Optionally, the multi-functional power tool further includes an energy storage element that stores a driving force for driving the mounting device to have a tendency to move towards the working state. When the mounting device is in the mounted state and the first mounting member is operated to rotate, the energy storage element releases the driving force to drive the mounting device to move to the working state.

[0010] To achieve the above main object, the present invention provides a multi-functional power tool, including: a working attachment; an output shaft capable of driving the working attachment to swing about a first axis; a motor for driving the output shaft; a mounting device for detachably mounting the working attachment. The mounting device is connected to the output shaft and includes: a first mounting member disposed at the lower end of the output shaft and formed with a first clamping portion; a second mounting member, the working attachment is mounted between the first mounting member and the second mounting member. The second mounting member is formed with a second clamping portion that can cooperate with the first clamping portion to clamp the working attachment. The first mounting member can move relative to the second mounting member to a first position and a second position. When the first mounting member moves to the first position, the first clamping portion disengages from the second clamping portion in the direction along the first axis. When the first mounting member is operated to rotate about the first axis to the second position, the first clamping portion axially supports the working attachment along the first axis, and the second clamping portion fixes the working attachment in the radial direction along the first axis, so that the working attachment can be driven to rotate by the second clamping portion.

[0011] Optionally, the working attachment includes: a first mounting hole and a second mounting hole for cooperating with the mounting device to achieve mounting, and the second mounting hole surrounds the first mounting hole.

[0012] Optionally, the multi-functional power tool further includes an inner shaft that can rotate relative to the output shaft. The inner shaft is fixedly connected to the first mounting member. When the first mounting member is operated to rotate about the first axis to the second position, the inner shaft penetrates the first mounting hole, and the first mounting member axially supports the working attachment in the axial direction of the inner shaft.

[0013] Optionally, the first mounting hole forms an opening on the working attachment.

[0014] Optionally, the second mounting hole communicates with the first mounting hole. The first mounting member is arranged to pass through the first mounting hole and the second mounting hole along the first axis. When the first mounting member is operated to rotate about the first axis to the second position, the first clamping portion and the second mounting hole are misaligned in the first axis direction.

[0015] Optionally, the second clamping portion has a second clamping surface. When the second clamping portion is inserted into the second mounting hole, the second clamping surface abuts against the wall of the second mounting hole, and the second clamping surface and the first axis intersect obliquely.

[0016] Beneficial effects: The present invention provides a multi-functional power tool, which has a mounting device for quickly installing and disassembling a working attachment. The mounting device includes a first mounting member and a second mounting member. The first mounting member is arranged at the lower end of the multi-functional power tool and can be rotated by the user. The user installs the working attachment on the mounting device and rotates the first mounting member to lock the working attachment to the mounting device. The operation is simple and fast, which is convenient for the user to use. Description of the Drawings

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the multi-functional power tool in the first preferred embodiment.

[0018] Figure 2 It is for Figure 1 the three-dimensional structural schematic diagram of the multi-functional power tool in

[0019] Figure 3 It is for Figure 1 the internal cross-sectional view of the multi-functional power tool in

[0020] Figure 4 It is for Figure 1 the three-dimensional structural schematic diagram of the internal components of the front-end housing of the multi-functional power tool in the installed state in

[0021] Figure 5 It is for Figure 1 the three-dimensional structural schematic diagram of the internal components of the front-end housing of the multi-functional power tool in the working state in

[0022] Figure 6 It is for Figure 4 the plane structural schematic diagram of the internal components of the front-end housing of the multi-functional power tool in the installed state in

[0023] Figure 7 It is for Figure 5 the plane structural schematic diagram of the internal components of the front-end housing of the multi-functional power tool in the working state in

[0024] Figure 8 It is forFigure 4 Cross-sectional view of the internal components of the front housing in the installed state of the multi-functional power tool in

[0025] Figure 9 is Figure 5 Cross-sectional view of the internal components of the front housing in the operating state of the multi-functional power tool in

[0026] Figure 10 is Figure 1 Schematic diagram of a working attachment structure applicable to the multi-functional power tool of

[0027] Figure 11 is Figure 1 Another schematic diagram of a working attachment structure applicable to the multi-functional power tool of

[0028] Figure 12 is Figure 1 Another schematic diagram of a working attachment structure applicable to the multi-functional power tool of

[0029] Figure 13 is Figure 1 Another schematic diagram of a working attachment structure applicable to the multi-functional power tool of

[0030] Figure 14 Schematic plan view of the internal components of the front housing in the installed state of the multi-functional power tool of the second preferred embodiment.

[0031] Figure 15 Schematic plan view of the internal components of the front housing in the operating state of the multi-functional power tool of the second preferred embodiment.

[0032] Figure 16 Schematic diagram of a working attachment structure applicable to the multi-functional power tool of the second preferred embodiment.

[0033] Figure 17 Schematic diagram of a working attachment structure applicable to the multi-functional power tool of the second preferred embodiment.

[0034] Figure 18 is Figure 16 Schematic diagram of the relative position of the working attachment and the installation device in the installed state.

[0035] Figure 19 is Figure 16 Schematic diagram of the relative position of the working attachment and the installation device in the operating state. Detailed implementation mode

[0036] The present invention will be specifically introduced below in conjunction with the accompanying drawings and specific implementation modes.

[0037] Such as Figures 1 to 3The multifunctional power tool 100 shown can drive a working accessory to swing, and it includes a housing 150, a motor 120, an output shaft 111, a power source, and a mounting device 110. The motor 120 is disposed within the housing 150. The output shaft 111 extends along the direction of the first axis 101. The output shaft 111 is driven by the motor 120 and can drive the working accessory 200 to swing about the first axis 101. The power source can be a battery pack or an AC power source. The power tool 100 further includes a transmission assembly 140 for converting the rotation of the motor 120 into the swing of the output shaft 111. The transmission assembly 140 connects the motor 120 and the output shaft 111. The mounting device 110 is connected to the output shaft 111, and the mounting device 110 is used to detachably connect the working accessory 200, so as to mount the working accessory 200 through the mounting device 110 and drive the working accessory 200 to swing about the first axis 101.

[0038] The working accessory 200 can be a cutting circular saw blade or a cutting straight saw blade provided with saw teeth, or a sanding disc, a grinding disc, etc. for sanding the surface. The working accessory 200 has at least a first mounting hole 211 and a second mounting hole 212 to cooperate with the mounting device 110 to realize the detachable mounting of the working accessory 200.

[0039] Referring to Figure 3 , the housing 150 includes a front-end housing and a grip housing. The output shaft 111 for output is installed in the front-end housing 151, and the grip housing 152 is for the user to hold. The motor 120 and the transmission assembly 140 are disposed within the housing 150, and the motor 120 is disposed within the grip housing 152. The power source is supported by the housing 150 and connected to the motor 120. The transmission assembly 140 includes a transmission bearing 141 and a fork 142. The fork 142 has a swing rod and a clamping portion provided at one end of the swing rod. The swing rod is connected to the transmission bearing 141, and the clamping portion clamps the output shaft 111 to fix the output shaft 111. The mounting device 110 is connected to the output shaft 111 and used to fix the working accessory 200. Thus, the motor 120 drives the transmission assembly 140 to generate a swing, and the output shaft 111 is driven to swing by the fork 142. Thus, the fork 142, the output shaft 111, the mounting device 110, and the working accessory 200 form an integral body that swings about the first axis 101, and cutting and grinding work are realized through the working accessory 200.

[0040] The multifunctional power tool 100 further includes an energy supply device mounted or supported by the housing 150 and a control unit for controlling the operation of the multifunctional power tool 100. The control unit generally adopts a circuit board assembly and is connected to the motor 120 and the motor 120 to control the operation of the multifunctional power tool 100.

[0041] Specifically, the motor 120 includes an output motor shaft 121 that extends along the second axis 102. The transmission assembly 140 further includes a transmission shaft 143 and a support bearing 144. The transmission shaft 143 extends along the second axis 102, and the transmission shaft 143 is drivingly connected to the motor shaft 121 to be driven by the motor shaft 121 to rotate. One end of the transmission shaft 143 is supported by the support bearing, and the transmission shaft 143 is connected to the transmission bearing 141. The transmission shaft 143 has at least a partial shaft segment that is non-centrally symmetrically distributed about the second axis 102. The transmission bearing 141 is sleeved on the non-centrally symmetric distribution segment, and the transmission bearing 141 is eccentrically arranged relative to the second axis 102 and has an eccentricity. The fork 142 is connected to the transmission bearing 141 and is driven by the transmission bearing 141 to swing about the first axis 101. The fork 142 clamps the output shaft 111 through its clamping portion, thereby driving the output shaft 111 to perform a swinging motion about the first axis 101.

[0042] Please refer to Figures 4 to 7 , for the multi-functional power tool in this embodiment, the mounting device 110 includes a first mounting member 1131 and a first clamping portion 1133; a second mounting member 1132. The working accessory 200 is mounted between the first mounting member 1131 and the second mounting member 1132. The second mounting member 1132 is formed with a second clamping portion 1134 that can cooperate with the first clamping portion 1133 to clamp the working accessory 200. The mounting device 110 has a working state and a mounting state. Refer to Figure 4 and Figure 6 , when the mounting device 110 is in the working state, it can drive the working accessory 200 to move together with the output shaft. Refer to Figure 5 and Figure 7 , when the mounting device 110 is in the mounting state, it allows the working accessory 200 to be mounted on the mounting device 110 and allows the working accessory 200 to be detached from the mounting device 110. Thus, by operating the mounting device 110, the working accessory 200 can be quickly mounted onto the multi-functional power tool 100, or the working accessory 200 can be quickly detached from the multi-functional power tool 100.

[0043] The first mounting member 1131 is a device for the user to operate to trigger the working state of the mounting device, and the first mounting member is arranged at the lower end of the output shaft 111. Here, the working accessory 200 is also arranged at the lower end of the output shaft 111. Thus, the device for the user to operate to trigger the mounting device to lock the working accessory is arranged on the accessory at the position where the working accessory is mounted, thereby facilitating the user to operate and mount the working accessory 200. The first mounting member 1131 further includes an operation portion 1136. The operation portion 1136 is for the user to operate the first mounting member 1131 to drive the first mounting member 1131 to rotate about the first axis 101, thereby triggering the mounting device 110 to enter the working state from the mounting state to mount and lock the working accessory 200.

[0044] The working state refers to the state in which the multi-functional power tool 100 is allowed to drive the working accessory 200 to work, rather than specifically referring to the state in which the multi-functional power tool 100 drives the working accessory 200 to rotate. After the user converts the installation state of the installation device 110 to the working state, the multi-functional power tool 100 is turned on, so that the working accessory 200 installed on the multi-functional power tool 100 is driven to rotate.

[0045] The multi-functional power tool 100 further includes a holding mechanism 160, which has a holding state that can provide a holding force for keeping the installation device 110 in the installation state. The first mounting member 1131 rotates relative to the second mounting member 1132 around the first axis 101 by a preset angle, triggering the holding mechanism 160 to release the holding force provided for the installation device 110, so that the installation device 110 is switched from the installation state to the working state. Specifically, the first mounting member 1131 can move to a first position and a second position relative to the second mounting member 1132. When the first mounting member 1131 moves to the first position, the first clamping portion 1133 disengages from the second clamping portion 1134 in the direction of the first axis 101. When the first mounting member 1131 is operated to rotate around the first axis 101 to the second position, the second clamping portion 1134 is inserted into the second mounting hole 212. Thus, the first clamping portion 1133 supports the working accessory in the axial direction of the first axis 101, and the second clamping portion fixes the working accessory in the radial direction of the first axis, so that the working accessory can be driven to rotate by the second clamping portion.

[0046] The multi-functional power tool 100 further includes an inner shaft 130 that can rotate relative to the output shaft 111. The inner shaft 130 is fixedly connected to the first mounting member 1131. The first mounting member 1131 is operated to rotate around the first axis 101 to trigger the holding mechanism 160 to release the holding effect on the installation device 110. Preferably, the output shaft 111 is coaxially connected to the inner shaft 130. The output shaft 111 forms a receiving cavity around the first axis 101, and the inner shaft 130 passes through the receiving cavity along the first axis 101, or the inner shaft 130 is completely disposed in the receiving cavity. At this time, the output shaft 111 can also be regarded as an outer shaft surrounding the inner shaft 130.

[0047] Refer to Figure 8 and Figure 9, the multi-functional power tool 100 further includes an energy storage element 112, which stores a driving force for driving the installation device 110 to have a tendency to move towards the working state. When the installation device 110 is in the installation state and the installation device 110 receives a rotational force applied by the user, the inner shaft 130 rotates relative to the output shaft 111 to trigger the energy storage element 112 to release the driving force to drive the installation device 110 to move to the working state. The energy storage element 112 is a spring disposed in the receiving cavity. The spring is sleeved on the inner shaft 130 and biases the inner shaft 130 to generate a driving force. The energy storage element 112 can also be set as other elastic members or other elements that can store energy by compression and release the stored energy.

[0048] The holding mechanism 160 includes a guiding track 1111 and a movable member 133 slidably disposed in the guiding track 1111. The movable member 133 is fixedly connected to the inner shaft 130. The guiding track 1111 includes a first guiding track 1112 and a second guiding track 1113 that are smoothly connected; when the movable member 133 slides to the second guiding track 1113, the holding mechanism 160 provides a holding force for keeping the installation device 110 in the installation state.

[0049] Refer to Figure 10 , the working accessory 200 includes a connecting portion 210 and an operating portion 220. The operating portion 220 is used for the output of a working saw blade. The connecting portion 210 is used for connecting to the installation device. The connecting portion 210 is provided with a first mounting hole 211 and a second mounting hole 212. Taking the working accessory 200 as a saw blade as an example, the operating portion 220 is provided with saw teeth for cutting an object. The connecting portion 210 is provided with a first mounting hole 211 and a second mounting hole 212. The first mounting hole 211 is disposed at the middle position of the connecting portion 210. The second mounting hole 212 is disposed on the periphery of the first mounting hole 211 and is preferably provided with a plurality of them arranged around the first mounting hole 211. The size of the first mounting hole 211 is set to be larger than the cross-sectional size of the inner shaft 130, so that the inner shaft 130 can penetrate through the first mounting hole 211. The size of the first mounting hole 211 is set to be smaller than the cross-sectional size of the first mounting member 1131, so that when the working accessory 200 is installed in the first mounting member 1131 and the second mounting member 1132, the working accessory 200 will not be separated from the first mounting member 1131 in the direction of the first axis 101 through the first mounting hole 211.

[0050] Refer to Figures 11 to 13 , the working accessory can also be accessories such as a grinding disc 200a, a shovel saw 200b, a grinding sheet 200c, etc., and has mounting holes that cooperate with the installation device, which will not be elaborated here.

[0051] The first mounting member 1131 is coupled to the inner shaft 130, and the inner shaft 130 is fixedly connected to the first mounting member 1131. The second mounting member 1132 is coupled to the output shaft 111, and the output shaft 111 is fixedly connected to the second mounting member 1132. The first mounting member 1131 is disposed at the end of the inner shaft 130, and the second mounting member 1132 is disposed at the end of the output shaft 111. The first mounting member 1131 is operated to drive the inner shaft 130 to rotate relative to the output shaft 111 about the first axis 101 to drive the mounting device 110 to switch between the mounting state and the working state.

[0052] The guiding track 1111 is formed on the output shaft 111, and the guiding track 1111 is a substantially L-shaped hole formed on the output shaft 111. The movable member 133 is connected to the inner shaft 130. The sliding track along which the movable member 133 can slide within the guiding track 1111 has a height in the direction along the first axis 101 that is less than or equal to the height of the guiding track 1111 in the direction along the first axis 101. That is to say, usually, when the movable member 133 slides along the guiding track 1111, it usually does not slide to the topmost end of the guiding track 1111.

[0053] The movable member 133 is used to cooperate with the output shaft 111. The movable member 133 is specifically a pin connected to the inner shaft 130. The movable member 133 moves synchronously with the inner shaft 130 in the direction along the first axis 101, and the movable member 133 moves synchronously with the inner shaft 130 in the circumferential direction around the first axis 101. The pin is installed on the inner shaft 130, the pin extends in a direction perpendicular to the first axis 101, and the pin is inserted into the guiding track 1111 in a direction perpendicular to the first axis 101, so as to slide along the guiding track 1111. The pin penetrates the inner shaft 130, so that the movable member 133 protrudes from both side walls of the inner shaft 130. Correspondingly, the output shaft 111 is provided with two guiding tracks 1111 that match the position of the movable member 133. The movable members 133 disposed on both side walls of the inner shaft 130 are respectively clamped to the guiding tracks 1111 at both ends, and the movable members 133 rotate synchronously within the two guiding tracks 1111.

[0054] The first mounting member 1131 is provided as a knob for user operation. The operating portion 1136 is a protrusion for user rotation, and the first mounting member 1131 is fixedly connected to the inner shaft 130. The user drives the inner shaft 130 to rotate by rotating the first mounting member 1131, and the movable member 133 connected to the inner shaft 130 is driven to slide within the guiding track 1111 to move between the first guiding track 1112 and the second guiding track 1113 in the guiding track 1111. Thus, the inner shaft 130 moves in the axial direction of the first axis 101, so as to complete the unlocking and locking work of the working attachment 200 through the cooperation of the first mounting member 1131 and the second mounting member 1132.

[0055] The second clamping portion 1134 of the second mounting member 1132 matches the position and size of the second mounting hole 212, so that the second clamping portion 1134 can be placed into the second mounting hole 212 and pass through the working attachment 200 through the second mounting hole 212 in the axial direction of the first axis 101. Thus, in the working state, the displacement of the working attachment 200 in the radial direction of the first axis 101 is restricted by the second clamping portion 1134. The bottom surface of the first mounting member 1131 facing the second mounting member 1132 forms a first clamping portion 1133. In this embodiment, the second clamping portion 1134 is a plane. The first mounting member 1131 is acted on by the energy storage device in the working state and cooperates with the second mounting member 1132 to clamp the working attachment 200 in the axial direction of the first axis 101, and the first clamping portion 1133 supports the working attachment 200 in the radial direction. Through the cooperation of the first clamping portion 1133 and the second clamping portion 1134, the working attachment 200 is fixedly mounted on the mounting device 110 in the working state.

[0056] In the first preferred embodiment, the connecting portion 210 is provided in an open manner, that is, the first mounting hole 211 extends to the edge of the connecting portion 210 of the working attachment 200 and forms an opening 2111 on the edge of the connecting portion 210. When the user installs the working attachment 200 on the mounting device 110, by inserting the opening 2111 into the inner shaft 130 and making the second mounting hole 212 and the second clamping portion 1134 radially aligned, the connecting portion 210 is placed between the first mounting member 1131 and the second mounting member 1132. The user twists the first clamping portion 1133 to rotate it from the first position to the second position. The inner shaft 130 rotates and is acted on by the storage device to move upward relatively, that is, the first mounting member 1131 approaches the second mounting member 1132. The first mounting member 1131 drives the working attachment 200 to move towards the first mounting member 1131. The second clamping portion 1134 is inserted into the second mounting hole 212, and the first mounting member 1131 and the second mounting member 1132 cooperate to clamp the working attachment 200. In this embodiment, the first mounting hole 211 and the second mounting hole 212 can be communicated or not, which is not limited here.

[0057] The first guiding track 1112 is arranged to extend in the direction of the first axis 101, and the second guiding track 1113 is arranged to extend in a direction approximately perpendicular to the first axis 101. The second guiding track 1113 and the first guiding track 1112 are smoothly connected, so that the movable member 133 can smoothly slide from the second guiding track 1113 into the first guiding track 1112. In the installed state, the movable member 133 is clamped in the second guiding track 1113, and in the working state, the movable member 133 is clamped in the first guiding track 1112. During the conversion from the installed state to the working state, and when the compressed state of the energy storage element 112 is released, the driving movable member 133 slides from the second guiding track 1113 to the first guiding track 1112, and the movable member 133 is limited by the first guiding track 1112 and the energy storage element 112. Correspondingly, during the conversion from the working state to the installed state, the movable member 133 slides from the first guiding track 1112 to the second guiding track 1113, and the energy storage element 112 is correspondingly compressed and limited by the second guiding track 1113. When the movable member 133 moves into the first guiding track 1112, the movable member 133 is in the first holding position, and when the movable member 133 moves into the second guiding track 1113, the movable member 133 is in the second holding position. At this time, it can also be understood that when the movable member 133 moves from the second holding position to the first holding position, the whole formed by the movable member 133 and the inner shaft 130 rotates through a preset angle relative to the output shaft 111. When the movable member 133 moves from the first holding position to the second holding position, the movable member 133 slides from the first guiding track 1112 to the second guiding track 1113 in the guiding track 1111, and provides a holding force in the second guiding track 1113 to keep the mounting device 110 in the installed state.

[0058] The second clamping portion 1134 includes a clamping surface 1135 forming its side portion. When the second clamping portion 1134 is inserted into the second mounting hole 212, the clamping surface 1135 abuts against the hole wall of the second mounting hole 212. Optionally, the clamping surface 1135 is inclinedly arranged so that the clamping surface 1135 intersects the first axis 101 obliquely. Thus, after the clamping surface 1135 is worn, the inclined state of their intersection with the plane enables them to adapt to the wear state of the working attachment 200, thereby improving the locking stability of the mounting device 110 for the working attachment 200. Specifically, the clamping surface 1135 contacts the side wall of the second mounting hole 212 of the working attachment 200. When the clamping surface 1135 is worn, the position where the clamping surface 1135 contacts the second mounting hole 212 is adaptively changed through the inclined surface to clamp the working attachment 200.

[0059] The multi-functional power tool 100 further includes an unlocking member 180 which is connected to the inner shaft 130 and is for a user to operate to drive the inner shaft 130 to displace, so that the movable member 133 slides from the first holding position to the second holding position. Specifically, the unlocking member 180 is arranged above the inner shaft 130. When the multi-functional power tool 100 is in a working state and the user operates the unlocking member 180 to drive the inner shaft 130 to move downward, the first mounting member 1131 and the second mounting member 1132 are separated, and the first mounting member 1131 rotates from the second position to the first position, so that the mounting device 110 enters a mounting state, and the working attachment 200 is detachable relative to the mounting device.

[0060] Referring Figure 14 and Figure 15 , in the second preferred embodiment of the present invention, the first mounting member 1131a is connected to the inner shaft and includes a first clamping portion which is circumferentially distributed around the first axis direction. Referring Figure 16 and Figure 17 is the working attachment 200d of the second preferred embodiment, which includes a first mounting hole 211a and a second mounting hole 212a. The second mounting hole 212a communicates with the first mounting hole 211a, and the first mounting member 1131a is arranged to be able to pass through the first mounting hole 211a and the second mounting hole 212a along the first axis. Specifically, the first mounting hole 211a is formed in the middle of the connecting portion, and the second mounting hole 212a surrounds and communicates with the first mounting hole 211a. Preferably, there are a plurality of second mounting holes 212a and they are symmetrically distributed with respect to the center of the second mounting hole 212a. The first mounting member 1131a includes a first clamping portion 1133a which is formed on the side of the first mounting member 1131a and corresponds to the position and size of the second mounting hole 212a. Referring Figure 18 , when the first mounting member 1131a is in the first position, the first mounting member 1131a is arranged to be able to pass through the first mounting hole 211a and the second mounting hole 212a along the first axis, and the working attachment 200d passes through the first mounting member 1131a and is placed between the first mounting member 1131a and the second mounting member 1132a. Referring Figure 19 , when the user rotates the first mounting member 1131a, the first mounting member 1131a is operated to rotate around the first axis to the second position, and the first clamping portion 1133a and the second mounting hole 212a are misaligned in the first axis direction. Thus, the first clamping portion 1133a supports and clamps the working attachment 200d in the radial direction of the first axis, and the second clamping portion 1134a of the second mounting member 1132a also matches the position and size of the second mounting hole 212a. Thus, the second clamping portion 1134a can also be inserted into the second mounting hole 212a along the first axis direction. Thus, through the cooperation of the second mounting member 1132a and the first mounting member 1131a, the working attachment 200d is clamped.

[0061] The first clamping portion 1133a is symmetrically arranged around the first axis on the first mounting member 1131a and forms an operating portion 1136a. The user controls the rotation of the first mounting member 1131a by holding the operating portion 1136a, that is, by holding a plurality of first clamping portions 1133a, to control the rotation of the first mounting member 1131a. Thereby triggering the locking of the working attachment by the mounting device.

[0062] It can be understood that the mounting device in this embodiment can also be used to mount the working attachment with an opening in the first preferred embodiment. Therefore, the mounting device can be adapted to mount working attachments of different interface types, improving the compatibility of the mounting device with the working attachments.

[0063] In this embodiment, the working attachment 200d may further include a third mounting hole 213a for connecting with the second clamping portion 1134a. At this time, the second clamping portion 1134a is inserted into the third mounting hole 213a in the working state, and the second mounting hole 212a is only used for the first clamping portion 1133a to pass through when mounting the working attachment. And in the working state, the first clamping portion 1133a and the third mounting hole 213a are staggeredly distributed in the axial direction of the first axis to support the working attachment through the first clamping portion 1133a, and lock the working attachment 200d through the cooperation of the first clamping portion 1133a and the second clamping portion 1134a.

[0064] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the drawings are only examples and do not limit the present invention. The object of the present invention has been completely and effectively achieved. The function and structural principle of the present invention have been shown and described in the embodiments. Without departing from the principle, the embodiments of the present invention can have any deformation or modification.

Claims

1. A multi-functional power tool, comprising: A motor; An output shaft capable of driving a working accessory to swing about a first axis; A transmission assembly connecting the motor and the output shaft, the transmission assembly comprising: A transmission bearing driven by the motor; A fork connected to the output shaft and driven by the transmission bearing to swing back and forth to drive the output shaft to swing; A mounting device for mounting the working accessory, the mounting device being connected to the output shaft, the mounting device having a working state and a mounting state. When the mounting device is in the working state, it can drive the working accessory to move together with the output shaft. When the mounting device is in the mounting state, it allows the working accessory to be mounted to the mounting device and allows the working accessory to be detached from the mounting device; A holding mechanism having a holding state capable of providing a holding force for keeping the mounting device in the mounting state; The mounting device includes a first mounting member and a second mounting member that cooperate to fix a working accessory. Among them, the first mounting member is operated to rotate relative to the second mounting member about the first axis by a preset angle, triggering the holding mechanism to release the holding force provided to the mounting device so that the mounting device switches from the mounting state to the working state; The multi-functional power tool further includes an inner shaft capable of rotating relative to the output shaft, and the inner shaft is fixedly connected to the first mounting member; The holding mechanism includes a guiding track formed on the output shaft and a moving member slidably disposed in the guiding track. The moving member is connected to the inner shaft. The guiding track includes a first guiding track and a second guiding track that are smoothly connected. When the first mounting member is operated to rotate about the first axis and the inner shaft rotates to drive the moving member to slide into the second guiding track, the holding mechanism provides a holding force for keeping the mounting device in the mounting state. When the moving member slides from the second guiding track to the first guiding track, it triggers the release of the holding force on the mounting device.

2. The multi-functional electric tool according to claim 1, characterized in that: The first mounting member is disposed at the lower end of the second mounting member and includes an operating portion for operating to rotate the first mounting member.

3. The multi-functional electric tool according to claim 1, characterized in that: The holding mechanism further includes an unlocking member connected to the inner shaft, and the unlocking member is used to drive the inner shaft and the moving member to move.

4. The multi-functional electric tool according to claim 1, characterized in that: The multi-functional power tool further includes an energy storage element that stores a driving force for driving the mounting device to have a tendency to move towards the working state. When the mounting device is in the mounting state and the first mounting member is operated to rotate, the energy storage element releases the driving force to drive the mounting device to move to the working state.

5. A multi-functional power tool, comprising: An output shaft capable of driving a working accessory to swing about a first axis; A motor for driving the output shaft; A mounting device for detachably mounting the working accessory, the mounting device being connected to the output shaft; A holding mechanism having a holding state capable of providing a holding force for keeping the mounting device in the mounting state; The mounting device includes: The first mounting member is provided at the lower end of the output shaft and is formed with a first clamping portion; The second mounting member, the working attachment is mounted between the first mounting member and the second mounting member, and the second mounting member is formed with a second clamping portion that can cooperate with the first clamping portion to clamp the working attachment; Wherein, the first mounting member can move relative to the second mounting member to a first position and a second position; when the first mounting member moves to the first position, the first clamping portion is disengaged from the second clamping portion in the direction along the first axis; when the first mounting member is operated to rotate around the first axis to the second position, the holding mechanism is triggered to release the holding force provided to the mounting device, the first clamping portion supports the working attachment in the axial direction along the first axis, and the second clamping portion fixes the working attachment in the radial direction along the first axis, so that the working attachment can be driven to rotate by the second clamping portion; The multi-functional power tool further includes an inner shaft that can rotate relative to the output shaft, and the inner shaft is fixedly connected to the first mounting member, The holding mechanism includes a guiding track formed on the output shaft and a movable member slidably disposed in the guiding track, the movable member is connected to the inner shaft, and the guiding track includes a first guiding track and a second guiding track that are smoothly connected; when the first mounting member is operated to rotate around the first axis and the inner shaft rotates to drive the movable member to slide into the second guiding track, the holding mechanism provides a holding force to keep the mounting device in the mounting state; when the movable member slides from the second guiding track to the first guiding track, the holding force applied to the mounting device is triggered to be released.

6. The multi-functional electric tool according to claim 5, characterized in that: The working attachment includes: a first mounting hole and a second mounting hole for cooperating with the mounting device to achieve mounting, and the second mounting hole surrounds the first mounting hole.

7. The multi-functional electric tool according to claim 6, characterized in that: When the first mounting member is operated to rotate around the first axis to the second position, the inner shaft penetrates through the first mounting hole, and the first mounting member supports the working attachment in the axial direction of the inner shaft.

8. The multi-functional electric tool according to claim 7, characterized in that: The first mounting hole forms an opening on the working attachment.

9. The multi-functional electric tool according to claim 7, characterized in that: The second mounting hole communicates with the first mounting hole, the first mounting member is arranged to be able to pass through the first mounting hole and the second mounting hole along the first axis, and when the first mounting member is operated to rotate around the first axis to the second position, the first clamping portion and the second mounting hole are misaligned in the first axis direction.

10. The multi-functional electric tool according to claim 6, characterized in that: The second clamping portion has a second clamping surface, when the second clamping portion is inserted into the second mounting hole, the second clamping surface abuts against the hole wall of the second mounting hole, and the second clamping surface and the first axis intersect obliquely.

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