Electric cutting tools

Abstract

The present invention provides an electric cutting tool, which includes a working component and a control component for controlling the working component, the control component includes: a shell, a drive unit and a power supply unit, a cooling structure for cooling the drive unit and the power supply unit is formed in the shell, the cooling structure includes an air inlet arranged on the first shell, an air outlet arranged on the second shell, and a cooling air duct connecting the air inlet and the air outlet, the drive unit includes a fan protruding into the cooling air duct, the fan drives the cooling gas outside the control component to flow through the power supply unit and the drive unit along the cooling air duct through the air inlet and the drive unit and is discharged from the air outlet. The electric cutting tool of the present invention can effectively cool the drive unit and the power supply unit accommodated in the shell by providing a control component with a cooling structure, thereby improving the working efficiency of the electric cutting tool using the control component and extending the service life, while ensuring a compact structure, small space occupation and convenient operation.

Description

Technical Field

[0001] The invention relates to an electric cutting tool. Background Art

[0002] As a portable cutting tool, an electric cutting tool can cut materials such as stone, concrete or wood by using a cutting disc rotatably mounted on a bracket.

[0003] In fact, in order to facilitate the operation and use of high-power handheld electric cutting tools, it is necessary to achieve a good cooling effect while achieving miniaturization, so as to further ensure the use effect of the high-power handheld electric cutting tools.

[0004] Although the existing high-power handheld electric cutting tools have corresponding cooling structures, the conventional cooling structures usually only cool the drive motor. In the prior art, water cooling is used to cool the internal motor while spraying the cutting blade. However, since the water cooling structure requires complex water cooling pipelines, on the one hand, the cooling pipelines cannot be accurately laid to various positions of the electric cutting tool, resulting in limited cooling effect; on the other hand, the laying of cooling pipelines will increase the volume of the electric cutting tool, which is not conducive to the miniaturization of the volume of the electric cutting tool, resulting in limited promotion of the electric cutting tools in the prior art. Furthermore, since the battery pack used in the high-power handheld electric cutting tool has a large power, the temperature of the corresponding circuit control device rises very quickly, and it is necessary to provide a simple and reliable cooling structure to ensure the working efficiency of the whole machine. In view of this, it is necessary to provide a new electric cutting tool to solve the above problems. Summary of the invention

[0005] An object of the present invention is to provide an electric cutting tool with a control component. The electric tool can effectively cool a drive unit and a power supply unit housed in the shell while ensuring that the control component has a small volume, thereby ensuring that the electric cutting tool using the control component has a compact structure, occupies a small space, and is easy to operate.

[0006] To achieve the above-mentioned purpose of the invention, the present invention provides an electric cutting tool, including a working component and a control component for controlling the working component, the control component including: a shell, the shell at least including a first shell, a second shell and a receiving space formed by the first shell and the second shell in a snap-fitting manner; a driving unit, the driving unit is received in the receiving space and is used to drive the working component; a power supply unit, the power supply unit includes a battery cavity arranged in the receiving space and a battery plugged into the battery cavity; a cooling structure for cooling the driving unit and the power supply unit is formed in the shell, the cooling structure includes an air inlet arranged on the first shell, an air outlet arranged on the second shell and a cooling air duct connecting the air inlet and the air outlet, the driving unit includes a fan protruding into the cooling air duct, the fan drives the cooling gas outside the control component to flow through the power supply unit and the driving unit through the air inlet along the cooling air duct and is discharged from the air outlet.

[0007] As a further improvement of the present invention, the cooling structure also includes an air gathering component at least covering the fan, the air gathering component having an exhaust port arranged toward the air outlet, the cooling gas flows through the power supply unit and the drive unit via the air inlet along the cooling air duct into the air gathering component and is finally discharged via the exhaust port and the air outlet.

[0008] As a further improvement of the present invention, the drive unit includes a drive motor connected to the front end of the shell and an electronic control unit for controlling the drive motor. One end of the drive motor is detachably connected to the shell and is driven by the working component, and the other end is connected to the fan.

[0009] As a further improvement of the present invention, the housing includes a third housing for fixing the drive unit, the drive motor passes through the third housing, and the electronic control unit is arranged inside the third housing and accommodated in the accommodation space.

[0010] As a further improvement of the present invention, the third shell is buckled on the front ends of the first shell and the second shell and is made of metal material, and at least one heat dissipation rib is provided on the inner side of the third shell.

[0011] As a further improvement of the present invention, the electronic control unit is arranged around the drive motor, the electronic control unit is provided with at least one MOS tube, and the at least one MOS tube is arranged close to the drive motor to accelerate heat dissipation when the fan is used.

[0012] As a further improvement of the present invention, the air inlet is arranged on the side wall of the first shell and is formed by the inward depression of the first shell. An air inlet baffle is also provided on the outside of the air inlet, and a filter component is provided between the air inlet baffle and the air inlet.

[0013] As a further improvement of the present invention, the control assembly also includes a first handle assembly formed on the first shell and / or the second shell, a second handle assembly arranged around the first shell, and a base detachably connected to the lower part of the shell.

[0014] As a further improvement of the present invention, the working assembly includes a cutting knife unit, a transmission unit for transmission-connecting the cutting knife unit and the driving unit, and a spray unit for spraying the cutting knife unit.

[0015] As a further improvement of the present invention, the spray unit is connected to an external water supply unit, and the spray unit includes a spray component attached to the cutter unit, a control valve for controlling the spray state of the spray component, and an external connector for connecting to the external water supply unit, and the spray component, control valve and external connector are connected by a pipeline.

[0016] The beneficial effects of the present invention are as follows: the control component of the present invention can effectively cool down the drive unit and the power supply unit accommodated in the shell while ensuring that the control component has a small volume by setting a cooling structure formed in the shell, further making the electric cutting tool using the control component compact in structure, small in space, and easy to operate, thereby improving the working efficiency of the electric cutting tool and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the control component of the present invention.

[0018] Figure 2 yes Figure 1 Schematic diagram of the split control components in .

[0019] Figure 3 yes Figure 1 The control component omits the second shell, battery and internal structure diagram of the drive unit.

[0020] Figure 4 yes Figure 1 Schematic diagram of the disassembly of the first shell from another angle.

[0021] Figure 5 yes Figure 1 Schematic diagram of the structure when the third shell and the drive unit are assembled.

[0022] Figure 6It is a three-dimensional schematic diagram of the electric cutting tool of the present invention.

[0023] Figure 7 yes Figure 6 Schematic diagram of the disassembly of the electric cutting tool.

[0024] Figure 8 yes Figure 6 Schematic diagram of the structure when the transmission unit is connected to the drive unit.

[0025] Fig. 9 yes Figure 6 Schematic diagram of the structure of the transmission unit.

[0026] Fig.10 yes Figure 6 Schematic diagram of the disassembly of the transmission unit from another angle.

[0027] Fig.11 yes Figure 6 Schematic diagram of the disassembly of the transmission unit and the cutter unit when connected DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Examples of these preferred embodiments are illustrated in the drawings.The embodiments of the invention shown in the drawings and described with reference to the drawings are exemplary only and the invention is not limited to these embodiments.

[0030] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the drawings, while other details that are not closely related to the present invention are omitted.

[0031] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0032] See also Figure 1 As shown, the control assembly 100 provided by the present invention is used to control the working unit 200 to complete the corresponding gardening task. In the present invention, the control assembly 100 includes a housing 11, a driving unit 12 and a power supply unit 13 accommodated in the housing 11.

[0033] See also Figure 1 and Figure 2As shown, the longitudinal extension direction of the shell 11 is defined as the positive direction, and the end used to connect and fix the working unit 200 is the front end, and the end away from the working unit 200 is the tail end, then the shell 11 includes a first shell 111 arranged on both sides of the positive direction, a second shell 112 arranged corresponding to the first shell 111, and a receiving space 113 jointly enclosed by the first shell 111 and the second shell 112.

[0034] The first shell 111 and the second shell 112 are mutually engaged. Furthermore, the shell 11 further includes a first handle assembly 114 arranged at the rear end thereof. In a preferred embodiment of the present invention, the first handle assembly 114 is formed by surrounding the first shell 111 and the second shell 112, that is, the first handle assembly 114 and the shell 11 are integrally formed. Such an arrangement, on the one hand, enhances the stability of the connection between the first handle assembly 114 and the shell 11; on the other hand, simplifies the production steps and processes of the shell 11, thereby achieving the purpose of reducing the production cost of the control assembly 100. Of course, in other embodiments of the present invention, the first handle assembly 114 can also be formed separately on the first shell 111 and / or the second shell 112, or the first handle assembly 114 can also be separately arranged from the shell 11, and it is only necessary to ensure the stability of the connection between the first handle assembly 114 and the shell 11.

[0035] Furthermore, the shell 11 also includes a second handle assembly 115 located at the front end of the shell 11 and detachably connected to the shell 11. Specifically, the second handle assembly 115 is provided with an arched gripping portion 1151 and a first fixing portion 1152 and a second fixing portion 1153 respectively located at both ends of the gripping portion 1151.

[0036] The holding portion 1151 extends from one end of the first fixing portion 1152 in a direction away from the second shell 12 and is arranged around the first shell 111. In this way, the first shell 111 is surrounded and protected by the holding portion 151, which effectively avoids the first shell 111 from colliding with the outside world, and then simplifies the reinforcement structure or setting thickness of the first shell 111, thereby reducing the preparation cost of the first shell 111, further achieving the purpose of reducing the production cost of the control component 100.

[0037] Furthermore, the first fixing portion 1152 is detachably connected to the bottom of the first shell 111 and / or the second shell 112, and the second fixing portion 1153 is detachably connected to the side wall of the second shell 112. In the present embodiment, the bottoms of the first shell 111 and the second shell 112 are also provided with grooves (unnumbered) for clamping and accommodating the first fixing portion 1152. With such an arrangement, when the first fixing portion 1152 is accommodated in the groove, the outer surface of the first fixing portion 1152 is flush with or lower than the bottom of the shell 11, so as to facilitate the stable placement of the control component 100 on the table.

[0038] In a preferred embodiment of the present invention, the shell 11 also has a base 116 arranged at the front end of its lower portion, and the base 116 is used to support the shell 11 so that the control component 100 has a higher supporting strength. In this embodiment, the first fixing portion 1152 passes through the base 116 to connect and position with the handle 11. Such a configuration can facilitate the connection and installation of the second handle component 115 and the shell 11.

[0039] Please also read Figure 1 to Figure 5 As shown, the housing 11 is also formed with a cooling structure 14 for cooling the driving unit 12 and the power supply unit 12. Specifically, the cooling structure 14 includes an air inlet 141 disposed on the first housing 111, an air outlet 142 disposed on the second housing 112, and a cooling air duct 143 connecting the air inlet 141 and the air outlet 142.

[0040] In the present invention, the air inlet 141 is arranged on the side wall of the first shell 111 and is formed by the inward depression of the first shell 111. Furthermore, the air inlet 141 has a plurality of parallel grilles (not shown). Such a configuration can effectively prevent large debris from entering the receiving space 113 during the use of the control component 100.

[0041] In a preferred embodiment of the present invention, an air inlet baffle 144 is further provided on the outer side of the air inlet 141, and a filter component (not shown) is further provided between the air inlet baffle 144 and the air inlet 141. In this embodiment, the filter component is a filter layer that can be used to absorb debris, humid gas and other debris. Preferably, the filter layer is made of a material with filter holes such as sponge, filter mesh or gauze. Such a configuration can effectively prevent impurities from entering the receiving space 113 of the shell 11, and then make the cooling gas entering the cooling air duct through the air inlet baffle 144, the filter component and the air inlet 141 clean, which can effectively protect the service life of the drive unit 12.

[0042] Furthermore, the air inlet baffle 144 is detachably connected to the first shell 111. With this arrangement, the filter component can be replaced by removing the air inlet baffle 144 to prevent debris from clogging the filter holes of the filter component, thereby ensuring the filtering effect of the filter component.

[0043] The air outlet 142 is arranged on the side wall of the second shell 112 and the first shell 111, and the size of the air inlet 141 is larger than the size of the air outlet 142. Such a setting can effectively increase the amount of cooling gas entering the accommodation space 113 and ensure the heat exchange efficiency of the cooling structure 14. Furthermore, the air outlet 142 is set laterally toward the second shell 112 to prevent the air outlet position from affecting the operator's use.

[0044] The cooling air duct 143 is arranged around the power supply unit 13 contained in the containing space 113, and the setting position of the cooling air duct 143 passes through the power supply unit 13 and the drive unit 12 at the same time. Such an arrangement can ensure that the cooling gas flowing through the cooling air duct 143 is in full contact with the drive unit 12 and the power supply unit 13, further improving the heat exchange efficiency of the cooling structure 14. In a preferred embodiment of the present invention, the air inlet 141 is located in the middle of the first shell 111, and the air outlet 142 is located at the front end of the second shell 112, so that the cooling air duct 143 is arranged in an "L" shape. Such an arrangement can ensure that the power supply unit 13 has a smaller volume while ensuring the heat exchange efficiency of the cooling structure 14. Of course, in other embodiments of the present invention, the cooling air duct 143 can also be arranged in other shapes, as long as the heat exchange cooling effect of the pillow cooling structure 14 is achieved.

[0045] The cooling structure 14 also includes a wind gathering component 146 arranged in the cooling air duct 143 and corresponding to the drive unit 12. The wind gathering component 146 is used to collect the cooling gas entering the cooling air duct 143 through the air inlet 141 and make the cooling gas fully contact with the drive unit 12 to reduce the operating temperature of the drive unit 12 and ensure the endurance of the control component 100 when driving the working unit 200.

[0046] In a preferred embodiment of the present invention, the wind gathering component 146 is detachably connected to the front end of the shell 11, and the shell 11 also has a third shell 117 for connecting and fixing the wind gathering component 146. Specifically, the third shell 117 is snapped onto the front ends of the first shell 141 and the second shell 142 to close the shell 11 to form a receiving space 113. Such a configuration can prevent dust or dirty water generated during the operation of the working unit 200 from entering the receiving space 113 along the gap at the engaging position of the first shell 111 and the second shell 112, thereby affecting the normal operation of the driving unit 12 and the power supply unit 13.

[0047] In the present embodiment, the driving unit 12 passes through the third shell 117 and protrudes into the cold zone air duct 143, and is connected and positioned at the third shell 117. The wind gathering component 146 covers the part of the driving unit 12 accommodated in the accommodating space 113, and the wind gathering component 146 has an exhaust port 147 for exhausting air. In the present embodiment, the exhaust port 147 is arranged toward the air outlet 142 to discharge the air gathered in the wind gathering component 146 along the exhaust port 147 through the air outlet 142.

[0048] The driving unit 12 includes a driving motor 121 connected to the front end of the housing 11 , an electronic control unit for controlling the driving motor 121 , and a fan 123 connected to the driving motor 121 . Specifically, the electronic control unit is a PCB board 122, the drive motor 121 is detachably connected to the shell 11, and the drive motor 121 has a drive shaft (unnumbered) that simultaneously drives the working unit 200 and the fan 123. Specifically, one end of the drive shaft is drive-connected to the working unit 200, and the other end is connected to the fan 123, and the fan 123 protrudes into the cooling air duct 143. Further, the wind gathering component 146 covers the fan 123 and the drive motor 121, and an air inlet channel (unnumbered) for air intake is formed between the wind gathering component 146 and the third shell 117. At this time, the cooling airflow outside the control component 100 can flow through the power supply unit 13 along the cooling air duct 143 through the air inlet 141 driven by the fan 123, and further enter the wind gathering component 146 through the air inlet channel between the wind gathering component 146 and the third shell 117, so that the cooling gas can fully cool down the drive motor 121, and finally be discharged through the exhaust port 147 and the air outlet 142.

[0049] The PCB board 122 is fixed inside the shell 11, and the setting position of the cooling air duct 143 passes through the fixed position of the PCB board 122. In the present invention, the PCB board 122 is set on the inner side of the third shell 117 and is fixed by glue filling or threaded connection. Specifically, the PCB board 122 is arranged around the drive motor 121 so that the PCB board 122 is arranged in a C-shaped or L-shaped or circular or linear arrangement structure. Furthermore, the PCB board 122 is provided with a plurality of MOS tubes 1221 for controlling the voltage of the control component 100, and the plurality of MOS tubes 1221 are arranged close to the drive motor 121. With such a configuration, when the cooling gas enters the wind gathering component 146 through the air inlet channel between the wind gathering component 146 and the third shell 117, the cabinet PCB board 122 can be cooled at the same time.

[0050] In a preferred embodiment of the present invention, the third shell 117 is a metal shell made of metal shell material. At this time, the PCB board 122 can also achieve heat dissipation through the third shell 117. Preferably, a plurality of heat dissipation ribs 118 are also provided on the third shell 117. Such a setting can effectively increase the heat dissipation area of ​​the third shell 117, and further enhance the heat dissipation capacity of the control component 100.

[0051] The power supply unit 13 includes a battery cavity 131 disposed in the receiving space 113 and a battery 132 inserted in the battery cavity 131. Specifically, the battery cavity 131 is engaged between the first shell 111 and the second shell 112, and the battery cavity 131 has a snap portion 13 that snaps with the first shell 111 and the second shell 112. Furthermore, a plug seat (not shown) for electrically connecting the drive unit 12 and the battery 132 is provided at the bottom of the battery cavity 131, and a side wall of the battery cavity 131 is disposed toward the air inlet 141, while the cooling air duct 143 extends around the battery cavity 131 and is finally connected to the wind gathering member 146 and / or the air outlet 142 to achieve heat dissipation of the power supply unit 13.

[0052] It should be noted that the control component 100 of the present invention also has other units for manipulating the operation of the control component 100, such as the switch unit 15, etc., and its specific structure is the same as or similar to the switch unit in the prior art, so it is not repeated here. It should be understood that although the description of well-known structures and technologies is omitted in the specification, it is only to avoid unnecessary confusion of the concept of the present invention, and it should not be directly understood that the present invention is not provided with or does not include it.

[0053] See also Figure 6 As shown, an electric cutting tool 300 provided by the present invention is shown. The electric cutting tool 300 includes a working component 200 for performing gardening tasks and a control component for controlling the operation of the working component 200. It should be noted that the control component in this embodiment is the aforementioned control component 100, so the following description will only describe the working component 200 in detail, and the repeated parts will not be repeated here.

[0054] The working assembly 200 of the present invention is a cutter working assembly for performing cutting tasks, including a cutter unit 21 , a transmission unit 22 that is transmission-connected between the cutter unit 21 and the driving unit 12 , and a spray unit 23 that is arranged corresponding to the cutter unit 21 .

[0055] See also Figure 6 and Figure 7 As shown, the cutting knife unit 21 is used to complete the corresponding cutting task under the driving action of the driving motor 121. In the present invention, the cutting knife unit 21 includes a protective cover 211 rotatably connected to the end of the transmission unit 22 in the extending direction and a cutting blade 211 rotatably accommodated in the anti-slip cover 211. In a preferred embodiment of the present invention, the protective cover 211 is arranged roughly in a semicircular shape and can rotate around the cutting blade 212. Such an arrangement can, on the one hand, prevent the operator from accidentally touching the working component 200 in the working state when using the electric cutting tool 300, thereby causing harm to the body; on the other hand, it can effectively prevent the dust or waste liquid generated by the cutting blade 212 from splashing during the rotation process, thereby effectively improving the practicality of the electric cutting tool 300.

[0056] See also Figure 7 to Figure 11 As shown, the transmission unit 22 is used to transmit and connect the drive motor 121 and the cutting blade unit 21. In the present invention, the transmission unit 22 includes a support arm 221 detachably connected to the third shell 117, a transmission shaft 222 accommodated in the support arm 221, and an output shaft 223 for connecting the cutting blade 212.

[0057] Specifically, the support arm 221 is hollow, the transmission shaft 222 is rotatably accommodated in the support arm 221 through the bearing 224, and the drive shaft of the drive motor 121 penetrates the third housing 117 and protrudes into the support arm 221 to be transmission-connected with the transmission shaft 222 accommodated in the support arm 221. In the present invention, the end of the drive shaft in the extension direction is connected to the transmission shaft 222 through the coupling 224. In fact, since the drive shaft and the transmission shaft 222 are prone to vibration during the transmission connection process, the coupling 225 in this embodiment is a flower-shaped coupling made of polyurethane material.

[0058] In particular, since the ratio of the radius of the transmission shaft 222 and the cutting blade 212 will directly affect the working time of the working component 200 and the efficiency and stability of cutting during the transmission process of the transmission unit 22, in a preferred embodiment of the present invention, the length of the transmission shaft 222 is 80-200mm and the radius of the cutting blade 212 is 100-200mm.

[0059] Furthermore, the angle between the drive shaft, the transmission shaft 222 and the horizontal plane will also directly affect the center of gravity balance performance of the electric cutting tool 300. Therefore, in a preferred embodiment of the present invention, the angle between the drive shaft, the transmission shaft 222 and the horizontal plane is 15 to 45°. Preferably, the angle between the drive shaft, the transmission shaft 222 and the horizontal plane is 30°, so as to improve the operator's control stability while achieving the balance of the electric cutting tool 300.

[0060] The output shaft 223 is used to connect the transmission unit 22 and the cutting blade unit 21. In the present invention, one end of the output shaft 223 passes through the protective cover 211 to connect with the cutting blade 212 accommodated in the protective cover 211, and the center of the cutting blade 212 is provided with a connecting hole 213 (such as Figure 7 ), that is, in the present invention, the output shaft 223 passes through the protective cover 211 and the connecting hole 213 and is connected to the cutting unit 21.

[0061] Furthermore, the other end of the output shaft 223 is connected to the other end of the transmission shaft 222 through the bevel gear 226, so that the output shaft 223 and the transmission shaft 222 are arranged at a certain angle to facilitate observation of the cutting position of the cutting blade 212. Preferably, the output shaft 223 in the present invention is arranged perpendicular to the transmission shaft 222 through the bevel gear 226.

[0062] In particular, since the bevel gear 226 is affected by the interaction force of the cutting blade 212 rotating and cutting the object during the transmission connection between the transmission shaft 222 and the cutting knife unit 21, the bevel gear 226 has a force on the transmission shaft 222 along the transmission shaft 222 toward the drive shaft. Therefore, in order to prevent the aforementioned force from affecting the drive motor 121, the support arm 221 also has a positioning member 227 for positioning the bearing 224. Preferably, the positioning member 327 is arranged on the transmission shaft 322 and is a metal bolt (unnumbered) for fixing the connection position of the bearing 324. Of course, in other embodiments of the present invention, the positioning member 327 can also be other metal parts or U-shaped parts for implementing positioning. The specific structure and form of the invention, namely the positioning member 227, can be selected according to actual needs and are not limited here.

[0063] In addition, it should be noted that since the motor power, the rotation speed of the cutting blade 212 and the reduction ratio between the drive unit 12 and the transmission unit 22 will directly affect the working time, working efficiency and energy consumption of the electric cutting tool 300 in the present invention, in order to enable the electric cutting tool 300 to achieve efficient cutting; in the present invention, the reduction transmission ratio of the bevel gear 226 is 2 to 6. Preferably, the battery 132 is a lithium battery pack with a voltage of 60 to 82V, and the power of the driving motor 121 is 1000-3500W, so that the cutting speed of the cutting blade 212 reaches 3500-6000rpm.

[0064] The spray unit 23 is used to connect to an external water supply unit (not shown) to spray the cutter unit 21 in operation, thereby cooling the cutter unit 21 and preventing dust from splashing during the cutting process. In the present invention, the spray unit 23 includes a spray component 231 attached to the cutter unit 21, a control valve 232 for controlling the spray state of the spray component 231, and an external connector 233 for connecting to the external water supply unit, and the spray component 231, the control valve 232 and the external connector 233 are connected by a pipeline 234.

[0065] Specifically, the spray component 231 is arranged in a "U" shape and is clamped on the edge of the protective cover 211. Further, nozzles 2311 are provided at both ends of the spray component 231. The nozzles 2311 are clamped on both sides of the cutting blade 212 through the spray component 231 to spray both sides of the cutting blade 212 at the same time. Further, the control valve 232 is connected to the spray component 231 through a pipeline 234, and in a preferred embodiment of the present invention, the control valve 232 is arranged beside the second housing 112. Such an arrangement can facilitate the operator to control the spray unit 23. In other embodiments of the present invention, the control valve 232 can also be arranged at other positions, as long as it is ensured.

[0066] The external connector 233 is used to connect the external water supply unit. In the present invention, the external connector 233 is also connected to the control valve 232 through the pipeline 234, and the external connector 233 and the pipeline 234 are detachably connected. That is, in the present invention, the external connector 233 can be selected according to actual needs and the specific structure of the external water supply unit, and is not limited here.

[0067] To sum up, the control component 100 of the present invention can effectively cool the drive unit 12 and the power supply unit 13 housed in the shell 11 while ensuring that the control component 100 has a small volume by setting a cooling structure 14 formed in the shell 11, thereby further making the electric cutting tool 300 using the control component 100 compact in structure, small in space, and easy to operate, effectively improving the working efficiency of the electric cutting tool 300, extending its service life, and facilitating the promotion and use of the electric cutting tool 300.

[0068] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. An electric cutting tool, comprising a working component and a control component for controlling the working component, the control component comprising: A housing, the housing comprising at least a first housing, a second housing that are engaged with each other, and a receiving space formed by the first housing and the second housing; a driving unit, the driving unit being received in the receiving space and being used for driving the working component; A power supply unit, the power supply unit comprising a battery cavity arranged in the receiving space and a battery inserted in the battery cavity; The invention is characterized in that: a cooling structure for cooling the drive unit and the power supply unit is formed in the shell, the cooling structure includes an air inlet arranged on the first shell, an air outlet arranged on the second shell, and a cooling air duct connecting the air inlet and the air outlet, the drive unit includes a fan protruding into the cooling air duct, the fan drives the cooling gas outside the control component to flow through the power supply unit and the drive unit through the air inlet along the cooling air duct and be discharged from the air outlet; the shell includes a third shell for fixing the drive unit, and the cooling structure also includes a An air gathering component is arranged in the cooling air duct and corresponding to the drive unit, and an air inlet passage for air intake is formed between the air gathering component and the third shell; a side wall of the battery cavity is arranged toward the air inlet, and the cooling air duct extends around the battery cavity and is finally connected with the air gathering component and / or the air outlet; the air gathering component is at least covered on the fan, and the air gathering component has an exhaust port arranged toward the air outlet, and the cooling gas flows through the power supply unit and the drive unit along the cooling air duct via the air inlet, enters the air gathering component, and is finally discharged through the exhaust port and the air outlet.

2. The electric cutting tool according to claim 1, characterized in that: The driving unit includes a driving motor connected to the front end of the shell and an electronic control unit for controlling the driving motor. One end of the driving motor is detachably connected to the shell and is drivingly connected to the working component, and the other end is connected to the fan.

3. The electric cutting tool according to claim 2, characterized in that: The driving motor passes through the third housing, and the electronic control unit is arranged inside the third housing and accommodated in the accommodation space.

4. The electric cutting tool according to claim 3, characterized in that: The third shell is buckled on the front ends of the first shell and the second shell and is made of metal material. At least one heat dissipation rib is arranged on the inner side of the third shell.

5. The electric cutting tool according to claim 2, characterized in that: The electronic control unit is arranged around the driving motor. The electronic control unit is provided with at least one MOS tube, and the at least one MOS tube is arranged close to the driving motor to accelerate heat dissipation when the fan is used.

6. The electric cutting tool according to claim 1, characterized in that: The air inlet is arranged on the side wall of the first shell and is formed by the first shell being recessed inwardly. An air inlet baffle is also arranged on the outer side of the air inlet, and a filter component is arranged between the air inlet baffle and the air inlet.

7. The electric cutting tool according to claim 1, characterized in that: The control assembly further includes a first handle assembly formed on the first shell and / or the second shell, a second handle assembly arranged around the first shell, and a base detachably connected to the lower part of the shell.

8. The electric cutting tool according to claim 1, characterized in that: The working assembly comprises a cutting knife unit, a transmission unit for transmission connection between the cutting knife unit and the driving unit, and a spray unit for spraying the cutting knife unit.

9. The electric cutting tool according to claim 8, characterized in that: The spray unit is connected to an external water supply unit, and includes a spray component attached to the cutter unit, a control valve for controlling the spray state of the spray component, and an external connector for connecting to the external water supply unit, and the spray component, the control valve and the external connector are connected by a pipeline.

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