CN111559015A - Electric cutting tool - Google Patents

Abstract

The invention provides an electric cutting tool, which comprises a working assembly and a control assembly for controlling the working assembly, wherein the control assembly comprises: the cooling structure comprises an air inlet arranged on the first shell, an air outlet arranged on the second shell and a cooling air channel connected with the air inlet and the air outlet, the driving unit comprises a fan protruding into the cooling air channel, and cooling air outside the control assembly driven by the fan flows through the power supply unit and the driving unit along the cooling air channel through the air inlet and is discharged from the air outlet. The electric cutting tool provided by the invention can effectively cool the driving unit and the power supply unit accommodated in the shell through the control assembly with the cooling structure, thereby improving the working efficiency of the electric cutting tool using the control assembly, prolonging the service life, and simultaneously ensuring compact structure, small occupied space and convenient operation.

Description

electric cutting tool

technical field

The present invention relates to an electric cutting tool.

Background technique

As a portable cutting tool, the electric cutting tool can perform cutting operations on materials such as stone, concrete or wood using a cutting disc rotatably mounted on a stand.

In fact, in the high-power hand-held electric cutting tool, in order to facilitate its operation and use, it is necessary to realize the miniaturization of the size and at the same time have a good cooling effect, so as to further ensure the use effect of the high-power hand-held electric cutting tool.

Although the existing high-power hand-held electric cutting tools have a corresponding cooling structure, the conventional cooling structure usually only cools the driving motor. The internal motor cools down, but because the water-cooling structure needs to provide 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 the cooling pipelines will lead to The increase in the volume of the electric cutting tool is not conducive to the miniaturization of the electric cutting tool, resulting in limited promotion of the electric cutting tool in the prior art. Furthermore, due to the high power of the battery pack used in the high-power hand-held electric cutting tool, the temperature of the corresponding circuit control device rises rapidly, and a simple and reliable cooling structure needs to be provided 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

The object of the present invention is to provide an electric cutting tool with a control assembly. The electric tool has a control assembly with a cooling structure formed in a housing, which can ensure that the control assembly has a small volume and can be stored in the housing. The drive unit and the power supply unit in the body are effectively cooled to ensure the compact structure, small occupied space and convenient operation of the electric cutting tool using the control assembly.

In order to achieve the above object of the invention, the present invention provides an electric cutting tool, which includes a working assembly and a control assembly for controlling the working assembly, the control assembly includes: a casing, and the casing at least includes a snap-fitted a first casing, a second casing, and an accommodating space formed by the first casing and the second casing; a driving unit, which is accommodated in the accommodating space and used to drive the a working assembly; a power supply unit, the power supply unit includes a battery cavity provided in the receiving space and a battery inserted in the battery cavity; a power supply unit for cooling the drive unit and the power supply unit is formed in the casing The cooling structure comprises an air inlet provided on the first casing, an air outlet provided on the second casing, 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, and the fan drives the cooling air outside the control assembly to flow through the power supply unit and the driving unit through the air inlet along the cooling air duct and discharged from the air outlet.

As a further improvement of the present invention, the cooling structure further includes an air collecting member covering at least the fan, the air collecting member has an air exhaust port disposed toward the air outlet, and the cooling gas passes through the air outlet. The air inlet flows through the power supply unit and the driving unit along the cooling air duct, enters the air collecting member, and is finally discharged through the air outlet and the air outlet.

As a further improvement of the present invention, the drive unit includes a drive motor connected to the front end of the housing and an electronic control unit for controlling the drive motor, and one end of the drive motor is detachably connected to the housing It is drivingly connected with the working assembly, and the other end is connected with the fan.

As a further improvement of the present invention, the casing includes a third casing for fixing the driving unit, the driving motor penetrates the third casing, and the electronic control unit is disposed in the third casing inside and accommodated in the accommodating space.

As a further improvement of the present invention, the third shell is fastened to the front ends of the first shell and the second shell, and is made of metal material, and the inner side of the third shell is provided with At least one cooling rib.

As a further improvement of the present invention, the electronic control unit is arranged around the driving motor, the electronic control unit is provided with at least one MOS transistor, and the at least one MOS transistor is arranged close to the driving motor, so as to prevent the fan used to accelerate heat dissipation.

As a further improvement of the present invention, the air inlet is arranged on the side wall of the first casing and is formed by the inward depression of the first casing, and an air inlet baffle is also provided on the outside of the air inlet. And a filter member is arranged between the air inlet baffle and the air inlet.

As a further improvement of the present invention, the control assembly further includes a first handle assembly formed on the first casing and/or the second casing, and a second handle assembly disposed around the first casing and a base detachably connected to the lower part of the housing.

As a further improvement of the present invention, the working assembly includes a cutter unit, a transmission unit for drivingly connecting the cutter unit and the drive unit, and a spray unit for spraying the cutter unit.

As a further improvement of the present invention, the spray unit is connected with an external water supply unit, and the spray unit includes a spray member attached to the cutter unit, a spray member for controlling the spray state of the spray member A control valve and an external joint for connecting the external water supply unit, and the spray member, the control valve and the external joint are connected through a pipeline.

The beneficial effect of the present invention is that the control assembly of the present invention can effectively cool the drive unit and the power supply unit accommodated in the casing while ensuring the control assembly has a small volume by providing the cooling structure formed in the casing. The cooling further makes the electric cutting tool using the control assembly compact in structure, takes up less space and is convenient to operate, improves the working efficiency of the electric cutting tool and prolongs the service life.

Description of drawings

FIG. 1 is a schematic perspective view of the control assembly of the present invention.

FIG. 2 is a disassembled schematic diagram of the control assembly in FIG. 1 .

FIG. 3 is a schematic diagram of the internal structure of the control assembly in FIG. 1 omitting the second casing, the battery and the driving unit.

FIG. 4 is a disassembled schematic diagram of another angle of the first housing in FIG. 1 .

FIG. 5 is a schematic structural diagram of the third casing in FIG. 1 when assembled with the driving unit.

FIG. 6 is a perspective view of the electric cutting tool of the present invention.

FIG. 7 is a disassembled schematic diagram of the electric cutting tool in FIG. 6 .

FIG. 8 is a schematic structural diagram of the transmission unit in FIG. 6 when the drive unit is connected.

FIG. 9 is a schematic structural diagram of the transmission unit in FIG. 6 .

FIG. 10 is a disassembled schematic diagram of another angle of the transmission unit in FIG. 6 .

Fig. 11 is the disassembled schematic diagram when the transmission unit is connected with the cutter unit in Fig. 6

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Examples of these preferred embodiments are illustrated in the accompanying drawings. The embodiments of the invention shown in the drawings and described with reference to the drawings are merely exemplary and the invention is not limited to these embodiments.

Here, 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 solution of the present invention are shown in the drawings, and the Invent other details that are less relevant.

In addition, it should be noted that the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device comprising a series of elements includes not only those elements, but also Also included are other elements not expressly listed or inherent to such a process, method, article or apparatus.

Referring to FIG. 1 , the control assembly 100 provided by the present invention is used to control the work unit 200 to complete corresponding garden work tasks. In the present invention, the control assembly 100 includes a housing 11 , a driving unit 12 accommodated in the housing 11 , and a power supply unit 13 .

Referring to FIGS. 1 and 2 , the longitudinal extension direction of the casing 11 is defined as the positive direction, and the end for connecting and fixing the working unit 200 is the front end, and the end away from the working unit 200 is the tail end, then the casing 11 includes The first casing 111 disposed on both sides in the positive direction, the second casing 112 corresponding to the first casing 111 , and the receiving space 113 formed by the first casing 111 and the second casing 112 are jointly enclosed and formed.

The first casing 111 and the second casing 112 are arranged to engage with each other. Further, the casing 11 further includes a first handle assembly 114 disposed at the rear end thereof. In a preferred embodiment of the present invention, the first handle assembly 114 is surrounded by the first shell 111 and the second shell 112, that is, the first handle assembly 114 and the shell 11 are integrally formed, and this arrangement enhances the stability of the connection between the first handle assembly 114 and the shell 11 on the one hand. On the other hand, the production steps and processes of the casing 11 are simplified, and the purpose of reducing the production cost of the control assembly 100 is achieved. Of course, in other embodiments of the present invention, the first handle assembly 114 may also be separately formed on the first casing 111 and/or the second casing 112 , or the first handle assembly 114 may also be separate from the casing 11 . For setting, it is only necessary to ensure the stability of the connection between the rear first handle assembly 114 and the housing 11 .

Further, the casing 11 further includes a second handle assembly 115 located at the front end of the casing 11 and detachably connected to the casing 11 . The first fixing portion 1152 and the second fixing portion 1153 are located at both ends of the holding portion 1151 .

The holding portion 1151 extends from one end of the first fixing portion 1152 in a direction away from the second casing 12 and is disposed around the first casing 111 , so that the first casing 111 is surrounded and protected by the holding portion 151 , The collision between the first casing 111 and the outside world is effectively avoided, thereby simplifying the strengthening structure or setting thickness of the first casing 111, reducing the manufacturing cost of the first casing 111, and further achieving the purpose of reducing the production cost of the control assembly 100. .

Further, the first fixing portion 1152 is detachably connected to the bottom of the first housing 111 and/or the second housing 112, and the second fixing portion 1153 is detachably connected to the side wall of the second housing 112, and in this case In the embodiment, the bottoms of the first casing 111 and the second casing 112 are further provided with grooves (not numbered) for holding the first fixing portion 1152, so that the first fixing portion 1152 is accommodated in the grooves. , the outer surface of the first fixing portion 1152 is flush with the bottom of the housing 11 or lower than the bottom of the housing 1 , so that the control assembly 100 can be stably placed on the table.

In a preferred embodiment of the present invention, the casing 11 further has a base 116 disposed at the lower front end of the base 116, and the base 116 is used to support the casing 11, so that the control assembly 100 has a high supporting strength, and in this embodiment In an example, the first fixing portion 1152 penetrates through the base 116 to be connected and positioned with the liftable 11 . This arrangement can facilitate the connection and installation of the second handle assembly 115 and the housing 11 .

Please refer to FIG. 1 to FIG. 5 together, the housing 11 is further 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 provided on the first housing 111 , an air outlet 142 provided on the second housing 112 , and a cooling air duct 143 connecting the air inlet 141 and the air outlet 142 .

In the present invention, the air inlet 141 is disposed on the side wall of the first casing 111 and is formed by the inward depression of the first casing 111. Further, the air inlet 141 has a plurality of grids (not shown) arranged in parallel, so that The arrangement can effectively prevent large-sized sundries from entering the receiving space 113 during the use of the control assembly 100 .

In a preferred embodiment of the present invention, an air inlet baffle 144 is further provided on the outside of the air inlet 141, and a filter member (not shown) is also arranged between the air inlet baffle 144 and the air inlet 141. In the embodiment, the filter member position can be used as a filter layer for absorbing debris such as dust and damp gas. Preferably, the filter layer is composed of a material with filter holes, such as sponge, filter screen or gauze, etc. This arrangement can effectively avoid impurities. Entering the housing space 113 of the housing 11 , the cooling gas entering the cooling air duct through the air inlet baffle 144 , the filter member and the air inlet 141 is clean, which can effectively protect the service life of the drive unit 12 .

Further, the air inlet baffle 144 is detachably connected to the first housing 111. In this way, the replacement of the filter member can be completed by removing the air inlet baffle 144, so as to prevent debris from clogging the filter holes of the filter member and ensure that the filter member filter effect.

The air outlet 142 is disposed on the opposite side wall of the second casing 112 and the first casing 111 , and the size of the air inlet 141 is larger than the size of the air outlet 142 . This arrangement can effectively improve the cooling gas entering the accommodating space 113 To ensure the heat exchange efficiency of the cooling structure 14, and further, the air outlet 142 is disposed toward the side of the second housing 112 to prevent the position of the air outlet from affecting the use of the operator by the operator.

The cooling air duct 143 is arranged around the power supply unit 13 accommodated in the accommodating space 113, and the setting position of the cooling air duct 143 passes through the power supply unit 13 and the driving unit 12 at the same time. The drive unit 12 and the power supply unit 13 are in full contact, which further improves 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 casing 111 , and the air outlet 142 is located at the front end of the second casing 112 , so that the cooling air duct 143 is arranged in an “L” shape. , while ensuring the heat exchange efficiency of the cooling structure 14 , and ensuring that the power supply unit 13 has a smaller volume. Of course, in other embodiments of the present invention, the cooling air duct 143 may also be provided in other shapes, as long as the heat exchange cooling effect of the pillow cooling structure 14 is sufficient.

The cooling structure 14 further includes an air collecting member 146 disposed in the cooling air duct 143 and corresponding to the driving unit 12 . The air collecting member 146 is used to collect the cooling gas entering the cooling air duct 143 through the air inlet 141 and make the cooling gas It is in sufficient contact with the driving unit 12 to reduce the operating temperature of the driving unit 12 and ensure the battery life when the control assembly 100 drives the working unit 200 .

In a preferred embodiment of the present invention, the wind collecting member 146 is detachably connected to the front end of the casing 11, and the casing 11 also has a third casing 117 for connecting and fixing the wind collecting member 146. Specifically, The third housing 117 is fastened to the front ends of the first housing 141 and the second housing 142 to close the housing space 113 formed in the housing 11 , and is arranged in this way to prevent dust or debris generated during the working process of the working unit 200 . The sewage enters the receiving space 113 along the gap where the first casing 111 and the second casing 112 are engaged, thereby affecting the normal operation of the driving unit 12 and the power supply unit 13 .

In the present embodiment, the driving unit 12 protrudes through the third housing 117 and protrudes into the air duct 143 in the cold area, and is connected to the third housing 117 for positioning. The air collecting member 146 has an air exhaust port 147 for exhausting air. In this embodiment, the air exhaust port 147 is arranged toward the air outlet 142, so as to collect the air along the exhaust port in the air collecting member 146. 147 is led out through the air outlet 142 .

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 the PCB board 122, the drive motor 121 is detachably connected to the housing 11, and the drive motor 121 has a drive shaft (not numbered) that drives the working unit 200 and the fan 123 at the same time. One end of the shaft is drivingly connected with the working unit 200, and the other end is connected with the fan 123, and the fan 123 protrudes into the cooling air duct 143. Further, the wind collecting member 146 is covered with the fan 123 and the driving motor 121, and the wind collecting member An air intake channel (not numbered) for air intake is formed between 146 and the third housing 117. At this time, the cooling airflow outside the control assembly 100 can be driven by the fan 123 through the air inlet 141 along the cooling air channel 143. The air flows through the power supply unit 13 , and further enters the air collecting member 146 through the air inlet channel between the air collecting member 146 and the third housing 117 , so that the cooling gas can sufficiently cool down the driving motor 121 , and finally passes through the air exhaust port 147 And the air outlet 142 is discharged.

The PCB board 122 is fixed inside the housing 11, and the setting position of the cooling air duct 143 passes through the fixing position of the PCB board 122. In the present invention, the PCB board 122 is set on the inner side of the third housing 117. The form of threaded connection is fixed. Specifically, the PCB board 122 is arranged around the driving motor 121, so that the PCB board 122 is arranged in a C-shaped or L-shaped or circular or linear arrangement structure. Further, on the PCB board 122 There are a plurality of MOS transistors 1221 for controlling the voltage of the control assembly 100 , and the plurality of MOS transistors 1221 are arranged close to the driving motor 121 . In this way, when the cooling gas passes through the inlet between the wind collecting member 146 and the third casing 117 , When the air channel enters the air collecting member 146, the cabinet PCB board 122 can be cooled simultaneously.

In a preferred embodiment of the present invention, the third casing 117 is a metal casing made of a metal casing material. At this time, the PCB board 122 can also be dissipated through the third casing 117. Preferably, the first The three housings 117 are also provided with a plurality of heat dissipation ribs 118 , which can effectively increase the heat dissipation area of the third housing 117 and further improve the heat dissipation capability of the control assembly 100 .

The power supply unit 13 includes a battery cavity 131 disposed in the receiving space 113 and a battery 132 inserted into the battery cavity 131 . Specifically, the battery cavity 131 is engaged between the first casing 111 and the second casing 112 , and the battery cavity 131 has a buckle portion 13 that is buckled with the first casing 111 and the second casing 112 , and further The bottom of the battery cavity 131 is provided with a plug socket (not shown) for electrically connecting the drive unit 12 and the battery 132, and one side wall of the battery cavity 131 is disposed toward the air inlet 141, and the cooling air duct 143 surrounds the The battery cavity 131 extends and finally communicates with the air collecting member 146 and/or the air outlet 142 to realize heat dissipation of the power supply unit 13 .

It should be noted that the control assembly 100 of the present invention also has other units for manipulating the operation of the control assembly 100, such as the switch unit 15, etc., whose 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 does not have or does not include.

Please refer to FIG. 6 , which is an electric cutting tool 300 provided by the present invention. The electric cutting tool 300 includes a working assembly 200 for performing garden work tasks and a control assembly for controlling the operation of the working assembly 200. It should be noted that the control assembly in this embodiment is the aforementioned control assembly 100, so the following description Parts will only be described in detail with respect to the working assembly 200, and repeated parts will not be repeated here.

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 drives the cutter unit 21 and the drive unit 12 , and a spray unit corresponding to the cutter unit 21 twenty three.

Please refer to FIG. 6 and FIG. 7 , the cutter unit 21 is used to complete the corresponding cutting task under the driving action of the driving motor 121 . In the present invention, the cutter unit 21 includes an end rotatably connected to the extension direction of the transmission unit 22 . The protective cover 211 and the cutting blade 211 rotatably accommodated in the anti-skid cover 211 are provided. In a preferred embodiment of the present invention, the protective cover 211 is arranged in a substantially semicircular shape and can rotate around the cutting blade 212. This arrangement, on the one hand, can prevent the operator from accidentally touching the electric cutting tool 300 when it is working. On the other hand, it can effectively prevent dust or waste liquid generated during the rotation of the cutting blade 212 from splashing, thereby effectively improving the practicability of the electric cutting tool 300 .

Referring to FIGS. 7 to 11 , the transmission unit 22 is used for drivingly connecting the driving motor 121 and the cutter unit 21 . In the present invention, the transmission unit 22 includes a support arm 221 , which is detachably connected to the third housing 117 , The transmission shaft 222 accommodated in the support arm 221 and the output shaft 223 for connecting the cutting blade 212 are provided.

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 through the third housing 117 and protrudes into the support arm 221 and is accommodated in the support arm 221 . The drive shaft 222 in 221 is drive-connected. In the present invention, the end of the drive shaft in the extending direction is connected with 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 in this embodiment is The device 225 is a flower-shaped coupling made of polyurethane material.

In particular, during the transmission process of the transmission unit 22, the ratio of the radius of the transmission shaft 222 to the cutting blade 212 will directly affect the working time of the working assembly 200 and the cutting efficiency is very stable. Therefore, in a preferred embodiment of the present invention Among them, the length of the transmission shaft 222 is 80-200mm, and the radius of the cutting blade 212 is 100-200mm.

Further, the angle between the drive shaft, the transmission shaft 222 and the horizontal plane will also directly affect the balance performance of the center of gravity 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 Preferably, the included angle between the drive shaft, the transmission shaft 222 and the horizontal plane is 30°, so as to achieve the balance of the electric cutting tool 300 and improve the operator's control stability.

The output shaft 223 is used to connect the transmission unit 22 and the cutter unit 21. In the present invention, one end of the output shaft 223 penetrates 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 set. There is a connection hole 213 (as shown in FIG. 7 ) for fixedly connecting the output shaft 223 , that is, in the present invention, the output shaft 223 penetrates the protective cover 211 and the connection hole 213 to connect with the cutting unit 21 .

Further, 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, so as to facilitate the observation of the cutting position of the cutting blade 212. Preferably, the output shaft 223 in the present invention is vertically arranged with the transmission shaft 222 through the bevel gear 226 .

In particular, since the bevel gear 226 is influenced by the interaction force of the cutting blade 212 rotating the cutting object in the process of connecting the transmission shaft 222 and the cutter unit 21, the bevel gear 226 has a driving force along the transmission shaft 222 toward the transmission shaft 222. Therefore, in order to prevent the aforementioned force from affecting the driving motor 121, the support arm 221 also has a positioning member 227 for positioning the bearing 224. Preferably, the positioning member 327 is provided on the transmission shaft 322 and is Metal bolts (not numbered) used to fix 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 used to implement the clamping position. The invention is that The specific structure and form of the positioning member 227 can be selected according to actual needs, which is not limited herein.

In addition, it should be noted that, since the motor power, the rotational speed of the cutting blade 212 and the reduction ratio between the driving 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, it is Make the electric cutting tool 300 realize efficient cutting; in the present invention, the reduction gear ratio of the bevel gear 226 is 2-6, preferably, the battery 132 is a lithium battery pack with a voltage of 60-82V, and the power of the driving motor 121 is 1000-3500W, So that the cutting speed of the cutting blade 212 reaches 3500-6000 rpm.

The spray unit 23 is used to connect an external water supply unit (not shown) to spray the cutter unit 21 in a working state, so as to cool the cutter unit 21 and prevent dust from splashing during the cutting process. In the present invention, the spraying unit 23 includes a spraying member 231 attached to the cutter unit 21, a control valve 232 for controlling the spraying state of the spraying member 231, and an external connector 233 for connecting to an external water supply unit, And the spray member 231 , the control valve 232 and the external joint 233 are connected through the pipeline 234 .

Specifically, the spraying member 231 is arranged in a “U” shape and is clamped on the edge of the protective cover 211 . Further, both ends of the spraying member 231 are provided with nozzles 2311 , and the nozzles 2311 are clamped by the spraying member 231 . On both sides of the cutting blade 212 to spray both sides of the cutting blade 212 at the same time. Further, the control valve 232 is communicated with the spray member 231 through the pipeline 234, and in a preferred embodiment of the present invention, the control valve 232 is arranged on the side of the second housing 112, so that it is convenient for the operator To control the spray unit 23, in other embodiments of the present invention, the control valve 232 can also be set at other positions, which only needs to be ensured.

The external joint 233 is used to connect the external water supply unit. In the present invention, the external joint 233 is also connected to the control valve 232 through the pipeline 234, and the external joint 233 is detachably connected to the pipeline 234, that is, in the present invention, the external joint 233 It can be selected according to actual needs and the specific structure of the external water supply unit, which is not limited here.

To sum up, in the control assembly 100 of the present invention, the cooling structure 14 formed in the casing 11 can ensure the control assembly 100 has a small volume, and at the same time, the drive unit 12 and the power supply unit housed in the casing 11 can be cooled. 13. Effective cooling and cooling, which further makes the electric cutting tool 300 using the control assembly 100 compact in structure, takes up less space and is convenient to operate, effectively improves the working efficiency of the electric cutting tool 300, prolongs its service life, and is conducive to electric cutting Promotion and use of tool 300.

The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced. Without departing from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. An electric cutting tool, comprising a working assembly and a control assembly for controlling the working assembly, the control assembly comprising: a casing, the casing at least includes a first casing, a second casing arranged in a snap fit, and a receiving space jointly enclosed and formed by the first casing and the second casing; a driving unit, which is accommodated in the accommodation space and used to drive the working assembly; a power supply unit, the power supply unit includes a battery cavity provided in the accommodation space and a battery inserted in the battery cavity; It is characterized in that: a cooling structure for cooling the driving unit and the power supply unit is formed in the housing, and the cooling structure comprises an air inlet provided on the first housing, an air inlet provided on the second housing an air outlet on the body 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, and the fan drives the cooling air outside the control assembly to pass through The air inlet flows through the power supply unit and the driving unit along the cooling air duct and is discharged from the air outlet. 2 . The electric cutting tool according to claim 1 , wherein the cooling structure further comprises an air collecting member covering at least the fan, and the air collecting member has an air outlet disposed toward the air outlet. 3 . an air outlet, the cooling gas flows through the power supply unit and the driving unit through the cooling air channel through the air inlet, enters the air collecting member, and is finally discharged through the air outlet and the air outlet . 3. The electric cutting tool according to claim 1, wherein the drive unit comprises a drive motor connected to the front end of the housing and an electronic control unit for controlling the drive motor, and the drive motor has an electronic control unit. One end is detachably connected to the casing and is drivingly connected to the working assembly, and the other end is connected to the fan. 4 . The electric cutting tool according to claim 3 , wherein the housing comprises a third housing for fixing the driving unit, the driving motor penetrates through the third housing, and the electronic The control unit is arranged inside the third housing and accommodated in the accommodating space. 5. The electric cutting tool according to claim 4, wherein the third casing is fastened to the front ends of the first casing and the second casing, and is made of metal material, and At least one heat dissipation rib is arranged on the inner side of the third casing. 6 . The electric cutting tool according to claim 3 , wherein the electronic control unit is arranged around the drive motor, the electronic control unit is provided with at least one MOS transistor, and the at least one MOS transistor is close to the drive motor. 7 . The drive motor is arranged to accelerate heat dissipation under the use of the fan. 7 . The electric cutting tool according to claim 1 , wherein the air inlet is provided on the side wall of the first casing and is formed by the inward depression of the first casing, and the air inlet is 7 . The outer side of the air inlet is also provided with an air inlet baffle, and a filter member is arranged between the air inlet baffle and the air inlet. 8. The electric cutting tool according to claim 1, wherein the control assembly further comprises a first handle assembly formed on the first casing and/or the second casing, surrounding the The second handle assembly provided on the first casing and the base detachably connected to the lower part of the casing. 9. The electric cutting tool according to claim 1, characterized in that: the working assembly comprises a cutter unit, a transmission unit that drives the cutter unit and the drive unit and is used for spraying the cutter The sprinkler unit of the unit. 10. The electric cutting tool according to claim 9, wherein the spray unit is connected with an external water supply unit, and the spray unit comprises a spray member attached to the cutter unit for A control valve for controlling the spraying state of the spraying member and an external joint for connecting the external water supply unit, and the spraying member, the control valve and the external joint are connected through a pipeline.

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