CN111559015A

CN111559015A - Electric cutting tool

Info

Publication number: CN111559015A
Application number: CN202010544115.2A
Authority: CN
Inventors: 王海滨; 张林高
Original assignee: Globe Jiangsu Co Ltd
Current assignee: Globe Jiangsu Co Ltd
Priority date: 2020-06-15
Filing date: 2020-06-15
Publication date: 2020-08-21

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

A power cutting tool is a portable cutting tool that performs a cutting operation on a material such as stone, concrete, or wood using a cutting disc rotatably mounted at a support.

In fact, in order to facilitate the operation and use of the high-power handheld electric cutting tool, the high-power handheld electric cutting tool needs to have a good cooling effect while realizing the miniaturization of the volume, so as to further ensure the use effect of the high-power handheld electric cutting tool.

Although the conventional high-power handheld electric cutting tool has a corresponding cooling structure, the conventional cooling structure generally only cools a driving motor, and in the prior art, a water cooling form is adopted to spray a cutting knife blade and cool an internal motor at the same time, but a complex water cooling pipeline is required to be provided for the water cooling structure, so that the cooling pipeline cannot be accurately laid to each position of the electric cutting tool, and the cooling effect is limited; on the other hand, the laying of the cooling pipeline will lead to the volume increase of the electric cutting tool, which is not beneficial to the volume miniaturization of the electric cutting tool, and leads to the limited popularization of the electric cutting tool in the prior art. Moreover, because the battery pack used in the high-power hand-held electric cutting tool has high power, the temperature of the corresponding circuit control device rises quickly, and a simple and reliable cooling structure is needed to ensure the working efficiency of the whole machine. In view of the above, there is a need for a new power cutting tool to solve the above problems.

Disclosure of Invention

The invention aims to provide an electric cutting tool with a control assembly, which can ensure that the control assembly has smaller volume, effectively cool a driving unit and a power supply unit accommodated in a shell and ensure that the electric cutting tool using the control assembly has compact structure, small occupied space and convenient operation.

To achieve the above object, the present invention provides an electric cutting tool including a working assembly and a control assembly for controlling the working assembly, the control assembly including: the shell at least comprises a first shell, a second shell and an accommodating space, wherein the first shell and the second shell are clamped, and the accommodating space is formed by the first shell and the second shell in a surrounding mode; the driving unit is accommodated in the accommodating space and is used for driving the working assembly; the power supply unit comprises a battery cavity arranged in the accommodating space and a battery inserted in the battery cavity; be formed with in the casing and be used for the cooling drive unit with power supply unit's cooling structure, cooling structure is including setting up air intake on the first casing, setting are in air outlet on the second casing and connection the air intake with the cooling wind channel of air outlet, drive unit is including the outstanding fan that stretches into in the cooling wind channel, the fan drives the outer cooling gas of control assembly via the air intake is followed the cooling wind channel flows through power supply unit with drive unit and by the air outlet is discharged.

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

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

As a further improvement of the present invention, the housing includes a third housing for fixing the drive unit, the drive motor penetrates the third housing, and the electronic control unit is disposed inside the third housing and housed in the housing space.

As a further improvement of the present invention, the third housing is fastened to the front ends of the first housing and the second housing, and is made of a metal material, and at least one heat dissipation rib is disposed on the inner side of the third housing.

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

As a further improvement of the present invention, the air inlet is disposed on the side wall of the first housing and formed by the first housing being recessed inward, an air inlet baffle is further disposed outside the air inlet, and a filter member is disposed between the air inlet baffle and the air inlet.

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

As a further improvement of the invention, the working assembly comprises a cutting knife unit, a transmission unit for transmitting and connecting the cutting knife unit and the driving unit, and a spraying unit for spraying the cutting knife unit.

As a further improvement of the present invention, the spraying unit is connected with an external water supply unit, the spraying unit comprises a spraying member attached on the cutter unit, a control valve for controlling a 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 by a pipeline.

The invention has the beneficial effects that: the control assembly can effectively cool the driving unit and the power supply unit accommodated in the shell while ensuring that the control assembly has smaller volume by arranging the cooling structure formed in the shell, so that the electric cutting tool using the control assembly has the advantages of compact structure, smaller occupied space and convenient operation, improves the working efficiency of the electric cutting tool and prolongs the service life.

Drawings

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

Fig. 2 is a broken-away schematic view of the control assembly of fig. 1.

Fig. 3 is an internal structural diagram of the control assembly of fig. 1 with the second housing, the battery, and the drive unit omitted.

Fig. 4 is a schematic view of the first housing of fig. 1 taken apart at another angle.

Fig. 5 is a schematic structural view of the third housing and the driving unit in fig. 1 when assembled.

Fig. 6 is a perspective view of the power cutting tool of the present invention.

Fig. 7 is a disassembled schematic view of the power cutting tool of fig. 6.

Fig. 8 is a schematic view of the structure of fig. 6 when the transmission unit is connected with the driving unit.

Fig. 9 is a schematic view of the structure of the transmission unit of fig. 6.

Fig. 10 is a schematic angular exploded view of the drive unit of fig. 6.

FIG. 11 is a schematic view showing the detachment of the driving unit and the cutter unit in FIG. 6 when they are coupled

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail 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 in accordance with the drawings are exemplary only, and the invention is not limited to these embodiments.

It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.

In addition, it is also to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Referring to fig. 1, a control assembly 100 for controlling a work unit 200 to perform a corresponding garden work task is provided. In the present invention, the control assembly 100 includes a housing 11, a driving unit 12 housed in the housing 11, and a power supply unit 13.

Referring to fig. 1 and fig. 2, the longitudinal extending direction of the housing 11 is defined as a positive direction, and one end of the housing for connecting and fixing the working unit 200 is a front end, and one end of the housing away from the working unit 200 is a tail end, so that the housing 11 includes a first housing 111 disposed at two sides of the positive direction, a second housing 112 disposed corresponding to the first housing 111, and an accommodating space 113 defined by the first housing 111 and the second housing 112.

The first shell 111 and the second shell 112 are arranged in a mutually clamped manner, further, the shell 11 further comprises a first handle assembly 114 arranged at the tail end thereof, in a preferred embodiment of the present invention, the first handle assembly 114 is formed by enclosing the first shell 111 and the second shell 112, that is, the first handle assembly 114 is integrally formed with the shell 11, so that on one hand, the stability of the connection between the first handle assembly 114 and the shell 11 is enhanced; on the other hand, the production steps and the flow of the housing 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 formed on the first shell 111 and/or the second shell 112 separately, or the first handle assembly 114 may also be provided separately from the shell 11, only the stability of the connection between the rear first handle assembly 114 and the shell 11 needs to be ensured.

Further, the housing 11 further includes a second handle unit 115 detachably connected to the housing 11 at a front end of the housing 11, and more specifically, the second handle unit 115 is provided with a grip portion 1151 formed in an arch shape and a first fixing portion 1152 and a second fixing portion 1153 respectively formed at both ends of the grip portion 1151.

The holding part 1151 extends from one end of the first fixing part 1152 to the direction far away from the second shell 12, and is arranged around the first shell 111, so that the first shell 111 is protected by the holding part 151 in a surrounding manner, the first shell 111 is effectively prevented from colliding with the outside, the strengthening structure of the first shell 111 can be simplified or the thickness of the first shell 111 can be reduced, the preparation cost of the first shell 111 is reduced, and the purpose of reducing the production cost of the control assembly 100 is further achieved.

Further, the first fixing portion 1152 is detachably connected to the bottom of the first casing 111 and/or the second casing 112, and the second fixing portion 1153 is detachably connected to the sidewall of the second casing 112, and in this embodiment, the bottom of the first casing 111 and the second casing 112 is further provided with a groove (not numbered) for holding and accommodating the first fixing portion 1152, so that when the first fixing portion 1152 is accommodated in the groove, the outer surface of the first fixing portion 1152 is level with the bottom of the casing 11 or lower than the bottom of the casing 1, so as to facilitate the stable placement of the control assembly 100 on the table.

In a preferred embodiment of the present invention, the housing 11 further has a base 116 disposed at the lower front end thereof, the base 116 is used for supporting the housing 11, so that the control assembly 100 has high supporting strength, and in this embodiment, the first fixing portion 1152 penetrates the base 116 to be connected and positioned with the carrying handle 11, so that the second handle assembly 115 can be conveniently connected and mounted with the housing 11.

Referring to fig. 1 to 5, the housing 11 further forms a cooling structure 14 for cooling the driving unit 12 and the power supply unit 12. Specifically, the cooling structure 14 includes an intake port 141 provided on the first housing 111, an outlet port 142 provided on the second housing 112, and a cooling air duct 143 connecting the intake port 141 and the outlet port 142.

In the present invention, the air inlet 141 is disposed on the side wall of the first casing 111 and formed by the first casing 111 being recessed inwards, and further, the air inlet 141 has a plurality of grid plates (not shown) disposed in parallel, so that the impurities with large volume can be effectively prevented from entering the accommodating space 113 when the control assembly 100 is in use.

In a preferred embodiment of the present invention, an air inlet baffle 144 is further disposed at an outer side of the air inlet 141, and a filtering member (not shown) is further disposed between the air inlet baffle 144 and the air inlet 141, in this embodiment, the filtering member is a filtering layer for absorbing impurities such as dust and wet gas, preferably, the filtering layer is made of a material having filtering holes, such as sponge, filtering net or gauze, so as to effectively prevent the impurities from entering the accommodating space 113 of the housing 11, so that the cooling air entering the cooling air duct through the air inlet baffle 144, the filtering member and the air inlet 141 is clean, and the service life of the driving unit 12 can be effectively protected.

Further, the air inlet baffle 144 and the first shell 111 can be detachably connected, so that the air inlet baffle 144 can be detached to replace the filter element, so as to prevent impurities from blocking the filter holes of the filter element and ensure the filtering effect of the filter element.

The air outlet 142 is arranged on the side wall of the second shell 112 opposite to the first shell 111, and the size of the air inlet 141 is larger than that of the air outlet 142, so that the amount of cooling gas entering the accommodating space 113 can be effectively increased, the heat exchange efficiency of the cooling structure 14 is ensured, and further, the air outlet 142 is arranged towards the side direction of the second shell 112 to prevent the air outlet position from influencing the use of an operator.

The cooling air duct 143 is disposed around the power supply unit 13 accommodated in the accommodating space 113, and the position of the cooling air duct 143 passes through the power supply unit 13 and the driving unit 12 at the same time, so that the cooling air flowing through the cooling air duct 143 can be ensured to be fully contacted with the driving unit 12 and the power supply unit 13, and the heat exchange efficiency of the cooling structure 14 is further improved. 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 disposed in an "L" shape, which can ensure the heat exchange efficiency of the cooling structure 14 and ensure the smaller volume of the power supply unit 13. Of course, in other embodiments of the present invention, the cooling air duct 143 may be disposed in other shapes, and only the heat exchange cooling effect of the pillow cooling structure 14 is required.

The cooling structure 14 further includes a wind collecting member 146 disposed in the cooling air duct 143 and corresponding to the driving unit 12, wherein the wind collecting member 146 is configured to collect the cooling air entering the cooling air duct 143 through the wind inlet 141, and make the cooling air fully contact with the driving unit 12, so as to reduce the usage temperature of the driving unit 12 and ensure the cruising ability of the control assembly 100 when driving the working unit 200.

In a preferred embodiment of the present invention, the wind-gathering member 146 is detachably connected to the front end of the housing 11, and the housing 11 further has a third housing 117 for connecting and fixing the wind-gathering 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 accommodating space 113 formed in the housing 11, and this arrangement can prevent dust or sewage generated during the operation of the operation unit 200 from entering the accommodating space 113 along the gap at the fastening position of the first housing 111 and the second housing 112, and further, can affect the normal operation of the driving unit 12 and the power supply unit 13.

In the present embodiment, the driving unit 12 penetrates the third casing 117 to protrude into the cold air duct 143, and is connected and positioned in the third casing 117, the air collecting member 146 is covered on a portion of the driving unit 12 received in the receiving space 113, and the air collecting member 146 has an air outlet 147 for exhausting air, in the present embodiment, the air outlet 147 is disposed toward the air outlet 142, so as to guide the air collected in the air collecting member 146 along the air outlet 147 out of the air outlet 142.

The driving unit 12 includes a driving motor 121 coupled to a front end of the housing 11, an electronic control unit for controlling the driving motor 121, and a fan 123 coupled to the driving motor 121. Specifically, the electronic control unit is a PCB 122, the driving motor 121 is detachably connected to the housing 11, the driving motor 121 has a driving shaft (not numbered) for driving the working unit 200 and the fan 123 simultaneously, specifically, one end of the driving shaft is drivingly connected to the working unit 200, the other end of the driving shaft is connected to the fan 123, the fan 123 protrudes into the cooling air duct 143, further, the wind collecting member 146 covers the fan 123 and the driving motor 121, and an air inlet channel (not numbered) for inlet air is formed between the wind collecting member 146 and the third housing 117, at this time, a cooling air flow outside the control assembly 100 can flow through the power supply unit 13 along the cooling air duct 143 via the air inlet 141 under the driving of the fan 123, and further enter the wind collecting member 146 via the air inlet channel between the wind collecting member 146 and the third housing 117, so that the cooling air can sufficiently cool the driving motor 121, and finally discharged through the air outlet 147 and the air outlet 142.

The PCB 122 is fixed inside the housing 11, and the installation position of the cooling air duct 143 passes through the fixed position of the PCB 122, in the present invention, the PCB 122 is arranged inside the third housing 117 and fixed in a glue-pouring or threaded manner, specifically, the PCB 122 is arranged around the driving motor 121, so that the PCB 122 is arranged in a C-shaped or L-shaped or circular or linear arrangement structure, further, the PCB 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 driving motor 121, so that when the cooling air enters the wind gathering member 146 through the air inlet channel between the wind gathering member 146 and the third housing 117, the heat of the PCB 122 can be reduced at the same time.

In a preferred embodiment of the present invention, the third housing 117 is a metal housing made of a metal housing material, and at this time, the PCB 122 can also dissipate heat through the third housing 117, and preferably, the third housing 117 is further provided with a plurality of heat dissipation ribs 118, so that the heat dissipation area of the third housing 117 can be effectively increased, and the heat dissipation capability of the control assembly 100 is further improved.

The power supply unit 13 includes a battery chamber 131 disposed in the receiving space 113 and a battery 132 inserted into the battery chamber 131. Specifically, the battery cavity 131 is clamped between the first housing 111 and the second housing 112, the battery cavity 131 has a clamping portion 13 clamped with the first housing 111 and the second housing 112, further, a card holder (not shown) for electrically connecting the driving unit 12 and the battery 132 is disposed at the bottom of the battery cavity 131, a side wall of the battery cavity 131 is disposed toward the air inlet 141, and the cooling air duct 143 extends around the battery cavity 131 and finally communicates with the air collecting member 146 and/or the air outlet 142, so as to dissipate heat of the power supply unit 13.

It should be noted that the control assembly 100 of the present invention further has other units for operating the control assembly 100, such as the switch unit 15, and the specific structure thereof is the same as or similar to that of the switch unit in the prior art, and therefore, the detailed description is omitted herein, and it should be understood that although the description of the known structure and technology is omitted in the description, the description is only for avoiding unnecessarily obscuring the concept of the present invention, and it should not be directly understood that the present invention is not provided with or included in the present invention.

Referring to fig. 6, a power cutting tool 300 according to the present invention is shown. The electric cutting tool 300 includes a working assembly 200 for performing a garden work task and a control assembly for controlling the operation of the working assembly 200, and it should be noted that the control assembly in this embodiment is the aforementioned control assembly 100, so the following description will only describe the working assembly 200 in detail, and repeated parts are not repeated herein.

The working assembly 200 of the present invention is a cutting knife working assembly for performing a cutting task, and includes a cutting knife unit 21, a transmission unit 22 for transmitting and connecting the cutting knife unit 21 and the driving unit 12, and a spraying unit 23 provided corresponding to the cutting knife unit 21.

Referring to fig. 6 and 7, the cutter unit 21 is used for performing a corresponding cutting task by the driving of the driving motor 121, and in the present invention, the cutter unit 21 includes a guard cover 211 rotatably coupled to an end of the driving unit 22 in an extending direction thereof and a cutting blade 211 rotatably received in the guard cover 211. In a preferred embodiment of the present invention, the protective cover 211 is substantially semicircular and can rotate around the cutting blade 212, so as to prevent the operator from accidentally touching the working element 200 in the working state and causing injury to the body when using the electric cutting tool 300; on the other hand, dust or waste liquid generated by the cutting blade 212 in the rotating process can be effectively prevented from splashing, and the practicability of the electric cutting tool 300 is effectively improved.

Referring to fig. 7 to 11, the driving unit 22 is for driving and connecting the driving motor 121 and the cutting blade unit 21, and in the present invention, the driving unit 22 includes a supporting arm 221 detachably connected to the third housing 117, a driving shaft 222 accommodated in the supporting arm 221, and an output shaft 223 for connecting the cutting blade 212.

Specifically, the support arm 221 is hollow, the transmission shaft 222 is rotatably accommodated in the support arm 221 through a bearing 224, and the driving shaft of the driving motor 121 penetrates the third housing 117 and protrudes into the support arm 221 to be drivingly connected to the transmission shaft 222 accommodated in the support arm 221. In the present invention, the end of the driving shaft in the extending direction is connected to the driving shaft 222 through the coupling 224, and in fact, the driving shaft and the driving shaft 222 are easily vibrated during the transmission connection process, so the coupling 225 in this embodiment is a flower-type coupling made of polyurethane material.

In particular, since the ratio of the radius of the transmission shaft 222 to the radius of the cutting blade 212 directly affects the working duration of the working assembly 200 and the smoothness of the cutting efficiency 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 100-200 mm.

Further, the included angle between the driving shaft and the driving shaft 222 and the horizontal plane will also directly affect the gravity balance performance of the electric cutting tool 300, so in a preferred embodiment of the present invention, the included angle between the driving shaft and the driving shaft 222 and the horizontal plane is 15 to 45 °, and preferably, the included angle between the driving shaft and the driving shaft 222 and the horizontal plane is 30 °, so as to improve the operation stability of the operator while achieving the balance of the electric cutting tool 300.

The output rotating shaft 223 is used to connect the driving unit 22 and the cutting blade unit 21, and in the present invention, one end of the output rotating shaft 223 penetrates the protection cover 211 to be connected with the cutting blade 212 received in the protection cover 211, and the center of the cutting blade 212 is provided with a connection hole 213 (as shown in fig. 7) for fixedly connecting the output rotating shaft 223, that is, in the present invention, the output rotating shaft 223 penetrates the protection cover 211 and the connection hole 213 to be connected with the cutting unit 21.

Further, the other end of the output rotating shaft 223 is connected to the other end of the transmission shaft 222 through a bevel gear 226, so that the output rotating shaft 223 and the transmission shaft 222 are arranged at an included angle to facilitate observing the cutting position of the cutting blade 212. Preferably, the output rotating shaft 223 of the present invention is vertically disposed to the driving shaft 222 by a bevel gear 226.

In particular, since the bevel gear 226 is influenced by the interaction force of the cutting object rotated by the cutting blade 212 during the process of driving and connecting the transmission shaft 222 and the cutting knife unit 21, the bevel gear 226 has a force acting on the transmission shaft 222 in the direction toward the driving shaft, so as to prevent the aforementioned force from influencing the driving motor 121, the supporting arm 221 further has a positioning member 227 for positioning the bearing 224 therein, preferably, the positioning member 327 is disposed on the transmission shaft 322 and is a metal member bolt (not numbered) for fixing the connecting position of the bearing 324, and of course, in other embodiments of the present invention, the positioning member 327 can also be other metal members or U-shaped members for implementing clamping, and the invention, i.e., the specific structure and form of the positioning member 227 can be selected according to actual needs, and is not limited herein.

It should be noted that, since the motor power, the rotation speed of the cutting blade 212 and the reduction ratio between the driving unit 12 and the transmission unit 22 directly affect the working time, the working efficiency and the energy consumption of the electric cutting tool 300 in the present invention, the electric cutting tool 300 can achieve high-efficiency cutting; in the invention, the reduction transmission ratio of the bevel gear 226 is 2-6, and preferably, the power of the battery 132, which is the lithium battery pack driving motor 121 with the voltage of 60-82V, is 1000-3500W, so that the cutting speed of the cutting blade 212 reaches 3500-6000 rpm.

The spraying unit 23 is connected to an external water supply unit (not shown) to spray the cutter unit 21 in an operating state, and prevents dust from splashing during cutting while cooling the cutter unit 21. In the present invention, the spray unit 23 includes a spray member 231 attached to the cutter unit 21, a control valve 232 for controlling a spray state of the spray member 231, and an external joint 233 for connecting an external water supply unit, and the spray member 231, the control valve 232, and the external joint 233 are connected by a pipe 234.

Specifically, the spraying member 231 is provided in a "U" shape and is engaged with the edge of the protection cover 211, and further, both ends of the spraying member 231 are provided with nozzles 2311, and the nozzles 2311 are held at both sides of the cutting blade 212 by the spraying member 231 to spray both sides of the cutting blade 212 at the same time. Further, the control valve 232 is connected to the spraying member 231 through a pipe 234, and in a preferred embodiment of the present invention, the control valve 232 is disposed beside the second housing 112, so that the operator can conveniently control the spraying unit 23, and in other embodiments of the present invention, the control valve 232 can be disposed at other positions, which only needs to be ensured.

The external connector 233 is used for connecting an 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 is detachably connected to the pipeline 234, that is, in the present invention, the external connector 233 may be selected according to actual needs and specific structures of the external water supply unit, which is not limited herein.

In summary, the control assembly 100 of the present invention, by providing the cooling structure 14 formed in the housing 11, can ensure that the control assembly 100 has a smaller volume, and at the same time, effectively cool the driving unit 12 and the power supply unit 13 accommodated in the housing 11, so as to further make the electric cutting tool 300 using the control assembly 100 have a compact structure, a smaller occupied space, and convenient operation, effectively improve the working efficiency of the electric cutting tool 300, prolong the service life of the electric cutting tool, and facilitate the popularization and use of the electric cutting tool 300.

Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.

Claims

1. A power cutting tool comprising a working assembly and a control assembly for controlling the working assembly, the control assembly comprising:

the shell at least comprises a first shell, a second shell and an accommodating space, wherein the first shell and the second shell are clamped, and the accommodating space is formed by the first shell and the second shell in a surrounding mode;

the driving unit is accommodated in the accommodating space and is used for driving the working assembly;

the power supply unit comprises a battery cavity arranged in the accommodating space and a battery inserted in the battery cavity;

the method is characterized in that: be formed with in the casing and be used for the cooling drive unit with power supply unit's cooling structure, cooling structure is including setting up air intake on the first casing, setting are in air outlet on the second casing and connection the air intake with the cooling wind channel of air outlet, drive unit is including the outstanding fan that stretches into in the cooling wind channel, the fan drives the outer cooling gas of control assembly via the air intake is followed the cooling wind channel flows through power supply unit with drive unit and by the air outlet is discharged.

2. The power cutting tool of claim 1, wherein: the cooling structure further comprises a wind gathering component which is at least covered on the fan, the wind gathering component is provided with an air outlet facing the air outlet, cooling gas passes through the air inlet and flows through the cooling air channel, the power supply unit and the driving unit enter the wind gathering component and finally pass through the air outlet and the air outlet.

3. The power cutting tool of claim 1, wherein: the drive unit is including connecting the driving motor of casing front end and being used for control driving motor's electronic control unit, driving motor's one end can be dismantled the connection and be in on the casing and with the work component drive is connected, and the other end is connected with the fan.

4. The power cutting tool of claim 3, wherein: the shell comprises a third shell for fixing the driving unit, the driving motor penetrates through the third shell, and the electronic control unit is arranged on the inner side of the third shell and accommodated in the accommodating space.

5. The power cutting tool of claim 4, wherein: the third shell is buckled at the front ends of the first shell and the second shell and is made of metal materials, and at least one heat dissipation rib is arranged on the inner side of the third shell.

6. The power cutting tool of claim 3, wherein: the electronic control unit is arranged around the driving motor and provided with at least one MOS (metal oxide semiconductor) tube, and the at least one MOS tube is arranged close to the driving motor so as to accelerate heat dissipation under the use of the fan.

7. The power cutting tool of claim 1, wherein: the air inlet is arranged on the side wall of the first shell and formed by inward depression of the first shell, an air inlet baffle is further arranged on the outer side of the air inlet, and a filtering component is arranged between the air inlet baffle and the air inlet.

8. The power cutting tool of claim 1, wherein: the control assembly further comprises a first handle assembly formed on the first housing and/or the second housing, a second handle assembly disposed about the first housing, and a base removably attached to a lower portion of the housing.

9. The power cutting tool of claim 1, wherein: the working assembly comprises a cutting knife unit, a transmission unit in transmission connection with the cutting knife unit and the driving unit, and a spraying unit used for spraying the cutting knife unit.

10. The power cutting tool of claim 9, wherein: the spraying unit is connected with an external water supply unit, the spraying unit comprises a spraying component attached to the cutting knife unit, a control valve used for controlling the spraying state of the spraying component and an external connector used for connecting the external water supply unit, and the spraying component, the control valve and the external connector are connected through pipelines.