Electric tool

Abstract

The invention discloses an electric tool which comprises a shell, a motor, a main shaft and a machining element. The shell is provided with a mounting cavity. And the motor is arranged in the mounting cavity. One end of the spindle is connected to the output end of the motor, and the other end extends out of the shell. The machining element is connected to the end, away from the motor, of the spindle and driven by the spindle to synchronously run. The protective cover is connected to the shell and covers at least part of the machining elements, the cooling mechanism is connected to the shell or the protective cover, and the cooling mechanism comprises a first pressurizing assembly and a second pressurizing assembly. The first pressurizing assembly is used for communicating with a cooling liquid source and applying pressure to cooling liquid. The second pressurizing assembly comprises a rotating wheel and a nozzle, the rotating wheel is connected to the spindle and driven by the spindle to synchronously rotate, the rotating wheel is arranged adjacent to the machining element, and the second pressurizing assembly communicates with the first pressurizing assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of electric tools, and in particular to an electric tool with a cooling mechanism. Background Art

[0002] Electric tools, especially cutting and slotting electric tools, often use motors to drive transmission mechanisms to enable saw blades, cutting blades and other processing components connected to the transmission mechanisms to process workpieces. However, when the processing components are running at high speed, the friction between them and the workpiece will cause their own temperature to rise rapidly. Continuous high temperature will affect their durability, so cooling treatment is required.

[0003] At present, the cooling technology for processing elements is basically to connect an external water supply system to the power tool, and then introduce cooling water through a water pipe and spray it on the surface of the cutting blade. However, this technology has such a problem that when the water pressure of the matching water supply system is insufficient, the cooling water cannot be fully sprayed on the high-speed running processing element, resulting in dry grinding of the processing element and the workpiece, aggravating the failure of the processing element. What's worse is that the dry grinding of the processing element will generate a lot of dust, which will seriously affect the user's physical and mental health once inhaled by the user. In view of this, it is determined to be necessary to provide an improved power tool to overcome the defects of the prior art. Summary of the invention

[0004] The main purpose of the present invention is to provide an electric tool, aiming to provide an electric tool with a cooling mechanism to efficiently cool down a processing element.

[0005] To achieve the above object, the present invention provides an electric tool, comprising:

[0006] A housing having a mounting cavity;

[0007] A motor, arranged in the installation cavity;

[0008] A main shaft, one end of which is connected to the output end of the motor, and the other end of which extends to the outside of the housing; a processing element, which is connected to the end of the main shaft away from the motor, and the processing element is driven by the main shaft to operate;

[0009] A protective cover connected to the housing and covering at least a portion of the processing element, wherein the electric tool further comprises a cooling mechanism connected to the housing or the protective cover, and the cooling mechanism comprises:

[0010] A first pressurizing component, the first pressurizing component is connected to the housing or the protective cover, the first pressurizing component is connected to a coolant source and applies pressure to the coolant;

[0011] A second pressurizing assembly, the second pressurizing assembly is connected to the housing or the protective cover, the second pressurizing assembly comprises a rotating wheel and a nozzle, the rotating wheel is arranged adjacent to the processing element, and the nozzle is connected to the first pressurizing assembly;

[0012] The nozzle is used to spray the coolant toward the rotating wheel, the rotating wheel has a groove for storing the coolant, and the coolant is centrifugally thrown to the processing element under the high-speed rotation of the rotating wheel.

[0013] Optionally, the first pressurizing component includes:

[0014] A pressurizing seat, the pressurizing seat is connected to the shell, the pressurizing seat is provided with a pressurizing chamber and a water inlet and a water outlet connected to the pressurizing chamber, the water inlet is used to connect to the coolant source, and the water outlet is connected to the second pressurizing component;

[0015] a piston movably disposed in the pressurizing chamber; and

[0016] A driving member is connected to the piston and is used to drive the piston to reciprocate in the pressurizing chamber.

[0017] Optionally, the driving member comprises:

[0018] a rotating shaft, the rotating shaft being rotatably connected to the housing or the protective cover; and

[0019] An eccentric wheel assembly is sleeved on the rotating shaft, an output end of the eccentric wheel assembly is connected to the piston, and the rotating shaft and the eccentric wheel assembly move in coordination so that the piston performs reciprocating motion.

[0020] Optionally, one end of the spindle adjacent to the processing element is the rotating shaft, the rotating wheel sleeve is arranged on the rotating shaft, the spindle is passed through the shell, and the motor drives the spindle to move, so that the processing element and the piston are driven to move at the same time under the drive of the spindle.

[0021] Optionally, the groove comprises a plurality of straight grooves extending along the axial direction of the rotating wheel, and the plurality of straight grooves are arranged on the circumferential surface of the rotating wheel at intervals around the rotation axis of the rotating wheel.

[0022] Optionally, the groove further includes a plurality of annular grooves, which are arranged on the circumferential surface of the rotating wheel at intervals around the rotation axis of the rotating wheel, and the rotation axis of the rotating wheel passes through the center of each of the annular grooves.

[0023] Optionally, the groove depth of the annular groove is not greater than the groove depth of the straight groove, and the groove width of the annular groove is smaller than the groove width of the straight groove.

[0024] Optionally, the electric tool is provided with two processing elements, the two processing elements are connected to two sides of the rotating wheel and are coaxially arranged with the rotating wheel, and at least part of the groove is located between the two processing elements.

[0025] Optionally, the electric tool is provided with two processing elements, the number of the nozzles is at least three, at least one nozzle is provided on both sides of each processing element, and at least one nozzle is provided between two processing elements.

[0026] Optionally, the nozzle is mounted on the protective cover, and the processing element is a saw blade.

[0027] Compared with the prior art, the present invention has the following beneficial effects: the electrician tool is provided with a cooling mechanism, the cooling mechanism includes a first pressurizing component and a second pressurizing component, and the coolant undergoes the pressurizing action of the first pressurizing component and the second pressurizing component in succession during transportation, and can obtain sufficient power, so that the coolant can be fully sprayed onto the processing element, thereby improving the cooling effect of the processing element and reducing the probability of failure of the processing element due to dry grinding with the workpiece.

[0028] Specifically, the first pressurizing component is provided with an eccentric wheel mechanism at the main shaft, and the eccentric wheel mechanism is driven by the main shaft to operate, thereby indirectly driving the piston to reciprocate in the pressurizing seat. This process can pressurize the coolant for the first time. The first pressurizing component can achieve the pressurization of the coolant through a simple structure. Moreover, the first pressurizing component is easy to disassemble and assemble relative to the electric tool, which is convenient for users to use.

[0029] The coolant pressurized by the first pressurizing component is then sprayed toward the high-speed rotating saw blade through the nozzles arranged on the outside of the two saw blades, thereby cooling the outer end surfaces of the saw blades; in addition, the second pressurizing component sets a rotating wheel and a nozzle between the two saw blades. Since the rotating wheel has multiple grooves arranged at intervals along the axial and circumferential directions, the grooves can store the received coolant. When the rotating wheel rotates at a high speed, the coolant in the grooves can be centrifugally thrown to the inner end surface of the saw blade to cool the inner end surface of the saw blade. This process is the second pressurizing process, which further improves the cooling rate and cooling uniformity of the saw blade.

[0030] In addition, by installing the nozzles on the outside of the two saw blades and between the two saw blades, the dust generated during the power tool processing is greatly reduced, which is beneficial to the physical and mental health of the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0032] Figure 1 It is a schematic diagram of the structure of the electric tool of the present invention;

[0033] Figure 2 It is a schematic diagram of the internal structure of the electric tool of the present invention;

[0034] Figure 3 It is a schematic structural diagram of the cooling mechanism of the electric tool of the present invention;

[0035] Figure 4 An exploded schematic diagram of the cooling mechanism of the electric tool of the present invention;

[0036] Figure 5 It is a schematic structural diagram of the rotating wheel of the electric tool of the present invention;

[0037] Figure 6 Schematic diagram of water flow of the rotating wheel of the electric tool of the present invention.

[0038] Description of Figure Numbers:

[0039] Housing-1; motor-11; spindle-12; processing element-13; protective cover-14; first pressurizing component-2; pipeline-21; pressurizing seat-22; water inlet-221; water outlet-222; piston-23; driving member-24; eccentric wheel component-25; eccentric wheel boss-251; eccentric wheel sleeve rod-252; second pressurizing component-3; nozzle-31; rotating wheel-32; straight groove-321; annular groove-322; switch-4

[0040] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0043] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0044] See also Figure 1 , Figure 2 and Figure 3 In one embodiment of the present application, there is provided an electric tool including a housing 1, a motor 11, a spindle 12 and a processing element 13. The housing 1 is provided with an installation cavity. The motor 11 is arranged in the installation cavity. One end of the spindle 12 is connected to the output end of the motor 11, and the other end extends to the outside of the housing 1. The processing element 13 is connected to an end of the spindle 12 away from the motor 11, and the processing element 13 operates synchronously driven by the spindle 12. A protective cover 14 is connected to the housing 1 and covers at least part of the processing element 13. The electric tool also includes a cooling mechanism, which is connected to the housing 1 or the protective cover 14. The cooling mechanism includes a first pressurizing component 2 and a second pressurizing component 3. The first pressurizing component 2 is connected to the housing 1 or the protective cover 14, and is used to connect to a coolant source and apply pressure to the coolant. The second pressurizing component 3 is connected to the housing 1 or the protective cover 14, and includes a rotating wheel 32 and a spray head 31. The rotating wheel 32 is connected to the main shaft 12 and rotates synchronously with the main shaft 12. The rotating wheel 32 is arranged adjacent to the processing element 13, and the second pressurizing component 3 is connected to the first pressurizing component 2. The spray head 31 is used to spray the coolant toward the rotating wheel 32, and the coolant is centrifugally thrown to the processing element 13 under the high-speed rotation of the rotating wheel 32.

[0045] Specifically, the electric tool is a tool for water and electricity grooving, such as a grooving machine. The shell 1 is provided with a handle and an installation cavity, the main body of the motor 11 is in the installation cavity, and the output end of the motor 11 is connected to the saw blade of the electric saw, so that the saw blade extends outside the installation cavity. It can be understood that the electric tool also has related electrical components such as batteries or cables, controllers, etc., which are all arranged in the installation cavity and electrically connected to the motor 11. The shell 1 is also connected to a protective cover 14, or the shell 1 and the protective cover 14 are integrated. The protective cover 14 wraps around a partial area of ​​the processing element 13, which is adjacent to the handle, to prevent the processing element 13 from cutting the user's arm or to prevent the processing element 13 from hitting some small stones or small wood blocks and causing them to be ejected to the user's arm, thereby avoiding injury to the user.

[0046] Furthermore, the cooling mechanism also includes a plurality of pipes 21, one end of a pipe 21 is connected to a coolant source, which may be a water source, and the other end is connected to the first pressurizing component 2. A water pump is provided at the water source to transport the cooling water to the first pressurizing component 2. It is understandable that when the cooling water flows from the water pump to the remote electric tool, the water pressure decreases, and the first pressurizing component 2 pressurizes the water in the pipe 21. The pipe 21 is connected between the nozzles 31 of the first pressurizing component 2 and the second pressurizing component 3. The cooling water is transported from the pipe 21 to the nozzle 31, and is sprayed from the nozzle 31 to the surface of the rotating wheel 32. It is understandable that water has the characteristic of adhering to the surface of an object. When the cooling water is sprayed to the rotating wheel 32, a part of it is hit by the rotating wheel 32 onto the processing element 13, and the impact causes the cooling water to be accelerated, that is, secondary pressurization. The accelerated cooling water is more likely to adhere to the processing element 13 running at a high speed. The other part is attached to the surface of the rotating wheel 32 and moves with the rotation of the rotating wheel 32. However, under the high-speed rotation, the attached cooling water is thrown toward the saw blade by the centrifugal force, which also accelerates the cooling water, which is also a secondary pressurization. Similarly, the thrown-off cooling water is also more likely to adhere to the high-speed rotating processing element 13.

[0047] Furthermore, the output end of the motor 11 is connected to the processing element 13 via the main shaft 12 , and the output end can also be connected to the main shaft 12 via a connection structure such as a coupling or a helical gear assembly to change the position and rotation direction of the main shaft 12 .

[0048] Through this embodiment, a power tool with a cooling mechanism capable of multiple pressurization is provided. During transportation, the coolant is first pressurized by the first pressurizing component 2, and then pressurized by the second pressurizing component 3. The second component sprays the coolant to the rotating wheel 32 through the nozzle 31. The coolant is hit or shaken by the rotating wheel 32 to increase the acceleration of the coolant, so that the coolant is sprayed more forcefully onto the high-speed processing element 13. Through this solution, the coolant will not be transported over a long distance due to insufficient water pressure, resulting in only a small amount of coolant being sprayed onto the processing element 13, thereby improving the cooling capacity of the power tool.

[0049] See also Figure 3 and Figure 4 The present invention provides an embodiment, wherein the first pressurizing assembly 2 comprises a pressurizing seat 22, a piston 23 and a driving member 24. The pressurizing seat 22 is connected to the housing 1, and the pressurizing seat 22 is provided with a pressurizing chamber and a water inlet 221 and a water outlet 222 connected to the pressurizing chamber, wherein the water inlet 221 is used to connect to the cooling liquid source, and the water outlet 222 is connected to the second pressurizing assembly 3. The piston 23 is movably arranged in the pressurizing chamber. The driving member 24 is connected to the piston 23, and is used to drive the piston 23 to reciprocate in the pressurizing chamber.

[0050] Specifically, the pressurizing seat 22 is a tubular structure, connected to the housing 1, and the inside of the tube is a pressurizing chamber. The tube wall is provided with a water inlet 221, which is connected to the pipe 21 and then connected to the cooling liquid source. One end of the tube is provided with a water outlet 222, which is connected to the pipe 21 and connected to the nozzle 31. The other end of the pipe 21 is connected to the movable piston 23, and the driving member 24 drives the piston 23 to reciprocate in the pressurizing chamber.

[0051] It can be understood that the piston 23 is initially at the end away from the water outlet 222, the pressurizing chamber is filled with cooling water, and the driving member 24 drives the piston 23 to approach the water outlet 222, so that the cooling water in the pressurizing chamber is compressed, and the pressure of the cooling water is increased when it leaves the water outlet 222. Then the driving member 24 drives the piston 23 away from the water outlet 222, so that the cooling water at the water inlet 221 is replenished into the pressurizing chamber.

[0052] According to this embodiment, the piston 23 continuously reciprocates to pressurize the cooling water in the pipe 21 , and the pressurized cooling water enters and is sprayed out by the spray head 31 .

[0053] See also Figure 3 and Figure 4 The present invention provides an embodiment, wherein the driving member 24 includes a rotating shaft and an eccentric wheel assembly 25. The rotating shaft is rotatably connected to the housing 1 or the protective cover 14. The eccentric wheel assembly 25 is sleeved on the rotating shaft, and the output end of the eccentric wheel assembly 25 is connected to the piston 23. The rotating shaft and the eccentric wheel assembly 25 cooperate to move so that the piston 23 reciprocates.

[0054] Specifically, the rotating shaft is passed through the housing 1, and one end is connected to the output end of the motor 11. One motor 11 can drive the saw blade and the rotating shaft at the same time, or two motors 11 can drive the saw blade and the rotating shaft respectively. The eccentric wheel assembly 25 includes an eccentric wheel boss 251 and an eccentric wheel sleeve rod 252. The eccentric wheel boss 251 is connected to the rotating shaft, and the eccentric wheel sleeve rod 252 is sleeved on the eccentric wheel boss 251. The eccentric wheel sleeve rod 252 is also movably connected to the piston 23. The rotating shaft drives the eccentric wheel boss 251 to rotate, and the eccentric wheel sleeve rod 252 converts the rotational motion of the eccentric wheel boss 251 into linear motion, driving the piston 23 to reciprocate in the pressurized chamber.

[0055] According to this embodiment, the piston 23 is driven to reciprocate by the rotating shaft and the eccentric wheel assembly 25. Since most electric tools are driven by the motor 11, it is more convenient to convert the rotational motion into the linear motion.

[0056] See also Figure 2 , Figure 3 and Figure 4 The present invention provides an embodiment, wherein the end of the spindle 12 away from the processing element 13 is the rotating shaft and is disposed through the housing 1, and the motor 11 drives the spindle 12 to move. Thus, the spindle 12 drives the processing element 13 and the piston 23 to move at the same time.

[0057] Specifically, the rotating shaft is a part of the main shaft 12 adjacent to the processing element 13. One end of the main shaft 12 is connected to the center of the saw blade, and the other end extends to the other side through the protective cover 14. The part of the main shaft 12 extending to the other side is the rotating shaft, and the eccentric wheel boss 251 is sleeved on the rotating shaft.

[0058] According to this embodiment, when the power tool is turned on, the spindle 12 rotates, driving the first pressurizing assembly 2 to pressurize the cooling water in the pressurizing chamber. When the power tool is turned off, the spindle 12 stops rotating, and the first pressurizing assembly 2 also stops rotating. This makes it possible to operate the cooling mechanism without additional control, and the power tool can be operated or stopped at the same time, thereby improving the cooling efficiency and saving the user's time.

[0059] See also Figure 5 and Figure 6 The present invention provides an embodiment, wherein a groove for accommodating the coolant is provided on the circumferential surface of the rotating wheel 32, wherein the nozzle 31 sprays the coolant toward the groove, and the coolant is centrifugally thrown to the processing element 13 under the high-speed rotation of the rotating wheel 32.

[0060] Specifically, the rotating wheel 32 is a cylindrical structure, with multiple grooves cut on the circumferential surface, and the nozzle 31 is arranged toward the groove. The groove has a certain storage capacity and can accommodate a certain amount of cooling water. It can be understood that when the amount of cooling water in the groove is more, the rotating wheel 32 cannot throw away all the cooling water at once, so that the groove is thrown away only when it carries part of the cooling water away from the nozzle 31. In addition, the groove wall is a plane, and its angle with the circumferential surface can determine the direction in which the cooling water is thrown out.

[0061] Through this embodiment, the groove stores part of the cooling water, and the rotating wheel 32 continuously throws out a small amount of cooling water in the groove during the rotation process, so that the cooling water falls more evenly on all surfaces of the saw blade, thereby improving the cooling effect.

[0062] refer to Figure 5 The present invention provides an embodiment, wherein the groove includes a plurality of straight grooves 321, and the straight grooves 321 extend along the axial direction of the rotating wheel 32. The plurality of straight grooves 321 surround the rotation axis of the rotating wheel 32 and are spaced apart on the circumferential surface of the rotating wheel 32.

[0063] Specifically, there are four or more straight grooves 321 evenly distributed on the circumferential surface of the rotating wheel 32 , and the groove shape of each straight groove 321 is consistent.

[0064] Through this embodiment, the four straight grooves 321 are evenly distributed around the rotating wheel 32. As the rotating wheel 32 rotates, the four straight grooves 321 successively accommodate the cooling water sprayed from the nozzle 31, and also throw the cooling water around, so that the cooling water is distributed more evenly and the cooling effect is better.

[0065] See also Figure 5 The present invention provides an embodiment, wherein the groove further comprises a plurality of annular grooves 322, which are arranged at intervals on the circumferential surface of the rotating wheel around the rotation axis of the rotating wheel 32, and the rotation axis of the rotating wheel 32 passes through the center of each annular groove 322. The groove depth of the annular groove 322 is not greater than the groove depth of the straight groove 321, and the groove width of the annular groove 322 is less than the groove width of the straight groove 321.

[0066] Specifically, there are seven or more annular grooves 322, and the annular grooves 322 are arranged around the circumferential surface, so that one annular groove 322 is connected to multiple straight grooves 321. When the groove depth of the annular groove 322 is smaller than the groove depth of the straight groove 321 and the groove width of the annular groove 322 is smaller than the groove width of the straight groove 321, the cooling water in the annular groove 322 can be partially drained into the straight groove 321 as the rotating wheel moves. This is because the effect of the straight groove 321 in rejecting cooling water is better than that of the annular groove 322.

[0067] Through this embodiment, the annular groove 322 can not only impact the cooling water to accelerate the cooling water, but also accommodate part of the cooling water so that the cooling water is thrown out more evenly. At the same time, the annular groove 322 can also allow part of the contained cooling water to be added to the straight groove 321, and the effect of throwing it out through the straight groove 321 is better.

[0068] See also Figure 2 and Figure 5 The present invention provides an embodiment, wherein the electric tool is provided with two processing elements 13 , the two processing elements 13 are connected to both sides of the rotating wheel 32 and are coaxially arranged with the rotating wheel 32 , and at least part of the groove is located between the two processing elements 13 .

[0069] Specifically, the electric tool includes two saw blades and a rotating wheel 32 , and the main shaft 12 passes through the two saw blades and the rotating wheel 32 at the same time. The main shaft 12 is connected to the center of the saw blades and passes through the axis of the rotating wheel 32 .

[0070] Through this embodiment, the main shaft 12 drives the rotating wheel 32 and the saw blade to rotate at the same time, saving the additional power required to rotate the rotating wheel 32. At the same time, the saw blades are on both sides of the rotating wheel 32, so that one rotating wheel 32 can cool two saw blades, making full use of cooling water and improving cooling efficiency.

[0071] See also Figure 2 and Figure 5 The present invention provides an embodiment, wherein the number of the nozzles 31 is at least three, at least one nozzle 31 is disposed on both sides of each processing element 13, and at least one nozzle 31 is disposed between two processing elements 13.

[0072] Specifically, the water outlet 222 of the pressurizing seat 22 is connected to the pipe 21, the other end of the pipe 21 is connected to one of the four-way ports, and the other three ports are respectively connected to a nozzle 31. The three nozzles 31 are connected to the protective cover 14, the first nozzle 31 sprays cooling water toward the outside of the first saw blade to cool the outside of the first saw blade, the second nozzle sprays cooling water toward the rotating wheel 32 to cool the insides of the two saw blades, and the third nozzle 31 sprays toward the outside of the second saw blade to cool the outside of the second saw blade.

[0073] Furthermore, a switch 4 is provided on the pipe 21 entering the cooling mechanism, which can control whether the coolant flows through the cooling mechanism.

[0074] Through this embodiment, the multiple nozzles 31 cool down the two saw blades, so that the cooling effect of the saw blades is better. In addition, the sprayed coolant can also wet some dust and debris in the environment and make them fall to the ground, thereby reducing impurities in the air.

[0075] See also Figure 2 The present invention provides an embodiment, wherein the processing element 13 is a saw blade.

[0076] Through this embodiment, the saw blade will generate high temperature and may also generate dust during operation. By spraying cooling liquid, the saw blade can be cooled and dust or debris in the air can be removed.

[0077] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An electric tool comprising: A housing having a mounting cavity; A motor, arranged in the installation cavity; A main shaft, one end of which is connected to the output end of the motor and the other end of which extends to the outside of the housing; A processing element is connected to an end of the spindle away from the motor, and the processing element is driven by the spindle to operate; A protective cover connected to the housing and covering at least a portion of the processing element, wherein the electric tool further comprises a cooling mechanism connected to the housing or the protective cover, and the cooling mechanism comprises: A first pressurizing component, the first pressurizing component is connected to the housing or the protective cover, the first pressurizing component is connected to a coolant source and applies pressure to the coolant; A second pressurizing assembly, the second pressurizing assembly is connected to the housing or the protective cover, the second pressurizing assembly comprises a rotating wheel and a nozzle, the rotating wheel is arranged adjacent to the processing element, and the nozzle is connected to the first pressurizing assembly; The nozzle is used to spray the coolant toward the rotating wheel, the rotating wheel has a groove for storing the coolant, and the coolant is centrifugally thrown to the processing element under the high-speed rotation of the rotating wheel.

2. The electric tool according to claim 1, characterized in that: The first pressurizing component comprises: A pressurizing seat, the pressurizing seat is connected to the shell, the pressurizing seat is provided with a pressurizing chamber and a water inlet and a water outlet connected to the pressurizing chamber, the water inlet is used to connect to the coolant source, and the water outlet is connected to the second pressurizing component; a piston movably disposed in the pressurizing chamber; and A driving member is connected to the piston and is used to drive the piston to perform reciprocating motion in the pressurizing chamber.

3. The electric tool according to claim 2, characterized in that: The driving member comprises: a rotating shaft, the rotating shaft being rotatably connected to the housing or the protective cover; and An eccentric wheel assembly is sleeved on the rotating shaft, an output end of the eccentric wheel assembly is connected to the piston, and the rotating shaft and the eccentric wheel assembly move in coordination so that the piston performs reciprocating motion.

4. The electric tool according to claim 3, characterized in that: One end of the spindle adjacent to the processing element is the rotating shaft, the rotating wheel sleeve is arranged on the rotating shaft, the spindle is passed through the shell, and the motor drives the spindle to move, so that the processing element and the piston are driven to move at the same time under the drive of the spindle.

5. The electric tool according to claim 1, characterized in that: The grooves include a plurality of straight grooves extending along the axial direction of the rotating wheel. The plurality of straight grooves are arranged at intervals on the circumferential surface of the rotating wheel around the rotation axis of the rotating wheel.

6. The electric tool according to claim 5, characterized in that: The grooves further include a plurality of annular grooves, which are arranged at intervals on the circumferential surface of the rotating wheel around the rotation axis of the rotating wheel, and the rotation axis of the rotating wheel passes through the center of each of the annular grooves.

7. The electric tool according to claim 6, characterized in that: The groove depth of the annular groove is not greater than the groove depth of the straight groove, and the groove width of the annular groove is smaller than the groove width of the straight groove.

8. The electric tool according to claim 1, characterized in that: The electric tool is provided with two processing elements, which are connected to two sides of the rotating wheel and are coaxially arranged with the rotating wheel, and at least part of the groove is located between the two processing elements.

9. The electric tool according to claim 1, characterized in that: The electric tool is provided with two processing elements, the number of the nozzles is at least three, at least one nozzle is provided on both sides of each processing element, and at least one nozzle is provided between two processing elements.

10. The electric tool according to claim 1, characterized in that: The nozzle is installed on the protective cover, and the processing element is a saw blade.

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