Power tool

Abstract

The present application relates to a kind of electric tools, including shell, motor assembly installed in the shell, transmission assembly connected to the motor assembly, output portion driven by the transmission assembly and control the control circuit board of the motor assembly;The shell includes the main body portion extending along left and right direction, motor mounting portion connected to the upper side of the main body portion and the holding portion connected to the lower side of the main body portion, the motor assembly is housed in the motor mounting portion, the motor shaft of the motor assembly extends to the main body portion and is connected to the transmission assembly, the transmission assembly is housed in the main body portion, the control circuit board is arranged in the end side of the transmission assembly relative to the motor shaft obliquely.This application can make full use of the internal space of electric tool by reasonably setting the placement position of motor assembly, transmission assembly and control circuit board, layout is more reasonable, meet the diversified needs of users.

Description

[Technical Field]

[0001] This invention relates to the field of power tool technology, and in particular to a power tool used for decoration, construction, cleaning, etc. [Background Technology]

[0002] Power tools are instruments that operate through a motor assembly and drive the output unit via a transmission assembly to perform tasks. They are popular among users because they are easy to carry and have high work efficiency.

[0003] Existing handheld power tools typically include a main body housing the motor assembly and a grip connected to the main body. A transmission assembly is also housed within the main body, with the motor assembly and transmission assembly extending in the same direction. Handheld power tools also include a control circuit board that controls the motor assembly. This control circuit board is often located at the end of the motor shaft of the motor assembly, or placed parallel to the side of the motor assembly relative to the motor shaft. In addition, there is a type of battery-powered DC power tool, which has a foot at the end of the grip for attaching and detaching the battery pack. In this type of DC power tool, the control circuit board is also often placed at the foot. However, the layout of the motor assembly, transmission assembly, and control circuit board in the above-mentioned power tools has its own limitations and cannot meet the layout requirements of all power tools. Furthermore, the motor assembly, transmission assembly, and control circuit board generate a large amount of heat during operation; if ineffective heat dissipation is not achieved, the lifespan of the power tool will be reduced.

[0004] Therefore, it is determined that it is necessary to provide an improved power tool to overcome the shortcomings of the prior art. [Summary of the Invention]

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a power tool with a reasonable layout that meets the diverse needs of users.

[0006] The present invention solves the problems of the prior art by adopting the following technical solution: an electric tool, including a housing, a motor assembly mounted on the housing, a transmission assembly connected to the motor assembly, an output part driven by the transmission assembly, and a control circuit board for controlling the motor assembly; the housing includes a main body and a gripping part connected to the lower side of the main body, the transmission assembly is housed in the main body, and the control circuit board is arranged obliquely on the end side of the transmission assembly relative to the motor shaft of the motor assembly.

[0007] A further improvement is as follows: the main body extends in the left-right direction, the housing includes a motor mounting part connected to the upper side of the main body, the motor assembly is housed in the motor mounting part, and the motor shaft of the motor assembly extends to the main body and is connected to the transmission assembly.

[0008] A further improvement is as follows: the power tool includes a display unit disposed at the end of the housing, and the control circuit board is located between the transmission assembly and the display unit.

[0009] A further improvement is that the display unit is arranged at an angle relative to the motor shaft, and the control circuit board is located between the motor shaft and the display unit.

[0010] A further improvement is that the right end of the main body protrudes further to the right than the right end of the motor mounting part, and the display part extends from the right end face of the main body and the right end face of the motor mounting part.

[0011] A further improvement is that the control circuit board is housed in the main body and extends at least partially to the motor mounting portion.

[0012] A further improvement is as follows: the control circuit board includes a controller assembly electrically connected to the motor assembly, and the display unit is electrically connected to the controller assembly.

[0013] A further improvement is as follows: the control circuit board includes a heat sink for cooling the controller assembly, the heat sink having a cavity for housing the controller assembly, and the opening of the cavity being away from the motor assembly and the transmission assembly.

[0014] A further improvement is as follows: the motor assembly includes a fan mounted on the motor shaft, the housing has an air inlet and an air outlet, the fan rotates to form a cooling airflow, the cooling airflow enters from the air inlet, flows through the transmission assembly and the motor assembly in sequence, and flows out from the air outlet.

[0015] A further improvement is as follows: the air inlet is located on the lower side of the main body, and the air outlet is located on the upper side of the motor mounting part.

[0016] A further improvement is that the cooling airflow passes through the control circuit board.

[0017] A further improvement is as follows: the power tool includes a cover installed on the housing, the cover being fitted onto the motor mounting portion and the cover shielding the air outlet.

[0018] A further improvement is as follows: the power tool includes a pump unit driven by the transmission assembly, the pump unit is housed in the main body, and the cooling airflow flows through the pump unit.

[0019] A further improvement is as follows: the pump unit includes a pump body, a water inlet located on the lower side of the pump body and a water outlet located on the left side of the pump body, the main body has a recessed portion that at least partially accommodates the water inlet, and the air inlet is opened in the recessed portion.

[0020] Compared with the prior art, the present invention has the following beneficial effects: by rationally setting the placement of the motor assembly, transmission assembly, and control circuit board, the internal space of the power tool can be fully utilized, resulting in a more reasonable layout and meeting the diverse needs of users; by setting air inlets and outlets in the housing, and by using the rotation of the fan in the motor assembly to form a cooling airflow that enters from the air inlet and flows out from the air outlet, the motor assembly, transmission assembly, and control circuit board can be effectively cooled; in addition, the right end of the main body and the right end of the motor mounting part are arranged at an angle relative to the left and right direction, and the display part extends on the right end face of the main body and the right end face of the motor mounting part to facilitate user observation of the display part. [Image Description]

[0021] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings:

[0022] Figure 1 This is a perspective view of a power tool according to a preferred embodiment of the present invention;

[0023] Figure 2 yes Figure 1 Exploded view of the power tool shown

[0024] Figure 3 yes Figure 1 A sectional view of the power tool shown.

[0025] Figure 4 yes Figure 1 The diagram shows the structural design of the housing in the power tool.

[0026] Figure 5 yes Figure 1 A schematic diagram of the first contour surface in the power tool shown;

[0027] Figure 6 yes Figure 1 The diagram shows the fit between the faceplate and the first contour surface of the power tool.

[0028] Figure 7 yes Figure 3 A magnified view of circle A in the middle.

[0029] Meaning of the reference numerals in the diagram:

[0030] Power tools / pressure washer 100 Housing 1

[0031] Main body 11 Air inlet 111 Recessed part 112 Motor mounting part 12 Flange 121 Flange support surface 121a Positioning seat 122 First positioning surface 122a Second positioning surface 122b Flat positioning surface 122c Inclined positioning surface 122d Slit 122e Positioning groove 122f Air outlet 123 Clamping seat 124 Clamping protrusion 124a First mating surface 124b First adhesive surface 124c First window 124d Clamping cavity 124e Grip part 13 Foot 14 Motor assembly 21 Motor housing 211 Stator 212 Motor shaft 213 Rotor 214 Fan 215 Transmission assembly 22 Housing 221 Reduction mechanism 222 Pump unit 3

[0032] Pump body 31; Pressure chamber 311; Plunger 32; Boosting mechanism 33; Inlet end 34; Outlet end 35; Inlet valve 36; Linkage mechanism 37; First arm 371; Second arm 372; Pivot 373; First check valve 38; Second check valve 39; Triggering system 4

[0033] Trigger 41, Trigger lever 41a, Linkage lever 41b, Pivot part 411, Trigger lever 412, Switch 42

[0034] Switch body 421 Trigger button 422

[0035] 423 spring clips, 43 self-locking parts

[0036] Control system 5 Control circuit board 51

[0037] Controller component 511 Heat sink 512

[0038] Cavity 513 Display Unit 52

[0039] Operation button 521 First indicator area 522

[0040] Second indicator area 523 Battery pack 6

[0041] Battery pack button 61 Power switch 62

[0042] Power indicator light 63, cover 7

[0043] Straight section 71, gap 711

[0044] Inclined section 72, concave area 73

[0045] Base plate 731 Second mating surface 731a

[0046] Second adhesive surface 731b, second window 732

[0047] First card end face 74; Second card end face 75

[0048] Straight locking surface 751 Inclined locking surface 752

[0049] 76 locking element; 761 locking rib

[0050] Buckle 762, Anti-collision Rib 763

[0051] First contour surface 78 faceplate 8

[0052] Second contour surface 81 Output section 9 [Detailed Implementation]

[0053] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. For example, terms such as "upper," "lower," "front," and "rear" that indicate orientation or positional relationship are based solely on the orientation or positional relationship shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device / component referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0054] Please see Figures 1 to 3 As shown, the embodiments of the present invention relate to a power tool 100, preferably a high-pressure washer 100. The high-pressure washer 100 is suitable for pressurizing external water flow and spraying it outward to clean vehicles, yards, floors, etc. The high-pressure washer 100 includes a housing 1, a drive system 2 installed in the housing 1, a pump unit 3 driven by the drive system 2, an output part 9 connected to the pump unit 3, and a battery pack 6 that supplies power to the drive system 2. Furthermore, the user can start the high-pressure washer 100 through a trigger system 4 and a control system 5.

[0055] In this embodiment, the housing 1 includes a main body 11 extending in a left-right direction, a motor mounting portion 12 extending upward from the upper end of the main body 11, a grip portion 13 extending downward from the lower end of the main body 11, and a foot 14 connected to the lower end of the grip portion 13. The motor mounting portion 12 has a flange 121 connected to the upper end of the main body 11, a positioning seat 122 connected to the upper side of the flange 121, and a flange support surface 121a provided at the connection between the flange 121 and the positioning seat 122; the grip portion 13 is elongated and cylindrical to facilitate gripping by the user, and the grip portion 13 is arranged at an angle relative to the main body 11; a battery pack 6 that provides power to the high-pressure washer 100 is mounted on the foot 14.

[0056] In this embodiment, the battery pack 6 is installed and released relative to the foot 14 via the battery pack button 61. Pressing the power switch 62 illuminates the power indicator light 63, which displays the power level within the battery pack 6. Optionally, the nominal voltage of the battery pack 6 can be greater than or equal to 10V and less than or equal to 20V, for example, 12V, 18V, 20V, etc.; alternatively, the nominal voltage of the battery pack 6 can be greater than or equal to 20V and less than or equal to 100V, for example, 24V, 40V, 56V, 80V, etc.

[0057] Furthermore, the circumferential surface of the positioning seat 122 is defined as the first positioning surface 122a. The first positioning surface 122a is provided with positioning grooves 122f. There are four positioning grooves 122f. Specifically, two positioning grooves 122f are distributed on each of the front and rear sides of the first positioning surface 122a.

[0058] Please combine Figure 2 and Figure 3 As shown, the upper surface of the housing 1 is provided with a second positioning surface 122b. It should be noted that the second positioning surface 122b is not a plane extending in the left-right direction, but is formed by a combination of a straight positioning surface 122c extending in the left-right direction and an inclined positioning surface 122d extending from the right end of the straight positioning surface 122c to the lower right. Specifically, the straight positioning surface 122c is formed on the top surface of the motor mounting part 12, while the inclined positioning surface 122d extends from the right end of the main body 11 and the right end of the motor mounting part 12. Furthermore, the right end of the main body 11 protrudes further to the right than the right end of the motor mounting part 12, and the right end of the main body 11 is inclined relative to the left-right direction.

[0059] In addition, slits 122e are provided on both the flat positioning surface 122c and the inclined positioning surface 122d.

[0060] Please combine Figure 2 and Figure 5 As shown, a clamping seat 124 is provided on the inclined positioning surface 122d. The clamping seat 124 is recessed in the inclined positioning surface 122d to form a clamping cavity 124e. A clamping protrusion 124a is formed on the inner side of the clamping cavity 124e. Specifically, the clamping protrusion 124a is a hollow frame, which is composed of a rectangular frame and a semi-circular frame. A first window 124d is formed on the inner side of the clamping protrusion 124a.

[0061] Furthermore, the circumferential outer surface of the clamping protrusion 124a is defined as the first mating surface 124b, and the right side surface of the clamping protrusion 124a is defined as the first adhesive surface 124c.

[0062] Please see Figure 3As shown, the drive system 2 includes a motor assembly 21 disposed in the motor mounting part 12 and a transmission assembly 22 disposed in the main body part 11. The transmission assembly 22 is connected to the lower end of the motor assembly 21. In this embodiment, the motor assembly 21 is an external rotor motor and includes a motor housing 211, a stator 212 mounted in the motor housing 211, a rotor 214 connected to the motor housing 211, and a motor shaft 213 fixed to the rotor 214. The motor shaft 213 extends in the vertical direction and extends to the main body part 11 and is connected to the transmission assembly 22.

[0063] Furthermore, the aforementioned transmission assembly 22 is housed in the main body 11. The transmission assembly 22 includes a housing 221 and a reduction mechanism 222 installed inside the housing 221. The power generated by the rotation of the rotor 214 is transmitted to the reduction mechanism 222 of the reduction mechanism 22 through the motor shaft 213.

[0064] In this embodiment, the pump unit 3 is driven by the transmission assembly 22. The pump unit 3 has a pump body 31, a pressure chamber 311 formed within the pump body 31 and extending in the left-right direction, a water inlet 34 connected to the lower end of the pump body 31, a water outlet 35 connected to the left end of the pump body 31, and a plunger 32 that extends at least partially into the pressure chamber 311. The pressure chamber 311 is the location where the pump unit 3 pressurizes the external water flow. Specifically, the plunger 32 extends in the left-right direction, is perpendicular to the motor shaft 213, and is connected to the reduction mechanism 222 of the transmission assembly 22, reciprocating in the left-right direction. A pressure boosting mechanism 33 is connected to the right end of the plunger 32. In this embodiment, the pressure boosting mechanism 33 is preferably a helical spring. The plunger 32 is driven by the reduction mechanism 222 to reciprocate in the pressure chamber 311. External water enters from the inlet end 34, flows through the pressure chamber 311, and flows out from the outlet end 35. The reciprocating motion of the plunger 32 pressurizes the external water entering the pressure chamber 311.

[0065] Furthermore, the pump unit 3 is provided with a first check valve 38 between the inlet end 34 and the pressure chamber 311, and a second check valve 39 between the pressure chamber 311 and the outlet end 35. After the high-pressure washer 100 is started, the plunger 32 will reciprocate. During the process of the plunger 32 moving to the right, the first check valve 38 opens and the second check valve 39 closes, and the external water flows into the pressure chamber 311 through the inlet end 34. The pressurizing mechanism 33 is in an energy storage state due to compression. During the process of the plunger 32 moving to the left, the first check valve 38 closes and the second check valve 39 opens, the pressurizing mechanism 33 returns to its original state, and the stored energy acts on the plunger 32 to increase the pressure sprayed from the outlet end 35.

[0066] In this embodiment, the output section 9 is a nozzle, which is connected to the water outlet 35 of the pump unit 3 and the nozzle is connected to the left end of the main body 11. The external water flow discharged from the water outlet 35 is emitted outward through the nozzle.

[0067] In this embodiment, the water outlet 35 is arranged facing the left side of the main body 11 and the water outlet direction of the water outlet 35 is also facing the left side, and the right end of the main body 11 is arranged at an angle relative to the water outlet direction of the water outlet 35.

[0068] Please combine Figure 2 and Figure 3 As shown, the motor assembly 21 also includes a fan 215 mounted on the upper end of the motor shaft 213. The housing 1 has an air inlet 111 and an air outlet 123. The fan 215 rotates to form a cooling airflow. This cooling airflow enters from the air inlet 111, flows sequentially through the transmission assembly 22 and the motor assembly 21, and exits from the air outlet 123. Since the motor assembly 21 and the transmission assembly 22 generate a large amount of heat during high-speed operation, the air inlet 111 and the air outlet 123 are provided in the housing 1, and the fan 215 of the motor assembly 21 rotates to form a cooling airflow that enters from the air inlet 111 and exits from the air outlet 123, thereby effectively dissipating heat from the motor assembly 21 and the transmission assembly 22.

[0069] In this embodiment, the air inlet 111 is located on the lower side of the main body 11, and the air outlet 123 is located on the upper side of the first positioning surface 122a of the motor mounting part 12. The fan 215 is a centrifugal fan, and the position of the air outlet 123 corresponds to the position of the fan 215, so that the cooling airflow can be smoothly discharged outward through the air outlet 123. Furthermore, the pump unit 3 is housed in the main body 11, and the water inlet 34 of the pump unit 3 extends downward. The main body 11 has a recessed portion 112 that at least partially houses the water inlet 34. The air inlet 111 is located in the recessed portion 112, so that the cooling airflow can also flow through the pump unit 3 and effectively dissipate heat from the pump unit 3.

[0070] Please see Figure 2 and Figure 3As shown, the triggering system 4 is installed in the grip 13. The triggering system 4 includes a trigger 41 in the shape of a long rod and a switch 42 triggered by the trigger 41. In this embodiment, the switch 42 is preferably a micro switch. The switch 42 is installed inside the grip 13, and the trigger 41 is mounted on the housing 1 via a pivot 411. The user can rotate the trigger 41 around the pivot 411 by operating the trigger 41. Further, the switch 42 includes a switch body 421 housed in the grip 13, a spring 423 connected to the switch body 421, and a trigger button 422. A trigger rod 412 is provided on the side of the trigger 41 facing the switch 42. The trigger rod 412 can slide on the spring 423 of the switch 42 while the trigger 41 is rotating, and the trigger button 422 is pressed by the spring 423, thereby triggering the switch 42.

[0071] In this embodiment, the lower part 112 and the foot 14 are spaced apart, and the trigger 41 is located between the lower part 112 and the foot 14.

[0072] Please combine Figure 5 As shown, the control system 5 includes a control circuit board 51 housed in the main body 11 and a display unit 52 electrically connected to the control circuit board 51. In this embodiment, the display unit 52 is a display panel. The display unit 52 is located at the right end of the housing 1 and is mounted in the clamping cavity 124e. The surface of the display unit 52 exposed from the clamping cavity 124e is flush with the first adhesive surface 124c. The display unit 52 includes a first indicator area 522 that displays the power information of the battery pack 6 and a second indicator area 523 that displays the operating status information of the pump unit 3. The operating status information of the pump unit 3 includes instantaneous pressure parameters when the high-pressure washer 100 is working.

[0073] Specifically, the control circuit board 51 is configured to acquire the power information of the battery pack 6 and the operating status information of the pump unit 3, and display the power information of the battery pack 6 and the operating status information of the pump unit 3 through the display unit 52.

[0074] In this embodiment, an operation button 521 is provided at the lower end of the display unit 52 near the gripping part 13. In this embodiment, the operation button 521 is preferably a membrane switch, and the first indicator area 522 and the second indicator area 523 are located above the operation button 521.

[0075] In this embodiment, the switch 42, motor assembly 21, operation button 521 and battery pack 6 are all electrically connected to the control circuit board 51.

[0076] In this embodiment, the aforementioned cooling airflow also flows through the control circuit board 51 to effectively dissipate heat from the control circuit board 51. Furthermore, a second air inlet can be provided at the location where the control circuit board 51 is placed on the housing 1 to further enhance the heat dissipation effect on the control circuit board 51.

[0077] The operation of the high-pressure washer 100 is as follows: The user first operates trigger 41, activating switch 42. Switch 42 sends a first trigger signal to control circuit board 51. Simultaneously, control circuit board 51 controls the first indicator area 522 and the second indicator area 523 on display unit 52 to illuminate, and the high-pressure washer 100 enters standby mode. It should be noted that at this time, the first indicator area 522 and the second indicator area 523 will be displayed in a blurred format as "888" and "8888," rather than displaying specific parameter values. After display unit 52 is activated, the user can then press operation button 521 with their thumb. Control circuit board 51 receives a second trigger signal from operation button 521, which controls the motor assembly 21 to start. Furthermore, after control circuit board 51 starts motor assembly 21, the first indicator area 522 will display the actual battery level of battery pack 6, and the second indicator area 523 will display the actual operating status of pump unit 3.

[0078] In this embodiment, the trigger 41 and switch 42 constitute at least a part of the first switch assembly, and the operation button 521 constitutes at least a part of the second switch assembly. To prevent user misoperation and ensure user safety, in this embodiment, the control circuit board 51 needs to receive a first trigger signal from the first switch assembly and a second trigger signal from the second switch assembly before it can start the motor assembly 21, thereby starting the high-pressure washer 100. That is, the user must perform at least two actions to start the machine, effectively preventing user misoperation and greatly increasing safety.

[0079] Preferably, the control circuit board 51 receives a first trigger signal from the first switch assembly and a second trigger signal from the second switch assembly in sequence, thereby starting the motor assembly 21. That is, the user needs to operate the trigger 41 first and then press the operation button 521 to start the motor assembly 21.

[0080] To further ensure user safety when using the high-pressure washer 100, maintaining the motor assembly 21 in the active state requires the user to continuously press the trigger 41 and activate the switch 42. That is, if the user releases the trigger 41 during use, the control circuit board 51 receives the closing signal from the switch 42, the motor assembly 21 will stop, and the high-pressure washer 100 will also stop. However, the operation button 521 can maintain the active state of the motor assembly 21 without continuous pressing after being pressed once.

[0081] In this embodiment, the high-pressure washer 100 has a first drive mode that outputs low-pressure water flow and a second drive mode that outputs high-pressure water flow. After the control circuit board 51 starts the motor assembly 21, pressing the operation button 521 can switch between the first drive mode and the second drive mode.

[0082] Preferably, when the control circuit board 51 starts the motor assembly 21, it operates in the first drive mode by default. This ensures that the high-pressure washer 100 outputs low-pressure water by default, guaranteeing user safety.

[0083] Please see Figure 2 As shown, the high-pressure washer 100 includes a self-locking member 43 installed on the trigger 41. The self-locking member 43 has a locked state and an unlocked state. In the locked state, the trigger 41 cannot move, thus preventing the switch 42 from being triggered. In the unlocked state, the trigger 41 can move freely, thus triggering the switch 42. Therefore, the user needs to perform three actions to start the machine: first, press the self-locking member 43 to unlock it, and then operate the trigger 41 and press the operation button 521 to start the high-pressure washer 100. This further reduces the possibility of user misoperation and increases safety.

[0084] Please see Figure 3 As shown, the high-pressure washer 100 includes a linkage mechanism 37 connected between the water inlet valve 36 and the first switch assembly. During the triggering of the first switch assembly, i.e., when the user operates the trigger 41, the linkage mechanism 37 will also move synchronously to open the water inlet valve 36. Thus, the user can open the water inlet valve 36 at the same time as triggering the switch 42 with a single action (i.e., operating the trigger 41), making the operation simpler and providing a better user experience.

[0085] Specifically, the trigger 41 includes a trigger lever 41a and a linkage lever 41b mounted on the trigger lever 41a. A trigger lever 412 is also mounted on the trigger lever 41a. The trigger lever 41a is mounted on the housing 1 via a pivot part 411, and the linkage lever 41b and the trigger lever 412 are located on both sides of the pivot part 411. Operating the trigger lever 41a simultaneously drives the trigger lever 412 to trigger the switch 42, and drives the linkage mechanism 37 to move via the linkage lever 41b.

[0086] Please see Figure 7 As shown, the linkage mechanism 37 includes a first arm 371 connected to the linkage rod 41b, a second arm 372 connected to the water inlet valve 36, and a pivot 373 located between the first arm 371 and the second arm 372. The movement of the linkage rod 41b causes the first arm 371 and the second arm 372 to rotate around the pivot 373.

[0087] In this embodiment, the linkage rod 41b protrudes from the left end of the trigger lever 41a toward the linkage mechanism 37, and the linkage rod 41b is located between the first arm 371 and the transmission assembly 22. Furthermore, the linkage mechanism 37 is housed within the recessed portion 112, and the linkage mechanism 37 is located to the right of the water inlet end 34 and below the plunger 32.

[0088] In this embodiment, the right side of the water inlet valve 36 has a valve stem 361, which extends in the left and right direction. The second arm 372 of the linkage mechanism 37 abuts against the valve stem 361 and drives the valve stem 361 to move. During the movement of the valve stem 361 to the left, the water inlet valve 36 will be opened.

[0089] Please see Figure 3 As shown, the control circuit board 51 is housed and mounted in the main body 11 and extends at least partially to the motor mounting portion 12. Specifically, the right end of the transmission assembly 22 is spaced apart from the right end of the main body 11 to form a first storage space, and the right end of the motor assembly 21 is spaced apart from the right end of the motor mounting portion 12 to form a second storage space. The first and second storage spaces are connected, and the control circuit board 51 is housed within both the first and second storage spaces. By rationally arranging the positions of the motor assembly 21, the transmission assembly 22, and the control circuit board 51, the internal space of the high-pressure washer 100 can be fully utilized, resulting in a more rational layout and meeting diverse user needs.

[0090] Furthermore, the right end of the main body 11 and the right end of the motor mounting part 12 are arranged at an angle relative to the left and right direction. The display part 52 extends on the right end face of the main body 11 and the right end face of the motor mounting part 12 to facilitate the user's observation of the display part 52. The control circuit board 51 is arranged at an angle relative to the motor shaft 213 on the end side of the transmission assembly 22, and the control circuit board 51 is located between the transmission assembly 22 and the display part 52. Furthermore, the control circuit board 51 is located between the operation button 521 and the trigger 41.

[0091] Furthermore, the display unit 52 is arranged at an angle relative to the motor shaft 213, and the control circuit board 51 is located between the motor shaft 213 and the display unit 52.

[0092] Furthermore, the axis of the output section 9 and the axis of the plunger 32 extend through the control circuit board 51.

[0093] In this embodiment, the control circuit board 51 includes a controller assembly 511 electrically connected to the motor assembly 21 and a heat sink 512 for cooling the controller assembly 511. The heat sink 512 has a cavity 513 for accommodating the controller assembly 511. The opening of the cavity 513 faces away from the motor assembly 21 and the transmission assembly 22 to facilitate the routing of internal wires of the high-pressure washer 100. In addition, the heat generated by the controller assembly 511 is radiated outward through the heat sink 512. The heat dissipation surface of the heat sink 512 is positioned facing the transmission assembly 22 so that the cooling airflow flows smoothly through the heat dissipation surface of the heat sink 512 to effectively improve the heat dissipation efficiency of the heat sink 512.

[0094] In this embodiment, the display unit 52, switch 42, motor assembly 21, operation button 521 and battery pack 6 are all electrically connected to the controller assembly 511.

[0095] In this embodiment, the switch 42 is disposed on the lower side adjacent to the controller assembly 511 to reduce the wiring distance between the switch 42 and the controller assembly 511.

[0096] Please see Figure 2 As shown, the operation button 521 and the trigger 41 are located on both sides of the grip 13. When the user's palm grips the grip 13, the trigger 41 and the operation button 521 can be operated with only one hand, making the operation more comfortable.

[0097] In this embodiment, the display section 52 and the operation button 521 are located at the right end of the main body 11. The display section 52, the operation button 521, and the output section 9 are located on both sides of the main body 11, and the axis of the output section 9 does not extend through the display section 52.

[0098] Furthermore, the axis of the aforementioned plunger 32 does not extend through the display section 52.

[0099] Please see Figure 1 and Figure 2 As shown, because the motor assembly 21 of the high-pressure washer 100 is close to the air outlet 123, when the user performs cleaning operations, the high-speed jet of water splashes everywhere, causing water to easily enter the motor assembly 21 from the air outlet 123, thus affecting the normal operation of the high-pressure washer 100. Therefore, in this embodiment, the high-pressure washer 100 includes a cover 7 installed on the top of the housing 1. The cover 7 is fitted onto the motor mounting part 12 and covers the air outlet 123, so water cannot enter the interior of the high-pressure washer 100 from the air outlet 123, which helps to extend the service life of the high-pressure washer 100.

[0100] It should be noted that although the air outlet 123 is covered by the cover 7, there is still a certain gap between the inner wall of the cover 7 and the air outlet 123, through which the cooling airflow discharged from the air outlet 123 can be discharged to the outside. Furthermore, a notch 711 is provided on the cover 7, through which the cooling airflow discharged from the air outlet 123 flows out, ensuring the heat dissipation performance of the high-pressure washer 100.

[0101] Please see Figure 2 and Figure 4 As shown, the aforementioned housing 7 has a straight section 71 extending in the left-right direction, an inclined section 72 extending downward from the straight section 71, and a recessed area 73 extending inward from the surface of the inclined section 72; the recessed area 73 has a base plate 731 and a second window 732 penetrating the base plate 731. The outline of the base plate 731, the outline of the second window 732, and the outline of the clamping protrusion 124a are the same. Here, the inner edge of the base plate 731 is defined as the second mating surface 731a, and the right side surface of the base plate 731 is defined as the second adhesive surface 731b.

[0102] Furthermore, the inner circumferential surface of the aforementioned cover 7 is defined as the first locking surface 74, and the inner bottom surface of the cover 7 perpendicular to the first locking surface 74 is defined as the second locking surface 75. The second locking surface 75 is divided into a straight locking surface 751 extending in the left-right direction and an inclined locking surface 752 extending from the straight locking surface 751 to the lower right. The straight locking surface 751 is the inner bottom surface of the straight section 71. The first locking surface 74 and the second locking surface 75 are also provided with a latching element 76. Specifically, the latching element 76 is divided into a latch 762 protruding from the inside of the first locking surface 74 and a latching rib 761 extending from the first locking surface 74 to the second locking surface 75. In addition to the latching element 76, the first locking surface 74 and the second locking surface 75 are also provided with a number of anti-collision ribs 763.

[0103] The assembly of the cover 7 and the housing 1 will be described next. Please refer to [link / reference]. Figures 2 to 6 When the cover 7 is installed on the housing 1, the lower end face of the cover 7 abuts against the flange support surface 121a, the first locking surface 74 covers the first positioning surface 122a, and the second locking surface 75 covers the second positioning surface 122b; and the locking rib 761 is inserted into the slit 122e, the buckle 762 is fastened to the positioning groove 122f, and the anti-collision rib 763 abuts against the first positioning surface 122a and the second positioning surface 122b.

[0104] In this embodiment, after the cover 7 is installed onto the housing 1, the first window 124d is located inside the second window 732, and the display part 52 is exposed from the first window 124d and the second window 732; and the first mating surface 124b and the second mating surface 731a abut against each other, and the first adhesive surface 124c, the second adhesive surface 731b and the surface of the display part 52 are located in the same plane; here, the area formed by the first adhesive surface 124c, the second adhesive surface 731b and the surface of the display part 52 is defined as the first contour surface 78, that is, the first contour surface 78 is the surface area inside the recessed area 73 after the cover 7 is installed onto the housing 1.

[0105] Since the cover 7 and the housing 1 are only connected by retaining ribs 761 and clips 762, the cover 7 inevitably shakes during the operation of the high-pressure washer 100. Therefore, in this embodiment, a faceplate 8 is provided to further secure the cover 7. Figure 2 and Figure 6 The faceplate 8 has a second contour surface 81 formed by a combination of rectangles and semicircles. The shape of the second contour surface 81 is the same as the shape of the first contour surface 78, and the area of ​​the second contour surface 81 is the same as the area of ​​the first contour surface 78. That is, if the faceplate 8 is placed in the recessed area 73, the faceplate 8 will completely cover the first window 124d, the second window 732 and the display part 52, and the second contour surface 81 and the first contour surface 78 will completely overlap.

[0106] In addition, the side of the faceplate 8 that is attached to the first contour surface 78 must also be adhesive. When the faceplate 8 is attached to the first contour surface 78, the first adhesive surface 124c, the second adhesive surface 731b, and the surface of the display part 52 are respectively adhered by the faceplate 8, thereby greatly reducing the shaking between the cover 7 and the housing 1. Furthermore, the faceplate 8 must be made of a light-transmitting material, so that after the faceplate 8 is installed and fixed, the information on the display part 52 can be transmitted through the faceplate 8 in the form of light for the user to view.

[0107] This invention is not limited to the specific embodiments described above. Those skilled in the art will readily understand that many alternative power tools can be developed without departing from the principles and scope of this invention. The scope of protection of this invention is defined by the claims.

Claims

1. A power tool, comprising a housing, a motor assembly mounted on the housing, a transmission assembly connected to the motor assembly, an output unit driven by the transmission assembly, and a control circuit board for controlling the motor assembly; characterized in that: The housing includes a main body, a motor mounting portion connected to the upper side of the main body, and a grip portion connected to the lower side of the main body. The motor assembly is disposed in the motor mounting portion, and the transmission assembly is housed in the main body. The right end of the transmission assembly is spaced apart from the right end of the main body to form a first storage space, and the right end of the motor assembly is spaced apart from the right end of the motor mounting portion to form a second storage space. The first storage space and the second storage space are connected. The control circuit board is housed in the first storage space and the second storage space. The right end of the main body protrudes further to the right than the right end of the motor mounting portion, and the control circuit board is arranged obliquely on the end side of the transmission assembly relative to the motor shaft of the motor assembly.

2. The power tool according to claim 1, characterized in that: The main body extends in the left-right direction, the motor assembly is housed in the motor mounting part, and the motor shaft of the motor assembly extends to the main body and is connected to the transmission assembly.

3. The power tool according to claim 2, characterized in that: The power tool includes a display unit disposed at the end of the housing, and the control circuit board is located between the transmission assembly and the display unit.

4. The power tool according to claim 3, characterized in that: The display unit is arranged at an angle relative to the motor shaft, and the control circuit board is located between the motor shaft and the display unit.

5. The power tool according to claim 4, characterized in that: The display unit extends from the right end face of the main body and the right end face of the motor mounting unit.

6. The power tool according to claim 2, characterized in that: The control circuit board is housed in the main body and extends at least partially into the motor mounting portion.

7. The power tool according to claim 3, characterized in that: The control circuit board includes a controller assembly electrically connected to the motor assembly, and the display unit is electrically connected to the controller assembly.

8. The power tool according to claim 7, characterized in that: The control circuit board includes a heat sink for cooling the controller assembly, the heat sink having a cavity for housing the controller assembly, the opening of the cavity being away from the motor assembly and the transmission assembly.

9. The power tool according to claim 2, characterized in that: The motor assembly includes a fan mounted on the motor shaft. The housing has an air inlet and an air outlet. The fan rotates to generate a cooling airflow. The cooling airflow enters from the air inlet, flows sequentially through the transmission assembly and the motor assembly, and exits from the air outlet.

10. The power tool according to claim 9, characterized in that: The air inlet is located on the lower side of the main body, and the air outlet is located on the upper side of the motor mounting part.

11. The power tool according to claim 9, characterized in that: The cooling airflow passes through the control circuit board.

12. The power tool according to claim 9, characterized in that: The power tool includes a cover mounted on the housing, the cover being fitted over the motor mounting portion and the cover shielding the air outlet.

13. The power tool according to claim 9, characterized in that: The power tool includes a pump unit driven by the transmission assembly, the pump unit being housed within the main body, and the cooling airflow flowing through the pump unit.

14. The power tool according to claim 13, characterized in that: The pump unit includes a pump body, an inlet end located on the lower side of the pump body, and an outlet end located on the left side of the pump body. The main body has a recessed portion that at least partially accommodates the inlet end, and the air inlet is opened in the recessed portion.

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