Electric tool

Abstract

The utility model relates to an electric tool which is provided with a battery pack detachably inserted into the electric tool. The electric tool is characterized in that the electric tool comprises a machine shell, a motor assembly installed in the machine shell, a switch assembly controlling starting and stopping of the motor assembly, a transmission assembly connected to the motor assembly and an output end connected to the transmission assembly, and the motor assembly drives the output end to rotate; the machine shell comprises a first machine shell for containing the motor assembly, a second machine shell for containing the transmission assembly and an installation base used for installing the battery pack, a handle part for a user to hold is formed on the first machine shell, and the second machine shell and the installation base are located at the front end and the rear end of the first machine shell. The mounting base is provided with an inserting groove for inserting the battery pack, and the included angle between the inserting groove and the axis of the motor assembly is smaller than 90 degrees. According to the electric tool, the experience feeling and the comfort degree of tool operation of a user can be improved or improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electric power tools, in particular to an electric power tool used in decoration, construction and the like. BACKGROUND

[0002] The electric power tool, in particular the direct current power tool, is usually powered by a battery pack to drive the motor to operate, and further drive the end tool to work. In the prior art, the shell of the direct current tool includes a motor housing accommodating the motor, a holding part for a user to hold, and a battery mounting part for the battery pack to slide and connect / detach, and the holding part is connected to the motor housing, and the battery mounting part is connected to the holding part.

[0003] In addition, the experience of the user operating the tool will be different due to different tool structures, for example, the size type of the tool shell, the placement position of the motor, the connection direction of the battery pack, and the like will all affect the operation experience of the user, and unreasonable tool structure will often affect the operation comfort of the user and reduce the work efficiency of the user, and therefore it is difficult to obtain the favor of the user.

[0004] Therefore, it is necessary to provide an improved electric power tool to overcome the defects in the prior art. CONTENT OF THE INVENTION

[0005] In view of the deficiencies in the prior art, the purpose of the present application is to provide an electric power tool conforming to the ergonomics to improve or enhance the experience and comfort of the user operating the tool.

[0006] The present application solves the problems in the prior art by using the following technical solution: an electric power tool, a battery pack being detachably inserted into the electric power tool, the electric power tool comprising a machine shell, a motor assembly installed in the machine shell, a switch assembly controlling the start and stop of the motor assembly, a transmission assembly connected to the motor assembly, and an output end connected to the transmission assembly, the motor assembly driving the output end to rotate; the machine shell comprises a first machine shell accommodating the motor assembly, a second machine shell accommodating the transmission assembly, and a mounting seat for mounting the battery pack, the first machine shell forming a handle part for a user to hold, the second machine shell and the mounting seat being located at the front and rear ends of the first machine shell, the mounting seat having a connection slot for the battery pack to connect, and the included angle between the connection slot and the axis of the motor assembly being less than 90 degrees.

[0007] Further improvement is that the switch assembly comprises a switch element electrically connected to the motor assembly and a switch trigger for triggering the switch element, the battery pack has a first end and a second end opposite to the first end, the first end is closer to the output end than the second end, the second housing has a protrusion adjacent to the switch trigger, the first end and the protrusion form a containing area, and the switch trigger is contained in the containing area.

[0008] Further improvement is that the mounting seat has an inclined surface, the inclined surface is arranged obliquely relative to the axis of the motor assembly, and the inclined surface and the first housing are connected by a circular arc.

[0009] Further improvement is that the axis of the motor assembly extends through the transmission assembly and the output end, and the center lines of the output end, the transmission assembly and the motor assembly are located on the same central axis.

[0010] Further improvement is that the included angle between the plug-in slot and the axis of the motor assembly is 50-70 degrees.

[0011] Further improvement is that the diameter of the handle portion is smaller than the diameter of the second housing, and the switch assembly is mounted on the first housing.

[0012] Further improvement is that the diameter of the handle portion is 120-180 mm.

[0013] Further improvement is that the electric tool comprises a controller assembly connected to the switch assembly, the switch element of the switch assembly is located between the controller assembly and the motor assembly, the controller assembly is contained in the mounting seat, and the controller assembly is arranged at an angle relative to the axis of the motor assembly.

[0014] Further improvement is that the electric tool comprises a wire connected between the motor assembly, the switch assembly and the controller assembly, the switch element is provided with a wire channel, and at least part of the wire is arranged in the wire channel.

[0015] Further improvement is that the motor assembly comprises a stator and a rotor connected to each other, and a fan driven by the rotor, the fan is located between the stator and the transmission assembly, the housing is provided with a through air inlet and an air outlet, the air inlet is adjacent to the controller assembly, and the air outlet is adjacent to the fan, and the fan is a centrifugal fan.

[0016] Further improvement is that the motor assembly comprises a first bearing and a second bearing supported on two sides of a rotor shaft of the rotor, the stator and the fan are located between the first bearing and the second bearing, and the rotor shaft extends into the second casing; the first bearing is located in the first casing, and the second bearing is located in the second casing.

[0017] Further improvement is that the electric tool has a first gear and a second gear, in the first gear, the transmission ratio of the electric tool is 1:5, and in the second gear, the transmission ratio of the electric tool is 1:15.

[0018] Further improvement is that in the first gear, the output rotation speed of the electric tool is 2700r / min to 3300r / min, and in the second gear, the output rotation speed of the electric tool is 900r / min to 1100r / min.

[0019] The application solves the problems of the prior art, and also uses the following technical scheme: an electric tool comprises a casing, a motor assembly installed in the casing, a transmission assembly connected to the front end of the motor assembly, and an output end connected to the transmission assembly, the motor assembly drives the output end to rotate; the casing comprises a first casing for accommodating the motor assembly, a second casing for accommodating the transmission assembly, and a mounting seat for mounting the battery pack; characterized in that: the battery pack is inserted into the mounting seat in an inclined manner relative to the axis of the motor assembly, the second casing is provided with a gear shifting knob, the first casing is provided with a switch trigger, and the gear shifting knob and the switch trigger are located on two sides of the transmission assembly, respectively.

[0020] Further improvement is that the battery pack has a first end and a second end opposite to the first end, the first end is closer to the output end than the second end, the second casing has a protrusion arranged adjacent to the switch trigger, the first end and the protrusion form a containing area, and the switch trigger is accommodated in the containing area.

[0021] Further improvement is that the electric tool has a controller assembly connected to the motor assembly, the controller assembly has a controller substrate, and the controller substrate is arranged in an inclined manner relative to the axis of the motor assembly.

[0022] Compared with the prior art, the application has the following beneficial effects: by setting the included angle between the plug-in slot and the axis of the motor assembly to be less than 90 degrees, when the battery pack is installed to the power tool, the battery pack is arranged to be inclined relative to the axis of the motor assembly, the height occupied by the battery pack in the up-down direction is reduced, the battery pack is not easy to interfere with the arm of the user when the user operates the power tool, and the experience and comfort of the user are greatly improved; and the end face of the mounting seat close to the handle part is set to be an inclined surface, so that the height occupied by the mounting seat in the up-down direction is reduced, and the mounting seat is not easy to interfere with the arm of the user, the user is more comfortable, and it is more in line with ergonomics; the switch element is provided with a wire passing channel, and at least part of the wires are arranged in the wire passing channel, so that the arrangement of the wires is more neat and convenient; in addition, the angle between the light guide surface and the axis of the motor assembly is between 35 degrees and 60 degrees, so that the lighting assembly has better lighting effect. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a schematic diagram of the whole machine of the power tool of the preferred embodiment of the application;

[0024] Figure 2 is an exploded schematic diagram of the power tool shown in Figure 1

[0025] Figure 3 is a schematic diagram of the internal structure of the power tool shown in Figure 1

[0026] Figure 4 is a schematic diagram of the power tool shown in Figure 1

[0027] Figure 5 is an enlarged view of circle D shown in Figure 2

[0028] Figure 6 is a schematic diagram of the power tool shown in Figure 1

[0029] Figure 7 is a schematic diagram of the power tool shown in Figure 6

[0030] Figure 8 is a schematic diagram of the power tool shown in Figure 7

[0031] Figure 9 is a schematic diagram of the power tool shown in Figure 6

[0032] Figure 10 ​​​​​​​​is another schematic view of the electric power tool of the present application, showing an unlocked reverse self-locking switch;

[0033] Figure 11 is Figure 9 is another schematic view of the electric power tool of the present application, showing an unlocked reverse self-locking switch;

[0034] Figure 12 is Figure 6 is another schematic view of the electric power tool of the present application, showing an unlocked reverse self-locking switch. DETAILED DESCRIPTION

[0035] The present application will be further described below in conjunction with the accompanying drawings and embodiments.

[0036] The terms used in the present application are merely for the purpose of describing particular embodiments and are not intended to limit the present application. For example, the words "upper", "lower", "front", "back", "left", "right", and the like used in the following description are merely for the purpose of illustration based on the orientations or positional relationships shown in the drawings, and are merely for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices / elements referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0037] Referring to Figures 1 to 4 The embodiment of the present application relates to an electric power tool 100, and particularly relates to a sander, which is suitable for polishing, sanding and the like operations on a workpiece surface. In the embodiment, the electric power tool 100 is powered by a battery pack 200, and the battery pack 200 is detachably mounted to the electric power tool 100. The electric power tool 100 comprises a housing 1, a motor assembly 2 mounted in the housing 1, a transmission assembly 3 connected to a front end of the motor assembly 2, an output end 4 connected to the transmission assembly 3, a switch assembly 5 for controlling the start and stop of the motor assembly 2, and a controller assembly 6 connected to the switch assembly 5. A user triggers the switch assembly 5 to start the motor assembly 2 to rotate, and the motor assembly 2 drives the output end 4 to rotate via the transmission assembly 3. Further, the housing 1 comprises opposite first and second ends, the output end 4 is located at the first end, and the battery pack 200 is located at the second end. The output end 4 is a chuck assembly, and an accessory (not shown) is mounted to the chuck assembly to perform an operation.

[0038] In the embodiment, the transmission assembly 3 has a planetary gear reduction mechanism 31, and the transmission assembly 3 is configured to convert the high-speed low-torque force of the motor assembly 2 into low-speed high-torque force to meet the operation requirements of the user.

[0039] In the embodiment, the casing 1 includes a first casing 11 housing the motor assembly 2, a second casing 12 housing the transmission assembly 3, and a mounting seat 13 for mounting the battery pack 200. The second casing 12 and the mounting seat 13 are respectively located on the front and rear sides of the first casing 11, i.e., the first casing 11 is close to the first end of the casing 1, and the mounting seat 13 is close to the second end of the casing 1. Moreover, the casing 1 as a whole extends along the front-rear direction, and the output end 4, the transmission assembly 3, and the motor assembly 2 are sequentially arranged in the casing 1 along the front-rear direction. Further, the second casing 12 is arranged at the front, the output end 4 extends beyond the end of the second casing 12, the first casing 11 is arranged at the middle, and the first casing 11 is formed with a handle portion 14 for a user to hold, and the mounting seat 13 is arranged at the rear, and the mounting seat 13 is arranged obliquely relative to the extension direction of the second casing 12 and protrudes along the up-down direction perpendicular to the front-rear direction.

[0040] Referring to FIGS. 1 to 3, Figure 3 and Figure 4 As shown in FIGS. 1 to 3, the mounting seat 13 has a plug-in groove 131 for the battery pack 200 to plug in and an inclined surface 132 extending obliquely from the rear end of the first casing 11 relative to the axis A of the motor assembly 2. The plug-in groove 131 and the inclined surface 132 are located on opposite sides of the mounting seat 13, and the included angle B between the plug-in groove 131 and the axis A of the motor assembly 2 is less than 90 degrees. Thus, when the battery pack 200 is mounted to the power tool 100, the battery pack 200 is arranged obliquely relative to the axis A of the motor assembly 2, and the height occupied by the battery pack 200 in the up-down direction is reduced. Therefore, when the user operates the power tool 100, the battery pack 200 is less likely to interfere with the user's arm, greatly improving the user's experience and comfort. Moreover, the end surface of the mounting seat 13 close to the handle portion 14 is arranged as the inclined surface 132, and the inclined surface 132 and the first casing 11 are connected by a circular arc, so that the height occupied by the mounting seat 13 in the up-down direction is reduced, and the mounting seat 13 is less likely to interfere with the user's arm, making the user more comfortable and more in line with ergonomics.

[0041] Preferably, the included angle B between the plug-in groove 131 and the axis A of the motor assembly 2 is 50 to 70 degrees, and the height occupied by the battery pack 200 in the up-down direction is further reduced. In an extreme or narrow working environment, the battery pack 200 also does not interfere with the user, and the use scenarios of the power tool 100 are further expanded, improving the adaptability and operability.

[0042] Preferably, the included angle B between the plug-in groove 131 and the axis A of the motor assembly 2 is 60 degrees, so that the overall center of gravity of the power tool 100 and the battery pack 200 is located in the holding area of the user when operating, the comfort is high, it is beneficial to long-time operation, reduces the user's fatigue, and improves human-computer interaction.

[0043] In the embodiment, the axis A of the motor assembly 2 extends through the transmission assembly 3 and the output end 4; further, the center lines of the output end 4, the transmission assembly 3 and the motor assembly 2 are located on the same center axis; further, the center lines of the output end 4, the transmission assembly 3 and the motor assembly 2 are all located on the axis A of the motor assembly 2, so that the appearance of the power tool is more beautiful.

[0044] In the embodiment, the diameter of the handle portion 14 is smaller than the diameter of the second housing 12, and the diameter of the handle portion 14 is 120mm to 180mm, which makes the user hold more comfortable.

[0045] As shown in Figure 2 and Figure 4 , the switch assembly 5 is installed in the first housing 11, and the switch assembly 5 includes a switch element 51 electrically connected to the motor assembly 2 and a switch trigger 52 for triggering the switch element 51, the switch element 51 is located between the controller assembly 6 and the motor assembly 2, and the switch trigger 52 is at least partially exposed outside the first housing 11 for the user to operate.

[0046] In the embodiment, the switch element 51 is a main circuit switch, and the switch trigger 52 is a long rod trigger, the end of the switch trigger 52 is pivotally installed to the housing 1, and the user starts the motor assembly 2 by pressing the switch trigger 52.

[0047] Preferably, the mounting seat 13 is formed with a protrusion 131a protruding towards the side of the switch trigger 52, that is, the protrusion 131a is the lowermost end of the mounting seat 13, which is closer to the first end of the power tool 100 than the distal end 131c of the mounting seat 13, wherein the distal end 131c of the mounting seat 13 is the uppermost end of the mounting seat 13; please refer to Figure 6As shown, the battery pack 200 has a first end 200a and a second end 200b, the first end 200a is closer to the output end 4 than the second end 200b, the first end 200a and the protrusion 131a abut; in addition, the second housing 12 is provided with a protrusion 12a at a position below the transmission assembly, when the electric tool 100 is installed with the battery pack 200 and the battery pack is placed on the flat surface P, the first end 200a and the second protrusion 12a jointly act to support the electric tool 100 and prevent it from falling over, further, a containing area 131b is formed between the first end 200a and the protrusion 12a, specifically, the containing area 131b is surrounded by the battery pack 200, the mounting seat 13, the first housing 11 and the second housing 12, and is located at the lower end of the axis A of the motor assembly 2, the switch trigger 52 is completely contained in the containing area 131b; in addition, the switch assembly 5 further comprises an anti-self-locking switch 53, the distance between the first end 200a and the axis A of the motor assembly 2 should be greater than the distance between the bottom end of the anti-self-locking switch 53 and the axis A of the motor assembly 2, so that when the electric tool 100 is placed on the flat surface P, the anti-self-locking switch 53 will not touch the flat surface P and accidental starting will not occur.

[0048] In order for the user to successfully start the switch element 51, the anti-self-locking switch 53 must be unlocked first, that is, the inside of the housing 1 is protrudingly formed with a joint portion 50, the joint portion 50 comprises a joint surface 501 in contact with the anti-self-locking switch 53, and the anti-self-locking switch 53 can slide along the joint surface 501 to be unlocked.

[0049] In the present embodiment, the upper hand joint portion 50 can be provided as in the structure shown in Figure 7 , in which the joint portion 50 comprises a joint portion protrusion 50a and a joint portion body 50b, the lower surface of the joint portion body 50b forms a joint surface 501a, when the anti-self-locking switch 53 is not rotated, the connecting arm 532 of the anti-self-locking switch 53 abuts against the joint portion protrusion 50a, at this time the anti-self-locking switch 53 restricts the pivoting of the switch trigger 52, when the anti-self-locking switch 53 is rotated, the connecting arm 532 slides on the joint surface 501a.

[0050] Please refer to Figure 10 and Figure 11 , the present application further provides another anti-self-locking switch structure. Specifically, the switch trigger 52 comprises a rotating shaft 521 connected to the housing 1 and pivoted relative to the housing 1, and a trigger body 522 extending from the rotating shaft 521, the rotating shaft 521 is close to the first end of the housing 1, or the rotating shaft is close to the second end of the housing 1. The anti-self-locking switch 53 is arranged on the side of the trigger body 522 away from the rotating shaft 521, the trigger body 522 is provided with an opening 5221, and the anti-self-locking switch 53 is at least partially contained in the opening 5221 and moves in the opening 5221.

[0051] The anti-self-locking switch 53 comprises a pivot shaft 531, a connecting arm 532 extending from the pivot shaft 531 towards the joint 50, and a handle 533 extending from the pivot shaft 531 away from the joint 50, the connecting arm 532 contacting the joint surface 501. The trigger body 522 is provided with a through hole 5222 in the side wall of the opening 5221, and the pivot shaft 531 is installed in the through hole 5222.

[0052] Next, the unlocking process of the anti-self-locking switch is described. The anti-self-locking switch 53 has a first position in which the movement of the switch trigger 52 relative to the switch element 51 is limited, and a second position in which the movement of the switch trigger 52 relative to the switch element 51 is not limited, i.e., the connecting arm 532 contacts the joint surface 501 through the connecting point 5321 and slides: in the first position, the user cannot press down the switch trigger 52 due to the reverse support force of the joint surface 501 on the connecting arm 532, and in this position, the angle formed by the line connecting the connecting point 5321 and the center of the pivot shaft 531 and the joint surface 501 is 90 degrees; when the connecting arm 532 slides to the second position, the user can press down the switch trigger 52 to make the switch element 51 turn on, and in this position, the angle formed by the line connecting the connecting point 5321 and the center of the pivot shaft 531 and the joint surface 501 is 75 degrees, that is, when the connecting arm 532 slides from the first position to the second position, the angle formed by the line connecting the connecting point 5321 and the center of the pivot shaft 531 and the joint surface 501 decreases from 90 degrees to 75 degrees. Through the above sliding trigger, the anti-self-locking switch 53 will not be stuck by the casing 1, so that the switch trigger 52 can be pressed to the bottom, avoiding the user's secondary operation on the switch trigger 52.

[0053] In this embodiment, the joint 50 can be provided as a structure with a completely triangular cross-section, which can make the entire operation process of the anti-self-locking switch 53 contact the joint surface 501, so that the user has a better experience.

[0054] In addition, the switch trigger 52 comprises a buckling portion 523 extending from the end of the trigger body 522 away from the rotating shaft 521, the casing 1 comprises a buckling arm 17 fitted to the buckling portion 523 and a dustproof portion 18 connected between the joint 50 and the buckling arm 17, and the joint 50, the buckling arm 17 and the dustproof portion 18 are of an integrated structure. Further, at least part of the joint 50 extends between the anti-self-locking switch 53 and the buckling portion 523, so that the anti-self-locking switch 53 and the joint 50 can be in contact; further, the dustproof portion 18 forms a space for the buckling portion 523 to move, which ensures the normal operation of the switch trigger 52; further, the cooperation between the buckling portion 523 and the buckling arm 17 and the provision of the dustproof portion 18 can effectively prevent external dust from entering the inside of the casing.

[0055] In the embodiment, the controller assembly 6 is received in the mounting base 13 and is arranged at an angle relative to the axis A of the motor assembly 2, which extends through the controller assembly 6.

[0056] Please refer to Figure 2 and Figure 5 As shown in Figs. 1 and 2, the electric tool 100 includes electric wires 8 connected between the motor assembly 2, the switch assembly 5 and the controller assembly 6, and the switch assembly 5 is provided with a wire passage 511 through which at least part of the electric wires 8 are arranged. The wire passage 511 makes the arrangement of the electric wires 8 more neat and facilitates the arrangement of the electric wires 8 due to the large number of the electric wires 8.

[0057] Please refer to Figure 2 and Figure 4 As shown in Figs. 1 and 2, the electric tool 100 includes electric wires 8 connected between the motor assembly 2, the switch assembly 5 and the controller assembly 6, and the switch assembly 5 is provided with a wire passage 511 through which at least part of the electric wires 8 are arranged. The wire passage 511 makes the arrangement of the electric wires 8 more neat and facilitates the arrangement of the electric wires 8 due to the large number of the electric wires 8.

[0058] Further, the stator 21 and the fan 23 are located between the first bearing 24 and the second bearing 25, and the rotor shaft 221 extends into the second housing 12 and is connected to the transmission assembly 3.

[0059] In the embodiment, the fan 23 is located between the stator 21 and the transmission assembly 3, and the housing 1 is provided with a through air inlet 15 and a through air outlet 16. The air inlet 15 is formed in the mounting base 13 and is located adjacent to the controller assembly 6, and the air outlet 16 is located adjacent to the fan 23. The fan 23 is arranged as a centrifugal fan. When the motor assembly 2 drives the output 4 to rotate, the fan 23 is also driven to rotate at a high speed to generate a cooling airflow flowing into the air inlet 15 and flowing out of the air outlet 16. The cooling airflow sequentially flows through the controller assembly 6, the switch assembly 5 and the motor assembly 2 to efficiently cool the controller assembly 6, the switch assembly 5 and the motor assembly 2.

[0060] In the embodiment, the motor assembly 2 is a brushless direct current motor, and the motor assembly 2 further includes a Hall plate 28 fixedly installed to the stator 21 by screws. The Hall plate 28 is electrically connected to the controller assembly 6.

[0061] Please refer to Figures 2 to 4As shown, the transmission assembly 3 includes a shift wire 32 connected to the planetary gear reduction mechanism 31 and a shift knob 33 for moving the shift wire 32, the shift knob 33 is exposed to the second housing 12 for user to operate, and the shift knob 33 is configured to change the transmission ratio of the planetary gear reduction mechanism 31, in order not to affect the user's operation of the switch trigger 52, the shift knob 33 and the switch trigger 52 are located on the upper and lower sides of the transmission assembly 3.

[0062] In the present embodiment, the transmission assembly 3 can be switched between a high-speed gear (first gear) and a low-speed gear (second gear), in the high-speed gear, the electric tool 100 is used for polishing work, at this time, the transmission ratio is 1:5, and the output rotation speed is 2700 rpm to 3300 rpm, in the low-speed gear, the electric tool 100 is used for drilling work, at this time, the transmission ratio is 1:15, and the output rotation speed is 900 rpm to 1100 rpm.

[0063] Preferably, in the high-speed gear, the output rotation speed of the electric tool 100 is 3000 rpm, and in the low-speed gear, the output rotation speed of the electric tool 100 is 1000 rpm.

[0064] Please refer to Figure 4 , Figures 7 to 9 and Figure 12 As shown, the electric tool 100 further includes a lighting assembly 7 installed at the front end of the second housing 12, that is, the lighting element 7 is located at the first end of the housing 1 and adjacent to the output end 4. The lighting assembly 7 is connected to the controller assembly 6 through the electric wire 8, and the motor assembly 2 is located between the lighting lamp assembly 7 and the controller assembly 6, that is, the electric wire 8 extends from the lighting assembly 7, passes through the motor assembly 2 and the switch assembly 5, and is connected to the controller assembly 6.

[0065] Next, the wiring of the lighting assembly 7 is described, the electric wire 8 extending from the lighting assembly 7 first extends between the transmission assembly 3 and the inner wall of the housing 1, in this area, the shift knob 33 and the electric wire 8 are located on both sides of the transmission assembly 3. Then, since the trigger body 522 is located between the controller assembly 6 and the lighting assembly 7, and the lighting assembly 7 and the trigger body 522 are located on the same side of the axis A of the motor assembly 2, the electric wire 8 needs to extend between the motor assembly 2 and the trigger body 522.

[0066] Further, the electric wire at the motor assembly 2 is held by a first wire retaining groove 101 and a second wire retaining groove 102, the first wire retaining groove 101 and the second wire retaining groove 102 are located on both sides of the motor assembly 2, specifically, the first wire retaining groove 101 is located adjacent to the rotating shaft 521, and the second wire retaining groove 102 is located between the motor assembly 2 and the switch element 51, when the switch trigger 52 is not pressed down, the electric wire 8 will not fall under the action of the first wire retaining groove 101 and the second wire retaining groove 102.

[0067] Turning to Figure 12 The trigger body 522 comprises a bottom wall 5223 for user operation, a pair of side walls 5224 extending from both sides of the bottom wall 5223 towards the motor assembly 2, and a clearance space 5228 formed by the bottom wall 5223 and the pair of side walls 5224. When the switch trigger 52 is pressed down, at least part of the wire 8 is accommodated in the clearance space 5228, effectively avoiding damage to the wire 8 by the switch trigger 52. In addition, the trigger body 522 comprises a reinforcing rib 5225 protruding from the bottom wall 5223 and a clearance groove 5226 defined by the reinforcing rib 5225. The clearance groove 5226 is communicated with the clearance space 5228, and the provision of the clearance groove 5226 further expands the accommodation space of the wire 8.

[0068] When the wire 8 leaves the area where the motor assembly 2 is located, the wire 8 passes through the switch element 51. At this time, part of the wire 8 is arranged on the side of the switch element 51. Such an arrangement prevents the trigger button on the lower side of the switch element from damaging the wire.

[0069] Further, the lighting assembly 7 in the embodiment comprises a lighting lamp 71 connected to the controller assembly 6 and a lampshade 72 shielding the lighting lamp 71. The lighting lamp 71 is powered by the battery pack 200 and is configured to illuminate the working area in a dim environment. The lampshade 72 is installed at the front end of the second housing 12. The lampshade 72 has a light guide surface 711 through which the light of the lighting lamp 71 penetrates. The angle C between the light guide surface 711 and the axis A of the motor assembly 2 is between 35 degrees and 60 degrees, so that the lighting assembly 7 has a better lighting effect.

[0070] Preferably, the angle C between the light guide surface 711 and the axis A of the motor assembly 2 is between 40 degrees and 60 degrees.

[0071] In the embodiment, after the wire 8 leaves the area where the switch element 51 is located, the wire 8 is finally connected to the controller assembly 6. The controller assembly 6 comprises a controller substrate 61 and a capacitor 62 mounted on the controller substrate 61. The controller substrate 61 and the motor assembly 2 sandwich the handle portion 14 therebetween. The controller substrate 61 is used to send control instructions to the operation of the motor assembly 2. The capacitor 62 smoothes and stabilizes the direct current output of the power supply, thereby reducing the influence of alternating pulsating current on the electronic circuit. Specifically, the axis A of the motor assembly 2 penetrates the controller substrate 61 and the capacitor 62. The controller substrate 61 is arranged obliquely relative to the axis A of the motor assembly 2. Since the battery pack 200 is inserted through the insertion slot 131 and the mounting seat 13, the insertion slot 131 should be parallel to the extension direction of the controller substrate 61 to ensure the compactness of the housing 1 in the up-down direction.

[0072] In addition, the electric wire 8 passes through the capacitor 62 when connected to the controller substrate 61. In order to reduce the interference of the capacitor 62 to the electric wire 8, the capacitor 62 is arranged perpendicularly to the controller substrate 61 and protrudes into the first casing 11. In this way, the capacitor 62 is arranged at an angle of 20-40 degrees, preferably 30 degrees, relative to the axis A of the motor assembly 2.

[0073] The present application sets the included angle B between the plug-in slot 131 and the axis A of the motor assembly 2 to be less than 90 degrees. When the battery pack 200 is installed to the power tool 100, the battery pack 200 is arranged obliquely relative to the axis A of the motor assembly 2, and the height occupied by the battery pack 200 in the up-down direction is reduced. Therefore, the battery pack 200 is less likely to interfere with the user's arm when the user operates the power tool 100, greatly improving the user's experience and comfort. The end surface of the mounting seat 13 close to the handle portion 14 is set as an inclined surface 132, so that the height occupied by the mounting seat 13 in the up-down direction is reduced, and the mounting seat 13 is less likely to interfere with the user's arm, making the user more comfortable and more in line with ergonomics. The switch element 51 is provided with a wire passage 511 through which at least part of the electric wire 8 passes. Since the number of electric wires 8 is large, the wire passage 511 makes the arrangement of the electric wires 8 more neat and facilitates wire arrangement. In addition, the angle C between the light guide surface 711 and the axis A of the motor assembly 2 is between 35 and 60 degrees, so that the lighting assembly 7 has better lighting effect.

[0074] Further, the power tool 100 in the present application can be used for repairing a tire, especially for polishing the inner surface of the tire. Specifically, the inner surface of the tire is cylindrical. When the power tool 100 polishes the inner surface of the tire, the axis A of the motor assembly 2 and the tire define a chord, and during the repair process of the power tool 100, the axis A of the motor assembly 2 is parallel to the chord. In addition, the battery pack 200 is inserted into the mounting seat 13 in an inclined manner relative to the axis A of the motor assembly 2, which can reduce the contact between the battery pack 200 and the inner surface of the tire during the repair of the power tool 100.

[0075] The present application is not limited to the above specific embodiments. Those skilled in the art can easily understand that the power tool of the present application has many other alternatives without departing from the principles and scope of the present application. The scope of protection of the present application is subject to the contents of the claims.

Claims

1. A power tool to which a battery pack is detachably attached, characterized by: The electric tool comprises a housing, a motor assembly installed in the housing, a switch assembly controlling start and stop of the motor assembly, a transmission assembly connected to the motor assembly and an output end connected to the transmission assembly, the motor assembly driving the output end to rotate; the housing comprises a first housing accommodating the motor assembly, a second housing accommodating the transmission assembly and a mounting seat for mounting the battery pack, the first housing is formed with a handle portion for a user to hold, the second housing and the mounting seat are located at the front and rear ends of the first housing, the mounting seat has a plug-in slot for the battery pack to plug in, and an angle between the plug-in slot and an axis of the motor assembly is less than 90 degrees.

2. The power tool of claim 1, wherein: The switch assembly comprises a switch element electrically connected to the motor assembly and a switch trigger triggering the switch element, the battery pack has a first end portion and a second end portion opposite to the first end portion, the first end portion is closer to the output end than the second end portion, the second housing has a protrusion adjacent to the switch trigger, the first end portion and the protrusion form a containing area, and the switch trigger is accommodated in the containing area.

3. The power tool of claim 1, wherein: The mounting seat has an inclined surface, the inclined surface is arranged to be inclined relative to the axis of the motor assembly, and a circular arc is arranged between the inclined surface and the first housing.

4. The power tool of claim 1, wherein: The axis of the motor assembly extends through the transmission assembly and the output end, and a center line of the output end, the transmission assembly and the motor assembly is located on the same central axis.

5. The power tool of claim 1, wherein: The angle between the plug-in slot and the axis of the motor assembly is 50 degrees to 70 degrees.

6. The power tool of claim 1, wherein: A diameter of the handle portion is less than a diameter of the second housing, and the switch assembly is installed in the first housing.

7. The power tool of claim 5, wherein: The diameter of the handle portion is 120 mm to 180 mm.

8. The power tool of any one of claims 1 to 7, characterized by: The electric tool comprises a controller assembly connected to the switch assembly, the switch element of the switch assembly is located between the controller assembly and the motor assembly, the controller assembly is accommodated in the mounting seat, and the controller assembly is arranged to be angled relative to the axis of the motor assembly.

9. The power tool of claim 8, wherein: The electric tool comprises an electric wire connected between the motor assembly, the switch assembly and the controller assembly, the switch element is provided with a wire passing channel, and at least part of the electric wire is arranged to pass through the wire passing channel.

10. The power tool of claim 9, wherein: The motor assembly comprises a stator and a rotor connected to each other and a fan driven by the rotor, the fan is located between the stator and the transmission assembly, the housing is provided with a through air inlet and an air outlet, the air inlet is adjacent to the controller assembly, and the air outlet is adjacent to the fan, and the fan is a centrifugal fan.

11. The power tool of claim 10, wherein: The motor assembly comprises a first bearing and a second bearing supporting two sides of a rotor shaft of the rotor, the stator and the fan are located between the first bearing and the second bearing, and the rotor shaft extends into the second housing; the first bearing is located in the first housing, and the second bearing is located in the second housing.

12. The power tool of any one of claims 1 to 7, characterized by: The electric tool has a first gear and a second gear, in the first gear, the transmission ratio of the electric tool is 1:5, in the second gear, the transmission ratio of the electric tool is 1:

15.

13. The power tool of claim 12, wherein: In the first gear, the output rotation speed of the electric tool is 2700r / min to 3300r / min, in the second gear, the output rotation speed of the electric tool is 900r / min to 1100r / min.

14. A power tool characterized by: The electric tool includes a shell, a motor assembly installed in the shell, a transmission assembly connected to the front end of the motor assembly, and an output end connected to the transmission assembly, the motor assembly drives the output end to rotate; the shell includes a first shell accommodating the motor assembly, a second shell accommodating the transmission assembly, and a mounting seat for mounting a battery pack; characterized in that: The battery pack is inserted into the mounting seat relative to the axis of the motor assembly, the second shell is provided with a gear shifting knob, the first shell is provided with a switch trigger, and the gear shifting knob and the switch trigger are respectively located on both sides of the transmission assembly.

15. The power tool of claim 14, wherein: The battery pack has a first end and a second end opposite to the first end, the first end is closer to the output end than the second end, the second shell has a protrusion adjacent to the switch trigger, the first end and the protrusion form a containing area, and the switch trigger is accommodated in the containing area.

16. The power tool of claim 14, wherein: The electric tool has a controller assembly connected to the motor assembly, the controller assembly has a controller substrate, and the controller substrate is inclined relative to the axis of the motor assembly.

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