Electric tool

Abstract

An electric tool (100), which is mounted with a battery pack (200) detachably inserted into the electric tool (100). The electric tool (100) comprises a housing (1), an electric motor assembly (2) mounted in the housing (1), a switching assembly (5) for controlling the electric motor assembly (2) to start and stop, a transmission assembly (3) connected to the electric motor assembly (2), and an output end (4) connected to the transmission assembly (3), wherein the electric motor assembly (2) drives the output end (4) to rotate. The housing (1) comprises a first housing (11) accommodating the electric motor assembly (2), a second housing (12) accommodating the transmission assembly (3), and a mounting base (13) configured for the mounting of a battery pack (200), wherein the first housing (11) is provided with a handle portion (14) for a user to grip; the second housing (12) and the mounting base (13) are located at front and rear ends of the first housing (11); the mounting base (13) is provided with an insertion slot (131); the insertion slot (131) is provided with an opening and a bottom opposite the opening; and the battery pack (200) is mounted in the insertion slot (131) through the opening. The included angle between the extension direction of the insertion slot (131) and the axis of the electric motor assembly (2) is less than 90 degrees. Such an arrangement is conducive to enhancing and improving the user experience and comfort when a user operates the tool.

Description

power tools Technical Field

[0001] This application relates to the field of power tools, and in particular to a power tool used in decoration, construction and other similar applications. Background Technology

[0002] Power tools, especially DC-powered power tools, typically utilize a battery pack to power a motor, which in turn drives the end effector to perform operations. In the prior art, the housing of a DC tool includes a motor housing that houses the motor, a grip for the user to hold, and a battery mounting portion for sliding insertion / removal of the battery pack. The grip is connected to the motor housing, and the battery mounting portion is connected to the grip.

[0003] In addition, the user experience of operating tools varies depending on the tool's construction. For example, the size and type of the tool's casing, the placement of the motor, and the direction of the battery pack insertion all affect the user's operating experience. An unreasonable tool construction often affects the user's operating comfort and reduces the user's work efficiency, making it difficult to gain the user's favor.

[0004] Therefore, it is indeed necessary to provide an improved power tool to overcome the shortcomings of the existing technology. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this application is to provide an ergonomic power tool to improve or enhance the user's experience and comfort when operating the tool.

[0006] This application addresses the existing technical problems by adopting the following technical solution: A power tool with a battery pack detachably inserted into it. The power tool includes a housing, a motor assembly installed within the housing, 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 drives the output end to rotate. The housing includes a first housing housing the motor assembly, a second housing housing the transmission assembly, and a mounting base for mounting the battery pack. The first housing has a handle portion for a user to grip. The second housing and the mounting base are located at the front and rear ends of the first housing. The mounting base has a insertion slot with an opening and a bottom opposite the opening. The battery pack is installed into the insertion slot through the opening, and the angle between the extension direction of the insertion slot and the axis of the motor assembly is less than 90 degrees. The extension direction of the insertion slot refers to the direction from the opening of the insertion slot to the bottom of the insertion slot.

[0007] A further improvement is as follows: the switch assembly includes a switch element electrically connected to the motor assembly and a switch trigger that triggers the switch element; the mounting base has a first portion and a second portion disposed opposite to the first end, the first portion being closer to the output end than the second portion; the second housing has a protrusion disposed adjacent to the switch trigger; the battery pack has a first end disposed near the first portion and a second end disposed near the second portion; the first end and the protrusion form a receiving area, and the switch trigger is received in the receiving area.

[0008] A further improvement is that the mounting base has an inclined surface, which is arranged at an angle relative to the axis of the motor assembly, and the inclined surface and the first housing are connected by an arc.

[0009] A 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] A further improvement is that the angle between the insertion slot and the axis of the motor assembly is 50 to 70 degrees.

[0011] A 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] A further improvement is that the diameter of the handle portion is between 120mm and 180mm.

[0013] A further improvement is as follows: the power tool includes 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 housed in the mounting base, the controller assembly has a controller base plate, and the controller base plate is inclined relative to the axis of the motor assembly.

[0014] A further improvement is as follows: the power tool includes wires connected between the motor assembly, the switch assembly, and the controller assembly, the switch element having a through wiring channel, and at least a portion of the wires passing through the wiring channel.

[0015] A further improvement is as follows: the motor assembly includes 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 an air inlet and an air outlet. The air inlet is located near the controller assembly, and the air outlet is located near the fan. The fan is a centrifugal fan.

[0016] A further improvement is as follows: the motor assembly includes a first bearing and a second bearing supported on both sides of the 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.

[0017] A further improvement is as follows: the power tool has a first gear and a second gear. In the first gear, the transmission ratio of the power tool is 1:5, and in the second gear, the transmission ratio of the power tool is 1:15.

[0018] A further improvement is as follows: in the first gear, the output speed of the power tool is 2700 r / min to 3300 r / min, and in the second gear, the output speed of the power tool is 900 r / min to 1100 r / min.

[0019] This application can also solve the existing technical problems by adopting the following technical solution: an electric tool, characterized in that: the electric tool includes a housing, a motor assembly installed in the housing, a transmission assembly connected to the front end of the motor assembly, and an output end connected to the transmission assembly, the motor assembly driving the output end to rotate; the housing includes a first housing housing the motor assembly, a second housing housing the transmission assembly, and a mounting base for installing a battery pack; characterized in that: the battery pack is inserted into the mounting base at an angle relative to the axis of the motor assembly, the housing includes a shift knob and a switch trigger, the shift knob is configured to switch the gear of the electric tool, the switch trigger is configured to start or stop the motor assembly, and the shift knob and the switch trigger are respectively located on both sides of the transmission assembly.

[0020] A further improvement is as follows: the battery pack has a first end and a second end disposed opposite to the first end, the first end being closer to the output end than the second end; the second housing has a protrusion disposed adjacent to the switch trigger; the first end and the protrusion form an accommodating area; the shift knob is mounted on the second housing; and the switch trigger is mounted on the first housing.

[0021] A further improvement is that the power tool has a controller assembly connected to the motor assembly, the controller assembly has a controller base plate, and the controller base plate is inclined relative to the axis of the motor assembly.

[0022] The present application can also solve the problems of the prior art by adopting the following technical solutions: an electric tool, including a housing, a motor assembly installed in the housing, an output terminal driven by the motor assembly, and a switch assembly for controlling the start and stop of the motor assembly;

[0023] The switching assembly includes a switching element electrically connected to the motor assembly, a switching trigger for actuating the switching element, and an anti-locking switch mounted on the switching trigger. The switching trigger is at least partially exposed outside the housing for user operation. The switching trigger is a long lever type trigger, and the end of the switching trigger is pivotally mounted to the housing. The anti-locking switch is located on the opposite side of the end of the switching trigger.

[0024] A further improvement is as follows: the power tool includes a connecting part that cooperates with the anti-locking switch, the connecting part includes a connecting surface that contacts the anti-locking switch, the anti-locking switch includes a pivot shaft and a connecting arm extending from the pivot shaft toward the connecting part, the connecting arm being arranged at an angle relative to the connecting surface.

[0025] A further improvement is as follows: the anti-locking switch has a first position that restricts the movement of the switch trigger relative to the switch element and a second position that does not restrict the movement of the switch trigger relative to the switch element. In the first position, the end of the anti-locking switch abuts against the mating surface.

[0026] A further improvement is as follows: the anti-locking switch includes an operating part that extends from the pivot axis away from the joint, and the connecting arm contacts the joint surface.

[0027] Compared with the prior art, this application has the following advantages: By setting the angle between the plug slot and the axis of the motor assembly to less than 90 degrees, the battery pack is tilted relative to the axis of the motor assembly when installed in the power tool, reducing the height occupied by the battery pack in the vertical direction. This makes it less likely for the battery pack to interfere with the user's arm when operating the power tool, greatly improving the user experience and comfort. Furthermore, setting the end face of the mounting base near the handle as an inclined surface further reduces the height occupied by the mounting base in the vertical direction, making it less likely for the mounting base to interfere with the user's arm, resulting in more comfortable operation and better ergonomics. The switching element has a through wiring channel, with at least some wires passing through the wiring channel, making the wiring arrangement neater and easier to route. In addition, the angle between the light guide surface and the axis of the motor assembly is between 35 and 60 degrees, so that the lighting component has a better lighting effect. Attached Figure Description

[0028] Figure 1 is a schematic diagram of the power tool according to a preferred embodiment of this application;

[0029] Figure 2 is an exploded view of the power tool shown in Figure 1;

[0030] Figure 3 is a schematic diagram of the internal structure of the power tool shown in Figure 1;

[0031] Figure 4 is a cross-sectional schematic diagram of the power tool shown in Figure 1;

[0032] Figure 5 is an enlarged view of circle D shown in Figure 2;

[0033] Figure 6 is a schematic diagram of the power tool with battery pack shown in Figure 1 placed on a flat surface;

[0034] Figure 7 is a schematic diagram of the anti-locking switch in the power tool shown in Figure 6 not being unlocked;

[0035] Figure 8 is a schematic diagram of the unlocking of the anti-locking switch in the power tool shown in Figure 7;

[0036] Figure 9 is a diagram of the wiring layout in the power tool shown in Figure 6;

[0037] Figure 10 is a schematic diagram of another type of anti-locking switch of the power tool of this application that is not unlocked;

[0038] Figure 11 is a schematic diagram of the unlocking of the anti-locking switch in the power tool shown in Figure 9;

[0039] Figure 12 is a schematic diagram of the switch trigger in the power tool shown in Figure 6. Detailed Implementation

[0040] The present application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0041] The terminology used in this application is for the purpose of describing specific embodiments only and is not intended to limit the application. For example, terms such as "upper," "lower," "front," "rear," "left," and "right" 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 application 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 application.

[0042] Please refer to Figures 1 to 4. This application relates to an electric tool 100, and more particularly to a grinder suitable for polishing and grinding workpiece surfaces. In this embodiment, the electric tool 100 is powered by a battery pack 200, which is detachably installed in the electric tool 100. The electric tool 100 includes a housing 1, a motor assembly 2 installed within the housing 1, a transmission assembly 3 connected to the front end of the motor assembly 2, an output end 4 connected to the transmission assembly 3, a switch assembly 5 controlling the start and stop of the motor assembly 2, and a controller assembly 6 connected to the switch assembly 5. The user starts the motor assembly 2 to rotate by triggering the switch assembly 5. The motor assembly 2 drives the output end 4 to rotate via the transmission assembly 3. Furthermore, the housing 1 includes a first end and a second end, with the output end 4 located at the first end and the battery pack 200 located at the second end. The output end 4 is a chuck assembly; by installing an accessory (not shown) into the chuck assembly, operation can be performed.

[0043] In this 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 a low-speed, high-torque force to meet the user's work requirements.

[0044] In this embodiment, the aforementioned housing 1 includes a first housing 11 housing the motor assembly 2, a second housing 12 housing the transmission assembly 3, and a mounting base 13 for mounting the battery pack 200. The second housing 12 and the mounting base 13 are located on the front and rear sides of the first housing 11, respectively; that is, the first housing 11 is closer to the first end of the housing 1, and the mounting base 13 is closer to the second end of the housing 1. Furthermore, the housing 1 extends along the front-rear direction as a whole, and the output end 4, the transmission assembly 3, and the motor assembly 2 are arranged sequentially along the front-rear direction within the housing 1. Further, the second housing 12 is located at the front, and the output end 4 extends beyond the end of the second housing 12; the first housing 11 is located in the middle, and the first housing 11 forms a handle portion 14 for the user to hold; while the mounting base 13 is located at the rear, and the mounting base 13 is arranged obliquely relative to the extending direction of the second housing 12 and protrudes along the vertical direction perpendicular to the front-rear direction.

[0045] Please refer to Figures 3 and 4. The mounting base 13 has a insertion slot 131 for inserting the battery pack 200 and an inclined surface 132 extending obliquely from the rear end of the first housing 11 relative to the axis A of the motor assembly 2. The insertion slot 131 and the inclined surface 132 are located on opposite sides of the mounting base 13. The angle B formed by the insertion slot 131 and the axis A of the motor assembly 2 is less than 90 degrees. Specifically, the insertion slot 131 has an opening and a bottom opposite to the opening. The battery pack 200 is installed into the insertion slot 131 through the opening. Therefore, the angle between the extension direction of the insertion slot 131 and the axis A of the motor assembly 2 is less than 90 degrees. The extension direction of the insertion slot 131 refers to the direction from the opening of the insertion slot 131 to the bottom of the insertion slot 131.

[0046] Furthermore, the above-mentioned arrangement allows the battery pack 200 to be tilted relative to the axis A of the motor assembly 2 when installed on the power tool 100, thus reducing the height occupied by the battery pack 200 in the vertical direction. 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. In addition, setting the end face of the mounting base 13 near the handle portion 14 as an inclined surface 132, with the inclined surface 132 and the first housing 11 transitioning through an arc, further reduces the height occupied by the mounting base 13 in the vertical direction, making it less likely to interfere with the user's arm, resulting in more comfortable operation and better ergonomics.

[0047] Preferably, the angle B formed by the aforementioned insertion slot 131 and the axis A of the motor assembly 2 is 50 to 70 degrees, further reducing the height occupied by the battery pack 200 in the vertical direction; in extreme or confined working environments, the battery pack 200 will not interfere with the user, further expanding the usage scenarios of the power tool 100 and improving its adaptability and operability.

[0048] Preferably, the angle B formed by the aforementioned insertion slot 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 grip area when the user operates, which is comfortable, conducive to long-term operation, reduces user fatigue, and improves human-computer interaction.

[0049] In this embodiment, the axis A of the motor assembly 2 extends through the transmission assembly 3 and the output end 4; furthermore, the center lines of the output end 4, the transmission assembly 3 and the motor assembly 2 are located on the same central axis; furthermore, 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 as to make the power tool look more aesthetically pleasing.

[0050] In this 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 it more comfortable for the user to hold.

[0051] Please refer to Figures 2 and 4. The switch assembly 5 is installed inside the first housing 11. The switch assembly 5 includes a switch element 51 electrically connected to the motor assembly 2 and a switch trigger 52 that triggers the switch element 51. The switch element 51 is located between the controller assembly 6 and the motor assembly 2. The switch trigger 52 is at least partially exposed outside the first housing 11 for operation by the user.

[0052] In this embodiment, the switch element 51 is the main circuit switch, and the switch trigger 52 is a long lever type trigger. The end of the switch trigger 52 is pivotally mounted to the housing 1. The user starts the motor assembly 2 by pressing the switch trigger 52.

[0053] Preferably, the mounting base 13 has a protrusion 131a extending toward the switch trigger 52. That is, the protrusion 131a is the lowest end of the mounting base 13, and the protrusion 131a is defined as the first part of the mounting base. The first part is closer to the first end of the power tool 100 than the far end 131c of the mounting base. The far end 131c of the mounting base is the highest end of the mounting base 13, and the far end 131c of the mounting base is defined as the second part of the mounting base 13. Referring to FIG6, the battery pack 200 has a first end 200a and a second end 200b. The first end 200a is disposed adjacent to the first part, and the second end 200b is disposed adjacent to the second part. 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 against each other. In addition, the second housing 12 has a protrusion 12a located below the transmission assembly. When the power tool 100... When the battery pack 200 is installed and placed on a flat surface P, the first end 200a and the second protrusion 12a work together to support the power tool 100 and prevent it from tipping over. Furthermore, a receiving area 131b is formed between the first end 200a and the protrusion 12a. Specifically, the receiving area 131b is surrounded by the battery pack 200, the mounting base 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 housed in the receiving area 131b. In addition, the switch assembly 5 also includes a self-locking switch 53. The distance from the first end 200a to the axis A of the motor assembly 2 should be greater than the distance from the bottom of the self-locking switch 53 to the axis A of the motor assembly 2. This ensures that when the power tool 100 is placed on the flat surface P, the self-locking switch 53 will not touch the flat surface P and cause an accidental start.

[0054] For a user to successfully activate the switch element 51, the anti-locking switch 53 must first be unlocked. That is, a connecting part 50 is formed inside the housing 1. The connecting part 50 includes a connecting surface 501 that contacts the anti-locking switch 53. The anti-locking switch 53 can slide along the connecting surface 501 to unlock.

[0055] In this embodiment, the upper connecting part 50 can be configured as shown in FIG7. In this structure, the connecting part 50 includes a connecting part protrusion 50a and a connecting part body 50b. The lower surface of the connecting part body 50b forms a connecting surface 501a. When the anti-locking switch 53 is not rotated, the connecting arm 532 of the anti-locking switch 53 abuts against the connecting part protrusion 50a. At this time, the anti-locking switch 53 restricts the pivoting of the switch trigger 52. When the anti-locking switch 53 rotates, the connecting arm 532 slides on the connecting surface 501a.

[0056] Referring to Figures 10 and 11, this application also provides another anti-locking switch structure. Specifically, the switch trigger 52 includes a pivot 521 connected to and pivoting relative to the housing 1, and a trigger body 522 extending from the pivot 521. The pivot 521 is located near a first end of the housing 1, or near a second end of the housing 1. An anti-locking switch 53 is located on the side of the trigger body 522 away from the pivot 521. The trigger body 522 has a through opening 5221, and the anti-locking switch 53 is at least partially received within and movable within the opening 5221.

[0057] The anti-locking switch 53 includes a pivot shaft 531, a connecting arm 532 extending from the pivot shaft 531 toward the joint 50, and an operating part 533 extending from the pivot shaft 531 away from the joint 50. The connecting arm 532 contacts the joint surface 501. The trigger body 522 has a through hole 5222 on the side wall of the opening 5221, and the pivot shaft 531 is mounted in the opening 5222.

[0058] The unlocking process of the anti-locking switch is described below. The anti-locking switch 53 has a first position that restricts the movement of the switch trigger 52 relative to the switching element 51 and a second position that does not restrict the movement of the switch trigger 52 relative to the switching element 51. That is, the connecting arm 532 contacts the mating surface 501 through the connection point 5321 to slide. In the first position, due to the reverse support force of the mating surface 501 on the connecting arm 532, the user cannot press down the switch trigger 52. In this position, the connection point 5321 is in contact with the pivot shaft 531. The angle formed by the line connecting the center of the connecting point 5321 and the center of the pivot shaft 531 with the mating 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 turn on the switch element 51. In this position, the angle formed by the line connecting the center of the connecting point 5321 and the center of the pivot shaft 531 with the mating 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 center of the connecting point 5321 and the center of the pivot shaft 531 with the mating surface 501 decreases from 90 degrees to 75 degrees. Through the above sliding trigger, the anti-locking switch 53 will not be stuck by the housing 1, so that the switch trigger 52 can be pressed all the way down, avoiding the user having to perform a secondary operation on the switch trigger 52.

[0059] The joint 50 can be configured as a structure with a completely triangular cross section. This structure allows the anti-locking switch 53 to contact the joint surface 501 throughout the entire operation process, thus providing a better user experience.

[0060] Furthermore, the switch trigger 52 includes a latching portion 523 extending from the end of the trigger body 522 away from the pivot 521. The housing 1 includes a latching arm 17 that engages with the latching portion 523 and a dustproof portion 18 connecting the connecting portion 50 and the latching arm 17. The connecting portion 50, the latching arm 17, and the dustproof portion 18 are integrally constructed. Further, at least a portion of the connecting portion 50 extends between the anti-locking switch 53 and the latching portion 523, thereby allowing the anti-locking switch 53 and the connecting portion 50 to contact each other. Further, the dustproof portion 18 forms a space for the latching portion 523 to move, ensuring the normal operation of the switch trigger 52. Further, the engagement between the latching portion 523 and the latching arm 17, and the provision of the dustproof portion 18, effectively prevent external dust from entering the interior of the housing.

[0061] In this embodiment, the controller assembly 6 is housed in the mounting base 13, and the controller assembly 6 is arranged at an angle relative to the axis A of the motor assembly 2, with the axis A of the motor assembly 2 extending through the controller assembly 6.

[0062] Referring to Figures 2 and 5, the power tool 100 includes wires 8 connecting the motor assembly 2, the switch assembly 5, and the controller assembly 6. The switch element 51 has a through wiring channel 511 through which at least a portion of the wires 8 pass. Because there are a large number of wires 8, the wiring channel 511 makes the arrangement of the wires 8 neater and facilitates wiring.

[0063] Please refer to Figures 2 and 4. The motor assembly 2 mentioned above includes a stator 21 and a rotor 22 connected to each other, a fan 23 driven by the rotor 22, and a first bearing 24 and a second bearing 25 supported on the front and rear sides of the rotor shaft 221 of the rotor 22. The first bearing 24 is located in the first housing 11, and the second bearing 25 is located in the second housing 12.

[0064] Furthermore, the stator 21 and 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.

[0065] In this embodiment, the fan 23 is located between the stator 21 and the transmission assembly 3. The housing 1 has a through air inlet 15 and an air outlet 16. The air inlet 15 is located on the mounting base 13 and adjacent to the controller assembly 6, while the air outlet 16 is located adjacent to the fan 23. The fan 23 is a centrifugal fan. While the motor assembly 2 drives the output end 4 to rotate, it also drives the fan 23 to rotate at high speed, thereby generating a cooling airflow that flows in from the air inlet 15 and is discharged from the air outlet 16. The cooling airflow flows sequentially through the controller assembly 6, the switch assembly 5, and the motor assembly 2 to efficiently dissipate heat from the controller assembly 6, the switch assembly 5, and the motor assembly 2.

[0066] In this embodiment, the motor assembly 2 is a brushless DC motor, and the motor assembly 2 also includes a Hall plate 28 that is fixedly mounted to the stator 21 by screws. The Hall plate 28 is electrically connected to the controller assembly 6.

[0067] Please refer to Figures 2 to 4. 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 on the second housing 12 for user operation. 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.

[0068] In this embodiment, the transmission component 3 can switch between two gears: a high-speed gear (first gear) and a low-speed gear (second gear). In the high-speed gear, the power tool 100 is used for grinding operations, at which time the transmission ratio is 1:5 and the output speed is 2700 rpm to 3300 rpm. In the low-speed gear, the power tool 100 is used for drilling operations, at which time the transmission ratio is 1:15 and the output speed is 900 rpm to 1100 rpm.

[0069] Preferably, in the high-speed mode, the output speed of the power tool 100 is 3000 rpm; in the low-speed mode, the output speed of the power tool 100 is 1000 rpm.

[0070] Please refer to Figures 4, 7 to 9, and 12. The power tool 100 also includes a lighting assembly 7 mounted on 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 via a wire 8. The motor assembly 2 is located between the lighting assembly 7 and the controller assembly 6. That is, the wire 8 extends from the lighting assembly 7, passes through the motor assembly 2 and the switch assembly 5, and connects to the controller assembly 6.

[0071] Next, the wiring of the lighting assembly 7 will be described. The wire 8 leading 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 wire 8 are located on both sides of the transmission assembly 3. Subsequently, 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 axis A of the motor assembly 2, the wire 8 needs to extend between the motor assembly 2 and the trigger body 522.

[0072] Furthermore, the wires at the motor assembly 2 are secured by the first wire-locking groove 101 and the second wire-locking groove 102. The first wire-locking groove 101 and the second wire-locking groove 102 are located on both sides of the motor assembly 2. Specifically, the first wire-locking groove 101 is located adjacent to the rotating shaft 521, and the second wire-locking groove 102 is located between the motor assembly 2 and the switching element 51. When the switch trigger 52 is not pressed down, the wires 8 will not fall down under the action of the first wire-locking groove 101 and the second wire-locking groove 102.

[0073] Referring to Figure 12, the trigger body 522 includes a bottom wall 5223 for user operation, a pair of side walls 5224 extending from both sides of the bottom wall 5223 toward 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 a portion of the wire 8 is housed within the clearance space 5228, effectively preventing damage to the wire 8 by the switch trigger 52. Furthermore, the trigger body 522 includes 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 communicates with the clearance space 5228, and the clearance groove 5226 further expands the storage space for the wire 8.

[0074] After 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. This arrangement prevents the trigger button on the lower side of the switch element from damaging the wire.

[0075] Furthermore, the lighting assembly 7 in this embodiment includes a lamp 71 connected to the controller assembly 6 and a lampshade 72 that shields the lamp 71. The lamp 71 is powered by the battery pack 200 and is configured to illuminate the work area in a dim environment. The lampshade 72 is mounted on the front end of the second housing 12 and has a light guide surface 711 through which the light from the lamp 71 passes. 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.

[0076] 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.

[0077] In this embodiment, after the wire 8 leaves the area where the switching element 51 is located, it is finally connected to the controller assembly 6. The controller assembly 6 includes a controller base plate 61 and a capacitor 62 mounted on the controller base plate 61. The controller base plate 61 and the motor assembly 2 sandwich the handle portion 14 in the middle. The controller base plate 61 is used to send control commands to the operation of the motor assembly 2. The capacitor 62 makes the DC power output smooth and stable, reducing the impact of alternating pulsating current on the electronic circuit. Specifically, the axis A of the motor assembly 2 passes through the controller base plate 61 and the capacitor 62. The controller base plate 61 is arranged at an angle relative to the axis A of the motor assembly 2. Since the battery pack 200 is inserted into the mounting base 13 through the insertion slot 131, in order to ensure the compactness of the housing 1 in the vertical direction, the insertion slot 131 should be parallel to the extension direction of the controller base plate 61.

[0078] In addition, since the wire 8 passes through the capacitor 62 when it is connected to the controller board 61, in order to reduce the interference of the capacitor 62 to the wire 8, the capacitor 62 can be set perpendicular to the controller board 61 and can be made to protrude into the first housing 11. Based on this, the capacitor 62 is arranged at an angle of 20 degrees to 40 degrees relative to the axis A of the motor assembly 2, preferably 30 degrees.

[0079] This application sets the angle B formed by the plug slot 131 and the axis A of the motor assembly 2 to less than 90 degrees, so that when the battery pack 200 is installed on the power tool 100, the battery pack 200 is arranged at an angle relative to the axis A of the motor assembly 2, and the height occupied by the battery pack 200 in the vertical 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. Furthermore, setting the end face of the mounting base 13 near the handle portion 14 as an inclined surface 132 reduces the height occupied by the mounting base 13 in the vertical direction, also making it less likely to interfere with the user's arm, making the user's operation more comfortable and more ergonomic. The switching element 51 has a through wiring channel 511, through which at least some of the wires 8 are passed. Since there are a large number of wires 8, the wiring channel 511 makes the arrangement of the wires 8 neater and facilitates wiring. In addition, 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.

[0080] Furthermore, the power tool 100 of this application can be used to repair tires, particularly to grind the inner surface of the tire. Specifically, the inner surface of the tire is cylindrical. When the power tool 100 grinds 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 this chord. In addition, the battery pack 200 is inserted into the mounting base 13 at an angle relative to the axis A of the motor assembly 2, which reduces the contact between the battery pack 200 and the inner surface of the tire when the power tool 100 repairs the tire.

[0081] This application is not limited to the specific embodiments described above. Those skilled in the art will readily understand that many other alternatives to the power tools described herein exist without departing from the principles and scope of this application. The scope of protection of this application is determined by the claims.

Claims

1. A power tool, comprising a battery pack detachably inserted into the power tool, characterized in that: The power tool includes a housing, a motor assembly mounted within the housing, a switch assembly for 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 drives the output end to rotate. The housing includes a first housing housing the motor assembly, a second housing housing the transmission assembly, and a mounting base for mounting the battery pack. The first housing has a handle portion for a user to grip. The second housing and the mounting base are located at the front and rear ends of the first housing. The mounting base has a insertion slot with an opening and a bottom opposite the opening. The battery pack is mounted into the insertion slot through the opening, and the angle between the extension direction of the insertion slot and the axis of the motor assembly is less than 90 degrees.

2. The power tool according to claim 1, characterized in that: The switching assembly includes a switching element electrically connected to the motor assembly and a switching trigger for actuating the switching element. The mounting base has a first portion and a second portion disposed opposite to the first end, the first portion being closer to the output end than the second portion. The second housing has a protrusion adjacent to the switch trigger, and the battery pack has a first end near the first portion and a second end near the second portion. The first end and the protrusion form a receiving area, and the switch trigger is received in the receiving area.

3. The power tool according to claim 1, characterized in that: The mounting base has an inclined surface that is arranged at an angle relative to the axis of the motor assembly, and the inclined surface and the first housing are connected by an arc.

4. The power tool according to claim 1, characterized in 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.

5. The power tool according to claim 1, characterized in that: The angle between the insertion slot and the axis of the motor assembly is 50 to 70 degrees.

6. The power tool according to claim 1, characterized in 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.

7. The power tool according to claim 5, characterized in that: The diameter of the handle portion is between 120mm and 180mm.

8. The power tool according to claim 2, characterized in that: The power tool includes a controller assembly connected to the switch assembly, the switch element being located between the controller assembly and the motor assembly, the controller assembly being housed in the mounting base, the controller assembly having a controller base plate, and the controller base plate being inclined relative to the axis of the motor assembly.

9. The power tool according to claim 8, characterized in that: The power tool includes wires connected between the motor assembly, the switch assembly, and the controller assembly, the switch element having a through wiring channel through which at least a portion of the wires pass.

10. The power tool according to claim 9, characterized in that: The motor assembly includes 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 has an air inlet and an air outlet. The air inlet is located near the controller assembly, and the air outlet is located near the fan. The fan is a centrifugal fan.

11. The power tool according to claim 10, characterized in that: The motor assembly includes a first bearing and a second bearing supported on both sides of a rotor shaft of the rotor, the stator and the fan being located between the first bearing and the second bearing, and the rotor shaft extending into a second housing; the first bearing is located within the first housing, and the second bearing is located within the second housing.

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

15.

13. The power tool according to claim 12, characterized in that: In the first gear, the power tool outputs a speed of 2700 r / min to 3300 r / min, and in the second gear, the power tool outputs a speed of 900 r / min to 1100 r / min.

14. A power tool, characterized in that: The power tool includes a housing, a motor assembly mounted within the housing, a transmission assembly connected to the front end of the motor assembly, and an output end connected to the transmission assembly, wherein the motor assembly drives the output end to rotate; the housing includes a first housing housing the motor assembly, a second housing housing the transmission assembly, and a mounting base for mounting a battery pack; characterized in that: the battery pack is inserted into the mounting base at an angle relative to the axis of the motor assembly; the housing includes a shift knob and a switch trigger, the shift knob being configured to switch the gears of the power tool, and the switch trigger being configured to start or stop the motor assembly; the shift knob and the switch trigger are respectively located on both sides of the transmission assembly.

15. The power tool according to claim 14, characterized in that: The battery pack has a first end and a second end disposed opposite to the first end, the first end being closer to the output end than the second end. The second housing has a protrusion disposed adjacent to the switch trigger. The first end and the protrusion form a receiving area, the switch trigger being received in the receiving area. The shift knob is mounted on the second housing, and the switch trigger is mounted on the first housing.

16. The power tool according to claim 14, characterized in that: The power tool has a controller assembly connected to the motor assembly, the controller assembly having a controller base plate that is inclined relative to the axis of the motor assembly.

17. A power tool, comprising a housing, a motor assembly mounted within the housing, an output terminal driven by the motor assembly, and a switch assembly for controlling the start and stop of the motor assembly; characterized in that: The switching assembly includes a switching element electrically connected to the motor assembly, a switching trigger for actuating the switching element, and an anti-locking switch mounted on the switching trigger. The switching trigger is at least partially exposed outside the housing for user operation. The switching trigger is a long lever type trigger, and the end of the switching trigger is pivotally mounted to the housing. The anti-locking switch is located on the opposite side of the end of the switching trigger.

18. The power tool according to claim 17, characterized in that: The power tool includes a coupling portion that mates with the anti-locking switch. The coupling portion includes a coupling surface that contacts the anti-locking switch. The anti-locking switch includes a pivot shaft and a connecting arm extending from the pivot shaft toward the coupling portion. The connecting arm is arranged at an angle relative to the coupling surface.

19. The power tool according to claim 18, characterized in that: The anti-locking switch has a first position that restricts the movement of the switch trigger relative to the switch element and a second position that does not restrict the movement of the switch trigger relative to the switch element. In the first position, the end of the anti-locking switch abuts against the mating surface.

20. The power tool according to claim 19, characterized in that: The anti-locking switch includes an operating part that extends from the pivot axis away from the coupling part, and the connecting arm contacts the coupling surface.

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