Power tool

Abstract

The application relates to an electric tool, which comprises a housing, a motor, an output shaft rotatably supported in the output housing and used for outputting work externally, and a transmission mechanism, and further comprises a fastening connector used for connecting the output housing, a gear box housing and the motor housing, wherein the fastening connector comprises a first connector integrally formed on the motor housing and a second connector which is sequentially arranged through the motor housing and the gear box housing and detachably connected with the first connector; one end of the first connector is formed on the motor housing, and the other end extends forward and is at least partially inserted into the gear box housing. In the electric tool, the insert nut is extended forward by a certain length and inserted into the front housing, so that the insert nut can also bear a certain shearing force, thereby reducing the shearing force acting on the screw.

Description

[Technical Field]

[0001] This application relates to the field of construction equipment technology, and in particular to an electric tool. [Background Technology]

[0002] Power tools are portable tools driven by electric motors, such as electric wrenches, electric screwdrivers, electric drills, and electric nail guns.

[0003] Some high-torque wrenches use a method where the gearbox screw is tightened by inserting a nut into the motor barrel, and then tightening the gearbox screw from the gearbox toward the motor barrel. This method is prone to screw breakage.

[0004] Therefore, it is indeed necessary to provide an improved power tool to overcome the shortcomings of the prior art. [Utility Model Content]

[0005] In view of the shortcomings of the prior art, the purpose of this application is to provide an electric tool in which the insert nut extends forward and is inserted into the front housing, so that the insert nut can also withstand a certain shear force, thereby reducing the shear force acting on the screw.

[0006] The technical solution adopted by this application to solve the problem of the prior art is: an electric tool, comprising:

[0007] The housing includes a motor housing, a gearbox housing, and an output housing distributed along the front-to-back direction;

[0008] An electric motor, housed in the motor housing, is used to provide power to the power tool;

[0009] An output shaft, which is rotatably supported by the output housing, is used for external output operations;

[0010] A transmission mechanism, housed in the gearbox housing, is connected to the motor and the output shaft respectively to transmit power from the motor to the output shaft;

[0011] The power tool also includes a fastening connector for connecting the output housing, gearbox housing, and motor housing. The fastening connector includes a first connector integrally formed in the motor housing and a second connector that passes through the motor housing and gearbox housing in sequence and is detachably connected to the first connector.

[0012] The first connecting member has one end formed in the motor housing and the other end extending forward and at least partially inserted into the gearbox housing.

[0013] A further improvement is as follows: the first connecting member is a fastening nut, which is integrally injection molded into the motor housing, and the front end of the first connecting member is open.

[0014] A further improvement is as follows: the second connecting member is a fastening bolt, which is inserted into the output housing and the gearbox housing from front to back and threaded to the first connecting member.

[0015] A further improvement is as follows: the motor housing has a first main body portion for accommodating the motor and a first connecting portion extending radially outward from the outer peripheral surface of the first main body portion. The first connecting portion forms a first hole with a front opening. The first connecting member is formed in the first hole, and the front end of the first connecting member protrudes from the front end surface of the first connecting portion.

[0016] A further improvement is proposed: the protrusion length of the front end of the first connector is in the range of 3mm-6mm.

[0017] A further improvement is as follows: the gearbox housing has a second main body portion for accommodating the transmission mechanism and a second connecting portion extending radially outward from the outer peripheral surface of the second main body portion. The second connecting portion is formed with a second hole extending in the front-rear direction, and the front end of the first connecting member is inserted into the second hole.

[0018] A further improvement is as follows: the output housing has a third main body for rotatably supporting the output shaft and a third connecting part extending radially outward from the outer peripheral surface of the third main body. The third connecting part forms a third hole extending in the front-rear direction. The second connecting member passes through the third hole and the second hole in sequence and is threadedly connected to the first connecting member.

[0019] A further improvement is that the second hole has a first diameter adapted to the first connector and a second diameter adapted to the second connector, wherein the second diameter is located at the front end of the first diameter.

[0020] A further improvement is that the gap between the outer circumferential surface of the first connector and the first diameter is in the range of 0.05mm-0.1mm.

[0021] A further improvement is that the gap between the outer circumferential surface of the second connector and the second diameter is in the range of 0.3mm-0.5mm.

[0022] Another technical solution of this application is: an electric tool, comprising:

[0023] The housing includes a motor housing, a gearbox housing, and an output housing distributed along the front-to-back direction;

[0024] An electric motor, housed in the motor housing, is used to provide power to the power tool;

[0025] A transmission mechanism, housed in the gearbox housing, is connected to the motor drive.

[0026] An output shaft, which is rotatably supported by the output housing, is driven by the transmission mechanism for external operation;

[0027] The power tool also includes a fastening connector for connecting the output housing, gearbox housing, and motor housing. The fastening connector includes a first connector and a second connector. The first connector is integrally formed in one of the motor housing or the output housing. The second connector passes through the other one in sequence and is connected to the gearbox housing and is detachably connected to the first connector.

[0028] Wherein, at least one end of the first connecting member adjacent to the gearbox housing is inserted into the gearbox housing.

[0029] Another technical solution of this application is: an electric tool, comprising:

[0030] The housing includes a motor housing and an output housing distributed along the front-to-back direction;

[0031] An electric motor, housed in the motor housing, is used to provide power to the power tool;

[0032] An output shaft, which is rotatably supported by the output housing, is used for external output operations;

[0033] The power tool also includes a fastening connector for connecting the output housing and the motor housing. The fastening connector includes a first connector integrally formed in the motor housing and a second connector that passes through the motor housing and the output housing in sequence and is detachably connected to the first connector.

[0034] The first connector has one end formed in the motor housing and the other end extending forward and at least partially inserted into the output housing.

[0035] Compared with the prior art, this application has the following beneficial effects:

[0036] In the power tool of this application, a section of the front end of the first connecting member, which is integrally formed in the motor housing, extends forward and is inserted into the front gearbox housing or output housing, so that the first connecting member can also withstand a certain shear force. This reduces the shear force acting on the second connecting member, thereby preventing the second connecting member from breaking due to excessive shear force. [Image Description]

[0037] The specific embodiments of this application will be described in further detail below with reference to the accompanying drawings:

[0038] Figure 1 This is a perspective view of the power tools described in this application;

[0039] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the power tool shown in the image from another direction;

[0040] Figure 3 yes Figure 1 Left view of the power tool shown;

[0041] Figure 4 yes Figure 1 An exploded view of the power tool housing shown in the image;

[0042] Figure 5 yes Figure 1 A cross-sectional view of the power tool shown;

[0043] Figure 6 yes Figure 1 A schematic diagram of the power tool handle housing after removing the half-shell;

[0044] Figure 7 yes Figure 1 The exploded view of the power tool shown is of its components;

[0045] Figure 8 yes Figure 1 The power tool shown is displayed as an exploded view of the component from another direction;

[0046] Figure 9 yes Figure 1 The power tool shown is displayed in a side cross-sectional view of its components;

[0047] Figure 10 This is a cross-sectional view of the connection between the motor housing and the gearbox housing of the power tool in this application via a fastening fastener;

[0048] Figure 11 yes Figure 1 A schematic diagram of the illumination range of the power tool lighting assembly shown in the figure;

[0049] Figure 12 These are the dimensional parameters of each component of the power tool of this application.

[0050] Meaning of the reference numerals in the diagram:

[0051] 100. Power tools

[0052] 1. Shell,

[0053] 11. Main housing; 111. Output housing; 111a. Third main body part; 111b. Third connecting part; 111c. Third hole; 112. Gearbox housing; 112a. Second main body part; 112b. Second connecting part; 112c. Second hole; 113. Motor housing; 113a. Cylindrical part; 113b. First connecting part; 113c. First hole; 114. Rear cover.

[0054] 12. Handle housing; 12a. First half-shell; 12b. Second half-shell; 121. Grip portion; 122. Protective portion; 122a. Upper connecting section; 122b. Arc transition section; 122c. Lower extension section; 122d. Lower connecting section; 122e. First mounting position; 122f. Second mounting position; 122g. Lead wire groove; 122h. Clearance notch.

[0055] 2. Output shaft, 21. Support bearing,

[0056] 3. Motor; 31. Front bearing; 32. Rear bearing.

[0057] 4. Speed ​​reduction assembly

[0058] 5. Impact components,

[0059] 6. Battery pack,

[0060] 7. Lighting components; 71. Light-emitting components; 711. Circuit board; 712. Light source; 72. Light-transmitting components.

[0061] 8. Display components,

[0062] 81. Protective cover; 811. First mounting post; 812. Second mounting post; 813. Third mounting post; 814. Mounting channel.

[0063] 82. Control panel; 82a. Straight edge; 82b. Narrowing section; 821. First side; 822. Second side; 823. First through hole; 824. Second through hole; 825. Arc-shaped through groove.

[0064] 83. Operating components,

[0065] 84. Display interface; 841. First end; 842. Second end.

[0066] 85. Switch

[0067] 86. Indicator layer

[0068] 9. Fastening assembly; 9a. Fastener; 9b. Connecting post; 91. First fastener; 92. Second fastener; 93. Third fastener; 94. Fourth fastener; 95. Fifth fastener; 96. Sixth fastener.

[0069] 10. Fastening connector; 101. First connector; 102. Second connector. [Detailed Implementation]

[0070] To make the technical solution and beneficial effects of this application more apparent and understandable, a detailed description is provided below by listing specific embodiments. Unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application pertains.

[0071] 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," 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 application and simplifying the description, and are not intended to indicate or imply that the device 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.

[0072] In the embodiments of the power tool 100 of this application, the power tool 100 may be a power tool such as an electric drill, electric wrench, electric hammer, electric pick, reciprocating saw, screwdriver, electric shears, polishing machine, electric chainsaw, grinder, etc. Of course, it may also be other power tools, which will not be listed here.

[0073] See Figures 1-3 As shown, the power tool 100 disclosed in this application may include a housing 1 forming its external outline, an output shaft 2 rotatably supported on the housing 1 and protruding from one end of the housing 1, and a motor 3 and a transmission mechanism housed inside the housing 1. The transmission mechanism may include a reduction assembly 4 composed of a gear train and an impact assembly 5 composed of a striking block and a spring. The transmission mechanism may also include either the reduction assembly 4 or the impact assembly 5 alone. Of course, the transmission mechanism may also be other types of transmission components for transmitting power from the motor 3 to the output shaft 2. The housing 1 may include a main housing 11 extending in the front-rear direction and a handle housing 12 connected to the main housing 11.

[0074] To facilitate a clear explanation of the specific content of the technical solution of this application, the following definitions are made: the central axis of the output shaft 2 and the direction parallel to it are defined as axial; the radial direction of the circumference with the central axis of the output shaft 2 as the central axis is defined as radial; the output direction of the output shaft 2 is defined as forward; the direction opposite to the output direction of the output shaft 2 is defined as rearward; the direction from the main housing 11 toward the handle housing 12 is defined as downward; and the direction from the handle housing 12 toward the main housing 11 is defined as upward.

[0075] See Figure 1The main housing 11 is cylindrical and extends in the front-to-back direction. The main housing 11 includes an output housing 111, a gearbox housing 112, a motor housing 113, and a rear cover 114 arranged in a straight line from front to back. The output housing 111 supports the output shaft 2 and houses the impact assembly 5. The gearbox housing 112 houses the reduction assembly. The motor housing 113 houses the motor 3. The rear cover 114 closes the opening at the rear end of the motor housing 113. The front end of the rotor shaft of the motor 3 is rotatably supported on the gearbox housing 112 via a front bearing 31, and the rear end is rotatably supported in the cavity formed by the rear cover 114 via a rear bearing 32. A support bearing 21 is sleeved on the outer periphery of the output shaft 2. The outer ring of the support bearing 21 mates with the inner wall of the output housing 111, and the inner ring mates with the output shaft 2, thereby rotatably supporting the output shaft 2 on the output housing 111.

[0076] See Figure 4 The output housing 111, gearbox housing 112, and motor housing 113 are connected by fastening connectors 10 arranged in the front-rear direction. The fastening connectors 10 include a first connector 101 integrally formed in the motor housing 113 and a second connector 102 that passes through the motor housing 113 and gearbox housing 112 in sequence and is detachably connected to the first connector 101.

[0077] In some embodiments, the first connector 101 may be specifically implemented as a fastening nut embedded in the motor housing 113, the front end of the first connector 101 being open and having an internal thread, and the second connector 102 may be specifically implemented as a fastening bolt extending in the front-rear direction, the fastening bolt passing through the output housing 111 and the gearbox housing 112 and finally threadedly connected to the first connector 101.

[0078] See Figure 4 The motor housing 113 has a first main body portion 113a for accommodating the motor 3 and a first connecting portion 113b extending radially outward from the outer peripheral surface of the first main body portion 113a. The first connecting portion 113b has a first hole 113c with a front opening. The first connecting member 101 is formed in the first hole 113c, and the front end of the first connecting member 101 protrudes from the front end surface of the first connecting portion 113b.

[0079] The gearbox housing 112 has a second main body portion 112a for accommodating the transmission mechanism and a second connecting portion 112b extending radially outward from the outer peripheral surface of the second main body portion 112a. The second connecting portion 112b is formed with a second hole 112c extending in the front-rear direction. The front end of the first connecting member 101 is inserted into the second hole 112c.

[0080] The output housing 111 has a third main body portion 111a for rotatably supporting the output shaft and a third connecting portion 111b extending radially outward from the outer peripheral surface of the third main body portion 111a. The third connecting portion 111b forms a third hole 111c extending in the front-rear direction. The second connecting member 102 passes through the third hole 111c and the second hole 112c in sequence and is threadedly connected to the first connecting member 101.

[0081] During the use of power tools, the main housing 11 is subjected to significant shear forces. After prolonged use, the bolts will reach their fatigue limit and break, rendering the tool unusable. To address this, the front end of the first connecting member 101 can be extended forward to allow it to be inserted into the gearbox housing 112. The engagement of the front end of the first connecting member 101 with the gearbox housing 112 can also offset some of the shear forces, thereby reducing the shear forces borne by the second connecting member 102 and extending its service life.

[0082] Therefore, the second hole 112c can be configured as a stepped hole, having a first diameter adapted to the first connector 101 and a second diameter adapted to the second connector 102, wherein the second diameter is located at the front end of the first diameter, and the first diameter is larger than the second diameter. In some embodiments, the protruding length of the front end of the first connector 101 ranges from 3mm to 6mm, the gap between the outer peripheral surface of the first connector 101 and the first diameter ranges from 0.05mm to 0.1mm, and the gap between the outer peripheral surface of the second connector 102 and the second diameter ranges from 0.3mm to 0.5mm. This configuration allows the first connector 101 to bear the shear force before the second connector 102, thereby further protecting the second connector 102 and preventing it from breaking.

[0083] Of course, in some embodiments, the gearbox housing 112 is built into the output housing 111 or the motor housing 113, so that only the motor housing 113 and the output housing 111 are distributed along the front-back direction in the main housing 11 of the housing 1. Therefore, in order to prevent the second connecting member 102 from being broken, as described above, the front end of the first connecting member 101 integrally formed in the motor housing 113 can be inserted into the output housing 111, so that the first connecting member 101 can also bear a certain shear force, thereby protecting the second connecting member 102 and preventing it from breaking.

[0084] See Figure 4 , Figure 12The aforementioned motor housing 113 is used to house the motor 3, which can be specifically implemented as a brushless motor. The diameter D1 of the brushless motor ranges from 60 to 75 mm. The aforementioned battery pack 6 can provide power to the brushless motor so that it can rotate. In the embodiments of this application, the length L1 from the rear end of the aforementioned motor 3 to the front end of the aforementioned output shaft 2 can range from 230 to 240 mm.

[0085] The gearbox housing 112 is used to house the transmission mechanism, and its diameter D2 ranges from 65 to 68 mm. In the embodiment of this application, after being driven by the motor 3 with the above-mentioned dimensional parameters, the transmission mechanism transmits the power of the motor 3 to the output shaft 2, and the output torque that it can generate externally ranges from 1900 to 2100 N.M. The length L2 of the support bearing 21 used to support the output shaft 2 ranges from 23.2 to 25.2 mm. The length L3 of the impact block in the impact assembly ranges from 47.5 to 49 mm. A fan is also connected to the rear of the motor 3, and the projection of the fan and the rear bearing 32 on a plane parallel to the central axis of the output shaft at least partially overlaps, with the length L4 of the overlapping portion ranging from 2 to 3.5 mm. Furthermore, the length L5 of the front bearing 31 and the rear bearing 32 used to support the motor 3, from the front end face of the front bearing 31 to the rear end face of the rear bearing 32, ranges from 67.5 to 69 mm.

[0086] This configuration allows for the output of sufficient operating torque to meet work requirements, provided that the motor and transmission mechanism are of a certain size.

[0087] See Figure 1 The handle housing 12 is connected to the outer periphery of the main housing 11 and can be generally D-shaped. The handle housing 12 has a grip portion 121 for the operator to hold, and a protective portion 122 located in front of the grip portion 121. The protective portion 122 serves both to protect the user and to assist in gripping. A battery pack 6 is inserted into the lower part of the handle housing 12 to provide power to the power tool 100.

[0088] See Figure 4 The handle housing 12 has a semi-shell structure, which can be formed by two identical and symmetrical first semi-shells 12a and second semi-shells 12b. The first semi-shells 12a and second semi-shells 12b hold the main housing 11 in the middle and are fastened together by bolts.

[0089] The grip portion 121 extends downward in a generally vertical direction, forming a gripping space for the user to hold the hand together with the front protective portion 122. The trigger switch is also located in this gripping space.

[0090] The protective section 122 is divided into an upper connecting section 122a, an arc transition section 122b, a lower extension section 122c, and a lower connecting section 122d, which are connected to the grip section 121. A first mounting position 122e for mounting the lighting component 7 may be provided in the arc transition section 122b, and a second mounting position 122f for mounting the display component 8 may be provided in the converging section 122d.

[0091] See Figure 3 The power tool 100 also includes a fastening assembly 9 for securing the first half-shell 12a and the second half-shell 12b together. The fastening assembly 9 may be implemented as a screw, bolt, or other detachable connection structure. The fastening assembly 9 includes a fastener 9a and a connecting post 9b formed on the inner wall of the handle housing 12.

[0092] The protective part 122 may be provided with a first fastener 91 adjacent to the first mounting position 122e, a second fastener 92 located between the first mounting position 122e and the second mounting position 122f, and a third fastener 93 adjacent to the second mounting position 122f.

[0093] In some embodiments of this application, to avoid interference from the fastening component 9 with other components, such as the display component 8, the length extension direction of the display component 8, the length extension direction of the lower extension segment 122c, and the line connecting the second fastener 92 and the third fastener 93 can be arranged parallel to each other. This ensures that the area where the display component 8 is installed is large enough to increase the area occupied by the display component 8, while also ensuring that the handle housing 12 can be completely closed. Furthermore, to further optimize the layout of the fastening components adjacent to the display component 8, the ratio between the distance between the second fastener 92 and the third fastener 93 and the length of the display component 8 can be in the range of 1.1-1.3.

[0094] See Figure 6 Inside the protective section 122, a lead wire groove 122g may be provided to accommodate the wires connected to the lighting component 7 and the display component 8. The connecting post for connecting to the second fastener 92 and the third fastener 93 is also provided near the lead wire groove 122g. To prevent the connecting post from obstructing the routing of the wires, a clearance notch may be provided on the outer peripheral surface of the connecting post facing the lead wire groove.

[0095] See Figure 3Furthermore, a fourth fastener 94 can be provided at the connection between the main housing 11 and the handle housing 12 of the power tool 100, a fifth fastener 95 can be provided on the grip portion 121, and a sixth fastener 96 can be provided near the battery pack 6. Through the uniform layout of the above fasteners, the first half-shell 12a and the second half-shell 12b of the handle housing 12 can be fastened together as one piece, so as to avoid gaps in the handle housing 12, which would allow dust to enter the power tool 100 or grease to leak from inside the power tool 100.

[0096] See Figure 4 The lighting assembly 7 includes a light-emitting element 71 and a light-transmitting element 72 disposed in front of the light-emitting element 71. The first half-shell 12a and the second half-shell 12b of the handle housing 12 have two slots extending in the left-right direction on their opposite end faces. The light-transmitting element 72 is inserted into the front slot, and the light-emitting element 71 is inserted into the rear slot, held and fixed by the first half-shell 12a and the second half-shell 12b. The first half-shell 12a and the second half-shell 12b have openings on their opposite end faces communicating with each other. These openings accommodate the light-transmitting element 72, allowing light from the light-emitting element 71 to pass through and illuminate the front of the power tool 100. Furthermore, the outer surface of the protective part 122 may be covered with a rubber pad, which surrounds the light-transmitting element 72 for shock absorption and protection.

[0097] The lighting component 7 is installed on the arc transition section 122b of the protective part 122. Therefore, to ensure the smoothness and aesthetics of the outer contour of the protective part 122, and to avoid the protective part 122 being too large and making the whole machine appear bulky, the outer contour of the light-transmitting component 72 is set to match the outer contour of the arc transition section 122b of the protective part 122, so that the curvature angle of the light-transmitting component 72 matches the curvature angle of the arc transition section 122b. The light-transmitting component 72 can be specifically implemented as a transparent lampshade, and the light source emitted by the light-emitting component 71 is refracted by the light-transmitting component 72 and shines into the working space of the power tool 100.

[0098] See Figure 4The light-emitting element 71 includes a circuit board 711 connected to the protective part 122 and a plurality of light sources 712 embedded in the front end face of the circuit board 711. In some embodiments, the light-emitting element 71 may include four light sources 712, which are arranged in a square path, and the light sources 712 at the same horizontal height can be combined in pairs to form a first light-emitting array and a second light-emitting array. The light generated by the first light-emitting array is refracted by the light-transmitting element 72 to form an illumination arc with a central angle of α, and the light generated by the second light-emitting array is refracted by the light-transmitting element 72 to form an illumination arc with a central angle of β, wherein the angle value of α ranges from 60° to 75°, and the angle value of β ranges from 35° to 45°. Furthermore, the light generated by the first light-emitting array and the second light-emitting array, after being refracted by the light-transmitting element 72, will also produce an overlapping illumination area, which is an illumination arc with a central angle of γ, and the angle value of γ ranges from 34° to 43°. The illumination brightness of the aforementioned lighting component 7 when illuminating the workspace of the power tool 100 ranges from 20.7 to 22.3 lux.

[0099] In the aforementioned lighting assembly 7, to ensure the smoothness and aesthetics of the outer contour of the protective part 122, the light-transmitting element 72 is configured to have a certain bending angle so that light can be refracted through the light-transmitting element 72. In addition, the power tool 100 of this application also arranges four light sources 712 to form a first light-emitting array and a second light-emitting array. These two light-emitting arrays make the light emitted by the four light sources 712 refracted through the bent light-transmitting element 72, which not only expands the illumination range, but also makes the overlapping area of ​​the two light-emitting arrays the core processing area, which has higher illumination brightness.

[0100] See Figure 7-9 The display component 8 includes a cover 81 connected to the housing 1, a control board 82 housed within the cover 81, an operable operating element 83 mounted on the cover 81, a display interface 84 covering the control board 82, and a switch 85.

[0101] See Figure 6 The first half-shell 12a and the second half-shell 12b of the handle housing 12 clamp the aforementioned protective cover 81 for fixation. The protective cover 81 is made of transparent material, and the lower end face of the protective cover 81 is open and has a cavity in which the control plate 82 is housed.

[0102] The control board 82 can be specifically implemented as a control circuit board, which is fastened to the cover 81 by screws. The control board 82 has a first side 821 and a second side 822 that are parallel to each other, and the width of the first side 821 is smaller than the width of the second side 822. The control board 82 has a first through hole 823 and a second through hole 824 near the second side 822, and an arc-shaped through groove 825 near the first side 821. The cover 81 is provided with a first mounting post 811, a second mounting post 812, and a third mounting post 813 that correspond one-to-one with the first through hole 823, the second through hole 824, and the arc-shaped through groove 825, so that the cover 81 and the control board 82 are fixedly connected as a whole by screws.

[0103] The display interface 84 can be specifically implemented as a display screen, which covers the control board 82 and is connected to its internal circuitry. The display interface 84 has a first end 841 and a second end 842 that are parallel to each other, and the width of the first end 841 is smaller than the width of the second end 842. The first end 841 is located on the first side 821, and the second end 842 is located adjacent to the second side 822.

[0104] See Figure 7 The protective cover 81, control board 82, and display interface 84 have roughly the same shape, all being narrower at the top and wider at the bottom. The control board 82 can be divided into a straight edge portion 82a in the lower half and a narrowing portion 82b in the upper half, which gradually decreases in width. The display interface 84 partially covers the straight edge portion 82a and partially covers the narrowing portion 82b. The first through hole 823 and the second through hole 824 are located in the straight edge portion 82a, while the arc-shaped through groove 825 is located in the narrowing portion 82b. This arrangement is to maximize the space utilization of the control board 82 and the display interface 84, thereby maximizing the area of ​​the display interface 84 within the limited space of the protective cover 81, making it easier for the user to observe the content of the display interface 84.

[0105] The switch 85 can be specifically implemented as a push-button switch, which covers the control board 82 and is connected to its internal circuitry. The switch 85 is positioned adjacent to the second side 822 of the control board 82. In some embodiments, the display component 8 may include two switches 85, and the line connecting the two switches 85 is parallel to the second side 822. This arrangement also improves the space utilization of the control board 82.

[0106] The operating element 83 can be specifically implemented as a flexible keycap. A mounting hole 814 can be opened on the end face of the cover 81. The operating element 83 can be movably embedded in the mounting hole 814. The operating element 83 is located on the trigger path of the switch 85. When the operating element 83 is pressed down, the switch 85 can be triggered. When the user removes the force on the operating element 83, the switch 85 will cause the operating element 83 to spring back.

[0107] The surface of the cover 81 is also covered with an indicator layer 86, which can be implemented as a sticker to guide the user. It has a window to avoid the aforementioned display interface 84 and also a resilient pressing area to cover the operating element 83. Since the operating element 83 is movable, the pressing area of ​​the indicator layer 86 has a cavity. If the operating element 83 is too close to the edge of the cover 81, causing the pressing area of ​​the indicator layer 86 to extend beyond the edge of the cover 81 and become suspended, dust will inevitably enter the pressing area.

[0108] Therefore, without affecting the triggering of the switch 85, the operating member 83 can be offset towards the center of the protective cover 81. That is, the distance between the central axis of the operating member 83 and the second side 822 is greater than the distance between the central axis of the switch 85 and the second side 822. This setting not only does not affect the triggering of the switch 85, but also prevents the pressing area of ​​the indicator layer 86 from being suspended, ensuring that the edge of the indicator layer 86 is aligned with the edge of the protective cover 81, and also increasing the space utilization of the control board 82. In some embodiments, the distance between the central axis of the operating member 83 and the central axis of the switch 85 ranges from 0.2mm to 3mm; of course, the distance between them can be adjusted according to actual conditions.

[0109] It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations included in the claims. Various modifications and changes can be made to the above embodiments without departing from the scope of this disclosure. Similarly, the various technical features of the above embodiments can be arbitrarily combined to form other embodiments of this application that may not be explicitly described. Therefore, the above embodiments only illustrate several implementations of this application and do not limit the scope of protection of this patent application.

Claims

1. A power tool, characterized in that, include: The housing includes a motor housing, a gearbox housing, and an output housing distributed along the front-to-back direction; An electric motor, housed in the motor housing, is used to provide power to the power tool; An output shaft, which is rotatably supported by the output housing, is used for external output operations; A transmission mechanism, housed in the gearbox housing, is connected to the motor and the output shaft respectively to transmit power from the motor to the output shaft; The power tool also includes a fastening connector for connecting the output housing, gearbox housing, and motor housing. The fastening connector includes a first connector integrally formed in the motor housing and a second connector that passes through the motor housing and gearbox housing in sequence and is detachably connected to the first connector. The first connecting member has one end formed in the motor housing and the other end extending forward and at least partially inserted into the gearbox housing.

2. The power tool of claim 1, wherein: The first connecting member is a fastening nut, which is integrally injection molded into the motor housing, and the front end of the first connecting member is open.

3. The power tool of claim 2, wherein: The second connecting member is a fastening bolt, which is inserted into the output housing and gearbox housing from front to back and threaded to the first connecting member.

4. The power tool of claim 1, wherein: The motor housing has a first main body portion for accommodating the motor and a first connecting portion extending radially outward from the outer peripheral surface of the first main body portion. The first connecting portion has a first hole with a front opening. The first connecting member is formed in the first hole, and the front end of the first connecting member protrudes from the front end face of the first connecting portion.

5. The power tool of claim 4, wherein: The protruding length of the front end of the first connector ranges from 3mm to 6mm.

6. The power tool of claim 4, wherein: The gearbox housing has a second main body portion for accommodating the transmission mechanism and a second connecting portion extending radially outward from the outer peripheral surface of the second main body portion. The second connecting portion is formed with a second hole extending in a front-rear direction, and the front end of the first connecting member is inserted into the second hole.

7. The power tool of claim 6, wherein: The output housing has a third main body for rotatably supporting the output shaft and a third connecting part extending radially outward from the outer peripheral surface of the third main body. The third connecting part has a third hole extending in the front-rear direction. The second connecting member passes through the third hole and the second hole in sequence and is threaded to the first connecting member.

8. The power tool of claim 7, wherein: The second hole has a first diameter adapted to the first connector and a second diameter adapted to the second connector, the second diameter being located at the front end of the first diameter.

9. The power tool of claim 8, wherein: The gap between the outer peripheral surface of the first connector and the first diameter is in the range of 0.05mm-0.1mm.

10. The power tool of claim 8, wherein: The gap between the outer circumferential surface of the second connector and the second diameter is in the range of 0.3mm-0.5mm.

11. An electric power tool characterized by comprising: include: The housing includes a motor housing, a gearbox housing, and an output housing distributed along the front-to-back direction; An electric motor, housed in the motor housing, is used to provide power to the power tool; A transmission mechanism, housed in the gearbox housing, is connected to the motor drive. An output shaft, which is rotatably supported by the output housing, is driven by the transmission mechanism for external operation; The power tool also includes a fastening connector for connecting the output housing, gearbox housing, and motor housing. The fastening connector includes a first connector and a second connector. The first connector is integrally formed in one of the motor housing or the output housing. The second connector passes through the other one in sequence and is connected to the gearbox housing and is detachably connected to the first connector. Wherein, at least one end of the first connecting member adjacent to the gearbox housing is inserted into the gearbox housing.

12. An electric power tool characterized by comprising: include: The housing includes a motor housing and an output housing distributed along the front-to-back direction; An electric motor, housed in the motor housing, is used to provide power to the power tool; An output shaft, which is rotatably supported by the output housing, is used for external output operations; The power tool also includes a fastening connector for connecting the output housing and the motor housing. The fastening connector includes a first connector integrally formed in the motor housing and a second connector that passes through the motor housing and the output housing in sequence and is detachably connected to the first connector. The first connector has one end formed in the motor housing and the other end extending forward and at least partially inserted into the output housing.

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