Handheld power tool

Abstract

The utility model discloses a handheld power tool which comprises a circuit board assembly configured to control operation of a motor; the machine shell comprises a front cover shell, the front cover shell extends basically along the first axis, and at least part of the motor is contained in the front cover shell; the rear cover shell is installed at the end, away from the output shaft, of the front cover shell, a first bearing seat is formed or connected to the inner side face of the rear cover shell, the first bearing seat is used for supporting a bearing at the end, away from the output shaft, of the driving shaft, and a containing space is formed in the outer side face of the rear cover shell; the circuit board assembly is arranged in the accommodating space. The handheld power tool is compact in structure.

Description

Technical Field

[0001] The present application relates to a power tool, and more particularly to a handheld power tool. Background Art

[0002] An impact tool refers to a tool that can output a rotational motion at a certain impact frequency. Common impact tools include impact wrenches, impact screwdrivers, impact drills, etc. Impact wrenches are usually used for screwing bolts and nuts, etc. Impact screwdrivers are usually used for loosening or tightening screws, etc. Impact drills are usually used for impact drilling.

[0003] In order to output a rotational motion with a certain impact frequency, an impact tool usually includes an output assembly for outputting a rotational force and an impact assembly for periodically impacting the output assembly. In the related art, when disassembling and installing nuts on vehicle tires or in railway construction, the impact wrenches used require a large output torque, and the corresponding impact wrenches are heavy, often exceeding 10 kg. Therefore, the overall size of the impact wrench is large, making it difficult for users to hold and operate.

[0004] This section provides background information related to the present application, and these background information are not necessarily prior art. Summary of the Utility Model

[0005] An object of the present application is to solve or at least alleviate part or all of the above problems. To this end, an object of the present application is to provide a handheld power tool with a compact structure.

[0006] To achieve the above object, the present application adopts the following technical solutions:

[0007] A handheld power tool, comprising: a motor including a drive shaft rotating about a first axis; an output shaft configured to output torque and rotating about an output axis; a circuit board assembly configured to control the operation of the motor; a housing including: a front cover housing extending substantially along the first axis, the front cover housing receiving at least part of the motor; a rear cover housing mounted to an end of the front cover housing remote from the output shaft, an inner side surface of the rear cover housing forming or connecting to a first bearing seat for supporting a bearing at an end of the drive shaft remote from the output shaft, and a receiving space formed on an outer side surface of the rear cover housing; and the circuit board assembly is disposed in the receiving space.

[0008] In some embodiments, the circuit board assembly includes a circuit board and an aluminum substrate.

[0009] In some embodiments, a fan is connected to the drive shaft of the motor, and the fan is connected to the rear end of the motor.

[0010] In some embodiments, the motor includes a stator and a rotor assembly, a drive shaft is formed or connected to the rotor assembly, and a fan is disposed between the stator and the first bearing.

[0011] In some embodiments, the circuit board assembly is disposed at the rear end of the fan.

[0012] In some embodiments, the front cover housing is cylindrical, and the rear cover housing is axially connected to the front cover housing.

[0013] In some embodiments, the rear cover housing is detachably connected to the front cover housing.

[0014] In some embodiments, heat dissipation fins protruding axially are provided on the inner side of the rear cover housing.

[0015] In some embodiments, the heat dissipation fins are arranged circumferentially.

[0016] In some embodiments, the housing further includes a second cover body, and the second cover body is connected to the rear cover housing to cover the opening of the rear cover housing.

[0017] The beneficial effect of the present application is that: the rear cover housing combines the function of the circuit board box, reduces the presence of the circuit board box, and shortens the size of the handheld power tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of an impact tool according to an embodiment of the present application;

[0019] Figure 2 is a schematic structural diagram of the impact tool according to an embodiment of the present application from another perspective;

[0020] Figure 3 is a cross-sectional view of the impact tool according to an embodiment of the present application;

[0021] Figure 4 is a schematic structural diagram of an impact tool according to another embodiment of the present application;

[0022] Figure 5 is Figure 4 a schematic structural diagram of the impact tool from another perspective in

[0023] Figure 6 is a schematic structural diagram of an impact tool according to another embodiment of the present application, wherein the extending direction of the guide rail is different;

[0024] Figure 7 is a schematic structural diagram of an impact tool according to a third embodiment of the present application;

[0025] Figure 8 is a schematic structural diagram of an impact tool according to a fourth embodiment of the present application;

[0026] Figure 9 is Figure 8 A schematic structural view of another perspective of the impact tool in

[0027] Figure 10 A schematic structural view of the impact tool of the fifth embodiment of the present application, where the first handle is in the first working position;

[0028] Figure 11 A schematic structural view of the impact tool of the fifth embodiment of the present application, where the first handle is in the second working position;

[0029] Figure 12 is Figure 10 A cross-sectional view of a partial structure in

[0030] Figure 13 is Figure 10 An exploded view of a partial structure in

[0031] Figure 14 A schematic structural view of the impact tool of the sixth embodiment of the present application,

[0032] Figure 15 is Figure 14 A schematic structural view of another perspective of the impact tool in

[0033] Figure 16 A schematic structural view of the impact tool of the seventh embodiment of the present application;

[0034] Figure 17 A schematic structural view of another impact tool of the seventh embodiment of the present application;

[0035] Figure 18 A schematic structural view of another impact tool of the seventh embodiment of the present application;

[0036] Figure 19 A schematic structural view of another second handle of the impact wrench of the present application;

[0037] Figure 20 An exploded view of another second handle of the impact wrench of the present application;

[0038] Figure 21 A cross-sectional view of another second handle of the impact wrench of the present application;

[0039] Figure 22 A schematic structural view of a third second handle of the impact wrench of the present application;

[0040] Figure 23 A cross-sectional view of a third second handle of the impact wrench of the present application;

[0041] Figure 24Cross-sectional view of a partial structure of the impact wrench of the present application;

[0042] Figure 25 Schematic diagram of the arrangement of the third and fourth fasteners of the impact wrench of the present application;

[0043] Figure 26 Schematic diagram of the rear cover housing and fins of the impact wrench of the present application;

[0044] Figure 27 Schematic diagram of a power tool combination from a perspective provided by an embodiment of the present application;

[0045] Figure 28 Schematic diagram of a power tool combination from another perspective provided by an embodiment of the present application;

[0046] Figure 29 Schematic diagram of a power tool combination provided by an embodiment of the present application, where the power tool combination does not have a protective cover;

[0047] Figure 30 Schematic diagram of a power tool combination provided by another embodiment of the present application. Detailed implementation manners

[0048] Before explaining any embodiment of the present application in detail, it should be understood that the present application is not limited to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0049] In the present application, the terms "comprising", "including", "having" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising that element.

[0050] In the present application, the term "and / or" is a correlative relationship describing associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the present application, the character " / " generally represents an "and / or" relationship between the associated objects before and after.

[0051] In this application, the terms "connected", "combined", "coupled", and "mounted" can be direct connections, combinations, couplings, or mountings, or indirect connections, combinations, couplings, or mountings. Among them, by way of example, a direct connection means that two parts or components are connected together without an intermediate member being provided therebetween, and an indirect connection means that two parts or components are each connected to at least one intermediate member, and these two parts or components are connected through the intermediate member. In addition, "connected" and "coupled" are not limited to physical or mechanical connections or couplings, and can include electrical connections or couplings.

[0052] In this application, those of ordinary skill in the art will understand that relative terms used in connection with a quantity or condition (e.g., "about", "approximately", "substantially", etc.) are intended to include the recited value and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances resulting from manufacturing, assembly, use, etc. associated with a particular value. Such terms should also be considered to disclose ranges defined by the absolute values of two endpoints. Relative terms may refer to a plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values that do not employ relative terms should also be disclosed as having tolerances. In addition, when expressing a relative angular positional relationship (e.g., substantially parallel, substantially perpendicular), "substantially" may refer to a plus or minus a certain number of degrees (e.g., 1 degree, 5 degrees, 10 degrees or more) from the indicated angle.

[0053] In this application, those of ordinary skill in the art will understand that the functions performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0054] In this application, the orientation terms such as "upper", "lower", "left", "right", "front", "rear", etc. are described based on the orientation and positional relationship shown in the drawings, and should not be construed as limiting the embodiments of this application. In addition, in the context, it should also be understood that when it is mentioned that one element is connected "above" or "below" another element, it can not only be directly connected "above" or "below" another element, but also be indirectly connected "above" or "below" another element through an intermediate element. It should also be understood that orientation terms such as upper side, lower side, left side, right side, front side, rear side, etc. not only represent the positive orientation, but can also be understood as the side orientation. For example, below can include directly below, lower left, lower right, lower front, and lower rear, etc.

[0055] In this application, the terms "controller", "processor", "central processing unit", "CPU", and "MCU" are interchangeable. When using the units "controller", "processor", "central processing unit", "CPU", or "MCU" to perform specific functions, unless otherwise specified, these functions can be performed by a single one of the above units or multiple ones of the above units.

[0056] In this application, the terms "device", "module", or "unit" can be implemented in the form of hardware or software in order to achieve specific functions.

[0057] In this application, the terms "calculate", "judge", "control", "determine", "identify", etc. refer to the operations and processes of a computer system or a similar electronic computing device (e.g., a controller, a processor, etc.).

[0058] To clearly illustrate the technical solution of this application, the upper side, the lower side, the left side, and the right side are defined in the accompanying drawings of the specification.

[0059] As Figure 1 and Figure 2 FIG. shows a hand-held power tool in the form of an impact tool or an impact wrench 100. It can be understood that in other alternative embodiments, different working attachments can be installed on the impact tool, and through these different working attachments, the impact tool can be, for example, an impact screwdriver, an impact drill, etc.

[0060] The impact wrench 100 includes a power supply. In this embodiment, the power supply is a DC power supply 30. The DC power supply is used to supply electrical energy to the impact wrench 100. The DC power supply is a battery pack, and the battery pack cooperates with a corresponding power circuit to supply power to the impact wrench 100. Those skilled in the art should understand that the power supply is not limited to the scenario of using a DC power supply, and it can also supply power to the corresponding components inside the machine through the mains power, an AC power supply, and a corresponding rectification, filtering, and voltage regulation circuit. In this embodiment, the DC power supply is a battery pack, and the battery pack 30 will be used to replace the power supply hereinafter, but it should not be regarded as a limitation to the present invention.

[0061] In this embodiment, the battery pack 30 can be a lithium battery pack, a solid-state battery pack, or a soft-pack battery pack. The battery pack includes a battery pack housing and individual battery cells inside the battery pack housing. The battery cells are rechargeable battery cells. Each battery cell has a nominal voltage between 3 volts and 5 volts. In some embodiments, the nominal voltage of a single battery pack 30 is greater than or equal to 8V and less than or equal to 48V. The battery pack can have a nominal capacity of at least 5 ampere-hours (Ah) (for example, having two strings of five series-connected battery cells ("5S2P" battery pack)) to improve the endurance. In some embodiments, the battery pack can have a nominal capacity of at least 9Ah (for example, having three strings of five series-connected battery cells ("5S3P" battery pack).

[0062] As shown Figures 1 to 3 in FIG. 1, the impact wrench 100 includes a motor 11, an output mechanism 12, an impact assembly 13, a housing 14, and a first handle 15. The motor 11 includes a drive shaft that rotates about a first axis 101. The output mechanism includes an output shaft 121 that rotates about an output axis 102, and the output shaft 121 is configured to output torque. The motor 11 is drivingly connected to the impact assembly 13, and the impact assembly 13 is configured to apply an impact force to the output shaft 121.

[0063] In this embodiment, the motor 11 is specifically configured as an electric motor. Hereinafter, the electric motor 11 will be used instead of the motor, and the motor shaft 111 will be used instead of the drive shaft, but this should not be construed as a limitation to the present application. In this embodiment, the electric motor 11 may be selected as a brushless direct current ("BLDC") motor. The electric motor 11 includes a stator 115 and a rotor 116, and the rotor 116 forms or is connected to the motor shaft 111.

[0064] A clamping assembly is provided at the front end of the output shaft 121, and can clamp corresponding working accessories when realizing different functions, such as a screwdriver, a drill bit, a socket, etc.

[0065] The output shaft 121 is configured to output torque externally to operate a fastener. The output shaft 121 rotates about the output axis 102. In this embodiment, the first axis 101 coincides with the output axis 102. In other alternative embodiments, the output axis 102 and the first axis 101 are arranged at a certain angle to each other. In other alternative embodiments, the first axis 101 and the output axis 102 are parallel to each other but do not coincide.

[0066] The impact assembly 13 is configured to apply an impact force to the output shaft 121. The impact assembly 13 includes a main shaft 131, an impact block 132 sleeved on the outer periphery of the main shaft, an anvil 133 provided at the front end of the impact block 132, and an elastic element 134. Among them, the anvil 133 is connected to the output shaft 121. In this embodiment, the anvil 133 includes an anvil seat 135, and the output shaft 121 is formed at the front end of the anvil seat 135. It can be understood that the anvil seat 135 and the output shaft 121 may be integrally formed or separate independent parts.

[0067] Continuing to refer to Figures 1 to 3 FIG. 1, the elastic element 134 provides a force for the impact block 132 to make it close to the anvil 133. In this embodiment, the elastic element 134 is a helical spring. A pair of first ball grooves that open forward and extend backward in the front-rear direction are further provided on the front end surface of the impact block 132. A pair of second ball grooves are further formed on the outer surface of the main shaft. The impact assembly 13 further includes a rolling ball. The rolling ball straddles the first ball groove and the second ball groove, so that the impact block 132 is connected to the main shaft. In this embodiment, the rolling ball is a steel ball.

[0068] The motor 11 and the impact assembly 13 are at least partially disposed in the housing 14. The housing 14 extends substantially along the direction of the first axis 101. The first handle 15 is disposed at one end of the housing 14 away from the output shaft 121. Along the direction of the first axis 101, the first handle 15 at least partially overlaps with the housing 14, and the two may be an integral structure or a split structure. The DC power supply includes at least two battery packs 30, and the DC power supply is supported by the housing 14. Along the direction of the first axis 101, the DC power supply 30 at least partially overlaps with the motor 11. In this way, the overall size of the DC power supply 30 and the motor 11 in the direction of the first axis 101 is smaller than the sum of the size of the DC power supply 30 in the direction of the first axis 101 and the size of the motor 11 in the direction of the first axis 101. Thereby, the length of the impact tool along the first axis 101 is reduced, and the structure is more compact. The first handle 15 is positioned closer to the center of gravity of the impact tool 100. This enhances the balance of the impact tool 100 when the operator grasps the first handle 15. For convenience of reference, the DC power supply includes a first battery pack 30a and a second battery pack 30b.

[0069] As Figures 2 to 3 shown, the DC power supply 30 at least partially overlaps with the stator 115 of the motor 11, so that the position of the DC power supply is set as close as possible to the first handle 15, and the center of gravity moves backward, which is convenient to adjust the alignment of the output shaft 121. Exemplarily, along the first axis 101, the first battery pack 30a and the second battery pack 30b respectively at least partially overlap with the stator 115 of the motor 11.

[0070] In this embodiment, the central axes of the motor 11 and the housing 14 extend in the same direction and are thus parallel to each other. Therefore, the motor shaft 111 of the motor 11 and the extending direction of the housing 14 are both arranged in the front-rear direction. In this embodiment, the extending direction of the housing 14 is coaxial with the central axis of the motor shaft 111, so that the impact tool 100 has an in-line configuration.

[0071] In one embodiment, the DC power supply is supported by the housing 14 and is disposed on the left side and / or the right side of the housing 14. Exemplarily, the first battery pack 30a and the second battery pack 30b are respectively disposed on the left side and the right side of the housing 14. In this embodiment, the vertical plane passing through the first axis 101 is defined as the central plane S1, and both sides of the central plane S1 are defined as the left side and the right side of the housing 14. Among them, the first battery pack 30a and the second battery pack 30b are respectively disposed on the left side and the right side of the housing 14, which is understood that the first battery pack 30a is only located on the left side or the right side of the housing 14, the second battery pack 30b is only located on the right side or the left side of the housing 14, and the first battery pack 30a and the second battery pack 30b do not straddle the left and right sides. Optionally, the first battery pack 30a and the second battery pack 30b are symmetrically supported on both sides of the housing 14 with the first axis 101 as the central axis.

[0072] The first handle 15 is generally D-shaped, and the first handle 15 is at least partially connected to the housing 14. The first handle 15 includes a surrounding finger through hole. In the present embodiment, the first handle 15 includes a first opening 152 for accommodating fingers. The first opening 152 is a receiving space that completely surrounds the fingers, that is, the first opening 152 is a closed hole. The connection between the housing 14 and the first handle 15 is a shock-absorbing connection, which is comfortable to hold. The shock-absorbing connection refers to the prior art and will not be described in detail. The first handle 15 is located behind the housing 14, allowing the user to push and pull directly relative to the impact wrench without generating rotational movement or torque between them. In the present embodiment, the first battery pack 30a and the second battery pack 30b are respectively located in front of the first handle 15. Exemplarily, the first battery pack 30a and the second battery pack 30b are respectively located at least partially in front of the first handle 15.

[0073] The impact wrench 100 further includes a power switch 18 and a switching portion 183. The power switch 18 is used to turn the motor 11 on and off. Exemplarily, the power switch 18 is used to control the power-on state of the motor 11. The switching portion 183 is disposed on the upper side of the power switch 18, and the switching portion 183 is configured to be operated to set the rotation direction of the motor 11 to a forward direction for tightening or screwing in a fastener or a reverse direction for loosening or screwing out a fastener. In this embodiment, the switching portion 183 is a switching switch. The power switch 18 is disposed on the first handle 15. Exemplarily, the power switch 18 is disposed in the accommodation space of the first opening 152. In this embodiment, the first handle 15 includes a grip portion 151, and the power switch 18 is disposed on the grip portion 151. The grip portion 151 is provided with a grip portion 1511 on the downstream side of the power switch 18, and the grip portion 1511 is configured to support at least a portion of the palm when the user operates the power switch 18 with a finger. The grip portion 1511 is provided on the downstream side of the power switch 18 along the extending direction.

[0074] like Figures 2 to 3 As shown, a fan 114 is provided at the rear side of the motor 11 for dissipating heat for the motor 11 and the impact wrench 100. The fan 114 is formed or connected to the motor shaft 111, and when the motor 11 rotates, the fan 114 rotates with the motor 11. An air inlet 143 is provided on the housing 14, so that when the fan 114 rotates, the heat dissipating air enters the interior of the housing 14 through the air inlet 143 to dissipate heat for the motor 11 and the impact wrench 100. In this embodiment, the DC power supply 30 is provided in front of the air inlet 143. Exemplarily, the DC power supply 30 is staggered with the air inlet 143 so that the DC power supply does not completely block the air inlet 143.

[0075] The housing 14 includes an output housing 141 and a motor housing 142. The output housing 141 supports the output shaft 121, and the motor 11 is at least partially supported within the motor housing 142. The output housing 141 is connected to the motor housing 142. In the present embodiment, the first handle 15 is formed or connected to the motor housing 142. It can be understood that the motor housing 142 can be formed by assembling multiple housings. In some embodiments, due to the shape or mold manufacturing reasons, the motor housing 142 is a split structure. Optionally, the motor housing 142 can be a structure composed of two parts. For example, the motor housing 142 includes a left half shell and a right half shell, or a front half shell and a rear half shell, or an upper half shell and a lower half shell that can be spliced together. Optionally, the motor housing 142 can be a structure composed of multiple parts. Exemplarily, the motor housing 142 is made of plastic material. In the present embodiment, the output housing 141 can be an integral structure or a split structure. Optionally, the output housing 141 at least includes a front housing 141a disposed around the output shaft 121, and the front housing 141a at least supports the bearing or bushing outside the output shaft 121. In the present embodiment, the front housing 141a is made of metal material. To ensure the connection between the output housing 141 and the motor housing 142, the output housing 141 includes a left half shell and a right half shell, or a front half shell and a rear half shell, or an upper half shell and a lower half shell that can be spliced together.

[0076] Since the impact wrench 100 is relatively heavy and difficult to operate with one hand, a second handle 16 is further provided at one end of the housing 14 facing the output shaft 121. One can hold the first handle 15 and the second handle 16 with both hands respectively. Holding the first handle 15 can operate the switch of the impact tool 100 and control the commutation, and holding the second handle 16 helps to lift and carry, making it more convenient and labor-saving to use. In the present embodiment, the second handle 16 is connected to the output housing 141. In some embodiments, the second handle 16 is connected to the front housing 141a. The second handle 16 includes a grip 161 and a mounting portion 163, and the mounting portion 163 connects the second handle 16 and the housing 14. The grip 161 can be generally U-shaped or annular. In some embodiments, the grip 161 can be covered by an elastomeric overmolded part.

[0077] The second handle 16 can be pivotally connected to the housing 14 and can be adjusted between various different orientations. In one embodiment, the impact wrench 100 does not include a second handle. In some embodiments, the second handle 16 is fixedly connected to the housing 14 relatively.

[0078] The impact wrench 100 further includes a power supply mounting portion 19. The power supply mounting portion 19 is provided with a mounting groove 192 having a guide rail 191. An electrical connector is provided in the mounting groove 192, and the battery can slide into the mounting groove 192 and engage with the electrical connector. The battery pack 30 has a release button to unlock the lock that locks the battery to the battery base when the battery pack 30 is fully inserted into the guide rail 191 of the battery base. The battery pack 30 further has a power level display 193, which is exposed at the top of the impact tool 100 and faces inward when the battery pack 30 is connected to the power supply mounting portion 19. In this embodiment, the power supply mounting portion 19 is formed or connected to the housing 14. Exemplarily, the power supply mounting portion 19 is provided on the motor housing 142. The two power supply mounting portions 19 are symmetrically supported on both sides of the motor housing 142 with the first axis 101 as the central axis. The extending direction of the guide rail 191 defines the mounting direction and the positioning direction after mounting of the battery pack 30. Optionally, the guide rail of the first battery pack 30a extends along the first direction F1, and the guide rail of the second battery pack 30b extends along the second direction F2, and the first direction F1 is substantially parallel to the second direction F2.

[0079] As Figure 3 shown, the transmission mechanism 17 is disposed between the motor 11 and the impact assembly 13 for achieving power transmission between the motor shaft 111 and the main shaft. In this embodiment, the transmission mechanism 17 employs planetary gear reduction. Since the working principle of planetary gear reduction and the reduction generated by such a transmission mechanism have been fully disclosed to those skilled in the art, detailed description is omitted here for the purpose of brevity of the specification.

[0080] In this embodiment, the impact wrench 100 is a power tool with high output torque. In this embodiment, the output shaft 121 of the impact wrench 100 can output at least 1000 N•m of torque. Exemplarily, the weight of the impact wrench 100 exceeds 5 kg. Optionally, the output shaft 121 of the impact wrench 100 can output at least 1500 N•m of torque. Optionally, the output shaft 121 of the impact wrench 100 can output at least 2000 N•m of torque. Optionally, the output shaft 121 of the impact wrench 100 can output at least 2500 N•m of torque.

[0081] The above-mentioned large impact tool 100 can be used in high torque applications, such as an impact wrench 100 for heavy truck wheel fasteners for tightening and loosening heavy truck wheel fasteners. The impact wrench 100 is capable of applying a large tightening torque to the fastener. As defined herein, the term "tightening torque" refers to a torque applied to the fastener in the direction of increasing tension (i.e., in the tightening direction). In particular, the impact assembly and the transmission assembly of the impact wrench 100 convert the continuous torque input from the motor 11 to transmit a continuous rotational impact on the workpiece, thereby generating a tightening torque of at least 1500N•m when the motor 11 draws no more than 100 amperes (A). In some embodiments, the impact assembly and the transmission assembly transmit continuous rotational impact on the workpiece, thereby generating a tightening torque of at least 1500N•m when the motor 11 draws no more than 80A. In some embodiments, the impact assembly and the transmission assembly of the impact wrench 100 convert continuous torque input from the motor 11 to deliver continuous rotational impact on the workpiece, thereby generating at least 2000 N·m of tightening torque when the motor 11 draws no more than 100 amperes (A). In some embodiments, the impact assembly and the transmission assembly deliver continuous rotational impact on the workpiece, thereby generating at least 2000 N·m of tightening torque when the motor 11 draws no more than 80A. The impact assembly and the transmission assembly of the impact wrench 100 convert continuous torque input from the motor 11 to deliver continuous rotational impact on the workpiece, thereby generating at least 2500 N·m of tightening torque when the motor 11 draws no more than 100 amperes (A). In some embodiments, the impact assembly and the transmission assembly deliver continuous rotational impact on the workpiece, thereby generating at least 2500 N·m of tightening torque when the motor 11 draws no more than 80A.

[0082] In some embodiments, the weight of the impact wrench 100 exceeds 10 kg. In some embodiments, the weight of the impact wrench 100 exceeds 15 kg.

[0083] like Figures 4 to 6 An impact wrench 100B according to another embodiment is shown. The impact wrench 100B is similar to the impact wrench 100B described above with reference to Figures 1 to 3 Therefore, features and elements of the impact wrench 100B that correspond to features and elements of the impact wrench 100 are given like reference numerals followed by the letter “B.” Additionally, the following description focuses primarily on the differences between the impact wrench 100B and the impact wrench 100.

[0084] Along the direction of the first axis 101B, the DC power supply 30B' at least partially overlaps with the motor 11B. The DC power supply 30B' is supported by the housing 14B and is disposed on the lower side of the housing 14B. Exemplarily, the first battery pack 30a and the second battery pack 30b are respectively disposed on the lower side of the housing 14B. Exemplarily, the first battery pack 30a and the second battery pack 30b are respectively disposed at the bottom of the housing 14B. In this embodiment, at least one of the first battery pack 30a and the second battery pack 30b at least partially overlaps with the stator 115B of the motor 11B. In this embodiment, the first battery pack 30a and the second battery pack 30b respectively have a nominal capacity greater than or equal to 5 ampere-hours (Ah), and at least one of the first battery pack 30a and the second battery pack 30b at least partially overlaps with the stator 115B of the motor 11B.

[0085] Along the direction of the first axis 101B, the DC power supply 30B' at least partially overlaps with the first handle 15B. In this embodiment, at least a part of the first battery pack 30a or the second battery pack 30b is disposed at the bottom of the first handle 15B. The power supply mounting portions 19B are respectively disposed on the housing of the motor 11B and the lower side housing of the first handle 15B. The power supply mounting portion 19B is provided with a mounting groove 192B with a guide rail 191B, and the extending direction of the guide rail 191B defines the mounting direction and the positioning direction after mounting of the battery pack 30. Optionally, the guide rail of the first battery pack 30a extends along the first direction F1B and the guide rail of the second battery pack 30b extends along the second direction F2B. Exemplarily, the first direction F1B and the second direction F2B are substantially parallel. Exemplarily, the included angle between the first direction F1B and the second direction F2B is 0 degrees, that is to say, the first battery pack 30a and the second battery pack 30b are mounted in the same direction on the power supply mounting portion 19B. Exemplarily, the included angle between the first direction F1B and the second direction F2B is 180°, that is to say, the first battery pack 30a and the second battery pack 30b are respectively mounted on the power supply mounting portion 19B from opposite directions.

[0086] The battery pack 30 has a length direction L1, a width direction W1, and a height direction H1. The dimension of the battery pack 30 in the length direction L1 is greater than its dimension in the width direction W1 and greater than its dimension in the height direction H1. Among them, the first battery pack 30a and the second battery pack 30b are combined with the power supply mounting portion 19B along the length direction L1. Exemplarily, the length direction L1 of the first battery pack 30a and the second battery pack 30b is orthogonal to the direction of the first axis 101B. In this embodiment, the first battery pack 30a and the second battery pack 30b are combined with the power supply mounting portion 19B in the left-right direction. The first battery pack 30a and the second battery pack 30b are arranged in sequence along the width direction W1 of the battery pack 30.

[0087] As Figure 6As shown, the first battery pack 30a and the second battery pack 30b are coupled to the power supply mounting portion 19B along the length direction L1. Exemplarily, the length direction L1 of the first battery pack 30a and the second battery pack 30b is parallel to the direction of the first axis 101B. In the present embodiment, the first battery pack 30a and the second battery pack 30b are coupled to the power supply mounting portion 19B in the front-rear direction. The guide rail of the first battery pack 30a extends along the first direction F1B and the guide rail of the second battery pack 30b extends along the second direction F2B, wherein the first direction F1B coincides with the second direction F2B, that is to say, the first battery pack 30a and the second battery pack 30b are coaxially mounted. The first battery pack 30a and the second battery pack 30b are arranged in sequence along the length direction L1 of the battery pack 30. In the present embodiment, the insertion direction of the first battery pack and the insertion direction of the second battery pack form an angle of 180°.

[0088] As Figure 7 shown illustrates an impact wrench 100C according to another embodiment. The impact wrench 100C is similar to the impact wrench 100 Figures 1 to 3 described above. Accordingly, features and elements of the impact wrench 100C corresponding to the features and elements of the impact wrench 100 are given similar reference numerals followed by the letter "C". In addition, the following description focuses mainly on the differences between the impact wrench 100C and the impact wrench 100.

[0089] Along the direction of the first axis 101C, the DC power supply 30C is disposed at the rear side of the first handle 15C. Exemplarily, along the direction of the first axis 101C, the power supply mounting portion 19C is disposed at the rear side of the first handle 15C. In the present embodiment, the DC power supply 30C is supported by the first handle 15C and is disposed on the left side and / or the right side of the first handle 15C. Exemplarily, the first battery pack 30a and the second battery pack 30b are respectively disposed on the left side and the right side of the first handle 15C. Wherein, the first battery pack 30a and the second battery pack 30b are respectively disposed on the left side and the right side of the first handle 15C, which is understood that the first battery pack 30a is only located on the left side or the right side of the housing 14C, the second battery pack is only located on the right side or the left side of the housing 14C, and the first battery pack 30a and the second battery pack do not straddle the left and right sides. Optionally, the first battery pack 30a and the second battery pack 30b are symmetrically supported on both sides of the first handle 15C with the first axis 101C as the central axis.

[0090] As Figures 8 to 9 shown illustrates an impact wrench 100D according to another embodiment. The impact wrench 100D is similar to the impact wrench 100 Figures 1 to 3Therefore, features and elements of the impact wrench 100D that correspond to features and elements of the impact wrench 100 are given like reference numerals followed by the letter “D.” Additionally, the following description focuses primarily on the differences between the impact wrench 100D and the impact wrench 100.

[0091] The first handle 15D is disposed at one end of the housing 14D away from the output shaft 121D. In this embodiment, along the first axis 101D direction, the first handle 15D and the motor 11D housing at least partially overlap, so that the size of the first handle 15D and the DC power supply 30D as a whole along the first axis 101D direction is smaller than the sum of the size of the first handle 15D along the first axis 101D direction and the size of the DC power supply 30D along the first axis 101D direction. Exemplarily, the gripping portion 151D of the first handle 15D extends along the third direction F3D. Exemplarily, the gripping portion 151D of the first handle 15D is inclined from the motor housing 142D along the third direction F3D and extends upward to above the motor 11D.

[0092] In the direction of the first axis 101D, the DC power supply 30D is arranged behind the motor 11D. Exemplarily, the first battery pack 30a and the second battery pack 30b are respectively arranged behind the stator 115D. In the direction of the first axis 101D, the first handle 15D at least partially overlaps with the DC power supply 30D. Exemplarily, in the direction of the first axis 101D, the grip portion 1511D at least partially overlaps with the DC power supply 30D. To reduce the axial size of the impact tool 100D.

[0093] The DC power supply 30D is supported by the housing 14D and is disposed on the left side and / or right side of the housing 14D. Exemplarily, the first battery pack 30a and the second battery pack 30b are disposed on the left side and the right side of the housing 14D, respectively. In this embodiment, the vertical plane passing through the first axis 101D is set as the center plane S1D, and the two sides of the center plane are defined as the left side and the right side of the housing 14D. Among them, the first battery pack 30a and the second battery pack 30b are disposed on the left side and the right side of the housing 14D, respectively, which means that the first battery pack 30a is only located on the left side or the right side of the housing 14D, and the second battery pack 30b is only located on the right side or the left side of the housing 14D, and the first battery pack 30a and the second battery pack 30b do not span the left and right sides. Optionally, the first battery pack 30a and the second battery pack 30b are symmetrically supported on both sides of the housing 14D with the first axis 101D as the center axis.

[0094] In this embodiment, the DC power supply 30D is disposed at the rear side of the air inlet 143D. Exemplarily, the DC power supply 30D and the air inlet 143D are staggered so that the DC power supply 30D does not completely block the air inlet 143D.

[0095] In this embodiment, the power supply mounting portion 19D is formed on or connected to the housing 14D. Exemplarily, the power supply mounting portion 19D is provided on the motor housing 142D. The two power supply mounting portions 19D are symmetrically supported on both sides of the motor housing 142D with the first axis 101D as the central axis. The extending direction of the guide rail 191D defines the mounting direction and the positioning direction of the battery pack 30 after installation. Optionally, the guide rail 191D of the first battery pack 30a extends along the first direction F1D and the guide rail 191D of the second battery pack 30b extends along the second direction F2D. The first direction F1D intersects with the second direction F2D, that is to say, the first direction F1D and the second direction F2D are V-shaped oriented relative to each other, and the top of the guide rail 191D is spaced farther from each other than the bottom of the guide rail 191D. To reduce the radial dimension of the impact tool 100D. In this embodiment, as Figure 9 shown, when the impact wrench 100D makes a front projection along the first axis 101D, the motor 11D and the DC power supply 30 overlap radially. In the up and down direction, the lower part of the DC power supply 30 does not exceed the contour of the output housing 141D.

[0096] As Figures 10 to 13 shown, an impact wrench 100E according to another embodiment is shown. The impact wrench 100E is similar to the impact wrench 100 described above with reference to Figures 1 to 3 Therefore, the features and elements of the impact wrench 100E corresponding to the features and elements of the impact wrench 100 are given similar reference numerals followed by the letter "E". In addition, the following description mainly focuses on the differences between the impact wrench 100E and the impact wrench 100.

[0097] In this embodiment, along the direction of the first axis 101E, the DC power supply 30E is arranged between the first handle 15E and the output shaft 121E; the first handle 15E is rotatably connected to the housing 14E around the handle axis 104E. The first handle 15E is provided with a first opening 152E for receiving fingers, and the opening direction of the first opening 152E is parallel to the direction of the handle axis 104E.

[0098] The first handle 15E has a plurality of adjustable working positions around the handle axis 104E, such as Figure 10 the first working position described above, and as Figure 11 shown, the second working position. When the first handle 15E is in any one of the working positions, the first handle 15E can be held in the selected working position so that the user can hold the first handle 15E to operate the impact wrench 100E. In this embodiment, the handle axis 104E is orthogonal to the first axis 101E. Exemplarily, the first opening 152E is provided in the left and right direction of the first handle 15E, and the handle axis 104E extends in the left and right direction. Exemplarily, the first opening 152E is provided in the up and down direction of the first handle 15E, and the handle axis 104E extends in the up and down direction.

[0099] As shown Figures 12 to 13 in the figure, the first handle 15E includes a housing assembly 153E and an adjustment assembly 154E. The housing assembly 153E is in the form of a left half-shell and a right half-shell, and includes a first housing 1531E and a second housing 1532E. The first housing 1531E and the second housing 1532E are joined together to form an accommodation space, and the adjustment assembly 154E is at least partially located in the accommodation space. The first handle 15E is rotatably connected to the motor housing 142E, and the motor housing 142E is in the form of a left half-shell and a right half-shell, and includes a first motor housing 143E and a second motor housing 144E. The adjustment assembly 154E connects the first handle 15E and the motor housing 142E.

[0100] The adjustment assembly 154E includes an operating member 1541E, a limiting member 1542E, and a rotating shaft member 1543E. Among them, the operating member 1541E is at least partially disposed outside the first handle 15E and the motor housing 142E. The operating member 1541E is used to be triggered by the user to adjust the angle of the first handle 15E. The rotating shaft member 1543E connects the first handle 15E and the motor housing 142E. In this embodiment, the rotating shaft member 1543E sequentially passes through the first housing 1531E, the first motor housing 143E, the second motor housing 144E, and the second housing 1532E. The handle axis 104E is the center line of the rotating shaft member 1543E. In this embodiment, the rotating shaft member 1543E is composed of two parts on the left and right. The rotating shaft member 1543E includes a first rotating shaft 1544E and a second rotating shaft 1545E. The limiting member 1542E is used to hold the first handle 15E in a selected working position. The limiting member 1542E includes a tooth portion 1546E arranged circumferentially around the handle axis 104E, and a mating tooth that meshes with the tooth portion 1546E of the limiting member 1542E. Among them, the limiting member 1542E meshes with both the first handle 15E and the motor housing 142E at the same time. The inner side wall of the first housing 1531E is provided with a first mating tooth 1547E that meshes with the tooth portion 1546E of the limiting member 1542E, and the first motor housing 143E is provided with a second mating tooth 1548E that meshes with the tooth portion 1546E of the limiting member 1542E.

[0101] When the user needs to adjust the first handle 15E from the first working position as shown Figure 10 in the figure to the position as shown Figure 11The second working position shown can be understood as follows. When the user needs to adjust the relative position between the first handle 15E and the motor housing 142E, i.e., the working position, the user triggers the operating member 1541E to disengage the tooth portion 1546E of the limiting member 1542E from the first mating tooth 1547E. The tooth portion 1546E of the limiting member 1542E only engages with the second mating tooth 1548E. The first handle 15E rotates around the handle axis 104E to the required working position as needed. The limiting member 1542E resets to engage the tooth portion 1546E with the first mating tooth 1547E and the tooth portion 1546E with the second mating tooth 1548E, and the position of the first handle 15E relative to the motor housing 142E is maintained at the required working position. In this embodiment, the limiting member 1542E consists of two left and right parts. Therefore, the first limiting member 1542E engages with the first mating tooth 1547E and the second mating tooth 1548E respectively, and the second limiting member 1542E engages with the third mating tooth on the second motor housing 144E and the fourth mating tooth on the second housing 1532E respectively.

[0102] In this embodiment, the operating member 1541E and the limiting member 1542E are formed or connected to the rotating shaft member 1543E. Among them, the limiting member 1542E is arranged circumferentially along the rotating shaft member 1543E, and the operating member 1541E is arranged on the outer surface of the rotating shaft member 1543E. Optionally, the adjusting assembly 154E further includes a reset member 155E for driving the tooth portion 1546E of the limiting member 1542E to engage with the first mating tooth 1547E and the fourth mating tooth. Among them, the reset member 155E includes a helical spring. The reset member 155E is arranged between the limiting member 1542E and the motor housing 142E. Exemplarily, a first reset member 1551E is arranged between the first limiting member 1542E and the first motor housing 143E, and a second reset member 1552E is arranged between the second limiting member 1542E and the second motor housing 144E. The first reset member 1551E and the second reset member 1552E always provide a force for the first limiting member 1542E and the second limiting member 1542E to move towards the first housing 1531E and the second housing 1532E.

[0103] It can be understood that in some embodiments, the operating member 1541E may not be provided. The user directly rotates the first handle 15E to disengage the tooth portion 1546E of the limiting member 1542E from the mating tooth limit. When rotated to a certain angle, the tooth portion 1546E of the limiting member 1542E engages with the mating tooth limit again, locking the position of the first handle 15E relative to the motor housing 142E.

[0104] As Figures 14 to 15 shown is an impact wrench 100F according to another embodiment. The impact wrench 100F is similar to the above reference Figures 1 to 3The impact wrench 100 described above. Accordingly, features and elements of the impact wrench 100F corresponding to the features and elements of the impact wrench 100 are given similar reference numerals followed by the letter "F". Additionally, the following description focuses mainly on the differences between the impact wrench 100F and the impact wrench 100.

[0105] In the present embodiment, the first handle 15F is disposed at one end of the housing 14F away from the output shaft 121F along the direction of the first axis 101F, and the first handle 15F at least surrounds the left, upper, and right sides of the outer periphery of the housing 14F. The second handle 16F is connected to the output housing 141F, and the second handle 16F at least surrounds the left, upper, and right sides of the outer periphery of the housing 14F. The third handle 155F extends along the first axis 101F and connects the first handle 15F and the second handle 16F.

[0106] The first handle 15F and the second handle 16F form a ring-shaped handle, and the bottoms of the first handle 15F and the second handle 16F respectively form a first support 156F and a second support 157F. The first support 156F and the second support 157F protrude from the bottom surface of the housing 14F or are flush with the bottom surface of the housing 14F. When the impact wrench 100 is placed on the ground, the first support 156F and the second support 157F together form a bracket that can support the impact wrench 100.

[0107] The first handle 15F and the second handle 16F are arranged in the front-rear direction and surround the left, upper, and right sides of the outer periphery of the housing 14F. A front projection is made of the first handle 15F and the second handle 16F along the first axis 101F, and the first handle 15F and the second handle 16F substantially completely overlap. The first handle 15F and the second handle 16F serve as supports, enabling the impact wrench 100F to be placed sideways when on the ground. They can also protect the impact wrench 100F and the DC power supply 30 when the impact wrench 100F drops.

[0108] The first handle 15F, the second handle 16F, and the third handle 155F provide the user with more comfortable alternative gripping positions, and the first handle 15F, the second handle 16F, and the third handle 155F are respectively provided with curved gripping portions 151F.

[0109] As Figures 16 to 18 shown is an impact wrench 100G according to another embodiment. The impact wrench 100G is similar to the impact wrench 100 described above Figures 1 to 3 The impact wrench 100 described above. Accordingly, features and elements of the impact wrench 100G corresponding to the features and elements of the impact wrench 100 are given similar reference numerals followed by the letter "G". Additionally, the following description focuses mainly on the differences between the impact wrench 100G and the impact wrench 100.

[0110] In this embodiment, the first handle 15G includes a connecting portion 158G and a gripping portion 151G extending along a third direction F3G. One end of the gripping portion 151G is connected to the housing 14G through the connecting portion 158G, and the other end is a free end.

[0111] The first handle 15G is provided with a power switch 18G for turning on and off the motor; the switch is arranged on the gripping portion 151G.

[0112] In some embodiments, as Figure 16 shown, the third direction F3G intersects with the direction of the first axis 101G. The first handle 15G includes a first opening 152G for receiving fingers and a second opening 159G for separating the first handle and the housing. As Figure 16 shown, the opening direction X of the second opening 159G intersects with the opening direction of the first opening 152G. It can be understood that the opening direction of the first opening 152G is perpendicular to the paper plane. In some embodiments, the opening direction of the second opening 159G is perpendicular to the opening direction of the first opening.

[0113] In some embodiments, as Figure 17 shown, the connecting portion 158G' is connected to the motor housing 142G, and the connecting portion 158G' extends along the first axis 101G towards the rear of the motor housing 142G. The gripping portion 151G' extends along the third direction F3G on both sides of the connecting portion 158G'. The third direction F3G intersects with the direction of the first axis 101G. Exemplarily, the third direction F3G is orthogonal to the first axis 101G. The gripping portion 151G' extends on the left and right sides of the connecting portion 158G'. The power switch 18G is arranged on the left or right gripping portion 151G'. Exemplarily, the first handle 15G is in a T shape with a horizontally extended gripping portion 151G' for convenient two-handed gripping. After the horizontally extended gripping portion 151G' is disassembled, it forms a straight handle, or after one of the horizontally extended gripping portions 151G' is disassembled, it forms an L-shaped handle, or the first handle 15G is rotated by 90° so that the horizontal gripping portion 151G' faces downwards or upwards to make the shape of the impact tool 100G smaller.

[0114] The first handle 15G further includes a telescopic mechanism that can be telescoped, or the first handle 15G includes a folding mechanism that can be folded.

[0115] In some embodiments, as Figure 18 shown, the connecting portion 158G'' is connected to the motor housing 142G, and the connecting portion 158G'' is arranged on the upper part of the motor housing 142G. The gripping portion 151G'' extends downward along the third direction F3G. The third direction F3G intersects with the direction of the first axis 101G.

[0116] As Figures 20 to 21Shown is a configuration of a second handle 16H of the impact wrench 100. Among them, the impact wrench 100 can be any one of 100, 100B, 100C, 100D, 100E, 100F, 100G. This embodiment mainly focuses on the structure of the second handle 16H.

[0117] The second handle 16H further includes a connection assembly 162H, and the connection assembly 162H connects the grip 161H and the mounting portion 163H. The connection assembly 162H includes a connection seat 1628H, a first fastener 1629H, and a second fastener 1620H. Among them, the first fastener 1629H applies a force to the mounting portion 163H to radially contract the mounting portion 163H, increasing the frictional force between the mounting portion 163H and the housing 14, and the mounting portion 163H presses against the housing 14. The mounting portion 163H is formed or connected to the connection seat 1628H, and the first fastener 1629H is mounted on the connection seat 1628H. The second fastener 1620H positionally connects the grip 161H and the connection seat 1628H. A shock pad 1625H is provided between the connection seat 1628H and the second fastener 1620H. Among them, the shock pad 1625H is provided between the grip 161H and the connection seat 1628H. Among them, the grip 161H is substantially U-shaped or semi-circular. The grip 161H includes a continuously provided grip bar 1611H and a free end 1612H for connection. The free end 1612H of the grip 161H extends into the mounting groove 1635H of the connection seat 1628H, and the shock pad 1625H is provided between the mounting groove 1635H and the free end 1612H of the grip 161H. In this embodiment, the shock pads 1625H are respectively provided on the front side and the rear side of the grip 161H to enhance the shock absorption effect. When the impact assembly applies an impact force to the output shaft, the impact between the impact block and the anvil of the impact wrench will generate relatively large vibrations. The second handle 16H is mounted on the output housing 141. To ensure the shock absorption effect, on the one hand, the grip 161H and the connection seat 1628H are designed separately to disconnect the vibration transmission path for shock absorption. On the other hand, shock pads are added between the grip 161H and the connection seat 1628H to eliminate vibrations.

[0118] In this embodiment, the first fastener 1629H applies a force to the mounting portion 163H in the left-right direction to radially tighten the mounting portion 163H. Exemplarily, the first fastener 1629H is a bolt. The first fasteners 1629H are respectively installed at the left and right ends of the mounting portion 163H, and the mounting portion 163H is radially tightened through a threaded structure, and the mounting portion 163H shrinks and presses against the output housing 141. The second fastener 1620H passes through the connecting seat 1628H and the free end 1612H of the grip 161H along the direction of the first axis 101H. Exemplarily, the second fastener 1620H is a bolt. The second fasteners 1620H are respectively installed at the two free ends 1612H of the grip 161H, and the locking connecting seat 1628H and the grip 161H are connected through a threaded structure.

[0119] In some embodiments, the first fastener 1629H and the second fastener are combined into the first fastener 1629H. In this embodiment, a fixing member 1613H is formed or connected to the free end 1612H of the grip 161H to connect the free end 1612H of the grip 161H to the connecting seat 1628H. The first fastener 1629H passes through the mounting portion 163H, the connecting seat 1628H, and the fixing member 1613H, thereby connecting the second handle 16H to the housing 14. A shock pad 1625H is disposed between the fixing member 1613H of the grip 161H and the connecting seat 1628H. Optionally, the first fastener 1629H extends in the left-right direction, and the shock pads 1625H are respectively disposed on the left and right sides of the fixing member 1613H of the grip 161H. The first fastener 1629H is a bolt, and the mounting portion 163H is radially tightened through a threaded structure, and the mounting portion 163H shrinks and presses against the output housing 141. At the same time, the connecting seat 1628H and the grip 161H are locked through a threaded structure. Exemplarily, mating stop portions are provided between the connecting seat 1628H and the fixing member 1613H, and the connecting seat 1628H and the fixing member 1613H are positioned at the mounting positions through the stop portions, and the positions of the fixing member 1613H and the grip 161H are locked by the first fastener 1629H.

[0120] As Figures 22 to 23 FIG. shows a second handle 16J according to another embodiment. The second handle 16J is similar to the second handle 16H described above with reference to Figure 20 Therefore, the features and elements of the second handle 16J corresponding to the features and elements of the second handle 16H are given similar reference numerals followed by the letter "J". In addition, the following description mainly focuses on the differences between the second handle 16J and the second handle 16H.

[0121] The second handle 16J includes a grip 161J, a connecting component 162J, and a mounting portion 163J. The connecting component 162J includes a support tube 1621J, an operating member 1622J, and a third fastener 164J. Among them, the support tube 1621J serves as the main body housing, a receiving space is provided inside the support tube 1621J, at least a part of the operating member 1622J is disposed outside the support tube 1621J, and at least a part of the third fastener 164J is disposed inside the receiving space. The grip 161J and the mounting portion 163J are respectively connected to the support tube 1621J. The third fastener 164J respectively fixes the mounting portion 163J to the casing 14 and the grip 161J to the mounting portion 163J. The third fastener 164J includes a shock pad 1625J, and the shock pad 1625J is disposed between the support tube 1621J and the grip 161J.

[0122] Exemplarily, the third fastener 164J includes a pin 1624J, a nut 1627J, and a spring 1623J. The operating member 1622J is connected to one end of the support tube 1621J, the nut 1627J is connected to the inside of the operating member 1622J, one end of the pin 1624J is connected to the inside of the support tube 1621J and penetrates through the support tube 1621J, and the other end of the pin 1624J is connected to the nut 1627J. The grip 161J is disposed inside the support tube 1621J. The support tube 1621J is provided with two slots, and both ends of the mounting portion 163J respectively pass through the two slots and are both sleeved on the pin 1624J. Both ends of the mounting portion 163J are respectively disposed on both sides of the grip 161J. Springs 1623J are respectively disposed on the left and right sides of the grip 161J, and one end of each of the two springs abuts against the grip 161J, and the other end abuts against the mounting portion 163J. A shock pad 1625J is disposed between the spring 1623J and the mounting portion 163J. Optionally, one end of the spring 1623J abuts against the grip 161J, and the other end abuts against the shock pad 1625J. In this embodiment, the shock pad 1625J is disposed around three sides of the grip 161J to better achieve the shock absorption effect. The compression spring is used to generate pressure on the spring to fix the grip 161J.

[0123] The tightening method of the mounting portion 163J is as follows: during the rotation of the operating member 1622J, the threaded pin 1624J is threadedly connected to the nut 1627J on the operating member 1622J, the operating member 1622J squeezes the mounting portion 163J inward to compress the spring 1623J, and the mounting portion 163J is subjected to the elastic force of the spring 1623J and the pressure generated by the thread rotation to achieve shrinkage and fastening. The shock pad 1625J and the spring 1623J jointly act to suppress the vibration of the grip 161J.

[0124] On the outer side of the casing 14 and the inner side of the mounting portion 163J, one of them is provided with a limiting boss 1631J, and the other is provided with a limiting groove. After the limiting boss 1631J is disposed in the limiting groove, circumferential rotation prevention between the mounting portion 163J and the casing 14 is achieved.

[0125] In some embodiments, the grip 161J is rotatably connected to the housing 14 about a fourth axis 103J, and the mounting portion 163J is positioned and connected to the housing 14. Optionally, the fourth axis 103J intersects the first axis 101J. Optionally, the fourth axis 103J is perpendicular to the first axis 101J.

[0126] As Figures 24 to 26 shown, the impact wrench 100 is a hand-held power tool, and a motor housing 142K is provided. Among them, the impact wrench 100 as a hand-held power tool can be any one of the impact wrenches 100, 100B, 100C, 100D, 100E, 100F, 100G. This embodiment mainly focuses on the structure of the motor housing 142K.

[0127] The motor housing 142K includes a front cover housing 117K and a rear cover housing 113K. The length direction of the front cover housing 117K extends substantially along the first axis 101K of the motor 11. The front cover housing 117K houses at least part of the motor 11. The rear cover housing 113K is mounted to the end of the front cover housing 117K away from the output shaft, that is, the rear cover housing 113K is mounted to the rear end of the front cover housing 117K. A first bearing seat 1132K is formed or connected to the inner side of the rear cover housing 113K. The first bearing seat 1132K is used to support the bearing at the end of the drive shaft away from the output shaft, that is, the first bearing seat 1132K is used to support the first bearing at the rear end of the motor 11. A receiving space is formed on the outer side surface of the rear cover housing.

[0128] The circuit board assembly includes a circuit board 511K and an aluminum substrate 512K. Among them, the circuit board 511K is used to control the operation of the motor 11. The circuit board assembly is disposed in the receiving space. The rear cover housing 113K also functions as a circuit board box, reducing the presence of the circuit board box and shortening the size of the impact wrench. For the impact wrench 100, the axial dimension of the impact wrench 100 is shortened. For a hand-held power tool with the circuit board disposed in the power supply mounting portion, the size of the power supply mounting portion is compacted, and the overall height dimension from the power supply mounting portion of such a hand-held power tool to the housing can be reduced.

[0129] Exemplarily, the rear cover housing 113K extends radially along the axis of the motor 11 to cover the opening at the rear end of the front cover housing 117K. The rear cover housing 113K includes an inner side and an outer side. It can be understood that the inner side of the rear cover housing 113K is the side closer to the opposite side of the opening of the front cover housing 117K. Since the rear cover housing 113K is mounted to the rear end of the front cover housing 117K, the first bearing is the rear bearing of the motor 11 and is used to support the rotational movement at the rear end of the motor 11. The circuit board 511K is fixed on the aluminum substrate 512K, and the two are connected together on the outer side of the rear cover housing 113K. In this embodiment, a second cover body (not shown) is further connected to the rear end of the rear cover housing 113K to cover the opening on the outer side of the rear cover housing 113K, so that the rear cover housing 113K forms a complete outer shape.

[0130] The motor 11 includes a fan 114K, a stator 115BK, and a rotor assembly 116K. During assembly, the stator 115BK is assembled inside the front cover housing 117K and axially connected by a third fastener 118K. The inner wall of the front cover housing 117K forms a first support position to achieve circumferential support for the stator 115BK. The rotor assembly 116K passes through the stator 115BK, and the rotor shaft of the rotor assembly 116K is connected to the rear cover housing 113K through the first bearing. The rear cover housing 113K and the front cover housing 117K are connected by a fourth fastener 119K, and the third fastener 118K and the fourth fastener 119K are arranged staggeredly in the circumferential direction. The front cover housing 117K and the rear cover housing 113K are connected by bolts.

[0131] The fan 114K is connected to the inner side of the rear cover housing 113K, on the front side of the first bearing. The circuit board 511K and the aluminum substrate 512K are connected together on the outer side of the rear cover housing 113K. Heat dissipation bosses or fins 1131K are provided inside the rear cover housing 113K. When the fan 114K dissipates heat from the heat-conductive rear cover housing 113K, it indirectly dissipates heat from the circuit board 511K.

[0132] A gearbox is usually provided between the motor 11 and the impact assembly 13. A second support position is provided on the side of the front cover housing 117K facing away from the rear cover housing 113K. The front cover housing 117K and the second support position are connected by bolts or integrally formed. The second support position is used to connect the internal gear ring in the gearbox, etc.

[0133] As Figure 27 shown, there is a power tool combination and an auxiliary device. Among them, the power tool can be any one of the impact wrenches 100, 100B, 100C, 100D, 100E, 100F, 100G. This embodiment mainly focuses on the structure of the power tool combination and an auxiliary device.

[0134] This embodiment provides a power tool combination, as Figures 27 to 30As shown, it includes power tools such as impact wrenches 100, 100B, 100C, 100D, 100E, 100F, 100G, an auxiliary device 200, and a power supply 300. For the convenience of reference below, the power tool is, for example, an impact wrench 100.

[0135] The power supply 300 supplies power to at least one of the impact wrench 100 and the auxiliary device 200. In this embodiment, the power supply 300 is a DC power supply. Optionally, the DC power supply is a battery pack 30, and the battery pack 30 cooperates with a corresponding power circuit to supply power to the electrical components in the power tool combination. Those skilled in the art should understand that the power supply is not limited to the scenario of using the battery pack 30, and it can also be powered by mains electricity, an AC power supply, or a mixture of mains electricity and the battery pack 30, and cooperate with corresponding rectification, filtering, and voltage regulation circuits to supply power to each circuit component.

[0136] In this embodiment, the impact wrench 100 is a handheld power tool. Optionally, the handheld power tool is a high-output torque power tool. Optionally, the output shaft 121J of the high-output torque impact wrench 100 can output at least 1500 N•m of torque to complete the preset work of the impact wrench 100, such as disassembling and installing fasteners, etc. Among them, the structure of the impact wrench 100 has been revealed above and will not be elaborated here.

[0137] As Figures 27 to 29 shown, the auxiliary device 200 includes a robotic arm 21 and a traveling mechanism 22. The robotic arm 21 is connected to the impact wrench 100, and the robotic arm 21 is configured to adjust the impact wrench 100 to a preset position. The robotic arm 21 is supported by the traveling mechanism 22.

[0138] Since the weight of a high-output torque power tool is very large, especially for a handheld power tool such as the impact wrench 100, it is necessary to move the impact wrench 100 near the workpiece during work to complete the work, and it is time-consuming and laborious to carry the power tool. Coupling the impact wrench 100 to the auxiliary device 200, the traveling mechanism 22 can move the impact wrench 100 to the target position approximately, without manual handling and lifting, realizing the rapid movement of the impact wrench 100. The robotic arm 21 can adjust the impact wrench 100 to a preset position to align with the workpiece and disassemble and install the fasteners on the workpiece. With the support and adjustment of the traveling mechanism 22 and the robotic arm 21 for the impact wrench 100 to align, the operation difficulty is reduced, the work burden of the staff is alleviated, and thus the work efficiency is also improved.

[0139] Therefore, in some embodiments, the power tool can also be other handheld power tools with a weight exceeding 5 kg. For example, hair dryers, blowers and suction machines, pneumatic wrenches, angle drills, work lights, etc.

[0140] The robotic arm 21 includes a first moving component 211 and a second moving component 212 which are connected to each other. One of the first moving component 211 and the second moving component 212 is supported by the traveling mechanism 22, and the output end of the other is connected to the impact wrench 100. In this embodiment, the first moving component 211 drives the impact wrench 100 to move, and the second moving component 212 at least drives the impact wrench 100 to rotate. The robotic arm 21 has multiple degrees of freedom, thereby improving the flexibility of the impact wrench 100 connected to the execution end of the robotic arm 21, facilitating the operator to operate to align the impact wrench 100 with the fastener. In one embodiment, the first moving component 211 is supported by the traveling mechanism 22, the second moving component 212 is connected to the output end of the first moving component 211, the impact wrench 100 is connected to the output end of the second moving component 212, the first moving component 211 drives the second moving component 212 and the impact wrench 100 to move, and the second moving component 212 drives the impact wrench 100 to rotate. In another embodiment, the second moving component 212 is supported by the traveling mechanism 22, the first moving component 211 is connected to the output end of the second moving component 212, the impact wrench 100 is connected to the output end of the first moving component 211, the second moving component 212 drives the first moving component 211 and the impact wrench 100 to rotate, and the first moving component 211 drives the impact wrench 100 to move.

[0141] In one embodiment, the first moving component 211 drives the impact wrench 100 to move up and down, and the second moving component 212 has multiple joint structures to drive the impact wrench 100 to rotate around multiple different center lines. In one embodiment, the second moving component 212 provides at least two degrees of freedom of rotational movement, such as rotating left and right around a vertical center line and rotating up and down around a horizontal center line, or rotating left and right around two vertical center lines respectively and rotating up and down around a horizontal center line.

[0142] The robotic arm 21 further includes a support frame 213. The support frame 213 is supported and connected to the traveling mechanism 22. The first moving component 211 and the second moving component 212 are connected to the support frame 213, and at least one of the first moving component 211, the second moving component 212 and the support frame 213 includes a driving motor 2111 for driving the first moving component 211 and the second moving component 212. Automatic driving is achieved by setting the driving motor 2111, reducing the workload of the staff.

[0143] In one embodiment, the first moving component 211 includes a driving motor 2111, a lead screw 2112, and a lead screw nut that cooperates with the lead screw 2112. The driving motor 2111 and the lead screw 2112 are disposed on the support frame 213. The lead screw 2112 is arranged in the vertical direction. The driving motor 2111 is drivingly connected to the lead screw 2112. The impact wrench 100 is directly or indirectly connected to the lead screw 2112 and the nut through the second moving component 212 to achieve lifting. In another embodiment, the first moving component 211 can be a linear driving structure such as a hydraulic cylinder, a pneumatic cylinder, or a linear motor 11J to achieve the lifting of the impact wrench 100.

[0144] In one embodiment, the second moving component 212 includes a support seat 2121, an elastic member 2124, a first hinge rod 2122 hinged to the support seat 2121, and a second hinge rod 2123 hinged to the first hinge rod 2122. The support seat 2121 is connected to the output end of the first moving component 211. The elastic member 2124 connects the first hinge rod 2122 and the support seat 2121. The first hinge rod 2122 rotates about the horizontal center line, and the second hinge rod 2123 rotates about the vertical center line. The impact wrench 100 is connected to the second hinge rod 2123. The first hinge rod 2122 and the second hinge rod 2123 can be manually pushed, thereby realizing the manual pushing of the impact wrench 100 to rotate. The second hinge rod 2123 is provided with a hook 214, and the impact wrench 100 is provided with a lifting ring 17. The lifting ring 17 is hung on the hook 214, which facilitates the disassembly and assembly of the impact wrench 100 on the auxiliary device 200. In other embodiments, the second moving component 212 can also be a multi-link mechanism. The impact wrench 100 is connected to the output end of the multi-link mechanism, and the multi-link mechanism is driven to move by a driving structure. In some embodiments, the second hinge rod 2123 is provided with a manipulator to actively grasp the lifting ring of the impact wrench 100.

[0145] The robotic arm 21 can also be a multi-degree-of-freedom robotic arm such as a six-degree-of-freedom robotic arm or a four-degree-of-freedom robotic arm in the prior art. It is directly installed on or installed on the traveling mechanism 22 through the support frame 213, and the impact wrench 100 is aligned completely driven by the driving motor 2111.

[0146] The traveling mechanism 22 includes a traveling wheel set 221, a base 222, and a traveling motor 223. The traveling wheel set 221 is rotatably connected to the base 222, the robotic arm 21 is supported on the base 222, and the traveling motor 223 drives the traveling wheel set 221 to rotate, thereby realizing the automatic traveling of the traveling mechanism 22. The traveling mechanism 22 further includes a transmission mechanism. The traveling motor 223 is connected to the traveling wheel set 221 through the transmission mechanism. Among them, the traveling wheel set 221 includes a plurality of traveling wheels, and the traveling wheels are rotatably connected to the base 222 through wheel axles. The traveling motor 223 drives the wheel axles to rotate through the transmission mechanism, and the transmission mechanism is, for example, a gear transmission mechanism. When the distance between the wheel axle and the motor shaft 111 is large, a belt transmission mechanism or a chain transmission mechanism can be used for transmission connection. In other embodiments, a handrail can also be provided on the auxiliary device 200, and the handrail is held to manually push the auxiliary device 200 to travel.

[0147] The traveling wheel set 221 includes a front wheel 2211 and a rear wheel 2212. The traveling motor 223 drives the rear wheel 2212. The front wheel 2211 is a steering wheel and has a steering function. It can be controlled manually, remotely, automatically by presetting a traveling route, or by trace following control, etc. For example, for some regular disassembly and assembly working conditions, a path can be preset to achieve self-traveling and self-positioning. Referring to the prior art, it will not be elaborated here. The front wheel 2211 is a universal wheel and has a self-locking function. The traveling mechanism 22 further includes a speed regulation component 224 added at the handrail. The speed regulation component 224 is configured to adjust the traveling speed of the traveling wheel set 221. The speed regulation component 224 can refer to the prior art and will not be elaborated here.

[0148] The power tool combination further includes a control component. The impact wrench 100 and the auxiliary device 200 are respectively communicatively connected to the control component, so as to realize the automatic control of the impact wrench 100 and the auxiliary device 200, such as controlling the start, stop, rotation speed, and rotation direction of the motor 11, controlling the robotic arm 21 to drive the power tool to a preset position, controlling the traveling speed and steering of the traveling mechanism 22, etc. The control component includes a controller, and the controller uses a dedicated control chip, for example, a single-chip microcomputer or a microcontroller unit (MCU).

[0149] The power tool combination further includes a human-machine interaction panel 29. The human-machine interaction panel 29 is communicatively connected to the control component. The current operating parameters of the power tool combination can be displayed on the human-machine interaction panel 29, such as the parameters of the motor 11, the parameters of the traveling mechanism 22, or the parameters of the robotic arm 21, etc., which is convenient for viewing and understanding the current usage situation. Numerical control programming can also be performed through the human-machine interaction panel 29, such as setting the traveling route of the traveling mechanism 22, setting the parameters of the speed regulation component 224 to adjust the traveling speed of the traveling wheel set 221 and other traveling parameters, as well as the air pressure of the traveling wheels.

[0150] The auxiliary device 200 further includes a frame assembly 23, which is arranged at the rear side of the robotic arm 21. The frame assembly 23 forms a storage space that can store power tools or accessories for a power tool combination. Exemplarily, an impact wrench 100 can be stored in the storage space, taken out from the storage space when using the impact wrench 100, and stored when not using the impact wrench 100.

[0151] The auxiliary device 200 further includes a storage box 24, which is arranged in the storage space. The storage box 24 can store small tools such as sockets and gloves, which is convenient for access. Moreover, the small tools are separated from the first power source 31 and the impact wrench 100 by the storage box 24, avoiding chaos and facilitating management.

[0152] In this embodiment, the power supply 300 includes a first power source 31 and a second power source 32. The first power source 31 is configured to supply power to the robotic arm 21 and / or the traveling mechanism 22, and the second power source 32 is configured to supply power to the impact wrench 100. In some embodiments, the power supply 300 can also supply power to both of them simultaneously through a single power source arranged on the auxiliary device 200 or the impact wrench 100. The first power source 31 is arranged in the storage space. The first power source 31 includes at least one battery pack 30, and the storage space is also equipped with a charger 26, which is configured to charge the battery pack 30. The second power source 32 is a DC power source 30 arranged on the impact wrench 100. The second power source 32 includes at least one battery pack 30, and the charger 26 can also charge the battery pack 30 of the second power source 32. The charger 26 is provided with two double-pack charging interfaces, which can charge four 5.0 Ah battery packs 30 at a time, improving the charging efficiency. The human-machine interaction panel 29 can also display the remaining power of the battery pack 30.

[0153] The auxiliary device 200 further includes a lighting lamp 27 for lighting. It can be arranged on the top of the robotic arm 21, with a large lighting range, or it can also be arranged at the top of the frame assembly 23 or the front side of the robotic arm 21 and other positions. The lighting lamp 27 is provided with a rotatable or liftable seat body to adjust the lighting range of the lighting lamp 27. The lighting lamp 27 can adjust the brightness and is powered by the power supply 300.

[0154] The auxiliary device 200 further includes an air pump 28, which is configured for inflation, such as inflating the traveling wheel set 221 of the traveling mechanism 22, or inflating the wheel sets of some vehicle tools. After the traveling wheels of the traveling wheel set 221 are replaced or used for a long time, the air pump 28 inflates them. The air pump 28 is attached with a pressure display to prevent over-inflation or under-inflation.

[0155] The storage space is divided into multiple layers for easy storage and management of items. Exemplarily, the storage space is divided into three layers. A storage box 24 is installed on the first layer. Correspondingly, a door body 231 is provided at the top of the frame assembly 23 for easy access to items. A charger 26 is placed on the second-layer partition, and an impact wrench 100 can also be placed. A first power supply 31 and an air pump 28 are provided on the third-layer partition. A door body 231 is provided on the side of the frame assembly 23 for easy access to the impact wrench 100, the charger 26, and the air pump 28. Multiple vertical plates can be provided on each layer to form compartments for separating different structures and avoiding interference.

[0156] The outer surface covers of components such as the robotic arm 21 of the auxiliary device 200 and the frame assembly 23 are all subjected to painting for rust prevention to improve aesthetics and corrosion resistance. For example, a protective cover 232 is provided outside the frame assembly 23, and the surface of the protective cover 232 is painted.

[0157] In one embodiment, the dimensions of the auxiliary device 200 are such that the length dimension is greater than or equal to 700 mm, the width dimension is greater than or equal to 1500 mm (the width measured without including the expanded outer shape after mounting the power tool is 957 mm), and the height dimension is greater than or equal to 900 mm. Exemplarily, its dimensions are 805 mm × 1716 mm × 1270 mm. The height of the armrest from the ground is greater than or equal to 850 mm. The lifting height range of the impact wrench 100 driven by the first moving component 211 is 180 mm to 1000 mm. The width of the armrest is 500 mm. The lifting stroke of the impact wrench 100 is 0 to 810 mm. The pressure range of the air pump 28 is 0 to 12 bar. In some embodiments, the dimensions of the auxiliary device 200 are adjusted according to different working conditions.

[0158] This embodiment also provides a combination of power tools, such as Figure 30 shown, which is different from Figure 29 in that the auxiliary device 200 further includes a storage box 25. The storage box 25 is detachably connected to the frame assembly 23 and is located outside the storage space. It can be installed on the top or side of the frame assembly 23 for storing small tools, etc., increasing the storage space.

[0159] The foregoing has shown and described the basic principles, main features, and advantages of the present application. Those skilled in the art should understand that the above embodiments do not limit the present application in any form. Any technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present application.

Claims

1. A handheld power tool, characterized in that: include: a motor including a drive shaft that rotates about a first axis; an output shaft configured to output torque, the output shaft rotating about an output axis; a circuit board assembly configured to control operation of the motor; Chassis, including: a front cover housing extending substantially along the first axis, the front cover housing accommodating at least a portion of the motor; A rear cover shell is installed to the end of the front cover shell away from the output shaft, and a first bearing seat is formed or connected on the inner side surface of the rear cover shell. The first bearing seat is used to support the bearing of the drive shaft away from the end of the output shaft, and an accommodating space is formed on the outer side surface of the rear cover shell; the circuit board assembly is arranged in the accommodating space.

2. The handheld power tool according to claim 1, characterized in that: The circuit board assembly includes a circuit board and an aluminum substrate.

3. The handheld power tool according to claim 1, characterized in that: The driving shaft of the motor is connected with a fan, and the fan is connected to the rear end of the motor.

4. The handheld power tool according to claim 3, characterized in that: The motor includes a stator and a rotor assembly, the drive shaft is formed or connected to the rotor assembly, and the fan is disposed between the stator and the first bearing.

5. The handheld power tool according to claim 4, characterized in that: The circuit board assembly is arranged at the rear end of the fan.

6. The handheld power tool according to claim 1, characterized in that: The front cover shell is cylindrical, and the rear cover shell is axially connected to the front cover shell.

7. The handheld power tool according to claim 1, characterized in that: The rear cover shell is detachably connected to the front cover shell.

8. The handheld power tool according to claim 1, characterized in that: Axially protruding heat dissipation fins are arranged on the inner side of the rear cover shell.

9. The handheld power tool according to claim 8, characterized in that: The heat dissipation fins are arranged along the circumferential direction.

10. The handheld power tool according to claim 1, characterized in that: The housing further includes a second cover body, which is connected to the rear cover shell to cover the opening of the rear cover shell.

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