Power tool, fastening device and handheld power tool

Abstract

A power tool, a fastening device, and a handheld power tool. The power tool comprises: a tool body (110) constituting a gripping portion for a user to grip; a motor (130) comprising a motor output shaft (131) rotating around the drive axis; a battery (140) for supplying power to the motor (130); and at least one working head (120) configured to be driven by the motor (130). The working head (120) has two selectable positions on the tool body (110), i.e., a storage position (M1) where the working head is in a storage state and a working position (M2) wherein the working head is in a working state, wherein the storage position (M1) is provided in the gripping portion.

Description

Electric power tool, fastening device and hand-held electric power tool

[0001] This application claims priority to Chinese Patent Application No. 202411368208.9, filed on September 27, 2024, and Chinese Patent Application No. 202510523008.4, filed on April 24, 2025, the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of tools, in particular to an electric power tool, a fastening device and a hand-held electric power tool. BACKGROUND

[0003] In daily life, fastening devices are needed to fasten or disassemble fasteners, for example, an internal hexagonal wrench or an internal hexagonal wrench set tool has the advantages of compact structure, foldability, convenient portability, etc., and is widely used by users to fasten or disassemble fasteners.

[0004] Currently, the internal hexagonal wrench and the internal hexagonal wrench set tool are both operated by manual rotation by the user. When the user rotates, the angle of each rotation is small, which makes the time for fastening or disassembling the fastener longer and the operation less convenient.

[0005] This section provides background information related to the present application, which may or may not be prior art. SUMMARY

[0006] The present application is to solve or at least alleviate part or all of the above problems. To this end, the present application provides an electric power tool, a fastening device and a hand-held electric power tool, which reduces the operation time by motor driving and improves the convenience of operation.

[0007] In order to achieve the above-mentioned objectives, the present application adopts the following technical solutions:

[0008] In some embodiments, an electric power tool comprises: a tool body constituting a holding portion for a user to hold; a motor comprising a motor output shaft rotating around a driving axis; a battery for powering the motor; at least one working head arranged to be driven by the motor; the working head has two selectable positions on the tool body, i.e., a storage position in a storage state and a working position in a working state; wherein the storage position is arranged in the holding portion.

[0009] In some embodiments, a containing portion is arranged on the tool body corresponding to each working head.

[0010] In some embodiments, the power tool further comprises a transmission assembly disposed between the motor and the working head to transmit the rotational power of the motor to the working head; the transmission assembly comprises a first member; the first member is operable to decouple from a second member to allow the working head to be received into the receiving position; when the first member is coupled to the second member, the working head is located at the working position.

[0011] In some embodiments, the transmission assembly further comprises a transmission gear set disposed to be coupled between the first member and the working head, the first member being able to drive the transmission gear set to rotate; the second member is fixedly disposed on the transmission fixing member and directly or indirectly engaged with the motor output shaft to transmit the rotation of the motor output shaft.

[0012] In some embodiments, the transmission assembly further comprises a third member disposed between the motor output shaft and the second member to transmit the rotation of the motor output shaft to the second member.

[0013] In some embodiments, the transmission gear set comprises a worm and a worm wheel; the worm is driven to rotate by the first member, the worm wheel is engaged with the worm and driven to rotate by the worm; the working head rotates with the worm wheel.

[0014] In some embodiments, a self-locking mechanism is formed between the worm wheel and the worm; when the motor is not started, the working head located at the working position can be manually operated to work on a workpiece.

[0015] In some embodiments, when the working head is at the working position, the working head can rotate around the transmission fixing member; the rotation angle of the working head is 0-180°.

[0016] In some embodiments, the tool body further comprises a chuck storage portion configured to accommodate a plurality of chuck rods of replacement working heads, the plurality of chuck rods being detachably assembled into the chuck fixing member.

[0017] In some embodiments, the chuck fixing member comprises a protrusion portion matched with a clamping groove on the tool body, the chuck fixing member being rotatably and detachably connected to the tool body.

[0018] In some embodiments, the power tool further comprises a fixing assembly disposed between the working head and the motor in the front-rear direction; the fixing assembly comprises a first fixing assembly and a second fixing assembly, the first fixing assembly being fixedly connected to the second fixing assembly, and the second fixing assembly being fixedly connected to the motor.

[0019] In some embodiments, the output torque of the working head is less than or equal to 2.5 N·m.

[0020] In some embodiments, the weight of the tool body is less than or equal to 400 g.

[0021] In some embodiments, the motor has an outer diameter greater than or equal to 15 mm and less than or equal to 30 mm.

[0022] In some embodiments, the tool body extends along a first straight line; in a width direction perpendicular to the first straight line, the tool body has a width less than or equal to 60 mm, and in a height direction perpendicular to the first straight line, the tool body has a height less than or equal to 45 mm.

[0023] In some embodiments, the motor has a maximum rotation speed less than or equal to 30,000 rpm.

[0024] In some embodiments, a fastening device includes: a tool body extending along a first straight line; a motor disposed in the tool body and including a motor output shaft rotating about a drive axis; at least one working head configured to be driven by the motor; the working head having a stowed position in a stowed state and a working position in a working state on the tool body; and the tool body having a length less than or equal to 150 mm in the direction of the first straight line.

[0025] In some embodiments, a handheld power tool includes: a tool body for a user to hold; a motor including a motor output shaft rotating about a drive axis; a battery for powering the motor; and a plurality of working heads configured to be driven by the motor, the working heads having two selectable states of a stowed state and a working state; wherein, when one of the working heads is in the working state, the other working heads have the two selectable states of the stowed state and the working state.

[0026] In some embodiments, the working head is in the stowed position in the stowed state and is in the working position in the working state, and the working head is configured to be switched between the working position and the stowed position by rotation.

[0027] In some embodiments, the tool body extends along a first straight line, and the plurality of working heads are distributed at a front position of at least one first side surface perpendicular to the first straight line.

[0028] In some embodiments, the tool body has a first cross section perpendicular to the first straight line, and a ratio of a circumference of the motor to a circumference of the first cross section is greater than or equal to 0.1 and less than or equal to 0.6.

[0029] In some embodiments, the handheld power tool further includes a transmission assembly disposed between the motor and the working head to transmit rotational power of the motor to the working head; and wherein the working head is detachably mounted on the transmission assembly. BRIEF DESCRIPTION OF DRAWINGS

[0030] FIG. 1 is a perspective view of a handheld power tool according to an embodiment;

[0031] FIG. 2 is an internal structure view of the handheld power tool of FIG. 1;

[0032] Fig. 3 is an exploded perspective view of the hand-held power tool of Fig. 1;

[0033] Fig. 4 is a multi-angle side view of the working head of the hand-held power tool of Fig. 1;

[0034] Fig. 5 is a perspective view of the transmission assembly of Fig. 1;

[0035] Fig. 6 is a schematic view of the internal structure of the transmission assembly of Fig. 1;

[0036] Fig. 7 is a perspective view of a gear slot of an embodiment mating with a connector;

[0037] Fig. 8 is a schematic view of the working head of an embodiment being rotated to a disengaged storage position;

[0038] Fig. 9 is a top view of the working head of an embodiment being stored in a storage position;

[0039] Fig. 10 is a schematic view of the hand-held power tool of an embodiment being electrically operated;

[0040] Fig. 11 is a schematic view of the hand-held power tool of an embodiment being manually operated;

[0041] Fig. 12 is a perspective view of a hand-held power tool of another embodiment including a working head;

[0042] Fig. 13 is a perspective view of the working head of Fig. 12 in a working position;

[0043] Fig. 14 is a rear view of the hand-held power tool of Fig. 12.

[0044] Fig. 15 is a schematic view of the internal structure of the hand-held power tool of Fig. 12;

[0045] Fig. 16 is an exploded perspective view of the hand-held power tool of Fig. 12;

[0046] Fig. 17 is a perspective view of the bit holder of Fig. 12 being rotated relative to a first front surface;

[0047] Fig. 18 is a perspective view of the bit holder of Fig. 12 being rotated relative to the first front surface to a maximum angle;

[0048] Fig. 19 is a schematic view of a lighting device of an embodiment being a surface lighting device;

[0049] Fig. 20 is a schematic view of a bit storage portion of an embodiment being disposed on a second front surface;

[0050] Fig. 21 is a perspective view of a transmission assembly of Fig. 12 including a third member and a securing assembly included by the hand-held power tool;

[0051] Fig. 22 is a second side view of the hand-held power tool of Fig. 12 including a plurality of gear slots;

[0052] Fig. 23 is a schematic view of a blocking stop included in the hand-held power tool of Fig. 12;

[0053] Fig. 24 is a schematic view of a stop groove included in the hand-held power tool of Fig. 12;

[0054] Fig. 25A is a schematic view of the blocking stop and the stop groove of one embodiment in cooperation;

[0055] Fig. 25B is a schematic view of the blocking stop and the stop groove of one embodiment out of cooperation;

[0056] Fig. 26 is a perspective view of Fig. 21 from another perspective;

[0057] Fig. 27 is a perspective view of Fig. 21 and Fig. 26 from another perspective;

[0058] Fig. 28 is a perspective view of a hand-held power tool of another embodiment;

[0059] Fig. 29 is a schematic view of the internal structure of the hand-held power tool of Fig. 28. DETAILED DESCRIPTION

[0060] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above-described accompanying drawings.

[0061] In this application, the terms "including", "containing", "having" or any other similar words are intended to encompass non-exclusive inclusions, so that a process, method, article or device including a series of elements does not only include those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such a process, method, article or device. Without more limitations, the element defined by the phrase "including a" does not exclude the presence of another identical element in the process, method, article or device including the element.

[0062] In this application, the term "and / or", is a description of the association relationship between the associated objects, which means that there can be three kinds of relationships. For example, A and / or B, can represent the following three cases: A exists alone, A and B exist together, B exists alone. In addition, the character " / " in this application generally represents a "and / or" relationship between the front and rear associated objects.

[0063] In this application, the terms "connected", "coupled", "engage", "engagement", "mounting" can be direct connection, coupling or mounting, or indirect connection, coupling or mounting through an intermediate part. For example, direct connection refers to two parts or components connected together without an intermediate part, and indirect connection refers to two parts or components connected to at least one intermediate part, and the two parts or components are connected through the intermediate part. In addition, "connection" and "coupling" are not limited to physical or mechanical connection or coupling, and can include electrical connection or coupling.

[0064] In this application, those of ordinary skill in the art will understand that the relative terms used in connection with quantities or conditions (for example, "about", "approximately", "substantially" and the like) include the values described and have the meaning indicated by the context. For example, the relative terms at least include the degree of error related to the measurement of a specific value, the tolerance caused by manufacturing, assembly, use, etc. related to a specific value. Such terms should also be considered to disclose the range defined by the absolute values of the two endpoints. The relative terms can refer to the indicated value plus or minus a certain percentage (for example, 1%, 5%, 10% or more). The numerical value without the relative term should also be disclosed as a specific value with a tolerance. In addition, "substantially" when expressing the relative angular positional relationship (for example, substantially parallel, substantially perpendicular), can refer to plus or minus a certain degree (for example, 1 degree, 5 degrees, 10 degrees or more) based on the indicated angle.

[0065] In this application, those of ordinary skill in the art will understand that the functions performed by the components can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by the parts can also be performed by one part, one component, or multiple parts in combination.

[0066] In this application, the terms "up", "down", "left", "right", "front", "back" and the like are described in the orientation and positional relationship shown in the drawings, and should not be understood as limiting the embodiments of the application. In addition, it should also be understood in the context that when referring to one element connected to another element "up" or "down", it can not only be directly connected to another element "up" or "down", but also indirectly connected to another element "up" or "down" through an intermediate element. It should also be understood that the terms "up", "down", "left", "right", "front", "back" and the like not only represent the positive direction, but also can be understood as the side direction. For example, the lower side can include the lower side, the lower left side, the lower right side, the lower front side and the lower back side, etc.

[0067] At present, the inner hexagonal wrench or the inner hexagonal wrench set tool is operated by manual rotation of the user, and the user has limited amplitude of rotation each time, and the user needs to rotate the inner hexagonal wrench multiple times to complete the fastening or disassembly of the fastener. Therefore, the operation process takes a long time, and the operation is relatively inconvenient. Based on this, the application proposes a mobile electric inner hexagonal wrench, which drives the hexagonal wrench to work through a motor, reduces the operation time, and improves the convenience of operation.

[0068] As shown in FIGS. 1 and 2, the electric inner hexagonal wrench 100 of one embodiment of the application is shown, and for the purpose of clearly illustrating the technical solutions of the application, the upper side, the lower side, the front side, the rear side, the left side and the right side as shown in FIG. 1 are also defined. As shown in FIGS. 1 and 2, the electric inner hexagonal wrench 100 includes a tool body 110, a working head 120, a motor 130, a power supply assembly 140, a circuit board 150 and a transmission assembly 200. The tool body 110 constitutes a holding part for the user to hold, and the tool body 110 includes four side plates and two cover plates, the four side plates are connected in sequence at the front side, the left side, the rear side and the right side, and the two cover plates are arranged at the upper side and the lower side, and are connected with the four side plates to constitute a containing housing of the tool body 110, the motor 130, the power supply assembly 140 and the circuit board 150 are all arranged in the containing housing, and the circuit board 150 is configured to control the operation of the electric inner hexagonal wrench 100. The working head 120 is driven by the motor 130, and the working head 120 has two selectable states of a receiving state and a working state. The transmission assembly 200 is arranged between the working head 120 and the motor 130, and is configured to transmit the rotary power of the motor 130 to the working head 120.

[0069] In some embodiments, as shown in FIGS. 1 and 2, the tool body 110 extends along a first straight line A, and the first straight line A is a straight line extending in the front-rear direction. As shown in FIG. 3, the tool body 110 includes two first side surfaces 111, and the two first side surfaces 111 are respectively the front side surface and the rear side surface of the tool body 110, and the first side surface 111 is perpendicular to the first straight line A. The tool body 110 also includes two second side surfaces 112, and the two second side surfaces 112 are respectively the left side surface and the right side surface of the tool body 110, and the second side surface 112 is parallel to the first straight line A. The two first side surfaces 111 and the two second side surfaces 112 are constituted by the four side plates described above. The tool body 110 also includes a first front surface 113 and a second front surface 114, the first front surface 113 is the upper side surface of the tool body 110, and the second front surface 114 is the lower side surface of the tool body 110, the first front surface 113 and the second front surface 114 extend along the first straight line A, and the first front surface 113 and the second front surface 114 are constituted by the two cover plates described above. Thus, the tool body 110 as a whole presents a box.

[0070] The motor 130 is disposed along the first straight line A in the tool body 110, and the motor 130 includes a motor output shaft 131 capable of rotating about a driving axis. In the present embodiment, the driving axis coincides with the first straight line A, and the motor output shaft 131 has one output end 1311 in each of two opposite directions indicated by the first straight line A, i.e., the motor output shaft 131 has one output end 1311 at the front side and one output end 1311 at the rear side. In other alternative embodiments, the driving axis is disposed parallel to but not coinciding with the first straight line A. In other alternative embodiments, the driving axis is disposed at an angle with the first straight line A.

[0071] In the present embodiment, the power supply assembly 140 is a direct current power supply, which can be a battery. The battery cooperates with a corresponding power supply circuit to supply power to the electric hexagonal wrench 100 and is configured to start the motor 130 to rotate. Those skilled in the art should understand that the direct current power supply is not limited to the scenario of using a battery, which can be a built-in rechargeable battery or a standard battery. It can be understood that the electric hexagonal wrench 100 can also be powered by mains electricity or alternating current power supply, cooperating with a corresponding rectification, filtering and voltage regulation circuit to supply power to the corresponding components in the machine. In the following description, the battery 140 will be used instead of the power supply assembly 140, but it cannot be regarded as a limitation of the present application. The rated voltage of the battery 140 is less than or equal to 4V. Alternatively, the voltage of the battery 140 is 3.7V. Alternatively, the voltage of the battery 140 is 3.5V.

[0072] In some embodiments, as shown in FIG. 2, the length L of the tool body 110 is less than or equal to 150mm. Alternatively, the length L of the tool body 110 is 139mm. Alternatively, the length L of the tool body 110 is 135mm. Alternatively, the length L of the tool body 110 is 124mm. Alternatively, the length L of the tool body 110 is 97mm. In some embodiments, as shown in FIG. 2, in the width direction perpendicular to the first straight line A, the width W of the tool body 110 is less than or equal to 60mm. Alternatively, the width W of the tool body 110 is 58mm. Alternatively, the width W of the tool body 110 is 55mm. Alternatively, the width W of the tool body 110 is 46mm. In some embodiments, as shown in FIG. 1, in the height direction perpendicular to the first straight line A, the height H of the tool body 110 is less than or equal to 50mm. Alternatively, the height H of the tool body 110 is 48mm. Alternatively, the height H of the tool body 110 is 45mm. Alternatively, the height H of the tool body 110 is 42mm.

[0073] In some embodiments, the tool body 110 has a first cross section perpendicular to the first straight line A, and the first cross section has a perimeter less than or equal to 220 mm. That is, the sum of the width W and the height H of the tool body 110 is less than or equal to 220 mm. Optionally, the first cross section has a perimeter of 210 mm. Optionally, the first cross section has a perimeter of 202 mm. Optionally, the first cross section has a perimeter of 190 mm. In some embodiments, the tool body 110 has a weight less than or equal to 400 g, so as to facilitate the user to carry, and meanwhile the user is not easily tired when using for a long time. Optionally, the tool body 110 has a weight of 380 g. Optionally, the tool body 110 has a weight of 360 g.

[0074] In some embodiments, the motor 130 has a maximum rotation speed less than or equal to 25000 rpm. Optionally, the motor 130 has a maximum rotation speed of 22000 rpm. Optionally, the motor 130 has a maximum rotation speed of 19000 rpm. Optionally, the motor 130 has a maximum rotation speed of 17000 rpm. In some embodiments, the motor 130 has a rated output power less than or equal to 17 W, and a peak power less than or equal to 37 W. Optionally, the motor 130 has a rated output power of 15 W. Optionally, the motor 130 has a rated output power of 12 W. Optionally, the motor 130 has a rated output power of 10 W. Optionally, the motor 130 has a peak power of 35 W. Optionally, the motor 130 has a peak power of 31 W.

[0075] In some embodiments, the motor 130 has an outer diameter greater than or equal to 15 mm and less than or equal to 28 mm. Optionally, the motor 130 has an outer diameter of 17 mm. Optionally, the motor 130 has an outer diameter of 20 mm. Optionally, the motor 130 has an outer diameter of 24 mm.

[0076] In some embodiments, the motor 130 has a perimeter-to-perimeter ratio greater than or equal to 0.1 and less than or equal to 0.6, wherein the perimeter of the motor 130 refers to the circumference of the motor 130. Optionally, the motor 130 has a perimeter-to-perimeter ratio greater than or equal to 0.2 and less than or equal to 0.6. Optionally, the motor 130 has a perimeter-to-perimeter ratio greater than or equal to 0.2 and less than or equal to 0.5. Optionally, the motor 130 has a perimeter-to-perimeter ratio greater than or equal to 0.24 and less than or equal to 0.45. Optionally, the motor 130 has a perimeter-to-perimeter ratio greater than or equal to 0.26 and less than or equal to 0.42.

[0077] The working head 120 is a plurality of working heads, and the working heads 120 are distributed on the front part of the at least one first side surface 111. The working heads 120 are arranged on the front part of the front side surface or the rear side surface of the electric hexagonal wrench 100. Alternatively, the working heads 120 can be arranged only on the front part of the front side surface of the electric hexagonal wrench 100. Alternatively, the working heads 120 can be arranged only on the front part of the rear side surface of the electric hexagonal wrench 100. Alternatively, the working heads 120 can be arranged only on the front part of the front side surface and the rear side surface of the electric hexagonal wrench 100. The working head 120 can be a hexagonal bit rod, or the working head 120 can be a star bit rod, or the working head 120 can be any other specification bit rod.

[0078] In some embodiments, the output torque of the working head 120 is less than or equal to 2 N·m. Alternatively, the output torque of the working head 120 is 1.8 N·m. Alternatively, the output torque of the working head 120 is 1.5 N·m. Alternatively, the output torque of the working head 120 is 1.1 N·m.

[0079] As shown in FIG. 1, the working heads 120 are arranged on the front part of the front side surface and the rear side surface as an example. Alternatively, the plurality of working heads 120 can be evenly distributed on the front part of the two first side surfaces 111. For example, the plurality of working heads 120 are four, and two working heads 120 are distributed on the front part of the front side surface, and two working heads 120 are distributed on the front part of the rear side surface. Alternatively, the plurality of working heads 120 can also be unevenly distributed on the front part of the two first side surfaces 111.

[0080] The plurality of working heads 120 each include two states of a storage state and a working state. When one working head 120 of the plurality of working heads 120 is in the working state, the other working heads 120 can be in the storage state or the working state, and the number of working heads 120 in the working state and the storage state is not limited. Therefore, each working head 120 is independent and does not interfere with each other.

[0081] In some embodiments, when the working head 120 is in the storage state, the working head 120 is located at the storage position M1; and when the working head 120 is in the working state, the working head 120 is located at the working position M2. The working head 120 has two selectable positions of the storage position M1 in the storage state and the working position M2 in the working state on the tool body 110. When one working head 120 is in the working position M2, the other working heads 120 have two states of the storage position M1 and the working position M2. The switching between the storage position M1 and the working position M2 of the working head 120 is realized by rotation, and the rotation angle range of the working head 120 is 0-180°.

[0082] When the rotation angle of the working head 120 is 0, the working head 120 is located in the storage position M1, in the storage state. When the rotation angle of the working head 120 is greater than 0, the working head 120 is away from the storage position M1 to the working position M2, in the working state. As shown in FIG. 4, the rotation angle of the working head 120 can be 90°. Alternatively, the rotation angle of the working head 120 can be 135°. Alternatively, the rotation angle of the working head 120 can be 180°. When the rotation angle of the working head 120 is 90°, the working head 120 is perpendicular to the tool body 110 as a whole. When the rotation angle of the working head 120 is 180°, the working head 120 is parallel to the tool body 110 as a whole.

[0083] In some embodiments, the storage position M1 of the working head 120 is arranged in the holding part of the tool body 110. As shown in FIG. 3, the tool body 110 is provided with a plurality of accommodating parts 115, which are respectively arranged on the first front surface 113 and the second front surface 114. The number of the plurality of accommodating parts 115 is greater than or equal to the number of the plurality of working heads 120, so that each working head 120 has its corresponding storage position M1. Alternatively, when the number of the plurality of accommodating parts 115 is equal to the number of the plurality of working heads 120, each working head 120 has its corresponding storage position M1. Alternatively, when the number of the plurality of accommodating parts 115 is greater than the number of the plurality of working heads 120, each working head 120 has its corresponding storage position M1, and the plurality of accommodating parts 115 is provided with an accessory storage part 1151, which is configured to store an accessory that can replace the working head 120.

[0084] In some embodiments, the accessory that replaces the working head 120 can be a batch rod with the same size specification as the working head 120, or can be different from the working head 120. For example, when the working head 120 is a hexagonal batch rod, the accessory can be a star batch rod, so as to replace the working head 120 to be applicable to various occasions. Alternatively, the accessory and the working head 120 are both hexagonal batch rods, but the size of the accessory is smaller than that of the working head 120, so as to use the corresponding working head 120 respectively when different size requirements are needed.

[0085] In some embodiments, as shown in FIG. 1, the working head 120 is arranged on the electric hexagonal wrench 100 based on the transmission assembly 200, i.e. the transmission assembly 200 comprises a part connected with the electric hexagonal wrench 100, and the transmission assembly 200 further comprises a part connected with the working head 120. Optionally, the working head 120 is detachably mounted on the transmission assembly 200. Optionally, the working head 120 is fixedly mounted on the transmission assembly 200. When the working head 120 is detachably mounted on the transmission assembly 200, and the number of the plurality of accommodating portions 115 is greater than the number of the plurality of working heads 120, the working head 120 can be replaced by the accessory in the accessory storage position 1151, thereby increasing the service life of the electric hexagonal wrench 100.

[0086] In some embodiments, as shown in FIG. 2, when the working head 120 is in the storage position M1, i.e. the working head 120 is located on the first front surface 113 and / or the second front surface 114, the horizontal projection of the working head 120 in the horizontal plane at least partially overlaps with the horizontal projection of the motor 130, the battery 140 and the circuit board 150 in the horizontal plane. That is, when the working head 120 is in the storage position M1, the working head 120 is located in the holding portion of the electric hexagonal wrench 100, and does not protrude out of the tool body 110, so that the overall volume of the electric hexagonal wrench 100 is small, and the user can conveniently carry and store the electric hexagonal wrench 100.

[0087] Optionally, the horizontal projection of the working head 120 in the horizontal plane at least partially overlaps with the horizontal projection of the motor 130 in the horizontal plane. Optionally, the horizontal projection of the working head 120 in the horizontal plane at least partially overlaps with the horizontal projection of the battery 140 in the horizontal plane. Optionally, the horizontal projection of the working head 120 in the horizontal plane at least partially overlaps with the horizontal projection of the circuit board 150 in the horizontal plane. Optionally, the horizontal projection of the working head 120 in the horizontal plane at least partially overlaps with the horizontal projection of any two of the motor 130, the battery 140 and the circuit board 150 in the horizontal plane. Optionally, the horizontal projection of the working head 120 in the horizontal plane at least partially overlaps with the horizontal projection of all of the motor 130, the battery 140 and the circuit board 150 in the horizontal plane.

[0088] In some embodiments, the horizontal projections of the motor 130, the battery 140 and the circuit board 150 in a horizontal plane do not overlap with each other. In some embodiments, the projections of the motor 130, the battery 140 and the circuit board 150 in a first plane parallel to the first straight line A and perpendicular to the horizontal plane do not overlap with each other. The first plane can be regarded as the two second side surfaces 112, i.e., the projections of the motor 130, the battery 140 and the circuit board 150 on the left side surface and the right side surface of the electric inner hexagonal wrench 100 do not overlap with each other. Therefore, the motor 130, the battery 140 and the circuit board 150 are independently arranged separately from each other, and in the up-down direction, there is no overlap among the three. Alternatively, the motor 130, the circuit board 150 and the battery 140 can be independently arranged in the front-to-back order as shown in FIGS. 2 and 3, or other independent arrangement manners or orders, which are not limited in the present application.

[0089] In some embodiments, as shown in FIG. 2, the two second side surfaces 112 each include a portion protruding from the two first side surfaces 111 in the front-to-back direction, and the first side surface 111 and the two second side surfaces 112 form two accommodation spaces in the front-to-back direction, which are configured to accommodate the transmission assembly 200. As shown in FIGS. 5-7, the electric inner hexagonal wrench 100 further includes a transmission fixing member 101, which is a shaft body arranged in the accommodation space of the electric inner hexagonal wrench 100. The two ends of the transmission fixing member 101 are in contact with the two second side surfaces 112, and are fixedly connected to the two second side surfaces 112 based on the fixing member 1011. Alternatively, the fixing member 1011 can be a screw or a locking screw. In addition, the fixing member 1011 can also be any element capable of achieving the fixing function, which is not limited in the present application.

[0090] In some embodiments, the plurality of working heads 120 distributed at the front portion of the at least one first side surface 111 includes that the working heads 120 are arranged on the transmission fixing member 101 to be distributed at the front portion of the first side surface 111. The working heads 120 are sleeved with connecting members 121, the connecting members 121 are sleeved on the transmission fixing member 101, and are configured to connect the working heads 120 to the transmission fixing member 101. The connecting members 121 are movable left and right relative to the transmission fixing member 101, the connecting members 121 are rotatable relative to the transmission fixing member 101, and the rotation angle range of the working heads 120 relative to the transmission fixing member 101 is 0-180°, so as to realize the switching of the working heads 120 between the storage position M1 and the working position M2.

[0091] In some embodiments, as shown in FIG. 7, a plurality of gear slots 102 are arranged on the inner part of the two second sides 112, respectively, and are distributed at a certain angle around the transmission fixing part 101. Alternatively, the plurality of gear slots 102 can be distributed around the transmission fixing part 101 in a complete circle. Alternatively, the plurality of gear slots 102 can be distributed around the transmission fixing part 101 in a half circle. Alternatively, the plurality of gear slots 102 can be distributed around the transmission fixing part 101 in a sector of any angle.

[0092] In some embodiments, the inner part of the connecting part 121 is provided with an elastic element 1211 and a gear fixing part 1212, the gear fixing part 1212 is matched with the gear slot 102, and the elastic element 1211 is connected with the gear fixing part 1212. When the working head 120 is in the working position M2, the elastic element 1211 presses the gear fixing part 1212 in the gear slot 102, so that the working head 120 can be fixed at a certain angle and remain stationary in the working position M2. When the working head 120 needs to switch the angle, i.e., when the working head 120 rotates, the gear fixing part 1212 can be switched from one gear slot 102 to another gear slot 102 in the plurality of gear slots 102, and can continue to switch and rotate until the desired angle is reached, and the elastic element 1211 again presses the gear fixing part 1212 in the gear slot 102 to keep the working head 120 stationary. Alternatively, as shown in FIG. 7, the elastic element 1211 can be a spring, and the end of the gear fixing part 1212 matched with the gear slot 102 can be spherical, so that the gear fixing part 1212 can be conveniently switched when switching in the plurality of gear slots 102.

[0093] As shown in FIG. 8, the inner end of the outermost side of the accommodating part 115 corresponding to the working head 120 is provided with a boss 1152, which is configured to push the working head 120 outward of the tool body 110, i.e., to the left and / or right side of the tool body 110, when the working head 120 rotates from the working position M2 to the storage position M1, so that the elastic element 1211 is further pressed, the gear fixing part 1212 is pressed in the gear slot 102 and remains stationary, and the working head 120 is kept stationary in the corresponding accommodating part 115.

[0094] In some embodiments, the two first sides 111 are respectively provided with a hole matched with the motor output shaft 131 of the motor 130, and the output end 1311 of the motor output shaft 131 includes a protruding part protruding out of the hole of the two first sides 111 in the front-back direction. The motor 130 further includes two motor teeth 132 fixed on the end of the protruding part of the motor output shaft 131, which are configured to cooperate with the transmission assembly 200.

[0095] As shown in FIG. 6, the transmission assembly 200 is arranged between the working head 120 and the motor 130, and the transmission assembly 200 comprises a first member 210 and a second member 220, which comprise a first condition of mutual disengagement and a second condition of mutual coupling. In the first condition of mutual disengagement, the first member 210 and the second member 220 are disengaged from each other when the working head 120 is in the storage state, and in the second condition of mutual coupling, the first member 210 and the second member 220 are coupled to each other when the working head 120 is in the working state.

[0096] The second member 220 is fixedly arranged on the transmission fixing member 101, and the second member 220 is fixedly sleeved on the transmission fixing member 101. The second member 220 comprises a first gear 221, a second gear 222 and a third gear 223, the second gear 222 and the third gear 223 are arranged on the left and right sides of the first gear 221 respectively, the second gear 222 and the third gear 223 are two gears with the same size and shape, and the diameter of the first gear 221 is larger than that of the second gear 222 and the third gear 223. Optionally, the first gear 221, the second gear 222 and the third gear 223 are integrally formed. Optionally, the first gear 221, the second gear 222 and the third gear 223 are separately formed, and the second gear 222 and the third gear 223 are fixedly connected to the left and right sides of the first gear 221.

[0097] The second member 220 is engaged with the motor output shaft 131, and the first gear 221 is engaged with the motor tooth 132. Since the first gear 221 is engaged with the motor tooth 132, the rotation of the motor output shaft 131 drives the rotation of the motor tooth 132, so that the motor tooth 132 drives the rotation of the first gear 221, and the first gear 221 in turn drives the rotation of the second gear 222 and the third gear 223, i.e. the second member 220 rotates as a whole. When the second member 220 and the first member 210 are in the second condition of mutual coupling, the rotation of the second member 220 can drive the rotation of the first member 210, and thus the rotation of the motor 130 can be transmitted to the transmission assembly 200 through the second member 220.

[0098] In some embodiments, since the diameter of the first gear 221 is large, a protective member 2211 is arranged on the outer side of the first gear 221, the protective member 2211 surrounds the first gear 221 and is fixed on the first front face 113 and the second front face 114 of the tool body 110, so as to avoid injury caused by accidental touch of the user when the first gear 221 rotates, and the safety of the electric hexagonal wrench 100 is improved.

[0099] In some embodiments, the transmission assembly 200 further comprises a transmission wheel set 230 coupled between the first member 210 and the working head 120, the first member 210 being capable of driving the transmission wheel set 230 to rotate, so that the transmission wheel set 230 drives the working head 120 to rotate. As shown in FIG. 6, the transmission wheel set 230 comprises a worm 231 and a worm wheel 232, the worm 231 and the worm wheel 232 being disposed inside the connecting member 121 and being in engagement with each other. The worm 231 rotates synchronously with the first member 210, and the rotation of the first member 210 drives the worm 231 to rotate. The worm 231 is provided with a worm rotation shaft inside, and the worm 231 is fixed on the worm rotation shaft. The first member 210 is disposed at an end of the worm rotation shaft close to the second member 220, and the first member 210 is fixed on the end of the worm rotation shaft. Alternatively, as shown in FIG. 6, the first member 210 can be fixed on the end of the worm rotation shaft by a screw. In addition, the first member 210 can also be fixed on the worm rotation shaft by any other element capable of achieving the function of fixation. Thus, the first member 210, the worm rotation shaft and the worm 231 can be regarded as a whole, and the rotation of the first member 210 can drive the worm rotation shaft to rotate synchronously, so that the worm 231 outside the worm rotation shaft can also rotate synchronously. Since the worm wheel 232 is in engagement with the worm 231, the rotation of the worm 231 drives the worm wheel 232 to rotate. The working head 120 is in contact with the worm wheel 232, and the working head 120 is fixedly or detachably disposed on the worm wheel 232, so that the rotation of the worm wheel 232 can drive the working head 120 to rotate.

[0100] Therefore, in the second case where the first member 210 and the second member 220 are coupled to each other as shown in FIG. 5, i.e. when the working head 120 is in the working position M2, the rotation of the motor 130 drives the motor teeth 132 to rotate, the rotation of the motor teeth 132 drives the second member 220 to rotate, the rotation of the second member 220 drives the first member 210 coupled thereto to rotate, so that the first member 210 drives the worm 231 to rotate synchronously, the worm 231 drives the worm wheel 232 to rotate, the worm wheel 232 drives the working head 120 to rotate synchronously, thereby enabling the working head 120 to work.

[0101] When the working head 120 is in the storage position Ml, as shown in FIG. 9, the boss 1152 pushes the working head 120 outwardly towards the outside of the tool body 110, so that the first member 210 moves outwardly together with the connecting member 121, thereby moving away from the second member 220, and the first member 210 and the second member 220 are disengaged from each other. At this time, even if the motor 130 rotates, the working head 120 cannot be driven to rotate, so that the working head 120 remains stationary in the storage position Ml. Therefore, the first member 210 can be operated to disengage from the second member 220, so as to allow the working head 120 to be stored in the storage position Ml.

[0102] The above is the working principle of the electric hexagonal wrench 100 in the electric mode. By rotating the working head 120 to the working position, the working head 120 is directly driven to rotate based on the driving of the motor 130, as shown in FIG. 10. The working head 120 rotates relative to the tool body 110, and the working head 120 directly fastens or disassembles the fastener, thereby reducing the time of manual operation of the user, improving the convenience of operation of the user, and greatly improving the efficiency of using the hexagonal wrench type fastening device.

[0103] In some embodiments, a self-locking is formed between the worm 231 and the worm wheel 232. The rotation of the worm 231 can drive the rotation of the worm wheel 232, but the rotation of the worm wheel 232 cannot drive the rotation of the worm 231. Thus, when the motor 130 is not started or the electric hexagonal wrench 100 is insufficient in power, the electric hexagonal wrench 100 further includes a manual mode. After the user manually rotates the working head 120 to the working position M2 at the desired angle, the user directly rotates the entire electric hexagonal wrench 100. At this time, since the rotation of the worm wheel 232 cannot drive the rotation of the worm 231, the worm wheel 232 and the worm 231 are integrated, that is, the working head 120 on the worm wheel 232 and the tool body 110 are integrated, that is, as shown in FIG. 11, the rotation of the tool body 110 drives the synchronous rotation of the working head 120, so that the user manually rotates the entire electric hexagonal wrench 100 to fasten or disassemble the fastener.

[0104] In some embodiments, the electric hexagonal wrench 100 further includes at least one switch piece 160. The switch piece 160 is arranged on any one of the second side surfaces 112. The switch piece 160 controls the rotation of the corresponding working head 120 based on the circuit board 150. In some embodiments, the electric hexagonal wrench 100 includes at least two switch pieces 160. The switch pieces 160 are arranged on the two second side surfaces 112. Alternatively, the at least two switch pieces 160 can be arranged on the two second side surfaces 112, respectively. Alternatively, the at least two switch pieces 160 can be arranged on any one of the two second side surfaces 112. Each switch piece 160 includes a first button 161 and a second button 162. The first button 161 controls the forward rotation of the motor 130 based on the circuit board 150. The second button 162 controls the reverse rotation of the motor 130 based on the circuit board 150.

[0105] Optionally, when the number of working heads 120 is two and the two working heads 120 are located at the front positions of the same first side 111, only one switch piece 160 can be provided, and the one switch piece 160 is configured to control the working heads 120 of the same side. Optionally, when the number of working heads 120 is two and the two working heads 120 are located at the front positions of the two first sides 111 respectively, the two switch pieces 160 are configured to control the rotation of one working head 120 respectively. When the working head 120 is in the working position M2, the first button 161 or the second button 162 of the corresponding switch piece 160 is pressed to control the rotation of the motor 130, and then the rotation of the working head 120 is controlled based on the transmission assembly 200. Optionally, when the number of working heads 120 is four and the four working heads 120 are distributed at the front positions of the two first sides 111 respectively, and the number of switch pieces 160 is two, one switch piece 160 is configured to control the rotation of the working head 120 of the front side of the first side 111, and the other switch piece 160 is configured to control the rotation of the working head 120 of the rear side of the first side 111. Optionally, when the number of working heads 120 is four and the four working heads 120 are distributed at the front positions of the two first sides 111 respectively, and the number of switch pieces 160 is four, the four switch pieces 160 are configured to control the rotation of the corresponding working head 120 respectively. The two switch pieces 160 provided on the same side of the second side 112 are configured to control the rotation of the working heads of the front side and the rear side respectively, so that the user can conveniently control the rotation of the working head when operating the electric inner hexagonal wrench 100 with the left hand or the right hand. In addition, the number of working heads 120 can also be other numbers, and the number of switch pieces 160 can also be other numbers, and the corresponding control relationship is not described here.

[0106] In some embodiments, the electric inner hexagonal wrench 100 further comprises a power display device 170 configured to display the power condition of the electric inner hexagonal wrench 100. Optionally, the power display device 170 can be provided on the second side 112. Optionally, the power display device 170 can be provided on the first front surface 113 and / or the second front surface 114. In addition, the power display device 170 can also be provided at any position convenient for the user to check the power condition, which is not limited in the present application.

[0107] In some embodiments, the power display device 170 is a display screen, which can display numbers, i.e. display the specific power condition, such as 100%, 75%, etc. In some embodiments, the power display device 170 is an indicator light, which indicates different colors when the battery 140 is in different states. Optionally, the indicator light indicates three colors, the indicator light indicates green when the battery 140 is fully charged; the indicator light indicates yellow when the power of the battery 140 is greater than or equal to 30% and less than 100%; the indicator light indicates red when the power of the battery 140 is less than 30%. In addition, the indicator light can also be two colors, four colors or any other number of colors, which are not limited by the present application. The power conditions of the battery 140 corresponding to different colors of the indicator light are not limited by the present application.

[0108] In some embodiments, when the power of the battery 140 is insufficient, the battery 140 can be removed from the tool body 110 and replaced. In some embodiments, the electric hexagonal wrench 100 further comprises a battery interface 141, which is configured to charge the battery 140. Optionally, the power display device 170 can indicate when the battery 140 is charging. Optionally, when the power display device 170 is a display screen, it can directly display "charging" and "fully charged" after charging is completed. Optionally, when the power display device 170 is an indicator light, it can indicate charging by flashing or preset flashing frequency, and indicate full charge by constant light after charging is completed. In addition, the indicator light can also indicate charging or full charge by other ways, which are not limited by the present application.

[0109] In some embodiments, FIGS. 12-15 show an electric hexagonal wrench 100 of another embodiment of the present application, in order to clearly illustrate the technical solutions of the present application, the upper side, the lower side, the front side, the rear side, the left side and the right side as shown in FIG. 12 are defined. The electric hexagonal wrench 100 also comprises a tool body 110, a working head 120, a motor 130, a power assembly 140, a circuit board 150 and a transmission assembly 200. The tool body 110 constitutes a holding part for a user to hold, and the tool body 110 also comprises two first side surfaces 111, two second side surfaces 112, a first front surface 113 and a second front surface 114, which together form a containing housing of the tool body 110, the motor 130, the power assembly 140 and the circuit board 150 are all arranged in the containing housing. The working head 120 is driven by the motor 130, in the present example, the number of the working head 120 is only one, and the working head 120 is arranged at the front side of the electric hexagonal wrench 100.

[0110] The tool body 110 extends along a first straight line A, and the motor 130 is arranged in the tool body 110 along the first straight line A as well, the first straight line A being a straight line extending in the front-rear direction. The motor 130 includes a motor output shaft 131 capable of rotating about a driving axis, in the embodiment, the driving axis coincides with the first straight line A, and the motor output shaft 131 has only one output end 1311 on the front side indicated by the first straight line A, the output end 1311 cooperating with the working head 120 to drive the working head 120 to rotate.

[0111] In the embodiment, the power supply assembly 140 is also replaced by a battery 140, which will not be described herein. The rated voltage of the battery 140 is less than or equal to 4V. In some embodiments, as shown in FIG. 15, the length L1 of the tool body 110 is less than or equal to 150mm. Alternatively, the length L1 of the tool body 110 is 139mm. Alternatively, the length L1 of the tool body 110 is 135mm. Alternatively, the length L1 of the tool body 110 is 124mm. Alternatively, the length L1 of the tool body 110 is 97mm. In some embodiments, as shown in FIG. 15, in the width direction perpendicular to the first straight line A, the width W1 of the tool body 110 is less than or equal to 60mm. Alternatively, the width W1 of the tool body 110 is 58mm. Alternatively, the width W1 of the tool body 110 is 55mm. Alternatively, the width W1 of the tool body 110 is 46mm. In some embodiments, as shown in FIG. 12, in the height direction perpendicular to the first straight line A, the height H1 of the tool body 110 is less than or equal to 45mm. Alternatively, the height H1 of the tool body 110 is 43mm. Alternatively, the height H1 of the tool body 110 is 40mm. Alternatively, the height H1 of the tool body 110 is 38mm.

[0112] In some embodiments, the tool body 110 has a first cross section perpendicular to the first straight line A, and the perimeter of the first cross section is less than or equal to 210mm. That is, twice the sum of the width W1 and the height H1 of the tool body 110 is less than or equal to 210mm. Alternatively, the perimeter of the first cross section is 200mm. Alternatively, the perimeter of the first cross section is 202mm. Alternatively, the perimeter of the first cross section is 190mm. In some embodiments, the weight of the tool body 110 is less than or equal to 400g, so as to facilitate the user to carry, and the user is not easy to be tired when using for a long time.

[0113] In some embodiments, the motor 130 has a maximum rotation speed less than or equal to 30000 rpm. Optionally, the motor 130 has a maximum rotation speed of 28000 rpm. Optionally, the motor 130 has a maximum rotation speed of 26000 rpm. Optionally, the motor 130 has a maximum rotation speed of 25000 rpm. In some embodiments, the motor 130 has a rated output power less than or equal to 26 W and a peak power less than or equal to 48 W. Optionally, the motor 130 has a rated output power of 25 W. Optionally, the motor 130 has a rated output power of 23 W. Optionally, the motor 130 has a rated output power of 20 W. Optionally, the motor 130 has a peak power of 45 W. Optionally, the motor 130 has a peak power of 40 W.

[0114] In some embodiments, the motor 130 has an outer diameter greater than or equal to 15 mm and less than or equal to 30 mm. Optionally, the motor 130 has an outer diameter of 16 mm. Optionally, the motor 130 has an outer diameter of 18 mm. Optionally, the motor 130 has an outer diameter of 20 mm. Optionally, the motor 130 has an outer diameter of 24 mm. Optionally, the motor 130 has an outer diameter of 28 mm. In some embodiments, the motor 130 has a circumference-to-circumference ratio greater than or equal to 0.1 and less than or equal to 0.6, wherein the circumference of the motor 130 refers to the circumference of the motor 130.

[0115] The working head 120 is a working head distributed on the front position of the at least one first side surface 111, and the working head 120 is arranged at least on the front position of the front side surface of the electric hexagonal wrench 100. In some embodiments, the working head 120 has an output torque less than or equal to 2.5 N·m. Optionally, the working head 120 has an output torque of 2.2 N·m. Optionally, the working head 120 has an output torque of 2 N·m. Optionally, the working head 120 has an output torque of 1.5 N·m. The working head 120 also has two selectable positions of a storage position M1 in a storage state and a working position M2 in a working state on the tool body 110, and the working head 120 has a rotation angle range of 0-180°, and the positional relationship between the working head 120 and the tool body 110 is the same as described above, and details are not repeated here.

[0116] In some embodiments, as shown in FIG. 15, the battery pack 140 is arranged in the tool body 110 along a direction parallel to the first straight line A, i.e. the battery pack 140 is arranged in the tool body 110 along the front-rear direction. The circuit board 150 is arranged at one side of the battery pack 140, and the plane on which the circuit board 150 is arranged is parallel to the two second side surfaces 112, i.e. the circuit board 150 is arranged in the tool body 110 perpendicularly to the first front surface 113 and the second front surface 114. Herein, the circuit board 150 can be arranged at the left side of the battery pack 140, or can be arranged at the right side of the battery pack 140, which is not limited in the present application.

[0117] As shown in FIG. 15, the horizontal projections of the motor 130, the battery 140 and the circuit board 150 in the horizontal plane do not overlap with each other, and the projections of the battery 140 and the circuit board 150 in the first plane parallel to the first straight line A and perpendicular to the horizontal plane at least partially overlap. Herein, the first plane can be regarded as the two second side surfaces 112. The motor 130, the battery 140 and the circuit board 150 are arranged separately and independently from each other, and in the up-down direction, the three do not overlap with each other. Alternatively, the motor 130, the circuit board 150 and the battery 140 can be arranged in the independent arrangement manner as shown in FIG. 15, or can be arranged in other independent arrangement manners, which is not limited in the present application.

[0118] In some embodiments, as shown in FIGS. 12 and 13, the front end of the tool body 110 is further provided with a lighting device 1101, so that the user can use the electric hexagonal wrench 100 in a dark environment. Optionally, the lighting device 1101 is an inductive lighting device, which automatically turns on when the brightness is low. Optionally, the lighting device 1101 is controlled by a switch, and the user controls the lighting or turns off the lighting according to needs. When the lighting device 1101 is controlled by a switch, the switch of the lighting device 1101 can be the switch of the electric hexagonal wrench 100, that is, when the electric hexagonal wrench 100 is started, the lighting device 1101 also turns on, and when the electric hexagonal wrench 100 is turned off, the lighting device 1101 turns off or delays for a period of time. The switch of the lighting device 1101 can also be independent of the switch of the electric hexagonal wrench 100, and the lighting device 1101 is controlled to turn on or off separately. Optionally, the lighting device 1101 can be an LED lamp. The LED lamp can be a single lamp bead as shown in FIG. 12, and the lighting device 1101 is single-point lighting. In addition, the LED lamp can also be a light bar as shown in FIGS. 19 and 20, or the LED lamp is still a single lamp bead, and a strip-shaped light-transmitting surface is arranged outside the single lamp bead, forming the structure shown in FIGS. 19 and 20, and the lighting device 1101 is surface lighting, which has a wider lighting range and better lighting effect. In addition, the lighting device 1101 can also be formed by other forms of lighting components, which are not limited in the present application. The lighting device 1101 can be arranged at the position as shown in FIGS. 12 and 19, or can be arranged at any position at the front end of the tool body 110 which is convenient for lighting, which is not limited in the present application.

[0119] In some embodiments, as shown in FIG. 14, the rear end of the tool body 110 is formed with a hanging hole 117, and a hanging rope can pass through the hanging hole 117, so that the user can hang the electric hexagonal wrench 100 for storage, etc., which is also convenient for the user to carry. The hanging hole 117 can also cooperate with other parts to hang the electric hexagonal wrench 100, which is not limited in the present application. In addition, the battery interface 141 can also be arranged at the rear end of the tool body 110, and the battery 140 is charged based on the battery interface 141 when the battery 140 is insufficient.

[0120] In some embodiments, the storage position M1 of the working head 120 is arranged in the holding portion of the tool body 110, so that when the working head 120 is in the storage position M1, it is in the holding portion of the electric hexagonal wrench 100 and does not protrude out of the tool body 110, so that the overall volume of the electric hexagonal wrench 100 is smaller, which is convenient for the user to carry and store. As shown in FIG. 16, the tool body 110 is provided with a receiving portion 115, which is arranged on the second front surface 114, and the working head 120 is in the receiving portion 115 when it is in the storage position M1.

[0121] In some embodiments, as shown in FIG. 17, the tool body 110 is further provided with a batch head storage part 116, which is arranged on the first front surface 113. A plurality of recesses are formed on the first front surface 113, which are respectively configured to accommodate a plurality of batch head rods 1201 of the replacement working head 120. The plurality of batch head rods 1201 are batch head rods 1201 of different sizes or shapes, and the plurality of batch head rods 1201 are accommodated in the batch head storage part 116 along the direction of the first straight line A. The batch head storage part 116 further comprises a detachable batch head fixing part 1161, which is configured to accommodate the plurality of batch head rods 1201 by clamping, so that the plurality of batch head rods 1201 are detachably assembled into the batch head fixing part 1161. Among them, the plurality of batch head fixing parts 1161 are the same size as the part clamped by the batch head fixing part 1161. In addition, as shown in FIGS. 19 and 20, the batch head storage part 116 can also be arranged on the second front surface 114. At this time, the batch head storage part 116 and the accommodating part 115 of the working head 120 are both located on the second front surface 114, and the first front surface 113 is a smooth plane. The following description of the present application is based on the batch head storage part 116 arranged on the first front surface 113. The structure and accommodating mode of the batch head storage part 116 arranged on the second front surface 114 are the same as those arranged on the first front surface 113. Therefore, the following description of the batch head storage part 116 on the first front surface 113 is also applicable to the description of the batch head storage part 116 on the second front surface 114, and the present application will not be repeated here.

[0122] The batch head fixing part 1161 is detachably connected to the two second side surfaces 112 on the left and right sides of the first front surface 113. As shown in FIGS. 16 and 18, the batch head fixing part 1161 is provided with a protruding part 1162 on the left and right sides, and the inside of the two second side surfaces 112 is provided with a clamping groove 1121 corresponding to the position of the protruding part 1162. The two protruding parts 1162 are respectively matched with the two clamping grooves 1121, so that the batch head fixing part 1161 is rotatably connected to the two second side surfaces 112. The batch head storage part 116 is further provided with a magnetic attraction part 1163, and the batch head fixing part 1161 is provided with an attraction part matched with the magnetic attraction part 1163. The present application does not limit the material of the attraction part, as long as it can be matched with the magnetic attraction part 1163 for adsorption or separation.

[0123] As shown in FIGS. 12-14, when the suction member on the bit holder 1161 is in cooperation with the magnetic suction member 1163 to be adsorbed, the bit holder 1161 is located in the bit storage part 116 as a whole, and at this time, the bit holder 1161 does not rotate relative to the first front surface 113. As shown in FIGS. 17 and 18, when the user needs to take out the bit rod 1201 from the bit holder 1161, the bit holder 1161 can be pulled upwards, the bit holder 1161 rotates relative to the first front surface 113, the suction member is separated from the magnetic suction member 1163 to be adsorbed, and the plurality of bit rods 1201 are no longer located in the bit storage part 116, so that the user can easily take the required bit rod 1201. Among them, the maximum angle of rotation of the bit holder 1161 relative to the first front surface 113 is 90 degrees as shown in FIG. 18. In addition, different bit holders 1161 can be configured with different sizes or different types of bits, for example, a group of bit holders 1161 are configured with all torx bits, and another group of bit holders 1161 are configured with all hexagonal bit rods 1201. Since the bit holder 1161 is detachably connected between the two second side surfaces 112, different bit holders 1161 can be replaced according to needs.

[0124] As shown in FIG. 13, at this time, the tool body 110 is still provided with an accessory storage position 1151, which is arranged on the rear side of the bit storage part 116 on the first front surface 113. The accessory storage position 1151 no longer stores the bit rod 1201, but stores a sleeve, one end of the sleeve matches the size of the outermost end of the bit rod 1201, that is, the sleeve matches the size of the outermost end of the working head 120. Among them, the other end of the sleeve which does not cooperate with the bit rod 1201 has a larger radial size, when the sleeve is sleeved on the outermost end of the working head 120, the radial size of the outermost end of the working head 120 combined with the sleeve is larger, so that the working head 120 has a wider range of application scenarios. At the same time, it is not necessary to newly set a bit rod 1201 with a large radial size, by setting a sleeve with a large radial size and a small axial length, a new bit rod 1201 can be formed by combining the sleeve with the working head 120, thereby saving the space of the electric hexagonal wrench 100. Optionally, the radial size of the other end of the sleeve which does not cooperate with the bit rod 1201 is 8 mm. In addition, other sizes can also be provided, which are not limited in the present application. In addition, when the bit storage part 116 is arranged on the second front surface 114, the accessory storage position 1151 can no longer be arranged, or the accessory storage position 1151 can still be arranged on the first front surface 113, or the accessory storage position 1151 is arranged on the second front surface 114, and the accessory storage position 1151 is arranged on the rear side of the bit storage part 116 on the second front surface 114.

[0125] In some embodiments, as shown in FIGS. 15 and 16, the two second sides 112 each include a portion protruding from the first side 111 in the front-rear direction, and the first side 111 and the two second sides 112 form a containing space in the front-rear direction, which is configured to accommodate the transmission assembly 200. The first side 111 is the side at the front of the electric hexagonal wrench 100. At this time, the electric hexagonal wrench 100 also includes a transmission fixing member 101, which is fixedly connected to the two second sides 112 based on the fixing member 1011.

[0126] In some embodiments, the work head 120 distributed at the front position of the first side 111 includes: the work head 120 is arranged on the transmission fixing member 101 to be distributed at the front position of the first side 111 at the front of the electric hexagonal wrench 100. As shown in FIG. 21, the work head 120 is also sleeved with a connecting member 121, and is sleeved on the transmission fixing member 101 based on the connecting member 121, so as to be rotatable relative to the transmission fixing member 101, and the position switching is the same as that of the previous embodiment of the present application, which will not be described here.

[0127] Since only one work head 120 is provided, a plurality of gear grooves 102 are arranged inside the second side 112 adjacent to the work head 120. As shown in FIG. 22, the plurality of gear grooves 102 are arranged in the same manner and structure as in the previous embodiment of the present application, which will not be described here. In the present embodiment, the plurality of gear grooves 102 are arranged inside the second side 112 at the left side of the electric hexagonal wrench 100. The inside of the connecting member 121 is also provided with an elastic element 1211 and a gear fixing member 1212. That is, the work head 120 is fixed at a certain angle in the working position M2 by cooperating with the gear groove 102 based on the connecting member 121, or the rotating manner is the same as that of the previous embodiment of the present application, which will not be described here.

[0128] As shown in FIG. 16, the outside of the transmission assembly 200 is provided with a protection member 2211, which surrounds the upper side, front side and lower side of the transmission assembly, that is, the protection member 2211 surrounds the transmission assembly 200 along the direction parallel to the first straight line A. As shown in FIGS. 16 and 17, in the left-right direction, a shielding limiting member 122 is also arranged between the work head 120 and the transmission assembly 200, and the shape of the shielding limiting member 122 is the same as that of the side of the transmission assembly 200 which is not protected by the protection member 2211, so that the shielding limiting member 122 can shield the side of the transmission assembly 200 and protect it.

[0129] The shielding and limiting part 122 is connected with the connecting part 121 and is driven to rotate by the connecting part 121. Alternatively, the shielding and limiting part 122 is integrally formed with the connecting part 121. Alternatively, the shielding and limiting part 122 is fixedly connected with the connecting part 121. Thus, when the working head 120 rotates, the working head 120 drives the connecting part 121 to rotate, and then drives the shielding and limiting part 122 to synchronously rotate.

[0130] As shown in FIG. 23, the shielding and limiting part 122 comprises a limiting protruding part 1221. As shown in FIG. 24, the protection part 2211 comprises a plurality of limiting recesses 2212 on the side close to the shielding and limiting part 122, and the limiting recesses 2212 are matched with the limiting protruding part 1221. The limiting protruding part 1221 can be switched from one limiting recess 2212 to another limiting recess 2212, and can continuously switch to rotate until reaching the required angle. FIG. 25A is a schematic view of the matching of the limiting protruding part 1221 and the limiting recess 2212, at this time the working head 120 is fixedly kept still based on the matching of the two. FIG. 25B is a schematic view of the disengagement of the matching of the limiting protruding part 1221 and the limiting recess 2212, that is, the working head 120 is in a rotatable state. In this embodiment, the plurality of limiting recesses 2212 are taken as three limiting recesses 2212 as an example, and the working position M2 of the working head 120 comprises three working positions. In addition, the plurality of limiting recesses 2212 can also be other numbers, and the number of the working positions M2 of the working head 120 is the same as the number of the plurality of limiting recesses 2212.

[0131] The setting positions of the plurality of limiting recesses 2212 correspond to the setting positions of the plurality of gear grooves 102, and the number of the plurality of limiting recesses 2212 is the same as the number of the plurality of gear grooves 102. When the working head 120 is kept still at the working position M2, for the left side of the working head 120, the elastic element 1211 presses the gear fixing part 1212 against the gear groove 102; for the right side of the working head 120, the limiting protruding part 1221 is clamped in the limiting recess 2212. When the working head 120 rotates to another working position M2, the gear fixing part 1212 disengages from the current gear groove 102 and switches to another gear groove 102, the elastic element 1211 again presses the gear fixing part 1212 against the gear groove 102, the limiting protruding part 1221 disengages from the currently matched limiting recess 2212 and switches to another limiting recess 2212 and is clamped in the limiting recess 2212. Thus, when the working head 120 rotates to the working position M2 and is fixedly kept still, the left and right sides of the working head 120 are both fixed by the parts, which further enhances the stability of the working head 120 working at the working position M2.

[0132] In addition, the inner end of the outermost side of the accommodating portion 115 corresponding to the working head 120 is also provided with a boss 1152, so that the working head 120 is kept stationary in the accommodating portion 115, which is the same as the previous embodiment of the present application, and will not be described here again.

[0133] The transmission assembly 200 is arranged between the working head 120 and the motor 130. Since only one working head 120 is arranged in the present embodiment, only one of the second gear 222 and the third gear 223 is arranged in the second member 220 of the transmission assembly 200. The third gear 223 is taken as an example for description in the present embodiment, and the third gear 223 is arranged on the left side of the first gear 221. The transmission relationship between the first gear 221, the third gear 223, the first member 210 and the transmission wheel set 230 is the same as that of the previous embodiment of the present application, and will not be described here again.

[0134] As shown in FIGS. 16, 21 and 26, the transmission assembly 200 further comprises a third member 240 arranged between the motor output shaft 131 and the second member 220, so that the second member 220 is indirectly engaged with the motor output shaft 131 to transmit the rotation of the motor output shaft 131 to the second member 220. The third member 240 comprises a fourth gear 241 and a fifth gear 242. The fourth gear 241 is engaged with the motor teeth 132 on the end of the protruding portion of the motor output shaft 131. The rotation of the motor output shaft 131 drives the motor teeth 132 to rotate, and in turn, the motor teeth 132 drive the fourth gear 241 engaged therewith to rotate. The fourth gear 241 and the fifth gear 242 are coaxially arranged along the front-rear direction. The fourth gear 241 and the fifth gear 242 are both sleeved on a connecting shaft 243. The fifth gear 242 is arranged in front of the fourth gear 241. The rotation of the fourth gear 241 drives the connecting shaft 243 to rotate, and in turn, the connecting shaft 243 drives the fifth gear 242 sleeved thereon to rotate. The fifth gear 242 is engaged with the first gear 221. The rotation of the fifth gear 242 drives the first gear 221 to rotate, and in turn, the first gear 221 drives the third gear 223 to rotate, and in turn, drives the subsequent parts to rotate, so that the working head 120 can be driven to rotate by the motor 130. That is, compared with the above-mentioned embodiments, the third member 240 is newly added between the motor teeth 132 and the first gear 221 in the present embodiment, and one level of transmission is added, so that the torque output by the motor 130 is increased, and the output torque of the working head 120 can be increased to less than or equal to 2.5 N·m. In addition, the third member 240 can also be newly added to the multiple working heads 120 in the above-mentioned embodiments to improve the output torque of the working head 120.

[0135] In some embodiments, as shown in FIG. 16, FIG. 21, FIG. 26 and FIG. 27, the electric hexagonal wrench 100 further comprises a fixing assembly 180, which comprises a first fixing assembly 181 and a second fixing assembly 182. In the front-rear direction, the fixing assembly 180 is arranged between the working head 120 and the motor 130, and the first fixing assembly 181 is arranged in front of the second fixing assembly 182. The projection of the first fixing assembly 181 on the horizontal plane is approximately L-shaped, and the projection of the second fixing assembly 182 on the horizontal plane is rectangular. The first fixing assembly 181 comprises a first part 1811 arranged almost along the front-rear direction, and a second part 1812 arranged almost along the left-right direction. The first fixing assembly 181 is fixedly connected to the front end face of the second fixing assembly 182 by a fixing member 1813, and the second part 1812 of the first fixing assembly 181 is fixedly connected to the front end face of the second fixing assembly 182 by the fixing member 1813. The second fixing assembly 182 is also fixedly connected to the front end face of the motor 130 by the fixing member 1813. Optionally, the fixing member 1813 can be a screw. In addition, the fixing member 1813 can also be other parts that can play a fixing role, which is not limited in the present application.

[0136] The upper and lower faces of the second fixing assembly 182 are hollow, and the rear end face of the second fixing assembly 182 is provided with a first hole 1821 matched with the motor output shaft 131 of the motor 130, configured to pass through the motor gear 132 on the motor output shaft 131, and the motor gear 132 is located inside the second fixing assembly 182, so that the fourth gear 241 engaged with the motor gear 132 is also located inside the second fixing assembly 182. The front end face of the second fixing assembly 182 is provided with a second hole 1822, and the second part 1812 fixedly connected to the front end face of the second fixing assembly 182 is also provided with a third hole 1814 coaxially arranged with the same shape and size as the second hole 1822. The connecting shaft 243 passes through the second hole 1822 and the third hole 1814, so that the fifth gear 242 can be located in front of the second part 1812 and engaged with the first gear 221.

[0137] The second fixing assembly 182 fixed on the front end surface of the motor 130 is arranged, so that the motor teeth 132 on the motor output shaft 131 are limited in the first hole 1821, which guarantees the stability of the engagement between the motor teeth 132 and the fourth gear 241, and avoids the disadvantages that the motor teeth 132 are shaken by the motor output shaft 131 during the operation of the motor 130, and the stability of the engagement between the motor teeth 132 and the fourth gear 241 is not enough. The first fixing assembly 181 is fixedly connected to the front end surface of the second fixing assembly 182, which avoids the disadvantages that the fifth gear 242 is shaken by the connecting shaft 243, and improves the stability of the engagement between the fifth gear 242 and the first gear 221. Therefore, by arranging the fixing assembly 180, the stability of the working head 120 of the electric hexagonal wrench 100 during operation is improved, and at the same time, due to the improvement of the stability, the noise of the cooperation and transmission of multiple parts is greatly reduced.

[0138] The electric hexagonal wrench 100 with a single working head 120 shown in FIGS. 12-27 also includes a switch piece 160 and a power display device 170, and the structure and function of the switch piece 160 and the power display device 170 are the same as those of the above-mentioned embodiments, which will not be described here.

[0139] It should be noted that the various embodiments described above and their specific embodiments can be combined with each other as long as their characteristics do not conflict, so as to comprehensively optimize the structure of the electric hexagonal wrench in the present application, so as to reduce the time of fastening or disassembling fasteners, and improve the convenience of user operation.

[0140] In some embodiments, the electric hexagonal wrench 100 can also have the structure shown in FIG. 28. As shown in FIG. 28, the electric hexagonal wrench 100 is in the form of a six-sided box, and the electric hexagonal wrench 100 extends along a first straight line A, which is a straight line extending in the front-rear direction. The electric hexagonal wrench 100 includes a first face 311 and a second face 312, which are two faces corresponding to each other in the up-down direction. The electric hexagonal wrench 100 also includes two first side faces 313 and two second side faces 314, the two first side faces 313 being two side faces opposite to each other in the front-rear direction, and the two second side faces 314 being two side faces opposite to each other in the left-right direction.

[0141] As shown in FIG. 29, the motor 130 and the power supply assembly 140 are arranged inside the electric hexagonal wrench 100, the axis of the motor output shaft 131 of the motor 130 coincides with the first straight line A, and the motor output shaft 131 only includes one output end, which is configured to drive the transmission assembly 320 of the electric hexagonal wrench 100.

[0142] As shown in FIGS. 28 and 29, the electric hexagonal wrench 100 comprises a plurality of working heads 120, and the working heads 120 comprise a storage state and a working state. Optionally, the plurality of working heads 120 can be working heads of different models and different sizes. When the working heads 120 are in the storage state, the working heads 120 are in a storage position, and the plurality of working heads 120 are arranged in sequence on the first face 311 or the second face 312 in a direction perpendicular to the first straight line A, at this time, the accommodating portion 115 is a cuboid accommodating portion, and the plurality of working heads 120 can be accommodated simultaneously. When the working heads 120 are in the working state, the working heads 120 are in a working position, and the working heads 120 are rotated away from the storage position, and the working heads 120 are rotated to be perpendicular to the first face 311 or the second face 312. Among them, when one working head 120 is in the working position, the other working heads 120 can be in the working position or the storage position, and each working head 120 is independent of each other and does not interfere.

[0143] As shown in FIGS. 28 and 29, each working head 120 comprises a connecting piece 121, and the electric hexagonal wrench 100 further comprises a connecting shaft 315, and the plurality of connecting pieces 121 are sleeved on the connecting shaft 315, so that the working heads 120 can rotate relative to the connecting shaft 315. As shown in FIG. 28, the other side of the connecting piece 121 corresponding to the working head 120 is provided with a connecting transmission piece 1213, and the connecting transmission piece 1213 changes position with the rotation of the working head 120. For example, when the working head 120 is in the storage position, the connecting transmission piece 1213 abuts against the second side face 314, and when the working head 120 is rotated 90° to the working position, the connecting transmission piece 1213 rotates with it, at this time, the connecting transmission piece 1213 is away from the second side face 314 and abuts against the first face 311 or the second face 312. Among them, the connecting transmission piece 1213 can be a gear as shown in FIG. 28.

[0144] As shown in FIG. 29, the transmission assembly 320 comprises a first transmission piece 321 and a second transmission piece 322, the first transmission piece 321 is arranged inside the electric hexagonal wrench 100 and connected with the motor output shaft 131, and the rotation of the motor output shaft 131 drives the rotation of the first transmission piece 321. The second transmission piece 322 comprises a worm 3221 and a worm transmission piece 3222 arranged at one end of the worm 3221. Optionally, the worm 3221 and the worm transmission piece 3222 are integrally formed. Optionally, the worm 3221 and the worm transmission piece 3222 are formed separately, and the worm transmission piece 3222 is fixedly connected to the worm 3221. The worm transmission piece 3222 is engaged with the first transmission piece 321, and the rotation of the first transmission piece 321 can drive the rotation of the worm transmission piece 3222, and since the worm transmission piece 3222 is fixedly connected with the worm 3221, the worm transmission piece 3222 drives the rotation of the worm 3221. Optionally, the first transmission piece 321 is a gear. Optionally, the worm transmission piece 3222 is a gear.

[0145] When the working head 120 is in the working position, the connecting transmission member 1213 is coupled with the worm 3221, so that the rotation of the motor 130 drives the worm 3221 to rotate, and then drives the connecting transmission member 1213 to rotate, so that the working head 120 can rotate to work. When the working head 120 is in the storage position, the connecting transmission member 1213 is not in contact with the worm 3221, so that even if the motor 130 rotates, the working head 120 will not rotate.

[0146] The above shows and describes 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, and any technical solutions obtained by equivalent replacement or equivalent transformation fall within the protection scope of the present application.

Claims

1. A power tool, comprising: a tool body configured as a holding portion for a user to hold; a motor including a motor output shaft rotating about a driving axis; a battery for powering the motor; at least one working head configured to be driven by the motor; the working head having two selectable positions on the tool body, a storage position in a storage state and a working position in a working state; wherein the storage position is arranged within the holding portion.

2. The power tool of claim 1, wherein, a receiving portion is arranged on the tool body corresponding to each working head.

3. The power tool of claim 1, further comprising a transmission assembly arranged between the motor and the working head to transmit the rotational power of the motor to the working head; the transmission assembly comprising a first member; the first member is operable to be decoupled from a second member to allow the working head to be stored to the storage position; the working head is in the working position when the first member is coupled with the second member.

4. The power tool of claim 3, wherein the transmission assembly further comprises a transmission wheel set arranged to be coupled between the first member and the working head, the first member is configured to rotate the transmission wheel set; the second member is fixedly arranged on a transmission fixing member, directly or indirectly engaged with the motor output shaft to transmit the rotation of the motor output shaft.

5. The power tool of claim 4, wherein the transmission assembly further comprises a third member arranged between the motor output shaft and the second member to transmit the rotation of the motor output shaft to the second member.

6. The power tool of claim 3, wherein the transmission wheel set further comprises a worm and a worm wheel; the worm is rotated by the first member, the worm wheel is engaged with the worm to be rotated by the worm; the working head is rotated with the worm wheel.

7. The power tool of claim 6, wherein, a self-locking is formed between the worm wheel and the worm; the working head in the working position can be manually operated to work on a workpiece when the motor is not started.

8. The power tool of claim 4, wherein, the working head can rotate about the transmission fixing member when the working head is in the working position; the rotation angle of the working head is 0-180°.

9. The power tool of claim 1, wherein, a chuck storage portion is further arranged on the tool body, the chuck storage portion is configured to accommodate a plurality of chuck rods replacing the working head, the plurality of chuck rods are detachably assembled into a chuck fixing member.

10. The power tool of claim 9, wherein, the chuck fixing member comprises a protrusion portion matched with a clamping groove on the tool body, the chuck fixing member is rotatably and detachably connected to the tool body.

11. The power tool of claim 1, further comprising a fixing assembly arranged between the working head and the motor in a front-rear direction; the fixing assembly comprises a first fixing assembly and a second fixing assembly, the first fixing assembly is fixedly connected to the second fixing assembly, the second fixing assembly is fixedly connected to the motor.

12. The power tool of claim 1, wherein, the output torque of the working head is less than or equal to 2.5 N·m.

13. The power tool of claim 1, wherein, the outer diameter of the motor is greater than or equal to 15 mm and less than or equal to 30 mm.

14. The power tool of claim 1, wherein, The tool body extends along a first straight line. In a width direction perpendicular to the first straight line, the width of the tool body is less than or equal to 60 mm, and in a height direction perpendicular to the first straight line, the height of the tool body is less than or equal to 45 mm.

15. The power tool of claim 1, wherein, The maximum rotating speed of the motor is less than or equal to 30,000 rpm.

16. A fastening device, comprising: a tool body extending along a first straight line; a motor disposed in the tool body, including a motor output shaft rotating around a driving axis; at least one working head configured to be driven by the motor; the working head has a storage position in a storage state and a working position in a working state on the tool body; wherein, in the direction of the first straight line, the length of the tool body is less than or equal to 150 mm.

17. A handheld electric power tool, comprising: a tool body for a user to hold; a motor including a motor output shaft rotating around a driving axis; a battery for powering the motor; a plurality of working heads configured to be driven by the motor, the working heads having two selectable states of a storage state and a working state; wherein, in the case that one working head is in the working state, the other working heads have two choices of being in the storage state and the working state.

18. The hand-held power tool of claim 17, wherein, The working head is in a storage position in the storage state, and the working head is in a working position in the working state, and the working head is configured to be switched between the working position and the storage position.

19. The hand-held power tool of claim 17, wherein, The tool body extends along a first straight line, and the plurality of working heads are distributed in a front position of at least one first side surface perpendicular to the first straight line.

20. The hand-held power tool of claim 17, further comprising a transmission assembly disposed between the motor and the working head to transmit rotational power of the motor to the working head; wherein, The working head is detachably mounted on the transmission assembly.

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