Power tool

Abstract

A power tool, comprising: a housing (110), formed to have or connected to a gripping portion configured to be gripped; a motor (120), comprising a drive shaft (121) rotating around a first axis; a clutch assembly (200), driven by the drive shaft (121); and a transmission assembly (130), connected to the motor (120) and the clutch assembly (200). The clutch assembly (200) comprises a first shaft locking assembly (210), a second shaft locking assembly (220), a transmission shaft (240), and an output shaft (230). The output shaft (230) comprises a first output shaft (231), the first shaft locking assembly (210) is sleeved on the transmission shaft (240) and the first output shaft (231), and the second shaft locking assembly (220) is connected to the transmission assembly (130) and the first shaft locking assembly (210). When the drive shaft (121) remains stationary and the first output shaft (231) rotates in a first direction, the first shaft locking assembly (210) prevents the transmission shaft (240) from rotating, and the transmission shaft (240) remains stationary. When the drive shaft (121) remains stationary and the first output shaft (231) rotates in a second direction, the first shaft locking assembly (210) drives the transmission shaft (240) to rotate in the second direction, and the second shaft locking assembly (220) prevents the transmission shaft (240) and the first output shaft (231) from rotating. In the power tool, a fastener can be implemented so as not to rotate in a following manner during a return stroke.

Description

power tools

[0001] This application claims priority to Chinese Patent Application No. 202411216321.5, filed with the Chinese Patent Office on August 29, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of tool technology, specifically to an electric tool. Background Technology

[0003] Power tools, such as power wrenches, are configured to apply torque to fasteners to tighten or loosen them. Power wrenches use a motor to tighten or loosen fasteners; when the power supply to the power wrench is insufficient to drive the motor, the user needs to swing the handle to transmit the rotational torque.

[0004] To tighten fasteners, the user swings the handle, which includes both the tightening process and the return stroke in the opposite direction. Similarly, to loosen fasteners, the user swings the handle, which includes both the loosening process and the return stroke in the opposite direction. During the return stroke, the electric wrench rotates the fastener.

[0005] This section provides background information related to this application, which is not necessarily related to the technology. Summary of the Invention

[0006] This application addresses or at least mitigates some or all of the aforementioned problems. To this end, this application provides a power tool in which the fastener does not rotate during the return stroke.

[0007] To achieve the above objectives, this application adopts the following technical solution:

[0008] One embodiment provides a power tool, including: a housing having a grip portion configured for holding; a motor including a drive shaft rotating about a first axis; a clutch assembly driven by the drive shaft; and a transmission assembly connecting the motor and the clutch assembly. The clutch assembly includes a first shaft locking assembly, a second shaft locking assembly, a drive shaft, and an output shaft. The output shaft includes a first output shaft. The first shaft locking assembly is sleeved on the drive shaft and the first output shaft and configured to transmit torque from the drive shaft to the output shaft. The second shaft locking assembly connects the transmission assembly and the first shaft locking assembly and is configured to transmit torque from the transmission assembly to the first shaft locking assembly. When the drive shaft remains stationary and the first output shaft rotates in a first direction, the first shaft locking assembly prevents the drive shaft from rotating, and the drive shaft remains stationary. When the drive shaft remains stationary and the first output shaft rotates in a second direction, the first shaft locking assembly drives the drive shaft to rotate in the second direction, and the second shaft locking assembly prevents the drive shaft and the first output shaft from rotating. The second direction is opposite to the first direction.

[0009] In some embodiments, the output shaft further includes a second output shaft, the first output shaft rotates along a first axis, the second output shaft rotates about a second axis, and the first axis intersects the second axis.

[0010] In some embodiments, the first shaft lock assembly includes a first shaft lock ring and a reversing wheel. The first end of the first shaft lock ring is sleeved on the first output shaft, and the second end of the first shaft lock ring cooperates with the reversing wheel, which is sleeved on the drive shaft.

[0011] In some embodiments, the first shaft lock assembly further includes a friction element and a pressing element, one side of the friction element contacting the reversing wheel and the other side of the friction element contacting the pressing element.

[0012] In some embodiments, when the first output shaft rotates along a first direction, the first output shaft drives the first shaft locking ring to rotate, and the friction element prevents the first shaft locking ring from driving the reversing wheel to rotate, so that the reversing wheel remains stationary to prevent the drive shaft from rotating.

[0013] In some embodiments, a protrusion is formed on the side of the reversing wheel away from the first shaft locking ring, and the first shaft locking assembly further includes a stop component, which is sleeved on the outer ring of the protrusion; when the output shaft rotates along the first direction, the stop component prevents the first shaft locking ring from driving the reversing wheel to rotate.

[0014] In some embodiments, the protrusion is a gear-shaped protrusion; the stop assembly includes a stop ball, a bushing, an elastic element and a limiting ring, the bushing includes a hole, the stop ball passes through the hole and abuts against the protrusion, the elastic element passes through the hole and abuts against the stop ball, and the limiting ring is disposed on the outer ring of the bushing and abuts against the elastic element.

[0015] In some embodiments, the stop assembly includes a stop ring, the stop ring including a plurality of stop portions protruding inwards, the stop portions abutting against the protrusions.

[0016] In some embodiments, the protrusion is a smooth annular protrusion, and the stop is made of a flexible rubber material.

[0017] In some embodiments, the portion of the first shaft locking ring that contacts the reversing wheel forms an accommodating space, and the drive shaft includes a portion located within the accommodating space.

[0018] In some embodiments, the first shaft lock assembly further includes a plurality of locking pins and a plurality of levers, the plurality of levers being fixedly connected to the reversing wheel, the plurality of locking pins and the plurality of levers being arranged around the drive shaft within the accommodating space, and the plurality of locking pins and the plurality of levers being spaced apart.

[0019] In some embodiments, when the first output shaft rotates along the first direction, a plurality of locking pins rotate along the first direction, and the accommodating space of the plurality of locking pins increases so that the plurality of locking pins do not contact the drive shaft.

[0020] In some embodiments, the second shaft lock assembly includes a second shaft lock ring, which is fixedly disposed within the housing.

[0021] In some embodiments, when the drive shaft remains stationary and the first output shaft rotates along the second direction, the plurality of locking pins rotate along the second direction, and the accommodating space of the plurality of locking pins decreases so that the plurality of locking pins contact the drive shaft and the first shaft locking ring, thereby driving the drive shaft to rotate along the second direction.

[0022] In some embodiments, when the drive shaft rotates in the second direction, the second shaft locking assembly prevents the drive shaft from rotating continuously.

[0023] In some embodiments, a power tool includes: a housing having a grip portion configured for holding; a motor including a drive shaft rotating about a first axis; a clutch assembly driven by the drive shaft; and a transmission assembly connecting the motor and the clutch assembly. The clutch assembly includes a first shaft locking assembly, a second shaft locking assembly, a drive shaft, and an output shaft. The output shaft includes a first output shaft. The second shaft locking assembly connects the transmission assembly and the first shaft locking assembly. The first shaft locking assembly is sleeved on the drive shaft and the first output shaft. When the drive shaft remains stationary and the first output shaft and the drive shaft are disengaged, the first output shaft rotates relative to the drive shaft in a first direction. When the drive shaft remains stationary and the first output shaft and the drive shaft are engaged, the first output shaft and the drive shaft rotate synchronously in a second direction, and the second shaft locking assembly prevents the drive shaft and the first output shaft from rotating. The second direction is opposite to the first direction.

[0024] In some embodiments, a power tool includes: a housing having a grip portion configured for holding; a motor including a drive shaft rotatable about a first axis; a clutch assembly driven by the drive shaft; and a transmission assembly connecting the motor and the clutch assembly. The clutch assembly includes a first shaft locking assembly, a second shaft locking assembly, a drive shaft, and an output shaft. The second shaft locking assembly connects the transmission assembly and the first shaft locking assembly, and the first shaft locking assembly is sleeved on the drive shaft and the output shaft. The output shaft includes a first output shaft and a second output shaft. The first shaft locking assembly is sleeved on the drive shaft and the first output shaft and configured to transmit torque from the drive shaft to the first output shaft, and the first output shaft transmits torque to the second output shaft. When the drive shaft remains stationary and the output shaft and the drive shaft are disengaged, the first output shaft rotates relative to the second output shaft along a first direction.

[0025] In some embodiments, the first output shaft rotates about a first axis, the second output shaft rotates about a second axis, and the first axis intersects the second axis.

[0026] In some embodiments, when the drive shaft remains stationary and the output shaft and transmission shaft are in a engaged state, the first output shaft drives the second output shaft to rotate along the first direction.

[0027] In some embodiments, the second output shaft includes a clamping portion configured to clamp working attachments that perform different functions.

[0028] In some embodiments, a power tool includes: a housing having a grip portion configured for holding; a motor including a drive shaft rotating about a first axis; a power supply assembly for supplying power to the motor; a clutch assembly driven by the drive shaft; and a transmission assembly connecting the motor and the clutch assembly. The clutch assembly includes a first shaft locking assembly, a second shaft locking assembly, a drive shaft, and an output shaft. The first shaft locking assembly is sleeved on the drive shaft and the output shaft and is configured to transmit torque from the drive shaft to the output shaft. The second shaft locking assembly connects the transmission assembly and the first shaft locking assembly and is configured to transmit torque from the transmission assembly to the first shaft locking assembly. When the transmission assembly is driven to rotate by the drive shaft, the transmission assembly drives the second shaft locking assembly to rotate, the second shaft locking assembly drives the first shaft locking assembly to rotate, and the first shaft locking assembly drives the output shaft to rotate continuously.

[0029] In some embodiments, the output shaft includes a first output shaft and a second output shaft, the first output shaft rotating about a first axis, the second output shaft rotating about a second axis, and the first axis intersecting the second axis.

[0030] In some embodiments, the first shaft lock assembly includes a first shaft lock ring and a reversing wheel. The first end of the first shaft lock ring is sleeved on the first output shaft, and the second end of the first shaft lock ring cooperates with the reversing wheel, which is sleeved on the drive shaft.

[0031] In some embodiments, the first shaft lock assembly further includes a plurality of locking posts surrounding the drive shaft and disposed between the drive shaft and the first shaft lock ring.

[0032] In some embodiments, when the second shaft lock assembly drives the drive shaft to rotate, the drive shaft drives the first shaft lock ring to rotate based on a plurality of locking pins, the first shaft lock ring drives the first output shaft to rotate, and the first output shaft drives the second output shaft to rotate synchronously.

[0033] In some embodiments, a plurality of paddles are formed on the side of the reversing wheel near the first shaft locking ring, and the plurality of paddles are arranged around the drive shaft and between the drive shaft and the first shaft locking ring.

[0034] In some embodiments, when the drive shaft rotates, the drive shaft drives the first shaft locking ring to rotate based on multiple locking pins and multiple levers. The first shaft locking ring drives the first output shaft to rotate, and the first output shaft drives the second output shaft to rotate synchronously.

[0035] In some embodiments, the power tool further includes a controller configured to control the motor; the controller is configured to control the drive shaft to stop rotating continuously when the power of the power supply component is lower than a preset threshold.

[0036] In some embodiments, the power tool further includes a forward switch and a reverse switch, wherein when the forward switch or the reverse switch is triggered, the controller controls the motor to drive the power tool into a manual working mode.

[0037] In some embodiments, when the power tool is in manual operating mode, the following is included: when the first output shaft rotates along a first direction, the drive shaft remains stationary; when the first output shaft rotates along a second direction, the drive shaft prevents the output shaft from rotating continuously.

[0038] In some embodiments, a power tool includes: a housing having a grip portion configured for holding; a motor including a drive shaft rotatable about a first axis; a clutch assembly driven by the drive shaft; and a transmission assembly connecting the motor and the clutch assembly. The clutch assembly includes a first shaft locking assembly, a second shaft locking assembly, a drive shaft, and an output shaft. The first shaft locking assembly is sleeved on the drive shaft and the output shaft and configured to transmit torque from the drive shaft to the output shaft. The second shaft locking assembly connects the transmission assembly and the first shaft locking assembly and is configured to transmit torque from the transmission assembly to the first shaft locking assembly. In a direction perpendicular to the first axis, the width of the power tool is less than or equal to 50 mm.

[0039] In some embodiments, the transmission assembly includes an internal gear ring that contacts the housing.

[0040] In some embodiments, the power tool includes a circuit board configured to control the operation of the power tool, the circuit board being disposed parallel to a vertical plane containing the first axis.

[0041] In some embodiments, the length of the power tool is less than or equal to 300 mm in a direction parallel to the first axis.

[0042] In some embodiments, the power tool includes a lighting assembly disposed at the head of the power tool, the head being connected to the grip portion.

[0043] In some embodiments, the housing includes a grip housing and a head housing, wherein the grip can be fixedly mounted to the head housing.

[0044] In some embodiments, the housing includes a first housing and a second housing parallel to the plane containing the first axis, and the first housing and the second housing are fixedly installed together.

[0045] In some embodiments, the power tool includes a switch assembly disposed on a grip portion, the switch assembly being connected to a circuit board, and the connection line between the switch assembly and the circuit board including at least a portion intersecting a first axis.

[0046] In some embodiments, the output shaft includes a first output shaft and a second output shaft, the first output shaft rotating about a first axis, the second output shaft rotating about a second axis, and the first axis intersecting the second axis.

[0047] In some embodiments, the second output shaft includes a clamping portion configured to clamp working attachments that perform different functions.

[0048] In some embodiments, a power tool includes: a housing having a grip portion configured for holding; a motor including a drive shaft rotating about a first axis; a clutch assembly driven by the drive shaft; a transmission assembly connecting the motor and the clutch assembly; and a power supply assembly supplying power to the motor. The clutch assembly includes a first shaft locking assembly, a drive shaft, and an output shaft, the first shaft locking assembly being sleeved on the drive shaft and the output shaft and configured to transmit torque from the drive shaft to the output shaft. The power tool also includes a reversing member disposed on the grip portion, in contact with the first shaft locking assembly, and configured to operate the power tool when the power supply assembly cannot drive the motor to rotate.

[0049] In some embodiments, the power tool further includes a switch assembly comprising a forward switch and a reverse switch, the forward switch and the reverse switch being disposed on the upper side of the commutator.

[0050] In some embodiments, the commutator includes a first opening and a second opening. When the commutator is in a first position, the first opening corresponds to the forward switch and the second opening corresponds to the reverse switch.

[0051] In some embodiments, when the power supply component has sufficient power, the forward switch is pressed to start and passes through the first opening, or the reverse switch is pressed to start and passes through the second opening.

[0052] In some embodiments, when the power supply component fails to drive the motor to rotate, the commutator is pushed to a second position, and the commutator blocks the forward or reverse switch from being pressed to start.

[0053] In some embodiments, the reversing member includes a first position and a second position, wherein when the reversing member is pushed from the first position to the second position, the reversing member drives the power tool to operate based on the first shaft locking assembly.

[0054] In some embodiments, the first shaft lock assembly includes a reversing wheel, a reversing member contacts the reversing wheel, and the reversing member drives the reversing wheel to rotate when the reversing member is pushed from a first position to a second position.

[0055] In some embodiments, the first shaft lock assembly further includes a friction element and a pressing element, one side of the friction element contacting the reversing wheel and the other side of the friction element contacting the pressing element.

[0056] In some embodiments, the switching assembly further includes a switching friction element disposed between the commutator and the first shaft lock assembly.

[0057] In some embodiments, a forward switch spring is provided inside the forward switch, and a reverse switch spring is provided inside the reverse switch. Attached Figure Description

[0058] Figure 1 is a perspective view of an embodiment of an electric wrench;

[0059] Figure 2 is an internal side view of the electric wrench in Figure 1;

[0060] Figure 3 is a side view of the first shaft lock assembly in Figure 2;

[0061] Figure 4 is an exploded view of the first axis lock assembly in Figure 2;

[0062] Figure 5A is an exploded view of a reversing wheel forming a gear-shaped protrusion and a first shaft lock assembly including a stop assembly in one embodiment.

[0063] Figure 5B is a three-dimensional view of the reversing wheel in Figure 5A;

[0064] Figure 5C is a schematic diagram of the engagement between the stop assembly and the reversing wheel in Figure 5A;

[0065] Figure 5D is a side view of the first shaft lock assembly in Figure 5A;

[0066] Figure 6A is an exploded view of a reversing wheel forming a smooth annular protrusion and a first shaft lock assembly including a stop assembly in one embodiment.

[0067] Figure 6B is a three-dimensional view of the reversing wheel in Figure 6A;

[0068] Figure 6C is a schematic diagram of the engagement between the stop assembly and the reversing wheel in Figure 6A;

[0069] Figure 6D is a side view of the first shaft lock assembly in Figure 6A;

[0070] Figure 7 is a side view of the output shaft in Figure 1;

[0071] Figure 8 is a perspective view of the second output shaft in Figure 7;

[0072] Figure 9 is a cross-sectional view of the second shaft lock assembly in Figure 2;

[0073] Figure 10 is an exploded view of the second shaft lock assembly in Figure 2;

[0074] Figure 11 is a rear view of the first shaft locking ring, locking pin, lever, and drive shaft during manual return in one embodiment;

[0075] Figure 12 is a rear view of the first shaft locking ring, locking pin, toggle block, and drive shaft during manual operation according to an embodiment;

[0076] Figure 13 is a rear view of the first shaft locking ring, locking pin, lever, and drive shaft in an electric operating mode according to an embodiment.

[0077] Figure 14 is a perspective view of an embodiment of an electric wrench including a switch assembly;

[0078] Figure 15 is a perspective view of an embodiment of an electric wrench including a switch assembly and a reversing element;

[0079] Figure 16 is a perspective view of the commutator in Figure 15;

[0080] Figure 17 is a front view of the commutator in Figure 15;

[0081] Figure 18 is a side view of the housing according to an embodiment;

[0082] Figure 19 is a top view of the casing of one embodiment;

[0083] Figure 20 is an internal top view of the electric wrench in Figure 1;

[0084] Figure 21 is a perspective view of an embodiment of an electric wrench including a lighting assembly;

[0085] Figure 22 is a top view of an embodiment of an electric wrench without a front housing;

[0086] Figure 23 is a top view of an embodiment of an electric wrench including only the first output shaft. Detailed Implementation

[0087] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0088] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0089] In this application, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.

[0090] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0091] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0092] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0093] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0094] In this application, the terms "controller," "processor," "central processing unit," "CPU," and "MCU" are used interchangeably. When using the unit "controller," "processor," "central processing unit," "CPU," or "MCU" to perform a specific function, unless otherwise stated, these functions may be performed by a single or multiple of the aforementioned units.

[0095] In this application, the terms "device," "module," or "unit" are used to describe devices that can be implemented in hardware or software to perform a specific function.

[0096] In this application, the terms “calculation,” “judgment,” “control,” “determine,” “identify,” etc., refer to the operation and process of a computer system or similar electronic computing device (e.g., controller, processor, etc.).

[0097] The power tools applicable to the technical solutions of this application include handheld power tools, fastening power tools, etc., such as power wrenches, screwdrivers, etc. Other types of power tools can fall within the protection scope of this application as long as they can adopt the substantive content of the technical solutions disclosed below.

[0098] This application uses an electric wrench as an example to illustrate its application. In manual mode, the user needs to reciprocate the wrench's grip to tighten or loosen fasteners. This reciprocating motion includes forward and return strokes. The forward stroke is in the same direction as the user's intended action; for example, if tightening a fastener is required, the forward stroke is the tightening direction. The return stroke is in the opposite direction to the forward stroke, opposite to the user's intended action. Taking tightening a fastener as an example, in manual mode, the wrench tightens the fastener during the forward stroke, but during the return stroke, if the wrench remains in contact with the fastener, it will cause the fastener to rotate, loosening it. Therefore, this application proposes an electric wrench in manual mode where, during the return stroke, the wrench remains in contact with the fastener, and the fastener does not rotate.

[0099] Figures 1 and 2 illustrate an embodiment of an electric wrench 100 of this application. To clearly illustrate the technical solution of this application, the upper side, lower side, front side, and rear side shown in Figures 1 and 2 are also defined. As shown in Figures 1 and 2, the electric wrench 100 includes a housing 110, a motor 120, a transmission assembly 130, a power supply assembly 140, and a clutch assembly 200. The power supply assembly 140, motor 120, transmission assembly 130, and clutch assembly 200 are arranged sequentially from back to front within the housing 110 of the electric wrench 100. The housing 110 extends substantially parallel to a first axis A, and a grip portion configured for holding is formed or connected to the housing 110 for use by a user. The motor 120 includes a drive shaft 121 that rotates about the first axis A, and the power supply assembly 140 provides power to the motor 120 to drive the drive shaft 121 to rotate.

[0100] In some embodiments, as shown in FIG1, the electric wrench 100 includes a head 101, a grip 102, and a tail 103 from front to back, with the grip 102 connecting the head 101 and the tail 103. The housing 110 includes a head housing 111, a grip housing 112, and a rear cover 113, with the rear cover 113 corresponding to the tail 103. The grip housing 112 is the main housing of the housing 110, and is generally tubular. The motor 120 and the transmission assembly 130 are at least partially disposed within the grip housing 112. Optionally, the grip housing 112 and the rear cover 113 are separate, with the rear cover 113 detachably mounted to the grip housing 112. Optionally, the grip housing 112 and the rear cover 113 are integral, meaning that in this case, the housing 110 only includes the head housing 111 and the grip housing 112.

[0101] Motor 120 includes a drive shaft 121 rotatable about a drive axis. In this embodiment, the drive axis coincides with a first axis A. In other alternative embodiments, the drive axis is parallel to but not coincident with the first axis A. In other alternative embodiments, the drive axis is at an angle to the first axis A. In this embodiment, motor 120 is specifically an electric motor, and in the following description, "motor 120" will be used instead of "motor," but this should not be construed as a limitation of the invention. In this embodiment, motor 120 is a three-phase brushless motor, including a rotor with permanent magnets and three-phase stator windings U, V, W that are electronically commutated. In some embodiments, the three-phase stator windings U, V, W are connected in a star configuration, and in other embodiments, they are connected in a delta configuration. However, it must be understood that other types of brushless motors are also within the scope of this disclosure. Brushless motors may include fewer or more than three phases.

[0102] A transmission assembly 130 is disposed between the clutch assembly 200 and the motor 120, connecting the motor 120 and the clutch assembly 200. It is configured to transmit the torque of the drive shaft 121 to the clutch assembly 200, which is driven by the drive shaft 121. The transmission assembly 130 includes a planetary gear set configured for speed reduction. The planetary gear set converts the output speed of the motor 120 according to a certain transmission ratio to achieve a suitable torque. It is understood that this embodiment is only a preferred embodiment of the present invention, and the transmission assembly 130 is not limited to a planetary gear reduction mechanism, but can also be other reduction mechanisms, such as a bevel gear reduction mechanism. Optionally, the number of planetary gear trains can be single or multiple stages, as shown in Figure 2. In this embodiment, the planetary gear train has three stages. Because the working principle of planetary gear reduction and mechanical adjustment of the transmission ratio, as well as the speed reduction generated by this transmission assembly 130, has been fully disclosed to those skilled in the art, detailed descriptions are omitted here for the sake of brevity.

[0103] In this embodiment, the power supply component 140 is a DC power source, specifically a battery. The battery, in conjunction with a corresponding power circuit, supplies power to the electric wrench 100. Those skilled in the art should understand that the DC power source is not limited to scenarios using batteries; it can be a built-in rechargeable battery or a standard battery. It is understood that the electric wrench 100 can also supply power to its internal components via mains power or AC power, in conjunction with corresponding rectification, filtering, and voltage regulation circuits. In the following description, the battery 140 will be used instead of the power supply component 140, but this should not be construed as a limitation of the invention.

[0104] The electric wrench 100 also includes a switch assembly 150, which is mounted on the grip housing 112. When the user holds the grip, the user can relatively easily trigger the switch assembly 150, which can be configured to activate the main switch controlling the electric wrench 100.

[0105] As shown in Figure 2, the clutch assembly 200 includes a first shaft locking assembly 210, a second shaft locking assembly 220, an output shaft 230, and a drive shaft 240. The output shaft 230 includes a first output shaft 231 and a second output shaft 232. The first shaft locking assembly 210 is sleeved on the first output shaft 231 and the drive shaft 240 and is configured to transmit torque from the drive shaft 240 to the output shaft 230. The second shaft locking assembly 220 connects the transmission assembly 130 and the first shaft locking assembly 210 and is configured to transmit torque from the transmission assembly 130 to the first shaft locking assembly 210.

[0106] As shown in Figures 3 and 4, the first shaft lock assembly 210 includes a first shaft lock ring 211 and a reversing wheel 212. The first end 2111 of the first shaft lock ring 211 contacts the first output shaft 231, and the second end 2112 of the first shaft lock ring 211 engages with the reversing wheel 212. The first end 2111 of the first shaft lock ring 211 includes a hole matching the first output shaft 231 and is configured to engage the first output shaft 231. The second end 2112 of the first shaft lock ring 211 has a hollow structure and includes an outer ring matching the reversing wheel 212, configured to be sleeved on the reversing wheel 212. The second end 2112 is rotatable on the reversing wheel 212 and forms an accommodating space. The center of the reversing wheel 212 includes a hole 2121 matching the drive shaft 240, allowing the drive shaft 240 to pass through and engage with it. The drive shaft 240 is at least partially located within the accommodating space. The drive shaft 240 has a drive portion 241 that mates with the hole 2121, specifically an external hexagonal portion. Therefore, the first shaft lock assembly 210 is sleeved on the drive shaft 240 and the first output shaft 231, specifically, the first end 2111 of the first shaft lock ring 211 is sleeved on the first output shaft 231, and the reversing wheel 212 is sleeved on the drive shaft 240.

[0107] As shown in Figure 4, the reversing wheel 212 includes multiple levers 2122 on the side near the first shaft locking ring 211. These levers 2122 are spaced apart and arranged around the hole 2121, i.e., the levers 2122 surround the drive shaft 240 and are positioned within the accommodating space between the drive shaft 240 and the first shaft locking ring 211. Each lever 2122 includes an inner surface near the drive shaft 240 and an outer surface near the first shaft locking ring 211. The outer surface of the lever 2122 matches the outer ring of the first shaft locking ring 211. The first shaft locking ring 211 is sleeved on the reversing wheel 212, specifically on the lever 2122, and can rotate relative to the lever 2122, i.e., the reversing wheel 212. Optionally, the lever 2122 and the reversing wheel 212 are integrally formed. Optionally, the lever 2122 and the reversing wheel 212 are separately arranged, with the lever 2122 fixed to the reversing wheel 212. Optionally, there may be three dial blocks 2122 as shown in Figure 4. In addition, there may be other numbers of dial blocks 2122, which are not limited in this application.

[0108] As shown in Figure 4, the first shaft lock assembly 210 further includes a plurality of locking pins 213, which surround the drive shaft 240 and are disposed within the accommodating space between the drive shaft 240 and the first shaft lock ring 211. The locking pins 213 are positioned in the intervals between pairs of the multiple levers 2122, meaning the locking pins 213 and levers 2122 are spaced apart, and the locking pins 213 can slide within the intervals of the levers 2122. The number of locking pins 213 is the same as the number of levers 2122; in this embodiment, there are three locking pins 213 and three levers 2122.

[0109] As shown in Figure 4, the first axle lock assembly 210 also includes a separator 214 disposed between the reversing wheel 212 and the first axle lock ring 211. The separator 214 is configured to isolate the locking pin 213 and the reversing wheel 212. Simultaneously, the separator 214 can also isolate the reversing wheel 212 and the first axle lock ring 211. Because the reversing wheel 212 has low hardness, if the reversing wheel 212 and the first axle lock ring 211 are in direct contact without the separator 214, the friction generated by the relative movement between the reversing wheel 212 and the first axle lock ring 211 will cause wear on the end face of the reversing wheel 212.

[0110] The separator 214 includes a main body 2141 and an extension 2142. The main body 2141 is an annular gasket with a through hole in the center. The extension 2142 extends into the through hole in the center of the annular gasket. The number of extensions 2142 is the same as the number of locking pins 213, and the extensions 2142 can contact the locking pins 213. The separator 214 is positioned to fit against the side of the reversing wheel 212 with the lever 2122. Simultaneously, the opposite side of the separator 214 abuts against the locking pins 213, specifically through the extensions 2142. The extensions 2142 are positioned between the levers 2122, with each lever 2122 spaced apart from the other, forming an opening 2143 between adjacent extensions 2142. The lever 2122 is inserted into the opening 2143. The shape of the through hole matches the hole 2121, allowing the drive shaft 240 to pass through the through hole. Optionally, the surface of the separator 214 is flat, and the separator 214 is a gasket with a flat end face, so that the surface of the clamping locking post 213 is flat, thereby improving the stability of the clutch assembly 200 when outputting torque.

[0111] In some embodiments, as shown in Figures 3 and 4, the first shaft lock assembly 210 further includes a friction element 215, a pressing element 216, and a bearing 217. The friction element 215 is disposed between the reversing wheel 212 and the pressing element 216, with one end of the friction element 215 contacting the reversing wheel 212 and the other end contacting the pressing element 216. The pressing element 216 presses against the friction element 215, allowing the friction element 215 to be relatively securely disposed between the reversing wheel 212 and the pressing element 216. Optionally, the friction element 215 can be rubber. Optionally, the friction element 215 can be made of any material capable of providing friction; this application is not limited to any particular material. Optionally, the pressing element 216 can be a magnet, pressing against the reversing wheel 212 through magnetic interaction. Optionally, the pressing element 216 can be a spring, pressing against the friction element 215 and the reversing wheel 212 through elastic action. Furthermore, the pressing component 216 can be any component capable of providing a pressing effect; this application does not impose any limitations. The friction component 215 not only ensures that the reversing wheel 212 stops rotating promptly when the electric wrench 100 stops working, but also increases the stability of the reversing wheel 212, preventing it from shaking even when the electric wrench 100 as a whole shakes. The bearing 217 is located at the front end of the first shaft locking ring 211, sleeved on the first end 2111, and configured to support the first output shaft 231.

[0112] In some embodiments, the reversing wheel 212 has a protrusion 2123 formed on the side away from the first shaft locking ring 211. The first shaft locking assembly 210 also includes a stop assembly 218, which is sleeved on the outer ring of the protrusion 2123. The stop assembly 218 is configured to stop the reversing wheel 212 from rotating in a timely manner when the electric wrench 100 stops working. The protrusion 2123 is an annulus, and the center of the protrusion 2123 also includes a hole 2121 that matches the drive shaft 240.

[0113] Optionally, as shown in Figures 5A to 5D, the protrusion 2123 is specifically a gear-shaped protrusion, with multiple gears 2124 formed on the outer circumference of the annulus. The stop assembly 218 includes a stop ball 2181, a bushing 2182, an elastic element 2183, and a limiting ring 2184. The bushing 2182 contacts the protrusion 2123 and includes at least one hole 2185, through which the stop ball 2181 can pass and abut against the protrusion 2123. The elastic element 2183 also passes through the hole 2185 and abuts against the stop ball 2181. The limiting ring 2184 is fitted on the outer ring of the bushing 2182 and abuts against the elastic element 2183, preventing the elastic element 2183 and the stop ball 2181 from falling out of the hole 2185. As shown in Figures 5A to 5D, this application uses four holes 2185 as an example for specific explanation. In addition, the number of holes 2185 can also be two, three, five, or any number greater than or equal to one. The number of stop balls 2181 and elastic elements 2183 is the same as the number of holes 2185. Each hole 2185 is provided with one stop ball 2181 and one elastic element 2183.

[0114] When the electric wrench 100 is working, the reversing wheel 212 is driven to rotate. At this time, the gear 2124 on the protrusion 2123 presses the stop ball 2181 on the outer ring during rotation. The stop ball 2181 then presses the elastic element 2183 on the outer ring, allowing the reversing wheel 212 to rotate normally. When the electric wrench 100 stops working, the reversing wheel 212 is in a state of inertial rotation. At this time, the reversing wheel 212 does not have enough rotational force to press the stop ball 2181 on the outer ring. The elastic element 2183, based on its elasticity, presses the stop ball 2181 on the inner ring, causing the stop ball 2181 to fall between the adjacent gears 2124. Thus, the stop ball 2181 prevents the reversing wheel 212 from continuing to rotate, and the reversing wheel 212 stops rotating.

[0115] Optionally, as shown in Figures 6A to 6D, the protrusion 2123 is a smooth annular protrusion, and the stop assembly 218 includes a stop ring 2186. The stop ring 2186 includes a plurality of stop portions 2187 protruding inward from the ring. The stop portions 2187 abut against the protrusion 2123, and the stop portions 2187 and the protrusion 2123 are in an interference fit. The stop portions 2187 are made of a flexible rubber material, such as butadiene rubber or natural rubber. Optionally, the stop ring 2186 and the stop portions 2187 are made of the same material. Optionally, the stop ring 2186 and the stop portions 2187 are made of different materials; this application does not limit this.

[0116] When the electric wrench 100 is working, the reversing wheel 212 is driven to rotate. At this time, the reversing wheel 212 has a large rotational force, and as shown in Figure 6C, the reversing wheel 212 can rotate relative to the stop part 2187. The reversing wheel 212 presses the stop part 2187 to one side on the circumference. When the electric wrench 100 stops working, the reversing wheel 212 is in a state of inertial rotation. At this time, the reversing wheel 212 does not have enough rotational force to press the stop part 2187 anymore. The stop part 2187 needs to return to its original state, which generates a force in the opposite direction on the reversing wheel 212. This force cancels out the inertial rotational force of the reversing wheel 212, causing the reversing wheel 212 to stop rotating. In the process of stopping the reversing wheel 212, the reversing wheel 212 will generate a certain displacement based on the inertial rotational force before stopping. At this time, the opposite force generated by the stop part 2187 on the reversing wheel will drive the reversing wheel to move in the opposite direction after generating a certain displacement. This ensures that the reversing wheel 212 eliminates at least part of the displacement after generating a certain displacement, and the reversing wheel 212 can stop rotating with almost no displacement, thus ensuring the stability of the stopping position of the reversing wheel 212.

[0117] As shown in Figure 7, the output shaft 230 includes a first output shaft 231 and a second output shaft 232. The first output shaft 231 is engaged in the hole of the first shaft locking ring 211, and there is a meshing transmission relationship between the first output shaft 231 and the second output shaft 232. The first output shaft 231 rotates about a first axis A, and the second output shaft 232 rotates about a second axis B. The first axis A and the second axis B intersect. Optionally, the angle formed by the intersection of the first axis A and the second axis B can be an acute angle, which is the angle formed by the first output shaft 231 and the second output shaft 232. Optionally, the angle formed by the intersection of the first axis A and the second axis B can be an obtuse angle, which is the angle formed by the first output shaft 231 and the second output shaft 232. Optionally, the angle formed by the intersection of the first axis A and the second axis B can be a right angle as shown in Figure 7, that is, the first output shaft 231 is perpendicular to the second output shaft 232.

[0118] In some embodiments, as shown in FIG8, the second output shaft 232 includes a clamping portion 2321, that is, the second output shaft 232 includes an opening. Optionally, the clamping portion 2321 of the second output shaft 232 can be replaced with different types of shafts, such as 3 / 8 square shafts, 1 / 4 square shafts, hexagonal shafts, etc., so that it can be configured for different occasions. Optionally, the second output shaft 232 can clamp working accessories that perform different functions, such as screwdrivers, drill bits, sockets, etc.

[0119] As shown in Figures 9 and 10, the second shaft lock assembly 220 includes a second shaft lock ring 221, a drive wheel 222, and a second locking pin 223. The clutch assembly 200 also includes a second drive shaft 224. The drive wheel 222 includes a hole 2221 that mates with the second drive shaft 224. The drive wheel 222 is sleeved on the second drive shaft 224 and rotates synchronously with the second drive shaft 224. The end of the second drive shaft 224 near the first shaft lock assembly 210 includes an opening 2241 that mates with the drive shaft 240 and is configured to engage the drive shaft 240, so that the second drive shaft 224 drives the drive shaft 240 to rotate synchronously.

[0120] The second shaft locking ring 221 is fixedly disposed within the housing 110 and cannot rotate relative to the housing 110. The second shaft locking ring 221 is fitted around the second drive shaft 224, forming an accommodating space between the second shaft locking ring 221 and the second drive shaft 224, and the second locking pin 223 is located within the accommodating space. The drive wheel 222 near the second shaft locking ring 221 includes a plurality of second levers 2222, which are arranged around the hole 2221 with a certain interval between each other. That is, the plurality of second levers 2222 surround the second drive shaft 224 and are disposed within the accommodating space between the second drive shaft 224 and the second shaft locking ring 221. The cooperation relationship between the second lever 2222 and the second shaft locking ring 221 is the same as the cooperation relationship between the lever 2122 and the first shaft locking ring 211. The arrangement relationship of the second lever 2222 on the drive wheel 222 is the same as the arrangement relationship of the lever 2122 on the reversing wheel 212. The arrangement method and number of the second lever 2222 and the second locking pin 223 are the same as the arrangement method and number of the lever 2122 and the locking pin 213. These details will not be repeated here.

[0121] Optionally, the second shaft lock assembly 220 also includes a separator, which is disposed between the drive wheel 222 and the second shaft lock ring 221. The specific arrangement and structure are the same as those of the separator 214, and will not be described in detail here.

[0122] In some embodiments, the electric wrench 100 includes a manual operating mode. When the electric wrench 100 is in manual operating mode, the motor 120 does not rotate; that is, the drive shaft 121 of the motor 120 remains stationary, preventing the drive shaft 121 from driving the clutch assembly 200. In this mode, manual operating mode refers to the user manually reciprocating the electric wrench 100 to tighten or loosen fasteners.

[0123] When the user manually swings the electric wrench 100 for manual return, the first output shaft 231 rotates along the first direction, and the first shaft lock assembly 210 prevents the transmission shaft 240 from rotating, keeping the transmission shaft 240 stationary. That is, the first output shaft 231 and the transmission shaft 240 are in a disengaged (unlocked) state, and the first output shaft 231 rotates relative to the transmission shaft 240 along the first direction. Specifically, when the electric wrench 100 is in manual return mode, the user needs to swing the electric wrench 100 in a second direction, which is opposite to the first direction. That is, the first direction is the manual return direction of the electric wrench 100, and the second direction is the manual return direction of the electric wrench 100.

[0124] As shown in Figure 11, this application uses a clockwise direction as the first direction and a counterclockwise direction as the second direction for specific explanation. However, the first direction can also be counterclockwise, and the second direction can also be clockwise. When the user swings the electric wrench 100 in the second direction, the first output shaft 231 rotates. Based on the rear view of the electric wrench 100, the first output shaft 231 rotates along the first direction. The first output shaft 231 engages in the first shaft locking ring 211, causing the first shaft locking ring 211 to rotate synchronously along the first direction. As the first shaft locking ring 211 rotates along the first direction, it causes multiple locking pins 213 inside the accommodating space to rotate along the first direction. The accommodating space where the multiple locking pins 213 are located gradually increases until the multiple locking pins 213 contact the multiple levers 2122. Simultaneously, the first shaft locking ring 211 tends to drive the reversing wheel 212 to rotate in the first direction, but the reversing wheel 212 is in contact with the friction member 215, and the friction between the friction member 215 and the reversing wheel 212 prevents the reversing wheel 212 from rotating, thus keeping the reversing wheel 212 stationary. Alternatively, the stop assembly 218 prevents the first shaft locking ring 211 from driving the reversing wheel 212 to rotate, thus keeping the reversing wheel 212 stationary. Furthermore, the multiple levers 2122 on the reversing wheel 212 prevent the multiple locking pins 213 from continuing to be driven to rotate. The multiple levers 2122, which remain stationary, cannot press the multiple locking pins 213, thus preventing the multiple locking pins 213 from contacting the drive shaft 240. Therefore, the first shaft locking ring 211 cannot transmit the rotational torque to the drive shaft 240, and the drive shaft 240 will not rotate. At this time, the first output shaft 231 and the transmission shaft 240 are in a disjointed (unlocked) state. The rotation of the first output shaft 231 is independent of the transmission shaft 240. The first output shaft 231 rotates relative to the transmission shaft 240 in the first direction.

[0125] Therefore, when the electric wrench 100 is in manual return mode and the user swings the electric wrench 100 in the second direction, the first output shaft 231 and the first shaft locking ring 211 rotate along the first direction. However, the reversing wheel 212 prevents the transmission shaft 240 from rotating, causing the first output shaft 231 and the first shaft locking ring 211 to rotate along the first direction inside the electric wrench 100. Consequently, since the first output shaft 231 cannot drive the second output shaft 232 to rotate along the first direction relative to the second output shaft 232, and the second output shaft 232 remains stationary, it will not drive the fastener to rotate. This ensures that even during the return stroke of the electric wrench 100, the electric wrench 100 will not cause the fastener to rotate.

[0126] When the user manually moves the electric wrench 100 in manual mode, the first output shaft 231 rotates in the second direction. The first shaft locking assembly 210 drives the transmission shaft 240 to rotate in the second direction, while the second shaft locking assembly 220 prevents the transmission shaft 240 and the first output shaft 231 from rotating. That is, when the first output shaft 231 and the transmission shaft 240 are engaged (locked), they rotate synchronously in the second direction, and the second shaft locking assembly 220 prevents both the transmission shaft 240 and the first output shaft 231 from rotating. Specifically, when the electric wrench 100 is in manual mode, the user needs to move the electric wrench 100 in the first direction, and the second direction is the opposite of the first direction. In other words, the first direction is the manual movement direction of the electric wrench 100, and the second direction is the manual return direction of the electric wrench 100.

[0127] As shown in Figure 12, this application uses a clockwise direction as the first direction and a counterclockwise direction as the second direction for specific explanation. However, the first direction can also be counterclockwise, and the second direction can also be clockwise. When the user swings the electric wrench 100 in the first direction, the first output shaft 231 rotates. Based on the rear view of the electric wrench 100, the first output shaft 231 rotates along the second direction. The first output shaft 231 engages in the first shaft locking ring 211, causing the first shaft locking ring 211 to rotate synchronously along the second direction. As the first shaft locking ring 211 rotates along the second direction, it causes multiple locking pins 213 inside the accommodating space to rotate along the second direction. The accommodating space where the multiple locking pins 213 are located gradually decreases, causing the multiple locking pins 213 to contact the drive shaft 240. At this time, the first shaft locking ring 211 tends to drive the reversing wheel 212 to rotate in the second direction, but the reversing wheel 212 is in contact with the friction member 215, and the friction between the friction member 215 and the reversing wheel 212 prevents the reversing wheel 212 from rotating, thus keeping the reversing wheel 212 stationary. Alternatively, the stop assembly 218 prevents the reversing wheel 212 from rotating, thus keeping the reversing wheel 212 stationary. However, since multiple locking pins 213 are in contact with the drive shaft 240, and multiple locking pins 213 are also in contact with the first shaft locking ring 211, the first shaft locking ring 211 drives the drive shaft 240 to rotate in the second direction based on the multiple locking pins 213. At this time, the first output shaft 231 and the drive shaft 240 are in a engaged (locked) state, and the rotation of the first output shaft 231 is related to the drive shaft 240.

[0128] However, since the motor 120 does not rotate, the second drive shaft 224 of the second shaft lock assembly 220 does not rotate, thus preventing the drive shaft 240 from rotating continuously. That is, after the rotation of the first output shaft 231 causes the drive shaft 240 to tend to rotate, the second drive shaft 224 prevents the drive shaft 240 from rotating, and the drive shaft 240 prevents the first output shaft 231 from rotating. At this time, the first output shaft 231, the first shaft lock ring 211, and the drive shaft 240 can be considered as a single unit, all of which do not rotate relative to the electric wrench 100.

[0129] Therefore, when the user swings the electric wrench 100 in the first direction, the first output shaft 231, the first shaft locking ring 211, and the drive shaft 240 form a single unit and remain stationary inside the electric wrench 100. This causes the electric wrench 100 to swing in the first direction, resulting in the first output shaft 231 driving the second output shaft 232 to rotate along the first direction. That is, when the process is tightening, the second output shaft 232 can tighten the fastener; when the process is loosening, the second output shaft 232 can loosen the fastener.

[0130] Furthermore, in manual operation mode, whether manually returning or manually moving, the electric wrench 100 can be swung by the user at any angle to tighten or loosen. Compared to current electric wrenches using ratchet structures, which require the number of ratchet teeth to determine the angle of oscillation, this application can achieve stepless oscillation at any angle, and can also achieve oscillation at smaller angles, enabling work even in confined spaces. At the same time, the small-angle oscillation makes operation less strenuous for the user.

[0131] In some embodiments, the electric wrench 100 includes an electric operating mode. When the electric wrench 100 is in electric operating mode, the motor 120 rotates, and the drive shaft 121 of the motor 120 rotates, causing the drive shaft 121 to drive the clutch assembly 200. In this electric operating mode, the user does not need to manually swing the electric wrench 100 back and forth to tighten or loosen fasteners.

[0132] When the electric wrench 100 is in electric working mode, the transmission assembly 130 is driven to rotate by the drive shaft 121. This drives the second shaft locking assembly 220 to rotate, which in turn drives the first shaft locking assembly 210. Finally, the first shaft locking assembly 210 drives the output shaft 230 to rotate continuously. Specifically, the first shaft locking assembly 210 driving the output shaft 230 to rotate continuously means that when the drive shaft 121 rotates, the output shaft 230 also rotates. Unlike in related technologies, the output shaft 230 does not reciprocate; instead, it rotates continuously along the direction of rotation of the drive shaft 121. This allows the output shaft 230 to efficiently tighten or loosen fasteners.

[0133] As shown in Figure 13, the transmission assembly 130 drives the second shaft lock assembly 220 to rotate specifically: the rotation of the transmission assembly 130 drives the second transmission shaft 224 to rotate. Thus, the second transmission shaft 224 drives the cooperating transmission shaft 240 to rotate synchronously. During the rotation of the transmission shaft 240, the transmission shaft 240 contacts and presses against multiple locking pins 213, causing the multiple locking pins 213 to also contact the first shaft lock ring 211. Therefore, based on the multiple locking pins 213, the transmission shaft 240 drives the first shaft lock ring 211 to rotate synchronously. Furthermore, during the rotation of the transmission shaft 240, the transmission shaft 240 contacts multiple toggle blocks 2122, driving the multiple toggle blocks 2122 to rotate synchronously, that is, the transmission shaft 240 drives the reversing wheel 212 to rotate synchronously. This causes the transmission shaft 240 to drive the first shaft lock ring 211 to rotate based on the multiple locking pins 213 and the multiple toggle blocks 2122. Consequently, the first shaft lock ring 211 drives the output shaft 230 to rotate. Specifically, the first shaft locking ring 211 drives the first output shaft 231 to rotate, and the first output shaft 231 drives the second output shaft 232 to rotate synchronously.

[0134] Optionally, when the drive shaft 121 of the motor 120 rotates along the first direction, the second output shaft 232 also rotates along the first direction based on the aforementioned transmission. Optionally, when the drive shaft 121 of the motor 120 rotates along the second direction, the second output shaft 232 also rotates along the second direction based on the aforementioned transmission. Therefore, in electric operating mode, the electric wrench 100 tightens or loosens fasteners depending on the rotation direction of the drive shaft 121 of the motor 120. Through the rotation of the drive shaft 121, the electric wrench 100 can be continuously operated, allowing it to continuously tighten or loosen fasteners.

[0135] As shown in Figure 14, the electric wrench 100 also includes a controller 160, which is configured to control the rotation of the motor 120. The controller 160 can be located on the circuit board 170 of the electric wrench 100 and connected to the battery 140, the motor 120, and the switch assembly 150, controlling the rotation of the motor 120 based on signals from the battery 140 and the switch assembly 150. Alternatively, the controller 160 can also be located anywhere inside the electric wrench 100, connected to the battery 140, the motor 120, and the switch assembly 150, controlling the position of the motor 120.

[0136] The switch assembly 150 includes a forward switch 151 and a reverse switch 152. The forward switch 151 and reverse switch 152 can be arranged along the first axis A as shown in Figure 14, or perpendicular to the first axis A, or at any angle intersecting the first axis A. The first direction corresponds to the forward rotation direction, and the second direction corresponds to the reverse rotation direction. This application uses a clockwise direction as the first direction and a counterclockwise direction as an example for specific explanation. However, the first direction can also be counterclockwise, and the second direction can also be clockwise. When the user presses the forward switch 151, the controller 160 controls the motor 120 to continuously rotate clockwise to tighten the fastener until it is fully tightened. When the user presses the reverse switch 152, the controller 160 controls the motor 120 to continuously rotate counterclockwise to loosen the fastener until it is fully loosened. Therefore, when the electric wrench 100 is in electric working mode, the user can control the electric wrench 100 to tighten or loosen fasteners simply by pressing the forward switch 151 or the reverse switch 152.

[0137] In some embodiments, when the electric wrench 100 has insufficient power, the user needs to manually operate the electric wrench 100, i.e., the electric wrench 100 enters manual operation mode. However, in electric operation mode, the electric wrench 100 is already in the first direction (clockwise) tightening fasteners when the forward switch 151 is pressed, or in the second direction (counterclockwise) loosening fasteners when the reverse switch 152 is pressed. If the electric wrench 100 is operated directly in this state, the electric wrench 100 can only perform tightening or loosening operations. At this time, the electric wrench 100 needs to retain a certain amount of power to control the motor 120.

[0138] When the battery 140's charge level falls below a preset threshold, the controller 160 controls the drive shaft 121 of the motor 120 to stop rotating. The preset threshold is the amount of charge in the battery 140 sufficient to slightly rotate the motor 120. Optionally, if the battery 140 has a nominal voltage of 4V, the preset threshold can be 3.5V. After the charge level falls below the preset threshold, the forward switch 151 or the reverse switch 152 is triggered, and the controller 160 controls the motor 120 to drive the electric wrench 100 into manual operation mode. Specifically, the motor 120 drives the electric wrench 100 into manual operation mode by rotating it by a small angle.

[0139] Optionally, when the electric wrench 100 is in the electric working mode of tightening the fastener by rotating clockwise in the first direction (i.e., when the forward switch 151 is pressed in the electric working mode), if it is still necessary to tighten the fastener clockwise in the first direction, the user can switch to manual working mode without pressing any switch and continue using the electric wrench 100. If it is necessary to loosen the fastener counterclockwise in the second direction, the manual progress and manual return directions are reversed. The user needs to press the reverse switch 152 to rotate the drive shaft 121 of the drive motor 120 by a certain angle, so that the internal structure of the clutch assembly 200 corresponds to the counterclockwise direction as the progress direction. The specific relationship between the clutch assembly 200 in manual return and manual progress has been explained in detail above and will not be repeated here.

[0140] Optionally, when the electric wrench 100 is in the electric working mode of rotating counterclockwise in the second direction to loosen the fastener (i.e., when the reverse switch 152 is pressed in the electric working mode), if it is still necessary to loosen the fastener counterclockwise in the second direction, the user can switch to manual working mode without pressing any switch and continue using the electric wrench 100. If it is necessary to tighten the fastener clockwise in the first direction, the manual progress and manual return directions are reversed. The user needs to press the forward switch 151, which will rotate the drive shaft 121 of the drive motor 120 by a certain angle, so that the internal structure of the clutch assembly 200 corresponds to the clockwise progress direction.

[0141] Therefore, when the electric wrench 100 switches from electric working mode to manual working mode, if the progress and return of the manual working mode are the same as before, no switch needs to be pressed; if the progress and return of the manual working mode are reversed, a different switch needs to be pressed to change the direction of progress and return.

[0142] In some embodiments, as shown in FIG15, the electric wrench 100 includes a reversing member 180, which is disposed on the grip portion 102 of the electric wrench 100 and contacts the first shaft lock assembly 210. The reversing member 180 can enable the electric wrench 100 to enter the manual working mode normally when the battery 140 of the electric wrench 100 is completely depleted and cannot drive the motor 120 to rotate.

[0143] As shown in Figure 16, both the forward switch 151 and the reverse switch 152 are disposed on the upper side of the reversing member 180, and both protrude from the grip housing 112. The reversing member 180 can be disposed at any position on the grip 102 for convenient user operation. Regardless of the position of the reversing member 180, the forward switch 151 and the reverse switch 152 are always disposed on the upper side of the reversing member 180. Optionally, the forward switch 151 and the reverse switch 152 can be disposed perpendicular to the first axis A as shown in Figure 15. Optionally, the forward switch 151 and the reverse switch 152 can also be disposed at any angle intersecting the first axis A; this application does not impose any limitation on this.

[0144] The commutator 180 includes a first opening 181 and a second opening 182. When the commutator 180 is in the first position, the first opening 181 corresponds to the forward switch 151, and the second opening 182 corresponds to the reverse switch 152. The commutator 180 is in the first position when the battery 140 has sufficient power. The forward switch 151 contains a forward switch spring 1511, and the reverse switch 152 contains a reverse switch spring 1521. When the battery 140 has sufficient power, i.e., when the commutator 180 is in the first position, the forward switch 151 can be activated by pressing the forward switch spring 1511, passing through the first opening 181, thereby causing the controller 160 to control the drive shaft 121 of the motor 120 to rotate in the first direction. Alternatively, the reverse switch 152 can be activated by pressing the reverse switch spring 1521, passing through the second opening 182, thereby causing the controller 160 to control the drive shaft 121 of the motor 120 to rotate in the second direction. In addition, the forward switch 151 can also stop the motor 120 from rotating when the forward switch spring 1511 is pressed and reset; the reverse switch 152 can stop the motor 120 from rotating when the reverse switch spring 1521 is pressed and reset.

[0145] As shown in Figures 16 and 17, the reversing member 180 includes a portion disposed inside the grip housing 112 and a protruding portion 1801 protruding from the grip housing 112 for manual operation by the user. When the battery 140 of the electric wrench 100 is completely depleted, the user pushes the protruding portion 1801, causing the reversing member 180 to be pushed to a second position. At this time, the first opening 181 no longer corresponds to the forward switch 151, and the second opening 182 no longer corresponds to the reverse switch 152. The reversing member 180 prevents the forward switch 151 or the reverse switch 152 from being pressed and activated.

[0146] The reversing member 180 contacts the reversing wheel 212. During the process of the reversing member 180 being pushed from the first position to the second position, the reversing member 180 drives the reversing wheel 212 to rotate, causing the locking pin 213 to disengage from the drive shaft 240 to perform manual return, or the locking pin 213 to engage with the drive shaft 240 to perform manual operation. Thus, based on the first shaft lock assembly 210, the reversing member 180 enables the electric wrench 100 to enter manual operation mode even when the power is completely depleted. The specific relationship between the clutch assembly 200 during manual return and manual operation has been described above and will not be repeated here. When the battery 140 of the electric wrench 100 has power, the user can push the protruding portion 1801 again to push the reversing member 180 from the second position to the first position.

[0147] Furthermore, as shown in Figure 16, a switching friction element 1802 is provided between the reversing member 180 and the first shaft lock assembly 210 to increase the friction between the reversing member 180 and the reversing wheel 212, enabling the reversing member 180 to stably drive the reversing wheel 212 to rotate. Optionally, the switching friction element 1802 can be made of rubber. Optionally, the switching friction element 1802 can be any component with friction, and this application is not limited thereto.

[0148] Therefore, when the electric wrench 100 is in a completely de-energized manual working mode, the user controls the electric wrench 100 to tighten or loosen fasteners based on the forward switch 151, the reverse switch 152, and the reversing element 180.

[0149] In some embodiments, as shown in FIG18, the outer casing 110 is composed of a head casing 111, a grip casing 112, and a rear cover 113. In this case, the grip casing 112 and the rear cover 113 are formed separately, and the rear cover 113 is detachably mounted to the grip casing 112. Optionally, the grip casing 112 is a plastic casing. Optionally, the head casing 111 is at least partially a metal casing, thereby increasing the strength and ductility of the head casing 111. The head casing 111 can extend to cover the grip casing 112 to sequentially accommodate one or more of the clutch assembly 200, the transmission assembly 130, the motor 120, and the battery 140, thereby enhancing the overall strength of the electric wrench 100. As shown in FIG18, the head casing 111 includes a front casing 1111, which refers to the portion corresponding to the meshing connection between the first output shaft 231 and the second output shaft 232. Optionally, the front casing 1111 is a metal casing. Optionally, the front housing 1111 is a transparent plastic housing, which makes it convenient for the user to observe the meshing and transmission of the first output shaft 231 and the second output shaft 232.

[0150] In some embodiments, the housing 110 is secured with screws and nuts. The rear cover 113 is screwed to the grip housing 112; in the radial direction of the power wrench 100, the screw passes through the grip housing 112 and the head housing 111 to secure them together; the front cover 1111 is screwed to the head housing 111. In some embodiments, the housing 110 is not secured with screws and nuts. The rear cover 113 is snapped or threaded to the grip housing 112, which is an integral tubular housing, and the grip housing 112 is threaded to the head housing 111; the front cover 1111 is snapped to the head housing 111.

[0151] In some embodiments, when the outer casing 110 is composed of a head casing 111, a grip casing 112, and a rear cover 113, the entire outer casing 110 is a sealed casing, and the outer casing 110 does not include a channel communicating with the outside. Therefore, the electric wrench 100 has good waterproof and dustproof capabilities and can be used for underwater operations. Optionally, the metal head casing 111 is in contact with metal parts such as the motor 120 or transmission assembly 130, and the metal head casing 111 can dissipate heat to the outside, allowing the heat generated by the motor 120 or transmission assembly 130 to be transferred to the outside, thereby achieving heat dissipation of the electric wrench 100. Optionally, heat-absorbing materials are provided in the heat sources inside the outer casing 110, such as the motor 120, to achieve heat dissipation of the electric wrench 100.

[0152] In some embodiments, as shown in FIG19, the outer casing 110 includes a first casing 114 and a second casing 115. The first casing 114 and the second casing 115 are two casings parallel to the vertical plane containing the first axis A. The first casing 114 and the second casing 115 are half-casings of the entire outer casing 110. The first casing 114 and the second casing 115 are symmetrically arranged with respect to the vertical plane containing the first axis A, and the outer casing 110 is formed by the fixed connection of the first casing 114 and the second casing 115. Optionally, the first casing 114 and the second casing 115 are plastic casings. Optionally, when the entire outer casing 110 is a plastic casing, in order to enhance the stability of the meshing connection between the first output shaft 231 and the second output shaft 232, a metal connecting frame is provided on the first output shaft 231 and the second output shaft 232. Both the first output shaft 231 and the second output shaft 232 pass through the metal connecting frame, and the metal connecting frame is fixed to the outer casing 110 by screws.

[0153] In some embodiments, when the outer casing 110 is composed of a head casing 111, a grip casing 112 and a rear cover 113, or when the outer casing 110 is composed of a first casing 114 and a second casing 115, the outer casing 110 is provided with a channel communicating with the outside world, thereby dissipating heat from the electric wrench 100.

[0154] In some embodiments, as shown in FIG2, the transmission assembly 130 includes an internal gear ring 131, which directly contacts the housing 110, i.e., the transmission assembly 130 does not include a gearbox. As shown in FIG15, a circuit board 170 is configured to control the operation of the electric wrench 100. The circuit board 170 is arranged parallel to the vertical plane containing the first axis A. The side of the circuit board 170 parallel to the first axis A is the longer side, and the side perpendicular to the first axis A is the shorter side. The battery 140 is inserted into the housing 110 parallel to the first axis A, with the side of the battery 140 parallel to the first axis A being the longer side and the side perpendicular to the first axis A being the shorter side. The electric wrench 100 has a narrow width due to the structure of the transmission assembly 130, the circuit board 170, and the battery 140. Furthermore, the battery 140 can also be a removable battery disposed outside the housing 110, with an interface on the housing 110 that mates with the battery 140, allowing for timely replacement of the battery 140 when its power is insufficient.

[0155] In some embodiments, as shown in FIG20, the width W of the electric wrench 100 is less than or equal to 50 mm in the direction perpendicular to the first axis A. Optionally, the width W of the electric wrench 100 is 45 mm. Optionally, the width W of the electric wrench 100 is 40 mm. Optionally, the width W of the electric wrench 100 is 35 mm. Optionally, the width W of the electric wrench 100 is 30 mm. In some embodiments, the length L of the electric wrench 100 is less than or equal to 300 mm in the direction parallel to the first axis A. Optionally, the length L of the electric wrench 100 is 285 mm. Optionally, the length L of the electric wrench 100 is 250 mm. Optionally, the length L of the electric wrench 100 is 230 mm. Optionally, the length L of the electric wrench 100 is 215 mm. Optionally, the length L of the electric wrench 100 is 214.2 mm.

[0156] In some embodiments, the widths of different portions of the electric wrench 100 are different. Optionally, the width of the grip portion 102 is 38 mm. Optionally, the width of the grip portion 102 is 36 mm. Optionally, the width of the grip portion 102 is 32 mm. Optionally, when the grip portion 102 is generally elliptical tubular, the width of the grip portion 102 is 38 mm in the top view shown in FIG. 20, and 36 mm in the side view shown in FIG. 18. In some embodiments, in the top view shown in FIG. 20, the width W1 of the foremost part of the head 101 is less than or equal to 35 mm, that is, the width of the portion corresponding to the front shell 1111 is less than or equal to 35 mm. Optionally, the width of the portion corresponding to the front shell 1111 is 33 mm. Optionally, the width of the portion corresponding to the front shell 1111 is 30 mm. Optionally, the width of the portion corresponding to the front shell 1111 is 28 mm. Optionally, the width of the portion corresponding to the front cover 1111 is 25mm. Optionally, the width of the portion corresponding to the front cover 1111 is 24.8mm.

[0157] In some embodiments, the electric wrench 100 further includes a lighting component 300, which is disposed on the head 101 of the electric wrench 100. The lighting component 300 can be disposed on any part of the head 101 that can be clearly illuminated. Optionally, the lighting component 300 can be a single lamp. Optionally, the lighting component 300 can be multiple lamps, each disposed on the head 101. Optionally, the lighting component 300 can be a ring lamp, arranged around the head 101. Optionally, the lighting component 300 can be a light strip. Optionally, the lighting component 300 can include various forms of lamps, for example, as shown in FIG21, including both single lamps and light strips. In addition, the lighting component 300 can also be other forms of lamps, which are not limited in this application.

[0158] The switch assembly 150 is connected to the circuit board 170, and the lighting assembly 300 is also connected to the circuit board 170. To reduce the routing of the connecting wires and the radial dimension of the electric wrench 100, the lighting assembly 300 is directly connected to the circuit board 170 along a direction parallel to the first axis A, and the connection line between the switch assembly 150 and the circuit board 170 includes at least a portion intersecting the first axis A. Optionally, this application does not limit the connection line between the switch assembly 150 and the circuit board 170 to include at least an angle intersecting the first axis A; the connection line between the switch assembly 150 and the circuit board 170 may include at least a portion perpendicular to the first axis A.

[0159] In some embodiments, as shown in FIG22, the first output shaft 231 and the second output shaft 232 do not have corresponding front housings 1111, and the first output shaft 231 is provided with an internal hexagonal hole, so that the first output shaft 231 and the second output shaft 232 can be simultaneously inserted with a screwdriver, or any one of the first output shaft 231 and the second output shaft 232 can be inserted with a screwdriver. In some embodiments, as shown in FIG23, the output shaft 230 includes only the first output shaft 231, which is a rotatable output shaft, so that after the screwdriver is inserted into the first output shaft 231, multi-angle operation can be achieved by rotating the first output shaft 231 left and right.

[0160] The foregoing has shown and described the basic principles, main features, and advantages of this application. Those skilled in the art should understand that the above embodiments do not limit this application in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this application.

Claims

1. An electric tool, comprising: The outer casing has a grip portion configured for holding. A motor, including a drive shaft that rotates about a first axis; The clutch assembly is driven by the drive shaft; A transmission assembly that connects the motor and the clutch assembly; in, The clutch assembly includes a first shaft lock assembly, a second shaft lock assembly, a drive shaft, and an output shaft. The output shaft includes a first output shaft. The first shaft lock assembly is sleeved on the drive shaft and the first output shaft and is configured to transmit the torque of the drive shaft to the output shaft. The second shaft lock assembly connects the drive assembly and the first shaft lock assembly and is configured to transmit the torque of the drive assembly to the first shaft lock assembly. When the drive shaft remains stationary and the first output shaft rotates in a first direction, the first shaft locking assembly prevents the drive shaft from rotating, and the drive shaft remains stationary; when the drive shaft remains stationary and the first output shaft rotates in a second direction, the first shaft locking assembly drives the drive shaft to rotate in the second direction, and the second shaft locking assembly prevents both the drive shaft and the first output shaft from rotating; wherein the second direction is opposite to the first direction.

2. The power tool as claimed in claim 1, wherein the output shaft further comprises a second output shaft, the first output shaft rotates along the first axis, the second output shaft rotates about a second axis, and the first axis intersects the second axis.

3. The power tool as claimed in claim 1, wherein, The first shaft lock assembly includes a first shaft lock ring and a reversing wheel. The first end of the first shaft lock ring is sleeved on the first output shaft, and the second end of the first shaft lock ring cooperates with the reversing wheel. The reversing wheel is sleeved on the drive shaft.

4. The power tool of claim 3, wherein the first shaft lock assembly further comprises a friction member and a pressing member, one side of the friction member being in contact with the reversing wheel, and the other side of the friction member being in contact with the pressing member.

5. The power tool as claimed in claim 4, wherein, When the first output shaft rotates along the first direction, the first output shaft drives the first shaft locking ring to rotate, the friction element prevents the first shaft locking ring from driving the reversing wheel to rotate, and the reversing wheel remains stationary to prevent the drive shaft from rotating.

6. The power tool as claimed in claim 3, wherein, A protrusion is formed on the side of the reversing wheel away from the first shaft locking ring. The first shaft locking assembly also includes a stop component, which is sleeved on the outer ring of the protrusion. When the output shaft rotates along the first direction, the stop component prevents the first shaft locking ring from driving the reversing wheel to rotate.

7. The power tool as claimed in claim 6, wherein, The protrusion is a gear-shaped protrusion; the stop assembly includes a stop ball, a bushing, an elastic element and a limiting ring, the bushing includes a hole, the stop ball passes through the hole and abuts against the protrusion, the elastic element passes through the hole and abuts against the stop ball, and the limiting ring is sleeved on the outer ring of the bushing and abuts against the elastic element.

8. The power tool as claimed in claim 6, wherein, The stop assembly includes a stop ring, which includes a plurality of stop portions protruding inward, the stop portions abutting against the protrusions.

9. The power tool as claimed in claim 8, wherein, The protrusion is a smooth, annular protrusion, and the stop is made of flexible rubber material.

10. The power tool as claimed in claim 3, wherein, The portion of the first shaft locking ring that contacts the reversing wheel forms an accommodating space, and the drive shaft includes a portion located within the accommodating space.

11. The power tool of claim 10, wherein the first shaft lock assembly further comprises a plurality of locking pins and a plurality of levers, the plurality of levers being fixedly connected to the reversing wheel, the plurality of locking pins and the plurality of levers being disposed around the drive shaft within the accommodating space, and the plurality of locking pins and the plurality of levers being spaced apart.

12. The power tool as claimed in claim 11, wherein, When the first output shaft rotates along the first direction, the plurality of locking pins rotate along the first direction, and the accommodating space of the plurality of locking pins increases so that the plurality of locking pins do not contact the drive shaft.

13. The power tool as claimed in claim 11, wherein, The second shaft lock assembly includes a second shaft lock ring, which is fixedly disposed within the housing.

14. The power tool as claimed in claim 13, wherein, When the drive shaft remains stationary and the first output shaft rotates along the second direction, the plurality of locking pins rotate along the second direction, and the accommodating space of the plurality of locking pins decreases so that the plurality of locking pins contact the drive shaft and the first shaft locking ring, thereby driving the drive shaft to rotate along the second direction.

15. The power tool as claimed in claim 14, wherein, When the drive shaft rotates in the second direction, the second shaft locking assembly prevents the drive shaft from rotating continuously.

16. A power tool, comprising: The outer casing has a grip portion configured for holding. A motor, including a drive shaft that rotates about a first axis; The clutch assembly is driven by the drive shaft; A transmission assembly that connects the motor and the clutch assembly; in, The clutch assembly includes a first shaft lock assembly, a second shaft lock assembly, a drive shaft, and an output shaft. The output shaft includes a first output shaft. The second shaft lock assembly connects the drive assembly and the first shaft lock assembly. The first shaft lock assembly is sleeved on the drive shaft and the first output shaft. When the drive shaft remains stationary and the first output shaft and the transmission shaft are in a disjoint state, the first output shaft rotates relative to the transmission shaft in a first direction; when the drive shaft remains stationary and the first output shaft and the transmission shaft are in a engaged state, the first output shaft and the transmission shaft rotate synchronously in a second direction, and the second shaft locking assembly prevents the transmission shaft and the first output shaft from rotating; wherein, the second direction is opposite to the first direction.

17. A power tool, comprising: The outer casing has a grip portion configured for holding. A motor, including a drive shaft that rotates about a first axis; The clutch assembly is driven by the drive shaft; A transmission assembly that connects the motor and the clutch assembly; in, The clutch assembly includes a first shaft lock assembly, a second shaft lock assembly, a drive shaft, and an output shaft. The second shaft lock assembly connects the drive assembly and the first shaft lock assembly, and the first shaft lock assembly is sleeved on the drive shaft and the output shaft. The output shaft includes a first output shaft and a second output shaft. The first shaft locking assembly is sleeved on the drive shaft and the first output shaft and is configured to transmit the torque of the drive shaft to the first output shaft, and the first output shaft transmits the torque to the second output shaft. When the drive shaft remains stationary and the output shaft and the transmission shaft are separated, the first output shaft rotates in a first direction relative to the second output shaft.

18. The power tool of claim 17, wherein, The first output shaft rotates along the first axis, and the second output shaft rotates about the second axis, with the first axis intersecting the second axis.

19. The power tool as claimed in claim 17, wherein, When the drive shaft remains stationary and the output shaft and the transmission shaft are engaged, the first output shaft drives the second output shaft to rotate along the first direction.

20. The power tool of claim 17, wherein, The second output shaft includes a clamping part configured to clamp working attachments that perform different functions.

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