CN220362530U - Electric tool - Google Patents

Abstract

The application discloses power tool includes: an output shaft; a motor; a transmission assembly; the output shaft is formed or connected with a shaft locking piece; a shaft lock assembly for locking rotation of the shaft lock to lock rotation of the output shaft, and comprising: an operating member for operation by a user to move to a first position in which rotation of the shaft lock is locked, or to a second position in which rotation of the shaft lock is released; the locking assembly comprises a locking piece, a limiting piece and a driving piece, wherein the locking piece is used for locking the shaft locking piece when the operating piece moves to a first position and releasing the shaft locking piece when the operating piece moves to a second position, the driving piece is used for driving the locking piece to move, and the driving piece is used for driving the locking piece to move to lock the shaft locking piece when rotating; the driving piece is connected with the operating piece, and after the operating piece moves to the first position or the second position, the driving piece is blocked by the limiting piece so that the operating piece stays at the first position or the second position.

Description

Electric tool

Technical Field

The present application relates to a power tool.

Background

The electric tool such as an angle grinder can be provided with assembly parts such as a saw blade to realize grinding, cutting and other operations, and is influenced by the characteristics of materials to be processed and the service lives of the assembly parts such as the saw blade, and the assembly parts such as the saw blade need to be replaced in time in order to ensure the normal operation of the tool. In general, the blade is mounted on the free end of the output shaft, and the motor must be stopped during replacement, and then the output shaft is locked, the scrapped blade removed and a new blade replaced.

In the related art, when the saw blade is replaced, a user needs to continuously press related elements for locking the output shaft by one hand, and the saw blade is detached and replaced by the other hand, so that the operation is inconvenient and the saw blade is dangerous to a certain extent.

This section provides background information related to the present application, which is not necessarily prior art.

Disclosure of Invention

It is an object of the present application to solve or at least mitigate some or all of the above problems. It is therefore an object of the present application to provide a power tool that is more convenient to operate.

In order to achieve the above object, the present application adopts the following technical scheme:

a power tool, comprising: an output shaft for connecting the fitting; the motor comprises a motor shaft for driving the output shaft to rotate; the transmission assembly is used for realizing power transmission between the motor shaft and the output shaft, and when the motor shaft rotates by taking the first axis as the shaft, the transmission assembly drives the output shaft to rotate by taking the second axis as the shaft; the output shaft is formed or connected with a shaft locking piece; the power tool further includes: a shaft lock assembly for locking rotation of the shaft lock to lock rotation of the output shaft about a second axis, and comprising: an operating member for operation by a user to move to a first position in which rotation of the shaft lock is locked, or to a second position in which rotation of the shaft lock is released; a locking assembly including a locking member for locking rotation of the shaft locking member when the operating member is moved to the first position and releasing rotation of the shaft locking member when the operating member is moved to the second position, a limiting member and a driving member for driving movement of the locking member, the driving member being configured to drive movement of the locking member to lock rotation of the shaft locking member when the operating member is moved to the first position; the driving piece is connected with the operating piece, and after the operating piece moves to the first position or the second position, the driving piece is blocked by the limiting piece so that the operating piece stays at the first position or the second position.

In some embodiments, the operating member is arranged to drive the driving member to rotate about the fourth axis when performing the rotation about the third axis.

In some embodiments, the limiting member is formed with a first inclined plane and a second inclined plane, and after the operating member rotates to the first position, the driving member receives resistance along the first direction on the first inclined plane so as to enable the operating member to stay at the first position; after the operating member rotates to the second position, the driving member receives resistance along the second direction on the second inclined surface so that the operating member stays at the second position.

In some embodiments, during rotation of the operating member from the second position to the first position, the operating member applies a force to the driving member opposite to the second direction to drive the driving member past the limiting portion; during the process that the operation piece rotates from the first position to the second position, the operation piece applies power opposite to the first direction to the driving piece so as to drive the driving piece to pass through the limiting part.

In some embodiments, the shaft lock is formed with one or more locking grooves into which the locking member is partially inserted, the locking member partially inserting into the locking groove when moving to lock rotation of the shaft lock.

In some embodiments, the shaft lock assembly further comprises a biasing member having one end abutting the locking member and the other end abutting the driving member and adapted to apply a biasing force to the locking member.

In some embodiments, the driving member drives the locking member to move during movement of the operating member from the second position to the first position, the locking member partially engaging the locking slot to lock rotation of the shaft lock when the locking member is in any of the locking slot slots; when the locking member is positioned on the guide surface between the adjacent locking grooves, the locking member receives a biasing force from the biasing member and is partially embedded in the locking grooves after sliding along the guide surface relative to the shaft locking member to lock the rotation of the shaft locking member.

In some embodiments, the driving member is a metal member made of wire.

In some embodiments, the metal member includes a rotation portion, and a first end and a second end disposed at both sides of the rotation portion, the first end being connected to the operation member, and the second end being formed with a driving portion for driving the locking member.

A power tool, comprising: an output shaft for connecting the fitting; the motor comprises a motor shaft for driving the output shaft to rotate; the transmission assembly is used for realizing power transmission between the motor shaft and the output shaft, and when the motor shaft rotates by taking the first axis as the shaft, the transmission assembly drives the output shaft to rotate by taking the second axis as the shaft; the output shaft is formed or connected with a shaft locking piece; the power tool further includes: a shaft lock assembly for locking rotation of the shaft lock to lock rotation of the output shaft about a second axis, and comprising: an operating member for operation by a user to move to a first position in which rotation of the shaft lock is locked, or to a second position in which rotation of the shaft lock is released; the locking assembly comprises a locking piece, a limiting piece and a driving piece, wherein the locking piece is used for locking rotation of the shaft locking piece when the operating piece moves to a first position and releasing rotation of the shaft locking piece when the operating piece moves to a second position, the driving piece is used for driving the locking piece to move, and the operating piece is arranged to drive the locking piece to move to lock rotation of the shaft locking piece when the operating piece rotates; the driving part is connected with the operating part, and after the operating part moves to the first position or the second position, the driving part is blocked by the limiting part so that the operating part stays at the first position or the second position.

The beneficial point of the application lies in: in the locking assembly consisting of the locking piece, the limiting piece and the driving piece, the driving piece and the operating piece cooperatively rotate to drive the locking piece to lock and release the output shaft, so that the space arrangement of the parts is facilitated, operation blockage caused by dust, dirt and the like is not easy to occur, the limiting piece stops the driving piece when the operating piece is at a specified position so that the operating piece and the locking piece are stopped, the output shaft can be locked after one-time action of a user, the operation such as pressing is not required to be continuously executed, and the efficiency and experience of the user when the tool assembly is replaced can be improved.

Drawings

FIG. 1 is a perspective view of a power tool shown in an embodiment;

FIG. 2 is a perspective view of the internal portion of the power tool of FIG. 1 from one perspective;

FIG. 3 is a perspective view of the internal portion of the power tool of FIG. 1 from another perspective;

FIG. 4 is an exploded view of the shaft lock and shaft lock assembly of FIG. 3;

FIG. 5 is a plan view of the shaft lock assembly of FIG. 2 with the operating member in a first position;

FIG. 6 is a plan view of the shaft lock assembly of FIG. 3 with the operating member in a second position;

fig. 7 is a perspective view of the operating member and the driving member of fig. 2 when they are rotationally driven;

FIG. 8 is a plan view of the shaft lock of FIG. 2 locked by the locking member;

FIG. 9 is a cross-sectional view of the shaft lock and shaft lock assembly of FIG. 3;

FIG. 10 is a plan view of the shaft lock and lock of FIG. 3 with the operating member in a second position;

FIG. 11 is a plan view of the shaft lock and lock of FIG. 2 in one condition with the operating member in the first position;

fig. 12 is a plan view of the shaft lock and lock of fig. 2 in another condition with the operating member in the first position.

Detailed Description

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

In this application, the terms "comprises," "comprising," "has," "having," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

In the present application, the term "and/or" is an association relationship describing an association object, meaning that three relationships may exist. For example, a and/or B may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" in this application generally indicates that the front-rear association object is an "and/or" relationship.

The terms "connected," "coupled," and "mounted" are used herein to describe either a direct connection, a coupling, or an installation, or an indirect connection, a coupling, or an installation. By way of example, two parts or components are connected together without intermediate members, and by indirect connection is meant that the two parts or components are respectively connected to at least one intermediate member, through which the two parts or components are connected. Further, "connected" and "coupled" are not restricted to physical or mechanical connections or couplings, and may include electrical connections or couplings.

In this application, one of ordinary skill in the art will understand that relative terms (e.g., "about," "approximately," "substantially," etc.) used in connection with quantities or conditions are intended to include the values and have the meanings indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a particular value, the tolerance associated with a particular value resulting from manufacture, assembly, use, and the like. Such terms should also be considered to disclose a range defined by the absolute values of the two endpoints. Relative terms may refer to the addition or subtraction of a percentage (e.g., 1%,5%,10% or more) of the indicated value. Numerical values, not employing relative terms, should also be construed as having specific values of tolerance. Further, "substantially" when referring to relative angular positional relationships (e.g., substantially parallel, substantially perpendicular) may refer to adding or subtracting a degree (e.g., 1 degree, 5 degrees, 10 degrees, or more) from the indicated angle.

In this application, one of ordinary skill in the art will understand that a function performed by a component may be performed by one component, multiple components, a part, or multiple parts. Also, the functions performed by the elements may be performed by one element, by an assembly, or by a combination of elements.

In the present application, the terms "upper", "lower", "left", "right", "front", "rear", and the like are described in terms of orientation and positional relationship shown in the drawings, and should not be construed as limiting the embodiments of the present application. In the context of this document, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on the other element or be indirectly on the other element through intervening elements. It should also be understood that the terms upper, lower, left, right, front, back, etc. are not only intended to represent positive orientations, but also to be construed as lateral orientations. For example, the lower side may include a right lower side, a left lower side, a right lower side, a front lower side, a rear lower side, and the like.

The free end of the output shaft in the power tool is used for assembling various assemblies. In one case, the user needs to replace the fitting to perform a different type of job, and in another case, the user also needs to replace the worn old fitting. When the motor is replaced, the motor is stopped and the output shaft is locked, and then the original fitting is removed and a new fitting is replaced.

The technical solutions proposed in the present application are specifically described below with reference to the accompanying drawings and the specific embodiments.

Fig. 1 shows a power tool 100 as one embodiment in the present application. As shown in fig. 2 to 3, the power tool 100 includes a motor, an output shaft 20, and a transmission assembly 30. The output shaft 20 is used to connect a fitting such as a saw blade. When the motor shaft 11 in the motor rotates around the first axis 101, power transmission is realized through a transmission assembly 30 such as a gear, a belt pulley and the like, and the output shaft 20 is driven to rotate around the second axis 102. In some examples, the first axis 101 may be parallel to the second axis 102, and in other examples, the first axis 101 may also intersect or be perpendicular to the second axis 102.

The power tool 100 also includes a shaft lock 40, and a shaft lock assembly 50. Wherein the output shaft 20 forms or is coupled to the shaft lock 40, and the shaft lock 40 directly or indirectly via the transmission assembly 30 locks or releases rotation of the output shaft 20 about the second axis 102. The shaft lock 40 follows the rotation of the output shaft 20 when the output shaft 20 rotates, and the output shaft 20 is stopped by the shaft lock 40 when the shaft lock 40 stops. The shaft lock assembly 50 is used to lock or release the rotation of the shaft lock 40 to effect locking and release of the rotation of the output shaft 20.

Referring to fig. 4 to 7, the shaft lock assembly 50 includes an operating member 51 and a locking assembly 52. The operating member 51 is configured to be operated by a user and moved to different positions by the user, and specifically includes a first position in which the shaft lock member 40 is locked, and a second position in which the locking of the shaft lock member 40 is released. As shown in fig. 5, the operating member 51 is in a first position 501. As shown in fig. 6, the operating member 51 is in the second position 502. In one case, the operating member 51 is moved from the first position to the second position after being operated, and in the other case, the operating member 51 is moved from the second position to the first position. In this embodiment, the operating member 51 may be configured to be rotated after being operated, and the operating member 51 may be rotated about the third axis 103 to and from the first position and the second position. The locking assembly 52 is arranged to lock the operating member 51 to stay in the first position after the operating member 51 is moved to the first position, and to lock the shaft lock 40 such that rotation of the output shaft 20 is locked. The locking assembly 52 is further arranged to lock the operating member 51 to stay in the second position after the operating member 51 is moved to the second position, and to release the shaft lock 40 such that the locking of the output shaft 20 is released.

The locking assembly 52 further includes a locking member 521, a limiting member 522, and a driving member 523. Wherein the locking member 521 is used to lock or release the shaft lock 40. As shown in fig. 5, the locking member 521 is provided to move to the third position and lock the shaft lock 40 when the operating member 51 moves to the first position. As shown in fig. 6, the locking member 521 is further configured to move to the fourth position and release the shaft lock 40 when the operating member 51 moves to the second position. In this embodiment, the locking member 521 may be a shaft locking rod, which can lock the rotation of the shaft locking member 40 when the shaft locking rod is inserted into the shaft locking member 40, and release the rotation of the shaft locking member 40 when the shaft locking member 40 is disengaged.

The driving member 523 is connected to the operating member 51 and the locking member 521 for transmitting driving force between the operating member 51 and the locking member 521, and is configured to drive the locking member 521 to move between a third position corresponding to the first position and a fourth position corresponding to the second position to lock and release the shaft locking member 40 when the operating member 51 moves between the first position and the second position. As shown in fig. 7, in this embodiment, the operating member 51 may be configured to be rotated after being operated, and the operating member 51 may be rotated back and forth between the first position and the second position about the third axis 103. The driving element 523 may be provided to move rotationally, and when the operating element 51 rotates around the third axis 103 to and from the first position and the second position, the driving element 523 may rotate around the fourth axis 104 to and from the fifth position and the sixth position. The operating member 51 rotates in conjunction with the driving member 523 to achieve the related functions, and its rotational structure can save space, facilitate component arrangement, and is less prone to operational blockage caused by dust, dirt, etc.

The limiting member 522 is used to stay at the first position or the second position of the operating member 51 after the operating member is moved to the first position or the second position, so that the current locked or released state of the shaft lock member 40 is maintained. After the operation member 51 moves to the first position, the stopper 522 blocks and holds the driving member 523 to stop the operation member 51 at the first position. After the operation member 51 moves to the second position, the stopper 522 blocks and holds the driving member 523 to stop the operation member 51 at the second position.

The specific implementation of the components within the locking assembly 50 and the specific process of locking and releasing the output shaft in the power tool 100 will be described in more detail below.

In some embodiments, the stop 522 may be a stop formed on the housing of the locking assembly 50 with the first ramp 507 and the second ramp 508 formed thereon, and the driver 523 will contact either the first ramp 507 or the second ramp 508 and be resisted on the contact surface by the resistance applied thereto to stop the movement of the driver 523. The blocking portion 522 will be used later instead of the stopper 522, but it does not constitute a limitation of the present application.

The driving member 523 may be a metal member made of a metal wire, and for example, the driving member 523 may be a swing frame made of an iron wire. The metal piece may include a rotation portion 5233, a first end 5231 and a second end 5232 disposed on two sides of the rotation portion 5233, the first end 5231 is connected to the operating member 51, and the second end 5232 is formed with a driving portion 5234. The driving part 5234 can be connected to the locking member 521 to drive the movement of the locking member 521. The swing frame 523 will be used later instead of the driving member 523, but it does not constitute a limitation of the present application.

Referring to fig. 5, the operating member 51 is currently in the second position in which the rotation of the locking member 521 is released, the second end 5232 of the swing frame 523 is held against the blocking portion 522 at the second inclined surface 508, and the blocking portion 522 applies a resistance force in the second direction to the second end 5232 through the second inclined surface 508 to prevent the swing frame 523 from rotating to the first position to stay in the second position.

When the user pushes the operating member 51 to rotate from the second position to the first position, the power applied to the operating member 51 by the user is transmitted to the second end 5232 through the first end 5231 of the swing frame 523, and the second end 5232 is thus capable of applying the power in the opposite second direction to the blocking portion 522 through the second inclined surface 508, and the swing frame 523 has a certain elasticity, and after the power overcomes the resistance originally applied by the blocking portion 522, the second end 5232 can pass over the blocking portion 522 to reach the first position.

Referring to fig. 6, the operating member 51 is currently in the first position in which the rotation of the locking member 521 is locked, the second end 5232 of the swing frame 523 is held against the blocking portion 522 at the first inclined surface 507, and the blocking portion 522 applies a resistance force in the first direction to the second end 5232 through the first inclined surface 507 to prevent the swing frame 523 from rotating to the second position to stay in the first position.

When the user pushes the operation member 51 to rotate from the first position to the second position, the power applied by the user to the operation member 51 is transmitted to the second end 5232 through the first end 5231 of the swing frame 523, and the second end 5232 is thus capable of applying the power in the opposite first direction to the blocking portion 522 through the first inclined surface 507, and the second end 5232 can pass over the blocking portion 522 and stay at the second position after the power overcomes the resistance originally applied by the blocking portion 522 due to the certain elasticity of the swing frame 523.

Referring to fig. 8, in some embodiments, the shaft lock 40 may be a shaft lock ring coupled to the output shaft 20, the shaft lock ring integrally formed with the output shaft 20 and rotatable about the second axis 102, and the shaft lock ring 40 may be used in place of the shaft lock 40, but is not limited thereto. In addition, in some embodiments, the locking member 521 may be an axle lock rod, and an axle lock rod 521 will be used instead of the locking member 521, which again should not be construed as limiting the present application.

The shaft locking ring 40 is provided on its outer circumferential surface with one or more locking grooves 41 into which the shaft locking lever 521 is partially inserted. The locking grooves 41 extend toward the center of the circle in the radial direction of the shaft lock ring 40, open toward the outside of the shaft lock ring 40, adjacent locking grooves 41 are spaced apart by the same distance or angle, and the outer circumferential surface of the shaft lock ring 40 between the locking grooves 41 is provided as a guide surface 42. For example, four locking grooves may be provided along the outer circumference of the shaft locking ring, with the four locking grooves being provided at 90 ° intervals, with the guide surfaces between the locking grooves being provided as arc surfaces.

Referring to fig. 9, in some embodiments, the shaft lock assembly 50 further includes a biasing member 54 capable of applying force to the shaft lock lever 521 to urge it into the lock groove 41, and a pressing member 55 to which the biasing member 54 is attached, one end of the biasing member 54 abutting the shaft lock lever 40, the other end abutting the pressing member 55. The biasing member 54 is provided in the pressing member 55, and the pressing member 55 is connected to the swing frame 523. An annular groove 551 is formed on the outer wall of the pressing piece 55, and the second end 5232 of the swing frame 523 is inserted into the annular groove 551, so that the driving part 5234 drives the pressing piece 55 to move in the radial direction. For example, the biasing member 54 may be a floating spring having one end abutting against the shaft lock lever 40 and the other end abutting against the driving portion 5234 of the swing frame 523 via the pressing member 55. A floating spring 54 will be used later in place of the biasing member 54, but this should not be construed as limiting the present application. When the swing frame 523 rotates, the driving part 5234 drives the pressing piece 55 to move in the radial direction, and the pressing piece 55 drives the floating spring 54 to press the shaft locking lever 521 to move in the radial direction toward the shaft locking ring 40.

Referring to fig. 10, when the user pushes the operating member 51 to rotate from the second position to the first position, the driving part 5234 of the swing frame 523 is engaged with the annular groove 551 of the pressing piece 55, compressing the floating spring 54 and driving the shaft lock lever 521 to move downward. In the case where any one of the locking grooves 41 of the shaft locking ring 40 is notched directly under the shaft locking rod 521, the shaft locking rod 521 can smoothly move downward and fit into the locking groove 41, and then the rotation of the shaft locking ring 40 is locked to lock the rotation of the output shaft 20.

Referring to fig. 11, in a case where the guide surface 42 between the adjacent locking grooves 41 of the shaft locking ring 40 is located below the shaft locking lever 521, the upper end of the shaft locking lever 40 abuts against the floating spring 54, and the lower end abuts against the guide surface 41, and is relatively slidable along the guide surface 42. After the shaft lock lever 40 slides to any one of the lock groove 41 notches, the shaft lock lever 521 may slide into the lock groove 41 notch, releasing the compressed floating spring 54, and the downward biasing force applied thereto by the floating spring 54 may cause the shaft lock lever 521 to fit into the lock groove 41 and lock the rotation of the shaft lock lever 40 and the output shaft 20.

Referring to fig. 12, when the user pushes the operating member 51 to rotate from the first position to the second position, the driving part 5234 of the swing frame 523 is engaged with the annular groove 551 of the pressing piece 55, releasing the compressed floating spring 54 and driving the shaft lock lever 521 to move upward, so that the shaft lock lever 521 is disengaged from the notch of the locking groove 41, and thus the rotation of the shaft lock ring 40 and the output shaft 20 is released.

The foregoing has outlined and described the basic principles, main features and advantages of the present application. It will be appreciated by persons skilled in the art that the above embodiments are not intended to limit the present application in any way, and that all technical solutions obtained by means of equivalent substitutions or equivalent transformations fall within the scope of the present application.

Claims (10)

1. A power tool, comprising:

an output shaft for connecting the fitting;

the motor comprises a motor shaft for driving the output shaft to rotate;

the transmission assembly is used for realizing power transmission between the motor shaft and the output shaft, and when the motor shaft rotates by taking the first axis as the shaft, the transmission assembly drives the output shaft to rotate by taking the second axis as the shaft;

the device is characterized in that the output shaft is formed or connected with a shaft locking piece;

the power tool further includes:

a shaft lock assembly for locking rotation of the shaft lock to lock rotation of the output shaft about the second axis, and comprising:

an operating member for operation by a user to move to a first position in which rotation of the shaft lock is locked, or to a second position in which rotation of the shaft lock is released;

a locking assembly comprising a locking member for locking rotation of the shaft lock when the operating member is moved to the first position and releasing rotation of the shaft lock when the operating member is moved to the second position, a stop member and a driving member for driving movement of the locking member, the driving member being arranged to drive movement of the locking member to lock rotation of the shaft lock when rotation is performed;

the driving piece is connected with the operating piece, and after the operating piece moves to the first position or the second position, the driving piece is blocked by the limiting piece so that the operating piece stays at the first position or the second position.

2. The power tool according to claim 1, wherein the operation member is configured to drive the driving member to rotate about a fourth axis when the driving member rotates about the third axis.

3. The power tool according to claim 2, wherein the limiting member is formed with a first inclined surface and a second inclined surface, and the driving member receives resistance in a first direction on the first inclined surface to cause the operating member to stay in the first position after the operating member rotates to the first position; after the operating member rotates to the second position, the driving member receives resistance along the second direction on the second inclined surface so that the operating member stays at the second position.

4. The power tool of claim 3, wherein during rotation of the operating member from the second position to the first position, the operating member applies a force to the driving member opposite the second direction to drive the driving member past the limiting member; during rotation of the operating member from the first position to the second position, the operating member applies a force to the driving member opposite the first direction to drive the driving member past the limiting member.

5. The power tool of claim 1, wherein the shaft lock is formed with one or more locking grooves into which the locking member is partially inserted, the locking member being partially inserted into the locking groove when moved to lock rotation of the shaft lock.

6. The power tool of claim 5, wherein the spindle lock assembly further comprises a biasing member having one end abutting the locking member and the other end abutting the driving member and adapted to apply a biasing force to the locking member.

7. The power tool of claim 6, wherein the driving member drives the locking member to move during movement of the operating member from the second position to the first position, the locking member partially engaging the locking slot to lock rotation of the shaft locking member when the locking member is in any of the locking slot slots; the locking member receives a biasing force from the biasing member while the locking member is positioned on a guide surface between adjacent locking grooves and is partially engaged with the locking grooves after sliding along the guide surface relative to the shaft locking member to lock rotation of the shaft locking member.

8. The power tool of claim 1, wherein the driving member is a metal member made of a wire.

9. The power tool according to claim 8, wherein the metal member includes a rotating portion, and first and second ends provided on both sides of the rotating portion, the first end being connected to the operating member, the second end being formed with a driving portion for driving the locking member.

10. A power tool, comprising:

an output shaft for connecting the fitting;

the motor comprises a motor shaft for driving the output shaft to rotate;

the transmission assembly is used for realizing power transmission between the motor shaft and the output shaft, and when the motor shaft rotates by taking the first axis as the shaft, the transmission assembly drives the output shaft to rotate by taking the second axis as the shaft;

the device is characterized in that the output shaft is formed or connected with a shaft locking piece;

the power tool further includes:

a shaft lock assembly for locking rotation of the shaft lock to lock rotation of the output shaft about the second axis, and comprising:

an operating member for operation by a user to move to a first position in which rotation of the shaft lock is locked, or to a second position in which rotation of the shaft lock is released;

a locking assembly comprising a locking member for locking rotation of the shaft lock when the operating member is moved to the first position and releasing rotation of the shaft lock when the operating member is moved to the second position, a stop member and a driving member for driving movement of the locking member, the operating member being arranged to drive movement of the locking member to lock rotation of the shaft lock when rotation is performed;

the driving piece is connected with the operating piece, and after the operating piece moves to the first position or the second position, the driving piece is blocked by the limiting piece so that the operating piece stays at the first position or the second position.