CN111906730A

CN111906730A - Power tool

Info

Publication number: CN111906730A
Application number: CN201910375537.9A
Authority: CN
Inventors: 郑悦; 张士松; 钟红风
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2019-05-07
Filing date: 2019-05-07
Publication date: 2020-11-10

Abstract

The present invention relates to a power tool comprising: a housing; a motor; the output shaft is provided with an axially arranged containing hole capable of containing the working head, and the reduction gearbox is used for transmitting the power of the motor to the output shaft; the storage clamp is provided with a plurality of working head bins capable of containing the working heads, the storage clamp is provided with a rotating axis, the storage clamp can rotate to a position where one of the working head bins corresponds to the accommodating hole around the rotating axis, the working head bins and the reduction gearbox are at least partially overlapped in the axial direction of the rotating axis, the axial size of the power tool is reduced, and the working head bins are distributed around the reduction gearbox, the number of the stored working heads is large, so that the storage requirements of large-size and large-number working heads are well met, and the storage clamp is compact in structure.

Description

Power tool

Technical Field

The invention relates to a power tool, in particular to a power tool of gun drills.

Background

Conventional power tools of the gun drill type generally include electric drills, screwdrivers, impact drills, and the like. The user needs to perform different types of operations such as screwing, drilling and the like during operation. Therefore, the working heads need to be frequently replaced, great inconvenience is brought to an operator, the replacement is complicated on one hand, and the replaced working heads are easy to lose on the other hand.

In order to solve the above problems, some conventional power tools can store and replace the working head. The power tool is provided with a storage clamp capable of storing the working head, so that the storage and replacement of the working head can be realized.

In implementing the conventional technique, the inventors found that at least the following technical problems exist: the power tool can basically switch the working head with the length of 1 inch, but the working head with the length of 1 inch is too short, so that the accessibility is too poor, and the drilling depth is not enough. A 2 inch long work head is more accessible, but if a 2 inch long work head is to be stored and switched, the axial dimension of the power tool becomes larger. Further, when there are both the requirement of the storage amount and the requirement of the storage size, the power tool of the conventional art is more difficult to realize.

Disclosure of Invention

In view of the above, there is a need for an improved power tool that addresses the problem of achieving excessive axial dimensions due to the number of stored and long-stored working heads.

A power tool, comprising:

a housing;

a motor disposed in the housing to output a rotational power;

the output shaft is provided with an accommodating hole which is axially arranged and can accommodate the working head;

the reduction box is connected with the output shaft of the motor and used for transmitting the rotary motion of the motor to the output shaft;

the storage clamp is provided with a plurality of working head bins capable of containing the working heads, the storage clamp is provided with a rotating axis, the storage clamp can rotate to a position, corresponding to the containing hole, of one of the working head bins around the rotating axis, the working head bin is at least partially overlapped with the motor and the reduction gearbox in the axial direction of the rotating axis, and the working head bins are distributed around the reduction gearbox.

According to the power tool, the working head bin and the motor are overlapped in the axial direction of the rotation axis, the working head bin and the reduction gearbox are overlapped in the axial direction of the rotation axis, the required total axial size is small, the axial size of the power tool is greatly reduced, the axial size of the power tool cannot be increased when the working head bin can store longer working heads, and the working head bins surround the reduction gearbox and are distributed and stored in a large number, so that the storage requirements of large-size and large-number working heads are well met, and the structure is compact.

In one embodiment, the storage clip has an axially extending inner cavity along the axis of rotation, the plurality of working head cartridges being distributed around the inner cavity in a circumferential direction about the axis of rotation, the reduction gearbox being at least partially housed in the inner cavity.

In one embodiment, the reduction gearbox includes an input assembly connected to the drive shaft of the motor, a connecting shaft transmitting power of the input assembly to the output shaft, wherein the input assembly and the connecting shaft are aligned in the axial direction of the rotation axis.

In one embodiment, the power tool further comprises:

the locking mechanism comprises a locking piece which can move along the radial direction of the output shaft and is used for locking or releasing the working head;

an operating mechanism configured to be movable relative to the housing, the operating mechanism having a position to apply a force to the locking mechanism to lock the retaining member; and a position where no force is applied to the locking mechanism to release the locking member.

In one embodiment, the operating mechanism is further configured to drive the working head to move when moving relative to the machine shell, so that the working head enters the working head bin from the accommodating hole or vice versa.

In one embodiment, the operating mechanism comprises a first moving part for applying an acting force on the locking mechanism to lock the locking part and a second moving part for driving the working head to move, and the first moving part and the second moving part are connected through a first elastic part.

In one embodiment, the movement process of the first moving member for locking the locking member includes a first stroke and a second stroke, and in the first stroke, the second moving member and the first moving member move synchronously to drive the working head to enter the accommodating hole; in the second stroke, the second moving part is kept still, and the first moving part overcomes the resistance of the first elastic part and continuously applies acting force to the locking mechanism.

In one embodiment, a magnetic member capable of attracting the working head is arranged at the end part of the second moving member corresponding to the accommodating hole.

In one embodiment, the output shaft is provided with a containing groove which is radially communicated with the containing hole; the locking member is received in the receiving groove and is movable in a radial direction of the output shaft to partially enter the receiving hole.

In one embodiment, the locking mechanism further comprises:

the locking sleeve is sleeved on the output shaft in an axially movable manner and is provided with a first position for releasing the locking piece, a second position for locking the locking piece and a third position for releasing the locking piece, and the first position, the second position and the third position are sequentially far away from the working head bin in the axial direction of the rotation axis;

the operating sleeve is sleeved outside the locking sleeve in an axially movable manner and is configured to drive the locking sleeve to move from a second position to a third position; and

the second elastic piece is arranged between the locking sleeve and the shell, the second elastic piece is configured to provide an elastic force for driving the locking sleeve to move from the second position to the first position, and the locking sleeve drives the operating sleeve to move when moving from the second position to the first position.

In one embodiment, the locking sleeve has a pressing surface capable of pressing the locker, a first release surface and a second release surface are formed on both sides of the pressing surface, and the inner diameter of the locking sleeve at the pressing surface is smaller than that at the first release surface and smaller than that at the second release surface.

In one embodiment, the inner wall of the locking sleeve is formed with a step portion, the top surface of the step portion forms the pressing surface, and the inner walls of the locking sleeve on both sides of the step portion form the first release surface and the second release surface, respectively.

In one embodiment, the retaining member is a ball or a cylinder.

In one embodiment, at least one side of the output shaft is provided with the locking member.

Drawings

FIG. 1 is a schematic structural view of a power tool according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a storage clip of the power tool shown in FIG. 1;

FIG. 3 is a cross-sectional view of the power tool of FIG. 1 in a rear-pull configuration;

FIG. 4 is an enlarged view of portion A of FIG. 3;

FIG. 5 is a cross-sectional view of the power tool of FIG. 1 in an intermediate state;

FIG. 6 is a cross-sectional view of the power tool of FIG. 1 in an operational state;

fig. 7 is a sectional view schematically showing the power tool shown in fig. 1 in a manually unlocked state.

The relevant elements in the figures are numbered correspondingly as follows:

100. power tool

110. Case 112, horizontal part 114, handle part

116. Battery 118 and stopper

120. Motor 122, drive shaft

130. Output shaft 132, receiving hole 134, receiving groove

136. Driven gear

140. Reduction gearbox 141, input assembly 142 and connecting shaft

1421. Driving gear 143, reduction box casing

150. Storage clamp 151, rotation axis 152, working head magazine

153. Inner cavity

160. Locking mechanism 161, retaining member 162, locking sleeve

1621. A compression surface 1622, a first release surface 1623, and a second release surface

1624. Baffle 163, operating sleeve 164, second elastic member

170. Operating mechanism 171, first moving member 172, second moving member

1721. Magnetic member 173, first elastic member

200. Working head

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It should be noted that when a portion is referred to as being "secured to" another portion, it can be directly on the other portion or there can be an intervening portion. When a portion is said to be "connected" to another portion, it may be directly connected to the other portion or intervening portions may be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

In the description of the present invention, it is to be understood that the terms "length," "width," "thickness," "height," "depth," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing and simplifying the description, and are not intended to indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The preferred embodiments of the power tool according to the embodiments of the present invention will be described below with reference to the accompanying drawings. The power tool of the invention can be a screwdriver, an electric drill and other types of electric tools. In a preferred embodiment of the power tool of the present invention, the power tool is a screwdriver. According to different power sources, the screw driver can be divided into a pneumatic screw driver, a hydraulic screw driver and an electric screw driver, and the electric screw driver also has a direct current and an alternating current.

Referring to fig. 1 to 4, a power tool 100 according to an embodiment of the present invention includes a housing 110, a motor 120, an output shaft 130, a reduction box 140, and a storage clip 150.

The housing 110 may be formed by two half-shells that are symmetrical to each other, and has a horizontal portion 112 and a handle portion 114 that is disposed at an obtuse angle to the horizontal portion 112. Motor 120, output shaft 130, reduction gearbox 140 and storage clip 150 are all mounted inside horizontal portion 112 of housing 110, with motor 120 being powered by battery 116 mounted on handle portion 114. The type of battery 116 may be flexibly selected, such as may be a lithium ion battery. The lithium ion battery herein refers to a generic name of a rechargeable battery in which a negative electrode material is lithium element.

The motor 120 is used for outputting rotary power and driving the output shaft 130 to rotate through the reduction box 140. The output shaft 130 is used for driving the working head 200 to work. As shown in fig. 4, the output shaft 130 has an axially disposed receiving hole 132 for receiving the working head. The working head 200 is embodied as a screwdriver head, but may be other types of working heads, such as a drill.

The storage clip 150 is a support mechanism for the working head 200. As shown in fig. 1 and 2, the storage clip 150 is rotatably supported in the housing 110 and has a rotation axis 151. The storage holder 150 is provided with a plurality of work head magazines 152 on a circumferential direction around the rotation axis 151 for storing the work heads 200, respectively. The magazine 150 is rotatable about its rotational axis 151 so that one of the plurality of working head cartridges 152 can correspond to the receiving hole 132 in the axial direction of the output shaft 120, as shown in fig. 3. So that the operator can select a desired working head by rotating the storage clip 150 and transfer the working head 200 into the receiving hole 132. On the contrary, when the working head in the receiving hole 132 needs to be loaded into the working head chamber 152 of the storage clip 150, the storage clip 150 is rotated to make an empty working head chamber 152 correspond to the receiving hole 132, and then the working head 200 is pulled out from the receiving hole 132 of the output shaft 130 and enters the working head chamber 152.

As shown in fig. 2, in the present embodiment, the reduction gearbox 140 is connected to the driving shaft 122 of the motor 120, and the storage clip 150 is supported by the reduction gearbox 140 to be rotatable with respect to the reduction gearbox 140.

The working head magazine 152 of the storage clip 150 at least partially overlaps the motor 120 in the axial direction of the rotation axis 151. Specifically, the working head cartridge 152 and the driving shaft 122 of the motor 120 at least partially overlap in the axial direction of the rotation axis 151, and both are required to have a small axial size and a compact structure.

The working head chamber 152 and the reduction box 140 are at least partially overlapped in the axial direction of the rotation axis 151, and a plurality of the working head chambers 140 are distributed around the reduction box 140. Specifically, in conjunction with fig. 2 and 3, the number of the working head chambers 152 is illustrated as 8. The 8 working head bins 152 are uniformly distributed around the reduction gearbox 140 and are stored in a large number. Moreover, each working head bin 152 is arranged along the axial direction of the rotating axis 151, the reduction gearbox 140 is also arranged along the axial direction of the rotating axis 151 and is arranged side by side with the working head bin 152, and the axial sizes of the working head bins and the working head bins are overlapped, so that the axial size of the power tool is greatly reduced, and the working head bins 152 can be arranged to store longer working heads without increasing the axial size of the power tool. Thus, the power tool 100 of the present embodiment can well meet the storage requirements of large-size and large-quantity working heads, and has a compact structure.

In some embodiments, as shown in fig. 2 and 3, the storage clip 150 has an inner cavity 153 extending axially along the axis of rotation, a plurality of working head cartridges 152 are distributed around the inner cavity 153 on a circumference about the axis of rotation 151, and the reduction gearbox 140 is at least partially housed in the inner cavity 153. The centerline of the cavity 153 coincides with the axis of rotation 151. Specifically, the storage clip 150 is provided at the center thereof with an inner cavity 153, the working head chamber 152 is provided on the outer circumferential surface of the storage clip 150, and the reduction gear box 140 is disposed in the inner cavity 153. The reduction case 140 is thus disposed using the inner space of the storage clip 150, and the reduction case 140 and the storage clip 150 are compact as a whole.

In a specific embodiment, as shown in fig. 3 and 4, the reduction gearbox 140 includes an input assembly 141 connected to the motor 120, a connecting shaft 142 for transmitting power of the input assembly 141 to the output shaft 130, and a reduction gearbox housing 143, wherein the input assembly 141 and the connecting shaft 142 are disposed inside the reduction gearbox housing 143 and are aligned in an axial direction of the rotation axis 151. The storage clip 150 is fitted over the exterior of the gearbox housing 143.

The input assembly 141 is located in the internal cavity 153 near the motor 120, axially of the rotation axis 151, between the motor 120 and the connecting shaft 142. An end of the connecting shaft 142 remote from the input assembly 141 extends out of the cavity 153 and extends below the output shaft 130. Torque is transmitted between the connecting shaft 142 and the output shaft 130 through a tooth structure. Specifically, as shown in fig. 3, a driving gear 1421 is fixed to the outside of the connecting shaft 142, and a driven gear 136 is fixed to the outside of the output shaft 130. The input member 141 is a gear mechanism, such as a planetary reduction gear train, which is known per se to those skilled in the art, and is not an improvement point of the present invention, and will not be described again.

In some embodiments, as shown in fig. 1, 3, and 4, the power tool further includes a locking mechanism 160 and an operating mechanism 170. The lock mechanism 160 includes a lock member 161 movable in the radial direction of the output shaft 130. The locking member 161 is used to lock or release the working head 200 inserted into the receiving hole 132 of the output shaft 130. The operating mechanism 170 is operable to move relative to the housing 100 to apply a force to the locking mechanism 160 to hold the locking member 161 in a position to lock the working head 200, or to release the locking member 161 from the locking mechanism 160 to release the locking member 161 and thus the locking member 161 from the working head 200.

Specifically, as shown in fig. 3, 5 and 7, no force is applied to the locking mechanism 160 by the operating mechanism 170, and the locking member 161 releases the working head 200. As shown in fig. 6, the operating mechanism 170 abuts against the locking mechanism 160 and applies a force to the locking mechanism 160, the locking member 161 can be kept at a position for locking the working head 200, and the output shaft 130 can drive the working head 200 to rotate.

In a specific embodiment, as shown in fig. 4, the output shaft 130 further has a receiving groove 134 radially communicating with the receiving hole 132, and the locking member 161 is disposed in the receiving groove 134 and can move in the receiving groove 134 along the radial direction of the output shaft 130 to partially enter the receiving hole 132. As shown in FIG. 6, when the locker 161 is partially inserted into the receiving hole 132 and maintained at this position, the locker 161 can lock the working head 200.

Here, the housing groove 134 penetrates the output shaft 130. Therefore, it can be said that there are two housing grooves and the two housing grooves are provided symmetrically with respect to the axis of the output shaft 130. Of course, the receiving groove 134 may be provided only on one side of the axis of the output shaft 130.

The locking member 161 is a ball or a cylinder, and is placed in the receiving groove 134 and may partially protrude into the receiving hole 132. The locker 161 can move in the radial direction of the output shaft 130 in the receiving groove 134. In this embodiment, the locking members 161 are disposed on both sides of the output shaft 130, but the locking members 161 may be disposed on only one side.

Further, the operating mechanism 170 is configured to move relative to the housing 110 to actuate the working head 200, so that the working head 200 can enter the working head chamber 152 from the receiving hole 132 or vice versa.

As shown in fig. 3 and 5, the operating mechanism 170 includes a first moving member 171 and a second moving member 172, wherein the first moving member 171 is manually operated by a user and can move left and right relative to the housing 110 to abut against or separate from the locking mechanism 160; the second moving member 172 is driven by the first moving member 171 to move left and right, and the second moving member 172 is used to drive the working head 200 to move, so that the working head 200 can enter the working head chamber 152 from the receiving hole 132 or vice versa. The end of the second moving member 172 corresponding to the receiving hole 132 is provided with a magnetic member 1721 capable of attracting the working head 200. Thus, the work head 200 is attracted by magnetic force, and a complicated connection structure is not required. The magnetic member 1721 is preferably a magnet.

In this embodiment, the first moving member 171 is connected to the second moving member 172 through the first elastic member 173, so that the first moving member 171 can drive the second moving member 172 to move together and can move relative to the second moving member 172. Thus, the movement of the first moving member 171 to lock the locker 161 includes a first stroke and a second stroke. In the first stroke, the second moving part 172 is synchronously moved by the first moving part 171 and drives the working head 200 to move; in the second stroke, the second moving member 172 is not moved, and the first moving member 171 is moved relative to the second moving member 172 to a position abutting against the locking mechanism 160. The first elastic member 173 is preferably a spring. This is described in further detail below in conjunction with the figures.

As shown in fig. 3 and 4, the first moving member 171 is located at a position away from the locking mechanism 160, and at this time, the storage clamp 150 can be rotated to switch the working head 200, and the second moving member 172 is located at a side (left side in fig. 3) of the working head 200 away from the receiving hole 132, and this state of the power tool 100 is defined as a pull-back state, at this time, the locking member 161 can only partially enter the receiving hole 132 under the action of gravity, but cannot be reliably held at this position, that is, the locking member 161 is in a release state, and cannot lock the working head 200.

As shown in fig. 5, the first moving member 171 is shown moved from the position of fig. 4 to the right by the first stroke, and then the second moving member 172 is stopped by the housing 110, and the first moving member 171 moves to the position contacting with the locking mechanism 160. In the first stroke, the second moving member 172 is synchronously moved by the first moving member 171 and drives the working head 200 to move until being limited by the machine shell 110. The state of the power tool 100 shown in fig. 5 is defined as an intermediate state, in which the working head 200 is driven by the second moving member 172 to enter the interior of the receiving hole 132 to a position that can be clamped by the locking member 161, but the locking member 161 is not locked yet, so that the locking member 161 does not lock the working head 200.

As shown in fig. 6, after the second moving member 172 is limited by the housing 110, the position of the first moving member 171 after the second moving member 172 continues to move for the second stroke from the position of fig. 5 is shown, at this time, the first moving member 171 is kept in contact with the locking mechanism 160 and applies a force to the locking mechanism 160 in the right direction, the locking member 161 is locked and locks the working head 200, and this state of the power tool 100 is defined as the working state. In the second stroke, the second moving member 172 remains stationary, and the first moving member 171 moves against the resistance of the first elastic member 173 and continues to apply force to the locking mechanism 160 until the locking member 161 is locked.

As can be seen from the above movement process, in the process of making the first moving member 171 abut against the locking mechanism 160 to lock the locking member 161, the first moving member 171 does not need to push the second moving member 172 all the time, so that the operation is labor-saving; in addition, in the second stroke, the first moving member 171 and the second moving member 172 overlap in the axial direction of the rotation axis 151, and a movement space required is relatively smaller than that in a manner that the first moving member 171 and the second moving member 172 always move synchronously, so that the structure of the above embodiment is more compact.

The first moving member 171 is connected to the second moving member 172 through the first elastic member 173, so that the first moving member 171 can drive the second moving member 172 to move together, and can move relative to the second moving member 172, and further: when the first moving member 171 moves reversely and separates from the locking mechanism 160 to release the locking member 161, the first moving member 171 will move relative to the second moving member 172, the first moving member 171 and the second moving member 172 overlap in the axial direction of the rotation axis 151, and then the first moving member 171 is driven to move, so the required moving space is relatively small.

Specifically, in the present embodiment, when the power tool 100 is switched from the working state shown in fig. 6 to the pull-back state shown in fig. 3, when the first moving member 171 is pulled to move leftward, the second moving member 172 is not moved, and the first elastic member 173 releases energy to provide the thrust force assisting the first moving member 171. When the power tool 100 is switched to the middle state shown in fig. 5, the first moving member 171 drives the second moving member 172 to move leftward together through the first elastic member 173 until the second moving member 172 pulls the working head 200 into the working head chamber 152. Thus, during the process of storing the working head 200, since the first elastic member 173 provides the boosting force, it is labor-saving to operate the first moving member 171 to release the locking mechanism 160.

In other embodiments, the first moving member 171 and the second moving member 172 may move synchronously at all times. The first moving member 171 and the second moving member 172 are fixedly coupled together without relative movement. At this time, similarly, when the working head 200 is sent into the accommodating hole 132 from the working head bin 152, the operation mechanism 170 is only required to be operated to transport and lock the working head 200. On the contrary, when the working head 200 in the receiving hole 132 is stored in the working head bin 152, the operating mechanism 170 is reversely moved, so that the operating mechanism 170 does not limit the locking mechanism 160 to release the working head, and then the operating mechanism 170 drives the working head 200 to move and finally enter the working head bin 152 to finish storage.

In some embodiments, as shown in fig. 3 and 4, the locking mechanism 160 further includes a locking sleeve 162, an operating sleeve 163, and a second elastic member 164. The second elastic member 164 is preferably a spring.

The locking sleeve 162 is axially movably fitted over the output shaft, having a first position releasing the locking member 161, as shown in fig. 3 and 4; a second position in which retaining member 161 is pressed against, as shown in fig. 6; there is also a third position for releasing the locking member 161 as shown in fig. 7. The first position, the second position, and the third position are sequentially distant from the head cartridge 152 in the axial direction of the rotation axis 151. In other words, the first position is closer to the working head cartridge 152, the second position is between the first position and the third position, and the locking sleeve 150 can move left and right centered on the second position. The locking sleeve 162 is capable of locking the retaining member 161 to the working head 200 in the second position. A second elastic member 164 is disposed between the locking sleeve 162 and the housing 110. The second elastic member 164 is configured to provide a driving force to move the locking sleeve 162 from the second position to the first position.

As shown in fig. 4, the operating sleeve 163 is axially movably sleeved outside the locking sleeve 162 and configured to drive the locking sleeve 162 to move from the second position to the third position. Specifically, a baffle 1624 is disposed outside the locking sleeve 162, and one end of the operating sleeve 163 extends between the baffle 1624 and the housing 110, so that when the operating sleeve 163 moves rightward, the baffle 1624 can drive the locking sleeve 162 to move from the second position to the third position.

In this embodiment, the first moving member 171 abuts against the operating sleeve 163, and the operating sleeve 163 abuts against the lock sleeve 162, so that the lock sleeve 162 can be held at the second position against the resistance of the second elastic member 164. When the operating state of the power tool 100 is switched to the pull-back state, the first moving member 171 is moved leftward to no longer give a rightward pushing force to the operating sleeve 163, the locking sleeve 162 is moved leftward by the elastic force of the second elastic member 164 and releases the locking member 161, and the movement of the locking sleeve 162 brings the operating sleeve 163 together.

In this embodiment, the manual unlocking function can be realized by using the operation sleeve 163. Specifically, when the power tool 100 is in the operating state shown in fig. 6: pulling the operating sleeve 163 to the right, the operating sleeve 163 moves the locking sleeve 162 to the third position to release the locking member 161, as shown in fig. 7; at this time, if the working head 200 is pulled out, the working head 200 pushes the locking member 161 to move outward along the radial direction of the output shaft 130, that is, the locking member 161 cannot lock the working head 200, and the working head 200 can be pulled out. If the power tool 100 is in the working state shown in fig. 6 but the working head 200 is not accommodated in the output shaft 130, the sleeve 163 can be operated to manually unlock the working head 200, and then the working head 200 is inserted, and the locking member 161 is pushed to move to the outside of the output shaft 130 along the radial direction of the output shaft 130 when the working head 200 is inserted, that is, the locking member 161 cannot lock the working head 200, and the working head 200 can be inserted.

Further, in order to avoid the operation sleeve 163 from being moved rightward, the first moving member 161 unexpectedly continues to be moved rightward. In this embodiment, the casing 110 further has a limiting portion 118 on a path of the first moving member 161 moving to the right. The end of the operating sleeve 163 is closer to the first moving member 161 than the stopper 118.

In some embodiments, as shown in fig. 4, the inner wall of the locking sleeve 162 is formed with a stepped portion, the top of the stepped portion is formed with a pressing surface 1621 capable of pressing the locking member 161, both sides of the stepped portion are formed with a first release surface 1622 and a second release surface 1623, and the inner diameter of the locking sleeve 162 at the pressing surface 1621 is smaller than the inner diameter at the first release surface 1622 and smaller than the inner diameter at the second release surface 1623.

When the locking sleeve 160 is in the first position, i.e. the position shown in fig. 3, 4 and 5, the first release surface 1622 corresponds to the position of the locking member 161 and the locking member 161 is in the released state. When the locking sleeve 160 is in the second position, i.e. the position shown in fig. 6, the clamping surface 1621 corresponds to the position of the locking member 161, and the locking member 161 is in the locked state. When the locking sleeve 160 is in the third position, i.e. the position shown in fig. 7, the second release surface 1623 corresponds to the position of the locking member 161 and the locking member 161 is again in the released state.

The following describes a usage scenario of the power tool according to an embodiment of the present invention.

When the power tool 100 is switched from the pull-back state to the working state, the specific operation and working process are as follows:

as shown in fig. 3, the power tool 100 is in a pull-back state. The first moving member 171 is pulled to move to the right, the first moving member 171 pushes the second moving member 172 to move through the first elastic member 173, and then the second moving member 172 pushes the working head 200 in the working head chamber 152 to move to the right. When the power tool 100 is in the intermediate state shown in fig. 5, the second moving member 172 is restrained by the housing 110 and cannot move any further, and the working head 200 is pushed to the position. The first moving member 171 is continuously pushed rightwards, the first moving member 171 continuously moves rightwards against the resistance of the first elastic member 173, the first moving member 171 pushes the operating sleeve 163 to move rightwards, the operating sleeve 163 drives the locking sleeve 162 to move rightwards, the compressing surface 1621 moves to a position corresponding to the locking member 161, and the compressing surface 1621 forces the locking member 161 to move inwards of the output shaft 130 along the radial direction of the output shaft 130, so that the working head 200 is locked, as shown in fig. 6.

When the power tool 100 is switched from the working state to the pull-back state, the operation and working process are reversed, specifically as follows:

the first moving member 171 is pulled to move leftward, and the locking sleeve 162 moves leftward by the second elastic member 164 and drives the operating sleeve 163 to move leftward. When the power tool 100 is in the intermediate state shown in fig. 4, the second release surface 1623 corresponds in position to the locking member 161, and the locking member 161 is unlocked. The first moving member 171 is pulled to move leftward, and the first moving member 171 drives the second moving member 172 to move leftward together through the first elastic member 163. Under the action of the magnetic element 1721, the working head 200 moves leftwards along with the second moving element 172, and finally the working head 200 enters an empty working head bin, and the power tool 100 is switched to a pull-back state. At this time, the working head 200 can be replaced by rotating the storage clip 150.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A power tool, comprising:

a housing;

a motor disposed in the housing to output a rotational power;

a reduction gearbox connected to a drive shaft of the motor for transferring rotational motion of the motor to the output shaft;

the storage clamp is provided with a plurality of working head bins capable of containing the working heads, the storage clamp is provided with a rotating axis, and the storage clamp can rotate to a position, corresponding to the accommodating hole, of one of the working head bins around the rotating axis; the working head bins are at least partially overlapped with the motor and the reduction gearbox in the axial direction of the rotating axis, and a plurality of working head bins are distributed around the reduction gearbox.

2. The power tool of claim 1, wherein the storage clip has an axially extending cavity along the axis of rotation, the plurality of working head cartridges being distributed around the cavity in a circumferential direction about the axis of rotation, the reduction gearbox being at least partially housed in the cavity.

3. The power tool of claim 2, wherein the reduction gearbox includes an input assembly connected to a drive shaft of the motor, a connecting shaft transmitting power of the input assembly to the output shaft, wherein the input assembly and the connecting shaft are aligned in an axial direction of the rotational axis.

4. The power tool of claim 1, further comprising:

5. The power tool of claim 4, wherein the operating mechanism comprises a first moving member for applying a force to the locking mechanism to lock the locking member, a second moving member for moving the working head, and the first moving member and the second moving member are connected by a first elastic member.

6. The power tool of claim 5, wherein the movement process of the first moving member to lock the locking member comprises a first stroke and a second stroke, and in the first stroke, the second moving member and the first moving member move synchronously to drive the working head to enter the accommodating hole; in the second stroke, the second moving part is kept still, and the first moving part overcomes the resistance of the first elastic part and continuously applies acting force to the locking mechanism.

7. The power tool of claim 4, wherein the locking mechanism further comprises:

8. The power tool of claim 7, wherein the locking sleeve has a pressing surface against which the retaining member can be pressed, the pressing surface being formed with first and second release surfaces on opposite sides thereof, the locking sleeve having an inner diameter at the pressing surface that is smaller than the inner diameter at the first release surface and smaller than the inner diameter at the second release surface.

9. The power tool of claim 8, wherein the inner wall of the locking sleeve is formed with a step, the top surface of the step forms the pressing surface, and the inner walls of the locking sleeve on both sides of the step form the first and second release surfaces, respectively.

10. The power tool of claim 7, wherein at least one side of the output shaft is provided with the locking member.