Tool attachment for a power assisted tool

Abstract

The application relates to a tool attachment device for a power tool. The tool attachment device for feeding nails to a power tool comprises a housing assembly, one side of which is formed with a waist hole; a rocker, which is partially arranged in the waist hole and can rotate in the waist hole; a connecting device, which is connected with the rocker and rotates synchronously; the tool attachment device further comprises a driving wheel, which is formed with a nail feeding structure in the circumferential direction; a transmission structure, which is connected with the driving wheel and the connecting device and drives the driving wheel to rotate in one direction; and the transmission structure is arranged between the connecting device and the driving wheel. The arrangement of the transmission structure and the driving wheel of the tool attachment device makes the overall structure compact.

Description

TECHNICAL FIELD

[0001] The present application relates to a tool attachment device for assisting a power tool in driving nails. BACKGROUND

[0002] Output tools that provide a rotational output force, such as screwdrivers, hammer drills, can be used to assist in driving nails, but the user has to hold the screwdriver, which reduces work efficiency and the user is also prone to injury. There is a tool attachment device for assisting a power tool in driving nails, which can feed nails to the power tool and facilitate user operation. In order to achieve the assistance in feeding nails by the tool attachment device, the mechanism of the tool attachment device is usually complex and large in size, which is not conducive to the improvement of portability, thereby increasing the use burden of the user. SUMMARY

[0003] In order to solve the problems in the prior art, the purpose of the present application is to provide a tool attachment device, the transmission structure and the driving wheel of which are arranged to make the overall structure compact.

[0004] The present application provides a tool attachment device for feeding nails to a power tool, comprising: a housing assembly, one side of the housing assembly being formed with a waist hole; a rocker, the rocker being partially arranged in the waist hole and being rotatable in the waist hole; a connecting device, the connecting device being connected with the rocker and being rotatable synchronously with the rocker; the tool attachment device further comprises: a driving wheel, a nail feeding structure being formed on the periphery of the driving wheel; a transmission structure, the transmission structure being connected with the driving wheel and the connecting device and driving the driving wheel to rotate in one direction; the transmission structure being arranged between the connecting device and the driving wheel.

[0005] Optionally, the connecting device comprises a rotating disc and a first engagement portion arranged on one side of the rotating disc, the first engagement portion being in one-way rotation-stopping connection with the transmission structure.

[0006] Optionally, the transmission structure comprises a first ratchet wheel, a second ratchet wheel and a central shaft; the first ratchet wheel comprises first ratchet teeth and a first shaft hole; the second ratchet wheel comprises second ratchet teeth and a second shaft hole; the central shaft passes through the first shaft hole and / or the second shaft hole.

[0007] Optionally, a plurality of first ratchet teeth are arranged on one side of the first ratchet wheel and surround the first shaft hole, the first ratchet teeth forming a stepped inclined surface and a stop surface; the first engagement portion forms first rotation-stopping ratchet teeth arranged opposite to the first ratchet teeth.

[0008] Optionally, the transmission structure further comprises an elastic element, the elastic element being arranged between the first ratchet wheel and the second ratchet wheel.

[0009] Optionally, the driving wheel comprises: a rotating drum, the rotating drum forms a receiving cavity, the transmission structure is arranged in the receiving cavity, the rotating drum comprises a first connecting part, the transmission structure forms a second connecting part, and the rotating drum and the transmission structure are connected through the first connecting part and the second connecting part; a wheel disc is fixedly connected with the rotating drum, and the nail feeding structure is uniformly distributed in the circumferential direction of the wheel disc; the shell further comprises: a second engaging part, the second engaging part is formed in the second anti-rotation ratchet teeth which are symmetrically distributed.

[0010] Optionally, the driving wheel is fixedly connected with a central shaft, and the central shaft is synchronously rotationally connected with the first ratchet wheel; the driving wheel comprises a second engaging part, and the second engaging part is formed in the second anti-rotation ratchet teeth which are symmetrically distributed.

[0011] Optionally, one side of the rotating disc forms a mounting groove, and the first engaging part constitutes a side wall of the mounting groove; the transmission structure comprises an elastic element, the elastic element is arranged in the mounting groove and can rotate in the mounting groove in one direction.

[0012] Optionally, the transmission structure comprises a central shaft, the central shaft is fixedly connected with the elastic element, the elastic element forms at least two extension arms, and the first engaging structure is arranged to limit the extension arms to rotate in the mounting groove in one direction only.

[0013] Optionally, the shell assembly comprises: a main shell; a nail feeding shell, the nail feeding shell is movable back and forth along the nail feeding direction relative to the main shell; a guide structure is formed in the nail feeding shell; and the tool attachment device further comprises: an extension rod, the extension rod drives the screw to rotate through the guide structure. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a perspective view of a tool attachment device of an embodiment of the present application installed on a power tool;

[0015] Figure 2 is a schematic view of a power tool system in the present application Figure 1 ;

[0016] Figure 3 is a plan view of a tool attachment device of the present application Figure 1 ;

[0017] Figure 4 is an internal schematic view of a tool attachment device of the present application Figure 1 ;

[0018] Figure 5 is a cross-sectional schematic view of a tool attachment device of the present application Figure 1 ;

[0019] Figure 6 is an internal structure schematic view of a nail feeding assembly of a tool attachment device of the present application Figure 1 ;

[0020] Figure 7 is a schematic diagram of the internal structure of a nail feeding assembly of a tool attachment device according to the present invention Figure 1

[0021] Figure 8 is a schematic diagram of the internal structure of a drive wheel of a tool attachment device according to the present invention Figure 1

[0022] Figure 9 is a schematic diagram of the internal structure of a drive assembly of a tool attachment device according to the present invention Figure 1

[0023] Figure 10 is a schematic diagram of the internal structure of a drive assembly of a tool attachment device according to the present invention Figure 1

[0024] Figure 11 is a schematic diagram of the internal structure of a nail feeding housing of a tool attachment device according to the present invention Figure 1

[0025] Figure 12 is a schematic diagram of the internal structure of a nail feeding assembly of a tool attachment device according to an embodiment of the present invention

[0026] Figure 13 is a schematic diagram of the internal structure of a housing assembly of a tool attachment device according to the present invention Figure 1

[0027] Figure 14 is a schematic diagram of the internal structure of a tool attachment device according to an embodiment of the present invention

[0028] Figure 15 is a schematic diagram of the internal structure of a tool attachment device according to the present invention Figure 14

[0029] Figure 16 is a schematic diagram of the internal structure of a mounting device of a tool attachment device according to the present invention Figure 14

[0030] Figure 17a , Figure 17b and Figure 17c is a schematic diagram of the internal structure of a tool attachment device according to the present invention Figure 14

[0031] Figure 18a is a schematic diagram of the internal structure of a tool attachment device according to the present invention Figure 14

[0032] Figure 18b is a schematic diagram of the internal structure of a tool attachment device according to the present invention Figure 14

[0033] Figure 18c is a schematic diagram of the internal structure of a tool attachment device according to the present invention Figure 14 ​​​​​​​​​​​Another stopper of the tool attachment device of Figure 19a 、 Figure 19b And Figure 19c is a structural diagram of a nail feeding assembly of an embodiment of the present application;

[0034] Figure 20 is a plan view of a power tool system of an embodiment of the present application;

[0035] Figure 21 is Figure 20 a cross-sectional view of the tool attachment device of

[0036] Figure 22 is Figure 20 a cross-sectional view of the tool attachment device of

[0037] Figure 23 is Figure 20 a cross-sectional view of the tool attachment device of

[0038] Figure 24 is Figure 20 a structural diagram of a switching device and a mounting device of the tool attachment device of

[0039] Figure 25 is a cross-sectional view of the tool attachment device of an embodiment of the present application;

[0040] Figure 26 is Figure 25 a three-dimensional structural diagram of a dustproof device and a mounting device of the tool attachment device of

[0041] Figure 27 is Figure 25 a three-dimensional structural diagram of a dustproof device and a mounting device of the tool attachment device of

[0042] Figure 28 is a dust flow path in the interior of the tool attachment device without the dustproof device;

[0043] Figure 29 is Figure 27 a dust flow path in the interior of the tool attachment device. DETAILED DESCRIPTION

[0044] Referring to Figure 1 and Figure 2The present application provides a power tool system, the power tool system comprises a power tool and a tool attachment device, the tool attachment device 100 is used for assisting the power tool 200 to drive nails, which can feed nails to the power tool 200, and facilitates the operation of the user. The power tool 200 is an output tool that can provide a rotating output force, such as a screwdriver or a hammer drill, and the power tool 200 comprises an output part 230 driven to rotate by a motor, the output part 230 can rotate around a first axis 101 and drive a workpiece to rotate. The tool attachment device 100 is detachably connected to the front end of the power tool 200, and realizes the nail feeding of the power tool 200.

[0045] With reference to Figure 3 and Figure 4 , the tool attachment device 100 comprises a housing assembly 110, a nail feeding assembly 120 and a mounting device 130, the nail feeding assembly 120 is supported by the housing assembly 110 and can feed a screw along the direction of the first axis 101. The mounting device 130 is arranged in the housing assembly 110 and is used for connecting the front end of the power tool 200, the housing assembly 110 comprises a main housing 111 and a nail feeding housing 112, the main housing 111 and the nail feeding housing 112 are slidingly connected, and the nail feeding assembly 120 is arranged in the nail feeding housing 112 and is supported by the nail feeding assembly 120. The nail feeding housing 112 can move back and forth along the nail feeding direction relative to the main housing 111. Optionally, the nail feeding housing 112 is a two-half structure, and the inside of the two-half structure forms a space for accommodating the nail feeding assembly 120 after being spliced, thereby facilitating assembly.

[0046] With reference to Figure 4 , the main housing 111 is provided with an extension rod 1111, the end of the extension rod 1111 is arranged to be supported by the rear end of the housing assembly 110, and the extension rod 1111 is rotationally connected with the main housing 111. The end of the extension rod 1111 forms a connecting structure for rotationally connecting with a tool bit, after the power tool 200 is connected to the tool attachment device 100, the output part 230 is arranged in the connecting structure at the rear end of the extension rod 1111, so that the power tool 200 can drive the extension rod 1111 to rotate. The front end of the extension rod 1111 is arranged to be similar to the structure of the tool bit, so that the extension rod 1111 can drive the screw to rotate to realize the nail driving function.

[0047] With reference to Figure 3 and Figure 4A slotted hole 113 is formed on one side of the nail feeding housing 112. The nail feeding assembly 120 includes a rocker arm 121, which is partially inserted into the slotted hole 113 and can slide within it. A guide rail 114 is formed on one side of the main housing 111. The guide rail 114 includes an inclined guide rail 1141 and a horizontal guide rail 1142. The inclined guide rail 1141 communicates with the horizontal guide rail 1142, and the horizontal guide rail 1142 is set parallel to the first axis 101 where the nail feeding direction is located. The rocker arm 121 is simultaneously inserted into both the slotted hole 113 and the guide rail 114. The rocker arm 121 can slide between a starting position and an ending position within the slotted hole 113. When the rocker arm 121 is in the starting position within the slotted hole 113, it is simultaneously located within the inclined guide rail 1141 of the guide rail 114, and the dimensions of the inclined guide rail 1141 and the slotted hole 113 are correspondingly set. As the user-operated tool attachment 100 moves toward the workpiece, the feeding housing 112 slides relative to the main housing 111, thereby approaching the rear end of the main housing 111. The inclined guide rail 1141 pushes the rocker arm 121 to slide from the starting position to the end position within the waist hole 113. When the rocker arm 121 enters the end position of the waist hole 113, it simultaneously enters the linear track. As the feeding housing 112 continues to slide relative to the main housing 111, the rocker arm 121, located at the end position of the waist hole 113, slides within the horizontal guide rail 1142.

[0048] Reference Figure 6 , Figure 7 The nail feeding assembly 120 also includes a connecting device 140, which is connected to and slides synchronously with the rocker arm 121. The connecting device 140 includes a rotating disk 141. When the rocker arm 121 rotates as the user presses the nail feeding housing 112, the rotating disk 141 rotates accordingly as the rocker arm 121 rotates from the starting position to the end position. When the rocker arm 121 moves to the end position, the connecting device 140 has rotated one stroke.

[0049] Reference Figure 8 The rivet feeding assembly 120 also includes a drive wheel 150, on which a rivet feeding structure 151 is formed in the circumference. The rivet feeding structure 151 is a protrusion and is evenly distributed radially in the circumference of the drive wheel 150. The rivet feeding structure 151 can cooperate with the rivet strip, fixing the rivet strip through multiple protrusions. The rivet strip is provided with screws. The rotation of the drive wheel 150 delivers the screws on the rivet strip to the front end of the extension rod 1111, thereby causing the extension rod 1111 to drive the screws to rotate and push the screws into the workpiece.

[0050] Reference Figure 9 , Figure 10 as well as Figure 11The nail feeding assembly 120 also includes a transmission structure 160, which connects the drive wheel 150 and the connecting device 140 and drives the drive wheel 150 to rotate in one direction. The transmission structure 160 is positioned between the connecting device 140 and the drive wheel 150. The transmission structure 160 can drive the nail feeding assembly 120 to rotate around a first direction 102, and the transmission structure 160 can also rotate relative to the nail feeding assembly 120 around a second direction 103 opposite to the first direction 102. The first direction 102 can be counterclockwise, and the second direction 103 is clockwise. The transmission structure 160 and the drive wheel 150 form a one-way anti-rotation connection; similarly, the transmission structure 160 and the connecting device 140 form a one-way anti-rotation connection. The transmission structure 160 and the connecting device 140 are anti-rotating connected in the first direction 102, so that the user can rotate the rocker arm 121 by pressing the nail feeding housing 112. Because the transmission structure 160 and the drive wheel 150 are anti-rotating connected in the first direction 102, the connecting device 140 drives the transmission structure 160 to rotate. The transmission structure 160 and the one-way drive wheel can rotate relative to each other in the second direction 103. When the user stops pressing the nail feeding housing 112, the nail feeding housing 112 slides relative to the main housing 111, moving away from the end of the main housing 111. This causes the rocker arm 121 to be driven by the waist hole 113 to return from the end position to the starting position. At this time, when the rocker arm 121 rotates, it drives the connecting device 140 to rotate around the second direction 103. The transmission structure 160 causes the drive wheel 150 to stop rotating when the connecting device 140 rotates around the second direction 103. This prevents the drive wheel 150 from driving the nail strip to rotate around the second direction 103. Therefore, when the user presses the nail feeding housing 112 again, the drive wheel 150 drives the next screw on the nail strip to the front end of the extension rod 1111, thereby realizing the sequential delivery of the screws on the nail strip to the front end of the extension rod 1111.

[0051] Reference Figure 5 The housing assembly 110 further includes a guide structure 118 formed within the nail feeding housing 112. The guide structure 118 includes a first guide structure 1181 and a second guide structure 1182. A first guide through hole 1183 is formed in the first guide structure 1181, and a second guide through hole 1184 is formed in the second guide structure 1182. The first guide structure 1181 and the second guide structure 1182 are connected, allowing the first guide through hole 1183 and the second guide through hole 1184 to communicate. The second guide structure 1182 includes a guide bracket and a guide tube. The second guide through hole 1184 is formed within the guide tube. The guide tube is made of metal, and the guide bracket is made of plastic, thereby ensuring the strength of the guide structure 118, reducing costs, and facilitating assembly.

[0052] Reference Figure 9 , Figure 10 as well asFigure 11 The transmission structure 160 comprises a first ratchet wheel 161, a second ratchet wheel 162 and a center shaft 163. The first ratchet wheel 161 comprises a first ratchet tooth 1611 and a first shaft hole 1612, and the center shaft 163 has a center line passing through the shaft center. The second ratchet wheel 162 comprises a second ratchet tooth 1621 and a second shaft hole 1622, and the center shaft 163 passes through the first shaft hole 1612 and the second shaft hole 1622. It can be understood that the center shaft 163 can be two shaft bodies passing through the center line, which are respectively fixedly connected to the two half shells of the nail feeding shell 112, and the two shaft bodies are not connected. A plurality of first ratchet teeth 1611 are arranged on one side of the first ratchet wheel 161 and surround the first shaft hole 1612. The first ratchet tooth 1611 forms a stepped slope 1613 and a stop surface 1614. The connecting device 140 further comprises a first meshing portion 142 arranged on one side of the rotating disc 141, which forms a one-way rotation-stopping connection with the transmission structure 160 through the first meshing portion 142. The first meshing portion 142 forms a first rotation-stopping ratchet tooth symmetrically distributed with the first ratchet tooth 1611, and the first ratchet tooth 1611 and the first rotation-stopping ratchet tooth form meshing connection. The first ratchet tooth 1611 is formed on one side of the first ratchet wheel 161 and uniformly surrounds the first shaft hole 1612. The stop surface 1614 is perpendicular to the side of the first ratchet wheel 161. The stepped slope 1613 is connected with the stop surface 1614, and the connection between the stepped slope 1613 and the stop surface 1614 is the farthest vertical distance of the stepped slope 1613 relative to the side of the first ratchet wheel 161. Each stepped slope 1613 approaches the side of the first ratchet wheel 161 along the first direction 102, and the plurality of first ratchet teeth 1611 are continuously arranged to form a ring body.

[0053] The first rotation-stopping ratchet tooth is similar in structure to the first ratchet tooth 1611. The first rotation-stopping ratchet tooth is generated on the inner side of the rotating disc 141 and is oppositely arranged with the first ratchet tooth 1611. The first rotation-stopping ratchet tooth also generates a stepped slope and a stop surface 1614. The inclination direction of the stepped slope of the first rotation-stopping ratchet tooth is complementarily arranged with the inclination direction of the stepped slope 1613 of the first ratchet tooth 1611, so that the stepped slope of each first rotation-stopping ratchet tooth approaches one side of the first meshing portion 142 along the second direction 103. When the connecting device 140 rotates along the first direction 102, the first meshing portion 142 and the first ratchet tooth 1611 are meshed, so that the connecting device 140 and the transmission device rotate synchronously. When the connecting device 140 rotates along the second direction 103, the first meshing portion 142 and the first ratchet tooth 1611 form relative sliding rotation through the cooperation of the stepped slopes.

[0054] The transmission structure 160 further comprises an elastic element 164 disposed between the first ratchet wheel 161 and the second ratchet wheel 162, which can be a spring or other device capable of storing energy by compression. The elastic element 164 is compressed by the first ratchet wheel 161 and the second ratchet wheel 162, and the elastic element 164 provides a biasing force that biases the first ratchet wheel 161 towards the first engagement portion 142. When the first ratchet wheel 161 rotates relative to the first engagement portion 142 in the second direction 103, the stepped surfaces of the two cause the first ratchet wheel 161 to slide along the central axis 163 and away from the first engagement portion 142, so that the elastic element 164 acts on the first ratchet wheel 161 to restore the first ratchet wheel 161 and the first engagement portion 142 to engagement.

[0055] The drive wheel 150 comprises a barrel 152 and a disc 153, the barrel 152 forms a receiving cavity in which the transmission structure 160 is disposed, and the barrel 152 and the disc 153 are fixedly connected to achieve synchronous rotation of the barrel 152 and the disc 153. The inner wall of the barrel 152 forms a first connecting portion 1521, and the transmission structure 160 comprises a second connecting portion 165, through cooperation of the first connecting portion 1521 and the second connecting portion 165, synchronous rotation of the transmission structure 160 and the drive wheel 150 is achieved. The drive wheel 150 is provided with only one, and is disposed opposite the connecting device 140, so that the nail feeding assembly is compact. Alternatively, the first connecting portion 1521 is a protruding structure formed on the inner wall of the drive wheel 150, and is disposed parallel to the central axis 163, the second connecting portion 165 is a groove structure formed on the first ratchet wheel 161 and the second ratchet wheel 162, and is also disposed parallel to the central axis 163, the first connecting portion 1521 can be disposed in the second connecting portion 165, so that the first ratchet wheel 161 and the second ratchet wheel 162 are synchronously rotated with the drive wheel 150 around the central axis, and the first ratchet wheel 161 and the second ratchet wheel 162 can be displaced relative to the drive wheel 150 in a direction parallel to the central axis. Alternatively, the first connecting portion 1521 forms a groove 135 structure, and the second connecting portion 165 forms a protruding structure, which can also achieve synchronous rotation of the transmission structure 160 and the drive wheel 150.

[0056] The nail feeding structures 151 are uniformly distributed in the circumferential direction of the disc 153, and the nail feeding structures 151 are protrusions formed on the surface of the disc 153 and are equally spaced from each other. The nail strip is installed through the nail feeding structures 151, so that the drive wheel 150 rotates to drive the nail strip to rotate to feed the nails to the front end of the extension rod 1111.

[0057] The housing assembly further comprises a second engaging portion 115, which is formed by a second set of symmetrical distributed stopper ratchets 1621. The second ratchet 162 and the second engaging portion 115 are oppositely arranged, such that when the first ratchet 161 and the second ratchet 162 rotate synchronously with the driving wheel 150 in the first direction 102, the second ratchet 162 and the second engaging portion 115 can slide relative to each other, and when the transmission structure 160 has a tendency to move in the second direction 103, the second ratchet 162 is stopped by the mutual engagement of the second set of stopper ratchets 1621 and the second engaging portion 115. Since the second ratchet 162 is connected to the driving wheel 150 for synchronous rotation, the driving wheel 150 will not rotate in the second direction 103. The second ratchet 162 is similar in structure to the first ratchet 161, and the second engaging portion 115 is similar in structure to the first engaging portion 142, which will not be described in detail here.

[0058] The spacing of the nail feeding structure 151 on the driving wheel 150 and the size of the waist hole 113 are matched, such that one stroke of the rocker 121 in the waist hole 113 from the starting position to the end position corresponds to the feeding of one screw by the corresponding nail feeding structure 151. Thus, through the cooperation of the transmission structure 160, the driving wheel 150, and the connecting device 140, the user can trigger the rocking of the rocker 121 by pressing the nail feeding housing 112 relative to the main housing 111 to drive the connecting device 140 to rotate in the first direction 102, drive the transmission assembly to rotate in the first direction 102 through the engagement of the first engaging structure on the connecting device 140 and the first ratchet 161, and thus drive the driving wheel 150 to rotate and feed the nail. A spring is further provided between the main housing 111 and the nail feeding housing 112, which pushes the nail feeding housing 112 back to the front end of the main housing 111 when the user no longer presses the nail feeding housing 112, so that the rocker 121 rotates in the second direction 103 from the end position to the starting position, and the second ratchet 162 and the second engaging portion 115 are engaged to stop the driving wheel 150 from rotating. The first ratchet 161 and the first engaging portion 142 can rotate relative to each other, so that the first ratchet 161 does not prevent the rotation of the connecting device 140. This structure can reduce the overall size of the nail feeding assembly 120 by arranging the transmission assembly between the driving wheel 150 and the connecting device 140, and arranging the elastic element 164 between the first ratchet 161 and the second ratchet 162. The driving wheel 150 is used to feed the nail instead of a double-sided driving wheel, and the driving wheel 150 simultaneously realizes the packaging and positioning of the transmission assembly, simplifies the structure, and realizes accurate nail feeding of the power tool 200 with fewer parts, reduces cost, and facilitates assembly.

[0059] Reference Figure 12In one embodiment, the transmission structure 160a includes a first ratchet wheel 161a, a second ratchet wheel 162a, and a central shaft 163a. The first ratchet wheel 161a includes a first ratchet tooth 1611a and a first shaft hole, and the central shaft 163a has a center line passing through the shaft center thereof. The second ratchet wheel 162a includes a second ratchet tooth 1621a and a second shaft hole, and the central shaft 163a passes through the first shaft hole and the second shaft hole. The driving wheel 150a is fixedly connected with the central shaft 163a, and the central shaft 163a and the first ratchet wheel 161a are synchronously rotationally connected. The transmission structure 160a further includes an elastic element 164a arranged between the first ratchet wheel 161a and the second ratchet wheel 162a. The nail feeding assembly further includes a connecting device 140a connected with the transmission structure 160a.

[0060] The driving wheel 150a includes a second engagement portion 115a formed by the second ratchet tooth 1621a symmetrically distributed on the second ratchet wheel 162a. The driving wheel 150a is fixedly connected with the central shaft 163a, and the central shaft 163a and the first ratchet wheel 161a are synchronously rotationally connected. The central shaft 163a is provided with a connecting piece 1631a arranged in the first ratchet wheel 161a to fixedly connect the first ratchet wheel 161a and the central shaft 163a.

[0061] The second ratchet wheel 162a and the second ratchet wheel constitute a one-way rotation-stopping connection. When the connecting device 140a rotates along the first direction 102a, the first ratchet wheel 161a is driven to rotate synchronously, and the first ratchet wheel 161a drives the central shaft 163a to rotate through the connecting piece 1631a, so that the driving wheel 150a rotates along the first direction 102a. When the rotating device rotates along the second direction 103a, the second ratchet wheel 162a restricts the second engagement portion 115a from rotating, so that the driving wheel 150a and the first ratchet wheel 161a do not rotate. In this embodiment, the transmission assembly and the driving wheel 150a are connected through the rotating shaft, which has the same simple structure, can enhance the size, and can improve the strength of the first ratchet wheel 161a and the second ratchet wheel 162a, and ensure the service life.

[0062] Referring to Figure 5 and Figure 13When the tool attachment device 100 is mounted on the power tool 200, the housing assembly 110 can be rotated relative to the power tool 200 and fixed to at least two positions, so as to facilitate the user to adjust the angle of the tool attachment device 100 and facilitate the operation. The mounting device 130 is arranged in the housing assembly 110 and rotatable relative to the housing assembly 110. The mounting device 130 comprises a sliding groove 131, a rotation-stopping connecting part 132 and a positioning device 133. The rotation-stopping connecting part 132 and the power tool 200 constitute a rotation-stopping connection. The sliding groove 131 is located in the mounting device 130 and forms an opening on the surface of the mounting device 130. The positioning device 133 comprises an elastic member 1331 and a stopper 1132. The stopper 1132 is arranged in the sliding groove 131 and abuts against the elastic member 1331. The stopper 1132 is slidable in the sliding groove 131, so as to have a position state in which the stopper is partially exposed outside the opening of the sliding groove 131, and another position state in which the stopper 1132 compresses the elastic member 1331 and slides to the inside of the sliding groove 131.

[0063] The housing assembly forms a containing space for placing the mounting device 130. The mounting device 130 is rotatable relative to the housing at an angle in the containing space. The housing assembly 110 comprises a plurality of limiting grooves 116. Optionally, the limiting grooves 116 are uniformly distributed in the axial direction of the containing space surrounding wall, and the positions of the limiting grooves 116 are aligned with the positions of the sliding groove 131, i.e. the limiting grooves 116 and the sliding groove 131 are located in the same radial direction of the first axis 101, so that the stopper can be located in any one of the limiting grooves 116 and the sliding groove 131 at the same time.

[0064] The stopper 1132 can be limited by the elastic member 1331 between the sliding slot 131 and the limiting slot 116. The limiting slots 116 form a partition, so that when the installation device 130 does not receive a large torque, the partition limits the displacement of the stopper 1132, so that the stopper 1132 is positioned between the limiting slot 116 and the sliding slot 131, so that the installation device 130 and the housing assembly 110 are rotationally connected. When the user needs to adjust the angle of the tool attachment device 100, the housing assembly 110 and the power tool 200 are relatively rotated, the torque of the installation device 130 by the power tool 200 is increased, so that the elastic member 1331 is compressed, so that the stopper 1132 is away from the limiting slot 116, and is no longer positioned between the limiting slot 116 and the sliding slot 131, at this time, the installation device 130 fixedly connected to the power tool 200 can rotate relative to the housing, when the installation device 130 rotates relative to the housing assembly 110, the positioning device 133 in the installation device 130 is rotated, so that the sliding slot 131 is aligned with or adjacent to the limiting slot 116 at other positions. When the user no longer applies torque to the installation device 130, the elastic member 1331 is released to drive the stopper 1132 to partially enter the limiting slot 116, so that the installation device 130 and the housing assembly 110 are rotationally connected again.

[0065] The sliding slot 131 is arranged in the installation device 130 to extend in the radial direction of the first axis 101, the stopper 1132 is arranged as a sphere, and the inner diameter of the opening of the sliding slot 131 is smaller than the diameter of the stopper 1132, so that the stopper 1132 cannot completely come out of the opening of the sliding slot 131.

[0066] Referring to Figure 13 , a connecting cavity is formed in the installation device 130 for the front end of the power tool 200 to be inserted, so that the power tool 200 and the installation device 130 are connected. The rotationally connected part 132 and the power tool 200 constitute a rotationally connected connection; the rotationally connected part 132 is a groove 135 formed on the inner side of the installation device 130, the front end of the power tool 200 forms an adapter part 210 for connecting the tool attachment device 100, the adapter part 210 is a protrusion 211 formed on the front end of the power tool 200, the protrusion 211 is arranged to be inserted into the groove 135 along the first axis 101. Alternatively, the rotationally connected part 132 is four grooves 135 formed on the inner wall of the installation device 130, the front end of the power tool 200 has four protrusions 211, and the grooves 135 extend on two mutually perpendicular straight lines, and the protrusions 211 extend on two mutually perpendicular straight lines.

[0067] In an embodiment, the housing assembly includes a positioning ring, the positioning ring is sleeved on the circumference of the positioning device, and the positioning ring is fixedly connected with the housing, and the limiting slot is formed on the inner circumference of the positioning ring.

[0068] Referring to Figures 14 to 16 In one embodiment, the tool attachment device 100b comprises a limiting ring 170b, a mounting device 130b disposed in the housing assembly 110b for connecting the front end of the power tool 200, and a stopper 1132b. The limiting ring 170b is disposed on the circumference of the front end of the mounting device 130b. The stopper 1132b is in abutment with the limiting ring 170b. The mounting device 130b comprises at least two mounting holes 134b. The stopper 1132b is disposed in the mounting hole 134b and biased by the limiting ring 170b, so that the stopper 1132b clamps the adapter 210, allowing the power tool 200 to be rotatable and fixed to at least two positions relative to the tool attachment device 100b.

[0069] Referring to Figure 17a , Figure 17b and Figure 17c The inner circumference of the mounting device 130b is provided with a groove 135b, and the front end of the power tool 200 forms a protrusion 211 which is disposed to be inserted into the groove 135b along the first axis 101b. The limiting ring 170b is a resilient member 1331b which biases the stopper 1132b to a locking position, so that when the power tool 200 is connected to the mounting device 130b, each stopper 1132b prevents the protrusion 211 from rotating in a certain direction relative to the tool attachment device 100b, thereby limiting the rotation of the protrusion 211 in two directions relative to the tool attachment device 100b through at least two stoppers 1132b, and serving as a relative fixing of the power tool and the housing assembly.

[0070] The stopper 1132b is a ball, and the protrusion 211 is disposed to be extruded to make the stopper 1132b disengage from the locking position. The stopper 1132b is disposed as at least two, and the protrusion 211 is disposed as at least two. When the power tool 200 is connected to the mounting device 130b, multiple stoppers 1132b clamp at least one protrusion 211, so that the power tool 200 is fixed in a certain position relative to the tool attachment device 100b.

[0071] Referring to Figure 18a , Figure 18b and Figure 18cThe stopper 1132b is arranged as N, and the convex rib 211 is arranged as M. In the cross section of the circumferential direction of the first axis 101b, N equally divided first positioning intervals 310, second positioning intervals 320 and Nth positioning intervals are respectively generated in the equally divided M intervals, and the stopper 1132b is arranged to pass through the first positioning interval 310, the second positioning interval 320 and the Nth positioning interval respectively.

[0072] Optionally, the stopper 1132b is arranged as three, the convex rib 211 is arranged as four, and the convex rib 211 is arranged to pass through a first straight line and a second straight line respectively, and the first straight line and the second straight line are arranged perpendicularly.

[0073] The stopper 1132b is arranged on the first positioning interval 310, the second positioning interval 320 and the third positioning interval 330 respectively. When the convex rib 211 is rotated to any two intervals of the first positioning interval 310, the second positioning interval 320 and the third positioning interval 330, the convex rib 211 is clamped by the two stoppers 1132b. This embodiment does not need to arrange the limiting groove 116b, and the multi-angle adjustment of the shell assembly 110b can be completed by the cooperation of the limiting ring 170b and the power tool 200. The structure is simple, the size of the shell assembly 110b can be reduced, and the angle adjustment of the shell assembly 110b is simply and effectively realized.

[0074] Referring to Figure 19a , Figure 19b and Figure 19c In an embodiment of the present application, the connecting device 140c comprises a rotating disc 141c and a first engaging part 142c arranged on one side of the rotating disc 141c, and the first engaging part 142c and the transmission structure 160c constitute one-way rotation stopping connection.

[0075] One side of the rotating disc 141c forms a mounting groove 1411c, and the first engaging part 142c constitutes a side wall of the mounting groove 1411c. The transmission structure 160c comprises an elastic driving element 166c, which is arranged in the mounting groove 1411c and can rotate in one direction in the mounting groove 1411c.

[0076] The transmission structure 160c comprises a center shaft 163c, the center shaft 163c is fixedly connected with the elastic driving element 166c, the elastic driving element 166c forms at least two extension arms 167c, the first engagement structure is arranged to limit the extension arms 167c to rotate in only one direction in the mounting groove 1411c. The first engagement part 142c forms a stepped slope and a stop surface 1614c on the side wall of the mounting groove 1411c, the stepped slope is connected with the stop surface 1614c, and the extension arm 167c is also arranged to be inclined. The driving wheel 150c is provided with a ratchet on one side, and the second engagement part 115c is formed on the corresponding nail feeding shell 112c, the second engagement part 115c and the ratchet constitute a one-way rotation stopping connection, and the specific principle is similar to the above-mentioned embodiment, which will not be described in detail here.

[0077] When the connecting device 140c rotates in the first direction 102c, the extension arm 167c abuts against the stop surface 1614c, so that the connecting device 140c and the elastic driving element 166c constitute a rotation stopping connection, and the connecting device 140c and the center shaft 163c rotate synchronously in the first direction 102c. When the connecting device 140c moves in the second direction 103c, the elastic driving element 166c elastically deforms to slide over the stop part from the stepped slope, so that the connecting device 140c rotates relative to the elastic driving element 166c. In this embodiment, the transmission structure 160c is arranged in the connecting device 140c, which can reduce the size of the whole machine and make the nail feeding assembly 120c simple and compact in structure.

[0078] Referring to Figure 20 and Figure 24 In an embodiment, the tool attachment device 100d further comprises a connecting hole 171 and a ball 172, the connecting hole 171 is arranged in the mounting device 130d and penetrates through the mounting device 130d to form an opening on both sides of the mounting device 130d, and the ball 172 is arranged in the connecting hole 171. The ball 172 is arranged as a sphere, and the ball 172 can roll in the connecting hole 171 and relatively move to a first position and a second position in the connecting hole 171. The diameter of the connecting hole 171 is matched with the diameter of the ball 172, so that the ball 172 can roll in the connecting hole 171, and part of the ball 172 can protrude relative to the connecting hole 171 without being separated from the connecting hole 171.

[0079] Referring to Figure 23 The tool attachment device 100d further comprises a switching device 180, the switching device 180 has a locked state and an unlocked state, referring to Figure 21 When in the locked state, the switching device 180 limits the ball 172 to be located in the first position which can connect the tool attachment device 100d and the power tool 200d, referring to Figure 22In the unlocked state, the switching device 180 allows the ball 172 to move between the first position and the second position within the connecting hole 171. The mounting device 130d is hollow inside to form a connecting cavity 136d, the power tool 200d is inserted into the connecting cavity 136d to connect to the mounting device 130d, so that the tool attachment device 100d and the power tool 200d are adaptively connected. The inside of the mounting device 130d forms a rotation-stopping connecting part 132d. The front end of the power tool 200d forms an adaptive part 210d, which can be rotation-stopping connected with the rotation-stopping connecting part 132d.

[0080] Optionally, the rotation-stopping connecting part 132d is a groove formed on the periphery of the connecting cavity 136d, and the adaptive part 210d is a convex rib correspondingly formed on the front end of the power tool 200d, which is pushed into the groove when the front end of the power tool 200d is inserted into the connecting cavity 136d, so that the power tool 200d and the tool attachment device 100d are rotation-stopping connected. Optionally, the inner wall of the mounting device 130d is provided with four grooves, and the front end of the power tool 200d is provided with four convex ribs, and the grooves extend on two mutually perpendicular straight lines, and the convex ribs extend on two mutually perpendicular straight lines.

[0081] The front end of the power tool 200d also has an adaptive groove 220d, which can be an annular groove arranged circumferentially on the front end of the power tool 200d, or a spherical groove arranged on the power tool 200d. The first limiting part 183 can limit the ball 172 between the adaptive groove 220d and the connecting hole 171, so as to limit the relative displacement of the power tool 200d and the tool attachment device 100d in the direction parallel to the first axis 101 through the ball 172, and the power tool 200d and the tool attachment device can be maintained in the connected state through the cooperation of the ball 172 and the groove. When the ball 172 is in the first position, part of the ball 172 extends from the connecting hole 171 into the connecting cavity 136d, and when the ball 172 is in the second position, the ball 172 does not exceed the connecting hole 171 in the direction towards the connecting cavity 136d.

[0082] Optionally, with reference to Figure 24The switching device 180 includes a locking member 181 and a switch 182, which are arranged outside the opening of the connecting hole 171. The locking member 181 includes a first limiting portion 183 and a second limiting portion 184. In the radial direction of the first axis 101, the first limiting portion 183 is closer to the first axis 101 than the second limiting portion 184. The switch 182 is connected to the locking member 181 and is used by a user to move the locking member 181. The locking member 181 is arranged outside the periphery of the mounting device. In the radial direction of the first axis 101, the first limiting portion 183 and the second limiting portion 184 can be operated to be aligned with the connecting hole 171, respectively. The locking member 181 is moved by moving the switch 182 to switch the limiting portion aligned with the connecting hole 171. When the first limiting portion 183 is operated to be aligned with the connecting hole 171, the first limiting portion 183 protrudes relative to the second limiting portion 184, thereby pressing the ball 172 so that the ball 172 is located at the first position. At this time, the switching device 180 is in the locked state. When the second limiting portion 184 is aligned with the connecting hole 171, the second limiting portion 184 is away from the connecting hole 171 relative to the first limiting portion 183. The second limiting portion 184 no longer presses the ball 172, so that the ball 172 can move between the first position and the second position of the ball 172 in the connecting hole 171. At this time, the switching device 180 is in the unlocked state.

[0083] Optionally, the switching device 180 further includes a biasing member 185 connected to the locking member 181. The biasing member 185 has a biasing force to maintain the switching device 180 in the locked state. The biasing member 185 is an elastic member and can be connected to the switch 182 or the locking member 181. When the switch 182 is not operated, the biasing member 185 presses the switch 182 or the locking member 181 to maintain the switching device 180 in the locked state. After the power tool 200d is connected to the mounting device 130d, the switch 182 is operated to make the switching device 180 in the unlocked state. At this time, the power tool 200d can be separated from the mounting device 130d.

[0084] The locking member 181 can be a step structure arranged at the front end of the connecting hole. Alternatively, the locking member 181 is a ring body sleeved on the periphery of the mounting device 130d, and the second limiting portion 184 has a slope or curved surface gradually approaching the first axis 101 in the direction of the first axis 101, so that when the user installs the power tool 200d on the mounting device 130d, the front end of the power tool 200d can be installed into the connecting cavity 136d along the direction of the first axis 101, the front end of the power tool 200d presses the ball 172 and drives the locking member 181 to move through the slope or curved surface, so that the switching device 180 moves to the unlocked state to allow the power tool 200d to be installed on the mounting device 130d. When the ball 172 is located between the adaptive groove 220d and the connecting hole 171, the biasing member 185 drives the locking member 181 to return to the locked state.

[0085] Alternatively, when the power tool 200d is installed on the mounting device 130d, the switching device 180 is maintained in the unlocked state by moving the switch 182, the power tool 200d is installed into the mounting device 130d, and the switching device 180 returns to the locked state when the switch 182 is released. At this time, the tool attachment device 100d and the power tool 200d are fixedly connected.

[0086] Alternatively, the connecting hole 171 and the ball 172 are provided in plurality, and when the switching device 180 is in the unlocked state, the mounting device 130d can rotate relative to the housing assembly 110d to change the ball 172 locked by the switching device 180. The switch 182 and the first limiting portion 183 and the second limiting portion 184 can also be provided in plurality for locking the plurality of balls 172, respectively.

[0087] Alternatively, the mounting device is integrally formed with the housing assembly, the connecting hole and the ball are arranged inside the housing assembly, and the switching device is arranged opposite to the mounting device, and the user can realize the locking connection and the unlocking connection of the power tool by driving the mounting device and the switching device to move relative to each other.

[0088] Alternatively, the mounting device 130d is arranged in the housing assembly 110d and can rotate relative to the housing assembly 110d. The mounting device 130d includes a sliding groove, the sliding groove is located in the mounting device 130d and forms an opening on the surface of the mounting device 130d, a positioning device, the positioning device includes an elastic member and a stopper, the stopper is arranged in the sliding groove and abuts against the elastic member, the housing assembly 110d includes a plurality of limiting grooves, and the ball 172 can be limited between the sliding groove and the limiting grooves by the elastic member. Alternatively, a nail feeding structure is formed in the circumference of the driving wheel, the tool attachment device 100d further includes a transmission structure, the transmission structure connects the driving wheel and the connecting device and drives the driving wheel to rotate in one direction, and the transmission structure is arranged between the connecting device and the driving wheel.

[0089] Alternatively, with reference toFigure 25 The mounting device 130e further comprises a groove 137e, and the housing assembly 110e comprises a web 117e, at least one of the groove 137e and the web 117e is annular, the groove 137e is clamped on the web 117e, so that the mounting device 130e and the housing assembly 110e are connected and can rotate around the first axis 101.

[0090] Referring to Figures 25 to 27 When the power tool system is in operation, the screw is driven into the workpiece by the extension rod 1111e, and dust and debris are easily generated at the front end of the tool attachment device 100e when the screw is screwed into the workpiece, and enter the connection between the mounting device 130e and the housing assembly 110e from the front end of the tool attachment device 100e, and enter between the web 117e and the groove 137e. Long-term accumulation of dust can cause the mounting device 130e and the housing assembly 110e to be blocked, thereby affecting the relative rotation of the power tool and the tool attachment device 100e. Here, the nail feeding assembly 120e is defined as being located at the front end of the mounting device 130e. In order to solve this problem, an embodiment of the present application provides that the tool attachment device 100e further comprises a dust removal device 190e, which is arranged between the mounting device 130e and the nail feeding assembly 120e to prevent dust generated during operation of the power tool system from entering between the mounting device 130e and the housing assembly 110e. Part of the dust generated during operation of the power tool system flows from the front end to the rear end of the mounting device 130e inside the housing assembly 110e of the tool attachment device 100e, and the dust removal device 190e prevents the dust from flowing between the mounting device 130e and the housing assembly 110e, so as to prevent the dust from blocking the relative rotation of the mounting device 130e and the housing assembly 110e. The dust removal device 190e further comprises a partition portion arranged at the front end of the mounting device 130e, the partition portion is attached to the inner wall of the housing assembly 110e, so as to block the flow of dust between the web 117e and the groove 137e, thereby preventing the dust from accumulating between the web 117e and the groove 137e to cause the mounting device 130e and the housing assembly 110e to be blocked.

[0091] The dust removal device 190e includes a dust removal box 191e and a dust removal port 192e. At least part of the dust removal port 192e is arranged towards the nail feeding assembly 120e, i.e. at least part of the dust removal port 192e is arranged towards the front end opening, so that the dust generated at the front end of the tool attachment device 100e enters the housing assembly 110e and then enters the dust removal box 191e through the dust removal port 192e. The dust removal box 191e further includes a dust removal cavity 193e, which is formed in the dust removal box 191e and used to receive the dust entering from the dust removal port 192e. Optionally, the dust removal cavity 193e is formed in the dust removal box 191e, and the dust removal cavity 193e is in communication with the connecting cavity 136e of the mounting device 130e, so that the dust entering the connecting cavity 136e inside the mounting device 130e from the dust removal port 192e can be discharged outside. The dust is discharged outside from the inside of the mounting device 130e and cannot enter the outside of the mounting device 130e, because the housing assembly 110e is arranged outside the mounting device 130e, so that the dust cannot enter between the housing assembly 110e and the mounting device 130e.

[0092] The dust removal port 192e includes a plurality of dust removal ports, which extend from the front end of the dust removal box 191e to the side end of the dust removal box 191e. Part of the dust can enter the dust removal cavity 193e from the side of the dust removal box 191e, so as to prevent the dust removal port 192e from being blocked by the dust.

[0093] Optionally, the dust removal device 190e and the mounting device 130e are integrally formed, and the dust removal cavity 193e is in communication with the connecting cavity 136e. The tool attachment device further includes a guide 195e for positioning the extension rod 1111e, which is connected with the dust removal device 190e and arranged at the front end of the dust removal device 190e. In the projection direction of the first axis 101, the dust removal port 192e is arranged at the side of the guide 195e, and optionally, the guide 195e is integrally formed with the dust removal device.

[0094] Referring to Figure 28 and Figure 29 , Figure 28 is the dust removal route w1 of the tool attachment device without the dust removal device, and the dust directly enters the connecting position between the mounting device and the housing assembly from the inside of the housing assembly, Figure 29 is the dust removal route w2 of the tool attachment device with the dust removal device, and the dust is guided by the dust removal device to be discharged from the connecting cavity of the mounting device. The mounting device in the embodiment can be any mounting device proposed in the present application.

[0095] Optionally, the dust discharging cavity 193e is directly formed on one side of the housing assembly 110e to form a dust discharging port 192e, and the dust discharging port 192e is arranged in front of the rib plate 117e, so that the dust generated at the front end is directly guided into the dust discharging cavity 193e from the dust discharging port 192e and discharged from one side of the housing assembly 110e without entering between the housing assembly 110e and the mounting device 130e.

[0096] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the above embodiments do not limit the present application in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation fall within the protection scope of the present application.

Claims

1. A tool attachment device for assisting a power tool to drive a nail, comprising: a housing assembly, one side of which forms a waist hole; a rocker, which is partially inserted into the waist hole and can rotate in the waist hole; a connecting device, which is connected with and rotates synchronously with the rocker; characterized in that the tool attachment device further comprises: a driving wheel, which forms a nail feeding structure in the circumferential direction of the driving wheel; the number of the driving wheel is one; a transmission structure, which connects the driving wheel and the connecting device and drives the driving wheel to rotate in one direction; the transmission structure is arranged between the connecting device and the driving wheel, the driving wheel comprises a rotating cylinder and a wheel disc, the wheel disc is arranged at both ends of the rotating cylinder opposite to the connecting device; the transmission structure comprises a first ratchet wheel and a second ratchet wheel, and further comprises an elastic element arranged between the first ratchet wheel and the second ratchet wheel.

2. The tool attachment device according to claim 1, characterized in that: the connecting device comprises a rotating disc and a first engaging part arranged on one side of the rotating disc, and the first engaging part forms a one-way rotation-stopping connection with the transmission structure.

3. The tool attachment device according to claim 2, characterized in that: the transmission structure further comprises a central shaft; the first ratchet wheel comprises first ratchet teeth and a first shaft hole; the second ratchet wheel comprises second ratchet teeth and a second shaft hole; the central shaft passes through the first shaft hole and / or the second shaft hole.

4. The tool attachment device according to claim 3, characterized in that: a plurality of the first ratchet teeth are arranged on one side of the first ratchet wheel and surround the first shaft hole, and the first ratchet teeth form a stepped inclined surface and a stop surface; the first engaging part forms first rotation-stopping ratchet teeth arranged opposite to the first ratchet teeth.

5. The tool attachment device according to claim 4, characterized in that: the rotating cylinder forms a receiving cavity, the transmission structure is arranged in the receiving cavity, the rotating cylinder comprises a first connecting part, the transmission structure forms a second connecting part, and the rotating cylinder and the transmission structure are connected through the first connecting part and the second connecting part; the wheel disc and the rotating cylinder are fixedly connected, and the nail feeding structure is uniformly distributed in the circumferential direction of the wheel disc; the housing assembly further comprises: a second engaging part, which forms second rotation-stopping ratchet teeth symmetrically distributed on the second ratchet teeth.

6. The tool attachment device according to claim 4, characterized in that: the driving wheel is fixedly connected with the central shaft, and the central shaft is synchronously rotationally connected with the first ratchet wheel; the driving wheel comprises a second engaging part, which forms second rotation-stopping ratchet teeth symmetrically distributed on the second ratchet teeth.

7. The tool attachment device according to claim 2, characterized in that: one side of the rotating disc forms a mounting groove, and the first engaging part forms a side wall of the mounting groove; the transmission structure comprises an elastic element, which is arranged in the mounting groove and can rotate in one direction in the mounting groove.

8. The tool attachment device according to claim 7, characterized in that: The transmission structure comprises a center shaft, the center shaft and the elastic element are fixedly connected, The elastic element forms at least two extension arms, the first engaging part is arranged to limit the extension arms to rotate in the installation slot in one direction only.

9. The tool attachment device of claim 1, wherein, Comprise: The housing assembly comprises: A main housing; A nail feeding housing, the nail feeding housing is movable back and forth along a nail feeding direction relative to the main housing; A guide structure formed in the nail feeding housing; The tool attachment device further comprises: An extension rod, the extension rod drives the screw to rotate through the guide structure.

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