Dust collection device and drilling tool assembly

Abstract

A dust collecting device for being mounted on a drilling tool, the dust collecting device comprising a main housing, a suction pipe assembly mounted on the main housing, the suction pipe assembly comprising an outer pipe telescopically arranged on the main housing, an inner pipe telescopically arranged in the outer pipe, a locking assembly for locking the inner pipe at different positions in the outer pipe, and a first stopper for limiting the rearward telescoping of the outer pipe, the outer pipe sidewall being provided with a first scale and a second scale arranged side by side, the first stopper being adjustably locked on the main housing with reference to the first scale and the second scale, by arranging the first scale and the second scale side by side on the outer pipe sidewall, the telescoping distance of the suction pipe assembly relative to the main housing is displayed by the first scale at at least one locking position and by the second scale at at least another locking position, so that the dust collecting device can accurately control the drilling depth when it is adapted to different length drill bits with different drilling depth requirements.

Description

Technical Field

[0001] This invention relates to the field of dust collection technology, and in particular to a dust collection device and a drilling tool assembly for use with a handheld drilling tool. Background Technology

[0002] Dust collection devices are typically used in conjunction with handheld drilling tools (such as electric hammers) to collect dust and other debris during drilling operations, preventing dust and other debris from accumulating in the workplace.

[0003] Existing dust collection devices, such as the one disclosed in Japanese Patent Publication No. JP6778560B2, use an operating ring located at the front end of the outer cylinder to lock the inner cylinder, which is retracted into the outer cylinder, to accommodate two sizes of drill bits. This type of dust collection device can only fix the inner cylinder when it is retracted into the outer cylinder. When a long drill bit is needed for short-stroke drilling, the inner cylinder can move freely relative to the outer cylinder, making it difficult to control the depth of the short-stroke drilling.

[0004] Therefore, it is indeed necessary to provide an improved dust collection device and an electric tool equipped with the dust collection device to overcome the defects of the prior art. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a dust collection device that can be used in multiple scenarios and an electric tool equipped with the dust collection device.

[0006] The technical solution adopted by the present invention to solve the problem of the prior art is: a dust collection device for installation on a drilling tool, the dust collection device including a main body housing, a dust collection box installed on the main body housing, and a suction tube assembly, the suction tube assembly including an outer tube axially movable on the main body housing, an inner tube axially movable in the outer tube, a locking component, and a first stop portion restricting the rearward movement of the outer tube, the inner tube having a suction port at its front end, and a dust guiding channel forming in the suction tube assembly communicating with the suction port to the dust collection box; characterized in that: a stop block is provided at the other end of the first stop portion away from the suction port, the stop block being perpendicular to the first stop portion and extending toward the suction tube assembly, and when the suction tube assembly moves toward the main body housing, the stop block abuts against the... On the rear end face of the outer tube, a limiting protrusion is provided at one end of the first stop near the suction port. The limiting protrusion is perpendicular to the first stop and extends outward. When the straw assembly moves toward the main housing, the limiting protrusion abuts against the locking ring in the locking assembly. The locking assembly locks the inner tube in different positions in the outer tube. The side wall of the outer tube is provided with a first scale and a second scale arranged side by side and extending along the axial movement direction. The first stop is adjustablely locked to the main housing with reference to the first scale and the second scale. In at least one locked position, the first scale shows the movement distance of the straw assembly relative to the main housing, and in at least another locked position, the second scale shows the movement distance of the straw assembly relative to the main housing.

[0007] A further improvement is as follows: a guide rail extending along the length direction is fixed on the outer tube, and the first stop is movably disposed in the guide rail.

[0008] A further improvement is as follows: the first stop portion includes a first latching portion extending along the length direction of the outer tube, and the main unit housing is provided with a first operating portion. The first operating portion includes a second latching portion. Pressing the first operating portion adjusts the locking position of the first latching portion and the second latching portion to adjustably lock the first stop portion to the main unit housing.

[0009] A further improvement is as follows: the first snap-fit ​​part is a first toothed row, the second snap-fit ​​part is a second toothed row that cooperates with the first toothed row, and the length of the second toothed row is less than the length of the first toothed row.

[0010] A further improvement is as follows: when the locking component is in the first locking position, the inner tube and the outer tube can move axially relative to the main housing, and one end of the first stop corresponds to the second scale to indicate the movement distance of the straw assembly relative to the main housing; When the locking component is in the second locking position, the inner tube is locked relative to the outer tube in the extended state, and the whole formed by the inner tube and the outer tube can move axially relative to the main housing. One end of the first stop corresponds to the first scale to indicate the movement distance of the straw assembly relative to the main housing. When the locking component is in the third locking position, the inner tube portion retracts into the outer tube and is locked inside the outer tube. The whole formed by the inner tube and the outer tube can move axially relative to the main housing. One end of the first stop corresponds to the first scale to indicate the movement distance of the straw assembly relative to the main housing.

[0011] A further improvement is as follows: the locking assembly includes a locking ring, a first locking part located between the locking ring and the outer tube, a second locking part and a third locking part located between the locking ring and the inner tube, wherein the second locking part or the third locking part can be engaged with the first locking part simultaneously. The first locking part includes at least one first limiting rib disposed on the rear end face of the locking ring and at least one first limiting groove disposed on the front end of the outer tube and cooperating with the first limiting rib, wherein the first limiting rib extends circumferentially along the locking ring; The second locking part includes at least one second limiting rib disposed on the inner surface of the locking ring and at least one second limiting groove disposed on the outer surface of the inner tube that cooperates with the second limiting rib, wherein the second limiting rib extends circumferentially along the locking ring; The third locking part includes the second limiting rib and at least one third limiting groove disposed on the outer surface of the inner tube and cooperating with the second limiting rib.

[0012] A further improvement is as follows: a guide groove extending axially along the straw assembly is provided on the outer surface of the inner tube. One end of the guide groove is connected to the second limiting groove, and the other end is connected to the third limiting groove. The second limiting groove is located at the front end of the inner tube, and the third limiting groove is located at the rear end of the inner tube.

[0013] A further improvement is provided as follows: the rear edge of the second limiting groove is provided with a first elastic protrusion that can float radially along the inner tube, the rear edge of the third limiting groove is provided with a second elastic protrusion that can float radially along the inner tube, and the front end of the guide groove is provided with a third elastic protrusion that can float radially along the inner tube.

[0014] A further improvement is as follows: the straw assembly further includes a second stop fixed to the side wall of the outer tube, the second stop including a third latching part extending along the length of the outer tube, the main housing being provided with a second operating part, the second operating part including a fourth latching part, pressing the second operating part to adjust the locking position of the third latching part and the fourth latching part, thereby adjusting the distance by which the outer tube extends out of the main housing.

[0015] A further improvement is as follows: the third latching part is a third toothed row, and the fourth latching part is a fourth toothed row that cooperates with the third toothed row, wherein the length of the fourth toothed row is less than the length of the third toothed row.

[0016] A further improvement is: a drilling tool assembly, the drilling tool assembly having a drilling tool and a dust collection device mounted on the drilling tool.

[0017] Compared with the prior art, the present invention has the following beneficial effects: By setting a locking component on the suction tube assembly, the inner tube is locked in the outer tube by rotating the locking ring in the locking component. This can lock the inner tube when it is at least partially retracted or fully extended from the outer tube, preventing the inner tube from moving freely relative to the outer tube when the dust collection device is adapted to a long drill bit for short-stroke drilling. This makes it easier to control the depth of short-stroke drilling with a long drill bit and is suitable for use in multiple scenarios. Meanwhile, by setting the first and second scales side by side on the sidewall of the outer tube, the first scale displays the movement distance of the suction tube assembly relative to the main housing in at least one locked position of the inner tube, and the second scale displays the movement distance of the suction tube assembly relative to the main housing in at least another locked position. This makes it easy for the dust collection device to accurately control the drilling depth when adapting to different drilling depth requirements of different length drill bits. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the dust collection device according to an embodiment of the present invention; Figure 2 This is an exploded view of the straw assembly according to an embodiment of the present invention; Figure 3 for Figure 2 Enlarged view of a portion of point A in the middle; Figure 4 for Figure 2 Enlarged view of a portion of point B in the middle; Figure 5 for Figure 2 Enlarged view of a portion of point C in the middle; Figure 6 This is another exploded view of the straw assembly according to an embodiment of the present invention; Figure 7 for Figure 2A schematic diagram of a structure in which the inner tube is not locked in the outer tube by the locking ring; Figure 8 for Figure 2 A schematic diagram of the structure in which the inner tube is locked in the outer tube by a locking ring when the inner tube is fully extended out of the outer tube; Figure 9 for Figure 2 A schematic diagram of the structure in which the inner tube is locked in the outer tube by the locking ring when the inner tube is fully retracted into the outer tube; Figure 10 A schematic diagram illustrating the dust collection device of this invention adapted to a long drill bit for long-stroke drilling; Figure 11 A schematic diagram illustrating the dust collection device of this invention adapted to a long drill bit for short-stroke drilling; Figure 12 This is a schematic diagram illustrating the dust collection device adapted for drilling with a short drill bit according to an embodiment of the present invention. Figure 13 This is a partial schematic diagram of the straw assembly housed within the main unit housing according to an embodiment of the present invention; Figure 14 This is a schematic diagram of one side of the straw assembly with the second stop portion according to an embodiment of the present invention.

[0019] Meaning of the reference numerals in the diagram: 100. Dust collection device; 110. Main unit housing; 111. First operating part; 112. Second operating part; 120. Suction tube assembly; 121. Outer tube; 1211. First scale; 1212. Second scale; 122. Inner tube; 123. Suction port; 124. First elastic protrusion; 125. Second elastic protrusion; 126. Third elastic protrusion; 130. Locking assembly; 131. Locking ring; 132. First limiting rib ; 133, First limiting groove; 134, Opening; 135, Second limiting rib; 136, Second limiting groove; 137, Third limiting groove; 138, Guide groove; 139, Fourth limiting groove; 140, Flange; 150, Fourth elastic protrusion; 160, First stop part; 161, Limiting protrusion; 162, Stop block; 163, First snap-fit ​​part; 170, Second stop part; 171, Third snap-fit ​​part; 200, Electric hammer. Detailed Implementation

[0020] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. For example, terms such as "upper," "lower," "front," and "rear" that indicate orientation or positional relationship are based solely on the orientation or positional relationship shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0022] Please see Figures 10 to 12 The diagram illustrates a preferred embodiment of a drilling tool assembly according to the present invention. The assembly includes a drilling tool and a dust collection device 100 mounted on the drilling tool. The dust collection device 100 is used to collect dust and other debris during drilling. In this embodiment, the drilling tool is an electric hammer 200. Please refer to [link to previous section]. Figure 1 As shown, the dust collection device 100 includes a main housing 110, a dust collection box (not shown) for collecting dust and other debris is provided inside the main housing 110, a filter (not shown) is provided on the dust collection box, and a suction tube assembly 120 is provided on the main housing 110. The suction tube assembly 120 includes an outer tube 121 that is movable back and forth on the main housing 110 and an inner tube 122 that is movable back and forth in the outer tube 121. A dust guiding channel is formed in the suction tube assembly 120, which communicates with the dust collection box. The front end of the inner tube 122 is provided with a suction port 123 that communicates with the dust guiding channel. Dust and other debris enter the dust guiding channel through the suction port 123 and then reach the dust collection box.

[0023] Please see Figures 1 to 5 As shown, the straw assembly 120 also includes a locking assembly 130, which locks the inner tube 122 in the outer tube 121 when the inner tube 122 is fully retracted or fully extended.

[0024] The locking assembly 130 includes a locking ring 131 movably disposed on the inner tube 122, which locks the inner tube 122 into the outer tube 121 by rotating about the axial direction of the straw assembly 120. A first locking part is provided between the locking ring 131 and the outer tube 121, and a second locking part and a third locking part are provided between the locking ring 131 and the inner tube 122. The second locking part or the third locking part can engage with the first locking part simultaneously to lock the inner tube into the outer tube.

[0025] The first locking part includes at least one first limiting rib 132 disposed on the rear end face of the locking ring 131 and at least one first limiting groove 133 disposed on the front end of the outer tube 121, which cooperates with the first limiting rib 132. The first limiting rib 132 extends circumferentially along the locking ring 131. The starting end of the first limiting groove 133 is provided with an opening 134 for the first limiting rib 132 to pass through. When the first limiting rib 132 extends into the opening 134, rotating the locking ring 131 along the extension direction of the first limiting groove 133 can cause the first limiting rib 132 to be embedded in the first limiting groove 133 and form an interlock, at which time the first locking part is engaged. Preferably, three first limiting ribs 132 are disposed at equal intervals circumferentially on the rear end face of the locking ring 131, and correspondingly, three first limiting grooves 133 are disposed at equal intervals circumferentially on the front end of the outer tube 121.

[0026] The second locking part includes at least one second limiting rib 135 disposed on the inner surface of the locking ring 131 and at least one second limiting groove 136 disposed on the outer surface of the inner tube 122 that cooperates with the second limiting rib 135. The second limiting rib 135 extends circumferentially along the locking ring 131. The third locking part includes the second limiting rib 135 and at least one third limiting groove 137 disposed on the outer surface of the inner tube 122 that cooperates with the second limiting rib 135. A guide groove 138 is disposed on the outer surface of the inner tube 122 that extends axially along the straw assembly 120. One end of the guide groove 138 is connected to the second limiting groove 136, and the other end is connected to the third limiting groove 137. Specifically, the second limiting groove 136 and the third limiting groove 137 are located on the same side of the guide groove 138. When the moving locking ring 131 causes the second limiting rib 135 to reach the second limiting groove 136 or the third limiting groove 137, the second limiting rib 135 can be embedded into the second limiting groove 136 or the third limiting groove 137 and interlocked by rotating the locking ring 131 along the extending direction of the second limiting groove 136 or the third limiting groove 137. At this time, the second locking part or the third locking part is engaged. Preferably, three second limiting ribs 135 are provided at equal intervals along the circumferential direction on the inner surface of the locking ring 131. Correspondingly, three second limiting grooves 136 and three third limiting grooves 137 are provided at equal intervals along the circumferential direction on the outer surface of the inner tube 122.

[0027] In this embodiment, to ensure that the second locking part or the third locking part engages simultaneously when the first locking part engages, the first limiting groove 133, the second limiting groove 136, and the third limiting groove 137 extend in the same direction. Furthermore, the first limiting groove 133, the second limiting groove 136, and the third limiting groove 137 are located on the same side of the guide groove 138.

[0028] In this embodiment, the second limiting groove 136 is disposed at the front end of the inner tube 122, that is, the second limiting groove 136 is disposed adjacent to the suction port 123; the third limiting groove 137 is disposed at the rear end of the inner tube 122, that is, the third limiting groove 137 is disposed adjacent to the outer tube 121. Therefore, when the second limiting rib 135 is embedded in the second limiting groove 136, the inner tube 122 is locked in the outer tube 121 in the fully retracted state; when the second limiting rib 135 is embedded in the third limiting groove 137, the inner tube 122 is locked in the outer tube 121 in the fully extended state.

[0029] The rear edge of the second limiting groove 136 is provided with a first elastic protrusion 124 that can float radially along the inner tube 122, and the rear edge of the third limiting groove 137 is provided with a second elastic protrusion 125 that can float radially along the inner tube 122.

[0030] When the second locking part needs to be engaged, the locking ring 131 is rotated along the extension direction of the second limiting groove 136. The first limiting rib 132 presses down the first elastic protrusion 124 and passes over the first elastic protrusion 124. At this time, the second limiting rib 135 is embedded in the second limiting groove 136. The cooperation between the first elastic protrusion 124 and the first limiting rib 132 can prevent the locking ring 131 from rotating under non-human action, thereby preventing the second locking part from unlocking during drilling, for example, by the electric hammer 200.

[0031] When the third locking part needs to be engaged, the locking ring 131 is rotated along the extension direction of the third limiting groove 137. The first limiting rib 132 presses down the second elastic protrusion 125 and passes over the second elastic protrusion 125. At this time, the second limiting rib 135 is embedded in the third limiting groove 137. The cooperation between the second elastic protrusion 125 and the first limiting rib 132 can prevent the locking ring 131 from rotating under non-human action, thereby preventing the third locking part from unlocking during drilling, for example, by the electric hammer 200.

[0032] The front end of the guide groove 138 is provided with a third elastic protrusion 126 that can float radially along the inner tube 122. When it is not necessary to lock the inner tube 122 onto the outer tube 121, the locking ring 131 is limited to the position adjacent to the suction port 123. When it is necessary to move the locking ring 131 axially along the inner tube 122, the second limiting rib 135 needs to move past the third elastic protrusion 126 in the guide groove 138. The cooperation between the second limiting rib 135 and the third elastic protrusion 126 can prevent the locking ring 131 from moving from the position adjacent to the suction port 123 toward the outer tube 121 without human intervention.

[0033] Please see Figure 6 As shown, in other embodiments, at least one additional limiting groove can be added to the outer surface of the inner tube 122 as needed, and cooperate with the second limiting rib 135 to form at least one additional locking part. Taking the addition of an additional limiting groove as an example, the limiting groove is a fourth limiting groove 139, which can be set at any position between the second limiting groove 136 and the third limiting groove 137. Correspondingly, a fourth elastic protrusion 150 is provided on the rear edge of the fourth limiting groove 139. In this way, the dust collection device 100 can be adapted to drill bits of various sizes.

[0034] Please continue reading. Figures 1 to 6 As shown, at least one flange 140 is provided on the outer surface of the locking ring 131, and the flange 140 extends radially outward along the locking ring 131. Preferably, two flanges 140 are provided on the outer surface of the locking ring 131, and the two flanges 140 are arranged in a mirror symmetrical manner about the central axis of the straw assembly 120. By providing the flanges 140, the locking ring 131 can be easily rotated.

[0035] Please see Figure 7As shown, when it is not necessary to lock the inner tube 122 onto the outer tube 121, the locking ring 131 is placed near the suction port 123.

[0036] Please see Figure 8 As shown, when it is necessary to lock the inner tube 122 in the outer tube 121 with the inner tube fully extended, move the locking ring 131 to a position adjacent to the outer tube 121, rotate the locking ring 131 along the direction of the extension of the first limiting groove 133, the first limiting rib 132 is embedded in the first limiting groove 133, and the second limiting rib 135 is embedded in the third limiting groove 137. At this time, the first locking part and the third locking part are engaged, and the inner tube 122 is locked in the outer tube 121.

[0037] Please see Figure 9 As shown, when it is necessary to lock the inner tube 122 in the outer tube 121 in a fully retracted state, move the locking ring 131 to the position adjacent to the suction port 123, rotate the locking ring 131 along the direction of the extension of the first limiting groove 133, the first limiting rib 132 is embedded in the first limiting groove 133, and the second limiting rib 135 is embedded in the second limiting groove 136. At this time, the first locking part and the second locking part are engaged, and the inner tube 122 is locked in the outer tube 121.

[0038] Please see Figure 13 As shown, the dust collection device 100 has a first operating part 111 on its main housing 110, and a guide rail (not shown) extending along its length and a first stop part 160 movably disposed in the guide rail are fixed on the side wall of the outer tube 121. In this embodiment, the guide rail and the outer tube 121 are integrally formed. The first stop part 160 is used to limit the distance that the suction tube assembly 120 moves toward the main housing 110. The first operating part 111 has a first position and a second position relative to the main housing 110. The first operating part 110 can be a first button assembly, wherein the first position indicates the position of the first button assembly on the main housing 110 when it is not pressed, and the second position indicates the position of the first button assembly on the main housing 110 when it is pressed. The first operating part 111 includes a second latching part (not shown), and the first stop part 160 includes a first latching part 163. When the first operating part 111 is in the first position, the second latching part engages with the first latching part 163, thereby preventing the first stop part 160 from moving relative to the outer tube 121; when the first operating part 111 is in the second position, the second latching part disengages from the first latching part 163, thereby allowing the first stop part 160 to move relative to the outer tube 121. Specifically, the first latching part 163 is a first toothed row, and the second latching part is a second toothed row that engages with the first toothed row, the length of the second toothed row being shorter than the length of the first toothed row.

[0039] The outer tube 121 has a first scale 1211 and a second scale 1212 arranged side by side and extending along the axial movement direction on its sidewall. The first scale 1211 and the second scale 1212 are located on the upper and lower sides of the first stop portion 160, respectively. The first stop portion 160 is adjustablely locked to the main housing 110 by the first operating part 111 with reference to the first scale 1211 and the second scale 1212. In this embodiment, please refer to Figure 13 As shown, the units of the first scale 1211 and the second scale 1212 can be millimeters. The value of the first scale 1211 is "20~80" and the value of the second scale 1212 is "80~130".

[0040] The first stop portion 160 has a limiting protrusion 161 at one end facing the suction port 123 and a stop block 162 at the other end away from the suction port 123. The limiting protrusion 161 is perpendicular to the first stop portion 160 and extends in a direction away from the straw assembly 120. The limiting protrusion 161 is used to indicate the value of the first scale 1211 or the second scale 1212. That is, when the first stop portion 160 is moved, the reading on the first scale 1211 or the second scale 1212 pointed to by the limiting protrusion 161 indicates the distance that the straw assembly 120 can move toward the main housing 110. At the same time, the limiting protrusion 161 can also be used as a handle to move the first stop portion 160. The operator can move the first stop portion 160 by turning the limiting protrusion 161.

[0041] The stop block 162 extends perpendicularly to the first stop portion 160 and toward the straw assembly 120. On one hand, when the first stop portion 160 is pulled toward the suction port 123, the stop block 162 abuts against the rear end face of the outer tube 121 to prevent the first stop portion 160 from being completely pulled out of the main housing 110; on the other hand, when the straw assembly 120 moves toward the main housing 110, the stop block 162 abuts against the rear end face of the outer tube 121 to prevent the straw assembly 120 from continuing to move. In other embodiments, when the straw assembly 120 moves toward the main housing 110, the abutment between the limiting protrusion 161 and the locking ring 131 can also prevent the straw assembly 120 from continuing to move.

[0042] See Figures 10 to 12 As shown, when the locking component 130 is in different locking positions, the movement distance of the suction tube component 120 relative to the main housing 110 is displayed by different scales. That is, when the dust collection device 100 is adapted to different sizes of drill bits with different drilling depth requirements, the drilling depth can be precisely controlled. The following explanation uses long drill bits and short drill bits as examples.

[0043] Please see Figure 10As shown, the dust collection device 100 is mounted on the electric hammer 200. A long drill bit is mounted on the front end of the electric hammer 200, and the long drill bit passes through the suction port 123 from back to front. When it is necessary to use the long drill bit for long-stroke drilling, the locking component 130 is in the first locking position, and the locking ring 131 is held at the front end of the inner tube 122 by the third elastic protrusion 126. The inner tube 122 is not locked in the outer tube 121, and the inner tube 122 and the outer tube 121 can move axially relative to the main housing 110 respectively. The drilling stroke of the long drill bit corresponds to the sum of the stroke of the inner tube 122 when it is fully retracted into the outer tube 121 and the stroke of the outer tube 121 when it is fully retracted into the main housing 110, that is, the drilling stroke corresponds to the second scale 1212 indicated by the limiting protrusion 161.

[0044] Please see Figure 11 As shown, the dust collection device 100 is mounted on the electric hammer 200. A long drill bit is mounted on the front end of the electric hammer 200, and the long drill bit passes through the suction port 123 from back to front. When it is necessary to use the long drill bit for short-stroke drilling, the locking component 130 is in the second locking position, the first locking part and the third locking part are engaged at the same time, the locking ring 131 is axially stopped by the first locking part and circumferentially stopped by the third locking part, the inner tube 122 is locked in the outer tube 121 in a fully extended state, and the whole formed by the inner tube 122 and the outer tube 121 can move axially relative to the main housing 110. The drilling stroke of the long drill bit corresponds to the stroke of the outer tube 121 being fully retracted into the main housing 110, that is, the drilling stroke corresponds to the first scale 1211 indicated by the limiting protrusion 161.

[0045] Please see Figure 12 As shown, the dust collection device 100 is mounted on the electric hammer 200. A short drill bit is mounted on the front end of the electric hammer 200, and the short drill bit passes through the suction port 123 from back to front. When drilling is required using the short drill bit, the locking component 130 is in the third locking position. The first locking part and the second locking part are engaged simultaneously. The locking ring 131 is axially stopped by the first locking part and circumferentially stopped by the second locking part. The inner tube 122 is locked in the outer tube 121 in a fully retracted state. The whole formed by the inner tube 122 and the outer tube 121 can move axially relative to the main housing 110. The drilling stroke of the short drill bit corresponds to the stroke of the outer tube 121 fully retracted into the main housing 110, that is, the drilling stroke corresponds to the first scale 1211 indicated by the limiting protrusion 161.

[0046] Please see Figure 14As shown, the dust collection device 100 has a second operating part 112 on its main housing 110, and a second stop part 170 fixed on the side wall of the outer tube 121. The second stop part 170 cooperates with the second operating part 112 to limit the distance the suction tube assembly 120 moves away from the main housing 110. The second operating part 112 has a first position and a second position relative to the main housing 110. The second operating part 112 can be a second button assembly, wherein the first position indicates the position of the second button assembly on the main housing 110 when it is not pressed, and the second position indicates the position of the second button assembly on the main housing 110 when it is pressed. The second operating part 112 includes a fourth latching part (not shown), and the second stop part 170 includes a third latching part 171. When the second operating part 112 is in the first position, the fourth latching part engages with the third latching part 171, thereby preventing the outer tube 121 from moving relative to the main housing 110. When the second operating part 112 is in the second position, the fourth latching part disengages from the third latching part 171, thereby allowing the outer tube 121 to move relative to the main housing 110. Specifically, the third latching part 171 is a third toothed row, and the fourth latching part is a fourth toothed row that engages with the third toothed row. The length of the fourth toothed row is shorter than the length of the third toothed row. By pressing the second operating part 112, the distance by which the outer tube 121 extends out of the main housing 110 can be adjusted to accommodate drill bits of different lengths.

[0047] In summary, by providing a locking component 130 on the suction tube assembly 120, the inner tube 122 is locked in the outer tube 121 by rotating the locking ring 131 in the locking component 130. This can at least ensure that the inner tube 122 is locked when it is partially retracted or fully extended from the outer tube 121, preventing the inner tube 122 from moving freely relative to the outer tube 121 when the dust collection device 100 is adapted to a long drill bit for short-stroke drilling. This facilitates control of the drilling depth of the long drill bit in short strokes and is suitable for use in multiple scenarios. Meanwhile, by arranging a first scale 1211 and a second scale 1212 side by side on the side wall of the outer tube 121, the inner tube 122 displays the movement distance of the suction tube assembly 120 relative to the main housing 110 by the first scale 1211 in at least one locked position, and displays the movement distance of the suction tube assembly 120 relative to the main housing 110 by the second scale 1212 in at least another locked position. This makes it easy for the dust collection device 100 to accurately control the drilling depth when adapting to different drilling depth requirements of different length drill bits.

[0048] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of protection of the claims.

Claims

1. A dust collection device for mounting on a drilling tool, the dust collection device comprising a main housing, a dust collection box mounted on the main housing, and a suction tube assembly, the suction tube assembly comprising an outer tube axially movably disposed on the main housing, an inner tube axially movably disposed within the outer tube, a locking component, and a first stop restricting the rearward movement of the outer tube, the inner tube having a suction port at its front end, and a dust guiding channel forming in the suction tube assembly communicating with the suction port to the dust collection box; characterized in that: The first stop portion has a stop block at the other end away from the suction port. The stop block is perpendicular to the first stop portion and extends toward the straw assembly. When the straw assembly moves toward the main housing, the stop block abuts against the rear end face of the outer tube. The first stop portion has a limiting protrusion at the end near the suction port. The limiting protrusion is perpendicular to the first stop portion and extends outward. When the straw assembly moves toward the main housing, the limiting protrusion abuts against the locking ring in the locking assembly. The locking assembly locks the inner tube in different positions in the outer tube. The side wall of the outer tube has a first scale and a second scale arranged side by side and extending along the axial movement direction. The first stop portion is adjustablely locked to the main housing with reference to the first scale and the second scale. The inner tube displays the movement distance of the straw assembly relative to the main housing by the first scale in at least one locked position, and displays the movement distance of the straw assembly relative to the main housing by the second scale in at least another locked position.

2. The dust collection device according to claim 1, characterized in that: The outer tube is fixedly provided with a guide rail extending along its length, and the first stop is movably disposed in the guide rail.

3. The dust collection device according to claim 2, characterized in that: The first stop portion includes a first latching portion extending along the length direction of the outer tube. The main unit housing is provided with a first operating portion. The first operating portion includes a second latching portion. Pressing the first operating portion adjusts the locking position of the first latching portion and the second latching portion to adjustably lock the first stop portion to the main unit housing.

4. The dust collection device according to claim 3, characterized in that: The first latching part is a first toothed row, and the second latching part is a second toothed row that cooperates with the first toothed row. The length of the second toothed row is less than the length of the first toothed row.

5. The dust collection device according to claim 1, characterized in that: When the locking component is in the first locking position, the inner tube and the outer tube can move axially relative to the main housing, and one end of the first stop corresponds to the second scale to indicate the movement distance of the straw assembly relative to the main housing. When the locking component is in the second locking position, the inner tube is locked relative to the outer tube in the extended state, and the whole formed by the inner tube and the outer tube can move axially relative to the main housing. One end of the first stop corresponds to the first scale to indicate the movement distance of the straw assembly relative to the main housing. When the locking component is in the third locking position, the inner tube portion retracts into the outer tube and is locked inside the outer tube. The whole formed by the inner tube and the outer tube can move axially relative to the main housing. One end of the first stop corresponds to the first scale to indicate the movement distance of the straw assembly relative to the main housing.

6. The dust collection device according to claim 5, characterized in that: The locking assembly includes a locking ring, a first locking part located between the locking ring and the outer tube, a second locking part and a third locking part located between the locking ring and the inner tube, wherein the second locking part or the third locking part can be engaged with the first locking part simultaneously. The first locking part includes at least one first limiting rib disposed on the rear end face of the locking ring and at least one first limiting groove disposed on the front end of the outer tube and cooperating with the first limiting rib, wherein the first limiting rib extends circumferentially along the locking ring; The second locking part includes at least one second limiting rib disposed on the inner surface of the locking ring and at least one second limiting groove disposed on the outer surface of the inner tube that cooperates with the second limiting rib, wherein the second limiting rib extends circumferentially along the locking ring; The third locking part includes the second limiting rib and at least one third limiting groove disposed on the outer surface of the inner tube and cooperating with the second limiting rib.

7. The dust collection device according to claim 6, characterized in that: A guide groove is provided on the outer surface of the inner tube, extending axially along the straw assembly. One end of the guide groove is connected to the second limiting groove, and the other end is connected to the third limiting groove. The second limiting groove is located at the front end of the inner tube, and the third limiting groove is located at the rear end of the inner tube.

8. The dust collection device according to claim 7, characterized in that: The rear edge of the second limiting groove is provided with a first elastic protrusion that can float radially along the inner tube, the rear edge of the third limiting groove is provided with a second elastic protrusion that can float radially along the inner tube, and the front end of the guide groove is provided with a third elastic protrusion that can float radially along the inner tube.

9. The dust collection device according to claim 1, characterized in that: The straw assembly further includes a second stop fixed to the side wall of the outer tube. The second stop includes a third latching part extending along the length of the outer tube. The main housing is provided with a second operating part, which includes a fourth latching part. Pressing the second operating part adjusts the locking position of the third latching part and the fourth latching part to adjust the distance by which the outer tube extends out of the main housing.

10. The dust collection device according to claim 9, characterized in that: The third latching part is a third toothed row, and the fourth latching part is a fourth toothed row that cooperates with the third toothed row. The length of the fourth toothed row is less than the length of the third toothed row.

11. A drilling tool assembly, characterized in that: The drilling tool assembly includes a drilling tool and a dust collection device as described in any one of claims 1-10, mounted on the drilling tool.

Images