Dust collection device and electric tool

Abstract

The utility model discloses a dust collecting device and an electric tool. The dust collecting device comprises a main machine shell; the dust collection box is arranged in the main machine shell, and a filter is arranged on the dust collection box; the suction pipe assembly is arranged on the main machine shell, and a dust guide channel communicated to the dust collection box is formed in the suction pipe assembly; the suction pipe assembly comprises an outer pipe and an inner pipe, the outer pipe is arranged on the main machine shell in a front-back moving mode, the inner pipe is arranged in the outer pipe in a front-back moving mode, and a suction opening communicated with the dust guide channel is formed in the front end of the inner pipe; the suction tube assembly further comprises a locking assembly, and the locking assembly locks the inner tube in the outer tube at least when the inner tube completely retracts or completely stretches out of the outer tube. The dust collecting device provided by the utility model can be suitable for various scenes.

Description

[Technical field]

[0001] The present invention relates to the technical field of electric tools, and in particular to a dust collecting device used together with an electric tool and the electric tool. [Background Technology]

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

[0003] Existing dust collection devices, such as Japanese Patent Publication No. JP6778560B2, disclose a dust collection device for power tools. This device uses an operating ring located at the front end of the outer cylinder to lock the inner cylinder when it is retracted into the outer cylinder, allowing it to accommodate two drill bit sizes. This dust collection device only secures the inner cylinder when it is retracted. When using a long drill bit for short-stroke drilling, the inner cylinder can freely move relative to the outer cylinder, making it difficult to control the drilling depth.

[0004] In view of this, it is indeed necessary to provide an improved dust collecting device and an electric tool equipped with the dust collecting device to overcome the defects of the prior art. [Summary of the invention]

[0005] In view of the deficiencies in the prior art, an object of the present invention is to provide a dust collecting device that can be used in multiple scenarios and an electric tool equipped with the dust collecting device.

[0006] The technical solution adopted by the present invention to solve the problems of the prior art is: a dust collecting device, comprising: a main body shell; a dust box, which is arranged in the main body shell, and a filter is provided on the dust box; a suction pipe assembly, which is arranged on the main body shell, and a dust guide channel connected to the dust box is formed in the suction pipe assembly; the suction pipe assembly includes an outer tube which is movably arranged on the main body shell and is movably arranged in the outer tube, and a suction port which is connected to the dust guide channel is provided at the front end of the inner tube; the suction pipe assembly also includes a locking assembly, which locks the inner tube in the outer tube at least when the inner tube is fully retracted or fully extended from the outer tube.

[0007] A further improved solution is that the locking assembly includes a locking ring that is movably arranged on the inner tube, and the locking ring locks the inner tube in the outer tube by rotating axially around the straw assembly.

[0008] A further improvement is that a first locking portion is provided between the locking ring and the outer tube, and at least a second locking portion and a third locking portion are provided between the locking ring and the inner tube, and the second locking portion or the third locking portion is engaged with the first locking portion simultaneously.

[0009] A further improved solution is: the first locking part includes at least one first limiting rib arranged on the rear end face of the locking ring and at least one first limiting groove arranged at the front end of the outer tube and cooperating with the first limiting rib, and the first limiting rib extends circumferentially along the locking ring.

[0010] A further improved solution is: the second locking part includes at least one second limiting rib arranged on the inner surface of the locking ring and at least one second limiting groove arranged on the outer surface of the inner tube and cooperating with the second limiting rib, and 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 arranged on the outer surface of the inner tube and cooperating with the second limiting rib; a guide groove extending axially along the straw assembly is provided on the outer surface of the inner tube, and one end of the guide groove is connected to the second limiting groove, and the other end is connected to the third limiting groove.

[0011] A further improved solution is: the second limiting groove is arranged at the front end of the inner tube, and the third limiting groove is arranged at the rear end of the inner tube.

[0012] A further improvement is that the rear edge of the second limiting groove is provided with a first elastic protrusion that can float along the radial direction of the inner tube, and the rear edge of the third limiting groove is provided with a second elastic protrusion that can float along the radial direction of the inner tube.

[0013] A further improved solution is: a third elastic protrusion that can float along the radial direction of the inner tube is provided at the front end of the guide groove.

[0014] A further improved solution is that at least one flange is provided on the outer surface of the locking ring, and the flange extends radially outward along the locking ring.

[0015] The present invention also provides an electric tool, on which the above-mentioned dust collecting device is installed.

[0016] Compared with the prior art, the present invention has the following beneficial effects: the present invention provides a locking assembly on the straw assembly, and locks the inner tube in the outer tube by rotating the locking ring in the locking assembly, so that the inner tube can at least be locked when it is fully retracted or fully extended from the outer tube, thereby 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, making it easy to control the depth of short-stroke drilling with a long drill bit, and being suitable for use in multiple scenarios. [Brief Description of the Drawings]

[0017] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings:

[0018] Figure 1 1 is a schematic structural diagram of a dust collecting device according to an embodiment of the present invention;

[0019] Figure 2 is an exploded view of the structure of a straw assembly according to an embodiment of the present invention;

[0020] Figure 3 yes Figure 2 A partial enlarged schematic diagram in the middle;

[0021] Figure 4 yes Figure 2 A partial enlarged schematic diagram of point B in the middle;

[0022] Figure 5 yes Figure 2 A partial enlarged schematic diagram of point C in the middle;

[0023] Figure 6 is another structural exploded view of the straw assembly according to an embodiment of the present invention;

[0024] Figure 7 yes Figure 2 Schematic diagram of the structure in which the inner tube is not locked in the outer tube by the locking ring;

[0025] Figure 8 yes Figure 2 Schematic diagram of the structure in which the inner tube is completely extended out of the outer tube and locked in the outer tube by the locking ring;

[0026] Figure 9 yes Figure 2 Schematic diagram of the structure in which the inner tube is completely retracted into the outer tube and locked in the outer tube by the locking ring;

[0027] Figure 10 Schematic diagram of a dust collecting device according to an embodiment of the present invention adapted to a long drill bit for long-stroke drilling;

[0028] Figure 11 Schematic diagram of a dust collection device according to an embodiment of the present invention adapted to a long drill bit for short-stroke drilling;

[0029] Figure 12 It is a schematic diagram of the dust collecting device according to an embodiment of the present invention being adapted to be used for drilling with a short drill bit.

[0030] The meaning of the reference numerals in the figures:

[0031] 100. Dust collecting device; 110. Main body housing; 120. Suction tube assembly; 121. Outer tube; 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; 200. Electric hammer. [Specific implementation method]

[0032] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. For example, terms such as "front" and "rear" used below to indicate orientation or positional relationships are based solely on the orientation or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the disclosure. They do not indicate or imply that the device or component referred to must have a specific orientation or be constructed or operated in a specific orientation, and therefore should not be construed as limiting the disclosure.

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0034] See also Figure 1 As shown, the present invention provides a dust collection device 100 for collecting dust and other debris during drilling using an electric hammer 200. In this embodiment, the dust collection device 100 includes a main body housing 110, a dust box (not shown) for storing dust and other debris is provided in the main body housing 110, a filter (not shown) is provided on the dust box, and a suction pipe assembly 120 is provided on the main body housing 110. The suction pipe assembly 120 includes an outer tube 121 movably provided on the main body housing 110 and an inner tube 122 movably provided in the outer tube 121. A dust guide channel connected to the dust guide channel is formed in the suction pipe assembly 120, and a suction port 123 connected to the dust guide channel is provided at the front end of the inner tube 122. Dust and other debris enter the dust guide channel through the suction port 123 and reach the dust box.

[0035] See also Figures 1 to 5 As shown, the straw assembly 120 further 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 from the outer tube 121 .

[0036] The locking assembly 130 includes a locking ring 131 disposed on the inner tube 122 so as to be movable forward and backward. The locking ring 131 locks the inner tube 122 in the outer tube 121 by allowing the inner tube 122 to rotate axially about the straw assembly 120. A first locking portion is disposed between the locking ring 131 and the outer tube 121, and a second locking portion and a third locking portion are disposed between the locking ring 131 and the inner tube 122. When the first locking portion is engaged, the second locking portion or the third locking portion is simultaneously engaged.

[0037] The first locking portion includes at least one first limiting rib 132 disposed on the rear end of the locking ring 131 and at least one first limiting groove 133 disposed at 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. An opening 134 is provided at the starting end of the first limiting groove 133 for the first limiting rib 132 to pass through. Once the first limiting rib 132 extends into the opening 134, rotating the locking ring 131 in the direction of the first limiting groove 133 causes the first limiting rib 132 to engage with the first limiting groove 133, forming an interlocking engagement. At this point, the first locking portion engages. Preferably, three first limiting ribs 132 are circumferentially and evenly spaced on the rear end of the locking ring 131, and correspondingly, three first limiting grooves 133 are circumferentially and evenly spaced on the front end of the outer tube 121.

[0038] The second locking portion includes at least one second limiting rib 135 arranged on the inner surface of the locking ring 131 and at least one second limiting groove 136 arranged on the outer surface of the inner tube 122 and cooperating with the second limiting rib 135, and the second limiting rib 135 extends circumferentially along the locking ring 131; the third locking portion includes a second limiting rib 135 and at least one third limiting groove 137 arranged on the outer surface of the inner tube 122 and cooperating with the second limiting rib 135; a guide groove 138 extending axially along the straw assembly 120 is provided on the outer surface of the inner tube 122, and 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 arranged on the same side of the guide groove 138. When the locking ring 131 is moved so that the second limiting rib 135 reaches the second limiting groove 136 or the third limiting groove 137, the locking ring 131 is rotated along the extension direction of the second limiting groove 136 or the third limiting groove 137, so that the second limiting rib 135 is embedded in the second limiting groove 136 or the third limiting groove 137, forming an interlocking state. At this time, the second locking portion or the third locking portion engages. Preferably, three second limiting ribs 135 are circumferentially and evenly spaced on the inner surface of the locking ring 131. Correspondingly, three second limiting grooves 136 and three third limiting grooves 137 are circumferentially and evenly spaced on the outer surface of the inner tube 122.

[0039] In this embodiment, to ensure that the second or third locking portion engages simultaneously with the first locking portion, 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.

[0040] In this embodiment, the second limiting groove 136 is provided at the front end of the inner tube 122, i.e., the second limiting groove 136 is provided adjacent to the suction port 123; the third limiting groove 137 is provided at the rear end of the inner tube 122, i.e., the third limiting groove 137 is provided adjacent to the outer tube 121. Therefore, when the second limiting rib 135 engages with the second limiting groove 136, the inner tube 122 is locked in the outer tube 121 in a fully retracted state; and when the second limiting rib 135 engages with the third limiting groove 137, the inner tube 122 is locked in the outer tube 121 in a fully extended state.

[0041] A first elastic protrusion 124 that can float radially along the inner tube 122 is provided on the rear edge of the second limiting groove 136 , and a second elastic protrusion 125 that can float radially along the inner tube 122 is provided on the rear edge of the third limiting groove 137 .

[0042] 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, and 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 first elastic protrusion 124 cooperates with the first limiting rib 132 to prevent the locking ring 131 from rotating under non-human action, thereby preventing the second locking part from being unlocked during the drilling process of, for example, an electric hammer 200.

[0043] 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, and 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 second elastic protrusion 125 cooperates with the first limiting rib 132 to prevent the locking ring 131 from rotating under non-human action, thereby preventing the third locking part from being unlocked during the drilling process of, for example, an electric hammer 200.

[0044] 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 the inner tube 122 does not need to be locked to the outer tube 121, the locking ring 131 is confined to a position adjacent to the suction port 123. When the locking ring 131 needs to be moved axially along the inner tube 122, the second limiting rib 135 needs to move in the guide groove 138 over the third elastic protrusion 126. The cooperation between the second limiting rib 135 and the third elastic protrusion 126 prevents the locking ring 131 from moving from the position adjacent to the suction port 123 toward the outer tube 121 due to unintentional factors.

[0045] See also Figure 6As shown, in other embodiments, at least one additional retaining groove can be added to the outer surface of the inner tube 122 as needed, cooperating with the second retaining rib 135 to form at least one additional locking portion. For example, the addition of an additional retaining groove, a fourth retaining groove 139, can be provided at any position between the second retaining groove 136 and the third retaining groove 137. Correspondingly, a fourth elastic protrusion 150 is provided on the rear edge of the fourth retaining groove 139. In this manner, the dust collection device 100 is adaptable to drill bits of various sizes.

[0046] Please continue reading Figures 1 to 6 As shown, the outer surface of the locking ring 131 is provided with at least one flange 140, which extends radially outward from the locking ring 131. Preferably, the outer surface of the locking ring 131 is provided with two flanges 140, which are arranged in mirror-image symmetry about the central axis of the straw assembly 120. The provision of flanges 140 facilitates the rotation of the locking ring 131.

[0047] See also Figure 7 As shown, when it is not necessary to lock the inner tube 122 to the outer tube 121 , the locking ring 131 is placed adjacent to the suction port 123 .

[0048] See also Figure 8 As shown, when the inner tube 122 needs to be locked in the outer tube 121 in a fully extended state, the locking ring 131 is moved to a position adjacent to the outer tube 121, and the locking ring 131 is rotated along the direction in which the first limiting groove 133 extends. 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 portion and the third locking portion are engaged, and the inner tube 122 is locked in the outer tube 121.

[0049] See also Figure 9 As shown, when the inner tube 122 needs to be locked in the outer tube 121 in a fully retracted state, the locking ring 131 is moved to a position adjacent to the suction port 123, and the locking ring 131 is rotated along the direction in which the first limiting groove 133 extends. 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 portion and the second locking portion are engaged, and the inner tube 122 is locked in the outer tube 121.

[0050] By locking the inner tube 122 in the outer tube 121 in a fully extended or fully retracted state, drill bits of different sizes can be adapted.

[0051] See also Figure 10As shown, the dust collector 100 is mounted on an 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 the back to the front. When the long drill bit is required for long-stroke drilling, the inner tube 122 is not locked in the outer tube 121. At this time, the drilling stroke of the long drill bit corresponds to the sum of the stroke of the inner tube 122 fully retracted into the outer tube 121 and the stroke of the outer tube 121 fully retracted into the main body housing 110.

[0052] See also Figure 11 As shown, the dust collector 100 is mounted on an 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 the back to the front. When the long drill bit is needed for short-stroke drilling, the inner tube 122 is locked in the outer tube 121 in a fully extended state. At this time, the drilling stroke of the long drill bit corresponds to the stroke when the outer tube 121 is fully retracted into the main body housing 110.

[0053] See also Figure 12 As shown, the dust collector 100 is mounted on an electric hammer 200. A short drill bit is mounted on the front end of the electric hammer 200. The short drill bit passes through the suction port 123 from the back to the front. When the short drill bit is needed for drilling, the inner tube 122 is locked in the outer tube 121 in a fully retracted state. At this time, the drilling stroke of the short drill bit corresponds to the stroke of the outer tube 121 fully retracted into the main body housing 110.

[0054] Through the above-mentioned configuration, the dust collecting device of the present invention can be applied to a variety of scenarios.

[0055] The present invention is not limited to the above-described specific embodiments. A person skilled in the art will readily appreciate that many alternatives to the dust collecting device 100 of the present invention exist without departing from the principles and scope of the present invention. The scope of protection of the present invention shall be determined by the contents of the claims.

Claims

1. A dust collecting device comprising: Host housing; A dust box is provided in the main body housing, and a filter is provided on the dust box; A suction pipe assembly is provided on the main body housing, wherein a dust guide channel connected to the dust collection box is formed in the suction pipe assembly; The suction pipe assembly includes an outer tube movably arranged on the main body shell and an inner tube movably arranged in the outer tube, wherein the front end of the inner tube is provided with a suction port connected to the dust guide channel; Its characteristics are: The straw assembly further comprises a locking assembly, which locks the inner tube in the outer tube at least when the inner tube is fully retracted or fully extended from the outer tube.

2. The dust collecting device according to claim 1, characterized in that: The locking assembly comprises a locking ring which is movably arranged on the inner tube. The locking ring locks the inner tube in the outer tube in a manner of rotating axially around the straw assembly.

3. The dust collecting device according to claim 2, characterized in that: A first locking portion is provided between the locking ring and the outer tube, and at least a second locking portion and a third locking portion are provided between the locking ring and the inner tube. The second locking portion or the third locking portion is engaged with the first locking portion simultaneously.

4. The dust collecting device according to claim 3, characterized in that: The first locking portion includes at least one first limiting rib arranged on the rear end surface of the locking ring and at least one first limiting groove arranged on the front end of the outer tube and matched with the first limiting rib, and the first limiting rib extends along the circumference of the locking ring.

5. The dust collecting device according to claim 3, characterized in that: The second locking portion includes at least one second limiting rib provided on the inner surface of the locking ring and at least one second limiting groove provided on the outer surface of the inner tube and cooperating with the second limiting rib, wherein the second limiting rib extends along the circumference of the locking ring; The third locking portion includes the second limiting rib and at least one third limiting groove provided on the outer surface of the inner tube and cooperating with the second limiting rib; 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.

6. The dust collecting device according to claim 5, characterized in that: The second limiting groove is arranged at the front end of the inner tube, and the third limiting groove is arranged at the rear end of the inner tube.

7. The dust collecting device according to claim 6, characterized in that: A first elastic protrusion that can float along the radial direction of the inner tube is provided on the rear edge of the second limiting groove, and a second elastic protrusion that can float along the radial direction of the inner tube is provided on the rear edge of the third limiting groove.

8. The dust collecting device according to claim 5, characterized in that: The front end of the guide groove is provided with a third elastic protrusion which can float along the radial direction of the inner tube.

9. The dust collecting device according to claim 2, characterized in that: At least one flange is provided on an outer surface of the locking ring, and the flange extends radially outward along the locking ring.

10. An electric tool, characterized in that: The electric tool is equipped with a dust collecting device according to any one of claims 1 to 9.

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