Dust remover

Abstract

A dust remover comprises: a nozzle; a dust remover shell; a dust tube coupled to the nozzle and slidable relative to the dust collector housing between an extended position and a retracted position; and a dust collection container selectively coupled to the dust collector housing. The conveying pipe is configured to guide air from the dust collecting pipe to the dust collecting container, the dust collecting pipe comprises an open hole part and a cover, the open hole part is aligned with the conveying pipe, and the cover is slidably connected to the dust collecting pipe to selectively close the open hole part.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to U.S. Provisional Patent Application No. 63 / 272,496, filed on October 27, 2021, entitled “Dust Tube Assembly for A Dust Extractor,” the contents of which are incorporated herein by reference in their entirety. Technical Field

[0003] The utility model relates to a power tool, and more particularly to a dust collecting component used with the power tool. Background Art

[0004] Dust collection assemblies are often used with hand-held drilling tools such as rotary hammers to collect dust and other debris during the drilling operation, thereby preventing dust and other debris from accumulating at the work site. Such dust collection assemblies can be attached to the rotary hammer so that the suction inlet of the dust collector is located close to the drill bit attached to the rotary hammer. Such dust collection assemblies can also include a built-in dust collection container in which dust and other debris accumulate. Such dust collection containers are often removable from the dust collection assembly to facilitate removal of accumulated dust and debris. Utility Model Content

[0005] In one aspect, the present disclosure provides a dust collector, the dust collector comprising: a nozzle; a dust collector housing; a dust collecting pipe coupled to the nozzle and slidable between an extended position and a retracted position relative to the dust collector housing; and a dust collecting container selectively coupled to the dust collector housing. The delivery pipe is configured to guide air from the dust collecting pipe to the dust collecting container, wherein the dust collecting pipe comprises an aperture portion and a cover, the aperture portion is aligned with the delivery pipe, and the cover is slidably coupled to the dust collecting pipe to selectively close the aperture portion.

[0006] In another aspect, the present disclosure provides a dust collector comprising: a dust collector housing; a dust collection container comprising an inlet for receiving dust-laden air; a delivery pipe positioned within the dust collector housing and arranged to guide the dust-laden air into the dust collection container; and a dust collection pipe slidable relative to the delivery pipe and configured to draw the dust-laden air into the dust collector. The dust collection pipe comprises an aperture portion aligned with the delivery pipe to allow the dust collection pipe to slide from an extended position to a retracted position without interference from the delivery pipe.

[0007] In another aspect, the present disclosure provides a dust collector, the dust collector comprising: a dust collector housing; a dust collection container selectively coupled to the dust collector housing; a dust collection pipe slidable between an extended position and a retracted position relative to the dust collector housing; a suction fan configured to generate a vacuum airflow within the dust collector; and a suction motor drivingly engaged with the suction fan. The delivery pipe is configured to guide air from the dust collection pipe to the dust collection container, wherein the delivery pipe is positioned in front of the suction motor and the suction fan, and wherein the dust collection pipe includes an aperture portion aligned with the delivery pipe.

[0008] Other features and aspects of the present invention will become apparent by considering the following detailed description and accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a front perspective view of an exemplary handheld power tool assembly including a rotary hammer and an exemplary dust extractor.

[0010] Figure 2 is a side view of a dust collector according to one embodiment, wherein the dust collection tube is in an extended position.

[0011] Figure 3 yes Figure 2 Side view of a dust collector with the dust collecting pipe in the middle.

[0012] Figure 4 yes Figure 2 Side view of a dust collector with the dust collection tube in a folded position.

[0013] Figure 5 yes Figure 2 A bottom perspective view of a dust collector with the dust collecting tube in an extended position.

[0014] Figure 6 yes Figure 2 A bottom-up stereoscopic view of a dust collector with the dust collecting pipe in the middle.

[0015] Figure 7 yes Figure 2 A bottom perspective view of a dust collector with the dust collecting tube in a folded position.

[0016] Figure 8 yes Figure 2 A top view of a dust collector with the dust collecting tube in the extended position.

[0017] Fig. 9 is along Figure 8 The section line 9-9 is taken Figure 2 A cross-sectional view of a dust collector with the dust collection tube in the extended position.

[0018] Fig.10 is along Fig. 9 An enlarged cross-sectional view taken along section line 10-10 of the embodiment of the present invention, wherein the dust collecting tube is in an extended position.

[0019] Fig.11 is along Fig. 9 An enlarged cross-sectional view taken along section line 11-11.

[0020] Fig.12 is along Fig.10 The section line 12-12 is taken Figure 2 A cross-sectional view of a dust collector with the dust collection tube in the extended position.

[0021] Fig.13 yes Figure 2 An end view of the cover of a dust collector.

[0022] Fig.14 yes Figure 2 A first side end view of a housing of a dust collector.

[0023] Fig.15 is along Figure 8 The section line 9-9 is taken Figure 2 A cross-sectional view of a dust collector with the dust collecting tube in the middle.

[0024] Fig.16 is along Figure 8 The section line 9-9 is taken Figure 2 A cross-sectional view of a dust collector of FIG. 1 , but with the dust collecting tube in the folded position.

[0025] Fig.17 is along Figure 8 A cross-sectional view of the dust collecting tube and the cover taken along section line 17-17.

[0026] Fig.18 is a detailed view of the cover.

[0027] Fig.19 is along Figure 8 A cross-sectional view of the dust collecting duct and the dust collector housing taken along section line 19-19.

[0028] Fig. 20 is along Figure 8 A cross-sectional view of the dust collector motor and dust collector housing taken along section line 20-20.

[0029] Fig.21 is a perspective view of a dust collector motor and dust collector housing with a portion of the dust collector housing removed.

[0030] Before explaining any embodiment of the utility model in detail, it should be understood that the application of the utility model is not limited to the details of the component construction and arrangement set forth in the following description or shown in the following drawings. The utility model can have other embodiments and can be practiced or executed in a variety of different ways. In addition, it should be understood that the words and terms used herein are for descriptive purposes and should not be regarded as limiting. DETAILED DESCRIPTION

[0031] Figure 1 A power tool assembly 10 is shown according to one embodiment, which includes a power tool 14 (such as a rotary hammer 14) and a dust collector 18. The rotary hammer 14 is shown to be operably connected to the dust collector 18. In some embodiments, the dust collector 18 can be removed from the rotary hammer 14 and applied to another power tool 14 or another rotary hammer 14. The dust collector 18 includes a dust collector housing 20 and a telescopic dust collection tube 22.

[0032] The rotary hammer 14 includes a housing 38 having a body 42 and a handle 46 extending rearwardly of the body 42. A chuck assembly 50 is disposed on the housing 38 opposite the handle 46. The chuck assembly 50 is operable to receive a tool bit 54 therein. The tool bit 54 extends along the working axis A1 of the rotary hammer 14.

[0033] The drive unit 58 is positioned within the body 42 of the housing 38. The drive unit 58 includes a motor 62 and a drive assembly 66 (i.e., a transmission system) that is operably coupled to the motor 62 to receive torque from the motor 62. In the illustrated embodiment, the motor 62 is aligned substantially along the working axis A1 of the rotary hammer 14. The working axis A1 extends through the cutter head 54 and the drive assembly 66. The drive assembly 66 is further coupled to the chuck assembly 50 to transmit the torque of the motor 62 to the cutter head 54. The motor 62 is powered by a battery 70 that can be received in a battery receptacle 74 at the bottom of the handle 46. However, in other embodiments, the battery receptacle 74 may be located on the dust collector 18 or the rotary hammer 14 differently from this. The drive unit 58 further includes a trigger 78. When the trigger 78 is pressed, current is transmitted from the battery 70 to the motor 62 to drive the motor 62 and the cutter head 54 to rotate. In some embodiments, the motor 62 may be coupled to a cooling fan 82 operable to generate a cooling air flow within the housing 38 to transfer cool air along the drive unit 58 .

[0034] The dust collector 18 is provided as a separate component from the rotary hammer 14. Figure 1 In the assembly shown in FIG. 1 , the dust collector 18 can be connected to the rotary hammer 14. Fig. 9As shown, for example, the dust collector 18 includes a nozzle 86, a telescopic dust collection tube 22, a dust collection container 90, a filter 94, and a suction fan 98. The nozzle 86 is located at the first end 22a of the telescopic dust collection tube 22 and is close to the cutter head 54 of the rotary hammer 14 so that the cutter head 54 extends through the nozzle 86. In other words, the working axis A1 is aligned with the nozzle 86. The second end 22b of the telescopic dust collection tube 22 is operable to extend and retract from the first end 30 of the dust collector 18 toward the opposite second end 34 of the dust collector 18.

[0035] The dust collector 18 may be fixed to the rotary hammer 14 by a connection mechanism 88. The connection mechanism 88 may include mechanical connection mechanisms 88a, 88c and an electrical connection mechanism 88b. Figures 2 to 4 As shown, the mechanical connection mechanism 88a may include a spring biased latch portion for securing the dust collector 18 to the rotary hammer 14. The mechanical connection mechanism 88a can be actuated to disconnect the dust collector 18 from the rotary hammer 14, and can be actuated to connect the dust collector 18 to another power tool 14. In the illustrated embodiment, the mechanical connection mechanism 88a is adjacent to the first end 30. The mechanical connection mechanism 88c can further include a set of tracks that can be slidably engaged with a corresponding set of tracks on the rotary hammer 14. In the illustrated embodiment, the electrical connection mechanism 88b can be located near the second end (i.e., the rear end) 34. The electrical connection mechanism 88b can be configured to transmit power and / or signals between the dust collector 18 and the rotary hammer 14.

[0036] The dust container 90 is selectively attachable to the dust collector 18. The dust container 90 is detachable from the dust collector 18 and can be removed to allow an operator to empty the dust and other debris in the dust container 90. A latch 102 is located on the dust container 90 or on the dust collector 18. The latch 102 is operable to selectively decouple the dust container 90 from the dust collector 18. Figures 2 to 4 In the illustrated embodiment, the latch portion 102 is disposed on the side wall of the dust container 90, and the latch portion 102 can be moved in a direction toward the interior of the dust container 90 to remove the dust container 90 from the dust collector 18. In some embodiments, the dust container 90 can be prevented from being fixed to the dust collector 18 when the filter 94 is not in place. For example, Fig. 9 As shown, the filter 94 can serve as a part of the connection between the dust collection container 90 and the dust collector 18. Therefore, without the filter 94 in place, the dust collection container 90 is prevented from being coupled to the dust collector 18.

[0037] like Fig. 9As shown, the dust collection container 90 includes an inlet 106 for dust-laden air flow and an outlet 110 defined by the outlet end of the filter 94. More specifically, the dust collection container 90 includes opposite side walls 114 and a top wall 118a and a bottom wall 118b extending between the side walls 114, respectively. In addition, the dust collection container 90 includes an end wall 122 adjacent to both the side walls 114 and the bottom wall 118b. An opening 126 is defined in the first end wall 122a, through which the filter 94 is received. The top wall 118a further includes an inlet 106 for dust-laden air.

[0038] The dust container 90 is in fluid communication with the filter 94. In some embodiments, the filter 94 can be positioned within the dust container 90. In other embodiments, the filter 94 is positioned differently between the dust container 90 and the suction fan 98. In other embodiments, the filter 94 can be positioned at other locations of the dust container 90. In some embodiments, the filter 94 is a high efficiency particulate air ("HEPA") filter positioned between the dust container 90 and the suction fan 98.

[0039] The suction fan 98 is coupled to an output shaft 134 of a suction motor 138. The suction motor 138 is disposed within the dust collector 18. In the illustrated embodiment, the suction motor 138 is different from the motor 62 of the rotary hammer 14. When the dust collector 18 is engaged with the rotary hammer 14, the output shaft 134 of the suction motor 138 rotates around a fan axis A2 that is substantially parallel to the working axis A1. The suction fan 98 rotates around the fan axis A2, and the suction fan 98 is disposed in front of the suction motor 138. However, in some embodiments, the suction fan 98 may be coupled to the suction motor 138 via other mechanical devices such as a clutch, a belt, or a power output device.

[0040] In some embodiments, the suction motor 138 can be electrically coupled to the battery 70 of the rotary hammer 14. In other embodiments, the suction motor 138 can be electrically coupled to another power source (not shown), such as a power source mounted on the dust collector 18. In some embodiments, the suction motor 138 can be operated when the motor 62 is operated. In other words, the trigger 78 can cause both the motor 62 and the suction motor 138 to rotate. The suction motor 138 can be operated differently from this.

[0041] When rotated by the suction motor 138, the suction fan 98 generates an airflow that creates a vacuum in the dust collection duct 22 (more specifically, within the spring tube 22c, as discussed in detail below) to draw dust and other debris into the dust collection container 90 and through the filter 94. After the dust is separated from the air via the filter 94, the clean air is discharged through an exhaust port 142 formed in the dust collector 18 adjacent to the suction fan 98. The exhaust port 142 may be adjacent to the outlet 110.

[0042] refer to Fig. 9 and Fig.11 , the filter cleaning mechanism 170 is disposed within the dust collector 18 and is located proximate to the filter 94. The filter cleaning mechanism 170 includes an anvil 174 for striking the filter 94, a striking piece 178 for striking the anvil 174, a solenoid 182 for causing the striking piece 178 to strike the anvil 174, and a biasing member 186 for biasing the striking piece 178. In some embodiments, the filter cleaning mechanism 170 may not include the anvil 174. In such embodiments, the striking piece 178 directly strikes the filter 94. In the illustrated embodiment, the biasing member 186 is a compression spring. The biasing member 186 biases the striking piece 178 toward a first striking piece position in contact with the anvil 174, with the anvil 174 spaced apart from the filter 94, until the solenoid 182 is activated, at which time the solenoid 182 depresses the biasing member 186, thereby moving the striking piece 178 to a second striking piece position in contact with the anvil 174, with the anvil 174 contacting the filter 94. In some embodiments, a second biasing member, such as a torsion spring, is coupled to the anvil 174 for biasing the anvil 174 to the first anvil position.

[0043] In some embodiments, the filter cleaning mechanism 170 is automatically activated when the suction fan 98 is not working. The controller (not shown) controls the solenoid 182 to be activated, triggering the anvil 174 to contact the filter 94. The impact of the anvil 174 on the filter 94 causes dust and other debris to fall off the filter 94. After the anvil 174 hits the filter 94, the solenoid 182 is automatically deactivated, allowing the anvil 174 and the striking member 178 to return to the position before the impact.

[0044] refer to Fig. 9 , Fig.15 and Fig.16The dust collection tube 22 is operable to collect dust and other debris from the workpiece W during the drilling and / or hammering operation by the rotary hammer 14 to keep the user's work area substantially free of dust and other debris. The dust collected by the dust collection tube 22 is directed into the dust collection container 90, passes through the filter 94, and the clean air is discharged from the dust collector 18. The delivery tube 130 extends from the inlet 106 of the dust collection container 90 to guide the dust-laden air from the dust collection tube 22 into the dust collection container 90. In some embodiments, the delivery tube 130 includes a 90-degree bend. In other embodiments, the delivery tube 130 may include a bend between 0 degrees and 180 degrees. The delivery tube 130 guides the dust-laden air into the dust collection container 90 located upstream of the filter 94. Accordingly, the delivery tube 130 is positioned at the center portion of the dust collector 18 between the first end 30 and the second end 34 of the dust collector. This allows the conveying duct 130 to be positioned as far back as possible, providing sufficient space for the dust collection duct 22 while also ensuring that the dust-laden air enters the dust collection container 90 upstream of the filter 94 .

[0045] However, since the dust delivery duct 130 is centrally located within the dust collector 18, the dust collection duct 22 extends beyond the dust delivery duct 130 when the dust collection duct 22 is in the fully retracted position. In particular, at least the rear end of the dust delivery duct 130 extends beyond or at least partially beyond the dust delivery duct 130. In order to allow the dust collection duct 22 to extend beyond the delivery duct 130 when in the retracted position, the dust collection duct 22 includes an aperture portion 23. The aperture portion 23 is aligned with the delivery duct 130 so that the delivery duct 130 extends through the aperture portion 23 when the dust collection duct 22 is in the retracted position.

[0046] Continue to refer Fig. 9 , the dust collecting tube 22 includes a spring tube 22c positioned in the dust collecting tube 22. The spring tube 22c is connected to both the delivery tube 130 and the nozzle 86. In this way, fluid and debris can pass through the spring tube 22c between the nozzle 86 and the delivery tube 130. During operation of the dust collector 18, a vacuum is generated in the spring tube 22c. The vacuum provides the power to suck the fluid and debris from the nozzle 86, through the spring tube 22c and the delivery tube 130 into the dust collecting container 90. Since the spring tube 22c is located in the dust collecting tube 22, the dust collecting tube 22 provides structural support for the spring tube 22c. The dust collecting tube 22 can prevent the spring tube 22c from being damaged. The spring tube 22c is flexible, allowing the dust collecting tube 22 to be in a folded position ( Figure 7 ) and extended position ( Figure 5 ) when the spring tube 22c is expanded and contracted. It is conceivable that the dust collecting tube 22 may include or not include the spring tube 22c.

[0047] Continue to refer Fig. 9The dust collecting tube 22 extends longitudinally in the dust collector 18 in a direction parallel to the working axis A1. The dust collecting tube 22 is configured to slide along its longitudinal axis, thereby adjusting the length of the dust collecting tube 22 outside the housing of the dust collector 18 and the position of the nozzle 86. The dust collecting tube 22 is initially in an extended position, such as Fig. 9 When the cutter head 54 is inserted into the workpiece, the dust collecting tube 22 is retracted into the dust collector 18 in a telescopic manner, as shown in FIG. Fig.15 and Fig.16 shown.

[0048] like Figure 2 and Figure 3 As best shown, a feed depth stop 146 is included within the dust collector 18 that limits the extent to which the dust collection tube 22 can be retracted into the dust collector 18, thereby limiting the extent to which the tool head 54 can be advanced into the workpiece. The feed depth stop 146 is movable along the length of the dust collection tube 22 and is selectively fixed to limit the extent to which the dust collection tube 22 can be retracted into the dust collector 18.

[0049] The dust collecting tube 22 of the dust collector 18 also includes a cover 150, which is used to close the opening portion 23 of the dust collecting tube 22 to prevent chips, dust and dirty airflow from escaping into the surrounding environment. As previously discussed, the dust collecting tube 22 includes the opening portion 23, which allows the dust collecting tube 22 to be retracted into the housing of the dust collector 18 without the delivery tube 130 interfering with the movement of the dust collecting tube 22. In order to allow the dust collecting tube 22 to extend beyond the delivery tube 130, the opening portion 23 is aligned with the delivery tube 130 so that when the dust collecting tube 22 moves toward the retracted position, the delivery tube 130 extends through the cutout portion and enters a portion of the dust collecting tube 22 (such as Fig.16 However, when the dust collecting tube 22 is in the extended position outside the housing of the dust collector 18, the opening portion 23 is exposed. Therefore, the cover 150 is configured to close the opening portion 23 when the dust collecting tube 22 is extended.

[0050] like Fig. 9 , Fig.15 and Fig.16 As shown, the cover 150 is slidably coupled to the dust collection tube 22. When the dust collection tube 22 translates between the extended position and the retracted position, the cover 150 generally moves with the dust collection tube 22. However, the cover 150 can also move relative to the dust collection tube 22. When the dust collection tube 22 is in the extended position ( Fig. 9 and Fig.15 ), the cover 150 is aligned to cover the opening portion 23 of the dust collecting tube 22. Specifically, the cover 150 is positioned at the rear end of the dust collecting tube 22, where the cover can close the opening portion 23. When the dust collecting tube 22 is in the retracted position ( Fig.16), the cover 150 moves toward the front of the dust collecting pipe 22 so that the dust collecting pipe 22 can extend through the conveying pipe 130.

[0051] like Fig.17 and Fig.18 As shown, the cover 150 is shaped as a curved plate or a partial cylinder that matches the shape of the dust collecting tube 22. In other words, the cover 150 has a curved cross section corresponding to the curvature (e.g., cross-sectional shape) of the dust collecting tube 22. The length of the cover 150 is approximately equal to or slightly greater than the length of the opening portion 23 of the dust collecting tube 22. In some embodiments, the opening portion 23 and the cover 150 extend to 25% to 75% of the length of the dust collecting tube 22. For example, in some embodiments, the opening portion 23 and the cover 150 are approximately 50% of the length of the dust collecting tube 22. In some embodiments, the opening portion 23 and the cover 150 extend to at least 30% of the length of the dust collecting tube 22. In some embodiments, the opening portion 23 and the cover 150 extend to at least 50% of the length of the dust collecting tube 22. The longer the opening portion, the more the dust collecting tube 22 can overlap with the conveying tube 130 without interference. Similarly, the longer the opening portion, the more forward the position of the conveying tube 130 in the housing 20 without interfering with the dust collecting tube 22.

[0052] The cover 150 includes a track 153 that engages with a corresponding channel 155 of the dust collection tube 22, allowing the cover 150 to slide relative to the dust collection tube 22. The track 153 and the channel 155 form a frictional engagement between the cover 150 and the dust collection tube 22, so that when the dust collection tube 22 translates between the extended position and the retracted position, the cover 150 slides with the dust collection tube 22 (i.e., the cover is fixed to the dust collection tube). However, when the reaction force overcomes the friction between the cover 150 and the dust collection tube 22, the cover 150 can slide relative to the dust collection tube 22. Accordingly, the track 153 and the channel 155 allow the cover 150 to be used for a variety of purposes, including fixing the cover 150 to the dust collection tube 22, and allowing the cover 150 to perform relative linear movement relative to the dust collection tube 22.

[0053] The cover 150 further includes an end plate 154 (at Fig.13 and Fig.18 150) to help limit the movement of the cover 150. First, the end plate 154 helps prevent the cover 150 from extending too far out of the dust collector 18 and falling off. When the dust collection tube 22 translates toward the extended position, the cover 150 moves with the dust collection tube 22. When in the extended position ( Figure 2 , Figure 5 , Fig. 9), the dust collection tube 22 extends beyond the first end of the dust collector 18. A portion of the dust collection tube 22 is located within the dust collector 18 so that the dust collection tube 22 remains in fluid communication with the delivery tube 130. When the dust collection tube 22 moves toward the extended position, the end plate 154 abuts against the inner surface 157 of the first end 30 of the dust collector 18 to secure the cover 150 within the dust collector 18 and prevent the cover 150 from falling off the dust collector 18.

[0054] In addition, the end plate 154 is also configured to start the movement of the cover 150 relative to the dust collecting tube 22. When the dust collecting tube 22 translates toward the folded position (or retracted position), the dust collecting tube 22 stops translating until it reaches the stop wall 162. However, the cover 150 stops translating before the dust collecting tube 22 translates. Specifically, the end plate 154 is configured to abut against the retaining wall 158 in the dust collector 18 before the dust collecting tube 22 reaches the stop wall 162. In some embodiments, the end plate 154 can be configured to abut against the conveying tube 130 instead of the retaining wall 158. When the end plate 154 contacts the retaining wall 158 or the conveying tube 130, as the dust collecting tube 22 retracts toward the folded position, the cover 150 stops translating with the dust collecting tube 22. When the cover 150 stops translating, the open hole portion 23 of the dust collecting tube 22 is exposed, thereby allowing the dust collecting tube 22 to extend through the conveying tube 130 without interference.

[0055] Figure 12 to Figure 14 and Figure 17 to Figure 18 The dust collection tube 22, the cover 150 and the end plate 154 are shown in detail. Fig.12 and Fig.17 Two different cross-sectional views of the cover and dust collection tube 22 are provided. Fig.12 , the cross section of the dust collecting tube 22 includes a cross section peripheral portion 22b, which has a radially extending notch 22c and terminates in a tang 22d extending radially inward from the notch 22c. The end plate 154 includes a side protrusion 154a and a cross section peripheral portion 154b having a radially extending notch 154c. The end plate 154 further includes a connecting portion 154d that is thinner than the notch 154c in the radial direction, and the connecting portion 154d is located between the side protrusion 154a and the notch 154c. The cover 150 includes a cross section peripheral portion 150b, which includes a similar notch 150c and a connecting portion 150d. The sizes of the notches 150c, 154c are designed to fit within the notch 22c to allow translation between the cover 150 and the dust collecting tube 22. The tang 22d is sized to slidably engage the connecting portion 154d to allow translation between the cover 150 and the dust collection tube. Fig.17 , a cross section of the dust collecting tube 22 and the cover 150 shows tracks 153 and channels 155 through which the cover 150 slides relative to the dust collecting tube 22.

[0056] Fig.13 and Fig.18 The cover 150 is shown alone, and Fig.14 The first end 30 of the dust collector housing 20 is shown. The first end 30 is provided with an opening 30a through which the dust collection tube 22 extends. The opening 30a is defined by a peripheral portion 30b, which generally includes an opening 30c corresponding to the notch 154c. However, the side tabs 154a of the end plate 154 are designed to be larger than the size of the peripheral portion 30b. Thus, the end plate 154 is configured to abut the inner surface of the first end 30 to prevent the cover 150 from being withdrawn from the dust collector 18.

[0057] Fig.19 The connection between the dust collecting tube 22 and the dust collector housing 20 is shown. In the illustrated embodiment, two bushings 160a, 160b are positioned between the dust collecting tube 22 and the dust collector housing 20. The bushings 160a, 160b are attached to the dust collecting tube 22 by fasteners 164a, 164b, respectively. The dust collector housing 20 includes features 168 (e.g., protrusions, flanges, and channels) whose size and shape are designed to slidably support the bushings 160a, 160b relative to the dust collector housing 20. For example, some features 168 are used as tracks for slidably supporting the bushings 160a, 160b. In the illustrated embodiment, the features 168 are arranged adjacent to the opposite side surfaces of each bushing 160a, 160b to limit the translation of the dust collecting tube 22 in the axial direction. In the illustrated embodiment, the bushings 160a, 160b are slidable along the feature 168 in a direction parallel to the working axis A1 (eg, Fig.19 In this way, the dust collection tube 22 and the cover 150 can be translated between the extended position and the retracted position.

[0058] Fig. 20 and Fig.21The connection between the suction motor 138 and the dust collector housing 20 is shown. The dust collector housing 20 includes arms 172, which are configured to fix the suction motor 138 to the dust collector housing 20. In the embodiment shown, the arms 172 protrude radially inward from the outside of the dust collector housing 20 toward the suction motor 138. The size of the arm 172 is designed to receive a buffer 176 therein. The buffer 176 is positioned between the arm 172 and the suction motor 138. The size of the buffer 176 is designed so that an interference fit is achieved between the suction motor 138, the buffer 176 and the arm 172. The buffer 176 is deformable to occupy the space between the suction motor 138 and the arm 172. In the embodiment shown, the geometry of the buffer 176 is cylindrical. The buffer 176 can also adopt other geometric shapes. In the illustrated embodiment, the bumper 176 is cylindrical prior to securing the suction motor 138 within the arm 172 and has a deformed, generally cylindrical geometry when the bumper 176 secures the suction motor 138 within the arm 172 . Fig. 20 A buffer 176 is shown having a cylindrical geometry that provides an interference fit between the suction motor 138 and the arm 172 .

[0059] The buffer 176 fixes the suction motor 138 to prevent the suction motor from rotating unexpectedly in the dust collector housing 20. The buffer 176 weakens the vibration transmitted to the dust collector housing 20 by the suction motor 138. The buffer 176 is elastic and can be mutually deformed between a cylindrical shape and a deformed cylindrical shape during the use of the dust collector 18. In the illustrated embodiment, the buffer 176 is a separate component separated from the dust collector housing 20. In other words, in the illustrated embodiment, the buffer 176 is positioned on the arm 172 during the process of assembling the suction motor 138 in the dust collector housing 20. The buffer 176 shown is separated from the arm 172. However, in other embodiments, the buffer 176 can be integrated with the arm 172.

[0060] Although the invention has been described in detail with reference to certain preferred embodiments, variations and modifications exist within the scope and spirit of one or more independent aspects of the invention described.

[0061] Various features and advantages of the invention are set forth in the appended claims.

Claims

1. A dust collector comprising: nozzle; Dust collector housing; a dust collection tube coupled to the nozzle and slidable relative to the dust collector housing between an extended position and a retracted position; a dust collection container selectively coupled to the dust collector housing; as well as a conveying pipe configured to guide air from the dust collecting pipe to the dust collecting container; The invention is characterized in that the dust collecting pipe comprises an opening portion and a cover, the opening portion is aligned with the conveying pipe, and the cover is slidably connected to the dust collecting pipe to selectively close the opening portion.

2. The dust collector according to claim 1, wherein: When the dust collecting tube is in the retracted position, the rear end of the dust collecting tube extends beyond the conveying tube.

3. The dust collector according to claim 1, wherein: When the dust collecting tube is in the retracted position, the conveying tube extends through the opening portion and enters the dust collecting tube.

4. The dust collector according to claim 1, wherein: The cover and the dust collection tube are in frictional engagement, wherein the frictional engagement enables the cover to translate with the dust collection tube when the dust collection tube translates between the extended position and the retracted position, and wherein the frictional engagement enables the cover to slide relative to the dust collection tube when a reaction force is applied.

5. The dust collector according to claim 1, wherein: One of the cover and the dust collection duct includes a track, and the other of the cover and the dust collection duct includes a channel.

6. The dust collector according to claim 1, wherein: The cover includes an end plate on a first end of the cover, the end plate being configured to limit movement of the cover relative to the dust collecting tube.

7. The dust collector of claim 6, further comprising a retaining wall, wherein: When the dust collecting tube slides toward the retracted position, the end plate abuts against the retaining wall.

8. The dust collector according to claim 6, wherein: When the dust collecting tube slides toward the extended position, the end plate abuts against the inner surface of the shell.

9. The dust collector according to claim 1, wherein: The cover has a curved shape corresponding to a cross-sectional shape of the dust collecting tube.

10. The dust collector according to claim 1, wherein: The delivery tube includes a bend between 0 and 180 degrees.

11. A dust collector comprising: Dust collector housing; a dust collection container including an inlet for receiving dust-laden air; a duct positioned within the dust collector housing and arranged to direct dust laden air into the dust collection container; as well as a dust collecting pipe which is slidable relative to the conveying pipe and is configured to draw dust-laden air into the dust collector, Characterized in that the dust collecting tube comprises an opening portion aligned with the conveying tube to allow the dust collecting tube to slide from the extended position to the retracted position without being interfered by the conveying tube.

12. The dust collector according to claim 11, wherein: When the dust collecting tube is in the retracted position, the rear end of the dust collecting tube extends beyond the conveying tube.

13. The dust collector according to claim 11, wherein: When the dust collecting tube is in the retracted position, the conveying tube extends through the opening portion and enters the dust collecting tube.

14. The dust collector according to claim 11, wherein: The open portion extends to at least 30% of the length of the dust collecting pipe.

15. The dust collector according to claim 11, wherein: The open portion extends to at least 50% of the length of the dust collecting pipe.

16. The dust collector of claim 11, further comprising a suction motor coupled to the suction fan, wherein The conveying duct is positioned in front of the suction motor, and the suction fan is positioned within the dust collector housing.

17. A dust collector comprising: Dust collector housing; a dust collection container selectively coupled to the dust collector housing; a dust collecting tube, the dust collecting tube being able to slide relative to the dust collector housing between an extended position and a retracted position; a suction fan configured to generate a vacuum airflow within the dust collector; a suction motor drivingly engaged with the suction fan; as well as a conveying pipe configured to guide air from the dust collecting pipe to the dust collecting container, the conveying pipe being positioned in front of the suction motor and the suction fan, The invention is characterized in that the dust collecting pipe comprises an opening portion aligned with the conveying pipe.

18. The dust collector according to claim 17, wherein: When the dust collecting tube is in the retracted position, the conveying tube extends through the opening portion and enters the dust collecting tube.

19. The dust collector according to claim 18, wherein: The dust collecting duct comprises a cover arranged to close the opening portion when the dust collecting duct is in the extended position.

20. The dust collector according to claim 19, wherein: The cover is slidably coupled to the dust collecting tube.

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