Power tool assembly and dust remover

Abstract

The utility model discloses a power tool assembly. The power tool assembly comprises a power tool and a dust remover, the power tool comprises an output chuck, a shell, a motor and a fan. The output chuck is configured to receive a tool bit for performing a working operation, and defines an output axis. The housing defines a suction inlet. The motor is disposed within the housing and defines a drive axis. The fan is rotationally driven by the motor and is configured to induce a flow of suction air through the suction inlet. The dust remover is detachably connected to the power tool and comprises a tool connecting pipe, and when the dust remover is connected to the power tool, the tool connecting pipe is connected with the suction inlet. A flow of suction air caused by the fan flows from the scrubber to the power tool in a direction extending parallel to the output axis.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to U.S. Provisional Application No. 63 / 519,630, filed on August 15, 2023, which claims priority to U.S. Provisional Application No. 63 / 505,021, filed on May 30, 2023, the entire contents of each of which are incorporated herein by reference. Technical Field

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

[0004] Dust collectors are typically used with handheld drilling tools (such as rotary hammers) to collect dust and other debris during drilling operations to prevent dust and other debris from accumulating at the work site. Such dust collectors can be attached to the rotary hammer to position the suction inlet of the collector close to the drill bit attached to the rotary hammer. Such dust collectors can also include an onboard dust container in which dust and other debris accumulate. Such dust containers can usually be removed from the dust collector to facilitate disposal of the accumulated dust and debris. Utility Model Content

[0005] On the one hand, the technology described herein relates to a power tool assembly including a power tool and a dust collector. The power tool includes an output chuck, a housing, a motor and a fan. The output chuck is configured to receive a cutter head for performing a working operation and defines an output axis. The housing defines a suction inlet. The motor is disposed in the housing and defines a drive axis. The fan is rotationally driven by the motor and is configured to cause a suction air flow through the suction inlet. The dust collector is detachably connected to the power tool and includes a tool connection pipe, which is connected to the suction inlet when the dust collector is connected to the power tool. The suction air flow caused by the fan flows from the dust collector to the power tool in a direction extending parallel to the output axis.

[0006] In some aspects, the technology described herein relates to a power tool assembly wherein the output axis and the drive axis are perpendicular.

[0007] In some aspects, the technology described herein relates to a power tool assembly wherein the dust collector includes a filter, and wherein the filter is disposed at an oblique angle relative to the output axis and the drive axis.

[0008] In some aspects, the technology described herein relates to a power tool assembly, wherein the power tool further includes a transmission assembly having an intermediate shaft extending along a transmission axis, and wherein the transmission axis extends parallel to and is positioned below the output axis.

[0009] In some aspects, the technology described herein relates to a power tool assembly, wherein one of the power tool and the dust collector includes a latch mechanism having a pivotable latch, and the other of the power tool and the dust collector includes a slot for receiving the latch to couple the power tool and the dust collector together.

[0010] In some aspects, the technology described herein relates to a power tool assembly wherein the latch mechanism further includes a spring that biases the latch to a locked position and a button that is depressible to adjust the latch to an unlocked position.

[0011] In some aspects, the technology described herein relates to a power tool assembly, wherein the fan includes a first fan portion, the first fan portion is configured to cause a cooling air flow to enter the housing at an air inlet formed in the housing, and is configured to blow the cooling air flow out of the housing through a vent formed in the housing, and wherein the cooling air flow travels in a first direction along the drive axis from the air inlet to the vent.

[0012] In some aspects, the technology described herein relates to a power tool assembly, wherein the fan includes a second fan portion, the second fan portion being configured to cause a suction air flow to enter the housing through the suction inlet and being configured to blow the suction air flow out of the vent, wherein the suction air flow travels from the suction inlet to the vent along the drive axis in a second direction, and wherein the first direction and the second direction are opposite directions.

[0013] On the other hand, the technology described herein relates to a power tool assembly including a power tool and a dust collector. The power tool includes an output chuck, a tool housing, a motor and a fan. The output chuck is configured to receive a cutter head for performing a working operation and defines an output axis. The tool housing includes a suction duct defining a suction inlet. The motor is disposed in the housing and has an output shaft defining a drive axis. The fan is rotationally driven by the motor and is configured to cause a suction air flow through the suction inlet. The dust collector is detachably coupled to the power tool and includes an outlet configured to engage the suction inlet so that the fan of the power tool causes the suction air flow through the dust collector. The dust collector further includes a dust collector housing and a tool connection pipe. The dust collector housing has a front end and a rear end. The tool connection pipe defines an outlet of the dust collector and is configured to engage with the suction inlet of the power tool. A portion of the tool connection pipe extends parallel to the output axis and extends from a wall of the dust collector housing. The dust collector is configured to be attached to a tool housing of the power tool by sliding the dust collector in a front-to-rear direction until the tool connection tube engages with the suction inlet.

[0014] In some aspects, the technology described herein relates to a power tool assembly wherein the suction inlet includes a barrier and wherein, when the dust collector is coupled to the power tool, the outlet engages the barrier such that the barrier inhibits leakage of suction air from the power tool assembly at a connection point between the power tool and the dust collector.

[0015] In some aspects, the technology described herein relates to a power tool assembly, wherein one of the power tool and the dust collector includes a latch mechanism having a pivotable latch and a spring that biases the pivotable latch to a locked position, and the other of the power tool and the dust collector includes a slot for receiving the latch to couple the power tool and the dust collector together.

[0016] In some aspects, the technology described herein relates to a power tool assembly, wherein attachment of the dust collector to the power tool includes sliding the top surface of the rear housing portion of the dust collector in a front-to-rear direction along the bottom surface of the suction duct so that the bottom surface of the suction duct overcomes the bias of the spring to move the pivotable latch, and wherein, after the pivotable latch reaches the slot during the sliding, the spring biases the pivotable latch into the slot.

[0017] In some aspects, the technology described herein relates to a power tool assembly, wherein the dust collector further includes a rubber gasket that extends from the dust collector housing to engage the tool housing of the power tool when the power tool and the dust collector are coupled together, the rubber gasket being configured to suppress relative shaking between the power tool and the dust collector.

[0018] On the other hand, the technology described herein relates to a dust collector configured to be detachably attached to a power tool. The dust collector includes: a housing, a dust box, a suction pipe, a suction head, a tool connection pipe, an outlet and a filter. The dust box is pivotally connected to the housing. The suction pipe can slide into and out of the housing along a longitudinal axis extending in a front-to-back direction. The suction head is positioned at the forward end of the suction pipe and defines a first end of a flow path so that suction air is configured to flow into the dust collector at the suction head. The tool connection pipe is supported in the housing. A portion of the tool connection pipe extends from the wall of the housing and extends parallel to the suction pipe in the front-to-back direction. The outlet is positioned at the rearward end of the tool connection pipe and defines a second end of the flow path so that suction air is configured to flow out of the dust collector at the outlet. The filter is positioned between the suction pipe and the tool connection pipe along the flow path. The filter is configured to separate dust and debris from the suction air traveling along the flow path. The filter is disposed at an oblique angle relative to the longitudinal axis.

[0019] In some aspects, the technology described herein relates to a dust collector, wherein the suction pipe is configured to extend along an extension direction relative to the housing, and wherein a portion of the tool connection pipe extending from a wall of the housing extends parallel to the extension direction.

[0020] In some aspects, the technology described herein relates to a dust collector, wherein the filter is oriented at a 45 degree angle relative to the extension direction of the suction duct.

[0021] In some aspects, the technology described herein relates to a dust collector further comprising a dust box connecting pipe positioned within the housing between the suction pipe and the dust box, the dust box connecting pipe extending below the suction pipe and parallel to the suction pipe.

[0022] In some aspects, the technology described herein relates to a dust collector, wherein the dust box connecting pipe includes a 90 degree turn at a connection point with the suction pipe and a 90 degree turn at a connection point with the dust box.

[0023] In some aspects, the technology described herein relates to a dust collector, wherein the dust box supports at least a portion of the filter, and wherein the dust box connecting pipe guides air flow from the suction pipe into the dust box.

[0024] In some aspects, the technology described herein relates to a dust collector wherein the outlet is a flange integrally formed with the tool connection tube at the end of the tool connection tube outside the housing.

[0025] 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

[0026] Figure 1 is a perspective view of a power tool assembly including a power tool, a dust collector, and an auxiliary handle according to an embodiment of the present disclosure.

[0027] Figure 2A yes Figure 1 A stereoscopic view of a power tool.

[0028] Figure 2B yes Figure 1 Another perspective view of the power tool.

[0029] Figure 3 is along Figure 2A A cross-sectional view of the power tool taken along line 3-3 in FIG.

[0030] Figure 4A A front perspective view of a portion of a power tool.

[0031] Figure 4B is along Figure 4A A cross-sectional view of the power tool taken along line 4B-4B in FIG.

[0032] Figure 5 A perspective view of a portion of a power tool.

[0033] Figure 6 yes Figure 1 A three-dimensional diagram of a dust collector.

[0034] Figure 7 is along Figure 6 A cross-sectional view of the dust collector taken along line 7-7 in FIG.

[0035] Fig. 8A is a plan view of a portion of a dust collector with the suction pipe in an extended position.

[0036] Figure 8B is a plan view of a portion of a dust collector with the suction tube in the retracted position.

[0037] Fig. 9 is along Figure 6 A cross-sectional view of the dust collector taken along line 9-9 in FIG.

[0038] Fig.10 It is a perspective view of a part of a dust collector.

[0039] Fig.11 It is a perspective view of a dust box for a dust collector.

[0040] Fig.12It is a rear perspective view of a part of the dust box.

[0041] Fig.13 It is a front perspective view of a part of a dust box.

[0042] Fig.14A is a cross-sectional view of a dust collector coupled to a power tool with a latch mechanism in a first position.

[0043] Fig. 14B is a cross-sectional view of a dust collector coupled to a power tool with a latch mechanism in a second position.

[0044] Fig.15 yes Figure 1 A perspective view of the auxiliary handle.

[0045] Fig.16 is a cross-sectional view of a power tool assembly with a dust collector coupled to the power tool.

[0046] Fig.17 is a cross-sectional view of a power tool assembly according to another embodiment of the present disclosure.

[0047] 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 various 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

[0048] Figure 1 A power tool assembly 10 is shown, which includes a power tool 14, a dust collector 18 removably connected or attached to the power tool 14, and an auxiliary handle 22 removably connected to the power tool 14. In the illustrated embodiment, the power tool 14 is a drill or a rotary power tool, which can be configured as an impact rotary power tool, a rotary hammer or a hammer drill. In other embodiments, the power tool 14 can be another type of tool. As will be described in more detail, the dust collector 18 is operable to collect dust and other debris from the workpiece during the drilling and / or hammering operations performed by the power tool 14. The auxiliary handle 22 can be connected to the power tool 14 to provide an additional means of holding and controlling the power tool assembly 10.

[0049] like Figures 2A to 3As shown, the power tool 14 includes a housing 26 having a drive unit housing portion 30, a transmission housing portion 34, a handle housing portion 38, and a battery receptacle portion 42. The drive unit housing portion 30 houses a drive unit 46 that is configured to generate or produce torque. The drive unit housing portion 30 defines a vent 48 ( Figure 2B ). The drive unit housing portion 30 is formed of clamshell halves that can be secured together via fasteners. The transmission housing portion 34 houses a transmission assembly 50 and an impact mechanism 58, the transmission assembly being configured to receive torque from the drive unit 46 and rotationally drive the cutter head 54, the impact mechanism being configured to receive torque from the transmission assembly 50 and apply impact to the cutter head 54. The handle housing portion 38 is configured to be grasped by a user in order to control and operate the power tool 14. In the illustrated embodiment, the handle housing portion 38 is coupled to the transmission housing portion 34 at a first end 38a of the handle housing portion 38 via a resilient member 62, the resilient member being configured to absorb and / or damp vibrations between the transmission housing portion 34 and the handle housing portion 38. The battery receptacle portion 42 is positioned at a second end 38b of the handle housing portion 38 opposite the first end 38a. In the illustrated embodiment, the battery receptacle portion 42 is integrally formed with the drive unit housing portion 30 and the handle housing portion 38. Thus, each of the drive unit housing portion 30, the handle housing portion 38, and the battery receptacle portion 42 comprises clamshell halves coupled together via fasteners. The battery receptacle portion 42 is configured to receive a battery 66 that provides power to the drive unit 46 to produce or generate torque. However, it should be understood that the arrangement of the housing portions may vary depending on the embodiment.

[0050] refer to Figure 3 The orientation of the power tool 14 in the figure has a front end or forward end 14a, a rear end or rearward end 14b, a top end or uppermost end 14c and a bottom end or lowermost end 14d. Thus, the drive unit housing portion 30 is positioned at the forward bottommost section of the power tool 14. The transmission housing portion 34 is positioned above the drive unit housing portion 30, at the forward topmost section of the power tool 14. The handle housing portion 38 is positioned behind the transmission housing portion 34, at the rearward topmost section of the power tool 14. The battery socket portion 42 is positioned below the handle housing portion 38, at the rearward bottommost section of the power tool 14. The following disclosure includes references to directional positions such as forward, rearward, top and bottom positions. Thus, any reference to directional positions is relative to Figure 3 The direction indicated by the symbol is carried out.

[0051] refer to Figure 3, the drive unit 46 includes a printed circuit board assembly ("PCBA") 70, a motor 74, and a fan 78. The PCBA 70 is positioned within the drive unit housing portion 30, adjacent to the battery receptacle portion 42, and is configured to receive power from the battery 66 to control the operation of the motor 74. The motor 74 is a brushless direct current ("BLDC") motor, and is configured to rotate under the control of the PCBA 70 in response to user input (such as actuation of the trigger 82). The motor 74 includes an output shaft 86 that is rotatable about a drive axis A1. The fan 78 is mounted to the output shaft 86 at the bottom end of the output shaft 86. The fan 78 is positioned above the suction inlet 98 defined in the drive unit housing portion 30. As shown Figure 4A and Figure 4B As shown, the fan 78 includes a first fan section 90 and a second fan section 94. The first fan section 90 is positioned between the motor 74 and the second fan section 94. In the illustrated embodiment, the fan 78 includes a partition wall 102 that substantially separates the first fan section 90 and the second fan section 94. Figure 3 and Figure 4B , the first fan section 90 is configured to generate a first air flow P1 ( Fig.16 ), in particular for cooling PCBA 70 and motor 74. The second fan section 94 is configured to generate a second air flow P2 ( Fig.16 ), used as dust collector 18( Figure 1 ) is coupled to the power tool 14 to cause air flow through the dust collector 18, as will be described in further detail. In the illustrated embodiment, the first air flow P1 ( Fig.16 ) and the second air flow P2( Fig.16 ) may be kept substantially separated from each other by the dividing wall 102 until they are exhausted through the vent 48. In other embodiments, the fan 78 may not include the dividing wall 102.

[0052] like Figure 4A and Figure 4B As shown, the drive unit housing portion 30 includes a suction inlet 98 located at the bottommost portion of the housing 26. The suction inlet 98 is defined by a suction duct 106 having a first opening 110a and a second opening 110b. The suction duct 106 bends 90 degrees from the first opening 110a located on the front wall or forward wall 30a of the drive unit housing portion 30 to the second opening 110b located below the fan 78. Thus, the second fan portion 94 of the fan 78 is configured to cause the second air flow P2 ( Fig.16 ) along the front-to-back direction ( Figure 3 ) through the first opening 110a ( Figure 3) enters the suction inlet 98. The second air flow P2 then flows through the second opening 110b in a direction extending parallel to the drive axis A1. It should be understood that the shape of the suction duct 106 may vary in other embodiments, and in other embodiments it may not have a 90 degree turn.

[0053] like Figure 3 and Figure 5 As shown, the transmission assembly 50 includes a bevel gear 114 and an intermediate shaft 118, which defines a transmission axis A2 ( Figure 3 ). The transmission axis A2 is perpendicular to the drive axis A1. In addition, the transmission axis A2 is spaced apart from the drive axis A1 and is positioned below the drive axis A1. The bevel gear 114 includes an input bevel gear 120 and an output bevel gear 122. The input bevel gear 120 is mounted to the output shaft 86 of the drive unit 46 so as to rotate around the drive axis A1 with the output shaft 86. The output bevel gear 122 is supported by the transmission housing portion 34 and is oriented perpendicular to the input bevel gear 120 for converting a rotation about the drive axis A1 from the drive unit 46 into a rotation about the transmission axis A2. An intermediate shaft 118 is also supported by the transmission housing portion 34 and extends through the output bevel gear 122, so that the intermediate shaft 118 is configured to rotate with the output bevel gear 122. The intermediate shaft 118 includes at least one pinion 126 at the end of the intermediate shaft 118 opposite the output bevel gear 122.

[0054] The impact mechanism 58 includes a hammer 130 and an anvil 134 defining an output axis A3 extending in a front-to-rear direction. The output axis A3 is perpendicular to the drive axis A1 and parallel to the transmission axis A2. The hammer 130 is coupled to the intermediate shaft 118 of the transmission assembly 50 so that the rotation of the intermediate shaft 118 causes the hammer 130 to strike the anvil 134 at periodic intervals. Specifically, the hammer 130 strikes the anvil 134 in a direction extending along the output axis A3. The anvil 134 includes an anvil gear 138 that engages with the pinion 126 of the intermediate shaft 118 so that the intermediate shaft 118 is configured to drive the rotation of the anvil 134 via engagement between the pinion 126 on the intermediate shaft 118 and the anvil gear 138 on the anvil 134.

[0055] Continue to refer Figure 3 and Figure 5, the power tool 14 further includes an output chuck 142 extending through the transmission housing portion 34 at the front end 14a of the power tool 14. The output chuck 142 is configured to receive the cutter head 54. In the illustrated embodiment, the output chuck 142 includes a ball pawl mechanism 146 for holding the cutter head 54. When the cutter head 54 is received by the output chuck 142, the cutter head 54 extends along the output axis A3 and is configured to rotate around the output axis. Thus, the output axis A3 may also be referred to as the output axis A3. In other embodiments, the output chuck 142 may include different features for holding the cutter head 54. The output chuck 142 engages with the anvil 134 so that when the cutter head 54 is coupled to the output chuck 142, the rotation from the transmission assembly 50 and the hammer impact from the impact mechanism 58 are transmitted from the anvil 134 to the cutter head 54. Thus, the drive unit 46 is configured to rotationally drive the cutter head 54 through the transmission assembly 50 and the anvil 134 to perform a drilling operation, and is configured to generate an axial impact on the cutter head 54 through the transmission assembly 50 and the impact mechanism 58 to perform a hammering operation. Figure 2A and Figure 5 , the power tool 14 includes a mode selector knob 150 that engages the transmission assembly 50 and the impact mechanism 58 for placing the power tool 14 in a hammer-only mode, a drill-only mode, or a hammer-drill mode.

[0056] Figure 6 and Figure 7 The dust collector 18 is shown. The dust collector 18 includes a dust collector housing 154, a suction pipe 158, a suction head 162, a dust box 166, a dust box connecting pipe 170, a filter 174, a tool connecting pipe 178, and a latch mechanism 182. As will be described in more detail, the dust collector 18 is located in the drive unit housing portion 30 ( Figure 2A ) can be connected to the power tool 14 ( Figure 1 ) is detachably coupled. The dust collector 18 does not include a separate motor 74 and fan 78 for generating the suction air flow. Instead, when the dust collector 18 is coupled to the power tool 14, the dust collector 18 can be aligned with the suction inlet 98 so that the motor 74 and fan 78 on the power tool 14 cause the second air flow P2 ( Fig.16 ) for extracting dust and debris generated during drilling and / or hammering operations of the power tool 14.

[0057] As about Figure 3 The orientation of the power tool 14 is similarly described and referenced to Figure 7 , the dust collector 18 has a front end or forward end 18a, a rear end or backward end 18b, a top end or uppermost end 18c, and a bottom end or lowermost end 18d. Figure 7 The dust collector 18 is connected to the Figure 3 When the power tool 14 is oriented as in the middle, the direction symbols for the power tool 14 and the dust collector 18 are aligned. Return to Reference Figure 6 and Figure 7 , the dust collector housing 154 includes a rear housing portion 186 and a front housing portion 190. When the dust collector 18 is coupled to the power tool 14 ( Figure 2A ), the rear housing portion 186 of the dust collector housing 154 extends below the drive unit housing portion 30 of the power tool 14 ( Figure 2A The front housing portion 190 of the dust collector housing 154 extends upwardly and forwardly from the rear housing portion 186 of the dust collector 18 so that when the dust collector 18 is coupled to the power tool 14 ( Figure 2A ), the rear wall 190a of the front housing portion 190 of the dust collector housing 154 may abut the front wall 30a ( Figure 2A ). The dust collector housing 154 includes clamshell halves that can be coupled together via fasteners.

[0058] refer to Fig. 8A and Figure 8B , the suction tube 158 includes a first portion 194 and a second portion 198. The suction tube 158 is a telescopic tube so that the first portion 194 can slide relative to the second portion 198. Specifically, the suction tube 158 can be in the extended position ( Fig. 8A ) and retracted position ( Figure 8B ) along an extension direction along the longitudinal axis, in which the extended position, the suction head 162 is positioned farthest from the power tool 14, and in the retracted position, the suction head 162 is positioned closest to the power tool 14. The extension direction extends parallel to the transmission axis A2 and the output axis A3. The first portion 194 of the suction tube 158 includes a first stop 202, and the second portion 198 of the suction tube 158 includes a second stop 206. The first stop 202 is positioned at the rearward end 194a of the first portion 194 of the suction tube 158, and the second stop 206 is positioned at the rearward end 198a of the second portion 198 of the suction tube 158. Reference Fig. 9 , the first stop 202 is configured to slide along a track 210 defined by the dust collector housing 154 as the first portion 194 slides relative to the second portion 198. In the extended position, the first stop 202 is positioned at a forward-most position along the track 210 such that the dust collector housing 154 inhibits further sliding of the first portion 194 in the forward direction. Return to Reference Fig. 8A and Figure 8B In the retracted position, the first stop 202 engages the second stop 206 such that the second stop 206 inhibits further sliding of the first portion 194 in the rearward direction.

[0059] like Figure 1 As shown, the suction head 162 is positioned at the forward end 158a of the suction tube 158. When the dust collector 18 is coupled to the power tool 14, the cutter head 54 can extend through the suction head 162 (e.g., as shown in FIG. Figure 1 ). The suction head 162 includes a clamping mechanism 214, a head tube 218, and a collection shield 222. The clamping mechanism 214 includes a latch 226 that can be rotated to selectively secure the suction head 162 to the forward end 158a of the suction tube 158. The head tube 218 extends from the clamping mechanism 214 to the collection shield 222 and provides a conduit for air to flow between the suction tube 158 and the collection shield 222. The collection shield 222 is substantially frustoconical and includes an opening 230 that enables the tool bit 54 to extend through the suction head 162. During the machining operation, the front end 222a of the collection shield 222 can be pressed against the work surface so that the tool bit 54 ( Figure 1 ) extends through the collection shield 222 and into the work surface to contain dust and debris generated during drilling and / or hammering operations within the collection shield 222.

[0060] refer to Figure 7 and Fig.11 , the dust box 166 is pivotally connected to the dust collector housing 154. Specifically, the dust box 166 includes a tongue portion 246 with a hinge portion 248, which allows the dust box 166 to rotate relative to the dust collector housing 154. The dust box 166 can be pivoted between an open position and a closed position. When in the open position, the dust box 166 is released from the dust collector housing 154. When in the closed position, the dust box 166 is coupled to the dust collector housing 154. It should be understood that the hinge portion 248 of the dust box 166 remains connected to the dust collector housing 154 in both the open position and the closed position. Only the main part of the dust box 166 is released and coupled to the dust collector housing 164, and then the dust box 166 is pivoted between the closed position and the open position, respectively.

[0061] like Fig.11As shown, the dust box 166 includes coupling mechanisms 234 that engage the dust collector housing 154 to couple the dust box 166 to the dust collector housing 154 when in the closed position. Each of the coupling mechanisms 234 includes a hook 238 formed on a protrusion 242. The hook 238 is configured to engage the dust collector housing 154, and the protrusion 242 is formed on the outer surface of the dust box 166. The protrusion 242 can be biased or pressed to move the hook 238 out of engagement with the dust collector housing 154, thereby removing the dust box 166 from the dust collector housing 154. The dust box 166 further includes a tongue portion 246 that can be inserted into the rear housing portion 186 of the dust collector housing 154 to couple the dust box 166 to the dust collector housing 154. Specifically, the tongue portion 246 forms an interference fit with the dust collector housing 154 for inhibiting the dust box 166 from being removed from the dust collector housing 154 without actuation of the coupling mechanism 234. The tongue portion 246 includes a recess 250 that provides a space for accommodating the latch mechanism 182 when the dust box 166 is coupled to the dust collector housing 154 ( Fig.12 ).

[0062] Continue to refer Figure 7 and Fig.11 The dust box 166 defines a dust storage space 254, a dust box inlet 258, and a dust box outlet 262. The dust storage space 254 is configured to store dust that has been generated during drilling and / or hammering operations and is passed through the fan 78 ( Figure 3 ) caused by the second air flow P2 ( Fig.16 ) is sucked into the dust collector 18. The dust box inlet 258 provides an opening for air flow to enter the dust storage space 254, and the dust box outlet 262 provides an opening for air flow to leave the dust storage space 254. The dust box inlet 258 is oriented so that the air flow is configured to flow through the dust box inlet 258 in a direction extending parallel to the output axis A1 of the power tool 14 ( Figure 3 In other words, the air flow is configured to flow through the dust box inlet 258 in a top-to-bottom direction. The dust box outlet 262 is oriented such that the air flow is configured to flow through the dust box outlet 262 at an oblique angle to the output axis A3 of the power tool 14 ( Figure 3 ). Specifically, the dust box outlet 262 is oriented at a 45 degree angle to the output axis A3. In other words, the dust box outlet 262 is oriented at a 45 degree angle relative to the dust box inlet 258. In other embodiments, the dust box outlet 262 can be oriented at any angle between 0 and 90 degrees relative to the dust box inlet 258.

[0063] like Figure 7As shown, when the dust box 166 is connected to the dust collector housing 154, the dust box connecting pipe 170 is positioned in the dust collector housing 154, between the suction pipe 158 and the dust box 166. The dust box connecting pipe 170 has a first end 170a and a second end 170b, and when the dust box 166 is connected to the dust collector housing 154, the first end is connected to the rear end 158b of the suction pipe 158, and the second end can be connected to the dust box inlet 258. The dust box connecting pipe 170 meanders back and forth between the suction pipe and the filter. Specifically, the dust box connecting pipe 170 extends downward from the suction pipe 158, bends in a 90-degree manner, extends toward the forward end 18a of the dust collector 18, and is finally connected to the dust box inlet 258 through another 90-degree turn connector. In other words, the dust box connecting pipe 170 extends substantially parallel to the suction pipe 158, and the dust box connecting pipe 170 overlaps at least a portion of the suction pipe 158. Thus, the dust box connecting pipe 170 provides a conduit for air to flow from the suction pipe 158 to the dust storage space 254 of the dust box 166.

[0064] like Figure 7 and Fig.11 As shown, the filter 174 is at least partially positioned in the dust storage space 254 of the dust box 166 and extends through the dust box outlet 262. In some embodiments, the filter 174 is oriented at an angle to save space within the dust box 166 and make the dust collector more compact. By orienting the filter 174 at an angle, the height of the dust box 166 (i.e., as shown in FIG. Figure 7 For example, the filter 174 may extend or be oriented at an oblique angle relative to the drive axis A1 of the power tool 14 ( Figure 3 The filter 174 may also be arranged relative to the transmission axis A2 and the output axis A3 ( Figure 3) Both extend or are oriented at an oblique angle. Specifically, the filter 174 is oriented at a 45-degree angle relative to each of the drive axis A1, the transmission axis A2, and the output axis A3. The filter 174 can extend at 45 degrees relative to the dust box inlet 258. By arranging the filter 174 at a 45-degree angle relative to the drive axis A1, the transmission axis A2, and the output axis A3, the dust collector 18 can be allowed to be more compact than a conventional dust collector. In other embodiments, the filter 174 can extend at any angle between 0 and 90 degrees relative to the drive axis A1, the transmission axis A2, and the output axis A3. For example, the filter 174 can extend or be oriented at a first angle relative to the drive axis A1 and a second angle relative to the transmission axis A2 and the output axis A3, and the first angle and the second angle can add up to 90 degrees. The filter 174 includes a body 266, a cap 270, a first seal 274, and a second seal 278. In the embodiment shown, the body 266 and the cap 270 are formed integrally together. In other embodiments, the body 266 and the cap 270 are formed separately and can be coupled together. The first seal 274 is positioned on the underside of the cap 270 and faces the dust box outlet 262. The second seal 278 is positioned on the top side of the cap 270 and faces the tool connection tube 178 when the dust box 166 is coupled to the dust collector housing 154. In the illustrated embodiment, the first seal 274 and the second seal 278 are o-rings. In other embodiments, the first seal 274 and the second seal 278 can be another type of sealing member and / or can be different sealing members from each other.

[0065] refer to Figure 7 , a tool connection tube 178 is positioned within the dust collector housing 154, below the suction tube 158, and extends through a rear wall 190a of a front housing portion 190 of the dust collector housing 154. Specifically, a first end 178a of the tool connection tube 178 is connected to the filter 174, and a second end 178b of the tool connection tube 178 is positioned outside the dust collector housing 154. When the dust box 166 is connected to the dust collector housing 154 and the filter 174 is positioned in the dust box outlet 262, the first end 178a of the tool connection tube 178 is configured to compress a first seal 274 between the cap 270 and the dust box outlet 262, and is configured to compress a second seal 278 with the cap 270. As a result, an airtight seal is created that inhibits air from escaping from the filter 174. Reference Figure 7 and Fig.12 , the tool connection tube 178 includes a flange 300 at the second end 178b of the tool connection tube 178. The flange 300 may also be referred to as the outlet of the dust collector 18. In the illustrated embodiment, the flange 300 is positioned outside the dust collector housing 154. The flange 300 is shaped to interface with the suction conduit 106 of the power tool 14 ( Figure 3 Although not shown, flange 300 may include a sealing member, such as an o-ring or a foam insert. Thus, when flange 300 is coupled to suction conduit 106 ( Figure 4A ), the sealing member may be compressed between the flange 300 and the suction conduit 106 ( Figure 4A ) to form an airtight seal between the dust collector 18 and the power tool 14.

[0066] like Fig.12 and Fig.13 As shown, the latch mechanism 182 is housed within the rear housing portion 186 of the dust collector 18 and enables the dust collector 18 to be releasably connected to the power tool 14 ( Figure 1 ). The latch mechanism 182 includes a button 304, one or more cam surfaces 308, a pivotable locking hook or locking member 312, and a spring 314. Figures 13 to 14B , the locking member 312 selectively engages with the narrow groove 316 in the suction conduit 106 of the power tool 14 to releasably connect the dust collector 18 and the power tool 14. The locking member 312 can also be called a latch. When the user presses the button 304, the cam surfaces 308 work together to rotate the locking member 312 between the locked position and the unlocked position. The spring 314 biases the locking member 312 to the locked position. When the dust collector 18 slides toward the power tool 14 to connect the dust collector 18 and the power tool 14 together, the curved surface 320 of the locking member 312 cams against the suction conduit 106 of the power tool 14 to rotate the locking member 312 toward the unlocked position. In other words, the suction conduit 106 overcomes the bias of the spring 314 to push the locking member 312 to move the locking member 312 to the unlocked position. When the locking member 312 reaches the slot 316, the bias of the spring 314 is free (e.g., not inhibited by the suction conduit 106) to rotate the locking member 312 toward the locked position, so that the locking member 312 moves into the slot 316. With the locking member 312 positioned within the slot 316, interference is formed between the dust collector 18 and the power tool 14, which inhibits the dust collector from being removed from the power tool 14. To disconnect the dust collector 18 from the power tool 14, the user can press the button 304 so that the cam surface 308 overcomes the bias of the spring 314 and rotates the locking member 312 toward the unlocked position. This moves the locking member 312 out of the slot 316 and removes the interference between the dust collector 18 and the power tool 14 to allow the dust collector 18 to be disconnected from the power tool 14.

[0067] Return to reference Figure 6 and Figure 7 , the arrangement of the components of the dust collector 18 improves the power tool assembly 10 ( Figure 1) overall compactness. For example, the dust box connection tube 170 effectively winds or meanders from the rear end 18b of the dust collector 18 to the front end 18a of the dust collector 18 to more efficiently utilize the space within the dust collector housing 154. In another example, the filter 174 is oriented at a 45 degree angle relative to the dust box inlet 258 ( Figure 7 ), and therefore requires less space within the dust collector 18, thereby allowing the dust collector 18 to be reduced in size. By increasing the compactness of the dust collector 18, and thus increasing the power tool assembly 10 ( Figure 1 ) compactness, among other advantages, the power tool assembly 10 ( Figure 1 ) can be more easily fitted into a smaller workspace and can be stored more easily.

[0068] Fig.15 The auxiliary handle 22 is shown. The auxiliary handle 22 includes a clamping portion 328 and a gripping portion 332. The clamping portion 328 is configured to engage an outer surface ( Figure 5 ) to couple the auxiliary handle 22 to the power tool 14 ( Figure 2A The grip portion 332 extends from the clamp portion 328 and is configured to be grasped by a user to improve control of the power tool 14. The clamp portion 328 may be adjustable so that the grip portion 332 may be moved to different orientations relative to the power tool 14 ( Figure 2A ).

[0069] refer to Figure 1 and Fig.16 In order to operate the power tool assembly 10, the power tool 14, the dust collector 18 and the auxiliary handle 22 can all be connected together. In some embodiments, the power tool 14 can be operated without the dust collector 18 and the auxiliary handle 22. Specifically, refer to Figures 13 to 14B , the top surface of the rear housing portion 186 of the dust collector 18 can slide along the suction duct 106 in the front-to-back direction until the latch mechanism 182 reaches the slot 316 in the suction duct 106. Until the latch mechanism 182 reaches the slot 316, the bottom surface of the suction duct 106 pushes the locking member 312 against the bias of the spring 314. Once the latch mechanism 182 reaches the slot 316, the locking member 312 can cam against the suction duct 106 and enter the slot 316, so that the suction duct 106 inhibits the locking member 312 from being removed from the slot 316, and thereby inhibits the dust collector 18 from being removed from the power tool 14. Reference Figure 6 , the rear housing portion 186 of the dust collector 18 may include tracks 184 that facilitate relative sliding between the suction duct 106 and the dust collector 18.

[0070] Return to reference Figure 1 and Fig.16, with the dust collector 18 coupled to the power tool 14, the trigger 82 can be actuated to provide a user input to the PCBA 70 to drive the rotation of the motor 74. When the motor 74 drives the rotation of the output shaft 86, the transmission assembly 50 is configured to drive the rotation of the cutter head 54, as described above, and the impact mechanism 58 is configured to apply an impact to the cutter head 54. In addition, the motor 74 drives the rotation of the fan 78 via the output shaft 86. Figure 4B and Fig.16 , the first fan portion 90 causes a first air flow P1, and the second fan portion 94 causes a second air flow P2. The first air flow P1 and the second air flow P2 are pulled toward the fan 78 from opposite directions and then exhausted together through the vent 48. For example, in the illustrated embodiment, the first air flow P1 travels in a first direction (e.g., downward) along an airflow path parallel to the fan's axis of rotation (in this arrangement it is along the drive axis A3). The second air flow P2 travels in a second direction (e.g., upward) along an airflow path parallel to the fan's axis of rotation (i.e., along the drive axis A3).

[0071] The first fan section 90 passes through the air inlet 47 ( Figure 2A ) draws in air and causes the air to flow downward toward the motor 74 to cool the motor 74. In some embodiments, the inner surface of the drive unit housing 30 may optionally include ribs to guide the cooling first air flow P1 into the motor 74. The first fan portion 90 may further draw the cooling air through the PCBA 70 to cool the PCBA 70. Once the first air flow P1 reaches the first fan portion 90, the fan 78 blows the air out of the vent 48 ( Figure 2B ). The second fan section 94 causes the second air flow P2 to draw dust and debris along the flow path into the dust collector 18. Specifically, the second fan section 94 draws the mixture of debris and air (i.e., the dirty air mixture) through the opening 230 in the collection shield 222 (i.e., the first end of the flow path), down the head pipe 218 into the suction pipe 158 and along the suction pipe, through the dust box connecting pipe 170, and into the dust box 166 ( Fig.11 Once the dirty air mixture is in the dust box 166, the dirty air mixture is drawn through the filter 174 and out of the dust box 166 through the dust box outlet 262 ( Fig.11). As the dirty air mixture is drawn through the filter 174, the filter 174 separates dust and debris from the air so that the dust and debris remain in the dust storage space 254, and the air flows through the filter 174 to the tool connection tube 178. Clean air then enters the power tool 14 in the front-to-rear direction by traveling from the tool connection tube 178 and entering the suction inlet 98. Specifically, the clean air can flow through the opening in the flange 300 (i.e., the second end of the flow path) and enter the suction inlet 98. The fan 78 then blows or exhausts the clean air from the power tool 14 through the vent 48 ( Figure 2B ).

[0072] Once the working operation (e.g., drilling and / or hammering) is completed, the dust collector 18 may be removed from the power tool 14 in order to (among other reasons) clean the dust collector 18 and dispose of dust and debris from the dust box 166. Figures 13 to 14B , the button 304 of the latch mechanism 182 can be pressed to remove the dust collector 18. Pressing the button 304 engages the cam surface 308 with the locking member 312 to overcome the bias of the spring 314 and move the locking member 312 out of the slot 316 in the suction duct 106. Once the locking member 312 is removed from the slot 316, the dust collector 18 can be freely removed from the power tool 14. In the case where the dust collector 18 is removed from the power tool 14, the dust box 166 can be removed from the dust collector 18 by actuation of the coupling mechanism 234. Dust and debris can then be emptied from the dust storage space 254. Alternatively, the user can remove the dust box 166 from the dust collector 18 without removing the dust collector from the power tool 14 to remove dust and debris from the dust storage space 254.

[0073] Fig.17 A portion of a power tool assembly 410 according to another embodiment of the present disclosure is shown. The power tool assembly 410 includes at least a power tool 414 and a dust collector 418 detachably connected to the power tool 414. Fig.17 The portion of the power tool assembly 410 shown in FIG. 4 is a cross-section of a power tool 414 and a dust collector 418 at a connection point between the power tool 414 and the dust collector 418. Except as otherwise described herein, the power tool 414 may be used with Figures 2A to 3 The power tool 14 is substantially similar to the power tool 14, and the dust collector 418 can be used with Figure 6 and Figure 7 The dust collector 18 is basically similar.

[0074] like Fig.17 As shown, the power tool 414 includes, among other things, a housing 422, a motor 426, and a suction conduit 430. Fig.17 414 may additionally include a fan (e.g. Figure 4B The fan 78 is configured to be driven by the motor 426 to cause a suction air flow through the suction duct 430. The dust collector 418 includes, in particular, a dust collector housing 434, a suction duct 438, a dust box 442, a dust box connecting pipe 446, a filter 450, and a tool connecting pipe 454. Although not shown in Fig.17 , but the dust collector 418 may in particular additionally include a suction head, such as Figure 7 The suction head 162. Accordingly, Fig.17 The power tool assembly 410 may be substantially similar to Figures 1 to 16 The power tool assembly 10 functions because the motor 426 of the power tool 414 can induce a suction air flow at the suction head for suctioning dust and debris generated during the working operation of the power tool 414.

[0075] Continue to refer Fig.17 , the power tool 414 further includes a seal 458, and the dust collector 418 additionally includes a damper 462. The seal 458 is disposed at the opening of the suction duct 430. In the illustrated embodiment, the seal 458 is a foam seal that can also function as a barrier that inhibits leakage of the suction airflow from the tool connection tube 446 at the connection point between the tool connection tube 446 and the suction duct 430. Specifically, the tool connection tube 446 can include elbows 446a that are configured to engage and compress the seal 458 at the opening of the suction duct 430 when the dust collector 418 is connected to the power tool 414. The damper 462 is disposed in the dust collector housing 434 of the dust collector 418 and can extend from the dust collector housing 434 to engage the housing 422 of the power tool 414. In the illustrated embodiment, the damper 462 is a rubber gasket. The engagement between the rubber gasket secured to the dust collector housing 434 and the housing 422 of the power tool 414 inhibits the power tool 414 and the dust collector 418 from rocking relative to each other during operation of the power tool assembly 410. Thus, the inclusion of the damper 462 can improve the user experience during operation of the power tool assembly 410. Although the seal 458 and the damper 462 are relatively Fig.17 410, but the seal 458 and the damper 462 may also be implemented or included in the Figures 1 to 16 In the power tool assembly 10.

[0076] Although the disclosure 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 disclosure described. Various features of the disclosure are set forth in the appended claims.

Claims

1. A power tool assembly, characterized in that: include: A power tool, comprising: an output chuck configured to receive a tool bit for performing a working operation, the output chuck defining an output axis, a housing defining a suction inlet, a motor disposed within the housing and defining a drive axis, and a fan rotationally driven by the motor, the fan being configured to induce a suction air flow through the suction inlet; and A dust collector is detachably connected to the power tool, and the dust collector includes a tool connecting pipe, which is connected to the suction inlet when the dust collector is connected to the power tool, wherein the suction air flow caused by the fan flows from the dust collector to the power tool in a direction extending parallel to the output axis.

2. The power tool assembly according to claim 1, characterized in that: The output axis is perpendicular to the drive axis.

3. The power tool assembly according to claim 1, characterized in that: The dust collector includes a filter, and wherein the filter is disposed at an oblique angle relative to the output axis and the drive axis.

4. The power tool assembly according to claim 1, characterized in that: The power tool further includes a transmission assembly having an intermediate shaft extending along a transmission axis, and wherein the transmission axis extends parallel to and is positioned below the output axis.

5. The power tool assembly according to claim 1, wherein: One of the power tool and the dust collector includes a latch mechanism having a pivotable latch, and the other of the power tool and the dust collector includes a slot for receiving the latch to couple the power tool and the dust collector together.

6. The power tool assembly according to claim 5, characterized in that: The latch mechanism further includes a spring that biases the latch to the locked position and a button that can be pressed to adjust the latch to the unlocked position.

7. The power tool assembly according to claim 1, characterized in that: The fan includes a first fan portion, which is configured to cause a cooling air flow to enter the housing at an air inlet formed in the housing, and is configured to blow the cooling air flow out of the housing through a vent formed in the housing, and wherein the cooling air flow travels from the air inlet to the vent in a first direction along the drive axis.

8. The power tool assembly according to claim 7, characterized in that: The fan includes a second fan portion configured to cause a suction air flow to enter the housing through the suction inlet and to blow the suction air flow out of the vent, wherein the suction air flow travels from the suction inlet to the vent in a second direction along the drive axis, and wherein the first direction and the second direction are opposite directions.

9. A power tool assembly, characterized in that: include: A power tool, comprising: an output chuck configured to receive a tool bit for performing a working operation, the output chuck defining an output axis, a tool housing including a suction conduit defining a suction inlet, an electric motor disposed within the housing and having an output shaft defining a drive axis, and a fan rotationally driven by the motor, the fan being configured to induce a suction air flow through the suction inlet; and A dust collector removably coupled to the power tool and comprising an outlet configured to engage the suction inlet so that a fan of the power tool induces a suction air flow through the dust collector, the dust collector further comprising A dust collector housing having a front end and a rear end, a tool connection pipe defining an outlet of the dust collector and configured to engage with a suction inlet of the power tool, a portion of the tool connection pipe extending parallel to the output axis and protruding from a wall of the dust collector housing, Wherein, the dust collector is configured to be attached to the tool housing of the power tool by sliding the dust collector in a front-to-rear direction until the tool connecting pipe engages with the suction inlet.

10. The power tool assembly according to claim 9, wherein: The suction inlet includes a barrier, and wherein the outlet engages the barrier when the dust collector is coupled to the power tool such that the barrier inhibits leakage of suction air from the power tool assembly at a connection point between the power tool and the dust collector.

11. The power tool assembly according to claim 9, characterized in that: One of the power tool and the dust collector includes a latch mechanism having a pivotable latch and a spring biasing the pivotable latch to a locked position, and the other of the power tool and the dust collector includes a slot for receiving the latch to couple the power tool and the dust collector together.

12. The power tool assembly according to claim 11, wherein: The attachment of the dust collector to the power tool includes sliding the top surface of the rear housing portion of the dust collector in the front-to-rear direction along the bottom surface of the suction duct so that the bottom surface of the suction duct overcomes the bias of the spring to move the pivotable latch, and wherein, after the pivotable latch reaches the slot during the sliding, the spring biases the pivotable latch into the slot.

13. The power tool assembly according to claim 9, wherein: The dust collector further includes a rubber gasket extending from the dust collector housing to engage a tool housing of the power tool when the power tool and the dust collector are coupled together, the rubber gasket being configured to inhibit relative shaking between the power tool and the dust collector.

14. A dust collector configured to be detachably attached to a power tool, characterized in that: The dust collector includes: case; a dust box pivotally connected to the housing; a suction tube that can slide into and out of the housing along a longitudinal axis extending in a front-to-rear direction; a suction head positioned at a forward end of the suction duct and defining a first end of a flow path such that suction air is configured to flow into the dust collector at the suction head; a tool connection pipe supported in the housing, a portion of which protrudes from a wall of the housing and extends in the front-rear direction in parallel with the suction pipe; an outlet positioned at a rearward end of the tool connection tube and defining a second end of the flow path such that suction air is configured to flow out of the dust collector at the outlet; and A filter is positioned along the flow path between the suction tube and the tool connection tube, the filter being configured to separate dust and debris from the suction air traveling along the flow path, wherein the filter is disposed at an oblique angle relative to the longitudinal axis.

15. The dust collector according to claim 14, characterized in that The suction pipe is configured to extend along an extension direction relative to the housing, and wherein a portion of the tool connection pipe protruding from the wall of the housing extends parallel to the extension direction.

16. The dust collector according to claim 14, characterized in that: The filter is oriented at an angle of 45 degrees relative to the extension direction of the suction tube.

17. The dust collector according to claim 14, characterized in that: The invention further comprises a dust box connecting pipe positioned in the housing between the suction pipe and the dust box, wherein the dust box connecting pipe extends below the suction pipe and parallel to the suction pipe.

18. The dust collector according to claim 17, characterized in that The dust box connecting pipe includes a 90 degree turn at a connection point with the suction pipe and a 90 degree turn at a connection point with the dust box.

19. The dust collector according to claim 17, characterized in that: The dust box supports at least a portion of the filter, and wherein the dust box connecting pipe guides the air flow from the suction pipe into the dust box.

20. The dust collector according to claim 14, characterized in that The outlet is a flange integrally formed with the tool connection tube at the end of the tool connection tube outside the housing.

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