Hand-held power tool and auxiliary handle for hand-held power tool

Abstract

The utility model relates to a handheld power tool and an auxiliary handle for the handheld power tool. The handheld power tool comprises a shell, a power tool body and an auxiliary handle, a tool receiving portion disposed on a first end of the housing and configured to receive a tool accessory; and a motor positioned within the housing and operatively coupled to the tool receptacle to drive the tool accessory. The dust container is selectively coupled to the housing. A dust tube is coupled to the first end of the housing and is in fluid communication with the dust container, where the dust tube is movable between an extended position and a retracted position. A fan is positioned within the housing and operable to create a suction air flow path through the dust tube and into the dust container, where the fan is rotatably driven by a motor.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to U.S. Provisional Patent Application No. 63 / 169,611, filed April 01, 2021, U.S. Provisional Patent Application No. 63 / 211,856, filed June 17, 2021, U.S. Provisional Patent Application No. 63 / 355,475, filed June 24, 2022, and U.S. Non-Provisional Patent Application No. 17 / 711,834, filed April 1, 2022, the entire contents of each of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to power tools, and more particularly to dust collection assemblies for use with power tools. BACKGROUND

[0004] Dust collection assemblies are often used in conjunction with handheld drilling tools, such as rotary hammers, to collect dust and other debris during drilling operations to prevent the dust and other debris from accumulating at the work site. Such dust collection assemblies can be attached to the rotary hammer to position a suction inlet of the collector proximate to a drill bit attached to the rotary hammer. Such dust collection assemblies can also include an on-board dust container in which dust and other debris accumulates. Such dust containers are often removable from the dust collection assembly to facilitate disposal of the accumulated dust and debris. SUMMARY

[0005] The present disclosure provides, in one aspect, a handheld power tool comprising: a housing; a tool receptacle disposed on a first end of the housing and configured to receive a tool accessory; a drive assembly positioned within the housing and configured to drive the tool accessory; a motor positioned within the housing and operably coupled to the drive assembly to drive the drive assembly; a dust container selectively coupled to the housing; a suction tube coupled to the first end of the housing and in fluid communication with the dust container, the suction tube movable between a first position and a second position; and a suction fan positioned within the housing and operable to create an air flow path through the suction tube and into the dust container.

[0006] The present disclosure provides a hand-held power tool comprising a housing, a tool receptacle disposed on a first end of the housing and configured to receive a tool accessory, and a motor positioned within the housing and operably coupled to the tool receptacle to drive the tool accessory. A dust container is selectively coupled to the housing. A dust tube is coupled to the first end of the housing and is in fluid communication with the dust container, wherein the dust tube is movable between an extended position and a retracted position. A fan is positioned within the housing and is operable to create a suction air flow path through the dust tube and into the dust container, wherein the fan is rotatably driven by the motor.

[0007] The present disclosure also provides a hand-held power tool comprising a housing, a tool receptacle disposed on a first end of the housing and configured to receive a tool accessory, a motor positioned within the housing and operably coupled to the tool receptacle to drive the tool accessory, a dust container selectively coupled to the housing, a drill bit over dust tube coupled to the first end of the housing and in fluid communication with the dust container, the drill bit over dust tube movable between an extended position and a retracted position, and a fan positioned within the housing and operable to create an air flow path through the dust tube and into the dust container.

[0008] Further, the present disclosure provides a hand-held power tool comprising a housing, a tool receptacle disposed on a first end of the housing and configured to receive a tool accessory, the tool accessory defining a working axis, a handle extending rearwardly from a second end of the housing, a motor positioned within the housing and operably coupled to the tool receptacle to drive the tool accessory, a dust container selectively coupled to the housing, a dust tube coupled to the first end of the housing and in fluid communication with the dust container, the dust tube movable between an extended position and a retracted position, a dust transfer tube fluidly connecting the dust tube and the dust container, the dust transfer tube extending through at least a portion of the housing, and a fan positioned within the housing and operable to create a suction air flow path through the dust tube and into the dust container.

[0009] Further, the present disclosure provides a housing comprising a front end, a rear end, a first side, and a second side. A tool receptacle is disposed on the front end of the housing, the tool receptacle configured to receive a tool. A motor is positioned within the housing and operatively coupled to the tool receptacle to drive the tool. A handle is disposed on the rear end of the housing. A tube extends through at least a portion of the housing. An auxiliary handle is selectively coupled to the housing and is at least partially insertable into the tube.

[0010] Further, the disclosure provides an auxiliary handle for a hand-held power tool, the auxiliary handle including a tube extending through a portion of the hand-held power tool. A pin housing is insertable into the tube and a handle is supported on an end of the pin housing. A locking mechanism is configured to selectively lock the pin housing relative to the tube. The locking mechanism includes a pin disposed within the pin housing and axially slidable within the pin housing between a locked position and an unlocked position. A ball is disposed within a ball hole in the pin housing. The ball is movable in a radial direction between the locked position and the unlocked position. An actuator is operable to unlock the pin and the ball.

[0011] Further, the disclosure provides a housing including a front end, a rear end, a first side, and a second side. A tool receptacle is disposed on the front end of the housing, the tool receptacle configured to receive a tool. A motor is positioned within the housing and operatively coupled to the tool receptacle to impart rotational motion on the tool receptacle. A handle is disposed on the rear end of the housing. A tube extends through at least a portion of the housing, and an auxiliary handle is insertable into the tube at a first depth corresponding to a retracted position and is insertable into the tube at a second depth corresponding to an extended position. The auxiliary handle is selectively insertable into the tube from the first side of the housing and from the second side of the housing.

[0012] In some embodiments, the tube extends through an entire width of the power tool, and the auxiliary handle is selectively insertable into the tube from the first side of the housing and is selectively insertable into the tube from the second side of the housing.

[0013] In some embodiments, the auxiliary handle is oriented orthogonal to the handle.

[0014] In some embodiments, the auxiliary handle is movable between an extended position and a retracted position.

[0015] In some embodiments, the auxiliary handle is insertable into the tube at a first depth corresponding to the extended position and is insertable into the tube at a second depth corresponding to the retracted position.

[0016] In some embodiments, the auxiliary handle includes a pin housing insertable into the tube, a handle supported on an end of the pin housing, a pin disposed within the pin housing and axially slidable within the pin housing between a locked position and an unlocked position, a ball disposed within a ball hole in the pin housing, the ball movable in a radial direction between the locked position and the unlocked position, and an actuator operable to unlock the pin and the ball.

[0017] In some embodiments, actuation of the actuator enables the pin housing to slide relative to the tube.

[0018] In some embodiments, the power tool further includes a biasing member configured to bias the pin toward the locked position and limit movement of the pin housing relative to the tube.

[0019] In some embodiments, the power tool further includes a dust collection assembly having a suction tube and a fan configured to generate an airflow through the suction tube.

[0020] In some embodiments, the locking mechanism further includes a biasing member configured to automatically bias the pin and the ball toward the locked position.

[0021] In some embodiments, actuation of the actuator overcomes a biasing force of the biasing member to enable movement of the pin housing relative to the tube.

[0022] In some embodiments, the actuator is positioned within a cavity in the handle and the actuator is configured to be depressed when actuated.

[0023] In some embodiments, the pin housing is lockable relative to the tube in a first position corresponding to the extended position and the pin housing is lockable relative to the tube in a second position corresponding to the retracted position.

[0024] In some embodiments, the tube includes a first receiving opening on a first end of the tube corresponding to the extended position and a second receiving opening on a second end of the tube corresponding to the retracted position.

[0025] In some embodiments, the pin housing is insertable into the tube from a right side and wherein the pin housing is selectively removable from the tube and insertable into the tube from a left side.

[0026] In some embodiments, the secondary handle includes a pommel handle.

[0027] In some embodiments, the secondary handle includes a locking mechanism configured to lock the secondary handle relative to the tube.

[0028] In some embodiments, the locking mechanism includes a pin housing, a pin disposed within the pin housing and axially slidable within the pin housing between a locked position and an unlocked position, and an actuator operable to slide the pin between the locked position and the unlocked position.

[0029] In some embodiments, the dust container is substantially received within the housing.

[0030] In some embodiments, the hand-held power tool includes a filter at least partially disposed within the dust container when the dust container is coupled to the housing.

[0031] In some embodiments, the drive assembly, the motor, the suction fan, and the filter are disposed within an upper half of the housing.

[0032] In some embodiments, the central axis of the filter and the rotational axis of the suction fan intersect at an obtuse angle.

[0033] In some embodiments, the dust container is prevented from being coupled to the housing when the filter is not positioned within the housing.

[0034] In some embodiments, the suction fan is driven by a motor. Further, in some embodiments, the suction fan is mounted on a motor output shaft driven by the motor.

[0035] In some embodiments, the hand-held power tool includes a cooling fan driven by the motor and operable to generate a second air flow path through the motor to cool the motor.

[0036] In some embodiments, the suction fan and the cooling fan are coaxial.

[0037] In some embodiments, the cooling fan generates a first air flow path from a cooling air intake positioned rearward of the motor to a cooling air exhaust positioned forward of the motor.

[0038] In some embodiments, the suction fan generates a second air flow path from an end of the suction tube to a suction air exhaust positioned rearward of the motor.

[0039] In some embodiments, the hand-held power tool includes a transfer tube in fluid communication with the suction tube and the dust container to transfer dust from the suction tube to the dust container, wherein the transfer tube includes a bend between 0 degrees and 90 degrees.

[0040] In some embodiments, the dust container is coupled to the transfer tube through a connection port.

[0041] In some embodiments, the hand-held power tool includes a filter cleaning mechanism, wherein the filter cleaning mechanism is operable as an automatic filter cleaning mechanism. Further, in some embodiments, the filter cleaning mechanism is operable as a manual filter cleaning mechanism.

[0042] In some embodiments, the filter cleaning mechanism includes: a striker movable between a first striker position and a second striker position in which the striker is in contact with the filter; a spring biasing the striker to the first striker position; and a solenoid. Activation of the solenoid moves the striker to the second striker position such that the striker impacts the filter.

[0043] In some embodiments, the filter cleaning mechanism further includes an anvil disposed between the striker and the filter. The anvil is rotatable between a first anvil position in which the anvil is spaced apart from the filter and a second anvil position in which the anvil is in contact with the filter. A torsion spring biases the anvil to the first anvil position. Activation of the solenoid moves the striker to the second striker position such that the striker rotates the anvil and the anvil impacts the filter.

[0044] In some embodiments, the dust container includes a latch positioned proximate to the handle section of the housing, the latch being operable by a user when grasping the handle.

[0045] In some embodiments, the hand-held power tool includes a depth stop disposed on the housing.

[0046] In some embodiments, the hand-held power tool includes a collapsible drill bit suction hose.

[0047] In some embodiments, the hand-held power tool includes a single fan for generating both the motor cooling air flow and the suction air flow. The single fan is a bi-axial flow fan with radial exhaust.

[0048] Other features and aspects of the present disclosure will become apparent from consideration of the following BRIEF DESCRIPTION OF DRAWINGS

[0049] Figure 1 is a front perspective view of a rotary hammer including an integrated dust collection assembly according to one embodiment.

[0050] Figure 2 is a rear perspective view of a rotary hammer including an integrated dust collection assembly according to one embodiment.

[0051] Figure 3A is a first cross-sectional view of the rotary hammer of Figure 1

[0052] Figure 3B is a second cross-sectional view of the rotary hammer of Figure 1

[0053] Figure 4 is an enlarged cross-sectional view of the rotary hammer of Figure 3.

[0054] Figure 5 is a schematic illustration of a rotary hammer including an integrated dust collection assembly according to another embodiment.

[0055] Figure 6 is a schematic illustration of a rotary hammer including an integrated dust collection assembly according to yet another embodiment.

[0056] Figure 7 ​​is a schematic illustration of a rotary hammer including an integrated dust collection assembly according to yet another embodiment.

[0057] Figure 8 is a schematic illustration of a rotary hammer including an integrated dust collection assembly according to yet another embodiment.

[0058] Figure 9 is a schematic illustration of a rotary hammer including an integrated dust collection assembly according to yet another embodiment.

[0059] Figure 10 is a schematic illustration of a rotary hammer including an integrated dust collection assembly according to yet another embodiment.

[0060] Figure 11 is a schematic illustration of a rotary hammer including an integrated dust collection assembly according to yet another embodiment.

[0061] Figure 12 is a schematic illustration of a rotary hammer including an integrated dust collection assembly according to yet another embodiment.

[0062] Figure 13 is a schematic illustration of a rotary hammer including an integrated dust collection assembly according to yet another embodiment.

[0063] Figure 14 is a cross-sectional view of a rotary hammer including an integrated dust collection assembly according to yet another embodiment.

[0064] Figure 15 is a side view of a rotary hammer including an integrated dust collection assembly according to yet another embodiment.

[0065] Figure 16 is Figure 15 a side view of a rotary hammer, with portions of the rotary hammer hidden for clarity.

[0066] Figure 17 is Figure 15 a detailed view of a portion of a rotary hammer, showing a motor and a fan.

[0067] Figure 18 is Figure 15 a side view of a rotary hammer, with portions of the rotary hammer hidden for clarity.

[0068] Figure 19 is a first perspective view of a rotary hammer including an integrated dust collection assembly according to yet another embodiment.

[0069] Figure 20 is Figure 19 a second perspective view of the rotary hammer shown.

[0070] Figure 21 is Figure 20 Cross-sectional view of a rotary hammer.

[0071] Figure 22 is a detailed view of the drive unit and dust collection assembly as seen from the first side.

[0072] Figure 23 Here's a detailed view of the drive unit and dust collection assembly from the second side.

[0073] Figure 24 Here is a detailed view of the dust duct.

[0074] Figure 25 A detailed view of a portion of the dust transfer tube.

[0075] Figure 26 Detailed view of the connection between the dust tube and the nose of the rotary hammer.

[0076] Figure 27 is a detailed view of a fan according to one embodiment.

[0077] Figure 28 is a detailed view of a fan and filter cleaning mechanism according to one embodiment.

[0078] Figure 29 is an auxiliary handle according to one embodiment.

[0079] Figure 30 A detailed view of a portion of the assist handle.

[0080] Figure 31 A detailed view of the connection between the auxiliary handle and the rotary hammer.

[0081] Figure 32 is a perspective view of a rotary hammer including an integrated dust collection assembly according to yet another embodiment.

[0082] Figure 33 yes Figure 32 A cross-sectional view of a rotary hammer is shown.

[0083] Figure 34A is a first close-up cross-sectional view of the locking system in a first position.

[0084] Figure 34B It is in the second position Figure 34A A second close-up cross-sectional view of the locking system.

[0085] Figure 35A is a first cross-sectional view of the auxiliary handle in the retracted position.

[0086] Figure 35B is between the retracted and extended positions Figure 35Asecond cross-sectional view of the auxiliary handle of

[0087] Figure 35C is in the extended position Figure 35A third cross-sectional view of the auxiliary handle of

[0088] Figure 36 is another embodiment of a rotary hammer including an integrated dust collection assembly according to yet another embodiment.

[0089] Figure 37 is Figure 36 is a cross-sectional view of the rotary hammer shown.

[0090] Figure 38A is a first cross-sectional view of an alternative embodiment of the auxiliary handle in the retracted position.

[0091] Figure 38B is the auxiliary handle of Figure 38A second cross-sectional view of the auxiliary handle of

[0092] Figure 38C is a third cross-sectional view of the auxiliary handle of Figure 38A

[0093] Figure 39 is a perspective view of a rotary hammer including an auxiliary handle in an operating position.

[0094] Figure 40 is a perspective view of a rotary hammer including an auxiliary handle in a stowed position. Figure 39

[0095] Figure 41A is a perspective view of the lockable hinge of the auxiliary handle of Figure 39

[0096] Figure 41B is a perspective view of the lockable hinge of the auxiliary handle of Figure 39

[0097] Figure 41C is a perspective view of the lockable hinge of the auxiliary handle of Figure 39

[0098] Figure 42 is a side view of an alternative embodiment of the auxiliary handle.

[0099] Figure 43 is a side view of an alternative embodiment of the auxiliary handle.

[0100] Figure 44 is Figure 39 or Figure 42 ​​​​​is a perspective view of a coupling system of an auxiliary handle.

[0101] Figure 45 is a perspective view of an alternative embodiment of a coupling system.

[0102] Figure 46 is a perspective view of an auxiliary handle. Figure 45 is a cross-sectional view of a coupling system.

[0103] Figure 47 is an internal view of a coupling system. Figure 45

[0104] Figure 48 is a perspective view of an alternative embodiment of a coupling system.

[0105] Figure 49 is a cross-sectional view of a coupling system. Figure 48

[0106] is a perspective view of an alternative embodiment of an auxiliary handle. Figure 50A

[0107] is a perspective view of an alternative embodiment of a rear end of a rotary hammer. Figure 50B

[0108] is a perspective view of a dust tube assembly. Figure 51

[0109] is an exploded view of a tube coupler and an external transfer tube. Figure 52

[0110] is a side view of a storage lock assembly in a starting position. Figure 53A

[0111] is a side view of a storage lock assembly with a plurality of radial cams aligned with a plurality of lock slots. Figure 53B

[0112] is a side view of a storage lock assembly in a retracted position. Figure 53C

[0113] is an exploded view of an alternative embodiment of a tube coupler and a transfer tube. Figure 54A

[0114] is a perspective view of a tube coupler and a transfer tube. Figure 54B Figure 54A is an exploded view of an alternative embodiment of a tube coupler and a transfer tube.

[0115] Figure 55A is a perspective view of a tube coupler and a transfer tube.

[0116] Figure 55B Figure 55A is a perspective view of a tube coupler and a transfer tube.

[0117] ​​​ Figure 56A is an exploded view of an alternative embodiment of the tube coupler and transfer tube.

[0118] Figure 56B is Figure 56A is a perspective view of the tube coupler and transfer tube of

[0119] Figure 57A is a perspective view of an alternative embodiment of the tube coupler and transfer tube partially assembled.

[0120] Figure 57B is Figure 57A is a top view of the tube coupler and transfer tube of

[0121] Figure 57C is a perspective view of the tube coupler and transfer tube of Figure 57A

[0122] Figure 58A is a plan view of an alternative embodiment of the tube coupler and transfer tube with the locking feature aligned with the locking recess.

[0123] Figure 58B is Figure 58A is a plan view of the tube coupler and transfer tube of

[0124] Figure 58C is Figure 58A is a plan view of the tube coupler and transfer tube of

[0125] Figure 59 is a perspective view of the depth setting assembly.

[0126] Figure 60 is an exploded view of the adjustable stop.

[0127] Figure 61A is a perspective view of an alternative embodiment of the storage lock mechanism in the unlocked configuration.

[0128] Figure 61B is Figure 61A is a cross-sectional view of the slidable lock of the storage lock assembly of

[0129] Figure 61C is a perspective view of the storage lock assembly of Figure 61A in the locked configuration.

[0130] Figure 62A is a perspective view of an alternative embodiment of the storage lock mechanism in the unlocked configuration.

[0131] Figure 62B is a perspective view of the storage lock assembly of Figure 62A in the locked configuration.​

[0132] Figure 63A is an alternative embodiment of the storage lock mechanism in the unlocked configuration.

[0133] Figure 63B is an alternative embodiment of the storage lock assembly in the locked configuration. Figure 63A

[0134] is an alternative embodiment of the storage lock mechanism in the unlocked configuration. Figure 64A

[0135] is an alternative embodiment of the storage lock assembly in the locked configuration. Figure 64B Figure 64A is an alternative embodiment of the dust tube assembly in the extended configuration.

[0136] Figure 65A is an alternative embodiment of the dust tube assembly in the retracted position.

[0137] Figure 65B Figure 65A is an alternative embodiment of the depth setting assembly.

[0138] Figure 66 is a cross-sectional view of the depth setting assembly.

[0139] Figure 67 is an exploded view of an alternative embodiment of the adjustable stop. Figure 66

[0140] is a cross-sectional view of the dust tube assembly. Figure 68

[0141] Before any embodiments of the disclosure are explained in detail, it is to be understood that the application of the disclosure is not limited to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The disclosure is capable of other embodiments and of being practiced or being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. Figure 69 DETAILED DESCRIPTION

[0142] Before any embodiments of the disclosure are explained in detail, it is to be understood that the application of the disclosure is not limited to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The disclosure is capable of other embodiments and of being practiced or being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. DETAILED DESCRIPTION

[0143] ​​Power tools, such as rotary hammers, generate a significant amount of dust and debris when operating the tool. Accordingly, dust extractors or dust collection systems have been implemented to attempt to capture the dust, rather than allowing the dust to be emitted into the air or inhaled by the user. Existing dust collection systems are often separate tools that can be used in conjunction with the power tool. For example, some dust collection systems are housed within a separate tool housing and can be connected to the housing of the power tool. Other dust collection systems utilize a separate shop vacuum and dust channel to collect the dust. Current dust collection systems can be bulky, awkward, or heavy when connected to the power tool. Likewise, dust collection systems that utilize a separate shop vacuum can limit the mobility and maneuverability of the power tool due to the fact that the power tool is tethered to the shop vacuum. Furthermore, because existing dust collectors are often implemented as standalone tools, the overall tool system can be more expensive because duplicate components can be included in the power tool and the dust collection system. For example, the power tool and the dust collection system can each have their own battery, motor, fan, controller, housing, etc.

[0144] The present disclosure addresses some of these issues, and provides a range of other improvements that can be implemented in one or both of the power tool and / or the dust collection assembly. The present disclosure provides a power tool having an integrated dust collection assembly housed within the power tool. As used in the present disclosure, integration of the dust collection assembly is intended to mean that at least some components of the dust collection assembly are not removable from the power tool and / or are integrated within the same housing as the power tool. While some components of the dust collection assembly, such as the dust tube and / or the dust container, can be removably coupled to the power tool, other components, such as the fan and / or the fan motor, are not intended to be removed from the power tool. Furthermore, integration of the dust collection assembly into the power tool can be such that at least some of these components are utilized in a shared manner between the power tool and the dust collection assembly. However, this need not be the case for all components. Some components of the dust collection assembly can be separate from the power tool or can be duplicated from components in the power tool.

[0145] Integration of the dust collection assembly within the power tool can provide a number of different benefits. For example, integration of the dust collection assembly within the power tool can allow for a reduction in the number of components used for operation of the power tool and the dust collection assembly. This in turn can reduce the overall cost of the system. Furthermore, in some embodiments, the reduction in components can also reduce the overall weight and size of the system. Likewise, in some embodiments, the profile of the tool system is more compact, which can allow the user to more easily maneuver and hold the tool system.

[0146] As will be appreciated by those of ordinary skill in the art, although the present disclosure is described with respect to a rotary hammer, the features described herein can be applied to other hand-held power tools that generate dust when in operation. For example, in some embodiments, the present disclosure can be applied to other types of power tools, such as a drill, a sander, a polisher, a grinder, a cutting tool, or other power tools that generate dust.

[0147] Figure 1 and Figure 2 A power tool, such as a rotary hammer 4, is shown in accordance with one embodiment. The shown rotary hammer 4 includes a dust collection assembly 8 integrated within the tool body. In other embodiments, one or more portions of the dust collection assembly 8 can be implemented as elements separate from the rotary hammer 4 or can be positioned external to the rotary hammer 4. As will be appreciated based on the present disclosure, the integration of the dust collection assembly 8 within the rotary hammer 4 can allow for a reduction in the number of components used for the operation of the rotary hammer 4 and the dust collection assembly 8. For example, in some embodiments, the dust collection assembly 8 and the rotary hammer 4 can share certain components. In some embodiments, this can reduce the overall cost of the system. Similarly, in some embodiments, this can reduce the overall weight and size of the system. Also, in some embodiments, the profile of the tool system is more compact, which can allow for easier manipulation and gripping of the tool system by a user. It should be understood that the various features and embodiments described in the present disclosure can be mixed or interchanged into different combinations of features and embodiments. In other words, the particular combinations of features disclosed herein are not intended to be limiting, but are purely for the purpose of illustration of example embodiments that include various features of the disclosure.

[0148] The rotary hammer 4 includes a housing 12 having a main body 16 and a handle 20 extending rearwardly of the main body 16. The main body 16 includes a first end 24 to which a tool bit 32 can be coupled and a second end 28 from which the handle 20 extends. The tool bit 32 can be received within a chuck assembly 36 formed in the first end 24 of the main body 16. Further, a suction tube 40 is slidably engaged with the first end 24 of the main body 16. As Figure 3A and Figure 3B As shown, the housing 12 can be divided into quadrants defined by an upper half, a lower half, a front half, and a rear half. In the shown embodiment, the upper half begins above the suction tube 40 of the dust collection assembly 8. Further, in the shown embodiment, the front half begins at the first end 24 of the housing 12 and extends to a midpoint between the first end 24 of the main body 16 and a rear end of the handle 20. Accordingly, this provides an upper front quadrant (UFQ), an upper rear quadrant (URQ), a lower front quadrant (LFQ), and a lower rear quadrant (LRQ). However, in other embodiments, the quadrants can be defined by different divisions.

[0149] The drive unit 44 is positioned within the main body 16 of the housing 12. The drive unit 44 includes a motor 48 and a drive assembly 52 that is operably coupled to the motor 48 to receive torque from the motor 48. The motor 48 defines a motor axis Al that is parallel to a working axis A2 of the rotary hammer 4. The working axis A2 of the rotary hammer 4 is defined as an axis that passes through the tool bit 32 and the drive assembly 52. Power to the motor 48 is provided by a battery 56 that can be received within a battery receptacle 60 on the bottom of the handle 20. However, in other embodiments, the battery receptacle 60 can be provided within other portions of the housing 12.

[0150] The cooling fan 64 is operably coupled to the motor 48 and shares a rotational axis with the motor axis Al. The motor 48 thereby drives both the drive assembly 52 and the cooling fan 64. In the illustrated embodiment, the cooling fan 64 is positioned on a front side of the motor 48, between the chuck 36 and the motor 48. In another embodiment, the cooling fan 64 is operably coupled to the motor 48 and positioned below the drive unit 44. As will be described in further detail herein, the cooling fan 64 draws air along an air flow path that extends through the motor 48 to cool the motor 48. More specifically, the cooling fan 64 draws in air via a cooling air intake 68 provided in the housing 12 on a rear side of the motor 48 and discharges the air via a cooling air exhaust 72 provided in the housing 12 on a front side of the motor 48.

[0151] In the illustrated embodiment, the drive unit 44 and the cooling fan 64 are positioned within an upper half of the housing 12. Accordingly, the drive unit 44 and the cooling fan 64 are positioned above the suction tube 40. Further, the drive unit 44 and the cooling fan 64 are positioned within a front half of the housing 12. The arrangement of the drive unit 44 and the cooling fan 64 in the upper front quadrant provides additional space for the dust collection assembly 8. For example, the drive unit 44 does not extend (or only minimally extends) into the upper rear quadrant. Accordingly, there is space between the drive unit 44 and the second end 28 of the main body 16. Likewise, the drive unit 44 does not extend (or only minimally extends) into the lower front quadrant and the lower rear quadrant, leaving sufficient space for the dust collection assembly 8.

[0152] The rotary hammer 4 also includes a dust collection assembly 8. In the illustrated embodiment, the dust collection assembly 8 is integrated within the main body 16 of the rotary hammer 4. However, in other embodiments, one or more portions of the dust collection assembly 8 can be provided within the handle 20 of the rotary hammer 4 or can be positioned external to the housing 12. Reference is made to U.S. Patent No. 9, 1 1 1, 1 10, the disclosure of which is incorporated herein by reference in its entirety. Figures 3A to 3BThe dust collection assembly 8 includes a nozzle 76, a telescopic suction tube 40, a dust container 84, a filter 88, and a suction fan 92. The nozzle 76 is positioned at a first end of the telescopic suction tube 40 and adjacent to the tool bit 32 of the rotary hammer 4, such that the tool bit 32 extends through the nozzle 76. The second end of the telescopic suction tube 40 extends into the housing 12, such that the suction tube 40 extends and retracts from the first end 24 of the body 16.

[0153] The dust container 84 is selectively attachable to the housing 12. The dust container 84 is detachable from the housing 12 of the rotary hammer 4 and can be removed to allow an operator to empty dust and other debris from the dust container 84. A latch 96, operable by a user to selectively decouple the dust container 84 from the housing 12, is positioned on the housing 12 proximate the handle 20. Figure 2 In the embodiment of FIG. 1 , the latch 96 is positioned proximate the bottom edge of the housing 12. In another embodiment, as shown in FIG. Figure 14 As shown, the latch 96 can be positioned on the second end 28 of the housing 12 so that the latch faces the handle 20 and is positioned to be operated by the user when the user grasps the handle 20. In the illustrated embodiment, the latch 96 is positioned opposite a trigger switch 98 that selectively operates the rotary hammer 4. In the illustrated embodiment, the dust container 84 is prevented from being secured to the housing 12 without the filter 88 in place. For example, the filter 88 serves as part of the connection between the dust container 84 and the housing 12. Thus, the dust container 84 is prevented from being coupled to the housing 12 without the filter 88 in place.

[0154] The dust container 84 is substantially received within the main body 16 of the housing 12 when coupled to the rotary hammer 4, such that the dust container does not extend (or only minimally extends) outside of the housing 12 when coupled to the housing 12. However, in other embodiments, the dust container 84 may be only partially received within the housing 12 or may be attached to an exterior portion of the housing 12. In the illustrated embodiment, the dust container 84 extends along the width of the bottom of the main body 16. Furthermore, the dust container 84 extends into the upper rear quadrant and into the space between the drive unit 44 and the second end 28 of the main body 16.

[0155] The dust container 84 includes an inlet 100 for the flow of dust-laden air and an outlet 104 defined by an outlet end of the filter 88. More specifically, the dust container 84 includes opposing side walls 108 and a bottom wall 112 extending between the side walls 108. Further, the dust container 84 includes end walls 116 adjacent each of the side walls 108 and the bottom wall 112. An opening 120 is defined in the first end wall 116 through which the filter 88 is received. The first end wall 116 further includes the inlet 100 for the dust-laden air. A connection port 124 extends through the inlet 100 to direct the dust-laden air from the suction tube 40 into the dust container 84. In some embodiments, the connection port 124 is a DEC 26 connection. The dust container 84 is operable to collect dust and other debris from the workpiece during drilling and / or hammering operations performed by the rotary hammer 4 to maintain the work area of the user substantially free of dust and other debris.

[0156] As mentioned, the dust container 84 extends upward into the housing 12 of the rotary hammer 4 between the motor 48 and the handle 20. The filter 88 is positioned within the dust container 84 in a section of the dust container 84 that extends into the space between the motor 48 and the second end 28 of the main body 16 (i.e., the upper rear quadrant). In other embodiments, the filter 88 can be positioned in other sections of the dust container 84. In some embodiments, the filter 88 is a high efficiency particulate air (“HEPA”) filter positioned between the dust container 84 and the suction fan 92.

[0157] The suction fan 92 is positioned rearward of the motor 48 adjacent the filter 88 to draw in the dust-laden air through the filter 88. The suction fan 92 is mounted directly to the output shaft 94 of the motor 48 and shares a rotational axis with the motor axis Al. However, in some embodiments, the suction fan 92 is operably coupled to the motor 48 via other mechanical means such as a clutch, belt, or power take-off. The motor 48, suction fan 92, and filter 88 are located within the upper half of the housing 12 as shown in FIG. 3. More specifically, the filter 88 is in-line with the suction fan 92, the motor 48, the cooling fan 64, and the drive unit 44. The axis A3 that passes through the center of the filter 88 intersects the rotational axis Al of the suction fan 92 at an obtuse angle. In the illustrated embodiment, the axis A3 that passes through the filter 88 is defined as extending perpendicularly from a surface of the filter 88 that faces the suction fan 92. The oblique orientation of the filter 88 results in a reduction in the overall length of the rotary hammer 4 measured from a rearmost point on the handle 20 of the housing 12 to a forwardmost point on the nozzle 76 of the dust collection assembly 8. The obtuse angle of the filter 88 can improve vertical up operation of the rotary hammer 4. Further, the obtuse angle of the filter 88 can provide an improved sealing surface between the dust container 84 and the filter 88.

[0158] The suction fan 92 creates an airflow when rotated by the motor 48 that creates a vacuum in the suction tube 40 to draw dust and other debris into the dust container 84 and through the filter 88. After the dust is separated from the air via the filter 88, the clean air is exhausted through an exhaust port 128 formed in the housing 12 adjacent the suction fan 92. As shown in Figure 1 the exhaust port 128 is positioned behind the motor 48 and adjacent the suction fan 92.

[0159] With continued reference to Figures 3A to 3B , the suction tube 40 extends longitudinally within the rotary hammer 4 housing in a direction parallel to the working axis A2. The suction tube 40 is configured to move along the same longitudinal axis to adjust the length of the suction tube 40 and the position of the nozzle 76. As the tool bit 32 is inserted into the workpiece, the suction tube 40 is retracted into the housing 12 in a telescoping fashion. An insertion depth stop 132 is included within the rotary hammer housing 12 that limits the extent to which the suction tube 40 can be retracted into the housing 12 and, in turn, limits the extent to which the tool bit 32 can be inserted into the workpiece. The insertion depth stop 132 is movable along the length of the suction tube 40 and selectively secured to limit the extent to which the suction tube 40 can be retracted into the housing 12. An extension stop 136 is also included on the housing 12. The extension stop 136 limits the extent to which the suction tube 40 can be extended out of the housing 12 by selectively securing to the suction tube 40 along the length of the suction tube 40. This feature can be used to adjust the extension length of the suction tube 40 to correspond to the size of the tool bit 32 being used. For example, when a 2 inch tool bit is used, the extension length of the suction tube 40 can be reduced to 2 inches to correspond to the length of the tool bit 32. If the length of the suction tube 40 is not limited, the end of the suction tube 40 can extend well beyond the end of the tool bit 32.

[0160] A transfer tube 140 is coupled to the suction tube 40. The transfer tube 140 is fixed relative to the housing 12 and serves as a connection between the suction tube 40 and the dust container 84. The transfer tube 140 has a bend between 0 and 90 degrees proximate a first end of the dust container 84. A connection port 124 is coupled to the first end of the transfer tube 140 to facilitate connection with the dust container 84. In some embodiments, the connection port 124 can be a DEC 26 port. The bend in the transfer tube 140 and the connection port 124 can provide an improved seal between the transfer tube 140 and the dust container 84. Further, the connection port 124 allows the user to remove the dust container 84 with the goal of emptying the dust container 84 without being exposed to the dust within the dust container 84.

[0161] Referring to Figure 3A and Figure 4The filter cleaning mechanism 148 is disposed within the housing 12 and positioned proximate the forwardmost edge of the filter 88. In other embodiments, the filter cleaning mechanism 148 can be positioned proximate any edge of the filter 88. The filter cleaning mechanism 148 includes an anvil 152 for impacting the filter 88, an impactor 156 for striking the anvil 152, a solenoid 160 for causing the impactor 156 to strike the anvil 152, and a biasing member 164 for biasing the impactor 156. The anvil 152 is positioned proximate the filter 88 and coupled to the housing 12 about an anvil axis A4. The anvil 152 rotates about the anvil axis A4 to move between a first anvil position spaced apart from the filter 88 and a second anvil position in contact with an impact position on the filter 88. The impactor 156 has a longitudinal axis A5 parallel to the working axis A2 of the rotary hammer 4 along which the impactor 156 moves between a first impactor position and a second impactor position. In the first impactor position, the impactor 156 is in contact with the anvil 152 in the first anvil position. In other embodiments, the impactor 156 can be spaced apart from the anvil 152 in the first impactor position. In the second impactor position, the impactor 156 is in contact with the anvil 152 such that the anvil 152 rotates to the second anvil position and contacts the filter 88 in the impact position. In some embodiments, the filter cleaning mechanism 148 does not include the anvil 152. Instead, the impactor 156 directly impacts the filter 88 when in the second impactor position. The solenoid 160 is supported by the housing 12 and surrounds at least a portion of the impactor 156. The biasing member 164 is positioned on an opposite end of the impactor 156 and solenoid 160 relative to the anvil 152 and filter 88. In the illustrated embodiment, the biasing member 164 is a compression spring. The biasing member 164 biases the impactor 156 toward the first impactor position until the solenoid 160 is activated, at which point the solenoid 160 overcomes the biasing member 164 causing the impactor 156 to move to the second impactor position. In Figure 14 embodiments, a second biasing member 166, illustrated as a torsion spring, is coupled to the anvil 152 to bias the anvil 152 to the first anvil position.

[0162] The filter cleaning mechanism 148 operates as follows. In one embodiment, the filter cleaning mechanism 148 is automatically actuated when the suction fan 92 is not operating. A controller (not shown) controls activation of the solenoid 160 to move the striker 156. Triggering of the solenoid 160 can be based on detecting that the suction fan 92 is not operating or that the motor 48 is not operating. As used herein, the suction fan 92 can be considered not operating when the suction fan 92 has stopped rotating, or when the suction fan 92 is rotating at a speed that is below a predetermined threshold when the air flow caused by the suction fan 92 has effectively stopped. Similarly, the motor 48 can be considered not operating when the motor has stopped rotating, or when the motor is operating at a speed that is below a predetermined speed threshold. In another embodiment, the filter cleaning mechanism 148 can be actuated when the suction fan 92 or the motor 48 is operating. In the illustrated embodiment, an actuator, such as a button 168, is provided on the exterior of the housing 12 and allows the user to manually initiate the filter cleaning mechanism 148 Figure 1 The button 168 allows the operator to clean the filter 88 at will or at intermediate times between automatic cleaning operations.

[0163] In the rest state, the anvil 152 is in the first anvil position, the striker 156 is in the first striker position, and the solenoid 160 is not energized. To initiate the operating state, the solenoid 160 must be energized either automatically or by the button 168. The solenoid 160 once energized overcomes the biasing member 164, moving the striker 156 from the first striker position to the second striker position. The striker 156 once in the second striker position strikes the anvil 152, moving the anvil 152 from the first anvil position to the second anvil position and impacting the filter 88 in the impact position. The impact of the anvil 152 on the filter 88 dislodges dust and other debris from the filter 88. After the anvil 152 impacts the filter 88, the solenoid 160 is automatically de-energized, allowing the anvil 152 and the striker 156 to return to the first anvil position and the first striker position, respectively.

[0164] Figures 1 to 4The rotary hammer 4 of the illustrated embodiment operates the drive assembly 52 and the dust collection assembly 8 with a single power source (e.g., battery 56) and a single electric motor 48. The portion of the dust collection assembly 8 that is integrated with the housing 12 can allow for an improved component layout for vertical up operation. Two different air flow paths are designated within the housing 12. The first air flow path is the dust collector flow path, where the dust laden air enters through the suction air inlet in the nozzle 76, travels through the suction tube 40, enters into the transfer tube 140, and deposits the dust into the dust container 84 with the help of the filter 88. After passing through the dust container 84 and the filter 88, the now clean air exits the housing 12 through the suction air exhaust 128. The air flow in the dust collector flow path is driven by the suction fan 92 and the motor 48. The second air flow path is characterized as the cooling air flow path. The cooling air flow path includes the cooling air intake 68 on the housing 12 and the cooling air exhaust 72 on the housing 12 spaced apart from the cooling air intake 68. The air in the cooling air flow path enters through the cooling air intake 68, is directed over the motor 48 to cool the motor 48, and exits through the cooling air exhaust 72. The cooling air path is powered by the cooling fan 64, which is mounted coaxially with the suction fan 92 on the motor 48.

[0165] Figure 5 Another embodiment of a rotary hammer 4b is shown with an integrated dust collection assembly 8b, where like components have like reference numbers plus the letter "b" and the following differences explained below. The housing 12b is designed to be coupled to a dust container 84b. Figure 5 In the illustrated embodiment, the motor axis Alb of the embodiment is perpendicular to the drive assembly 52b and the working axis A2b. The dust container 84b is selectively coupled to the housing 12b on a lower front portion below the drive assembly 52b. The orientation of the present embodiment can improve vertical down operation and enable a length reduced rotary hammer 4b.

[0166] Figure 6 Yet another embodiment of a rotary hammer 4c is shown with an integrated dust collection assembly 8c, where like components have like reference numbers plus the letter "c" and the following differences explained below. The housing 12c includes a lower housing portion designed to interface with a dust container 84c. A single fan 172 driven by the motor 48c provides suction for both the dust collector air flow and the cooling air flow. The rotary hammer 4c of the present embodiment can improve horizontal drilling. Advantageously, the embodiment has only a single fan 172 for cooling the motor and driving the dust extractor.

[0167] Figure 7Yet another embodiment of a rotary hammer 4d is shown having an integrated dust collection assembly 8d, where like parts have like reference characters plus the letter "d" and the following differences explained below. A single fan 172d is axially positioned within the housing 12d between the motor 48d and the drive assembly 52d to provide suction for both the dust collector air flow and the cooling air flow. The arrangement of the dust collection assembly 8d components (i.e., filter 88d, dust container 84d, transfer tube 140d, suction tube 40d, and nozzle 76d) remains the same as the embodiment of Figures 1 to 4 This orientation results in the rotary hammer 4d having improved vertical up operation.

[0168] Figure 8 Yet another embodiment of a rotary hammer 4e is shown having an integrated dust collection assembly 8e, where like parts have like reference characters plus the letter "e" and the following differences explained below. A second transfer tube 176 is positioned between the filter 88e and the suction tube 40e. In addition, the filter axis A3e is oriented perpendicular to the motor axis Al e. This housing 12e orientation results in a tool height reduction and a tool length increase. The tool orientation of this embodiment can improve horizontal operation.

[0169] Figure 9 Yet another embodiment of a rotary hammer 4f is shown having an integrated dust collection assembly 8f, where like parts have like reference characters plus the letter "f" and the following differences explained below. The suction tube 40f is positioned horizontally alongside the drive assembly 52f. This results in a tool height that is shorter and optimizes horizontal drilling.

[0170] Figure 10 Yet another embodiment of a rotary hammer 4g is shown having an integrated dust collection assembly 8g, where like parts have like reference characters plus the letter "g" and the following differences explained below. The suction fan 92g is positioned on a suction fan drive shaft 180, separate from the motor 48g. The suction fan drive shaft 180 is parallel to the motor axis Al g. A belt or chain 184 couples the suction fan drive shaft 180 to the motor 48g and allows the motor 48g to drive the suction fan 92g. Advantageously, the suction drive of this embodiment allows the motor 48g and the suction fan 92g to have different rotational speeds.

[0171] Figure 11 Yet another embodiment of a rotary hammer 4h is shown having an integrated dust collection assembly 8h, where like parts have like reference characters plus the letter "h" and the following differences explained below. The suction fan 92h is oriented perpendicular to the motor axis Al h and is driven through a bevel gear train 188.

[0172] Figure 12Yet another embodiment of a rotary hammer 4i having an integrated dust collection assembly 8i is shown, wherein like parts have like reference numerals plus the letter "i" with the following differences explained below. The orientation of the dust collection assembly 8i is similar to Figure 6 however, the suction fan 92i is oriented perpendicular to the motor axis A1i and is driven by a bevel gear train 188i.

[0173] Figure 13 Another embodiment of a rotary hammer 4j with an integrated dust collection assembly 8j is shown, with similar components bearing similar reference numerals plus the letter "j" and the following differences explained below. A second motor 192 is disposed within the housing 12j to drive the suction fan 92j of the dust collection assembly 8j. Advantageously, this embodiment allows for independent control of the speed of the dust collection assembly 8j and the speed of the drive assembly 52j. In this embodiment, the dust collection assembly 8j is operable even when the drive assembly 52j is not engaged.

[0174] Figures 15 to 18 Yet another embodiment of a rotary hammer 4k with an integrated dust collection assembly 8k is shown, wherein like components have like reference numerals plus the letter "k" with the following differences explained below. Figure 15 The rotary hammer 4k includes a housing 12k having a main body 16k and a handle 20k extending rearward of the main body 16k. Figure 16 , the motor 48k, the drive assembly 52k and the fan 200 are arranged in the main body 16k. Each of the drive assembly 52k and the fan 200 is operably connected to the motor 48k to receive the torque from the motor 48k. The motor 48k is oriented in the main body 16k to be non-parallel to the working axis A2 of the rotary hammer 4k. In particular, the motor 48k is oriented so that the motor axis A1 defined as the rotation axis of the motor 48k is transverse to the working axis A2 of the rotary hammer 4k. In some embodiments, the motor 48k can be oriented so that the motor axis A1 is vertically oriented and perpendicular to the working axis A2. The main body 16k of the rotary hammer 4k supports the dust container 84k at the lower half so that the motor 48k, the fan 200 and the dust container 84k are aligned along the motor axis A1, wherein the fan 200 is arranged between the motor 48k and the dust container 84k.

[0175] refer to Figure 17 The fan 200 is a dual-axis fan. The torque from the motor 48k rotates the fan 200, and the fan rotation draws air toward the fan 200. In the embodiment shown, air enters the fan 200 from two opposite directions along the rotation axis A1 of the fan 200, as shown in FIG. Figure 17The first air flow enters the fan 200 from the top side of the fan 200, while the second air flow enters the fan 200 from the bottom side of the fan 200. Once the air reaches the fan 200, the air is directed radially outward from the fan 200 to be exhausted. In particular, the fan 200 draws cooling air into the rotary hammer 4K through an opening in the housing of the rotary hammer 4K. The cooling air flow is then drawn past the motor 48K to cool the motor 48K. The fan 200 can further draw cooling air through the controller 205 to cool the controller 205. After passing through one or both of the motor 48K and the controller 205, the cooling air flow enters the fan 200 from the top side of the fan 200.

[0176] The fan 200 also creates a suction air flow, where air is directed toward the fan 200 in the opposite direction of the cooling air flow through the dust collection assembly 8K, after which it is directed radially out of the exhaust 204. Rotation of the fan 200 simultaneously creates both the motor cooling air flow and the suction air flow. In some embodiments, the cooling air flow and the dust extraction air flow can be two separate air flows that are isolated from one another until they merge within the fan 200 and are exhausted together as a merged air flow. In some embodiments, the cooling air flow is directed past other components of the rotary hammer 4K (e.g., circuit boards) to cool those components as well. As will be described in greater detail later, the suction air flow draws dust and / or debris into the dust container.

[0177] Referring to Figures 15 to 18 , the dust collection assembly 8K includes a collapsible suction tube 208 in place of the telescoping suction tube 40. The collapsible suction tube 208 is configured to selectively couple to the housing 12K of the rotary hammer 4K and surround the tool bit 32K. In other words, the dust collection assembly 8K utilizes an over-the-bit suction tube 208. In the illustrated embodiment, the collapsible suction tube 208 is secured to the housing 12K via a snap fit. However, one of ordinary skill in the art will understand other securing methods, such as a threaded connection or a latching connection, that perform the same function as a snap fit and can be used in place of a snap fit. Referring to Figure 19 , the collapsible suction tube 208 includes a biasing member 212, shown as a spring, that is configured to bias the suction tube 208 to an extended state. When the tool bit 32K is inserted into a workpiece, a front end 216 of the suction tube 208 will engage the workpiece. Further insertion of the tool bit 32K into the workpiece causes the suction tube 208 to collapse or fold against the force of the spring 212 while the front end 216 maintains contact with the workpiece. The entirety of the collapsible suction tube 208 remains outside of the housing 12K of the rotary hammer 4K even when collapsed, thereby creating more space for other components of the rotary hammer 4K within the housing 12K without increasing the overall size of the housing 12K.

[0178] In some embodiments, the retractable suction tube 208 further includes a locking mechanism 220, shown as a hook, to selectively secure the retractable suction tube 208 in the retracted state. When retracted, the hook 220 engages a corresponding lock on the housing 12k to counteract the force from the biasing spring 212. Securing the suction tube 208 in the retracted state allows the tool bit 32k to be easily replaced without removing the retractable suction tube 208 from the housing 12k.

[0179] When the retractable suction tube 208 is secured to the housing 12 k, an uninterrupted fluid path is formed between the opening in the front end 216 of the suction tube 208 and the fan 200. Thus, the suction air flow draws dust and / or debris generated by the tool bit 32 k through the retractable suction tube 208 into the dust receptacle 84 k, whereupon the air combines with the motor cooling air flow to be exhausted through the exhaust port 204.

[0180] Figures 19 to 21 Another embodiment of a power tool according to the present disclosure is shown, such as a rotary hammer 1004. The rotary hammer 1004 shown includes a dust collection assembly 1008 integrated within the tool body. In some embodiments, one or more portions of the dust collection assembly 1008 can be implemented as separate components from the rotary hammer 1004 or can be located external to the rotary hammer 1004.

[0181] The rotary hammer 1004 includes a housing 1012 having a body 1016 and a handle 1020 extending rearwardly of the body 1016. The body 1016 includes a first end 1024 to which a tool attachment may be coupled and a second end 1028 from which the handle 1020 extends. The tool attachment may be, for example, a tool bit 1032, a polisher, a sander, a grinder, a cutter, or any other attachment intended to operate on a work surface that may result in the emission of dust during machining operations of the rotary hammer 1004. The tool bit 1032 may be received within a chuck assembly 1036 formed in the first end 1024 of the body 1016. The tool bit 1032 defines a working axis A2 ( Figure 21 The handle 1020 includes a trigger 1098 adapted to actuate the rotary hammer 1004. In the illustrated embodiment, the trigger 1098 is disposed on the handle 1020 near the operating axis A2 of the rotary hammer 1004. In other words, the trigger 1098 is positioned near or along the operating axis A2 of the rotary hammer 1004 in the vertical position of the handle 1020 (i.e., in the vertical direction as shown). This allows the trigger 1098 to be generally aligned with the tool bit 1032, thereby allowing the user's finger to be aligned with the tool bit 1032.

[0182] In some embodiments, the rotary hammer 1004 can be equipped with an auxiliary handle 1300 that is selectively coupled to the rear of the handle 1020. The auxiliary handle 1300 can assist the user in controlling the rotary hammer 1004, particularly when the user is engaged in overhead drilling or when positioned at an awkward angle relative to the work surface. For example, the auxiliary handle 1300 can be used as an extension arm that allows the user to reach further away while still being able to hold and support the rotary hammer 1004. On the other hand, the auxiliary handle 1300 also allows the user to hold the rotary hammer 1004 closer to the user's body so that the user does not have to extend his / her arms as far. Holding the rotary hammer 1004 closer to the user's body provides more reliable and stable support of the rotary hammer 1004. Moreover, like the trigger 1098, the auxiliary handle 1300 is generally aligned along the working axis A2 of the rotary hammer 1004. This arrangement provides better sighting and control of the working axis A2 from one end of the rotary hammer 1004 all the way to the other end. In other words, the user has greater control and stability over the orientation of the working axis A2 and can more easily adjust and / or maintain the angle of the working axis A2 relative to the work surface.

[0183] Figures 29 to 31 A detailed view of the auxiliary handle 1300 is provided. The auxiliary handle 1300 includes a curved grip 1330 that allows the user to grasp the grip 1330 in the user's palm and hold the user's fingers toward the front of the grip. This style of grip allows the user to hold the auxiliary handle 1300 directly from the rear when engaged in overhead drilling to help support the weight of the rotary hammer 1004. Moreover, because the user can hold the curved grip 1330 directly from the rear, it is also easier to maneuver the rotary hammer without twisting or wrenching their wrist. The illustrated auxiliary handle 1300 includes a telescoping body having a first shaft 1308 and a second shaft 1312 that is slidable within the first shaft 1308. Accordingly, the telescoping body allows the auxiliary handle 1300 to extend to different lengths. For example, Figure 19 The auxiliary handle 1300 is illustrated in the fully extended state, while Figure 20 The auxiliary handle 1300 is illustrated in the retracted state. However, the auxiliary handle 1300 can extend to a plurality of different lengths between the fully extended state and the retracted state. Specifically, the first shaft 1308 and the second shaft 1312 include fixation holes 1316 that, when aligned, allow a fixation pin 1320 to secure the second shaft 1312 relative to the first shaft 1308. This helps maintain the auxiliary handle 1300 at a desired length.

[0184] Further, the auxiliary handle 1300 can be rotated into a stowed position when not in use. For example, the auxiliary handle 1300 can be rotated towards the top of the rotary hammer 1004 (counterclockwise in Figure 19 the illustrated embodiment) and stowed along the top surface of the main body 1016. Alternatively, the auxiliary handle can be rotated towards the rear end of the handle 1020 (clockwise in Figure 19 the illustrated embodiment) and stowed along the length of the handle. This can be accomplished by a rotation lock 1324 that selectively couples the auxiliary handle 1300 to the rotary hammer 1004 in various orientations. Specifically, the rotation lock 1324 both releasably couples the auxiliary handle 1300 to the rear end of the rotary hammer 1004 and maintains the auxiliary handle 1300 in different orientations relative to the rotary hammer 1004. The rotation lock 1324 can include a hinge that allows the auxiliary handle 1300 to rotate relative to the rotary hammer 1004. Further, the auxiliary handle 1300 can be completely removed from the rotary hammer 1004.

[0185] Referring to Figure 21 , the housing 1012 can be divided into quadrants defined by upper, lower, front, and rear halves. In the illustrated embodiment, the upper half begins proximate the electric motor 1048. Further, in the illustrated embodiment, the front half begins at the first end 1024 of the housing 1012 and extends to a midpoint between the first end 1024 of the main body 1016 and the rear end of the handle 1020. Accordingly, this provides an upper front quadrant (UFQ), an upper rear quadrant (URQ), a lower front quadrant (LFQ), and a lower rear quadrant (LRQ). In the illustrated embodiment, the center of mass CM of the tool is positioned proximate the intersection of the upper front quadrant (UFQ), the upper rear quadrant (URQ), the lower front quadrant (LFQ), and the lower rear quadrant (LRQ).

[0186] Referring to Figures 21 to 23The drive unit 1044 is positioned within the main body 1016 of the housing 1012. However, in other embodiments, one or more components of the drive unit 1044 can be positioned in the handle 1020. In the illustrated embodiment, the drive unit 1044 is primarily positioned within the upper half of the housing 1012. The arrangement of the drive unit 1044 provides additional space for the dust collection assembly 1008. The drive unit 1044 includes a motor 1048 and a drive assembly 1052 that is operably coupled to the motor 1048 to receive torque from the motor 1048. The motor 1048 defines a motor axis Al that is angled relative to a working axis A2 of the rotary hammer 1004. For example, in some embodiments, the included angle between the motor axis Al and the working axis A2 is between 80 degrees and 135 degrees. In some embodiments, the included angle between the motor axis Al and the working axis A2 is between 90 degrees and 115 degrees. In some embodiments, the angle is 105 degrees. In other embodiments, the angle is 90 degrees such that the motor axis Al extends perpendicular to the working axis A2. The working axis A2 of the rotary hammer 1004 is defined as the axis that passes through the tool bit 1032 and the drive assembly 1052. In the illustrated embodiment, the motor 1048 is positioned proximate to the center of mass CM. In some embodiments, the motor 1048 is positioned in the front half, near the centerline between the upper half and the lower half of the housing 1012.

[0187] Power for the motor 1048 is provided by a battery 1056 that can be received within a battery receptacle 1060 at the bottom of the handle 1020. In other embodiments, the battery receptacle 1060 can be provided within other portions of the housing 1012. In some embodiments, the battery 1056 can be a removable rechargeable battery.

[0188] Operation of the rotary hammer 1004 is controlled by a single controller 1205. The illustrated controller 1205 controls both the motor 1048 as well as the dust collection assembly 1008. However, in other embodiments, two or more controllers can be included in the rotary hammer 1004 to independently control various components of the drive unit 1044 and the dust collection assembly 1008. The controller 1205 is positioned in the upper rear quadrant (URQ). In particular, the controller 1205 is positioned behind the drive assembly 1052 and above the motor 1048.

[0189] Fan 1200 is operably coupled to motor 1048 and shares a rotational axis with motor axis A1. Motor 1048 thereby drives both drive assembly 1052 and fan 1200. In the illustrated embodiment, fan 1200 is positioned below motor 1048 and drive assembly 1052. Therefore, in the illustrated embodiment, fan 1200 is positioned below the center of mass of rotary hammer 1004. As will be described in further detail herein, fan 1200 draws air along a cooling air flow path extending through motor 1048 to cool motor 1048. In some embodiments, the cooling air flow path is directed past other components of rotary hammer 1004 (e.g., controller 1205, circuit boards) to cool these components as well. Simultaneously, fan 1200 draws air along the suction air flow path to draw dust and / or debris into dust collection assembly 1008. However, in other embodiments, two separate fans may be present to generate the cooling air flow and the dust collection air flow.

[0190] The rotary hammer 1004 also includes a dust collection assembly 1008. In the illustrated embodiment, the dust collection assembly 1008 is integrated within the body 1016 of the rotary hammer 1004. However, in other embodiments, one or more portions of the dust collection assembly 1008 can be located within the handle 1020 or outside of the housing 1012. The dust collection assembly 1008 includes a nozzle 1076, a dust tube 1040, a dust container 1084, a filter 1088, and a fan 1200.

[0191] like Figure 24 As shown, nozzle 1076 is positioned at first end 1040a of dust tube 1040. Nozzle 1076 and dust tube 1040 surround at least a portion of the tool bit 1032 of rotary hammer 1004. In other words, dust collection assembly 1008 utilizes dust tube 1040 on the drill bit. Furthermore, in the illustrated embodiment, dust tube 1040 is a collapsible dust tube. In other words, dust tube 1040 is constructed from a compressible material that can expand and contract in an accordion-like manner. A spring, such as spring 212, biases dust tube 1040 toward an expanded position. When tool bit 1032 is inserted into a workpiece, nozzle 1076 engages the workpiece. Further insertion of tool bit 1032 into the workpiece causes dust tube 1040 to contract or collapse against the force of spring 212, while nozzle 1076 maintains contact with the workpiece.

[0192] In some embodiments, a depth stop 1130 is coupled to the dust tube 1040 to limit the extent to which the tool bit 1032 can be inserted into the workpiece. The depth stop 1130 includes an insertion depth stop 1132, which limits the extent to which the dust tube 1040 can be retracted, and thus the extent to which the tool bit 1032 can be inserted into the workpiece. The insertion depth stop 1132 is movable along the length of a ruler 1134 coupled to the dust tube 1040 and selectively fixed to limit the extent to which the dust tube 1040 can be retracted. The depth stop 1130 also includes an extension stop 1136. The extension stop 1136, by selectively fixing to the ruler 1134, limits the extent to which the dust tube 1040 can be extended. This feature can be used to adjust the extension length of the dust tube 1040 to correspond to the size of the tool bit 1032 being used. Furthermore, in some embodiments, the dust tube 1040 may not include a depth stop 1130 or may include only one of an insertion depth stop 1132 or an extension stop 1136 .

[0193] Furthermore, in some embodiments, the dust tube 1040 may also be equipped with a locking mechanism 220 as shown in the previous embodiment to maintain the dust tube 1040 in a retracted state. However, in other embodiments, the dust tube 1040 may be a sliding dust tube or a telescopic dust tube (e.g., Figure 3A and Figure 3B 1032 ). In addition, in other embodiments, the dust tube 1040 can be arranged adjacent to the tool bit 1032 rather than being configured as an on-bit dust tube 1040. For example, the dust tube 1040 can be arranged above, below, or to the side of the tool bit 1032, with only the nozzle 1076 extending through the tool bit 1032.

[0194] Continue to refer Figure 24 , a first end of the dust tube 1040 is coupled to the nozzle 1076, and a second end 1040b of the dust tube 1040 is coupled to the housing 1012 of the rotary hammer 1004. In the illustrated embodiment, the second end 1040b of the dust tube 1040 is coupled to the housing 1012 via an external transfer tube 1140. The dust tube 1040 is secured to the nozzle 1076 and the external transfer tube 1140 by tabs 1050 that help retain and support the dust tube 1040 at each end. In turn, the external transfer tube 1140 is removably coupled to the housing 1012 via a combination of a snap fit and a swivel connection.

[0195] like Figure 25 As shown, the external transfer tube 1140 is first snap-fitted onto the first end 1024 of the housing 1012 and then rotated (e.g., Figure 25The outer transfer tube 1140 is secured to the housing 1012 in a clockwise rotation (i.e., clockwise rotation) to fix the outer transfer tube 1140 to the housing 1012. Specifically, the first end 1140a of the outer transfer tube 1140 snap fits onto the housing 1012, while the second end 1140b of the outer transfer tube 1140 is rotated into a locked position. The first end 1140a of the outer transfer tube 1140 forms a collar that can snap fit onto the nose 1064 of the rotary hammer 1004 by a clasp 1054. The snap fit is achieved by linearly moving the outer transfer tube 1140 until the clasp 1054 axially locks the first end 1140a of the outer transfer tube 1140 to the housing 1012. The first end 1140a of the outer transfer tube 1140 (i.e., the collar) once secured to the housing 1012 surrounds the circumference of the nose 1064 such that the chuck assembly 1036 and / or the tool bit 1032 extend through an opening in the first end 1140a of the outer transfer tube 1140.

[0196] To rotationally lock the outer transfer tube 1140, the outer transfer tube 1140 is rotated until it reaches a locked position. To achieve this, the first end 1140a of the outer transfer tube 1140 includes one or more annular protrusions 1068 formed within the opening of the collar that are received within corresponding annular grooves 1070 on the nose 1064 of the rotary hammer 1004 to aid in the rotational engagement between the outer transfer tube and the rotary hammer. The outer transfer tube 1140 is rotated until the second end 1140b is received within an annular groove 1062 formed on the first end 1024 of the housing 1012. The annular groove 1062 prevents the outer transfer tube 1140 from further rotating relative to the housing 1012. In addition, the annular groove 1062 aids in aligning the second end 1140b of the outer transfer tube 1140 with an opening in the housing 1012 that intersects with the inner transfer tube 1141. The outer transfer tube 1140 and the inner transfer tube 1141 together direct the dust-laden air from the dust tube 1040 into the dust container 1084. The second end 1140b of the outer transfer tube 1140 is fluidly coupled to the inner transfer tube 1141 so as to form an air-tight connection. It should be understood by one of ordinary skill in the art that in the alternative, other securing methods that perform the same function as the snap fit and rotational connection can be used, such as a threaded or latching connection.

[0197] As Figure 26As shown, the rotary hammer 1004 includes a brush seal 1224 disposed within the dust tube 1040 to prevent dust from entering the main body 1016 via the chuck assembly 1036. In the illustrated embodiment, the brush seal 1224 is positioned proximate to the second end 1040b of the dust tube 1040 that is connected to the housing 1012. However, in other embodiments, the brush seal 1224 can be disposed within the drill bit retention area of the housing 1012, rather than within the dust tube 1040. In yet another embodiment, the brush seal 1224 can be disposed proximate to the first end 1040a of the dust tube 1040. The illustrated brush seal 1224 surrounds and engages a portion of the tool bit 1032 to prevent dust and / or debris that is drawn into the dust tube 1040 from entering the housing 1012. The brush seal 1224 prevents dust that is transferred via the dust extractor air flow from entering through the nose 1064 of the tool and / or the bit retention assembly 1036. Instead, the air will flow through the dust tube 1040, through the outer transfer tube 1140, through the inner transfer tube 1141, and into the dust container 1084, without entering the chamber of the main body 1016 that houses the drive unit 1044 and the controller 1205.

[0198] Referring again to Figures 21 to 23 The outer transfer tube 1140 extends from the dust tube 1040 to the housing 1012, and the inner transfer tube 1141 extends from the outer transfer tube 1140 to the inlet 1100 of the dust container 1084. Together, the outer transfer tube 1140 and the inner transfer tube 1141 form a dust transfer tube 1145. As discussed, the outer transfer tube 1140 is selectively coupled to the dust tube 1040 and the nose 1064 of the rotary hammer 1004 to establish the suction air flow path for the dust extractor. The inner transfer tube 1141 extends from the upper portion to the lower portion along the first end 1024 of the main body 1016, at which point the inner transfer tube is coupled to the inlet 1100 of the dust container 1084.

[0199] A dust container 1084 is selectively attachable to the housing 1012. The dust container 1084 is detachable from the housing 1012 of the rotary hammer 1004 and can be removed to allow an operator to empty dust or other debris from the dust container 1084. In the illustrated embodiment, the dust container 1084 is prevented from being secured to the housing 1012 without the filter 1088 in place. For example, the filter 1088 acts as part of the connection between the dust container 1084 and the housing 1012. As such, the dust container 1084 is prevented from being coupled to the housing 1012 without the filter 1088 in place. The filter 1088 is connected to the underside of the fan 1200. In particular, the filter 1088 is connected to a shroud 1072 of the fan 1200 that extends around the circumference of the fan 1200 and is positioned below the fan 1200. Both the fan 1200 and the filter 1088 are positioned in the lower portion of the main body 1016, below the center of mass (CM).

[0200] The dust container 1084 includes an inlet 1100 for the flow of dusty air and an outlet 1104 defined by an outlet end of the filter 1088. More specifically, the dust container 1084 includes opposing side walls 1108 and a bottom wall 1112 extending between the side walls 1108. Further, the dust container 1084 includes an end wall 1116 adjacent each of the side walls 1108 and the bottom wall 1112. An opening 1120 is defined in a top wall 1118 through which the filter 1088 is received. The top wall 1118 further includes the inlet 1100 for the dusty air. A connection port 1124 extends through the inlet 1100 to direct the dusty air from the dust tube 1040 into the dust container 1084. In some embodiments, the connection port 1124 is a DEC 26 connection. The dust container 1084 is operable to collect dust and other debris from a workpiece during drilling and / or hammering operations performed by the rotary hammer 1004 to maintain a work area of a user substantially free of dust and other debris.

[0201] As previously mentioned, the fan 1200 creates both a suction air flow path (AF1) and a cooling air flow path (AF2). The fan 1200 is a dual shaft radial exhaust fan positioned between the motor 1048 and the filter 1088. The fan 1200 is mounted to an output shaft of the motor 1048 such that torque from the motor 1048 drives rotation of the fan 1200. Accordingly, the rotational axis of the fan 1200 is coaxial with the motor axis Al. As Figure 22As best shown, air enters the fan 1200 from two opposite directions along the axis of rotation A1 of the fan 1200. Specifically, a cooling air flow path (AF2) enters the fan 1200 from the top side of the fan 1200, while a suction air flow path (AF1) enters the fan 1200 from the bottom side of the fan 1200. Once air from either air flow path reaches the fan 1200, the air is directed radially outward from the fan 1200 to be exhausted.

[0202] In particular, the fan 1200 draws cooling air into the rotary hammer 1004 through an inlet opening 1066 in the housing 1012 of the rotary hammer 1004. The cooling air flow (AF2) is then drawn past the motor 1048 to cool the motor 1048. In some embodiments, the interior surface of the housing 1012 includes a rib that serves to direct the cooling air flow (AF2) into the motor 1048, ensuring that the cooling air flow (AF2) travels past the motor 1048. The fan 1200 can further draw cooling air through the controller 1205 to cool the controller 1205. After passing through one or both of the motor 1048 and the controller 1205, the cooling air flow (AF2) enters the fan 1200 from the top side of the fan 1200 and exits radially through an outlet 1104 of the fan 1200. The cooling air flow (AF2) is then exhausted from the rotary hammer 1004 through an outlet opening 1074 in the housing 1012 of the rotary hammer 1004. Figure 20 ) Specifically, the outlet 1104 is formed as a radial opening in a shroud 1072 of the fan 1200 that is aligned with the outlet opening 1074 to direct air to the exterior of the rotary hammer 1004. In some embodiments, the outlet opening 1074 is disposed on a single side of the housing 1012, and the outlet 1104 of the shroud 1072 is disposed on a single side of the housing 1012.

[0203] The fan 1200 also generates a suction air flow (AF1), in which air is directed toward the fan 1200 through the dust collection assembly 1008 in the opposite direction of the cooling air flow (AF2), before being directed radially out of the exhaust 1204. In particular, air is drawn into the nozzle 1076, through the dust tube 1040, through the dust transfer tube 1045 (i.e., the outer transfer tube 1140 and the inner transfer tube 1141), and into the dust container 1084, which traps dust. Clean air is drawn up through the filter 1088 into the fan 1200 and is exhausted through the outlet 1104 and the opening 1074. After the dust is separated from the air via the filter 1088, the clean air is exhausted. In some embodiments, the filter 1088 is a high efficiency particulate air (“HEPA”) filter.

[0204] Accordingly, the rotation of the fan 1200 simultaneously generates a suction air flow (AF1) and a cooling air flow (AF2). In the illustrated embodiment, the fan 1200 is a dual-fin fan having a first set of fan blades 1078 and a second set of fan blades 1080, as shown. Figure 27 As best shown, a first set of fan blades 1078 is used to generate an extraction airflow (AF1), and a second set of fan blades 1080 is used to generate a cooling airflow (AF2). However, other types of fans may be used to generate one or both airflows. For example, in some embodiments, a fan with a single set of fan blades may generate both the extraction airflow (AF1) and the cooling airflow (AF2). In some embodiments, the cooling airflow (AF2) and the dust extraction airflow (AF2) may be two separate airflows that are isolated from each other until they merge within fan 1200 and are discharged together as a combined airflow stream. In some embodiments, the cooling airflow is directed over other components of the rotary hammer 1004 (e.g., circuit boards) to cool these components as well.

[0205] In some embodiments, dust collection assembly 1008 may have additional features. For example, in the illustrated embodiment, the Hall plate for motor 1048 is positioned between motor 1048 and fan 1200. In addition, bearing 1202 supporting the output shaft of motor 1048 is also provided between motor 1048 and fan 1200 so that the cooling air flow passes through bearing 1202. This arrangement allows air from the suction air flow to enter filter 1088 and pass through fan 1200 from dust pipe 1040 without having to be guided around any bearings. In addition, this arrangement allows the cooling air for cooling motor 1048 and / or fan to pass through the stator of motor 1048 and be guided around the bearing support structure before reaching fan 1200.

[0206] The dust collection assembly 1008 may further include a filter cleaning mechanism 1148 ( Figure 23), the filter cleaning mechanism removes dust from the filter 1088. In one embodiment, the filter cleaning mechanism 1148 includes a solenoid 1082 that is activated to extend a pin 1086. The pin 1086 in turn engages an anvil 1090 that rotates to knock the filter 1088 and release the debris. As mentioned above, the controller 1205 is adapted to operate the dust collection assembly 1008 and the drive unit 1044. This allows coordination between the two assemblies. In one embodiment, the filter cleaning mechanism 1148 is automatically actuated when the fan 1200 transitions from an operational state to a non-operational state. In another embodiment, the filter cleaning mechanism 1148 is automatically actuated when the motor 1048 transitions from an operational state to a non-operational state. As used herein, the fan 1200 transitions from an operational state to a non-operational state when the fan 1200 stops rotating, or when the fan 1200 slows to a rotational speed below a predetermined threshold such that the airflow caused by the fan 1200 has effectively stopped. The controller 1205 can monitor an indication of the rotational state of the fan 1200. In some embodiments, the controller 1205 can be configured to monitor the rotation of the fan 1200 by using a Hall effect sensor to directly detect the rotational speed of the fan 1200 (e.g., by using a magnet that rotates with the fan 1200). In another embodiment, the fan 1200 transitions from an operational state to a non-operational state when the motor 1048 no longer transmits rotational force to the fan 1200. Similarly, the motor 1048 can transition from an operational state to a non-operational state when the motor 1048 stops rotating or when the motor 1048 slows to a predetermined rotational speed threshold. For example, the controller 1205 can monitor a sensor that detects the voltage or current applied to the motor 1048 to determine whether the motor 1048 has transitioned from an operational state (i.e., providing torque to the fan 1200) to a non-operational state.

[0207] Figure 28 Another embodiment of a filter cleaning mechanism 1448 is provided. In the illustrated embodiment, the filter cleaning mechanism 1448 includes an actuator in the form of a clutch bearing 1464 (i.e., a one-way bearing) positioned between the shaft of the motor 1048 and a rotatable plate 1462 having a plurality of tenons 1466. Under normal operation, the motor 1048 and the fan 1200 rotate about the rotational axis Al in a first direction (i.e., counterclockwise in FIG. 14A). When rotating in the first direction, torque from the motor 1048 is not transferred to the plate 1462. However, once the fan 1200 transitions from an operational state to a non-operational state (i.e., slows to a stop or slows below a predetermined threshold speed), the motor 1048 is configured to rotate in a second or opposite direction (i.e., clockwise in FIG. 14A). When rotating in the second direction, torque from the motor 1048 is transferred to the plate 1462, which in turn rotates the tenons 1466 to knock the filter 1088 and release the debris. Figure 28 Figure 28 ​The clutch bearing 1464 allows the motor 1048 to pulse in one direction (e.g., clockwise) and then in the opposite direction (e.g., counterclockwise). As the motor 1048 pulses in the clockwise direction, the torque is transferred to the plate 1462 due to the action of the clutch bearing 1464. The tenon 1466 extending from the plate 1462 in turn engages the link 1468, which in turn impacts the filter 1088. In the illustrated embodiment, the link 1468 rotates about a pivot 1472.

[0208] The integration of the dust collection assembly 1008 within the rotary hammer 1004 can provide several different benefits. For example, the integration of the dust collection assembly 1008 within the rotary hammer 1004 can allow for a reduction in the number of components used for the operation of the rotary hammer 1004 and the dust collection assembly 1008. This in turn can reduce the overall cost of the system. Furthermore, in some embodiments, the reduction in components can also reduce the overall weight and size of the system. Also, in some embodiments, the profile of the tool system is more compact, which can allow for easier manipulation and gripping of the tool system by a user. It should be understood that the various features and embodiments described in the present disclosure can be mixed or interchanged into different combinations of features and embodiments.

[0209] For example, the disclosed rotary hammer 1004 utilizes a single power source (e.g., battery 1056) and a single electric motor 1048 to operate the drive assembly 1052 and the dust collection assembly 1008. Furthermore, the rotary hammer 1004 includes a single controller adapted to control the operation of the drive assembly 1052 and the dust collection assembly 1008. Furthermore, a single fan 1200 can be used to create two different air flow paths, including a suction air flow path and a cooling air flow path. The first air flow path is the dust collector flow path in which the dusty air enters through the nozzle 1076, travels through the dust tube 1040, enters the outer transfer tube 1140 and the inner transfer tube 1141, and deposits the dust into the dust container 1084 with the help of the filter 1088. The air flow in the dust collector flow path is driven by the fan 1200 and the motor 1048. The second flow path is characterized as a cooling flow path that directs clean air over the motor 1048 and / or the controller 1205 or other components of the drive assembly to cool these components.

[0210] In some embodiments, the rotary hammer 1004 is compatible with ONE-KEY®. In particular, the rotary hammer 1004 is capable of wireless communication (e.g., using Bluetooth or other near field communication protocol), allowing the rotary hammer 1004 to be monitored and / or controlled via a remote device (e.g., a smartphone). When wirelessly connected to a remote device, the remote device can track the location of the rotary hammer 1004, monitor the battery 1056, remotely lock the trigger 1098, and control other aspects of the rotary hammer 1004. For example, a user can control or adjust the speed and / or torque output of the motor 1048. Likewise, a user can adjust other operational settings of the tool. In some embodiments, the ONE-KEY electronics are incorporated within the controller 1205. However, in other embodiments, the ONE-KEY electronics can be provided through a separate controller PCB.

[0211] While a number of embodiments of the rotary hammer have been described above, one of ordinary skill in the art will appreciate that various features and components of the described embodiments are interchangeable. Moreover, although the present disclosure has been described with reference to certain preferred embodiments, variations and modifications exist within the scope and spirit of one or more aspects of the disclosure as described.

[0212] Figures 32 to 33 A rotary hammer 2004 according to one embodiment is shown, including a body 2016, a dust collection assembly 2008, and a drive assembly 2052. The body 2016 includes a front end 2024 and a rear end 2028. The front end 2024 includes a tool accessory such as a tool bit 2032, a sander, a squeezer, a grinder, a cutter, or other accessory. The dust collection assembly 2008 is also positioned on the front end 2024 and fluidly connects an area around the tool bit 2032 to a dust collection tank 2084. The dust collection tank 2084 is removably coupled to the bottom of the body 2016 and receives dust and debris from a transfer tube 2140. The rear end 2028 includes a handle 2020 and a dovetail track 2030 capable of receiving an auxiliary handle 2300 (shown in Figure 39 、 Figure 40 and Figure 42 . Referring to Figure 33 , the drive assembly 2052 is positioned inside the body 2016 and is powered by a single power source (e.g., a battery 2056) and an electric motor 2048. The motor 2048 drives an impact mechanism 2058 through a set of bevel gears 2054 and reciprocates the tool bit 2032 and performs work on a workpiece. The impact mechanism 2058 for this rotary hammer 2004 can include or otherwise be similar to the impact mechanism disclosed in U.S. Patent No. 9,289,890.

[0213] As Figure 34A and Figure 34BAs shown, the dust collection bin 2084 can include a locking system 2086 that prevents the dust collection bin 2084 from being connected to the main housing 2016 when the filter 2088 is not installed. It should be appreciated that some components of the locking system 2086 can be provided on the dust collection bin 2084 while other components of the locking system 2086 can be provided on the main housing 2016. The locking system includes a stop bar 2190, a stop surface 2192, and an actuation feature 2194. The stop bar 2190 and the stop surface 2192 can be used to interfere with the attachment of the dust collection bin 2084 to the main housing 2016 when the filter 2088 is not installed. For example, the stop surface 2192 and the stop bar 2190 can collide or be arranged in an incompatible manner unless the filter 2088 is installed. The actuator feature 2194 can be operated to adjust one or both of the stop surface 2192 and the stop bar 2190 so that the stop surface and the stop bar can be arranged in a compatible manner that allows the dust collection bin 2084 to be connected to the main housing 2016. For example, the actuation feature 2194 can be a component on the filter 2088 or a component enabled by the installation of the filter 2088 that adjusts one or both of the stop surface 2192 and the stop bar 2190 so that the stop surface and the stop bar no longer interfere with the installation of the dust bin 2084 on the main housing 2016.

[0214] Figure 34A and Figure 34BOne exemplary embodiment of a locking system 2086 is shown. However, it should be understood that variations can be applicable so long as the components function in the manner described. In the embodiment shown, a stop bar 2190 is formed on the dust collection bin 2084 and includes a first contact surface 2196 and a second contact surface 2198. A stop surface 2192 is part of the housing 2016 and is configured to selectively contact the first contact surface 2196 of the stop bar 2190. An actuation feature 2194 is formed on the filter 2088 and is configured to contact the second contact surface 2198 of the stop bar 2190 when the filter 2088 is properly installed in the dust collection bin 2084. When the stop bar 2190 is in a first position, the dust collection bin 2084 cannot be installed onto the housing 2016 because the first contact surface 2196 of the stop bar 2190 impacts the stop surface 2192 during installation, thereby preventing the dust collection bin 2084 from being positioned close enough to the housing 2016 to engage a latching mechanism (not shown) between the dust collection bin 2084 and the housing 2016. When the filter 2088 is installed, the actuation feature 2194 contacts the second contact surface 2198 of the stop bar 2190, and the stop bar 2190 moves to a second position. When the stop bar 2190 is in the second position, the first contact surface 2196 no longer blocks the stop surface 2192 when the dust collection bin 2084 is installed, thereby allowing the dust collection bin 2084 to be positioned adjacent to the housing 2016 so that the latching mechanism can engage and connect the dust collection bin 2084 to the housing 2016.

[0215] Figure 35A 、 Figure 35B and Figure 35C An auxiliary handle 2302 is shown that provides a secondary support for a user to hold when manipulating the rotary hammer 2004. The auxiliary handle 2302 can be optionally removably attached to the rotary hammer 2004. The auxiliary handle 2302 extends at least partially through the main body 2016 or other housing section of the rotary hammer 2004. In the embodiment shown, the auxiliary handle 2302 is positioned between the main body 2016 and the handle 2020. The auxiliary handle 2302 extends from the side of the rotary hammer 2004 in a direction that crosses the main handle 2020. In some embodiments, the auxiliary handle 2302 can extend generally normal to the working axis 6A of the handle 2020 and / or the rotary hammer 2004. However, in other embodiments, the auxiliary handle 2302 can be positioned in different locations and / or different orientations on the rotary hammer 2004 housing. Additionally, in some embodiments, the auxiliary handle 2302 can be positioned on the left or right side of the rotary hammer 2004. Furthermore, in some embodiments, the auxiliary handle 2302 can be positioned in an extended position or a retracted position.

[0216] Figure 35A 、 Figure 35Band Figure 35C An exemplary embodiment of an auxiliary handle 2302 is shown that can be removably attached to the rotary hammer 2004. The illustrated auxiliary handle 2302 includes a tube 2321, a pommel grip 2330, a pin housing 2323, a pin 2325, a pin spring 2327, a plurality of balls 2329, and an actuator 2331. The tube 2321 is secured to the rotary hammer 2004 and supports the other components of the auxiliary handle 2302 on the rotary hammer 2004. In some embodiments, the tube 2321 is formed as a separate component, while in other embodiments, the tube 2321 is integrally formed into the housing of the rotary hammer 2004. The tube 2321 can removably receive the other components of the auxiliary handle 2303 in order to allow the auxiliary handle 2302 to be selectively attachable to and removable from the rotary hammer 2004. The tube 2321 extends through at least a portion of the housing of the rotary hammer 2004. In embodiments where the tube 2321 extends through the entire width of the rotary hammer 2004, the auxiliary handle 2302 can be used as a two-handed universal handle that can be positioned on either the left or right side of the rotary hammer 2004.

[0217] The pommel grip 2330 provides an area for a user to grasp to stabilize the rotary hammer 2004. In other embodiments, other shapes and styles of grips and handles can be used to provide an area for a user to hold onto. The pommel grip 2330 is attached to the end of the pin housing 2323 that houses the pin 2325 and the plurality of balls 2329. The pin housing 2323 and the pin 2325 are slidably received within a port 2337 formed by the tube 2321.

[0218] By changing the position of the pin housing 2323 relative to the tube 2321, the auxiliary handle 2302 can be positioned on the rotary hammer 2004 in a variety of different arrangements. In the illustrated embodiment, the pin housing 2323 and the pin 2325 can be inserted into the tube 2321 from either the left or right side of the tube 2321 to arrange the auxiliary handle on either side of the rotary hammer 2004. Additionally, the auxiliary handle 2302 can be positioned on the left side of the rotary hammer 2004 in a retracted position or an extended position. Likewise, the auxiliary handle 2302 can be positioned on the right side of the rotary hammer 2004 in a retracted position or an extended position. In other embodiments, the auxiliary handle 2302 can be positioned in a plurality of positions between the retracted position and the extended position.

[0219] Various arrangements of the assist handle 2302 can be achieved by locking the pin housing 2323 in different positions relative to the tube 2321 using the balls 2329 and the pin 2325. The pin housing 2323 can include ball holes 2333 to carry the balls 2329. In the illustrated embodiment, the balls 2329 are carried by the pin housing 2323, however, it should be appreciated that in other embodiments, the balls 2329 can be carried by the tube 2321. The pin 2325 extends through a central hole in the pin housing 2323 and is slidable relative to the pin housing 2323 between a locked position Figure 35A and Figure 35C and an unlocked position Figure 35B When in the locked position, the pin housing 2323 is fixed relative to the tube 2321. When in the unlocked position, the pin housing 2323 is slidable relative to the tube 2321.

[0220] The pin 2325 can include a pin groove 2335 that selectively receives the balls 2329 when the pin 2325 is in the unlocked position. The balls 2329 are generally retained within the ball holes 2333 of the pin housing 2323. However, the balls 2329 have a limited radial inward and outward movement. When the pin 2325 is positioned within the pin housing 2323 such that the pin groove 2335 is aligned with the balls 2329 and the ball holes 2333, the balls 2329 can move radially inward to at least partially retreat into the pin groove 2335. When the pin groove 2335 is not aligned with the ball holes 2333, the balls 2329 are pushed radially outward by the pin 2325 such that the balls 2329 extend beyond the outer perimeter of the pin housing 2323. When the balls 2329 extend beyond the outer perimeter of the pin housing 2323, the balls can engage with receiving openings 2339 in the tube 2321 to lock the axial position of the pin housing 2323 relative to the tube 2321. In this manner, the pin 2325 and the balls 2329 act as a locking mechanism.

[0221] When in the default position, the assist handle 2302 is biased toward the locked position, as shown in Figure 35A and Figure 35C The pin spring 2327 can axially bias the pin 2325 (toward the left in Figures 35A to 35C such that the pin groove 2335 is not aligned with the balls 2329, thereby pushing the balls 2329 radially outward toward the locked position. To unlock the assist handle 2302, a user can squeeze the actuator 2331 toward the saddle grip 2330, which axially slides the pin 2325 within the pin housing 2323 until the pin groove 2335 is aligned with the balls 2329, thereby allowing the balls 2329 to retreat into the pin groove 2335 (as shown in Figure 35BThe auxiliary handle 2302 can be adjusted to different positions or can be completely removed from the rotary hammer 2004 when in the unlocked position. Actuating the release actuator 2331 causes the pin spring 2327 to bias the pin 2325 back toward the locked position, where the pin recess 2335 is not aligned with the ball 2329 and the ball 2329 is biased radially outward.

[0222] The auxiliary handle 2302 can be arranged in various positions on the rotary hammer 2004 or can be completely removed. The tube 2321 can include one or more receiving openings 2339 for locking the auxiliary handle 2302 in different positions on the rotary hammer 2004. It should be appreciated that a greater or lesser number of openings can be provided in the tube 2321 to create different positions of the auxiliary handle 2302. The following is a description of some possible configurations of the auxiliary handle 2302 based on which openings 2339 the ball 2329 engages. In the illustrated embodiment, the tube 2321 includes a first receiving opening 2339A (or right opening, as Figures 35A to 35C depicted) and a second receiving opening 2339B (or left opening, as Figures 35A to 35C depicted). Figure 35A An auxiliary handle 2302 in the retracted position positioned on the right side of the rotary hammer 2004 is illustrated. In this configuration, the pin housing 2323 and pin 2325 are inserted into the tube 2321 from the first side (e.g., the right side, as Figure 35A depicted) with the ball 2329 engaged with the second receiving opening 2339B (e.g., on the left side). In this way, the pin housing 2323 and pin 2325 are inserted deeper into the tube 2321 with only a small portion of the auxiliary handle 2302 extending outside of the rotary hammer 2004. The auxiliary handle 2302 can be further pulled out of the tube 2321 to be placed in the extended position, as Figure 35C depicted. In the extended position, the ball 2329 is engaged with the first receiving opening 2339A (e.g., on the right side) with a greater portion of the auxiliary handle 2302 extending out of the rotary hammer 2004.

[0223] In this way, the auxiliary handle 2302 functions as a telescoping handle that can be extended to different lengths. When the actuator 2331 is actuated and the ball 2329 is withdrawn from the receiving opening 2339, the auxiliary handle 2302 can be completely removed from the rotary hammer 2004. This allows the user to insert the auxiliary handle 2302 from both the left and right sides of the rotary hammer 2004. The auxiliary handle 2302 can also be positioned in both the retracted and extended positions when inserted into the tube 2321 from the left side. Prior to inserting the auxiliary handle 2302 into the tube 2321, the user must actuate the actuator 2331 in order to move the ball 2329 to the unlocked position.

[0224] In operation, the pin housing 2323 of the pommel handle 2330 can be inserted into either side of the tube 2321, depending on the user's preference. Additionally, the auxiliary handle 2302 can be positioned in a retracted position ( Figure 35A ) or extended position ( Figure 35C Before inserting the pin housing 2323, the user must squeeze the actuator 2331 to retract the balls 2329, allowing the pin housing 2323 to fit into the ports 2337 in the tube 2321. When the pin housing 2323 moves through the ports 2337 and the actuator 2331 is released, the balls 2329 eventually catch on the receiving openings 2339 in the tube 2321. When the balls 2329 engage the receiving openings 2339, the auxiliary handle 2302 is axially locked in place. The receiving openings 2339 are positioned to lock the auxiliary handle 2302 in either a retracted or extended position, depending on which set of receiving openings 2339 the balls 2329 engage. To release the auxiliary handle 2302 from the tube 2321, the actuator 2331 is squeezed, and the balls 2329 retract from the receiving openings 2339. This allows the pin housing 2323 to slide to another position or completely out of the tube 2321.

[0225] Figures 36 to 37 Another embodiment of a rotary hammer 3004 is shown having similar components as rotary hammer 2004 . Figures 36 to 37 The embodiments shown in FIG have similar reference numerals plus "3000" with the following differences explained below. Figures 36 to 37 As shown, the rotary hammer 3004 includes a body 3016, a handle 3020, a dust collection assembly 3008, and an auxiliary handle 3302. The body 3016 includes a front end 3024 and a rear end 3028. The handle 3020 is formed on the rear end 3028 of the body 3016 and includes a hook 3031. The hook 3031 can be attached to a safety belt worn by the user to support the rear end 3028 of the rotary hammer 3004.

[0226] Figures 38A to 38C Auxiliary handle 3302 is shown, which can replace auxiliary handle 2302. Accordingly, most of the description of auxiliary handle 2302 applies to auxiliary handle 3302, with the primary difference being the actuator. Auxiliary handle 3302 is received in a tube 3321 disposed on the hammer 3004 and can be removably coupled to the hammer 3004. Tube 3321 includes multiple receiving openings 3339 positioned at varying depths to allow auxiliary handle 3302 to be configured with varying lengths / depths or positioned on different sides of the hammer 3004. Auxiliary handle 3302 includes a pommel grip 3330, a pin housing 3323, a pin 3325, a set of balls 3329, and an actuator 3331.

[0227] The pommel handle 3330 is supported on the pin shell 3323 and can be used to better stabilize the rotary hammer 3004. The pin shell 3323 and pin 3325 are slidably received within a port 3337 formed by the tube 3321. By changing the position of the pin shell 3323 relative to the tube 3321, the secondary handle 3302 can be positioned on the rotary hammer 3004 in a variety of different arrangements. The pin shell 3323 slidably supports the pin 3325 such that the pin 3325 can slide axially within the pin shell 3323 between a locked and retracted position Figure 38A , a locked and extended position Figure 38C , and an unlocked position Figure 38B . The pin shell 3323 also supports the ball bearings 3329 within ball bearing holes 3333 that allow for limited radial movement of the ball bearings 3329. The pin 3325 also includes a pin groove 3335 that is shaped to at least partially receive the ball bearings 3329 when the pin groove 3335 is axially aligned with the ball bearings 3329.

[0228] The secondary handle 3302 is biased toward the locked position by a pin spring 3350 when in the default position. The pin spring 3350 can axially bias the pin 3325 (toward the right in Figures 38A to 38C ) such that the pin groove 3335 is not aligned with the ball bearings 3329 and the ball bearings 2329 are pushed radially outward toward the locked position. The pin spring 3350 pulls the pin 3325 toward the pommel handle 3330 until the back end of the pin 3325 engages a limiting surface 3346 formed by the pin shell 3323 or the pommel handle 3330.

[0229] An actuator 3331 is mounted in a cavity 3348 of the pommel handle 3330 and is biased by the pin spring 3350 to be flush with the outer surface of the pommel handle 3330. To unlock the secondary handle 3302, a user can press the actuator 3331 into the central cavity 3324 such that the actuator 3331 is no longer flush with the outer surface of the pommel handle 3330. The actuator 3331 is coupled to the pin 3325 and thus causes the pin 3325 to slide axially within the pin shell 3323 (toward the left in Figures 38A to 38C ) such that the back end of the pin 3325 is no longer engaged with the limiting surface 3364 as depicted in Figure 38B . Pressing the actuator 3331 also causes the pin 3325 to slide until the pin groove 3335 is aligned with the ball bearings 3329, allowing the ball bearings 3329 to retreat into the pin groove 3335, thereby unlocking the secondary handle 3302.

[0230] To install the secondary handle 3302, a user must first press the actuator 3331. The secondary handle 3302 can be inserted into either side of the tube 3321 when the set of ball bearings 3329 are in the pin groove 2335. Once in the tube 3321, the secondary handle can be positioned in the extended position Figure 38C ) or a stowed position ( Figure 38B ). The actuator 3331 is released and the pin 3325 moves toward the saddle handle 3330 until the pin strikes the limiting surface 3346. The ball 3329 moves radially outward and engages the aligned receiving opening 3339. When the ball 3329 engages the receiving opening 3339, the auxiliary handle 3302 is axially locked until the actuator 3331 is again depressed.

[0231] In other embodiments, the rotary hammer 2004 can include an auxiliary handle 2300 as shown in Figure 39 and Figure 40 . The auxiliary handle 2300 includes a D-shaped handle 2320, a lockable hinge 2322, and a coupling mechanism 2324. The D-shaped handle 2320 allows the user to hold the back of the handle 2320 with a hand for better support of the rotary hammer 2004. This style of handle 2320 can be helpful when the desired drilling location is above or offset from the user. The lockable hinge 2322 connects the coupling mechanism 2324 and the auxiliary handle 2300 and allows the auxiliary handle to remain in an operational position ( Figure 39 ) or a stowed position ( Figure 40 ). In the operational position ( Figure 39 ), the auxiliary handle 2300 is aligned generally along the working axis A6 of the rotary hammer 2004. In the stowed position ( Figure 40 ), the auxiliary handle 2300 is located alongside the main housing 2016 and the rotary hammer 2004 has a shorter length than when the auxiliary handle 2300 is in the operational position. As shown in Figures 41A to 41C , the lockable hinge 2322 includes a button 2328, a set of locking cams 2332, a locking element 2334, and a button spring (not shown). To transition between the operational position and the stowed position, the user depresses the button 2328 ( Figure 41A ), and then the locking element 2334 is pushed outward and disengages from the set of locking cams 2332 formed in the auxiliary handle 2300. The user rotates the auxiliary handle 2300 to the operational position or the stowed position ( Figure 41B ), and when either position is reached, the locking element 2334 is biased back into engagement with the locking cams 2332 by the button spring (not shown). Finally, as shown in Figure 41C , the locking element 2334 pushes the button 2328 upward and the auxiliary handle 2300 can no longer be rotated.

[0232] Figure 42A compact secondary handle 2303 is shown that includes a curved grip 2319 and a coupling mechanism 2324. The compact secondary handle 2303 with the curved grip 2319 creates space for the second hand of the user and is more compact, allowing the rotary hammer 2004 to fit into tighter spaces. Additionally, the more compact rotary hammer 2004 allows the user to apply more pressure during a drilling operation.

[0233] Figure 43 A shoulder rest secondary handle 2304 for use with the rotary hammer 2004 is shown. The shoulder rest secondary handle 2304 includes a first end 2306 proximate the handle 2020 and a rear end 2308 opposite the first end 2306. An alternative embodiment of the coupling mechanism 2324 selectively couples the shoulder rest secondary handle 2304 to the rear of the handle 2020 proximate the first end 2306. The shoulder rest secondary handle 2304 extends from the rear end 2028 in the same direction as the working axis A6. In some embodiments, the shoulder rest assembly 2304 can be arranged coaxially with the tool bit axis 2312, while in other embodiments, the shoulder rest secondary handle 2304 can be arranged parallel to the working axis A6. In some embodiments, the coupling mechanism 2324 can include a snap fit or a rotational connection (e.g., including threads or a locking ring to constrain rotation). The shoulder rest secondary handle 2304 includes an extension tube 2314 and a rest 2316. The extension tube 2314 extends between the first end 2306 and the second end 2308 and connects the coupling mechanism 2324 to the rest 2316. Additionally, the rest 2316 is movable relative to the extension tube 2314 to adjust the position of the rest 2316 relative to the rotary hammer 2004 to accommodate users with different length arms. In other embodiments, the shoulder rest secondary handle 2304 can include additional extension tubes to extend the rest 2316 further. In the shown embodiment, the extension tube 2314 is formed of a first material, such as a rigid plastic, and the rest 2316 is formed of a second material, which can be the same or different than the first material, such as another plastic or a metal. In some embodiments, the shoulder rest assembly 2304 can be formed using an additive manufacturing process, such as 3D printing. In other embodiments, the shoulder rest assembly 2304 can be formed by other processes, such as a plastic molding process.

[0234] With continued reference to Figure 43The shoulder support assist handle 2304 includes a cushion 2318 coupled to the rear end of the support 2316, and a locking actuator 2292 operable to adjust the position of the support 2316 along the telescoping tube 2314 between an extended position and a retracted position and subsequently lock the support 2316 in the selected position. In the illustrated embodiment, the locking actuator 2292 is a spring-biased lever that pivots to adjust the position of the support 2316 relative to the telescoping tube 2314. In other embodiments, the locking actuator 2292 may be a button or the like. The cushion 2318 provides additional shock absorption for user comfort, thereby preventing bruising and fatigue when applying pressure to the rotary hammer 2004. In some embodiments, the cushion 2318 may be formed from a polyurethane gel pad or polyethylene foam. The support 2316 may further rest against the user's arm or shoulder to support the rotary hammer 2004 during operation. When placed against the user's shoulder, the butt 2316 provides additional stability, control, and comfort by adding an additional contact area. Specifically, the additional contact area facilitates the user performing drilling or chiseling applications to offset the impact caused by the impact mechanism 2058. Additionally, the shoulder rest assembly 2304 allows the user to grip the butt 2316 directly from behind to help support the weight of the hammer 2004 when drilling upward.

[0235] like Figure 44 As shown, coupling mechanism 2324 attaches either assist handle 2300 or 2303 to dovetail track 2030 and includes a track support 2338, a track handle 2340, and a rod 2344. Track support 2338 and track handle 2340 form a track opening 2352 shaped to fit over dovetail track 2030. Track opening 2352 is slightly larger than dovetail track 2030 to allow coupling mechanism 2324 to slide thereon. Rod 2344 is then rotated about rod axis A7 to compress track handle 2340 onto dovetail track 2030. As a result, track opening 2352 contracts and secures assist handle 2300 to hammer 2004. To release assist handle 2300, rod 2344 is rotated in the opposite direction, and track handle 2340 expands opening 2352, allowing assist handle 2300 to be removed from hammer 2004.

[0236] exist Figures 45 to 47 An alternative embodiment of the coupling mechanism 2324L is shown in FIG. In the illustrated embodiment, the coupling mechanism 2324L includes a coupling body 2354, a slidable button 2360, and a button spring 2363. Figure 46As shown, the coupler body 2354 has a track opening 2352L shaped to fit the dovetail track 2030 and a secondary handle support 2356. The slidable button 2360 includes a button handle 2362, a button shaft 2364, a spring support 2367, and a locking extrusion 2368. A button spring 2363 is positioned between an inner wall 2370 of the coupler body 2354 and the spring support 2367. A locking notch 2372 is formed on the dovetail track 2030 and is L-shaped. To begin the coupling process, the slidable button 2360 is pushed against the button spring 2363 so that the locking extrusion 2368 aligns with the locking notch 2372 in the dovetail track 2030. When aligned, the coupling body 2354 is slid onto the dovetail track 2030 via the track opening 2352L until the locking extrusion 2366 cannot slide further. At the end of the locking notch 2372, the button spring 2362 biases the slidable button 2360 outward and the locking extrusion 2368 fits into the locking portion 2374 of the locking notch 2372, as Figure 47 seen. To uncouple the coupling mechanism 2324L, the slidable button 2360 is pushed inward against the button spring 2363 and the coupling body 2354 can be slid out of the dovetail track 2030 of the rotary hammer 2004.

[0237] In Figure 48 and Figure 49 another embodiment of a coupling mechanism 2324M is shown. In the illustrated embodiment, the coupling mechanism 2324M includes a coupler body 2354M, a shaft (not shown), and a locking lever 2344M. The coupler body 2354M includes a pair of shaft supports 2378 configured to receive the shaft, a track opening (not shown) for the dovetail track 2030, an engagement opening 2380, and a secondary handle support 2356M. The locking lever 2344M includes an engagement surface 2382 and a through hole 2384 configured to receive the shaft. The shaft supports 2376 are positioned on the top of the coupler body 2354M and the locking lever 2344M fits between the shaft supports 2376. In operation, the track opening (not shown) is slid onto the dovetail track 2030 and the user rotates the locking lever 2344M. When rotated, the engagement surface 2382 presses against the dovetail track 2030 through the engagement opening 2380 of the coupler body 2354M, as Figure 49 seen. When the engagement surface 2382 presses against the track 2030, the friction between the track 2030 and the coupling body 2354M increases, effectively locking the track 2030 and the coupling body 2354M together. To release the coupling body 2354M from the track 2030, the locking lever 2344M is rotated in the opposite direction and then the coupling body 2354M can be slid out of the track 2030.

[0238] In Figure 50A and Figure 50B Another embodiment of a coupling mechanism 2324N is shown in FIG. 23. In the illustrated embodiment, the rear end 2028N of the rotary hammer 2004 can include a threaded insert 2386. The auxiliary handle 2300N includes a threaded portion 2388 that can be screwed into the threaded insert 2386. To release the auxiliary handle 2300N, the threaded portion 2388 is unscrewed from the threaded insert 2386.

[0239] Figure 48 A dust collection assembly 2008 is shown that includes a dust hose 2040, a hose spring 2212, a nozzle 2076, and a hose coupling 2222. It should be noted that the illustrated dust hose 2040 is a collapsible dust hose, however, other types of dust hoses can be used. The dust hose 2040 surrounds the tool bit 2032 and prevents debris from tool operation from entering the surrounding environment. Instead, the debris is collected by the suction air flow generated by the suction fan 2092 and transferred from the work surface to the dust container 2084 (see FIG. 23) through the dust hose 2040 and the external transfer hose 2140. Figure 33 The hose spring 2212 fits between the nozzle 2076 and the hose coupling 2222 and is used to bias the dust hose 2040 into the work surface. The nozzle 2076 is positioned on a first end of the dust hose 2040 and includes a plurality of air flow grooves 2226. The air flow grooves 2226 are formed radially around the dust hose 2040 and allow air to enter when pressed against the work surface.

[0240] Figure 52 The hose coupling 2222 is shown how it attaches a second end of the dust hose 2040 to the external transfer hose 2140, which creates the suction air flow path. Figure 52 The hose coupling 2222 is shown including a set of locking tabs 2228 formed radially on the hose coupling 2222 and each locking tab 2228 includes a locking hole 2230. On the external transfer hose 2140, a set of locking protrusions 2232 are formed radially and shaped to fit into the locking holes 2230. To connect the hose coupling 2222 and the second end of the dust hose 2040, the user aligns the locking holes 2230 on the locking tabs 2228 with the locking protrusions 2232 and slides the hose coupling 2222 along the work axis A6. When the locking tabs 2228 reach the locking protrusions 2232, the locking tabs 2228 flex outward until the locking protrusions 2232 fit into the locking holes 2230. To disassemble the hose coupling 2222, the user must manually flex the locking tabs 2228 outward so that the locking protrusions 2232 no longer insert into the locking holes 2220 and slide the hose coupling 2222 outward along the work axis A6.

[0241] Figure 53A, Figure 53B and Figure 53C A storage locking assembly 2256 of the dust collection assembly 2008 is shown. When storing the rotary hammer 2004, a user can want to retract the dust tube 2040 to reduce the overall length of the rotary hammer 2004. The storage locking assembly 2256 includes a plurality of radial cams 2258 on the tube end cap 2074 and a plurality of locking slots 2260 on the tube coupler 2222. To move the dust tube 2040 from an expanded configuration to a retracted configuration (shown in Figure 53A ), the user must compress the dust tube 2040 against the biasing force of the tube spring 2212 using the tube end cap 2074. As Figure 53B shown, as the tube end cap 2074 is moved closer to the tube coupler 2222, the user must rotate the tube end cap 2074 so that the plurality of radial cams 2258 are aligned with the plurality of locking slots 2260. Next, as Figure 53C shown, the user inserts the radial cams 2258 into the locking slots 2260 and twists the nozzle 2076 until the radial cams 2258 contact the end of the locking slots 2260. Now, the dust tube 2040 is in the retracted position and remains in that position until the tube end cap 2074 is twisted in the opposite direction.

[0242] In another embodiment, shown in Figure 54A and Figure 54B , the tube coupler 2222P includes a plurality of locking tabs 2228P and a plurality of locking extrusions 2262. As Figure 54A shown, the transfer tube 2140P includes an annular recess 2264 and a plurality of holes 2230P shaped to mate with the locking extrusions 2228P of the tube coupler 2222P. To couple the tube coupler 2222P and the transfer tube 2140P, the user slides the tube coupler 2222P into the annular recess 2264 and aligns the holes 2230P with the locking extrusions 2262. When properly aligned, as Figure 54B shown, the locking extrusions 2228P are inserted into the holes 2230P and are rotatably and axially locked to the transfer tube 2140P. To remove the tube coupler 2222P, the operator will flex the locking extrusions 2228P inwardly out of engagement with the holes 2230P.

[0243] In another embodiment, shown in Figure 55A and Figure 55BIn another embodiment shown, tube coupler 2222Q includes a set of alignment extrusions 2266, a first plurality of magnets (not shown), and a first plurality of magnet pockets (not shown) for receiving the first plurality of magnets. Transfer tube 2140Q includes a set of alignment slots 2268 shaped to receive alignment extrusions 2266, a second plurality of magnets (not shown), and a second plurality of pockets 2270 for receiving the second plurality of magnets. To couple tube coupler 2222Q and transfer tube 2140Q, a user must match alignment extrusions 2266 on tube coupler 2222Q with alignment slots 2268 of transfer tube 2140Q and slide tube coupler 2222Q until the first plurality of magnets attract the second plurality of magnets, or vice versa. As shown Figure 55B When the first plurality of magnets and the second plurality of magnets are in contact with each other, tube coupler 2222Q is axially and rotatably coupled to transfer tube 2140Q.

[0244] In another embodiment shown, Figure 56A and Figure 56B In another embodiment shown, tube coupler 2222R includes a set of cam levers 2274 hinged on a set of cam lever supports 2272. Transfer tube 2140R includes cam openings 2278 shaped to receive insertion ends 2280 of cam levers 2274. To couple tube coupler 2222R to transfer tube 2140R, a user aligns cam levers 2274 with cam openings 2278. The user then rotates each cam lever 2274 and presses insertion end 2280 of cam lever 2274 into corresponding cam opening 2278. When insertion end 2280 is pressed into cam opening 2278, tube coupler 2222R is axially and rotatably locked onto transfer tube 2140R.

[0245] In another embodiment shown, Figure 57A , Figure 57B and Figure 57C In another embodiment shown, transfer tube 2140S includes an opening hinge 2282 and a retaining member 2284. Tube coupler 2222S includes a hinge hook 2286, a locking pin 2288, and a latch 2290. As shown Figure 57A Opening hinge 2282 on transfer tube 2140S can receive hinge hook 2286, as shown Figure 57B Once opening hinge 2282 receives hinge hook 2286, tube coupler 2222S can be rotated to lay flat against transfer tube 2140S, and locking pin 2288 can engage with retaining member 2284 of transfer tube 2140S. Once locking pin 2288 is engaged, latch 2290 can be rotated to encircle retaining member 2284 and lock the rotational position of tube coupler 2222S. As shown Figure 57CAs shown, when the latch 2290 is closed and the hinge hook 2286 is engaged, the tube coupler 2222S is axially and rotatably locked to the transfer tube 2140S.

[0246] In Figures 58A-58C In another embodiment shown, the transfer tube 2140T includes a locking notch 2260T and the tube coupler 2222T includes a latch 2290T, a latch spring 2294, and a spring anchor 2296. The locking notch 2260T is formed radially around the transfer tube 2140T and can receive a locking feature 2298 of the latch 2290T. As Figure 58A To couple the tube coupler 2222T with the transfer tube 2140T, as shown, the user rotates the latch 2290T, thus aligning the locking feature 2298 with the locking notch 2260T. Once aligned, the user slides the tube coupler 2222T into the locking notch 2260T and releases the latch 2290T. As Figure 58B shown, when the latch 2290T is released, the latch spring 2294, which is connected to both the latch 2290T and the spring anchor 2296, biases the locking feature 2298 radially into the rest of the locking notch 2260T. To uncouple the transfer tube 2140T and the tube coupler 2222T, the user rotates the latch 2290T in the opposite direction and slides the locking feature 2298 outward out of the locking notch 2260T. Figure 57C

[0247] Figure 59 And Figure 60 A depth setting assembly 2234 is shown that allows a user to set a maximum drilling depth of the tool bit 2032 by preventing compression of the dust tube 2040. To accomplish this, the depth setting assembly 2234 includes a slidable feature (e.g., slidable feature 2236) that is axially fixed to the dust tube 2040 and slidable with the dust tube. For example, the slidable feature can be fixed to a first end of the dust tube 2040 and slidable when the dust tube 2040 is compressed. A guide member (e.g., guide rail 2238) is configured to guide the slidable feature. For example, the guide rail can be an elongated channel, a tubular member (long or short) that guides the slidable feature, or the like that is capable of guiding axial movement of the slidable feature in the direction of the working axis. Axial movement of the slidable feature relative to the guide rail defines the maximum drilling depth of the tool bit 2032. Accordingly, the depth setting assembly 2234 also includes an adjustable stop (e.g., 2242) that is capable of limiting axial movement of the slidable feature, and thus the drilling depth of the tool bit 2032.

[0248] Figure 59 And Figure 60 ​An exemplary embodiment of a depth setting component 2234 is provided. Figure 59 As shown, the depth setting assembly 2234 shown includes a slidable feature 2236 on the nozzle 2076, a guide track 2238, and an adjustable stop 2242. When the dust tube 2040 is compressed, the slidable feature 2236 on the nozzle 2076 moves along the guide track 2238. Moreover, the user can utilize a manual sliding feature 2244 formed into the slidable feature 2236 to compress the dust tube 2040. The guide track 2238 is mounted to the top of the main housing 2016, but in other embodiments, the guide track 2238 can be mounted on the left or right side of the main housing 2016. In addition, the guide track 2238 includes a plurality of adjustment notches 2246 that hold the adjustable stop 2242 in place. The adjustable stop 2242 slides along the guide track 2238 when unlocked and maintains the position of the adjustable stop in the guide track 2238 when locked. As shown Figure 60 As shown, the adjustable stop 2242 includes a stop body 2248, a leaf spring 2250, and a directional slider 2252. The stop body 2248 holds the leaf spring 2250 and directional slider 2252 and prevents the slidable feature 2236 from moving further into the guide track 2238. The leaf spring 2250 provides a locking force to prevent movement of the adjustable stop 2242 and is comprised of a set of engagement features 2254. The engagement features 2254 are shaped to mate with the adjustment notches 2246 in the guide track 2238 and are more resilient in one direction along the operating axis A6 than in other directions. The directional slider 2252 is attached to the top of the stop body 2248 and can move in either a first or second direction. When moved in either the first or second direction, the directional slider 2252 disengages one of the engagement features 2254, unlocking the adjustable stop 2242. When unlocked, the user moves the adjustable stop 2242 to a new desired position and then moves the directional slider 2252 in the opposite direction to reconnect the engagement feature 2254 to the adjustment notch 2246 and lock the position of the adjustable stop 2242 .

[0249] Figures 61A-61C Another embodiment of a storage locking mechanism 2256U is shown in FIG. The storage locking mechanism 2256U holds the dust tube 2040 in a retracted state for storage and includes a slidable lock 2402, a lock retainer 2404, and a spring-loaded pawl 2406. To engage the storage locking mechanism 2256U, the slidable feature 2236U slides along the guide track 2238U to a minimum position. Figure 58AAs shown, in the minimum position, the slidable lock 2402, which is assembled to the slidable feature 2236U via a pair of snap tabs 2408, is aligned with the lock keeper 2404 formed into the guide track 2238U. In order to lock the slidable feature 2236U, the user must push the slidable lock 2402 laterally toward the lock keeper 2404, thereby causing the spring-loaded ball detent 2406 ( Figure 61B ) moves downward away from the slidable lock 2402 to release the slidable lock 2402. Then, further pressing will move the slidable lock 2402 outward into engagement with the lock retainer 2404. When the slidable lock is engaged with the lock retainer 2404, as shown Figure 61C As shown, the slidable feature 2236U cannot slide along the guide track 2238U.

[0250] Figure 62A and Figure 62B Another embodiment of the storage locking mechanism 2256V is shown in FIG. Figure 62A As shown, the storage locking mechanism 2256V includes a pair of snap arms 2410 and a pair of receiving receptacles 2412. The snap arms 2410 are formed into a slidable feature 2236V that can slide along a guide track 2238V to adjust the position of the retractable dust tube 2040. To engage the storage locking mechanism 2256V, the slidable feature 2236V slides along the guide track 2238V to a minimum position. Figure 62B As shown, in the minimum position, the latch arms 2410 engage the receiving receptacle 2412 and prevent the slidable feature 2236V from moving along the guide track 2238V. To unlock the slidable feature 2236V, the user must simultaneously press both latch arms 2410 and slide the slidable feature 2236V away from the receiving receptacle 2412.

[0251] Figure 63A and Figure 63B Another embodiment of a storage locking mechanism 2256W is shown in FIG. The storage locking mechanism 2256W includes a rotation locking element 2414, a mounting interface 2416, and a pair of fixing hooks 2418. Figure 63A As shown, the rotation locking element 2414 is rotatably coupled to the mounting interface 2416 and includes a pair of locking hooks 2420 and a crossbar 2422 connecting the pair of locking hooks 2420. The mounting interface 2416 is formed on a slidable feature 2236W that can slide along the guide track 2238W to a minimum position. Figure 64BAs shown, once in the minimum position, the user can pivot the rotation locking element 2414 via the crossbar 2422 and engage the locking hook 2420 with a securing hook 2418 formed in the main housing 2016 of the rotation hammer 2004. When the locking hook 2420 is engaged with the securing hook 2418, the slidable feature 2236W cannot slide along the guide rail 2238W. To unlock the slidable feature 2236W, the user must pivot the rotation locking element 2414 in the opposite direction and disengage from the securing hook 2418.

[0252] Figure 64A and Figure 64B Another embodiment of a storage locking mechanism 2256X is shown in FIGS. 64-67. As shown in FIG. 64, the storage locking mechanism 2256X includes a rotation locking element 2414X and a pair of receiving receptacles 2412X. The rotation locking element 2414X is mounted to the slidable feature 2236X. The receiving receptacles 2414X are formed on the main housing 2016 of the rotation hammer tool 2004 and are shaped to mate with the rotation locking element 2414X. To engage the rotation locking element 2414X, the slidable feature 2236X is slid along the guide rail 2238X to a minimum position. As shown in FIG. 65, once in the minimum position, the user can rotate the rotation locking element 2414X 90 degrees clockwise or counterclockwise and engage the rotation locking element 2414X with one of the pair of receiving receptacles 2412X. When the rotation locking element 2414X is engaged with one of the pair of receiving receptacles 2412X, the slidable feature 2236X can no longer be slid along the guide rail 2238X. To unlock the slidable feature 2236X, the user pivots the rotation locking element 2414X 90 degrees in the opposite direction and disengages from the receiving receptacle 2412X. Figure 64B

[0253] Figures 65A-65B A dust collection assembly 3008 is shown, which can replace the dust collection assembly 2008. The dust collection assembly 3008 includes a dust tube 3040, a tube spring 3312 ( Figure 37 ), a nozzle 3076, a tube coupler 3222, a tube end cap 3074, and a transfer tube 3140. However, it should be understood that in some embodiments, the dust collection assembly 2008 can not include all of these components.

[0254] ​In the illustrated embodiment, the dust tube 3040 is comprised of a flexible material, such as a fabric (e.g., nylon) or a flexible plastic, that is compressible as the dust tube 3040 moves along the working axis A6 between the expanded and collapsed configurations. In other embodiments, the dust tube 3040 can be a rigid tube or a telescoping tube. The dust tube 3040 is biased toward the expanded configuration and is moved toward the collapsed position during a drilling operation or for storage. A tube spring 3312 is disposed between the tube coupler 3222 and the tube end cap 3074 and biases the dust tube 3040 to the expanded configuration Figure 65A The nozzle 3076 and the tube end cap 3074 are disposed on the second end of the dust tube 3040. It should be appreciated that in some embodiments, the nozzle 3076 can be integrally formed on the end cap 3074, while in other embodiments, the nozzle 3076 and the end cap 3074 are formed as separate pieces. The nozzle 3076 can further include a plurality of air flow grooves 3226.

[0255] The dust tube 3040 is removably coupled to the housing of the power tool by the tube coupler 3222. The tube coupler 3222 is positioned on the first end of the dust tube 2040 and includes a set of locking tabs 3228 that selectively couple to a set of locking protrusions 2232 on the transfer tube 3140. In some embodiments, the locking tabs 3228 can be directly coupled to the housing of the power tool. Also, in some embodiments, there can be a greater or lesser number of locking tabs 3228. In other embodiments, the dust tube 3040 can be non-removably coupled to the housing.

[0256] The tube coupler 3222 and the tube end cap 3074 can also form another embodiment of a storage lock assembly 3256. The storage lock assembly 3256 is configured to hold the dust tube 3040 in the collapsed configuration for storage and transport, where the length of the dust tube 3040 is less than the length of the dust tube 3040 when in the expanded configuration. The tube end cap 3074 includes a first locking feature 3268 that can selectively couple to a second locking feature 3270 on the tube coupler 3222. In the illustrated embodiment, the first locking feature is in the form of a pair of first locking arms 3268 and the second locking feature is in the form of a pair of second locking arms 3270. The first pair of locking arms 3268 is selectively engageable with the second pair of locking arms 3270 to selectively lock the dust tube 3040 in the collapsed position. In some embodiments, there can be a greater or lesser number of locking arms 3268 and 3270. Further, in other embodiments, the first locking feature 3268 and the second locking feature 3270 can be other types of locking features, such as detent members, hooks, snap-fit connectors, etc., that are capable of selectively locking an axial position of the tube end cap 3074 relative to the tube coupler 3222 so as to maintain the dust tube 3040 in the collapsed position.

[0257] In the default position, the dust tube 3040 is biased toward the expanded configuration, and the first and second pairs of locking arms 3268, 3270 are not engaged. To transition the dust tube 3040 to the contracted configuration, the user compresses the dust tube 3040 along the working axis A6, which also moves the first pair of locking arms 3268 and the tube end cap 3074 along the working axis A6. Once the dust tube 3040 is fully compressed, the user can rotate the tube end cap 3074 about the working axis A6 in a first direction (e.g., counterclockwise) until the first locking arms 3268 contact the tube coupler 3222. Next, as shown, the user releases the tube end cap 3074, and the tube spring 3312 partially biases the first locking arms 3268 outward and into engagement with the second pair of locking arms 3270. The dust tube 3040 is now in the contracted configuration. Figure 65B

[0258] To transition the dust tube 3040 to the expanded configuration, the user again compresses the dust tube along the working axis A6 and twists the tube end cap 3074 in a second direction (e.g., clockwise) until the second locking arms are no longer aligned with the first locking arms 3268. The user can then release the dust tube 3040, and the tube spring 3212 will bias the dust tube 3040 outward along the working axis A6. In other embodiments, the tube end cap 3074 is rotated about the working axis A6 in a clockwise direction to hold the dust tube 3040 in the contracted position, and the dust tube is released by rotating the tube end cap 3074 in a counterclockwise direction. The tube end cap 3074 can rotate about the working axis and relative to the nozzle 3076, which can remain fixed as the tube end cap 3074 is rotated.

[0259] Figures 66-68 Another embodiment of the depth setting assembly 3234 is shown, which includes a slidable feature 3236 and an adjustable stop 3242. The slidable feature 3236 is formed on the nozzle 3076 and fits into a guide track 3238 formed in the main housing 3016. The adjustable stop 3242 is slidable along the guide track 3238 and can be selectively locked at any point on the guide track 3238. As shown, the adjustable stop includes a wing nut 3214, a T-nut 3216, and a spacer 3218. In some embodiments, the wing nut 3214 is threaded to the T-nut 3216 and includes a knurled outer surface. The T-nut fits into the guide track 3238 and includes a set of alignment notches 3217. The spacer 3218 is positioned between the T-nut 3216 and the wing nut 3214 and includes a set of alignment extrusions 3219. The alignment extrusions 3219 are shaped to fit into the alignment notches 3217 when the wing nut 3214 is fully tightened. Figure 68 ​​

[0260] When locked onto the guide track 3238, the adjustable stop 3242 limits the insertion depth of the slidable feature 3236 to the position where the adjustable stop 3242 is secured onto the guide track 3238. To adjust the position of the adjustable stop 3242, the user rotates the wing nut 3214 to increase the spacing between the spacer 3218 and the T-nut 3216. The increased spacing reduces the friction between the spacer 3218 and the guide track 3238 and allows the user to freely move the adjustable stop 3242. Once the user finds the new desired position, they tighten the wing nut 3214 and lower the alignment extrusion 3219 of the spacer 3218 into the alignment notch 3217 of the T-nut 3218. When the spacer 3218 is fully lowered, the adjustable stop 3242 is frictionally locked onto the guide track 3238.

[0261] like Figure 69 As shown, the rotary hammer 3004 further includes a dust cover 3224 disposed within the dust duct. More specifically, the dust cover 3224 is coupled to the spindle 3034 of the chuck assembly 3036 via an interference fit. The spindle 3034 and the dust cover 3224 are configured to receive the tool bit 3032 and are configured to rotate together when the dust duct 3040 is secured. When the tool bit 3032 is inserted into the spindle 3034, the dust cover 3224 removes dust and debris from the tool bit 3032 during previous operations, preventing dust and debris from entering the main body 3016. The dust cover 3224 also seals the gap between the spindle 3034 and the transfer duct 3140 and is configured to rotate with the spindle 3034 to maintain a seal during operation. Therefore, dust generated during operation of the rotary hammer 3004 will not travel through the transfer duct 3140 and enter the air outside the main body 3016 or the dust ducts 2040, 3040. In the illustrated embodiment, the dust cover 3224 is made of nitrile rubber (NBR). In other embodiments, the dust cover 3224 can be made of other elastomers, such as silicone, polyurethane, neoprene, or a combination of elastomers.

[0262] Various features of the present disclosure are set forth in the following claims.

Claims

1. A handheld power tool, characterized in that: include: a housing comprising a front end, a rear end, a first side, and a second side; a tool receiving portion disposed on a front end of the housing, the tool receiving portion being configured to receive a handheld power tool; a motor positioned within the housing and operatively coupled to the tool receiving portion to drive the handheld power tool; a handle disposed on a rear end of the housing; a tube extending through at least a portion of the housing; as well as An auxiliary handle is selectively coupled to the housing, the auxiliary handle being at least partially insertable into the tube.

2. The handheld power tool according to claim 1, wherein: The tube extends across the entire width of the handheld power tool, and wherein the auxiliary handle is selectively insertable into the tube from a first side of the housing and selectively insertable into the tube from a second side of the housing.

3. The handheld power tool according to claim 1, wherein: The auxiliary handle is oriented orthogonal to the handle.

4. The handheld power tool according to claim 1, wherein: The auxiliary handle is movable between an extended position and a retracted position.

5. The handheld power tool according to claim 4, wherein: The auxiliary handle is insertable into the tube at a first depth corresponding to the extended position and is insertable into the tube at a second depth corresponding to the retracted position.

6. The handheld power tool according to claim 1, wherein: The auxiliary handle includes: a pin housing capable of being inserted into the tube; a handle supported on an end of the pin housing; a pin disposed within the pin housing and axially slidable within the pin housing between a locked position and an unlocked position; a ball disposed in a ball hole in the pin housing, the ball being movable in a radial direction between a locked position and an unlocked position; and An actuator is operable to unlock the pin and the ball.

7. The handheld power tool according to claim 6, wherein: Actuation of the actuator enables the pin housing to slide relative to the tube.

8. The handheld power tool according to claim 7, wherein: Further included is a biasing member configured to bias the pin toward the locked position and limit movement of the pin housing relative to the tube.

9. The handheld power tool according to claim 1, wherein: The handheld power tool further includes a dust collection assembly having a suction duct and a fan configured to generate an air flow through the suction duct.

10. An auxiliary handle for a handheld power tool, characterized in that: The auxiliary handle includes: a tube extending through a portion of the handheld power tool; a pin housing capable of being inserted into the tube; a handle supported on an end of the pin housing; and a locking mechanism configured to selectively lock the pin housing relative to the tube, the locking mechanism comprising: a pin disposed within the pin housing and axially slidable within the pin housing between a locked position and an unlocked position; a ball disposed in a ball hole in the pin housing, the ball being movable in a radial direction between a locked position and an unlocked position; and An actuator is operable to unlock the pin and the ball.

11. The auxiliary handle according to claim 10, wherein: The locking mechanism further includes a biasing member configured to automatically bias the pin and the ball toward the locked position.

12. The auxiliary handle according to claim 11, wherein: Actuation of the actuator overcomes the biasing force of the biasing member to enable movement of the pin housing relative to the tube.

13. The auxiliary handle according to claim 12, wherein: The actuator is positioned within a cavity in the handle, and wherein the actuator is configured to be depressed when actuated.

14. The auxiliary handle according to claim 10, wherein: The pin housing is lockable relative to the tube in a first position corresponding to an extended position, and wherein the pin housing is lockable relative to the tube in a second position corresponding to a retracted position.

15. The auxiliary handle according to claim 14, wherein: The tube includes a first receiving opening on a first end of the tube corresponding to the extended position, and wherein the tube includes a second receiving opening on a second end of the tube corresponding to the retracted position.

16. The auxiliary handle according to claim 10, wherein: The pin housing can be inserted into the tube from the right, and the pin housing can be selectively removed from the tube and inserted into the tube from the left.

17. A handheld power tool, characterized in that: include: a housing comprising a front end, a rear end, a first side, and a second side; a tool receiving portion disposed on a front end of the housing, the tool receiving portion being configured to receive a handheld power tool; a motor positioned within the housing and operatively coupled to the tool receiving portion to impart rotational motion on the tool receiving portion; a handle disposed on a rear end of the housing; a tube extending through at least a portion of the housing; as well as An auxiliary handle is insertable into the tube at a first depth corresponding to a retracted position and at a second depth corresponding to an extended position; the auxiliary handle is selectively insertable into the tube from a first side of the housing and a second side of the housing.

18. The handheld power tool according to claim 17, wherein: The auxiliary handle includes a pommel handle.

19. The handheld power tool according to claim 17, wherein: The auxiliary handle includes a locking mechanism configured to lock the auxiliary handle relative to the tube.

20. The handheld power tool according to claim 19, wherein: The locking mechanism includes a pin housing, a pin disposed within the pin housing and axially slidable within the pin housing between a locked position and an unlocked position, and an actuator operable to slide the pin between the locked position and the unlocked position.

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