Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B24—GRINDING; POLISHING
  • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
  • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
  • B24B55/06—Dust extraction equipment on grinding or polishing machines
  • B24B55/10—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided
  • B24B55/102—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided with rotating tools
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B24—GRINDING; POLISHING
  • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
  • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
  • B24B55/04—Protective covers for the grinding wheel
  • B24B55/045—Protective covers for the grinding wheel with cooling means incorporated
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B24—GRINDING; POLISHING
  • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
  • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
  • B24B55/04—Protective covers for the grinding wheel
  • B24B55/05—Protective covers for the grinding wheel specially designed for portable grinding machines
  • B24B55/052—Protective covers for the grinding wheel specially designed for portable grinding machines with rotating tools
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B24—GRINDING; POLISHING
  • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
  • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
  • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
  • B24B23/03—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor the tool being driven in a combined movement

Definitions

• the invention relates to a grinding machine with a machine housing and a drive motor, in particular an electric one, arranged in the machine housing for rotating and/or oscillatingly driving a tool holder to which a disc tool can be detachably fastened, wherein the grinding machine has a cover for the disc tool, which delimits a dust removal chamber in which the tool holder is arranged and which is provided and designed to receive the disc tool when the disc tool is arranged on the tool holder, wherein a dust removal connection through which a dust air stream flows is arranged on the dust removal chamber, to which a dust removal device, in particular a suction hose for connecting the grinding machine to a vacuum cleaner or a dust collection device, forming a component of the grinding machine or of a system comprising the grinding machine, can be connected, wherein the dust air stream is provided for conveying dust arising during operation of the grinding machine out of the dust removal chamber.
• Typical sanders allow a dust collection container, a suction hose or the like to be connected to their dust removal connection so that dust that is created, for example, when sanding a workpiece, can be discharged into the dust collection container or vacuumed up by the vacuum cleaner.
• a grinding machine of the type mentioned at the outset that at least one external air inlet for admitting external air is arranged on the dust removal chamber away from and separately from the dust removal connection, and the grinding machine has a closure device, arranged in particular on the dust removal device or actuatable by the dust removal device, with which the external air inlet can be closed completely or at least partially.
• a dust removal device in particular a dust collection device, for use with a grinding machine according to the invention serves, wherein the dust removal device has a closure device, in particular a closure part, for closing the external air inlet of the grinding machine.
• the dust removal device can advantageously be detachably attached to a dust removal connection of the grinding machine, for example plugged onto the dust removal connection.
• a fundamental concept of the present invention is that an external air inlet does not always have to remain open, but can be closed as needed. Particularly when operating with the dust collection container or a dust collection device, it is advantageous if the external air inlet is completely or at least partially closed or closable. However, when connecting the vacuum cleaner, for example, the suction hose, the external air inlet can remain open or be opened by the closure device, so that the vacuum cleaner can always draw in a certain amount of external air and no excessive negative pressure develops in the area of the dust removal connection or the vacuum cleaner.
• the grinding machine it is possible for the grinding machine to have multiple closure devices, for example, a closure device on the dust removal device and a closure device arranged on the machine housing. Therefore, if a closure device is described in the following description, this can be a closure device arranged on the grinding machine, in particular its machine housing, but also a closure device arranged on the dust removal device and/or forming a component of the dust removal device.
• the closure device could also be referred to as "at least one closure device.”
• the external air inlet can be adjusted to a predetermined, fixed extent using the closure device of the dust removal device, for example that a flow cross-section of the external air inlet is reduced by 50%, 60%, 70%, 80% or 90% by the closure device of the dust removal device, when this is arranged on the external air inlet.
• a further closure device, which is arranged on the grinding machine or its machine housing, can, for example, cause a further reduction of the flow cross-section.
• the The closure device arranged in the machine housing of the grinding machine has an adjustable valve member which can be adjusted between an open position and a closed position.
• the closure device is intended and/or designed to completely or partially close a flow cross-section of the external air inlet.
• a flow cross-section of the external air inlet can be closed completely or preferably to at least 90%, even more preferably to at least 95% or 97%, by the closure device in its closed position.
• the external air inlet can preferably be completely closed or hermetically closed using the closure device so that no external air can flow in through the external air inlet.
• the external air inlet is substantially but not completely closed by the closure device. It is thus possible for at least part of the external air inlet to be open to flow to such an extent that a small amount of external air can flow into the external air inlet.
• the closure device preferably makes it possible to cover and close the external air inlet by at least 80%, preferably at least 90%, even more preferably at least 95% or 98%.
• a maximum of 20%, preferably 15%, even more preferably 10%, and finally even more preferably 5% of a volume flow of external air can flow in through the external air inlet compared to an external air inlet not covered by the closure device. If the closure device closes and/or covers the external air inlet, for example, at least 80-95% less external air passes through the external air inlet than if the external air inlet is not closed or covered by the closure device.
• the closure device is advantageously designed such that it allows the amount of external air flowing through the external air inlet to be variably adjusted.
• the closure device can comprise a valve member that is adjustably mounted between an open position that releases the external air inlet and a closed position that at least partially or completely closes the external air inlet, for example, on the grinding machine and/or on the dust removal device.
• the external air inlet is arranged away from the dust air flow flowing through the dust removal connection and/or the external air inlet has no flow connection to the dust air flow flowing through the dust removal connection outside the dust removal chamber and/or the external air inlet is flow-connected to the dust removal connection via the dust removal chamber.
• the dust removal connection has a closed and/or fluid-tight flow connection to the dust removal chamber.
• the external air inlet has no flow connection to the dust extraction connection and/or the dust air flow flowing through it, except for a flow connection via the dust extraction chamber and/or the flow through the dust extraction chamber.
• the dust extraction chamber is directly connected to the Dust removal connection flow-connected without external air being able to flow into this flow path.
• the cover advantageously encloses the dust removal chamber circumferentially with respect to a rotation axis of the tool holder, around which the tool holder can be driven by the drive motor.
• the cover comprises a peripheral wall that extends circumferentially relative to the rotational axis of the tool holder.
• the dust removal connection and/or the external air inlet are preferably arranged on a peripheral wall.
• the external air inlet and the dust removal connection are advantageously not provided on an end face of the cover and/or on an end face of the peripheral wall, wherein the end face faces the disc tool or is opposite the disc tool when the disc tool is mounted on the tool holder.
• the grinding machine is designed such that the external air flowing through the external air inlet does not flow past an end face of the cover or peripheral wall or through a slot or gap between the disc tool and the cover or peripheral wall into the dust removal chamber.
• the dust removal chamber apart from the dust removal connection and the at least one external air inlet, is closed by the disc tool when the disc tool is arranged and/or mounted on the tool holder.
• the grinding machine advantageously has a dust impeller for generating a dust air flow or the dust air flow. It is therefore possible for the grinding machine to actively generate the dust air flow and, for example, convey it to the dust collection device.
• the dust impeller is, for example, a fan impeller.
• the dust impeller preferably has blades for generating an air flow.
• the dust impeller is preferably a radial fan impeller for generating a radial air flow or dust air flow.
• the dust impeller can also be an axial fan impeller for generating an axial air flow or dust air flow.
• the dust impeller can be a radial-axial fan impeller, which can generate both an axial and a radial air flow, or, for example, can generate an axial air flow in the sense of sucking in dust air from the disc tool, which the fan impeller can, for example, blow out radially in the direction of the dust removal connection or convey further.
• the dust air wheel is arranged, for example, in particular in a sandwich-like manner, between the drive motor on the one hand and the disc tool or the tool holder on the other hand.
• the grinding machine can preferably have an eccentric gear and/or a gear for generating a hypercycloidal movement of the tool holder or the like, which is driven or can be driven by the drive motor and drives or has the tool holder.
• the grinding machine can also provide an oscillating drive type for the tool holder or be configured as an oscillating drive.
• the grinding machine can, for example, have an oscillation gear that is driven or can be driven by the drive motor and drives or has the tool holder.
• the dust-generating air wheel advantageously draws in external air flowing through the external air inlet to generate the dust-generating air stream.
• the external air can flow in through the external air inlet and be conveyed further through the dust-generating air wheel.
• This external air then becomes dust-generating air, so to speak, by absorbing and/or entraining particles or dust generated during operation of the grinding machine, for example, when grinding a workpiece surface.
• the dust air wheel is preferably provided and designed to suck in external air through the external air inlet and/or to generate the dust air flow.
• the dust removal chamber is advantageously designed such that air flowing through the disc tool entrains particles from a processing side of the disc tool intended for processing a workpiece and flows out of the dust removal chamber as a dust air stream through the dust removal connection.
• the external air inlet is located directly next to the dust extraction connection and/or to the side of the dust extraction connection. This creates, for example, a compact arrangement of the dust extraction connection and external air inlet.
• the dust removal connection in particular an outlet opening of the dust removal connection, is further away from a center of the grinding machine and/or a rotational axis about which the tool holder is rotationally driven or rotatable than the at least one external air inlet, in particular an inlet opening of the external air inlet.
• a flow direction of the external air in the direction of the dust air wheel when the external air flows through the external air inlet or external air duct into a conveying area of the dust air wheel, is preferably oriented radially to a rotational axis of the dust air wheel or at an angle of maximum 20° or 30° obliquely to the rotational axis of the dust air wheel.
• a surface of a flow cross-section of an inlet opening flow-connected to the external air inlet, via which external air flows into a receiving chamber in which the dust air wheel is arranged, is preferably oriented radially to a rotational axis or the rotational axis of the dust air wheel or oriented at a maximum of 20° or 30° obliquely to the rotational axis of the dust air wheel.
• the direction of rotation of the dust air wheel and/or the arrangement of the external air inlet is designed such that the external air flowing in via the external air inlet flows over at least 180 degrees, preferably at least 270 degrees, more preferably at least 300 degrees of a rotation of the dust air wheel around its axis of rotation and/or by at least 180 degrees, preferably at least 270 degrees, more preferably at least 300 degrees, around the axis of rotation of the dust air wheel from the external air inlet in the direction of the dust removal connection.
• the external air flowing in via the external air inlet is pre-conveyed to the dust removal connection by a rotation of the dust air wheel by at least 340 degrees, even more preferably 350 degrees, and/or flows by at least 340 degrees, even more preferably 350 degrees, around the axis of rotation of the dust air wheel from the external air inlet in the direction of the dust removal connection.
• the closure part is preferably designed and/or intended to completely seal the external air inlet in an airtight manner when the closure part is arranged at the external air inlet.
• the closure section covers the external air inlet but does not seal it completely airtight or flow-tight, i.e. that although the closure section rests against the external air inlet or is arranged at it, a small amount of external air can still flow into the external air inlet, for example, through a gap or slit between the closure section and the external air inlet.
• the dust removal device for example the dust collection device, has a plug-in guide, in particular formed by the closure part or encompassing the closure part, and/or a plug-in guide contour and/or an anti-rotation contour, which prevents or at least limits rotation of the dust removal device with respect to a plug-in axis along which the dust removal device can be plugged onto the dust removal connection, and/or which is designed such that the closure part, when the dust removal device is plugged onto the dust removal connection, is opposite the external air inlet and/or closes the external air inlet completely or at least substantially.
• the plug-in guide or plug-in guide contour or anti-rotation contour ensures, for example, that the closure part is opposite the external air inlet when the dust removal device is arranged on the grinding machine.
• the dust removal device advantageously has a connecting body for a flow-tight connection to the dust removal connection.
• the closure section is arranged separately from the connecting body and/or adjacent to the connecting body.
• the connecting body is, for example, tubular or comprises a connecting pipe.
• the closure section is located away from the tubular body, i.e., the tubular body itself or the connecting body itself does not close the external air inlet, but the closure section arranged adjacent to the connecting body does.
• the dust removal device is designed as a dust collection device, it preferably has a first connecting body that is geometrically different from a second connecting body that forms a connecting body for the suction hose. While both connecting bodies, the dust collection device connecting body and the suction hose connecting body, can in principle be tubular or comprise tubular bodies, they can otherwise have different geometries. For example, the tubular body does not have a closure section or actuating section arranged on or next to it, whereas the connecting body of the dust collection container or the dust collection device has an actuating section and/or closure section.
• An advantageous concept provides, for example, that the external air inlet is arranged next to the dust removal connection in such a way that the external air inlet has a larger flow cross-section for the flow of external air when connecting a suction hose connection body or connection body of the suction hose than when connecting a dust collection device connection body or a connection body of the dust collection device.
• the dust collection device is preferably provided and configured to completely close and/or cover the external air inlet.
• the closure section is configured such that it completely closes or can close the external air inlet. If multiple external air inlets are present, the closure section is advantageously configured to completely close all or several external air inlets. However, several separate closure sections can also be provided on the dust collection device in order to completely or partially close several separate external air inlets individually.
• the closure member advantageously has a drive contour or is connected to a drive contour or is motion-coupled, which is driven by the dust removal device When connected to the dust extraction port and/or removed from the dust extraction port, it can be actuated to move the closure member between the open and closed positions.
• an actuating part is arranged on the dust collection device or on its connecting body, for example, so that the device can actuate the external air inlet by actuating the closure member. The actuating part engages the drive contour, for example, when the dust extraction device is connected to the dust extraction port.
• the dust removal connection is preferably tubular or has a discharge connection pipe or a discharge connection nozzle. It is also possible for the dust removal connection to be formed by a discharge connection nozzle or a discharge connection pipe.
• the connection nozzle or the connection pipe protrudes, for example, in front of the cover that defines the dust removal chamber.
• the flow direction of external air flowing through the external air inlet and the flow direction of a dust-laden air stream flowing through the dust removal connection preferably run transversely to each other. It is particularly advantageous if the flow directions are at right angles, approximately at right angles, or at an angle between 80 and 120 degrees to each other.
• the machine housing of the grinding machine advantageously has a handle which projects backwards in the opposite direction to a main working direction intended for regular processing of the wall section or a workpiece using the grinding machine.
• the dust removal connection advantageously protrudes in front of the machine housing in the direction of the handle and/or is oriented in the direction of the handle.
• the longitudinal axes of the handle and the dust removal connection are advantageously parallel to each other or have an angle of less than 30 degrees or less than 20 degrees.
• the at least one external air inlet is arranged below the handle and/or to the side next to the handle.
• An energy storage device for supplying electrical power to the grinding machine is advantageously arranged or can be arranged on the handle or next to the handle.
• An independent invention in connection with the preamble features of claim 1 represents what can also be considered an advantageous embodiment of the grinding machine and the hand-held power tool described above if the machine housing has a support contour arrangement with at least one support contour on an upper side facing away from or opposite the tool holder for securely placing the grinding machine with its upper side on a surface.
• the basic idea here is that the grinding machine can be placed on a surface, for example a workpiece surface, not only with the disc tool facing down, but also with its upper side. This makes changing tools, for example, particularly easy.
• the machine housing for example, has a longitudinal center plane, and the support contour arrangement is designed and provided to securely support the machine housing relative to the longitudinal center plane.
• the support contour arrangement has a support contour at three spaced-apart locations. At least two of the support contours are preferably spaced transversely relative to the longitudinal center plane. These two support contours, which have a transverse spacing, are preferably spaced longitudinally from one or two support contours arranged on the machine housing in the longitudinal extension of the longitudinal center plane relative to the two aforementioned support contours.
• the machine housing has, as a component of the support contour arrangement, at least one support rib extending transversely to a longitudinal center plane of the machine housing.
• a support rib can therefore have a longitudinal shape.
• the support contour arrangement has a support projection spaced transversely from the longitudinal center plane. It is of course advantageous if it has support projections spaced apart from one another on opposite sides of the longitudinal center plane.
• a support rib or a support projection is a handle that protrudes from a drive section of the machine housing in the direction of the longitudinal center plane.
• the drive motor for example, is located in the drive section.
• the support projection or support rib protrudes, for example, from a rounded or flat surface of the machine housing.
• a vertical axis of the grinding machine or hand-held power tool extending between the underside and the top side has essentially the same inclination to the surface in a state in which the grinding machine or hand-held power tool rests with its underside on a surface and in a state in which the grinding machine or hand-held power tool rests with its top side on the surface by means of the support contour arrangement, or has inclinations that differ from one another by a maximum of 20°. It is therefore possible for the grinding machine or hand-held power tool to have a slight inclination, for example 10° to 20° or the like, when placed on its top side on the surface. Nevertheless, the grinding machine or hand-held power tool is placed or can be placed on the surface with its top side in a manner that prevents it from tipping over.
• the support contour arrangement is preferably designed such that the support surfaces of all support contours lie in a common support plane. If the grinding machine is placed or supported on a surface forming a flat surface using the support contour arrangement, the support plane corresponds to the flat surface of the surface.
• the support contour arrangement is designed, for example, such that an energy storage device and/or battery pack arranged on the machine housing and/or a arranged dust removal device, in particular a dust collection container, does not protrude in front of the support plane or is arranged behind the support plane.
• the support contour arrangement is preferably further configured such that the machine housing can be placed on the ground using the support contour arrangement, regardless of whether an energy storage device or battery pack is arranged on the machine housing.
• the machine housing is not supported on a ground using an energy storage device or battery pack arranged on the machine housing, but rather using the support contour arrangement.
• the support contour arrangement is designed in such a way that the machine housing can be placed on a base solely by means of the support contour arrangement, without an energy storage device arranged on the machine housing having contact with the base.
• a hand-held power tool 10 is designed, for example, as a grinding machine 11.
• the hand-held power tool 10 has a drive motor 12, the output of which rotates about a motor axis M and drives a gear 13, for example an eccentric gear, oscillation gear or the like, which in turn drives a tool holder 14 rotationally and/or eccentrically and/or hypercycloidally.
• the drive motor 12 is an electric drive motor.
• the drive motor 12 has, for example, a stator 12A and a rotor 12B.
• the tool holder 14 rotates about a tool axis W or is driven or drivable in rotation about a tool axis W.
• the tool axis W and the motor axis M are eccentric to each other.
• the gear 13 is or comprises, for example, an eccentric gear or eccentric bearing 13A.
• the drive motor 12 and the gear 13 form a drive train 13B or at least parts of a drive train 13B, which is accommodated in a machine housing 15 of the hand-held power tool 10.
• the hand-held power tool 10 is a hand-held power tool, or one that is to be guided or guided manually by an operator. Accordingly, the operator can freely guide the hand-held power tool along a workpiece surface WO, for example, forward in a main working direction HA or backward against the main working direction HA or transverse to the main working direction HA.
• the machine housing 15 has a drive section 16 that houses the drive motor 12 and the transmission 13, thus the drive train.
• the drive section 16 has, for example, a motor mount 16A for accommodating the drive motor 12.
• the handle section 17 or the Hand rest is suitable for grasping with one hand of an operator and/or for supporting one hand of an operator.
• a handle 18 protrudes from the drive section 16, for example, opposite to the main working direction HA.
• the handle section 17 and the handle 18 are arranged, for example, on a front section or front side 19 and a rear section or rear side 20 of the machine housing 15 with respect to the main working direction HA.
• the tool holder 14 and/or the tool axis W and/or the motor axis M are located approximately in the region of a longitudinal center plane 23 extending from the front 19 to the rear 20 of the handheld power tool 10.
• the handle section 17 is arranged on an upper side 24 of the handheld power tool 10, while the tool holder 14 is arranged on a lower side 25 opposite the upper side 24.
• the lower side 25 is provided for guiding the handheld power tool 10 along the workpiece surface WO or is opposite the workpiece surface WO during operation of the handheld power tool 10.
• the hand-held power tool 10 is preferably a battery-operated or rechargeable hand-held power tool.
• the concepts explained below regarding dust removal, drive train design, and optimized attachment or a dust collection device could also be readily implemented in a mains-powered hand-held power tool.
• the hand-held power tool 10 would have, for example, a connecting cable for connection to a power supply network.
• the energy storage connection 26 is provided, for example, on a holding section 26A of the machine housing 15.
• the holding section 26A extends between the drive section 16 and an end region of the handle 18 remote from the drive section 16.
• a through-opening 18A is provided between the handle 18 and the holding part 26A. A hand grasping the handle 18 can engage the through-opening 18.
• the tool holder 14 is arranged within and/or below a cover 30, which extends from the drive section 16 to the underside 25 of the hand-held power tool 10.
• the cover 30 defines a dust removal chamber 31, which is provided for collecting and removing dust generated during the machining of the workpiece surface WO.
• a disc tool 90 in particular a grinding tool, can be releasably attached to the tool holder 14.
• the disc tool 90 has, for example, a drive holder 91.
• the drive holder 91 and the tool holder 14 comprise, for example, bayonet contours/or rotary drive contours and/or a screw connection or the like.
• the disc tool 90 has a processing surface 92, for example, a grinding surface or polishing surface, wherein the grinding surface can also be formed by an abrasive that can be detachably attached to the disc tool 90.
• Inlet openings 93 into which air can flow are arranged on the processing surface 92.
• a dust-laden air stream i.e., a dust air stream S
• a dust air stream S can flow through the inlet openings 93 toward the dust removal chamber 31, wherein the dust air stream S can flow out through outlet openings 94, which are fluidly connected to the inlet openings 93, on a mounting side 95 of the disc tool 90 opposite the processing surface 92 and intended for mounting on the handheld power tool 10.
• An annular seal 31A or sealing sleeve surrounds the dust removal chamber 31.
• the seal 31A is held, for example, by the machine housing 15 and rests against the mounting side 95 of the disc tool 90.
• the outlet openings 94 are arranged in an interior space surrounded by the seal 31A.
• the dust removal chamber 31 it is possible for the dust removal chamber 31 to be vacuumed, for example, using an STA vacuum cleaner. In this case, actively generating a dust air flow by the hand-held power tool 10 is not necessary, but possible.
• the hand-held power tool 10 or grinding machine 11 has an active generation of the dust air flow or is designed to actively generate the dust air flow.
• a dust air wheel 32 Arranged within the dust removal chamber 31 is a dust air wheel 32, which is driven or drivable by the drive motor 12.
• the dust air wheel 32 is arranged at the output of the drive motor 12.
• the dust air wheel 32 can support the dust air flow S even when the vacuum cleaner STA is connected to the dust removal connection 33.
• the dust air wheel 32 thus generates a dust air flow S or supports its flow.
• the dust air wheel 32 is rotationally fixedly connected to a motor shaft 12C of the drive motor 12, which represents the output of the drive motor 12.
• the drive motor 12 or the motor shaft 12C rotates in a direction of rotation DR.
• the dust air wheel 32 rotates in the direction of rotation DR, so that the dust air flow S flows through the dust removal chamber 31 with the direction of rotation DR and flows into the dust removal connection 33.
• the dust air wheel 32 and optionally the vacuum cleaner STA generate an air flow that sucks in particles, dust or the like, which arise, for example, during the machining of the workpiece surface WO, through the inlet openings 93 of the disc tool 90.
• the dust air flow S thus generated flows out of the outlet openings 94 into the dust removal chamber 31, where the dust air wheel 32 conveys it further in the direction of the dust removal connection 33.
• the dust removal connection 33 is designed, for example, as a removal connection pipe 34 or a removal connection nozzle 35 or has a connection pipe 34 or a connection nozzle 35.
• the dust removal connection 33 is advantageously arranged off-center with respect to the longitudinal center plane 23, for example close to the longitudinal side 23.
• the dust air or the dust air flow S flows out of the dust removal chamber 31 eccentrically to the tool axis W and tangentially to the same.
• a dust removal device 50 can be connected to the dust removal connection 33.
• the hand-held power tool 10 or grinding machine 11 can also be operated without a dust removal device 50, in which case the dust air flow S is blown out into the environment via the dust removal connection 33.
• the dust removal device 50 is, for example, a dust removal device 50A in the form of a suction hose 70A or a dust removal device 50B in the case of a dust collection device 70.
• Both dust removal devices 50A and 50B can collect dust flowing through the dust removal port 33.
• the STA vacuum cleaner can collect dust.
• the dust collection device 70 can collect dust.
• Both dust removal devices 50A and 50B can be optionally connected to the dust removal connection 33 and have a tubular connection body 51A or 51B for this purpose.
• the connection bodies 51A or 51B can be plugged along a plug-in axis ST onto the dust removal connection 33, for example the removal connection pipe 34, or removed from the dust removal connection 33 by a pulling movement.
• Both dust removal devices 50A and 50B are sometimes also generally referred to as dust removal device 50 in the following description.
• connecting bodies 51A, 51B are also generally referred to as connecting bodies 51, in particular when the same or similar components are present in both dust removal devices 50A, 50B or connecting bodies 51A, 51B.
• the connecting bodies 51A and 51B are equipped with clamping devices 52 with which the dust removal devices 50A and 50B can be clamped to the dust removal connection 33.
• An external air duct 40A extends along the rear side 20 of the machine housing 50 and/or the rear side of the dust removal chamber 31, at which the external air inlet 40 is located.
• the external air inlet 40 and an inlet opening 40B for the flow of external air F into a receiving chamber 32A, in which the dust air wheel 32 is located, are fluidly connected to one another via the external air duct 40A.

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• 2025
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