Grinding machine with an external air inlet

Abstract

A grinding machine has a machine housing and a drive motor arranged therein, for rotating and/or oscillating drive of a tool holder to which a disk tool is releasably attachable. The machine has a disk tool cover delimiting a dust removal space in which the holder is arranged and which holds the tool when the tool is arranged on the holder. A dust removal connector through which a dust/air stream can flow is arranged on the space. A dust removal device is connectable to the connector. The dust/air stream conveys out of the space dust occurring during machine operation. Away, and separately, from the connector, at least one external air inlet for letting in external air is arranged on the space. The machine has a closure mechanism arranged on, or activated using, the device. The inlet is closable, at least in part, with the mechanism.

1 . A grinding machine ( 11 ) having a machine housing ( 15 ) and a drive motor ( 12 ) arranged in the machine housing ( 15 ), in particular an electric motor, for rotating and/or oscillating drive of a tool holder ( 14 ) to which a disk tool ( 90 ) can be releasably attached, wherein the grinding machine ( 11 ) has a cover ( 30 ) for the disk tool ( 90 ), which cover delimits a dust removal space ( 31 ) in which the tool holder ( 14 ) is arranged and which is provided and configured for holding the disk tool ( 90 ) when the disk tool ( 90 ) is arranged on the tool holder ( 14 ), wherein a dust removal connector ( 33 ) through which a dust/air stream can flow is arranged on the dust removal space ( 31 ), to which connector a dust removal device ( 50 ), in particular one forming a component of the grinding machine ( 11 ) or of a system comprising the grinding machine ( 11 ), in particular a suction hose ( 70 A) for connecting the grinding machine ( 11 ) to a vacuum cleaner (STA) or a dust collection device ( 70 ) can be connected, wherein the dust/air stream is provided for conveying away dust that occurs during operation of the grinding machine ( 11 ), out of the dust removal space ( 31 ), wherein away from and separately from the dust removal connector ( 33 ), at least one external air inlet ( 40 ) for letting in external air (F) is arranged on the dust removal space ( 31 ), and the grinding machine ( 11 ) has a closure mechanism ( 41 A,  41 B) that is arranged on the dust removal device ( 50 ) or can be activated by the dust removal device ( 50 ), with which mechanism the external air inlet ( 40 ) can be closed off, completely or at least in part. 
     
     
         2 . The grinding machine ( 11 ) according to  claim 1 , further comprising a dust/air wheel ( 32 ) for producing a dust/air stream, wherein the dust/air wheel ( 32 ) draws in external air (F) that flows through the external air inlet ( 40 ), to produce the dust/air stream, or is provided and configured for drawing in the external air through the external air inlet ( 40 ), to produce the dust/air stream. 
     
     
         3 . (canceled) 
     
     
         4 . The grinding machine ( 11 ) according to  claim 1 , wherein the external air inlet ( 40 ) is arranged directly next to the dust removal connector ( 33 ) and/or to the side next to the dust removal connector ( 33 ) and/or not on the dust removal connector ( 33 ). 
     
     
         5 . The grinding machine according to  claim 1 , wherein the dust removal connector ( 33 ) projects relative to the external air inlet ( 40 ) or beyond the external air inlet ( 40 ), so that a closure part ( 42 A) or activation part of the dust removal device ( 50 ), in particular of the dust collection device ( 70 ), can get in front of the external air inlet ( 40 ) when the dust removal device ( 50 ) is connected to the dust removal connector ( 33 ). 
     
     
         6 . The grinding machine according to  claim 1 , wherein the dust removal device ( 50 ), in particular the dust collection device ( 70 ), has a closure part ( 42 A) for closing off the external air inlet ( 40 ). 
     
     
         7 . The grinding machine according to  claim 1 , wherein the dust removal device ( 50 ) has a plug-in guide and/or a plug-in guide contour and/or an anti-rotation unit contour that leads to guiding the dust removal device ( 50 ) with reference to a plug-in axis, along which the dust removal device can be plugged onto the dust removal connector, configured in such a manner that a closure part ( 42 A), in the state of the dust removal device ( 50 ) when the dust removal device ( 50 ) is plugged onto the dust removal connector ( 33 ), lies opposite the external air inlet ( 40 ) and/or closes off the external air inlet ( 40 ), completely or at least essentially. 
     
     
         8 . The grinding machine according to  claim 1 , wherein the dust removal device ( 50 ) has a connection body ( 51 A,  51 B), in particular a tubular one, for a flow-tight connection to the dust removal connector ( 33 ), and the closure part ( 42 A) is arranged separately from the connection body ( 51 A,  51 B) and/or next to the connection body ( 51 A,  51 B). 
     
     
         9 . The grinding machine according to  claim 1 , wherein the external air inlet ( 40 ) is arranged next to the dust removal connector ( 33 ), in such a manner that the external air inlet ( 40 ) has a greater flow cross-section for external air (F) to flow through when a connection body ( 51 A,  51 B) of the suction hose ( 70 A) is connected to the dust removal connector ( 33 ) than when a connection body ( 51 A,  51 B) of the dust collection device ( 70 ) is connected to the dust removal connector ( 33 ). 
     
     
         10 . The grinding machine according to  claim 1 , wherein the dust collection device ( 70 ) is provided and configured for completely closing off the external air inlet ( 40 ), and/or the external air inlet ( 40 ) remains free when the suction hose ( 70 A) is connected, completely or essentially completely, for external air (F) to flow through. 
     
     
         11 . The grinding machine according to  claim 1 , wherein the closure mechanism ( 41 A,  41 B) has a closure link that is mounted on the grinding machine ( 11 ) or the dust collection device ( 70 ) so as to be adjustable, using a bearing mechanism, between an open position that releases the external air inlet ( 40 ) and a closed position that closes off the external air inlet ( 40 ), at least in part, wherein the bearing mechanism carries the closure link displaceably and/or so as to pivot, and wherein the closure link has a drive contour or is movement-coupled with a drive contour, which can be activated by the dust removal device ( 50 ) during connection to the dust removal connector ( 33 ) and/or during removal from the dust removal connector ( 33 ), so as to adjust the closure link between the open position and the closed position. 
     
     
         12 - 13 . (canceled) 
     
     
         14 . The grinding machine ( 11 ) according to  claim 1 , wherein the machine housing ( 15 ) has a handle ( 18 ), which projects to the rear, counter to a main working direction (HA) provided for regular machining of a workpiece using the grinding machine ( 11 ), wherein the dust removal connector ( 33 ) projects in the direction of the handle ( 18 ), beyond the machine housing ( 15 ), and/or wherein the external air inlet ( 40 ) is arranged on a rear side ( 20 ) of the machine housing ( 15 ), opposite to the main working direction (HA), and/or in the region of the handle ( 18 ). 
     
     
         15 . The grinding machine ( 11 ) according to  claim 1 , wherein the grinding machine ( 11 ) forms a component of a system that has the dust removal device, wherein the dust removal device comprises the or at least one closure mechanism ( 41 A,  41 B). 
     
     
         16 . The grinding machine ( 11 ) according to  claim 1 , wherein the machine housing ( 15 ), on a top side that faces away from the tool holder ( 14 ) or is opposite to the tool holder ( 14 ), has a support contour arrangement ( 28 ) having at least one support contour for setting the grinding machine ( 11 ) down, in a tilt-proof manner, with its top side, on a substratum. 
     
     
         17 . The grinding machine ( 11 ) according to  claim 16 , wherein the machine housing ( 15 ) has a longitudinal center plane ( 23 ) and the support contour arrangement ( 28 ) is configured and provided for tilt-proof support of the machine housing ( 15 ) with reference to the longitudinal center plane ( 23 ), and/or wherein the support contour arrangement ( 28 ) is configured and provided for tilt-free support of the machine housing ( 15 ) with reference to a longitudinal axis of the machine housing ( 15 ), wherein the longitudinal axis extends along the longest longitudinal expanse of the machine housing ( 15 ). 
     
     
         18 . The grinding machine ( 11 ) according to  claim 17 , wherein the support contour arrangement ( 28 ) comprises at least one support rib that extends transverse to a longitudinal center plane ( 23 ) of the machine housing ( 15 ) and/or a support projection that is transversely at a distance from the longitudinal center plane ( 23 ), in particular arranged on a handle ( 18 ) that projects away from a drive section of the machine housing ( 15 ), in the direction of the longitudinal center plane ( 23 ). 
     
     
         19 . The grinding machine ( 11 ) according to  claim 16 , wherein the support contour arrangement ( 28 ) comprises a handle section on the top side of the machine housing ( 15 ), which section is provided and configured for supporting the palm of an operator on the machine housing ( 15 ). 
     
     
         20 . The grinding machine ( 11 ) according to  claim 16 , wherein the support contour arrangement ( 28 ) comprises a support contour on a dust collection device ( 70 ) or the dust collection device ( 70 ) that is connected to the dust removal connector ( 33 ). 
     
     
         21 . The grinding machine ( 11 ) according to  claim 16 , wherein the support contour arrangement ( 28 ) has a support contour is arranged on an energy storage unit part of the machine housing ( 15 ) that comprises an energy storage unit connector ( 26 ) of the grinding machine ( 11 ), wherein at least one of the support contour and the energy storage unit part has a transverse distance from a longitudinal center plane ( 23 ) of the machine housing ( 15 ). 
     
     
         22 . The grinding machine ( 11 ) according to  claim 1 , further comprising a suction hose ( 70 A) that can be connected or is connected to the dust removal connector ( 33 ), wherein the external air inlet ( 40 ) is free when the suction hose ( 70 A) is connected to the dust removal connector ( 33 ), for external air (F) to flow through, or has a greater flow cross-section for external air (F) to flow through than when a connection body ( 51 A,  51 B) of the dust collection device ( 70 ) is connected to the dust removal connector ( 33 ). 
     
     
         23 . A dust removal device ( 50 ), in particular dust collection device ( 70 ), for use with the grinding machine ( 11 ) according to  claim 1 , wherein the dust removal device ( 50 ) has a closure mechanism ( 41 A,  41 B), in particular a closure part ( 42 A), for closing off the external air inlet ( 40 ) of the grinding machine ( 11 ).