Sanding pad having a sealing element and a rib structure, and sanding machine

Abstract

A sanding pad ( 40 ) for a sanding machine ( 15 ), including comprising a drive holder ( 49 ), situated on the machine side ( 41 ) of the sanding pad, to be fastened in a non-rotatable manner to a drive ( 26 ) of the sanding machine ( 15 ), such that the sanding pad ( 40 ) can be driven by the sanding machine in an in particular rotational and/or eccentric sanding motion that is suitable for sanding a workpiece (W); wherein the sanding pad has a machining side ( 42 ), which is opposite the machine side ( 41 ) and has a machining face ( 45 ) on which a sanding means ( 90 ) for abrasive machining of a workpiece (W) can be arranged so as to be fixed or removable using an adhesive layer ( 66 ); wherein inflow openings ( 48 ) for dust-laden dirty air (S) to flow in are situated in the machining face ( 45 ), and outflow openings ( 43 ) fluidically connected to the inflow openings via through-channels ( 59 ) are situated on the machine side ( 41 ).

1 . A sanding pad for a sanding machine, comprising a drive holder, situated on a machine side of the sanding pad, to be fastened in a non-rotatable manner to a drive of the sanding machine, such that the sanding pad can be driven by the sanding machine; wherein the sanding pad comprises a machining side, which is opposite the machine side and has a machining face on which a sanding means for abrasive machining of a workpiece can be arranged so as to be fixed or removable using an adhesive layer, wherein inflow openings for dust-laden dirty air to flow in are situated in the machining face, and outflow openings fluidically connected to the inflow openings via through-channels are situated on the machine side; wherein the outflow openings are situated in a suction zone within an annular sealing element that is situated on the machine side for sealingly contacting a counter-sealing element of the sanding machine, wherein the sanding pad comprises a planar body which has a supporting wall provided for supporting the sanding means, which supporting wall is reinforced by a rib structure, the ribs of which project beyond the supporting wall towards the machine side, wherein the ribs delimit cavities which are closed by the supporting wall with respect to the machining side and are open with respect to the machine side, and wherein the sealing element covers at least some of the cavities towards the machine side. 
     
     
         2 . The sanding pad of  claim 1 , wherein the sealing element and the planar body are integral or the sealing element and the planar body are separate components which are fixedly connected to one another. 
     
     
         3 . The sanding pad of  claim 1 , wherein at least one cavity covered by the sealing element on the machine side is a demolding cavity formed by removing a casting core from the cavity. 
     
     
         4 . The sanding pad of  claim 1 , wherein the sealing element, except for the outflow openings, covers and/or tightly closes all cavities of the planar body within the suction zone and/or on a flat side of the planar body and/or between the drive holder and an edge region of the planar body. 
     
     
         5 . The sanding pad of  claim 1 , wherein the sealing element, except for the outflow openings, tightly closes at least a part of the cavities, so that a volume located in the respective cavity is closed dust-tight. 
     
     
         6 . The sanding pad of  claim 1 , wherein the sealing element covers and/or tightly closes at least one, multiple, or all of the cavities provided and configured to form one or more through channels and/or at least one or all through channels. 
     
     
         7 . The sanding pad of  claim 1 , wherein the sealing element rests flatly on the end faces of the ribs facing toward the sealing element. 
     
     
         8 . The sanding pad of  claim 1 , wherein the sealing element is connected by means of welding, and/or adhesive bonding to the planar body. 
     
     
         9 . The sanding pad of  claim 1 , wherein the sealing element and/or the planar body have at least one welding projection, for welding to the respective other component of the sealing element or planar body or are welded by means of the at least one welding projection to the respective other component of sealing element or planar body. 
     
     
         10 . The sanding pad of  claim 1 , wherein the planar body and the sealing element are supported on one another in a form-fitting manner in a force direction parallel to the working surface. 
     
     
         11 . The sanding pad of  claim 1 , wherein the sealing element is detachably arranged on the planar body. 
     
     
         12 . The sanding pad of  claim 1 , wherein the sealing element and the planar body are connected to one another in a form-fitting manner by at least one pairing of a form-fitting projection and a form-fitting receptacle which extend transversely, to the machining surface and interlock. 
     
     
         13 . The sanding pad of  claim 1 , wherein the sealing element has at least one support contour and/or a support rib projecting in front of the sealing element for lateral contact on a rib delimiting a cavity. 
     
     
         14 . The sanding pad of  claim 13 , wherein the sealing element has two support contours and/or welding projections spaced apart from one another, which are provided for contact on opposite ribs delimiting a cavity or delimit a receptacle for engaging a rib. 
     
     
         15 . The sanding pad of  claim 13 , wherein the at least one support contour or the at least one welding projection has at least two support contours or welding projections extending at an angle to one another, for support on ribs angled in relation to one another. 
     
     
         16 . The sanding pad of  claim 13 , wherein the at least one support contour or the at least one welding projection comprises a support frame for lateral contact on an inner circumference of a cavity delimited by ribs of the rib structure. 
     
     
         17 . The sanding pad of  claim 13 , wherein the at least one support contour forms or comprises a welding projection for thermal welding and/or ultrasonic welding of the sealing element to the planar body. 
     
     
         18 . The sanding pad of  claim 1 , further comprising a cover element which covers at least part of the cavities on the machine side. 
     
     
         19 . The sanding pad of  claim 18 , wherein the cover element is held on the planar body in a form-fitting manner and/or by means of the sealing element and/or by means of an adhesive bond and/or is integrally formed or fixedly connected with the sealing element or is formed by the sealing element. 
     
     
         20 . The sanding pad of  claim 18 , wherein the cover element has openings, for form-fitting elements, using which the sealing element and the planar body are fixed on one another in a form-fitting manner, and/or for engaging holding contours of the sealing element and/or for through-flow of dirty air and/or for the drive holder. 
     
     
         21 . The sanding pad of  claim 1 , wherein the sealing element and/or the or a cover element at least partially covering the cavities of the planar body, except for the outflow openings for the dirty air outside and/or inside the suction zone cover all cavities of the planar body on the machine side, which are closed between the machine side and the machining side or to an outer edge of the sanding pad with respect to an outer circumference of the planar body. 
     
     
         22 . The sanding pad of  claim 1 , wherein at least a part of the ribs of the planar body extend radially or radiating away from the drive holder to an edge region of the sanding pad. 
     
     
         23 . The sanding pad of  claim 1 , wherein at least a part of the ribs of the planar body extend to a common support plane, in which the ribs support the sealing element and/or the cover element. 
     
     
         24 . The sanding pad of  claim 1 , wherein the supporting wall of the planar body has recesses on the machining side to form the inflow openings and/or to provide at least partial portions of the through-channels. 
     
     
         25 . The sanding pad of  claim 1 , wherein the machining face of the sanding pad is provided directly by the supporting wall or a cover body having the machining face. 
     
     
         26 . The sanding pad of  claim 25 , wherein the cover body has or is formed by an elastic and/or resilient cushion body and/or the cover body covers the planar body on the machining side completely or except for an edge region which is remote from the drive holder and provided for reaching behind the sanding means and/or through-flow openings for dirty air and/or wherein the cover body has the sanding means or the adhesive layer for the detachable fastening of the sanding means on the sanding pad. 
     
     
         27 . The sanding pad of  claim 25 , wherein the cover body is detachably fastened on the planar body by means of fastening bolts. 
     
     
         28 . A cover body for a sanding pad or as part of a sanding pad, wherein the sanding pad comprises a machining side and has a machining face on which a sanding means for abrasive machining of a workpiece can be arranged so as to be fixed or removable using an adhesive layer, wherein inflow openings for dust-laden dirty air to flow in are situated in the machining face, and outflow openings fluidically connected to the inflow openings via through-channels are situated on the machine side; wherein the outflow openings are situated in a suction zone within an annular sealing element that is situated on the machine side for sealingly contacting a counter-sealing element of the sanding machine, wherein the sanding pad comprises a planar body which has a supporting wall provided for supporting the sanding means, which supporting wall is reinforced by a rib structure, the ribs of which project beyond the supporting wall towards the machine side, wherein the ribs delimit cavities which are closed by the supporting wall with respect to the machining side and are open with respect to the machine side, and wherein the sealing element covers at least some of the cavities towards the machine side, wherein the cover body is configured as a cushion and has a supporting wall body and a machining wall body, between which an elastic and/or resilient cushion body is held in a sandwich-like manner, wherein the supporting wall body and the machining wall body have flat sides facing away from one another, of which the flat side of the supporting wall body is provided and configured for contact on one or the planar body of the sanding pad and the flat side of the machining wall body contains a sanding means or an adhesive layer for the detachable fastening of a sanding means, wherein the machining wall body and the supporting wall body are connected to one another by a connecting device on an outer circumference of the cover body, so that the cushion body is protected against mechanical damage by the supporting wall body, the machining wall body, and the connecting device on the outer circumference of the cover body. 
     
     
         29 . The cover body of  claim 28 , wherein the supporting wall body and/or the machining wall body consist of material which is different and/or has higher tensile strength and/or is more impact-resistant and/or denser and/or harder than the cushion body. 
     
     
         30 . The cover body of  claim 28 , wherein the supporting wall body and/or the machining wall body consist of a textile material. 
     
     
         31 . The cover body of  claim 28 , wherein the connecting device comprises a seam or connecting bodies spaced apart from one another or is formed by a seam or connecting bodies spaced apart from one another, wherein the seam or the connecting bodies connect the supporting wall body and the machining wall body to one another, in particular directly. 
     
     
         32 . The cover body of  claim 28 , wherein the connecting device comprises a material bond or is formed by a material bond, wherein the material bond connects the supporting wall body and the machining body to one another. 
     
     
         33 . The cover body of  claim 28 , wherein the connecting device comprises at least one ring body which at least partially encloses the outer circumference of the cover body. 
     
     
         34 . The cover body of  claim 33 , wherein the at least one ring body has at least one peripheral wall portion overlapping the cushion body on the outer circumference of the cover body and/or has at least one leg portion on which a flat side of the supporting wall body or a flat side of the machining wall body or the planar body of the sanding pad is supported. 
     
     
         35 . The cover body of  claim 33 , wherein the at least one ring body clamps the machining wall body to the supporting wall body and/or the planar body and/or comprises ring bodies that are opposite to one another and are connected to one another, and between which the machining wall body and the supporting wall body are held in a sandwich-like manner 
     
     
         36 . The cover body of  claim 33 , wherein the at least one ring body is arranged in a sandwich-like manner between the supporting wall body and the machining wall body or has a section arranged between the supporting wall body and the machining wall body. 
     
     
         37 . The cover body of  claim 33 , wherein the ring body is elastic or has an elastic part and is deformable by a force acting on the machining wall body in the direction of the supporting wall body. 
     
     
         38 . The cover body of  claim 28 , further comprising a large-region central region in which the cushion body is arranged and around which the connecting device extends, and wherein in the central region there is no connection penetrating the cushion body between the machining wall body and the supporting wall body. 
     
     
         39 . The cover body of  claim 28 , wherein the machining wall body has a large-region central region in which the machining wall body projects farther in front of the supporting wall body than on the outer circumference of the cover body. 
     
     
         40 . The cover body of  claim 28 , wherein inflow openings for dirty air are arranged on the flat side of the machining wall body and are connected to outflow openings on the flat side of the supporting wall body via through-channels. 
     
     
         41 . The cover body of  claim 28 , wherein a cavity enclosed by the supporting wall body and the machining wall body is provided between the cushion body and the outer circumference of the cover body. 
     
     
         42 . A sanding machine having a drive motor for driving an output and having a sanding pad for fastening on the output, the sanding pad comprising a machining side and has a machining face on which a sanding means for abrasive machining of a workpiece can be arranged so as to be fixed or removable using an adhesive layer, wherein inflow openings for dust-laden dirty air to flow in are situated in the machining face, and outflow openings fluidically connected to the inflow openings via through-channels are situated on the machine side; wherein the outflow openings are situated in a suction zone within an annular sealing element that is situated on the machine side for sealingly contacting a counter-sealing element of the sanding machine, wherein the sanding pad comprises a planar body which has a supporting wall provided for supporting the sanding means, which supporting wall is reinforced by a rib structure, the ribs of which project beyond the supporting wall towards the machine side, wherein the ribs delimit cavities which are closed by the supporting wall with respect to the machining side and are open with respect to the machine side, and wherein, characterized in that the sealing element covers at least some of the cavities towards the machine side and/or having a sanding pad on which a cover body is arranged, the cover body being configured wherein the cover body is configured as a cushion and has a supporting wall body and a machining wall body, between which an elastic and/or resilient cushion body is held in a sandwich-like manner, wherein the supporting wall body and the machining wall body have flat sides facing away from one another, of which the flat side of the supporting wall body is provided and configured for contact on one or the planar body of the sanding pad and the flat side of the machining wall body contains a sanding means or an adhesive layer for the detachable fastening of a sanding means, characterized in that, wherein the machining wall body and the supporting wall body are connected to one another by a connecting device on an outer circumference of the cover body, so that the cushion body is protected against mechanical damage by the supporting wall body, the machining wall body, and the connecting device on the outer circumference of the cover body, wherein the sanding machine has a counter-sealing element for contact on the sanding pad and/or the sealing element of the sanding pad. 
     
     
         43 . The sanding machine of  claim 42 , wherein the counter-sealing element has an elastic ring body made of an elastic material. 
     
     
         44 . The sanding machine of  claim 43 , wherein at least one contact body provided for grinding contact on the sealing element and made of a material that is harder than the elastic material, is embedded in the ring body. 
     
     
         45 . The sanding machine of  claim 42 , further comprising it has an eccentric bearing device for eccentrically driving the sanding pad.