Hand-held power tool hammer mechanism

Abstract

A hand-held power tool hammer mechanism, having a hammer device, can be driven by a piston via a gas volume. The hammer device has at least one decoupling element, which is provided for dimensionally decoupling a main hammer body of the hammer device, and has a coupling between the decoupling element and the main hammer body, which is provided to couple the main hammer body to the decoupling element in an at least largely synchronous fashion during a flight phase of the main hammer body.

1 . A hand-held power tool hammer mechanism, comprising a hammer device having a main hammer body; means forming a gas volume; a piston driving said hammer device via said gas volume, said hammer device having at least one decoupling means provided for dimensionally decoupling said main hammer body of said hammer device, and a coupling between said decoupling means and said main hammer body for coupling said main hammer body to said decoupling means in an at least largely synchronous fashion during a flight phase of said main hammer body.  
   
   
       2 . A hand-held power tool as defined in  claim 1;  and further comprising guide means for said hammer device, said decoupling means being configured to at least partially decouple an outer dimension of said main hammer body from said guide means.  
   
   
       3 . A hand-held power tool as defined in  claim 1 , wherein said decoupling means is composed of a lighter material than said main hammer body.  
   
   
       4 . A hand-held power tool as defined in  claim 1 , wherein an element selected from the group consisting of said coupling, said decoupling means, and both is configured to exert an at least partial vibration-damping action.  
   
   
       5 . A hand-held power tool as defined in  claim 1 , wherein said coupling includes at least one connection which is configured as a vulcanized-in-place connection.  
   
   
       6 . A hand-held power tool as defined in  claim 1 , wherein said decoupling means has at least one guide surface.  
   
   
       7 . A hand-held power tool as defined in  claim 6 , wherein said decoupling means has another such guide surface, so that said guide surfaces are spaced from each other in an axial direction.  
   
   
       8 . A hand-held power tool as defined in  claim 1 , wherein said hammer device has at least one guide rib.  
   
   
       9 . A hand-held power tool as defined in  claim 1 , wherein said hammer device is configured as a stepped hammer device.  
   
   
       10 . A hand-held power tool as defined in  claim 1 , wherein a hammer mechanism characteristic value which is composed of a maximum device surface dimension cubed and divided by a hammer device mass is greater than 200 mm 3 /g.  
   
   
       11 . A hand-held power tool as defined in  claim 10 , wherein the hammer mechanism characteristic value which is composed of a maximum device surface dimension cubed and divided by a hammer device mass is greater than 220 mm 3 /g.  
   
   
       12 . A hand-held power tool as defined in  claim 10 , wherein the hammer mechanism characteristic value which is composed of a maximum device surface dimension cubed and divided by a hammer device mass is greater than 240 mm 3 /g.  
   
   
       13 . A hand-held power tool as defined in  claim 1 , wherein a hammer mechanism characteristic value which is composed of a maximum device surface dimension cubed and divided by a hammer device mass is greater than 280 mm 3 /g.  
   
   
       14 . A hand-held power tool as defined in  claim 13 , wherein the hammer mechanism characteristic value is greater than 320 mm 3 /g.  
   
   
       15 . A hand-held power tool as defined in  claim 13 , wherein the hammer mechanism characteristic value is greater than 380 mm 3 /g.  
   
   
       16 . A hand-held power tool as defined in  claim 1 , wherein a hammer mechanism characteristic value which is composed of a maximum device surface dimension cubed and divided by a hammer device mass is less than 2000 mm 3 /g.  
   
   
       17 . A hand-held power tool as defined in  claim 1 , wherein said gas volume has a maximum gas pressure during operation which is less than 10 bar.  
   
   
       18 . A hand-held power tool as defined in  claim 17 , wherein said gas volume has the maximum gas pressure during operation which is less than 6 bar.  
   
   
       19 . A hand-held power tool as defined in  claim 1;  and further comprising an eccentric drive mechanism supported at one end.  
   
   
       20 . A hand-held power tool as defined in  claim 1;  and further comprising a hammer mechanism transmission composed exclusively of spur gear teeth.  
   
   
       21 . A hand-held power tool as defined in  claim 1;  and further comprising at least one control opening provided for controlling the gas volume and coupled to a motor compartment.  
   
   
       22 . A hand-held power tool, comprising a hand-held power tool hammer mechanism including a hammer device having a main hammer body; means forming a gas volume; a piston driving said hammer device via said gas volume, said hammer device having at least one decoupling means provided for dimensionally decoupling said main hammer body of said hammer device, and a coupling between said decoupling means and said main hammer body for coupling said main hammer body to said decoupling means in an at least largely synchronous fashion during a flight phase of said main hammer body.