Hand-held power tool

Abstract

A hand-held power tool for driving a grinding and cutting working tool ( 12 ) which is mounted on a drive spindle ( 13 ) projecting from the power tool housing ( 11 ), includes a locking and holding device ( 20 ) for releasably securing a protective hood ( 17 ), which at least partially covers the working tool ( 12 ) on the housing ( 11 ), with the holding device ( 20 ) having a clamping stirrup ( 22 ) for securing the protective hood ( 17 ), and a tensioning lever mechanism ( 21 ) with a tensioning lever ( 23 ) displaceable between a first position in which the clamping stirrup ( 22 ) is released and has a first stirrup width, and a second position in which the clamping stirrup is tensioned and has a second stirrup width smaller than the first stirrup width, and a locking spring ( 24 ) radially displaceable by the tensioning lever ( 23 ) and having at least one locking nose ( 25 ) for retaining the protective hood ( 17 ) on the housing ( 11 ) without a possibility of rotation relative thereto in the second position of the tensioning lever ( 23 ).

1 . A hand-held power tool for driving a cutting or grinding working tool ( 12 ), comprising a housing ( 11 ); a drive spindle ( 13 ) extending from the housing ( 11 ) for mounting the working tool ( 12 ) thereon; a protective hood ( 17 ) for at least partially covering the working tool ( 12 ) and securable on the housing ( 11 ); and a locking and holding device ( 20 ) for releasably securing the protective hood ( 17 ) on the housing and including a clamping stirrup ( 22 ) for securing the protective hood ( 17 ) and having a variable stirrup width, and a tensioning lever mechanism ( 21 ) having a tensioning lever ( 23 ) for operating the clamping stirrup ( 22 ) and displaceable between a first position in which the clamping stirrup ( 22 ) is released and has a first stirrup width, and a second position in which the clamping stirrup is tensioned and has a second stirrup width smaller than the first stirrup width, and a locking spring ( 24 ) radially displaceable by the tensioning lever ( 23 ) and having at least one locking hose ( 25 ) for retaining the protective hood ( 17 ) on the housing ( 11 ) without a possibility of rotation relative thereto in the second position of the tensioning lever ( 23 ). 
   
   
       2 . A hand-held power tool according to  claim 1 , wherein the clamping stirrup ( 22 ) and the tensioning lever mechanism ( 21 ) are fixedly secured on the housing ( 11 ), and wherein the protective hood ( 17 ) has counter-locking means ( 19 ) engageable, in the second position of the tensioning lever ( 23 ), by the at least one nose ( 25 ) of the locking spring ( 24 ) for retaining the protective hood ( 17 ) on the housing ( 11 ) without a possibility of rotation relative thereto. 
   
   
       3 . A hand-held power tool according to  claim 1 , wherein the tensioning lever mechanism ( 21 ) comprises a tensioning member ( 26 ) on which the locking lever ( 23 ) is arranged. 
   
   
       4 . A hand-held power tool according to  claim 1 , wherein the locking spring ( 23 ) is formed as a leaf spring. 
   
   
       5 . A hand-held power tool according to  claim 3 , wherein the locking spring ( 23 ) is formed integrally with the tensioning member ( 26 ). 
   
   
       6 . A hand-held power tool according to  claim 3 , wherein the locking spring ( 23 ) is formed as an elongate spring clip having two opposite end sides in a longitudinal direction of the spring clip and each having an opening ( 36 ) through which the tensioning element ( 26 ) is extendable. 
   
   
       7 . A hand-held power tool according to  claim 2 , wherein the counter-locking means ( 19 ) of the protective hood ( 17 ) is formed as locking teeth which together form mounting means ( 18 ) for mounting the protective hood ( 17 ) on a housing flange ( 16 ). 
   
   
       8 . A hand-held power tool according to  claim 2 , wherein the counter-locking means ( 19 ) comprises a plurality of counter-locking elements uniformly distributed on the protective hood ( 17 ).