Quick-release fastener device formed of two connection parts, for attaching a tool to the end of the arm of a machine

Abstract

Quick-release fastener device for attaching a tool to an arm of a machine including a first part and a second part, the first part including a base plate having front and rear edges, a coupling hook or pin protruding from the lower face of the base plate, and a locking hook protruding from the upper face of the base plate. The second part includes a pin or hook to couple to the coupling hook or pin of the first part; a base plate; and a slidable locking plate, the locking hook of the first part passes through the slidable locking plate to hook to an edge of the opening once the locking plate has slid to lock the device. Two prominences, one right and one left, project from the front of the base plate of the first part.

1 . A quick-release fastener device for attaching a tool such as a bucket to the end of the arm of a machine such as a hydraulic shovel or the like, comprising a first connection part ( 1 ) intended to be attached to the bucket and a second connection part ( 2 ) intended to be attached to the arm, the first part ( 1 ) comprising a base plate ( 3 ) having a front edge ( 11 ) and a rear edge ( 10 ), a coupling hook ( 4 ,  5 ) or pin protruding from the lower face of the base plate ( 3 ) and a locking hook ( 6 ) protruding from the upper face of the base plate ( 3 ) on the rear side, the second part ( 2 ) comprising a pin ( 9 ) or hook intended to be coupled to the coupling hook ( 4 ,  5 ) or pin, as the case may be, of the first part ( 1 ), a base plate ( 30 ), and a slidably mounted locking plate ( 32 ) biased by spring means, the locking hook ( 6 ) of the first part ( 1 ) being intended to pass through a through-opening formed in the slidable locking plate ( 32 ) of the second part ( 2 ) in order to be hooked to an edge of the opening once the locking plate ( 32 ) has slid in order to ensure the locking of the quick-release fastener device, characterised in that two prominences ( 16 ,  17 ), one right and one left, project from the front of the base plate ( 3 ) of the first part. 
     
     
         2 . The device according to  claim 1 , characterised in that, when viewed in a longitudinal section from back to front, each prominence ( 16 ;  17 ) comprises an upper end portion that is curved, in particular in the form of a circular arc, having its concavity facing downwards. 
     
     
         3 . The device according to  claim 1 , characterised in that the two prominences ( 16 ,  17 ), one left and one right, end in two protuberances, one left and one right, respectively. 
     
     
         4 . The device according to  claim 3 , characterised in that, when viewed in a longitudinal section from back to front, each protuberance ( 16 ,  17 ) comprises, starting from the lower surface of the base plate ( 3 ), a curved end portion ( 18 ) having its concavity facing downwards, which is preceded by an intermediate curved portion ( 19 ) having its concavity facing upwards, which in turn is preceded by a rectilinear portion ( 20 ) that is vertical or substantially vertical, for example forming an angle of 5° to 10° with the vertical, and extends up to the upper face of the base plate ( 3 ). 
     
     
         5 . The device according to  claim 1 , characterised in that at the front end of the second connection part ( 2 ), two abutments ( 52 ,  53 ), one left and one right, project from the lower face of the base plate ( 30 ). 
     
     
         6 . The device according to  claim 5 , characterised in that at least one part of the rear face of each abutment comprises a surface whose shape is complementary to the upper end surface of each prominence such that the prominences and the abutments are in surface contact when the device is in the locking position. 
     
     
         7 . The device according to  claim 5 , characterised in that there is formed in each abutment a respective region ( 50 ,  51 ) having a surface whose shape is complementary to the upper end surface of the prominences of the first part such that said prominences are in surface contact with said regions when the device is in the locking position. 
     
     
         8 . The device according to  claim 5 , characterised in that the abutments of the second connection part each have a lower surface, each comprising two regions, namely an outer region and an inner region, the outer region ( 50 ,  51 ) having a surface whose shape is complementary to that of the upper end surface of the two prominences. 
     
     
         9 . The device according to  claim 8 , characterised in that the inner region is cuneiform. 
     
     
         10 . The device according to  claim 5 , characterised in that the two prominences ( 16 ,  17 ), one left and one right, end in two protuberances, one left and one right, respectively, and there is formed in each abutment ( 52 ,  53 ) a respective recess whose shape is complementary to that of the protuberances of the first part ( 1 ) such that said protuberances are received within said recesses when the device is in the locking position. 
     
     
         11 . The device according to  claim 10 , characterised in that each recess is open on the underside, laterally to the outside, and rearwards. 
     
     
         12 . The device according to  claim 10 , characterised in that when the protuberances are received in the recesses, the vertical inner side faces of the protuberances ( 16 ,  17 ) bear against a respective inner wall of the recesses. 
     
     
         13 . The device according to  claim 1 , characterised in that the front edge ( 11 ) of the base plate ( 3 ) of the first part ( 1 ) defines a notch ( 15 ), the two prominences ( 16 ,  17 ), one right and one left, being located on either side of the notch ( 15 ). 
     
     
         14 . The device according to  claim 1 , characterised in that the first connection part ( 1 ) comprises at least one rear tab ( 4 ,  5 ), in particular two rear tabs ( 4 ,  5 ), one left and one right, in the form of coupling hooks intended to be coupled to a pin ( 9 ) of the second connection part ( 2 ). 
     
     
         15 . A first connection part intended to be part of a quick-release fastener device for attaching a tool such as a bucket to the end of the arm of a machine such as a hydraulic shovel or the like, said device comprising the first connection part ( 1 ) intended to be attached to the bucket and a second connection part ( 2 ) intended to be attached to the arm, the first part ( 1 ) comprising a base plate ( 3 ) having a front edge ( 11 ) and a rear edge ( 10 ), a coupling hook ( 4 ,  5 ) or pin protruding from the lower face of the base plate ( 3 ), and a locking hook ( 6 ) protruding from the upper face of the base plate ( 3 ), the second part ( 2 ) comprising a pin ( 9 ) or hook intended to be coupled to the coupling hook ( 4 ,  5 ) or pin, as the case may be, of the first part ( 1 ), a base plate ( 30 ), and a slidably mounted locking plate ( 32 ) biased by spring means, the locking hook ( 6 ) of the first part ( 1 ) being intended to pass through a through-opening formed in the slidable locking plate ( 32 ) of the second part ( 2 ) in order to be hooked to an edge of the opening once the locking plate ( 32 ) has slid in order to ensure the locking of the quick-release fastener device, characterised in that two prominences ( 16 ,  17 ), one right and one left, project from the front of the base plate ( 3 ) of the first part ( 1 ). 
     
     
         16 . A second connection part intended to be part of a quick-release fastener device for attaching a tool such as a bucket to the end of the arm of a machine such as a hydraulic shovel or the like, said device comprising a first connection part ( 1 ) intended to be attached to the bucket and the second connection part ( 2 ) intended to be attached to the arm, the first part ( 1 ) comprising a base plate ( 3 ) having a front edge ( 11 ) and a rear edge ( 10 ), a coupling hook ( 4 ,  5 ) or pin protruding from the lower face of the base plate ( 3 ), and a locking hook ( 6 ) protruding from the upper face of the base plate ( 3 ), the second part ( 2 ) comprising a pin ( 9 ) or hook intended to be coupled to the coupling hook ( 4 ,  5 ) or pin, as the case may be, of the first part ( 1 ), a base plate ( 30 ), and a slidably mounted locking plate ( 32 ) biased by spring means, the locking hook ( 6 ) of the first part ( 1 ) being intended to pass through a through-opening formed in the slidable locking plate ( 32 ) of the second part ( 2 ) in order to be hooked to an edge of the opening once the locking plate ( 32 ) has slid in order to ensure the locking of the quick-release fastener device, characterised in that at the front end of the second connection part ( 2 ), two abutments ( 52 ,  53 ), one left and one right, project from the lower face of the base plate ( 30 ).