Quick-change system and adapter for such a quick-change system

Abstract

A quick-change system for changing attachments on a construction machine includes a quick changer and an adapter connectable thereto. The adapter contains coupling elements arranged at a predetermined spacing from each other between two side walls. The quick changer contains a support, first receptacles arranged on one side of support for receiving the first coupling element, second receptacles arranged on the other side of support for receiving the second coupling element, and a locking device with at least one locking element, which can be moved by a drive between a release position and a locking position for securely locking the second pin-like coupling element on the second receptacles. The quick-change system contains a mechanical safety device cooperating with the locking device of the quick changer, which has at least one locking element movable into a locking position for locking the at least one locking element in the locking position.

1 . A quick-change system for changing attachments on a construction machine, with a quick changer and an adapter connectable to the quick changer, in which the adapter contains coupling elements arranged at a predetermined spacing from each other between two side walls, and the quick changer has a support, first receptacles arranged on one side of support for receiving the first coupling element, second receptacles arranged on the other side of support for receiving the second coupling element and a locking device with at least one locking element movable by means of a drive between a release position and a locking position for securely locking the second pin-like coupling element on the second receptacles, wherein a mechanical safety device which cooperates with the locking device of the quick changer and which contains at least one locking element movable into a blocking position for locking the at least one locking element in the locking position. 
     
     
         2 . The quick-change system according to  claim 1 , wherein the at least one blocking element has a U-shaped cross section for engaging above a piston rod of the drive of the locking device. 
     
     
         3 . The quick-change system according to  claim 1 , wherein the at least one locking element comprises two locking elements connected to each other, which are movable between the locking position for locking two pin-like locking elements in an extended locking position, and a release position that enables the two pin-like locking elements to be moved between an extended locking position and a retracted release position. 
     
     
         4 . The quick-change system according to  claim 3 , wherein the two locking elements are connected to each other by a connecting rod. 
     
     
         5 . The quick-change system according to one of the  claim 1 , wherein the mechanical safety device is integrated into the adapter. 
     
     
         6 . An adapter for a quick-change system for changing attachments on a construction machine, which contains coupling elements arranged at a predetermined spacing from each other between two side walls for coupling to a quick changer provided with a locking device, wherein a mechanical safety device, which contains at least one locking element movable on an inside of the side wall between a lowered release position and a raised locking position for locking at least one locking element of the locking device. 
     
     
         7 . The adapter according to  claim 6 , wherein the locking element has a U-shaped cross section. 
     
     
         8 . The adapter according to  claim 6 , wherein the mechanical safety device contains two locking elements connected to each other and arranged on the inside of the two side walls, which can be moved between the lowered release position and the raised locking position. 
     
     
         9 . The adapter according to  claim 8 , wherein the two locking elements are arranged on actuation elements protruding outwardly relative to side walls and extending through slit-like openings in the side walls. 
     
     
         10 . The adapter according to  claim 9 , wherein a retaining device is arranged on at least one side wall for securing the two locking elements both in the lowered release position and the raised blocking position. 
     
     
         11 . The adapter according to  claim 10 , wherein the retaining device contains a retaining pin, which can be inserted through passage holes in at least one brace on the side wall and a passage hole in the actuation element. 
     
     
         12 . The adapter according to  claim 11 , wherein the retaining pin is secured by a locking pin.