Ice Drill

Abstract

A device is designed for optionally connecting a crank ( 3 ) and a motor shaft with a drill rod ( 2 ) of a tool for drilling holes through thick outdoor ice, on lakes and the like, by rotating the drill rod, for converting the tool between a tool for hand driven and a tool for motor driven drilling. The device has for this sake locking members for locking the crank and the motor shaft, respectively, to the drill rod, which are releasably arranged for removing the crank and the motor shaft, respectively, from the drill rod.

1 . A device for connecting a crank ( 3 ) with the drill rod ( 2 ) of a tool for drilling a hole though outdoor ice, on lakes and the like, by driving the crank by hand, which comprises means for establishing a connection of mutual insertion of a shaft ( 11 ) of said crank and an end ( 7 ) of the drill rod as well as first members ( 17 ) for interlocking them in this position,
 wherein said interlocking member is releasably arranged for removing the crank from the drill rod, that said means are adapted to optionally establish a connection of mutual insertion of a motor shaft ( 19 ) of a motor and said end of the drill rod instead of with the crank, and the device further comprises second members ( 21 ) designed for locking the motor shaft with respect to the drill rod in this position for converting the tool between a tool for hand operated drilling and one for motor driven drilling.   
     
     
         2 . A device according to  claim 1 , wherein said means are adapted to make locking of a said motor shaft ( 19 ) to said end ( 7 ) of a drill rod impossible without removing said first interlocking means ( 17 ). 
     
     
         3 . A device according to  claim 1 , wherein it comprises a hollow end ( 7 ) of a said drill rod with a cavity ( 8 ) designed to optionally receive a crank rod ( 9 ) of a said crank ( 3 ) as well as a said motor shaft ( 19 ) inserted thereinto for locking thereof with respect to the drill rod. 
     
     
         4 . A device according to  claim 3 , wherein the cavity ( 8 ) of said drill rod end has a circular cross-section. 
     
     
         5 . A device according to  claim 3 , wherein the cross-section of the cavity ( 8 ) of the drill rod end is larger than the outer cross-section of a crank rod ( 9 ) of a crank designed to be received inside said drill rod end, and that said crank rod is over a part thereof intended to be at least partially inserted into said cavity ( 8 ) for connecting the crank with a said drill rod provided with a circumferential plastic jacket ( 12 ) with a certain elasticity so that the crank rod with plastic jacket shall obtain substantially the same cross-section dimension as said cavity. 
     
     
         6 . A device according to  claim 1 , wherein said first and second locking members comprise transversal through-holes ( 14 ,  15 ,  13 ,  20 ) in the end ( 7 ) of a said drill rod, in a crank rod ( 9 ) of a said crank and in said motor shaft ( 19 ), that said locking members comprise male elements ( 17 ,  21 ), such as bolts, designed to be pushed through the holes when a said drill rod hole is covering a said crank rod hole or motor shaft hole for obtaining said interlocking, the drill rod has one or more first said holes ( 15 ) for locking the crank rod and one or more second holes ( 14 ) separated with respect to the first holes for locking the motor shaft, and that the first and second holes differs with respect to shape and/or size. 
     
     
         7 . A device according to  claim 6 , wherein the first ( 15 ) and second ( 14 ) holes have different sizes and have over at least parts thereof an inner thread for receiving said male elements ( 17 ,  21 ) with different diameters screwed thereinto for said locking of a crank rod ( 9 ) and a motor shaft ( 19 ) to the drill rod end ( 7 ). 
     
     
         8 . A device according to  claim 6 , wherein said second holes ( 14 ) in the drill rod intended for locking a motor shaft ( 19 ) are arranged closest to the end limitation ( 16 ) of the drill rod and said first holes ( 15 ) for locking the crank rod ( 9 ) are arranged on such a distance from said end limitation that a motor shaft inserted into the drill rod in the position for locking the motor shaft with respect to the drill rod projects beyond and covers said first holes for the crank rod and makes inserting of a said male element through the holes last mentioned impossible and the first holes ( 15 ) are unreachable for covering thereof by a said motor shaft hole ( 20 ). 
     
     
         9 . A device according to  claim 6 , wherein it comprises in said crank rod ( 9 ) a plurality of said holes ( 13 ) distributed over the length of the crank rod for locking the crank rod with the crank at different heights with respect to a drill rod. 
     
     
         10 . A device according to  claim 1 , wherein it comprises a handle ( 10 ) designed to be arranged externally of said drill rod end ( 7 ) for providing a hand grip when loosening and locking, respectively, crank ( 3 ) or motor ( 23 ) with respect to the drill rod. 
     
     
         11 . A tool for drilling a hole through thick outdoor ice, on lakes and the like, which comprises a central drill rod ( 2 ) with a spiral ( 5 ) extending therearound for lifting crushed ice formed when drilling, a carrier ( 6 ) secured to one end of the drill rod and having at least one cutting blade fixed with respect to the drill rod and extending substantially radially with a cutting edge for cutting and by that drilling into the ice when rotating the drill rod as well as a crank connected to the drill rod for drilling a rod through the ice by driving the crank by hand, wherein it comprises a device ( 4 ) according to  claim 1 . 
     
     
         12 . A device according to  claim 2 , wherein it comprises a hollow end ( 7 ) of said drill rod with a cavity ( 8 ) designed to optionally receive a crank rod ( 9 ) of said crank ( 3 ) as well as said motor shaft ( 19 ) inserted thereinto for locking thereof with respect to the drill rod. 
     
     
         13 . A device according to  claim 12 , wherein the cavity ( 8 ) of said drill rod end has a circular cross-section. 
     
     
         14 . A device according to  claim 13 , wherein the cross-section of the cavity ( 8 ) of the drill rod end is larger than the outer cross-section of a crank rod ( 9 ) of a crank designed to be received inside said drill rod end, and said crank rod is over a part thereof intended to be at least partially inserted into said cavity ( 8 ) for connecting the crank with a said drill rod provided with a circumferential plastic jacket ( 12 ) with a certain elasticity so that the crank rod with plastic jacket shall obtain substantially the same cross-section dimension as said cavity. 
     
     
         15 . A device according to  claim 12 , wherein the cross-section of the cavity ( 8 ) of the drill rod end is larger than the outer cross-section of a crank rod ( 9 ) of a crank designed to be received inside said drill rod end, and said crank rod is over a part thereof intended to be at least partially inserted into said cavity ( 8 ) for connecting the crank with a said drill rod provided with a circumferential plastic jacket ( 12 ) with a certain elasticity so that the crank rod with plastic jacket shall obtain substantially the same cross-section dimension as said cavity. 
     
     
         16 . A device according to  claim 4 , wherein the cross-section of the cavity ( 8 ) of the drill rod end is larger than the outer cross-section of a crank rod ( 9 ) of a crank designed to be received inside said drill rod end, and said crank rod is over a part thereof intended to be at least partially inserted into said cavity ( 8 ) for connecting the crank with a said drill rod provided with a circumferential plastic jacket ( 12 ) with a certain elasticity so that the crank rod with plastic jacket shall obtain substantially the same cross-section dimension as said cavity. 
     
     
         17 . A device according to  claim 16 , wherein said first and second locking members comprise transversal through-holes ( 14 ,  15 ,  13 ,  20 ) in the end ( 7 ) of a said drill rod, in a crank rod ( 9 ) of said crank and in said motor shaft ( 19 ), said locking members comprise male elements ( 17 ,  21 ), such as bolts, designed to be pushed through the holes when a said drill rod hole is covering said crank rod hole or motor shaft hole for obtaining said interlocking, the drill rod has one or more first said holes ( 15 ) for locking the crank rod and one or more second holes ( 14 ) separated with respect to the first holes for locking the motor shaft, and the first and second holes differs with respect to shape and/or size. 
     
     
         18 . A device according to  claim 15 , wherein said first and second locking members comprise transversal through-holes ( 14 ,  15 ,  13 ,  20 ) in the end ( 7 ) of a said drill rod, in a crank rod ( 9 ) of said crank and in said motor shaft ( 19 ), said locking members comprise male elements ( 17 ,  21 ), such as bolts, designed to be pushed through the holes when a said drill rod hole is covering said crank rod hole or motor shaft hole for obtaining said interlocking, the drill rod has one or more first said holes ( 15 ) for locking the crank rod and one or more second holes ( 14 ) separated with respect to the first holes for locking the motor shaft, and the first and second holes differs with respect to shape and/or size. 
     
     
         19 . A device according to  claim 14 , wherein said first and second locking members comprise transversal through-holes ( 14 ,  15 ,  13 ,  20 ) in the end ( 7 ) of a said drill rod, in a crank rod ( 9 ) of said crank and in said motor shaft ( 19 ), said locking members comprise male elements ( 17 ,  21 ), such as bolts, designed to be pushed through the holes when a said drill rod hole is covering said crank rod hole or motor shaft hole for obtaining said interlocking, the drill rod has one or more first said holes ( 15 ) for locking the crank rod and one or more second holes ( 14 ) separated with respect to the first holes for locking the motor shaft, and the first and second holes differs with respect to shape and/or size. 
     
     
         20 . A device according to  claim 13 , wherein said first and second locking members comprise transversal through-holes ( 14 ,  15 ,  13 ,  20 ) in the end ( 7 ) of a said drill rod, in a crank rod ( 9 ) of said crank and in said motor shaft ( 19 ), said locking members comprise male elements ( 17 ,  21 ), such as bolts, designed to be pushed through the holes when a said drill rod hole is covering said crank rod hole or motor shaft hole for obtaining said interlocking, the drill rod has one or more first said holes ( 15 ) for locking the crank rod and one or more second holes ( 14 ) separated with respect to the first holes for locking the motor shaft, and the first and second holes differs with respect to shape and/or size.