Cooling attachment for a work machine

A device (400), comprising:

• a work machine (200) with a shaft (210), in which a rod-shaped tool (300) is guided with a rotary or hammering action, wherein the rod-shaped tool exits a free end of the shaft (210) of the work machine;
• and
• a cooling attachment (100), comprising
• a housing (110) with a housing shaft (112) for releasable mounting on the shaft (210) of the work machine,
• wherein the housing shaft has a free end (114) for at least partially enclosing the free end of the shaft of the work machine and the tool (300) exiting therefrom;
• a first cooling channel (120) extending in a longitudinal direction of the housing formed within the housing for conducting a coolant from an inlet opening (122) at an end (116) of the housing (110) close to the work machine to the free end of the housing shaft for cooling the rod-shaped tool (300);
• a second cooling channel (130) extending in the longitudinal direction of the housing (110) formed within the housing for conducting the coolant from the free end (114) of the housing shaft to at least one outlet opening (126), which is formed at the end (116) of the housing close to the work machine;
• and
• at least one connecting hole (150) at the free end of the housing shaft (112) between the first cooling channel (120) and the second cooling channel (130) for diverting the coolant from the first cooling channel (120) into the second cooling channel (130),
• wherein a radially inner wall of the second cooling channel (130) is formed by an outer wall of the work machine (200) and by an outer wall of the tool (300), where the tool (300) exits the shaft (210) of the work machine.

A method, comprising:

• providing
• a work machine (200) with a shaft (210), in which a rod-shaped tool (300) is guided with a rotary or hammering action, wherein the rod-shaped tool exits a free end of the shaft (210) of the work machine, and
• a cooling attachment (100), comprising
• a housing (110) with a housing shaft (112) for releasable mounting on the shaft (210) of the work machine,
• wherein the housing shaft has a free end (114) for at least partially enclosing the free end of the shaft of the work machine and the tool (300) exiting therefrom;
• a first cooling channel (120) extending in a longitudinal direction of the housing formed within the housing for conducting a coolant from an inlet opening (122) at an end (116) of the housing (110) close to the work machine to the free end of the housing shaft for cooling the rod-shaped tool (300);
• a second cooling channel (130) extending in the longitudinal direction of the housing (110) formed within the housing for conducting the coolant from the free end (114) of the housing shaft to at least one outlet opening (126), which is formed at the end (116) of the housing close to the work machine;
• and
• at least one connecting hole (150) at the free end of the housing shaft (112) between the first cooling channel (120) and the second cooling channel (130) for diverting the coolant from the first cooling channel (120) into the second cooling channel (130);
• and
• introducing the coolant through the inlet opening (122) in the housing (110) of the cooling attachment (100) into the first cooling channel (120),
• wherein the coolant is air, and
• wherein the coolant is directed through the first cooling channel onto the tool (300) exiting the shaft (210) of the work machine and is deflected there into the second cooling channel (130), for cooling the tool and the work machine (200) and for exiting the second cooling channel (130) from the at least one outlet opening (126) attached at the end (116) on a work machine side of the housing (110).