초록 ▼

An electrically driven hand-held tool including a housing (2; 12; 22; 32), an electromotor (20; 30; 40), a gear set for transmitting rotation of an output shaft of the electromotor to a drive spindle, and a fan-wheel all arranged in the housing (2; 12; 22; 32), with the fan-wheel providing, during o

An electrically driven hand-held tool including a housing (2; 12; 22; 32), an electromotor (20; 30; 40), a gear set for transmitting rotation of an output shaft of the electromotor to a drive spindle, and a fan-wheel all arranged in the housing (2; 12; 22; 32), with the fan-wheel providing, during operation of the tool, for aspiration of air through the suction openings (6; 16; 26; 36) formed in the housing for directing the aspirated air past the electromotor and the gear set for cooling same, and for expelling warm air, which was heated as a result of absorbing heat generated by the electromotor and the gear set during the operation of the tool, out of the housing (2; 12; 22; 32), and a warm air channel (7; 17; 27; 37) arranged downstream of the electromotor and the gear set and spaced from a tool handle (3; 13; 23; 33) and having a plurality of blow-out openings (8; 18; 28; 38) arranged in such a way that during use of the hand-held tool, the expelled warm air flows in a direction away from the tool operator.

대표청구항 ▼

1. An electrically driven hand-held tool, comprising a housing (2; 12; 22; 32) having a plurality of air suction openings (6; 16; 26; 36), and electromotor (20; 30; 40), a gear set for transmitting rotation of an output shaft of the electromotor to a drive spindle, and a fan-wheel all arranged in th

1. An electrically driven hand-held tool, comprising a housing (2; 12; 22; 32) having a plurality of air suction openings (6; 16; 26; 36), and electromotor (20; 30; 40), a gear set for transmitting rotation of an output shaft of the electromotor to a drive spindle, and a fan-wheel all arranged in the housing (2; 12; 22; 32), the fan-wheel providing, during operation of the tool, for aspiration of air through the suction openings (6; 16; 26; 36), for directing the aspirated air past the electromotor and the gear set for cooling same, and for expelling warm air, which was heated as a result of absorbing heat generated by the electromotor and the gear set during the operation of the tool, out of the housing (2; 12; 22; 32); and means for directing the warm air out of the housing (2; 12; 22; 32); the directing means comprising a warm air channel (7; 17; 27; 37) arranged downstream of the electromotor and the gear set and spaced from a tool handle (3; 13; 23; 33) and having a plurality of blow-out openings (8; 18; 28; 38) arranged in such a way that during use of the hand-held tool, the expelled warm air flows in a direction away from the tool operator. 2. A hand-held tool according to claim 1, wherein the electromotor (20; 30) is arranged in the housing substantially horizontally, with respect to a drive spindle axis, and wherein the tool further comprises a hand protecting member (10) spaced from the tool handle (3; 13; 23) and extending from the housing (2; 12; 22) to the handle (3; 13; 23), the warm air channel (7; 17; 27) is provided in the hand protecting member (10), and the blow-out openings (8; 18; 28) are provided on a side of the hand protecting member (10) remote from the handles (3; 13; 23). 3. A hand-held tool according to claim 2, wherein the hand protecting member is formed as a separate part releasably connected with the housing. 4. A hand-held tool according to claim 1, wherein the warm air channel (17; 27; 37) is provided at least partially, with noise suppression means. 5. A hand-held tool according to claim 4, wherein the noise suppression means comprises baffle plates (19) projecting from an inner wall of the warm air channel (17). 6. A hand-held tool according to claim 1, wherein the air suction openings (6; 16; 26; 36) are formed in a section of the housing (2; 12; 22; 30) which, during an intended use of the tool, is spaced from a workpiece by a largest possible distance.