초록 ▼

The invention relates to a handheld tool, in particular a handheld saw, with an electric drive motor (12), a serially switched gearbox (13), and a movement converter (14) that converts the driven movement of the gearbox (13) into an axial to-and-fro movement of a lifting element (15) for driving a t

The invention relates to a handheld tool, in particular a handheld saw, with an electric drive motor (12), a serially switched gearbox (13), and a movement converter (14) that converts the driven movement of the gearbox (13) into an axial to-and-fro movement of a lifting element (15) for driving a tool (16), in particular a saw blade, inside a housing (11). The gearbox (13) and the movement converter (14) are combined into a gear unit (17). The gear unit (17) is within a robust, bending- and deformation-resistant gear housing (40), which is in turn inside the housing (11). The housing (11) is made of flexible plastic.

대표청구항 ▼

The invention claimed is: 1. A handheld power tool comprising: (a) a plastic housing having a handle part and another portion adjoining the handle part; (b) a linearly reciprocating tool; (c) an electric drive motor positioned in the housing and having a rotatable motor shaft that rotates around an

The invention claimed is: 1. A handheld power tool comprising: (a) a plastic housing having a handle part and another portion adjoining the handle part; (b) a linearly reciprocating tool; (c) an electric drive motor positioned in the housing and having a rotatable motor shaft that rotates around an axis that extends non-parallel, non-colinear and non-perpendicular to a direction of linear reciprocation of the tool; (d) a rotating gear positioned on the motor shaft; (e) a motion converter configured to convert rotary motion of the gear to axially linearly reciprocating motion of the tool; and (f) a metal gear box secured to, and positioned within, the housing; (i) the motion converter being positioned in the gear box; (ii) the gear box including a gear wheel therein having an eccentrically located projection which engages the motion converter; (iii) the motor shaft projecting into the gear box from the motor; (iv) a reciprocating rod projecting outwardly from the gear box at an obtuse angle to the motor shaft; (v) a slide bearing: (A) surrounding the reciprocating rod; (B) positioned in the gear box; and (C) inhibited from rotational motion in the gear box; and (vi) at least one pin positioned in the gear box, the at least one pin comprising: (A) a pin in the gear box engaging the slide bearing; and (B) a pin in the gear box limiting relative rotational motion between the slide bearing and the rod. 2. The handheld power tool as defined by claim 1, characterized in that the gearbox (40) is formed of aluminum. 3. The handheld power tool as defined by claim 1, characterized in that the gearbox (40) is in two parts and comprises a housing shell (41) and a housing cap (42) that covers the housing shell (41) and that is detachably connected to the housing shell (41). 4. The handheld power tool as defined by claim 1, characterized in that a ribbed body (44), which is embodied as a heat sink and as a mount that is resistant to bending and torsion for a an end plate (45) and is in one piece with the gearbox (40), is located on the gearbox (40) in a region below the motion converter (14). 5. The handheld power tool as defined by claim 1, characterized in that an electric switch (47) having an actuation member (48) coupled with an actuator (49) that protrudes from the housing (11), is located laterally beside the gear unit (17). 6. The handheld power tool as defined by claim 5, characterized in that the actuator (49) is located transversely offset with respect to a symmetrical mold parting plane (35) of two housing shells (33, 34) that together form the housing (11). 7. The handheld power tool as defined by claim 1, characterized in that the gear (13) has a crown gear wheel (20), meshing with a power takeoff pinion (18) of the drive motor (12), with a bearing bolt (21) which protrudes to one side and which by means of at least one deep-groove bearing (22, 23) is supported in the gearbox (40). 8. The handheld power tool as defined by claim 1, characterized in that the gear (13) has a fan wheel (36) driven by the motor (12) via the gear (13). 9. The handheld power tool as defined by claim 8, characterized in that the fan wheel (36) is located on the bearing bolt (21) of the crown gear wheel (20). 10. The handheld power tool as defined by claim 1, characterized in that the reciprocating rod (55) is connected to a clamping system (53) located on one end of the reciprocating rod (55) for interchangeably mounting the tool (16). 11. The handheld power tool as defined by claim 1, characterized in that at least one rechargeable battery (64), for supplying the drive motor (12) is received in the housing (11). 12. The handheld power tool as defined by claim 11, characterized in that the drive motor (12) and the at least one rechargeable battery (64) are received inside the first portion (65) of the housing (11), the portion acting as the handle part. 13. A handheld power tool according to claim 1 wherein: (a) the at least one pin includes a transverse pin. 14. A handheld power tool according to claim 13 wherein: (a) the transverse pin projects through a rod that engages the projection on the gear wheel. 15. A handheld power tool according to claim 1 wherein: (a) the tool is a saw blade. 16. A handheld power tool according to claim 1 including: (a) an end plate; and (b) a clamping system releaseably fastening the tool; the clamping system being positioned between the end plate and the gear box. 17. A handheld power tool according to claim 1 including: (a) an electric switch and electric monitoring device. 18. A handheld power tool comprising: (a) a housing (11) within which an electric drive motor (12), a gear (13) connected downstream of the drive motor, and a motion converter (14) that converts the power takeoff rotary motion of the gear (13) into an axially reciprocating working motion of a reciprocating element (15) for driving a tool (16) are located, the gear (13) and the motion converter (14) being combined into a gear unit (17), characterized in that the gear unit (17) comprising the gear (13) and motion converter (14) is located inside a gearbox (40) that is resistant to bending and torsion and that in turn is received in the housing (11); and that the housing (11) is formed of flexible plastic; (b) wherein the gear (13) has a fan wheel (36) driven by the motor (12) via the gear (13); and (c) wherein the fan wheel (36) is located on the bearing bolt (21) of the crown gear wheel (20). 19. A handheld power tool comprising: (a) a housing (11) within which an electric drive motor (12), a gear (13) connected downstream of the drive motor, and a motion converter (14) that converts the power takeoff rotary motion of the gear (13) into an axially reciprocating working motion of a reciprocating element (15) for driving a tool (16) are located, the gear (13) and the motion converter (14) being combined into a gear unit (17), characterized in that the gear unit (17) comprising the gear (13) and motion converter (14) is located inside a gearbox (40) that is resistant to bending and torsion and that in turn is received in the housing (11); and that the housing (11) is formed of flexible plastic; (b) a slide bearing (56), in which the reciprocating element (15) is supported and guided displaceably back and forth, located in the gearbox (40); and (c) a guide means (57, 58, 59) for guiding the reciprocating element (15), the guide means (57, 58, 59) being operative between the slide bearing (56) and the reciprocating element (15); and (d) wherein the guide means are formed of a nonround and/or angular cross-sectional shape of the reciprocating element (15) and a bore, penetrated by the reciprocating element, of the slide bearing (56). 20. The handheld power tool as defined by claim 19, characterized in that the connecting element (58) is formed of a cross pin (59), which engages the end, remote from the gear (13), of a connecting rod (26) of the motion converter (14) as well as the end of the reciprocating element (15) toward the motion converter (14). 21. The handheld power tool as defined by claim 19, characterized in that the longitudinal guides (57) of the slide bearing (56) have guide pins (61, 62) that are approximately parallel to one another, wherein the connecting element (58) is supported and guided between the guide pins (61, 62). 22. A handheld power tool comprising: (a) a housing (11) within which an electric drive motor (12), a gear (13) connected downstream of the drive motor, and a motion converter (14) that converts the power takeoff rotary motion of the gear (13) into an axially reciprocating working motion of a reciprocating element (15) for driving a tool (16) are located, the gear (13) and the motion converter (14) being combined into a gear unit (17), characterized in that the gear unit (17) comprising the gear (13) and motion converter (14) is located inside a gearbox (40) that is resistant to bending and torsion and that in turn is received in the housing (11); and that the housing (11) is formed of flexible plastic; (b) a slide bearing (56), in which the reciprocating element (15) is supported and guided displaceably back and forth, located in the gearbox (40); and (c) a guide means (57, 58, 59) for guiding the reciprocating element (15), the guide means (57, 58, 59) being operative between the slide bearing (56) and the reciprocating element (15); and (d) wherein the guide means are formed of longitudinal guides (57) on the slide bearing (56), which protrude from the slide bearing, and at least one connecting element (58), which engages the reciprocating element (15) and by means of which the motion converter (14) is connected on the power takeoff side to the reciprocating element (15) and which is supported and guided in the longitudinal and/or tranverse direction by means of the longitudinal guides (57).