HAND-OPERATED WORK TOOL

Description

[0001] The invention relates to a hand-held work device according to the preamble of claim 1.

[0002] From DE 10 2005 016 628 A1, a hand-held brushcutter is known which has a housing for a motor to which a handle is integrally molded. The housing rests against the guide tube at two mounting points. Rubber sleeves may be provided at these mounting points. To stiffen the housing halves, the motor is rigidly connected to the housing. The housing can wear out, especially after frequent use of the tool.

[0003] DE 10 2018 000 975 A1 relates to a brushcutter with a handle attached to its guide tube. By dividing the guide tube into two rigid sections, the vibration pattern of the guide tube is modified so that the antinode of the vibration is not located in the area of ​​the handle. An anti-vibration element is arranged between the rigid section of the guide tube and the housing.

[0004] From EP 1 733 613 B1, a brushcutter with a guide tube is known, the motor of which is arranged in a housing to which the handle is attached. The motor is vibration-isolated from the housing by means of springs.

[0005] The invention is based on the objective of further developing a generic hand-held work device in such a way that the work device has a long service life.

[0006] This problem is solved by a hand-held tool having the features of claim 1.

[0007] The invention is based on the finding that, in the prior art, the housing wears down due to motor vibrations. The invention provides a second anti-vibration element that connects the motor to the housing, at least indirectly, in a vibration-isolated manner. This protects the housing from the transmission of motor vibrations, which causes wear. Consequently, the handheld tool exhibits a long service life. In particular, the motor is connected to the housing exclusively via anti-vibration elements. This ensures that vibrations from the motor are either dampened or not transmitted to the housing at all. If only one anti-vibration element were provided, it would have to be extremely hard to guarantee the necessary tolerances for the relative position of the guide tube and the housing.If a single anti-vibration element is too weak, the housing would buckle significantly relative to the guide tube and could potentially be damaged. If a single anti-vibration element is too strong, the damping effect is minimal, and vibrations transmitted from the motor, for example, via the guide tube and the damping element to the housing, could contribute to housing wear. The second anti-vibration element between the motor and the housing provides good protection for the housing. Both anti-vibration elements can be designed with a softer feel, resulting in strong vibration damping. Due to the low transmission of vibrations to the housing, hardly any vibrations are transmitted to the user when the housing is touched. In particular, a handle for carrying and / or guiding the tool can be attached to the housing. The handle can be permanently fixed to the housing.

[0008] Due to the housing's excellent vibration isolation, the tool operates quietly. The housing emits little to no sound, contributing minimally or not at all to the overall noise level of the tool. This minimal mass, preventing sound radiation, allows the housing to be very lightweight, resulting in significant weight savings. Furthermore, the use of lighter and / or less expensive materials is possible.

[0009] In an advantageous embodiment of the invention, the second anti-vibration element is arranged at a longitudinally measured distance from the first anti-vibration element. This distance between the two anti-vibration elements allows them to be designed with less vibration while still providing sufficient support for the housing. Because the two anti-vibration elements can be designed with less vibration, they can dampen vibrations more effectively. This increases the service life of the machine. The housing has a longitudinally measured length. The longitudinal direction is the direction in which the guide tube extends at its entry point into the housing. In particular, the longitudinal direction corresponds to the direction of a tangent to the guide tube at its entry point. Specifically, the longitudinal direction corresponds to the direction in which a drive shaft of the motor extends. The housing has a longitudinally measured length.Advantageously, the element spacing is at least 30%, and in particular at least 40%, of the housing length. This allows the first and second anti-vibration elements to be positioned in such a way that the housing is well supported against the guide tube, while simultaneously enabling a high damping effect from the anti-vibration elements, since both anti-vibration elements can be designed to be soft.

[0010] Preferably, the second anti-vibration element connects the guide tube to the housing in a vibration-isolated manner, at least indirectly. This vibration decoupling of the guide tube and housing protects the housing from wear caused by contact with the guide tube, and in particular from vibrations transmitted from the guide tube to the housing.

[0011] Advantageously, the second anti-vibration element is positioned on the side of the motor facing away from the tool. This ensures that the motor is securely supported against the housing by the second anti-vibration element. In this way, any static moment present with respect to a pivot point around the first anti-vibration element can be reliably absorbed. Specifically, the effect of the weight force on the housing can be absorbed so that the housing does not contact the motor and / or the guide tube. This prevents the motor and / or the guide tube from contacting the housing. This prevents the transmission of vibrations from the motor to the housing. This increases the housing's service life. The motor has a large vibrating mass.By positioning the first anti-vibration element on the side of the motor facing the tool and the second anti-vibration element on the side facing away from the tool, the motor's vibrations can be effectively dampened by the two anti-vibration elements. If only the first anti-vibration element were present, the motor's center of gravity could oscillate around a pivot point of the first anti-vibration element with a large lever arm, potentially impacting the housing. Positioning the second anti-vibration element on the side facing away from the tool reliably prevents this scenario. This placement is more effective than positioning the second anti-vibration element on the side facing the tool.

[0012] In an advantageous embodiment of the invention, a battery for supplying energy to the motor is arranged in the housing. The battery can be connected to the housing in such a way that, together with the housing, it is vibrationally decoupled from the motor by means of the second anti-vibration element. This also protects the battery from motor vibrations. The arrangement of a battery on the housing increases the housing's inertial mass. This prevents the housing from absorbing certain vibration frequencies. It also prevents the emission of high-frequency sound from the housing. In particular, the housing has a battery compartment for receiving the battery. Advantageously, the battery compartment has a structure in the form of ridges and / or thickenings. By appropriately designing the structure of the battery compartment, the sound emission from the housing can be positively influenced.The housing contributes little or not at all to the noise generated by the working device.

[0013] The first anti-vibration element has a longitudinal distance from the battery. The second anti-vibration element has a longitudinal distance from the first anti-vibration element of the same length. Preferably, the element distance is at least 50% of the battery distance. Batteries typically have a large mass. The center of gravity of the unit consisting of the housing and battery is significantly influenced by the battery's position within the housing. By ensuring that the element distance is at least 50% of the battery distance, the housing is supported relatively close to the battery and its center of gravity. This prevents large relative movements between the housing and the motor. This protects the housing, and especially the battery, from contact with the motor, particularly from the transmission of motor vibrations, and ensures a long service life for the handheld tool.

[0014] Preferably, the battery spacing is at least 100 mm, and particularly at least 500 mm. With power tools that have a large battery spacing, wear on the housing and / or the battery can be particularly high. In such cases, the second anti-vibration element according to the invention is especially advantageous.

[0015] In particular, the maximum battery spacing is 800 mm. This ensures that the leverage exerted by the housing and battery at the first anti-vibration element is not too great.

[0016] Preferably, the battery spacing is greater than the element spacing. In particular, the second anti-vibration element is arranged longitudinally between the motor and the battery.

[0017] Preferably, the battery is arranged on the side of the motor facing away from the tool. In this case, the design of the handheld tool according to the invention is particularly advantageous, since the unit consisting of the housing and battery has a center of gravity that is located particularly far from the first anti-vibration element in the longitudinal direction, so that, in principle, large vibration amplitudes of the housing together with the battery are conceivable. This also means that, in principle, significant wear of the housing or the battery is possible. The second anti-vibration element prevents such wear.

[0018] The advantage is that the guide tube is at least indirectly rigidly connected to the motor. This ensures the motor is securely held. In particular, the positioning of a gearbox between the motor and the transmission shaft is reliably determined.

[0019] Preferably, the guide tube and the motor are connected via a connection that is free of an anti-vibration element.

[0020] In an advantageous embodiment of the invention, the motor is connected to the housing on its side facing away from the tool in a vibration-isolated manner at at least one first bearing point and one second bearing point. In particular, the first bearing point is arranged at a first radial distance from an output shaft of the motor. In particular, the second bearing point is arranged at a second radial distance from the output shaft of the motor. Preferably, the first radial distance and the second radial distance are each at least as large as the radius of the guide tube. The radius of the guide tube is measured, in particular, radially to the output shaft of the motor at the point where the guide tube enters the housing. Because the radial distances of the two bearing points are at least as large as the radius of the guide tube, the torque, in particular the force torque of the motor, is efficiently absorbed at the bearing points.In particular, the first and second bearing points are arranged at an angular distance from each other with respect to the motor's output shaft. This also contributes to effective torque absorption, especially of the motor's torque. Specifically, the angular distance is at least 90°, at least 150°, at least 170°, and at most 190°.

[0021] Preferably, the motor is vibration-isolated from the housing at its bearing points via an anti-vibration element. Advantageously, the motor is mounted to the housing at the first and second bearing points via the second anti-vibration element. It is also possible for the motor to be mounted to the housing at multiple bearing points using the same one-piece anti-vibration element.

[0022] Advantageously, the handheld tool has a third anti-vibration element. In particular, the third anti-vibration element connects the motor to the housing in a vibration-isolated manner, at least indirectly. Preferably, the third anti-vibration element is arranged on the side of the motor facing away from the tool. The handheld tool also has a fourth anti-vibration element. Advantageously, the fourth anti-vibration element is arranged such that it acts as a vibration-isolated element between the housing and the guide tube. Preferably, the fourth anti-vibration element is arranged on the side of the motor facing the tool. In particular, the first anti-vibration element and the fourth anti-vibration element lie in a first plane. The first plane extends longitudinally. Advantageously, the second anti-vibration element and the third anti-vibration element lie in a second plane. The second plane extends longitudinally.Advantageously, the first and second planes enclose an angle of 70° to 110°, particularly 80° to 100°. This results in exceptionally stable support of the housing relative to the guide tube and the motor. The first and fourth anti-vibration elements form a first pair. The second and third anti-vibration elements form a second pair. The first and second pairs are arranged in a crosswise orientation relative to each other. This dampens vibrations in radial directions of the motor's output shaft, which are essentially transverse, and especially perpendicular, to each other. This results in effective damping of the motor's vibrations relative to the housing.

[0023] In particular, the first anti-vibration element is arranged at a third radial distance from the transmission shaft, especially the output shaft of the motor. Advantageously, the fourth anti-vibration element is arranged at a fourth radial distance from the transmission shaft, especially the output shaft of the motor. Preferably, the third radial distance is at least as large as the radius of the guide tube. Advantageously, the fourth radial distance is at least as large as the radius of the guide tube.

[0024] In an advantageous embodiment of the invention, the hand-held tool is designed such that the transmission of vibrations from the transmission shaft to the housing is only possible with damping via anti-vibration elements. This also protects the housing from wear caused by the transmission shaft.

[0025] Advantageously, one of the anti-vibration elements is directly connected to the housing and directly to the guide tube. In particular, the first anti-vibration element is directly connected to the housing and directly to the guide tube.

[0026] Advantageously, one of the anti-vibration elements, especially the first one, seals a gap between the guide tube and the housing. This allows for efficient airflow to cool the motor.

[0027] Advantageously, the handheld tool includes a handle. The handle is connected to the housing. In particular, the handle, together with the housing, is vibration-isolated from both the guide tube and the motor. This allows the user of the handheld tool to operate it comfortably. The user is protected from the undamped transmission of vibrations from the motor to the handle and to the user themselves. This vibration isolation of the handle, together with the housing, from the guide tube protects the user from the undamped transmission of vibrations from the guide tube, and especially from the undamped transmission of vibrations from the tool itself via the guide tube to the handle and to the user themselves.

[0028] The motor is effectively connected to the housing exclusively via interposed anti-vibration elements, so that vibrations from the motor to the housing are only transmitted in a dampened form via these elements. This ensures that the housing is not damaged by motor vibrations.

[0029] Exemplary embodiments of the invention are explained below with reference to the drawing. The drawing shows: Fig. 1 a schematic sectional view of a first embodiment of a hand-held work tool with a first anti-vibration element and a second anti-vibration element, Fig. 2 a schematic sectional view along section line II-II from Fig. 2 , Fig. 3 a schematic representation of the anti-vibration elements made of Fig. 1 looking in the direction of arrow III Fig. 1Fig. 4 shows a schematic sectional view of a second embodiment of a hand-held work tool with a first anti-vibration element and a second anti-vibration element; Fig. 5 shows a schematic representation of the anti-vibration elements made of Fig. 4 looking in the direction of arrow V Fig. 4 Fig. 6 a schematic sectional view of a third embodiment of a hand-held work tool with a first anti-vibration element and a second anti-vibration element, Fig. 7 a schematic representation of the anti-vibration elements made of Fig. 6 facing in the direction of arrow VII from Fig. 6 .

[0030] Fig. 1Figure 1 shows a handheld tool 1 with a guide tube 4. In the exemplary embodiment, the handheld tool 1 is a brush cutter. However, the handheld tool can also be any other tool with a guide tube. The handheld tool can also be a pole pruner, a hedge trimmer, or the like.

[0031] The handheld tool 1 comprises a motor 2 and a tool 5. In the exemplary embodiment, the motor 2 is an electric motor. However, the motor could also be an internal combustion engine. In the exemplary embodiment, the tool 5 is a cutting line of a trimmer head. However, the tool 5 could also be a saw chain, a saw blade, or the like. The motor 2 drives the tool 5. The motor 2 is arranged in a housing 6.

[0032] The guide tube 4 has a front longitudinal end 10 and a rear longitudinal end 11. The tool 5 is arranged at the front longitudinal end 10 of the guide tube 4. The housing 6 is arranged at the rear longitudinal end 11 of the guide tube 4.

[0033] A transmission shaft 3 is housed in the guide tube 4. The transmission shaft 3 connects the motor 2 to the tool 5. The motor 2 drives the tool 5 via the transmission shaft 3.

[0034] The guide tube 4 protrudes from the housing 6. The housing 6 is held by the guide tube 4. The housing 6 at least partially surrounds the guide tube 4. The guide tube 4 projects into the housing 6.

[0035] The hand-held tool 1 comprises a first anti-vibration element 7. The first anti-vibration element 7 is arranged such that it acts as a vibration decoupling element between the housing 6 and the guide tube 4. The first anti-vibration element 7 is arranged between the housing 6 and the guide tube 4 for vibration decoupling.

[0036] The housing 6 has an entry point 12. The guide tube 4 enters the housing 6 at the entry point 12. The entry point 12 is an opening in the housing 6. This opening completely penetrates one wall of the housing. Through the entry point 12, the guide tube 4 penetrates from an outer surface of the housing 6 into the interior of the housing 6. The entry point 12 faces the tool 5 with respect to the longitudinal direction 49. At the entry point 12, the guide tube 4 extends in a longitudinal direction 49. If the guide tube is curved at the entry point 21, the longitudinal direction 49 runs in the direction of a tangent to the guide tube at the entry point 12. In this case, the longitudinal direction 49 runs in the direction of a tangent to the transmission shaft 3 at the entry point 12. The motor 2 has an output shaft 21 with an axis of rotation 50. In the exemplary embodiment, the longitudinal direction 49 runs in the direction of the axis of rotation 50.

[0037] In an alternative description of the invention, the longitudinal direction 49 may run along the path of the transmission shaft 3. The longitudinal direction 29 then follows the path of the transmission shaft 3. The lengths measured in the direction of the longitudinal direction 49 then correspond to a path integral along the possibly curved longitudinal direction 49. All length specifications and ratios given here also apply to lengths measured along such a defined longitudinal direction.

[0038] In the exemplary embodiment, the first anti-vibration element 7 is arranged in the housing 6. In particular, the first anti-vibration element 7 is arranged at the inlet 12 of the housing 6. However, it is also possible for the first anti-vibration element 7 to be arranged at a different location. The first anti-vibration element 7 connects the guide tube 4 to the housing 6 in a vibration-isolated manner, at least indirectly. In the exemplary embodiment according to Fig. 1 The first anti-vibration element 7 connects the guide tube 4 and the housing 6 directly and vibration-isolated. Alternatively, at least one component may be arranged between the first anti-vibration element 7 and the guide tube 4, which is rigidly connected to the guide tube 4, so that this component vibrates together with the guide tube 4. In this case, the first anti-vibration element 7 is indirectly connected to the guide tube 4 via this component. It is also possible to arrange at least one component between the housing 6 and the first anti-vibration element 7, which is rigidly connected to the housing 6, so that this component vibrates together with the guide tube 4. In this case, the first anti-vibration element 7 is indirectly connected to the guide tube 4 via this component.

[0039] The motor 2 has a side 18 facing the tool 5. The side 18 facing the tool 5 is oriented towards the tool 5 with respect to the longitudinal direction 49. The first anti-vibration element 7 is arranged on the side 18 of the motor 2 facing the tool 5.

[0040] In the first embodiment, the first anti-vibration element 7 acts transversely, and in particular perpendicularly, to the longitudinal direction 49. The first anti-vibration element 7 can dampen vibrations with an amplitude in a transverse direction, and in particular perpendicularly, to the longitudinal direction 49. In the embodiments, the first anti-vibration element 7 is an elastomer. However, it is also possible for the first anti-vibration element to be a spring, in particular a coil spring. Other types of damping elements are also possible.

[0041] The working device 1 comprises a second anti-vibration element 9. The second anti-vibration element 9 connects the motor 2 to the housing 6 in a vibration-isolated manner, at least indirectly. In an exemplary embodiment according to Fig. 1 The second anti-vibration element 9 connects the motor 2 directly to the housing 6 in a vibration-isolated manner. The second anti-vibration element 9 is arranged between the motor 2 and the housing 6 for vibration decoupling.

[0042] In the first embodiment, the second anti-vibration element 9 acts transversely, and in particular perpendicularly, to the longitudinal direction 49. The second anti-vibration element 9 can dampen vibrations with an amplitude in a transverse direction, and in particular perpendicularly, to the longitudinal direction 49. In the embodiments, the second anti-vibration element 9 is an elastomer. However, it is also possible for the second anti-vibration element to be a spring, in particular a coil spring. Other types of damping elements are also possible.

[0043] The second anti-vibration element 9 has a longitudinal distance e measured in the direction 49 from the first anti-vibration element 7. The housing 6 has a longitudinal length 1 measured in the direction 49. The element distance e is at least 30% of the housing length 1. In the exemplary embodiments, the element distance e is at least 40% of the housing length 1. In the exemplary embodiments, the element distance e is at most 100%, in particular at most 95%, of the housing length 1. It can also be provided that the element distance e is at most 70% of the housing length l.

[0044] The guide tube 4 is at least indirectly rigidly connected to the motor 2. The guide tube 4 and the motor 2 are connected to each other via a connection that is free of an anti-vibration element. It is also possible for a gearbox to be arranged between the motor 2 and the guide tube 4. The motor is then indirectly supported by the guide tube 4 via the gearbox.

[0045] In particular, the connection between motor 2 and guide tube 4 includes a flange (not shown). The flange is attached to the guide tube or the gearbox. The flange is non-rotatably connected to the guide tube 4. In the exemplary embodiment, motor 2 comprises a stator and a rotor. The stator is non-rotatably attached to the flange. The rotor is rotatably mounted on the flange. Motor 2 is rigidly connected to the guide tube 4 via the flange.

[0046] Vibrations from motor 2 can be transmitted unhindered to guide tube 4. Vibrations from guide tube 4 can be transmitted unhindered to motor 2. Motor 2 and guide tube 4 are vibration-coupled. Due to the rigid connection between motor 2 and guide tube 4, it is possible to support both together against the housing. Therefore, two anti-vibration elements are generally sufficient to support the unit consisting of motor 4 and guide tube 4.

[0047] The second anti-vibration element 9 connects the guide tube 4 to the housing 6, at least indirectly, in a vibration-isolated manner. Alternatively, the second anti-vibration element 9 connects the guide tube 4 to the housing 6 indirectly via the motor 2 in a vibration-isolated manner. It is also possible for the second anti-vibration element to connect the guide tube directly to the housing 6 in a vibration-isolated manner. The motor 2 has a side 17 facing away from the tool 5. The side 17 of the motor 7 facing away from the tool 5 is oriented away from the tool 5 with respect to the longitudinal direction 49. In the exemplary embodiments, the second anti-vibration element 9 is arranged on the side of the motor 2 facing away from the tool 5. However, it is also possible for the second anti-vibration element to be arranged at a different location. In the exemplary embodiments, the motor 2 is arranged between the first anti-vibration element 7 and the second anti-vibration element 9 with respect to the longitudinal direction 49.

[0048] The motor 2 is connected to the housing 6 exclusively via intermediate anti-vibration elements 7, 9, so that vibrations from the motor 2 to the housing 6 can only be transmitted in a damped manner via anti-vibration elements 7, 9.

[0049] The hand-held tool 1 is designed such that the transmission of vibrations from the transmission shaft 3 to the housing 6 is only possible in a damped form via anti-vibration elements 7 and 9. The housing 6 is supported by both the first anti-vibration element 7 and the second anti-vibration element 9. The housing 6 is held, at least indirectly, to the guide tube 4 via the first anti-vibration element 7 and the second anti-vibration element 9.

[0050] The working device 1 includes a battery 20. The battery 20 serves to supply the motor 2 with energy. The battery 20 is arranged in the housing 6. The battery 20 is connected to the housing 6 in such a way that the battery 20 and the housing 6 form a common vibrating mass. The battery 20 is connected to the housing 6 in such a way that the battery 20, together with the housing 6, is vibrationally decoupled from the motor 2 by means of the second anti-vibration element 9. The battery 20 is attached to the housing 6. It may be provided that the battery 20 is rigidly connected to the housing 6. In the exemplary embodiment, the battery 20 is held in the housing 6, in particular in a battery compartment of the housing 6 (not shown), by means of ejection and clamping springs (not shown).

[0051] The first anti-vibration element 7 has a battery distance a, measured in the longitudinal direction 49, from the battery 20. The element distance e, measured in the longitudinal direction 49, between the first anti-vibration element 7 and the second anti-vibration element 9 is at least 50% of the battery distance a. In the exemplary embodiments, the element distance e is at least 60% of the battery distance a. In the exemplary embodiment according to Fig. 1 The battery spacing a is at least 100 mm. In the embodiments according to the Figures 4 and 6 The battery spacing a is at least 500 mm. The battery spacing a is a maximum of 800 mm. The battery spacing a is greater than the element spacing e. The battery 20 is arranged on the side 17 of the motor 2 facing away from the tool 5. In the exemplary embodiments, the second anti-vibration element 9 is arranged between the motor 2 and the battery 20 with respect to the longitudinal direction 49.

[0052] As in Figure 1As shown, the hand-held work device 1 in the exemplary embodiment according to Fig. 1 A handle 16. The handle 16 is attached to the guide tube 4. The handle 16 is vibration-coupled to the guide tube 4. An actuating element 23 is arranged on the handle 16. The actuating element 23 serves to actuate the motor 2. The hand-held working device 1 can be held by means of the handle 16. The hand-held working device 1 also has a guide handle 15. The guide handle 15 serves to guide the hand-held working device 1. In the exemplary embodiment according to Fig. 1 The guide handle 15 is formed by a handle tube. The handle tube of the guide handle 15 is attached to the guide tube 4. The handle tube of the guide handle 15 is loop-shaped.

[0053] As in Fig. 2As shown, the hand-held tool 1 includes a third anti-vibration element 19. All the preceding statements regarding the second anti-vibration element 9 apply analogously to the third anti-vibration element 19. In particular, the third anti-vibration element 19 connects the motor 2 to the housing 6 in a vibration-isolated manner, at least indirectly. The third anti-vibration element 19 is arranged such that it acts as a vibration decoupling element between the housing 6 and the guide tube 4. The third anti-vibration element 19 is located on the side 17 of the motor 2 facing away from the tool 5. The second anti-vibration element 9 and the third anti-vibration element 19 are spaced apart from each other in a direction transverse to the longitudinal direction 49, or, in the exemplary embodiments, in a direction perpendicular to the longitudinal direction 49.

[0054] The hand-held tool 1 has a first bearing 13 and a second bearing 14. The first bearing 13 and the second bearing 14 serve to support the motor 2, at least indirectly. It is possible that further components of the tool 1 are arranged between the bearings 13 and 14 and the motor 2. In the exemplary embodiment, the motor 2 is additionally supported by the first anti-vibration element 7. The first bearing 13 and the second bearing 14 are located on the side 17 of the motor 2 facing away from the tool 5. The first anti-vibration element 7 is located on the side 18 of the motor 2 facing the tool 5. The first anti-vibration element 7 supports the housing 6 at a third bearing 32 on the guide tube 4. In this way, the motor 2 is supported, at least indirectly, at the third bearing 32.It can also be provided that the unit consisting of motor 2 and guide tube 4 is supported only at a single bearing point on the side 18 of motor 2 facing the tool 5 and simultaneously only at a single bearing point on the side 17 facing away from the tool 5.

[0055] In the exemplary embodiment, the motor 2 is vibration-isolated from the housing 6 on its side 17 facing away from the tool 5 at least at the first bearing point 13 and the second bearing point 14. As in Fig. 2As shown, the first bearing point 13 has a first radial distance r1 to the axis of rotation 50 of the output shaft 21. The second bearing point 14 has a second radial distance r2 to the axis of rotation 50 of the output shaft 21 of the motor 2. The guide tube 4 has a radius r. In particular, the radius r is measured at the inlet 12. The radius r of the guide tube is measured with respect to the axis of rotation 50 of the output shaft 21. The first radial distance r1 and the second radial distance r2 are each at least as large as the radius r of the guide tube 4.

[0056] As in Fig. 3As shown, the first bearing point 13 and the second bearing point 14 are arranged at an angular distance α from each other. The angular distance α is measured with respect to the axis of rotation 50 of the output shaft 21 of the motor 2. The angular distance α is at least 90°, in particular at least 150°. In the exemplary embodiment, the angular distance α is at least 170°. The angular distance α is at most 270°, in particular at most 210°. In the exemplary embodiment, the angular distance α is 190°.

[0057] In the exemplary embodiment according to Fig. 3The motor 2 is vibration-isolated at the first bearing point 13 via the second anti-vibration element 9 to the housing 6. At the second bearing point 14, the motor 2 is vibration-isolated at the housing 6 via the third anti-vibration element 19. It is also possible for the motor to be mounted on the housing at both the first and second bearing points via the second anti-vibration element. It is also possible for the motor to be mounted on the housing at multiple bearing points using the same one-piece anti-vibration element.

[0058] As in the Figures 1 and 2 As shown, a gap 24 is located between the guide tube 4 and the housing 6. The gap 24 runs around the guide tube 4. The gap 24 is located at the inlet point 12. In the exemplary embodiment according to the Figures 1 and 2 The first anti-vibration element 7 seals the gap 24. This allows for good cooling of the motor 2.

[0059] The Figures 4 and 5 show a second embodiment of a hand-held work device 1. The Figure 6 and 7 Figure 1 shows a third embodiment of a hand-held tool 1. Reference numerals for corresponding components of the hand-held tools 1 are the same in all embodiments. The description of the first embodiment according to the Figures 1 to 3 largely corresponds to the second embodiment according to the Figures 4 and 5 and to the third embodiment according to the Figure 6 and 7The second and third embodiments differ essentially from the first embodiment in that the housing 6, according to the second and third embodiments, is designed such that a handle 8 is vibrationally coupled to the housing 6. For this purpose, the housing 6 in the second and third embodiments includes a retaining element 25. The housing length 1 is greater in the second and third embodiments than in the first embodiment. The retaining element 25 at least indirectly holds the handle 8. The retaining element 25 completely overlaps the guide tube 4 with respect to the longitudinal direction 49. The retaining element 25 surrounds the guide tube 4. The retaining element 25 runs continuously around the circumference of the guide tube 4. In embodiments according to the Figures 4 to 7The entry point 12 for the guide tube 4 into the housing 6 is formed in the retaining part 25. The retaining part 25 can be formed integrally with the housing 6. In particular, the retaining part 25 is formed with the housing 6 of the same material. In the exemplary embodiment, the retaining part 25 is firmly connected to a base body 29 of the housing 6. A screw connection 30 is provided for this purpose.

[0060] In both the second and third embodiments, the first anti-vibration element 7 is arranged at the entry point 12. However, it is also possible for the first anti-vibration element to be arranged at a location other than the entry point 12. For example, the fifth anti-vibration element 28 from the third embodiment can also be considered the first anti-vibration element.

[0061] The in the Figures 4 and 6In the second and third embodiments, the first anti-vibration element 7 indirectly connects the housing 6 to the guide tube 4. A connecting piece 31 is arranged between the guide tube 4 and the first anti-vibration element 7. The connecting piece 31 is attached to the guide tube 4, in particular rigidly attached.

[0062] In the second and third embodiments, the first anti-vibration element 7 is arranged at a third radial distance r3 from the transmission shaft 3, in particular from the output shaft 21 of the motor 2. The fourth anti-vibration element 27 is arranged at a fourth radial distance r4 from the transmission shaft 3, in particular from the output shaft 21 of the motor 2. The third radial distance r3 is at least as large as the radius r of the guide tube 4. The fourth radial distance r4 is at least as large as the radius r of the guide tube 4.

[0063] The position of the second anti-vibration element 9 remains unchanged. Therefore, the element spacing e between the first anti-vibration element 7 and the second anti-vibration element 9 is unchanged in the embodiments according to the Figures 4 to 7 larger than in the embodiment according to the Figures 1 to 3 The battery distance a between the first anti-vibration element 7 and the battery 20 is also, in the exemplary embodiments according to the Figures 4 to 7 larger than in the exemplary embodiment according to the Figures 1 to 3 . However, the ratios of battery spacing a to element spacing e and element spacing e to housing length l specified for the first embodiment also apply to the second and third embodiments.

[0064] In the second and third embodiments, the handle 8 is attached to a handlebar 22. The handlebar 22 is rigidly connected to the housing 6. The handlebar 22 is rigidly connected to the retaining part 25 of the housing 6. The actuating element 23 for actuating the motor 2 is arranged on the handle 8. A second handle (not shown) is attached to the handlebar 22. The handle 8 and the second handle are spaced apart from each other in a transverse direction, in particular perpendicular to the longitudinal direction 49.

[0065] The handle 8, together with the housing 6, is vibration-isolated from the motor 2. The handle 8, together with the housing 6, is also vibration-isolated from the guide tube 4. This means the user is exposed to little or no disturbance from the vibrations of the motor 2 and / or the tool 5. Additional, especially separate, anti-vibration elements that only isolate the handle from the housing and / or only isolate the battery from the housing are unnecessary. This results in a simpler and more cost-effective design.

[0066] The hand-held working device 1 according to the second and third embodiments has a [feature / component] in the Figures 5 and 7The fourth anti-vibration element 27 is shown. This fourth anti-vibration element 27 is arranged such that it acts as a vibration decoupling element between the housing 6 and the guide tube 4. The fourth anti-vibration element 27 is located on the side 18 of the motor 2 facing the tool 5. With respect to the longitudinal direction 49, the fourth anti-vibration element 27 is positioned between the motor 2 and the tool 5. The fourth anti-vibration element 27 supports the housing 6 at a fourth bearing point 33 on the guide tube 4. The motor 2 is supported, at least indirectly, at the fourth bearing point 33. On the side 18 of the motor 2 facing the tool 5, the motor 2 is supported, at least indirectly, at both the third bearing point 32 and the fourth bearing point 33.

[0067] As in the Figures 5 and 7As shown, the hand-held tool 1 in the second and third embodiments also features a third anti-vibration element 19. The description of the third anti-vibration element 19 for the first embodiment also applies to the second and third embodiments. The third anti-vibration element 19 connects the motor 2 to the housing 6, at least indirectly, in a vibration-isolated manner. The third anti-vibration element 19 is arranged on the side 17 of the motor 2 facing away from the tool 5.

[0068] The first anti-vibration element 7 and the fourth anti-vibration element 27 are located in a first level E1, as in the Figures 5 and 7The first plane E1 extends in the longitudinal direction 49. The second anti-vibration element 9 and the third anti-vibration element 19 lie in a second plane E2. The second plane E2 extends in the longitudinal direction 49. The first anti-vibration element 7 and the fourth anti-vibration element 27 are arranged at the same height with respect to the longitudinal direction 49. The first anti-vibration element 7 and the fourth anti-vibration element 27 lie in a plane that is perpendicular to the longitudinal direction 49. The second anti-vibration element 9 and the third anti-vibration element 19 are arranged at the same height with respect to the longitudinal direction 49. The second anti-vibration element 9 and the third anti-vibration element 19 lie in a common plane that is perpendicular to the longitudinal direction 49. The first plane E1 and the second plane E2 form an angle α. The first plane E1 and the second plane E2 are tilted relative to each other with respect to the longitudinal direction 49.The angle α ranges from 70° to 110°. In the second and third embodiments, the angle α ranges from 80° to 100°.

[0069] The third embodiment according to the Figure 6 and 7 differs from the second embodiment according to the Figures 4 and 5 The only difference is that in the third embodiment a fifth anti-vibration element 28 is provided. The fifth anti-vibration element 28 is arranged between the first anti-vibration element 7 and the second anti-vibration element 9 with respect to the longitudinal direction 49.

[0070] The fifth anti-vibration element is arranged to act as a vibration decoupling element between the housing 6 and the guide tube 4. The fifth anti-vibration element 28 is located on the side 18 of the motor 2 facing the tool 5. The fifth anti-vibration element 28 surrounds the guide tube 4 and runs completely around it. The hand-held tool 1 according to the third embodiment has a gap 26 between the guide tube 4 and the housing 6. This gap 26 is located between the motor 2 and the inlet 12 with respect to the longitudinal direction 49. The fifth anti-vibration element 28 seals the gap 26. This seals the part of the housing 6 in which the motor 2 is located on the side 18 of the motor 2 facing the tool 5. This ensures good airflow for cooling the motor 2.The fifth anti-vibration element 28 acts in a transverse direction, particularly in a direction perpendicular to the longitudinal direction 49. The fifth anti-vibration element 28 connects the guide tube 4 directly to the housing 6. However, it can also be provided that at least one component is arranged between the fifth anti-vibration element 28 and the guide tube 4, which is rigidly connected to the guide tube 4, so that the at least one component vibrates together with the guide tube 4. In this case, the fifth anti-vibration element 28 is indirectly connected to the guide tube 4 via the at least one component. It can also be provided that at least one component is arranged between the housing 6 and the fifth anti-vibration element 28, which is rigidly connected to the housing 6, so that the at least one component vibrates together with the guide tube 4.In this case, the fifth anti-vibration element 28 is indirectly connected to the guide tube 4 via at least one component.

[0071] The description of the Fig. 5 This also applies to the Fig. 7 to. In Fig. 7 The fifth anti-vibration element 28 is also shown.

[0072] The schematic Fig. 2 not only shows a section along section line II-II from Fig. 1 , but also a section along the section line II-II from Fig. 6 The description of Fig. 2 This also applies to the third embodiment, where the anti-vibration element 7, described in the text as the first anti-vibration element, corresponds to the fifth anti-vibration element 28. Also in Fig. 4 The section line II-II is drawn. The section view in Fig. 2However, it also shows the first anti-vibration element 7 of the first embodiment, which is arranged in a different location in the second embodiment. Except for the description of the first anti-vibration element 7, the description of the Fig. 2 also to the second embodiment.

Claims

1. Hand-held working device comprising a motor (2), a transmission shaft (3), a tool (5), a guide tube (4), a housing (6), and a first anti-vibration element (7), wherein the motor (2) drives the tool (5) via the transmission shaft (3), wherein the transmission shaft (3) is received in the guide tube (4), wherein the motor (2) is arranged in the housing (6), wherein the tool (5) is arranged at a front longitudinal end (10) of the guide tube (4), wherein the housing (6) is arranged at a rear longitudinal end (11) of the guide tube (4), wherein the housing (6) at least partially surrounds the guide tube (4), wherein the guide tube (4) protrudes from the housing (6), wherein the guide tube (4) extends in a longitudinal direction (49) at an entry point (12) into the housing (6), wherein the first anti-vibration element (7) is arranged such that it acts in a vibration-decoupling manner between the housing (6) and the guide tube (4), wherein the first anti-vibration element (7) is arranged on the side (18) of the motor (2) facing the tool (5), characterized in that the hand-held working device (1) comprises a second anti-vibration element (9), that the second anti-vibration element (9) connects the motor (2) to the housing (6) in a vibration-decoupling manner at least indirectly.

2. Hand-held working device according to claim 1, characterized in that the second anti-vibration element (9) is arranged at an element spacing (e), measured in the longitudinal direction (49), from the first anti-vibration element (7), that the housing (6) has a housing length (1), measured in the longitudinal direction (49), and that the element spacing (e) amounts to at least 30%, in particular at least 40%, of the housing length (1).

3. Hand-held working device according to claim 1 or 2, characterized in that the second anti-vibration element (9) connects the guide tube (4) to the housing (6) in a vibration-decoupling manner at least indirectly.

4. Hand-held working device according to one of claims 1 to 3, characterized in that the second anti-vibration element (9) is arranged on the side (17) of the motor (2) facing away from the tool (5).

5. Hand-held working device according to one of claims 1 to 4, characterized in that a battery (20) for supplying the motor (2) with energy is arranged in the housing (6).

6. Hand-held working device according to claim 5, characterized in that the first anti-vibration element (7) has a battery spacing (a), measured in the longitudinal direction (49), from the battery (20), and that the element spacing (e) amounts to at least 50% of the battery spacing (a).

7. Hand-held working device according to claim 6, characterized in that the battery spacing (a) amounts to at least 100 mm, in particular at least 500 mm, in particular at most 800 mm.

8. Hand-held working device according to claim 6 or 7, characterized in that the battery spacing (a) is greater than the element spacing (e).

9. Hand-held working device according to one of claims 5 to 8, characterized in that the battery (20) is connected to the housing (6) such that the battery (20), together with the housing (6), is vibration-decoupled relative to the motor (2) by means of the second anti-vibration element (9).

10. Hand-held working device according to one of claims 5 to 9, characterized in that the battery (20) is arranged on the side (17) of the motor (2) facing away from the tool (5).

11. Hand-held working device according to one of claims 1 to 10, characterized in that the guide tube (4) is connected rigidly to the motor (2) at least indirectly and / or that the guide tube (4) and the motor (2) are connected via a connection which is free of an anti-vibration element.

12. Hand-held working device according to one of claims 1 to 11; characterized in that the motor (2) is connected to the housing (6) in a vibration-decoupling manner on its side (17) facing away from the tool (5) at at least one first bearing location (13) and one second bearing location (14), that the first bearing location (13) is arranged at a first radial spacing (r1) from an output shaft (21) of the motor (2), that the second bearing location (14) is arranged at a second radial spacing (r2) from the output shaft (21) of the motor (2), that the first radial spacing (r1) and the second radial spacing (r2) are each at least as large as a radius (r) of the guide tube (4), and that the first bearing location (13) and the second bearing location (14) are arranged relative to one another at an angular spacing (Δ) with respect to the output shaft (21) of the motor (2).

13. Hand-held working device according to one of claims 1 to 12, characterized in that the hand-held working device (1) comprises a third anti-vibration element (19), that the third anti-vibration element (19) connects the motor (2) to the housing (6) in a vibration-decoupling manner at least indirectly, that the third anti-vibration element (19) is arranged on the side (17) of the motor (2) facing away from the tool (5), that the hand-held working device (1) comprises a fourth anti-vibration element (27), that the fourth anti-vibration element (27) is arranged such that it acts in a vibration-decoupling manner between the housing (6) and the guide tube (4), that the first anti-vibration element (7) and the fourth anti-vibration element (27) lie in a first plane (E1) extending in the longitudinal direction (49), that the second anti-vibration element (9) and the third anti-vibration element (19) lie in a second plane (E2) extending in the longitudinal direction (49), and that the first plane (E1) and the second plane (E2) enclose an angle (α) of 70° to 110°, in particular of 80° to 100°.

14. Hand-held working device according to one of claims 1 to 13, characterized in that the hand-held working device (1) is designed such that a transmission of vibrations from the transmission shaft (3) to the housing (6) is possible only in damped manner via anti-vibration elements (7, 9, 19, 27).

15. Hand-held working device according to one of claims 1 to 14, characterized in that the hand-held working device (1) comprises a handle (8), wherein the handle (8) is connected to the housing (6), and that the handle (8), together with the housing (6), is vibration-decoupled both relative to the guide tube (4) and relative to the motor (2).

16. Hand-held working device according to one of claims 1 to 15, characterized in that the motor (2) is connected to the housing (6) exclusively via interposed anti-vibration elements (7, 9, 19, 27), such that vibrations from the motor (2) to the housing (6) are transmissible in damped manner only via anti-vibration elements (7, 9, 19, 27).