hand-held power tool with rotary oscillating drive

Abstract

The invention relates to a hand tool machine (10) with a drive motor (12), wherein the drive motor (12) is arranged in a housing (14), and with a switch (13), wherein the switch (13) is arranged on the housing (14), wherein the drive motor (12) is arranged in a section (A1) in the housing (14), in which the switch (13) is also arranged.

Description

[0001] The invention relates to a hand-held power tool with a rotary oscillation drive. State of the art

[0002] For handheld power tools with rotary oscillation drives, there are various options for designing a stable and rigid housing. Expensive materials such as aluminum or magnesium are often used. A cheaper alternative is a purely plastic housing consisting of two half-shells. Especially with plastic housings, it is often difficult to construct a housing that is as continuous, stable, and torsion-resistant as possible. Metal housings are quite expensive. Disclosure of the invention

[0003] In order to overcome these disadvantages, a hand-held power tool with a drive motor is proposed, wherein the drive motor is arranged in a housing, specifically in a first housing section in which a switch for switching the hand-held power tool on and off is also arranged.

[0004] An output shaft which can be driven in a rotationally oscillating manner is arranged in the front part of the housing, the output shaft (16) being mounted in the housing via a bearing.

[0005] Advantageously, the bearing is arranged in a second housing section in the front part of the housing, wherein the second housing section extends over an entire area of ​​the housing in which the output shaft and the bearing are arranged.

[0006] According to the invention, the housing has a structure. This has the advantage of creating a relatively stable, torsion-resistant housing while simultaneously saving material. A honeycomb structure, applied to the entire inner wall of the housing, is particularly suitable for this purpose. The honeycomb structure is very suitable for this purpose because it not only provides stability but also dampens sound and vibration.

[0007] In addition, a more rigid housing prevents the battery holder area from starting to vibrate in hand tools with batteries as the power source, which reduces the risk of damaging the battery.

[0008] Further advantages can be seen in the figures and the figure description. Drawings

[0009] They show: Fig. 1: a hand tool with rotary oscillation drive in schematic representation, Fig. 2: a housing of the hand tool with honeycomb structure in schematic representation, Description

[0010] Fig. 1 shows a handheld power tool 10 with a drive motor 12. The drive motor 12 is arranged in a housing 14. A switch 13 is arranged on the housing to switch the handheld power tool on and off. The drive motor 12 is arranged in a first housing section A1 in the housing 14, in which the switch 13 is also arranged. This is the section in the housing 14 around which a user of the handheld power tool 10 places his hand in order to guide the handheld power tool 10. An output shaft 16 is arranged in the front part of the housing 14 to drive a processing tool 18. The output shaft 16 can be driven in a rotationally oscillating manner about its longitudinal axis. The output shaft 16 is mounted in the housing 14 via a bearing 20. The bearing 20 is arranged in a second housing section A2 in the front part of the housing 14.The second housing section A2 extends over an entire area of ​​the housing 14 in which the output shaft 16 and the bearing 20 are arranged. The housing 14 has a structure 25, as shown in FIG. Fig.2. In the exemplary embodiment according to the invention, the structure 25 is designed hexagonally as a honeycomb structure. The honeycomb structure forms individual honeycombs. This structure enables a stable and torsion-resistant housing 14. The honeycomb structure 25 extends over the entire length l of the housing 14. In particular, the honeycomb structure 25 extends in an area between the first housing section A1, in which the drive motor 12 is arranged in the housing 14, and the second housing section A2, in which the bearing 20 of the oscillating output shaft 16 and the output shaft 16 are arranged. The honeycomb structure 25 has elevations 26, in particular ribs, in the housing 14. The height of the elevations 26 is preferably approximately 1 / 3 to 2 / 3 of the wall thickness of the housing 14. The width of the elevations 26 is preferably approximately 1 / 3 to 2 / 3 of the wall thickness of the housing. The optimal spacing between the individual honeycombs is 10–16 mm, but 7–20 mm is also possible.

[0011] A pentagonal or similarly shaped structure is also conceivable. Any ribbed structure is also possible.

Claims

[1] Hand-held power tool (10) with a drive motor (12), wherein the drive motor (12) is arranged in a housing (14), and with a switch (13), wherein the switch (13) is arranged on the housing (14), wherein the drive motor (12) is arranged in a first housing section (A1) in the housing (14), in which the switch (13) is also arranged. [2] Hand tool (10) according to claim 1, characterized by that an output shaft (16) is arranged in the front part of the housing (14) in order to drive a machining tool (18), wherein the output shaft (16) can be driven in a rotationally oscillating manner about its longitudinal axis, wherein the output shaft (16) is mounted in the housing (14) via a bearing (20). [3] Hand tool (10) according to claim 2, characterized bythat the bearing (20) is arranged in a second housing section (A2) in the front part of the housing (14), wherein the second housing section (A2) extends over an entire area of ​​the housing (14) in which the output shaft (16) and the bearing (20) are arranged. [4] Hand tool (10) according to one of the preceding claims, characterized by that the housing (14) has a structure (16). [5] Hand tool (10) according to claim 4, characterized by that the structure 16 is hexagonal and designed as a honeycomb structure. [6] Hand tool (10) according to one of claims 4 or 5, characterized by that the honeycomb structure (16) extends over an entire length (l) of the housing (14), wherein the honeycomb structure (16) extends in particular in a region between the first housing section (A1) and the second housing section (A2). [7] Hand tool (10) according to one of claims 5 or 6, characterized bythat the honeycomb structure has elevations (26), in particular ribs in the housing (14). [8] Hand tool (10) according to claim 7, characterized by that the height of the elevations (26) is preferably 1 / 3 to 2 / 3 of the wall thickness of the housing (14). [9] Hand tool (10) according to one of claims 7 or 8, characterized by that the width of the elevations (26) is preferably 1 / 3 to 2 / 3 of the wall thickness of the housing (14).

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