Handheld processing device with motor housing

Abstract

The present invention relates to a handheld processing device, which has a motor housing (1), the motor housing (1) comprising a housing base (2) extending at least at a first housing side (3) and a housing remainder (4) connected to the housing base (2), the housing remainder together with the housing base (2) enclosing a housing inner cavity (5), and the handheld processing device has a drive motor (6) held in the housing inner cavity (5) at the housing base (2), wherein the housing base (2) has a tool holding device (7) for holding a processing tool driven by the drive motor (6). According to the present invention, the housing base (2) forms a rigid motor-and tool support structure, which extends in an L-shape at least at the first housing side (3) and at the adjacent second housing side (8), wherein the housing remainder (4) forms a non-rigid housing remainder structure. The present invention also relates to the use of the handheld processing device, for example in horticultural or forestry processing equipment technology.

Description

Technical Field

[0001] The invention relates to a handheld processing device. Background Art

[0002] Correspondingly, the processing device comprises a motor housing and a drive motor held in a housing inner cavity at a housing base, wherein the motor housing comprises a housing base extending at least at a first housing side and a housing remainder connected to the housing base, which together with the housing base surrounds the housing inner cavity, wherein the housing base has a tool holding device for holding a tool driven by the drive motor. The housing base is preferably formed in one piece, alternatively it is composed of a plurality of parts. The housing remainder as a remaining housing (hence the name housing remainder) complements the housing base for forming the motor housing. The housing remainder can also preferably be formed in one piece or alternatively in multiple pieces.

[0003] By enclosing the housing interior together with the housing base body, the housing remainder means that the housing remainder together with the housing base body forms a closed housing loop at least in a plane perpendicular to the first housing side, so that the motor housing forms a closed receptacle for the drive motor and possibly further device components accommodated therein at least in this plane. Here, the housing base body and the housing remainder complement each other to form such a closed loop, i.e. neither the housing base body nor the housing remainder each individually forms such a closed loop.

[0004] Such processing devices are commonly used, for example, in horticultural and forestry technology as well as in the construction and do-it-yourself sectors in different embodiments for different processing purposes, for example as power saws, hedge trimmers or cutters.

[0005] Such processing devices in the form of motor-driven saws are known, in particular processing devices of the type with an electric drive motor, in which a housing base body is extended in a plate-like manner only at a first housing side and forms a retaining plate, for example made of a metal material, on which the drive motor is mounted on the inside and guide rails are mounted on the outside for holding a saw chain as a processing tool in a rotatable manner. In this case, the housing remainder can be formed in a hood-shaped or pot-shaped manner and can be placed on the housing base body so that the housing remainder surrounds the housing interior at all other housing sides.

[0006] Publication DE 10 2013 212 637 A1 discloses a generic electric saw in which the housing base and, for the purpose of good heat transfer, also the housing remainder are formed from a metal material and the drive motor is held on the housing base on one side and on the housing remainder on the opposite side.

[0007] Similarly, US Pat. No. 9,744,685 B2 discloses a motor-driven saw of the generic type, which has a brushless DC motor as a drive motor and in which both the housing base and the housing remainder are formed from light metal materials, in particular aluminum or magnesium materials, for the purpose of good heat dissipation of the drive motor. Summary of the invention

[0008] The object of the present invention is to provide a handheld machining device of the type mentioned at the outset which, compared with the above-mentioned prior art, is characterized in particular by a different type of realization of the motor housing.

[0009] The present invention solves this problem by providing a handheld processing device. In the processing device, the housing base forms a rigid motor and tool support structure, which extends in an L-shape at least at a first housing side and at an adjacent second housing side, wherein the housing remainder forms a non-rigid housing remainder structure. In this case, the rigid motor and tool support structure can be formed in one piece or by a plurality of parts connected to each other. Depending on the requirements, the rigid motor and tool support structure only extends to the housing area (where the first and second housing sides meet) at the first and second housing sides when forming a pure, simple L-shape, or alternatively, additionally meets at the third housing side when forming an L-shape that expands into a U-shape, or further alternatively, does not extend only to the relevant housing area at the first and second housing sides on both sides, but extends beyond the housing area on one side, or in other words, is slightly offset inwards when forming an L-shape that expands into a T-shape.

[0010] The housing matrix forms a rigid motor and tool support structure and the housing remainder forms a non-rigid housing remainder structure. This feature should be understood at present that the housing matrix is ​​formed into a more rigid structure than the housing remainder and is formed in particular by a material for this purpose, and the material has a higher elastic modulus than the material selected differently from the housing remainder. In particular, the housing matrix has a rigidity sufficient to be able to keep the drive motor and the processing tool there with sufficient stability. The housing remainder is designed for a smaller and preferably significantly smaller rigidity relative to it, which can be advantageously used to keep the weight and material requirements for the processing equipment small and / or improve its drop characteristics, in that when the equipment falls on the ground unintentionally, the housing remainder can absorb the collision energy. In addition, it is helpful for the rigidity of the motor-and tool support structure that the structure extends at least at two adjacent housing sides when forming an L-shape. Thus, when using the same material as the material for the plate-like structure, the rigidity of the structure can also be improved relative to the pure plate-like structure. In addition, the rigidity of the housing remainder connected to the housing matrix in three dimensions (i.e., in space, rather than just in a plane) is also improved.

[0011] In a further development of the invention, the housing remainder and the housing base body differ in their modulus of elasticity by at least a factor of two, in particular by a factor of at least ten. This results in a correspondingly higher rigidity of the housing base body compared to the rigidity of the housing remainder.

[0012] In a further development of the invention, the first housing side forms a housing longitudinal side and the second housing side forms a housing transverse side, and the rigid motor- and tool-carrying structure of the housing base extends at the first housing side and at the second housing side over half the length of the spacing between the device front side and the device back side. As a result, a relatively high rigidity of the housing base is provided for the relevant housing longitudinal side and the relevant housing transverse side along the main length between the device front side and the back side, respectively, so that the motor housing can have a correspondingly high rigidity as a whole and a high stability for fixing the drive motor and the processing tool can be obtained. Here, the front side of the device is generally understood to be the front device side parallel to the housing transverse side, where the processing tool is located or the processing tool part protrudes forward beyond the front device side. Correspondingly, the back side of the device is understood to be the device side facing away from the device front side, where, for example, a battery compartment can be located or a battery compartment can protrude backwards from it, or where a rear handle can be located or a rear handle can protrude backwards from it.

[0013] In one embodiment of the invention, the rigid motor and tool support structure of the housing base extends on the first housing side from the device front side to the device back side. This contributes greatly to the high rigidity of the motor housing and the high stability for holding the drive motor and the processing tool, wherein the weight of the processing device can still be kept low in the desired manner due to the correspondingly lightweight embodiment of the housing remainder. In an alternative embodiment, the rigid motor and tool support structure extends on the first housing side over more than half, but less than the entire length.

[0014] In another embodiment of the invention, the rigid motor and tool support structure of the housing base extends additionally to a third housing side adjacent to the first housing side while forming a U-shape. In this case, the L-shape of the motor and tool support structure is expanded into a U-shape around another structural side (i.e., another U-shaped leg), which can advantageously contribute to increasing the rigidity of the motor and tool support structure provided by the housing base. Depending on requirements, additional device components can be mounted or held in a correspondingly stable manner on the third side of the rigid motor and tool support structure. In an alternative embodiment, the rigid motor and tool support structure extends only on the first housing side and the second housing side.

[0015] In a development of the invention, the rigid horse and tool support of the housing main body has a tool holder on the outside on the first housing side and a motor holder on the inside for holding the drive motor.

[0016] In a development of the invention, the rigid motor and tool support structure of the housing base extends in a plate-like manner on the first housing side and in a hollow body structure on the second housing side. The hollow body structure can contribute significantly to the high rigidity of the motor and tool support structure of the housing base.

[0017] In one design of the present invention, the hollow body structure forms a liquid container. Therefore, the hollow body structure of the housing base can be advantageously used to provide a liquid container. In an alternative embodiment, the hollow body structure can be formed, for example, by an open hollow profile.

[0018] In a further development of the invention, the housing base is formed from a metal material, while the housing remainder is formed from a plastic material. This is the best choice for many applications, on the one hand, for the material of the housing base and on the other hand, for the material of the housing remainder. Alternatively, both housing parts can be formed, for example, from a metal material or a plastic material.

[0019] In a further development of the invention, the processing device is designed as a motor-driven saw or a cutting machine or a hedge trimmer. This is an advantageous embodiment of a processing device, wherein a rigid motor and tool support structure can be well combined with an embodiment of the housing remainder with low weight, in order to provide the entire device with optimal stability at low weight, which makes it easier for the user to handle the processing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Advantageous embodiments are shown in the accompanying drawings. These and other advantageous embodiments of the present invention are described in more detail below. Among them:

[0021] Figure 1 A perspective sectional view of a part of the presently interesting part of a processing device embodied as a motor-driven saw of the tophandle type is shown,

[0022] Figure 2 Shows Figure 1 A perspective view of a portion of the housing remaining body of a motor housing of a motor saw,

[0023] Figure 3 shows a side view of the housing base of the motor housing,

[0024] Figure 4 shows a perspective view of the housing base,

[0025] Figure 5shows a perspective exploded view of a portion of a motor-driven saw associated with the housing,

[0026] Figure 6 Shown according to Figure 1 A view of an embodiment variant of the processing device as a motor-driven saw of the rear handle type,

[0027] Figure 7 Shows Figure 6 A perspective view of a housing base of a motor housing of a motor saw, and

[0028] Figure 8 Shown according to Figure 3 For Figure 6 Side view of an implementation variant. DETAILED DESCRIPTION

[0029] The figures show an exemplary embodiment of a handheld machining device according to the invention in the form of a so-called top-handle or rear-handle motor saw. Both motor saw types have Figure 1 and 6 The auxiliary handle 13 and the main handle 14 which can be partially seen in the figure, the main handle being located at the upper side GO of the device in the case of the top handle type, as shown in Figure 5 As can be seen in the figure, in the case of the rear handle type, it is located at the back side GH of the device, as shown by Figure 6 This is based on an orientation in which the relevant working tool parts (in this case the guide rail 15 and the saw chain serving as working tool 16 which can be driven around the guide rail 15 ) extend forward from the device front side GV.

[0030] As is clear from the illustrated embodiment, the processing device comprises a motor housing 1, which comprises a housing base body 2 and a housing remainder 4 (i.e. the remaining housing body) connected to the housing base body. Figure 1 and Figure 6 It is evident that the housing main body 2 extends at least on a first housing side 3 which, in the example shown, is located on the right side GR of the device.

[0031] The housing remainder 4 together with the housing base 2 surrounds a housing interior 5, in which a drive motor 6 is arranged and is held on the housing base 2. Here, "enclosed" means that the housing remainder 4 together with the housing base 2 completely surrounds the housing interior 5 at least in a plane perpendicular to the first housing side 3, forming a closed loop. Such a closed loop can be, for example, Figure 14 , which is shown in a section plane perpendicular to the first housing side, so that the closed loop can be clearly seen along the section line SL shown in this connection. In this example, the closed loop plane is therefore a horizontal plane in the normal use position of the motor-driven saw, in which the guide rail 15 is located in a vertical plane. Depending on requirements and application, such a closed loop can also be provided in a plane perpendicular to this closed loop plane and the first housing side 3 , which is surrounded by the housing base body 2 and the housing residual body 4 .

[0032] The housing base 2 has Figure 3 and 8 The tool holding device 7 for holding a processing tool 16 can be seen in the view of , in this case in particular a holding device with which the guide rail 15 and the saw chain arranged circumferentially thereon can be held together with the guide rail in the usual manner.

[0033] The housing base 2 forms a rigid motor and tool support structure, which extends in an L-shape at least on the first housing side 3 and the adjoining second housing side 8. The L-shape of the rigid motor and tool support structure along the first and second housing sides 3, 8 can be obtained, for example, from Figure 3 and 8 In the example shown, the second housing side 8 is located at the device front side GV.

[0034] The housing remainder 4 forms a non-rigid housing remainder structure, i.e. the housing remainder is designed to be less rigid than the housing base body 2, in particular by virtue of the housing remainder being composed of a material having a lower modulus of elasticity than the modulus of elasticity of the housing base body 2. In a corresponding embodiment, the housing remainder 3 and the housing base body 2 differ in their moduli of elasticity by at least a factor of two, preferably by a significantly higher factor, for example by at least a factor of ten or at least a factor of twenty. This can be achieved in particular by selecting correspondingly different materials for the housing base body 2 on the one hand and for the housing remainder 3 on the other hand, in particular also in the illustrated embodiment.

[0035] The housing base body 2 can be formed in one piece or in multiple pieces. In the example shown, it is formed in multiple pieces and comprises a first part 2a extending at least at the first housing side 3 and a second part 2b rigidly connected to this first part, which extends substantially at the second housing side 2 and is connected to the first part in a conventional manner, releasably or non-releasably. For this purpose, a releasable connection by means of a screw connection 17 is provided in the example shown.

[0036] The housing remainder 4 is also designed as a single piece or multiple pieces depending on the requirements. In a corresponding embodiment, the housing remainder forms a hood-like surrounding part, the hood interior of which forms a housing interior 5, in which the drive motor 6 is arranged and which is closed by the housing base 2 at one or more open sides.

[0037] The motor housing 1 formed by the housing base 2 and the housing remainder 4 can be implemented as required so that it only accommodates the drive motor 1 and its peripheral components or simultaneously forms an equipment housing, in which other equipment components of the processing equipment are also arranged, such as a blower 20 for the drive motor 6, and / or a rechargeable battery for powering the drive motor 6 when the drive motor is an electric drive motor instead of an internal combustion engine as in the illustrated embodiment. Figure 2 In particular, the main part of the housing remainder 4 is shown, which can be supplemented by one or more further housing parts to form the entire housing remainder 4. In the example shown, the housing remainder 4 thus forms, together with the housing base body 2, an appliance housing with a battery compartment 18 for receiving a rechargeable battery. Furthermore, in the example shown, the housing remainder 4 has a housing part 21 for a blower 20. In addition to the housing parts shown in the figures, the housing remainder 4 can also contain further housing parts, for example a housing part serving as an appliance cover part and / or one or more external appliance parts for an outer appliance cover.

[0038] In a corresponding embodiment, as in the illustrated embodiment, the first housing side 3 forms a longitudinal housing side (in the illustrated embodiment at the device right side GR) and the second housing side 8 forms a lateral housing side (in the illustrated embodiment at the device front side GV). Here, the rigid motor and tool support structure of the housing base 2 extends over more than half of the length between the device front side GV and the device back side GH at the first housing side 3 and at the second housing side 8 in the illustrated embodiment. Preferably, as in the illustrated example, the housing base 2 extends substantially over the entire length between the device front side GV and the device back side GH. In addition, the housing base 2 also extends over almost the entire length of the second housing side 8 in the illustrated example. With this design, the housing base 2 provides a very stable L-shaped rigid structure for the device as a whole.

[0039] In a corresponding embodiment, the rigid motor and tool support structure of the housing base body 2 is extended in a U-shape additionally on the third housing side 9 adjoining the first housing side 3, as in Figures 6 to 8 In the embodiment shown, the third housing side 9 is located at the device back side GH, as shown from Figure 6 Obvious. Figure 8The side view of FIG. 1 clearly shows the U-shape of the rigid motor and tool support structure of the housing base 2 in this embodiment. The extension of the housing base 2 along the first housing side 3 forms the central web of the U, while the extension of the housing base 2 at the second housing side 8 and the third housing side 9 forms the two U-legs.

[0040] In the example shown, the rigid motor and tool support structure of the housing base body 2 does not extend over its entire length at the third housing side 9, but only extends along approximately one third to approximately half of the length of the third housing side 9. The housing remainder 4 extends over the remaining length, which in the two shown embodiments also extends over the entire length of this housing side which is located opposite the first housing side 3 and is therefore located on the right side GR of the device, as shown from Figure 1 and 6 As is obvious in .

[0041] In a corresponding embodiment, the rigid motor and tool support structure of the housing base body 2, as in the illustrated embodiment, comprises a tool holder 7 on the outside at the first housing side 3 and a motor holder 10 on the inside for holding the drive motor 6. In the illustrated example, the tool holder 7 is adapted to the embodiment of the processing device as a motor saw to securely hold a guide rail 15 on the rigid motor and tool support structure of the housing base body 2, and the processing tool 16, i.e. a saw chain, is coupled to the drive shaft 19 of the drive motor 6 via a sprocket. In the illustrated example, the motor holder 10 comprises a sleeve-shaped stator support 10a or a motor flange, on which the stator 6a of the drive motor 6 is held in a rotationally fixed manner and through which the drive shaft 19 extends in a rotatable manner.

[0042] In a corresponding embodiment, the rigid motor and tool support structure of the housing base body 2 extends in a plate-like manner on the first housing side 3 and on the second housing side 8, as is the case in the example shown, while forming a hollow body structure 11. For the corresponding application, the hollow body structure 11 is designed so that it forms a liquid container 12. In the example shown, this is used in particular to form a lubricating oil tank as a liquid container 12, in which lubricating oil for the processing tool 16 can be stored.

[0043] In an advantageous embodiment, the housing base body 2 is made of a metallic material, while the housing remainder 4 is made of a plastic material. This material selection is also possible in particular in the illustrated embodiment. The housing base body can be made, for example, of one or more magnesium die-cast parts rigidly connected to one another, while the housing remainder can be made, for example, of a fiber-reinforced or non-fiber-reinforced plastic material.

[0044] In the exemplary embodiment shown, the processing device is designed as described as a motor-driven saw, in particular as an electric motor-driven saw, i.e. with an electric motor as drive motor 6. In alternative embodiments, the processing device is, for example, a motor-driven saw or a hedge trimmer with an internal combustion engine as drive motor, or other devices that can be used in gardening and forestry technology, or a cutting machine or other devices that can be used in construction and do-it-yourself technology.

[0045] As shown and the further embodiments explained above show, the present invention provides an advantageous handheld processing device with a motor housing and a drive motor accommodated therein, which can be implemented by the user with a relatively low device weight and high housing stability and optimal maneuverability. In particular, this is facilitated by the housing base forming a rigid motor and tool support structure, which extends at least at the first housing side and at the adjacent second housing side in a pure L-shape or an L-shape that is extended to a U-shape, and the housing remainder forms a non-rigid housing remainder structure. The processing device can be used for various processing purposes in corresponding embodiments, in particular in the technical fields of gardening and forestry technology as well as construction and do-it-yourself technology.

Claims

1. A handheld processing device, the handheld processing device having - a motor housing (1), comprising a housing base (2) extending at least at a first housing side (3) and a housing remainder (4) connected to the housing base (2) and which, together with the housing base (2), encloses a housing interior (5), and a drive motor (6) held on the housing base body (2) in the housing interior (5), wherein - the housing base (2) has a tool holding device (7) for holding a machining tool driven by the drive motor (6), It is characterized in that The housing base (2) forms a rigid motor and tool support structure, which extends in an L-shape at least on the first housing side (3) and on the adjoining second housing side (8), and The housing remainder (4) forms a non-rigid housing remainder structure.

2. The handheld processing device according to claim 1, further characterized in that: The handheld processing equipment is a gardening or forestry processing equipment.

3. The handheld processing device according to claim 1 or 2, further characterized in that: The housing remainder (3) and the housing base body (2) differ in their modulus of elasticity by at least a factor of two.

4. The handheld processing device according to claim 1 or 2, further characterized in that: The housing remainder (3) and the housing main body (2) differ in their moduli of elasticity by a factor of at least ten.

5. The handheld processing device according to claim 1 or 2, wherein: The first housing side (3) forms a longitudinal side of the housing and the second housing side (8) forms a lateral side of the housing, and the rigid motor and tool support structure of the housing base (2) extends on the first housing side (3) and the second housing side (8) respectively over more than half the length of the spacing between the device front side (GV) and the device back side (GH).

6. The handheld processing device according to claim 5, further characterized in that: The rigid motor and tool support structure of the housing base (2) extends from the device front side (GV) to the device rear side (GH) on the first housing side (3).

7. The handheld processing device according to claim 6, further characterized in that: The rigid motor and tool support structure of the housing base (2) is additionally extended in a U-shape at a third housing side (9) adjoining the first housing side (3).

8. The handheld processing device according to any one of claims 1 to 2, further characterized in that: The rigid motor and tool mounting structure of the housing base (2) has a tool holder (7) on the outside on the first housing side (3) and a motor holder (10) on the inside for holding the drive motor (6).

9. The handheld processing device according to any one of claims 1 to 2, further characterized in that: The rigid motor and tool support structure of the housing base body (2) extends in a plate-shaped manner on the first housing side (3) and in a hollow body structure (11) on the second housing side (8).

10. The handheld processing device according to claim 9, further characterized in that: The hollow body structure (11) forms a liquid container (12).

11. The handheld processing device according to any one of claims 1 to 2, further characterized in that: The housing base (2) is formed from a metal material, and the housing remainder (4) is formed from a plastic material.

12. The handheld processing device according to any one of claims 1 to 2, further characterized in that: The handheld processing device is designed as a motor-driven saw or a cutter or a hedge trimmer.

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